Cutting tool with replaceable blade

Abstract

The invention provides a cutting tool with a replaceable blade. The cutting tool comprises a first handheld part and a second handheld part. The second handheld part is rotatably connected to the first handheld part; the cutter further comprises a blade mounting plate and a blade; the blade mounting plate is rotatably mounted on the first handheld part; a blade is detachably mounted to the blade mounting plate. Wherein the blade mounting plate and the blade can be replaced by a ratchet wheel blade, and the ratchet wheel blade is detachably and rotatably mounted on the first handheld part.

Description

Technical Field

[0001] The present invention relates to a hand tool, in particular to a cutting tool with a replaceable blade. Background Art

[0002] As a common tool, the blade of a cutting tool may be damaged after being used for many times, which makes the entire tool useless and wastes a lot of resources. If the blade is replaceable, the service life of the tool can be better extended.

[0003] For some cutting tools with simple structures, the blades are easy to disassemble and install, and users can disassemble and replace the blades by themselves. However, for some cutting tools with complex structures, such as ratchet pipe cutters, non-professionals cannot operate and replace them. Once the blade is damaged, the entire cutting tool will lose its value.

[0004] Technical personnel in this field are committed to developing a new type of cutting tool with replaceable blades. Regardless of whether the cutting component is a simple fixed blade structure or a complex ratchet blade structure, the blade can be replaced conveniently and quickly, thereby effectively extending the service life of the cutting tool and avoiding waste of resources. Summary of the invention

[0005] The object of the present invention is to provide a cutting tool with replaceable blades to solve the technical problems of cutting tools with complex structures in the prior art, such as ratchet pipe cutting knives, in which blades are difficult to replace and can only be completely discarded after the blades are damaged.

[0006] To solve the above technical problems, the present invention provides a cutting tool with a replaceable blade, comprising: a first hand-held part; a second hand-held part rotatably connected to the first hand-held part; a blade mounting plate rotatably mounted to the first hand-held part; and a blade detachably mounted to the blade mounting plate.

[0007] Further, in different embodiments, the blade mounting plate includes a blade mounting plate body, the front end of which is mounted with the blade; and an arc plate, which is arranged at the rear end of the blade mounting plate body and is a part of the ratchet. The arc plate is a part of the ratchet, and the arc plate includes gear teeth, which are arranged on the arc-shaped side wall of the arc plate; and a gear tooth gap, which is arranged between any two adjacent gear teeth; wherein the second hand-held portion is provided with a first buckle and / or a second buckle on the side facing the first hand-held portion, which is engaged with any gear tooth gap.

[0008] Further, in different embodiments, the blade mounting plate includes a blade mounting plate block, which is disposed at the front end of the blade mounting plate body and connected to the middle of the arc-shaped plate; and a blade mounting plate bayonet, which is disposed between the blade mounting plate block and the arc-shaped plate, and whose opening direction faces the blade. The blade includes a blade spine; a blade edge, which is integrally arranged with the blade spine; a blade block, which is disposed at the edge of the blade and is arranged opposite to the blade edge, and the blade block is snapped into the blade mounting plate bayonet; and a blade bayonet, which is disposed between the blade block and the blade edge, and the blade mounting plate block is snapped into the blade bayonet.

[0009] Furthermore, in different embodiments, the blade mounting plate includes a spring installation notch, which is arranged on a side of the arc plate away from the arc side wall, and its opening direction is toward the blade; the blade includes a blade fixing bayonet, which is arranged opposite to the spring installation notch.

[0010] Further, in different embodiments, the spring installation notch includes a first notch portion, whose opening is located on a side of the arc plate away from the arc side wall; and a second notch portion, which is connected to the first notch portion and is arranged perpendicular to the first notch portion.

[0011] Furthermore, in different embodiments, the blade mounting plate includes a first blade mounting plate block, which is arranged at the front end of the blade mounting plate body; a second blade mounting plate block, which is arranged in the middle of the blade mounting plate body and corresponds to the blade spine; a third blade mounting plate block, which is arranged in the middle of the blade mounting plate body and corresponds to the blade edge; a first blade mounting plate opening, which is arranged between the first blade mounting plate block and the locking member; and a second blade mounting plate opening, which is arranged between the second blade mounting plate block and the third blade mounting plate block; the blade includes a blade spine; a blade edge is integrally arranged with the blade spine; a first blade A clamping block protrudes from the blade spine and is clamped into the first clamping port of the blade mounting plate; a second clamping block of the blade protrudes from the blade spine and is clamped into the second clamping port of the blade mounting plate; the first clamping port of the blade is arranged at the front end of the blade spine; the first clamping block of the blade mounting plate is clamped into the first clamping port of the blade and is tangent to the first clamping block of the blade; the second clamping port of the blade is arranged at the rear end of the blade spine; the second clamping block of the blade mounting plate is clamped into the second clamping port of the blade; and a third clamping port of the blade is arranged at the rear end of the blade edge; the third clamping block of the blade mounting plate is clamped into the third clamping port of the blade and is tangent to the second clamping block of the blade.

[0012] Further, in different embodiments, the blade mounting plate includes an elastic member mounting notch connected to the first bayonet of the blade mounting plate; and a locking member mounting notch connected to the elastic member mounting notch; the blade includes a blade locking block protruding from the first blade block; and a blade locking bayonet surrounded by the blade locking block, the first blade block and the blade spine; the cutting tool with replaceable blade also includes a locking member, which includes an integrally arranged locking rod that slides in the locking member mounting notch, and its front end is snapped into the blade locking bayonet; and a locking block that is connected to the middle part of the locking rod and slides in the elastic member mounting notch; and an elastic member that is arranged in the elastic member mounting notch, one end of the elastic member is connected to the side wall of the locking block, and the other end of the elastic member is connected to the inner side wall of the elastic member mounting notch.

[0013] Furthermore, in different embodiments, the cutting tool with replaceable blade also includes a first clamping plate, which is attached to and fixed on one side of the blade mounting plate; and a second clamping plate, which is attached to and fixed on the other side of the blade mounting plate; the connection between the blade and the blade mounting plate is clamped between the first clamping plate and the second clamping plate.

[0014] Furthermore, in different embodiments, the cutting tool with replaceable blade also includes a first waist-shaped groove, which passes through the first clamping plate; a second waist-shaped groove, which passes through the second clamping plate and is arranged opposite to the first waist-shaped groove; a toggle rod, which passes through the first waist-shaped groove, the spring clip mounting notch and / or the blade fixing bayonet and the second waist-shaped groove in sequence; and a spring clip, which is arranged in the spring clip mounting notch; one end of the spring clip is fixed to the blade mounting plate, and the other end thereof is tangent to the side wall of the toggle rod.

[0015] Further, in different embodiments, the cutting tool with replaceable blade also includes a blade pin mounting hole, which passes through the blade and is located on the blade spine near the blade mounting plate; a first clamping plate pin mounting hole, which passes through the first clamping plate and is arranged opposite to the blade pin mounting hole; a second clamping plate pin mounting hole, which passes through the second clamping plate and is arranged opposite to the blade pin mounting hole; a pin, which passes through the second clamping plate pin mounting hole, the blade pin mounting hole and the first clamping plate pin mounting hole in sequence, a pin cap is provided at one end of the pin, and a concave positioning groove is provided on the side wall of the other end; a positioning ball is provided at the opening of the positioning groove; and a positioning spring, one end of which is connected to the bottom of the positioning groove, and the other end of which is connected to the positioning ball.

[0016] Further, in different embodiments, the cutting tool with replaceable blade also includes a first control hole, which passes through the first clamp; a second control hole, which passes through the second clamp; a third toggle member, which protrudes from the side of the locking block toward the first clamp and passes through the first control hole; and a fourth toggle member, which protrudes from the side of the locking rod toward the second clamp and passes through the second control hole.

[0017] Further, in different embodiments, the first clamping plate includes a first clamping plate arc plate, which is provided at the rear end of the first clamping plate and is a part of the ratchet; first clamping plate gear teeth, which are provided at the arc-shaped side wall of the first clamping plate arc plate; and a first clamping plate gear tooth gap, which is provided between any two adjacent first clamping plate gear teeth. The second clamping plate includes a second clamping plate arc plate, which is provided at the rear end of the second clamping plate and is a part of the ratchet; second clamping plate gear teeth, which are provided at the arc-shaped side wall of the second clamping plate arc plate; and a second clamping plate gear tooth gap, which is provided between any two adjacent second clamping plate gear teeth.

[0018] To solve the above technical problems, the present invention also provides another cutting tool with replaceable blades, comprising: a first handheld part; a second handheld part rotatably connected to the first handheld part; and a ratchet blade detachably and rotatably mounted to the first handheld part.

[0019] Furthermore, in different embodiments, the cutting tool with replaceable blades further comprises a detachable pin, which is arranged at the connection between the first hand-held part and the ratchet blade, and the first hand-held part and the ratchet blade can rotate around the detachable pin.

[0020] Further, in different embodiments, the cutting tool with replaceable blade also includes a first side wall through hole of the first hand-held part, which passes through the first side wall of the first hand-held part; a second side wall through hole of the first hand-held part, which passes through the second side wall of the first hand-held part; and a blade through hole, which passes through the ratchet blade; wherein the detachable pin shaft passes through the first side wall through hole of the first hand-held part, the blade through hole and the second side wall through hole of the first hand-held part in sequence.

[0021] Further, in different embodiments, the detachable pin shaft includes a hollow shaft, which includes an integrally formed hollow sleeve, which passes through the first side wall through hole of the first hand-held part, the blade through hole and the second side wall through hole of the first hand-held part in sequence; and a sleeve base, which is exposed on the outside of the first side wall of the first hand-held part; and a rotating member, which includes an integrally formed rotating shaft, which is inserted into and threadedly connected to the hollow sleeve; and a rotating shaft base, which is exposed on the outside of the second side wall of the first hand-held part, and its outer surface is provided with a straight or cross-shaped groove.

[0022] Furthermore, in different embodiments, the detachable pin includes a nut, exposed on the outside of the first side wall of the first hand-held part; and a screw, which passes through the through hole of the first side wall of the first hand-held part, the blade through hole and the through hole of the second side wall of the first hand-held part in sequence, and its front end is threadedly connected to the nut, and its rear end is provided with a screw base; the screw base is exposed on the outside of the second side wall of the first hand-held part, and its outer surface is provided with a straight or cross-shaped groove.

[0023] Furthermore, in different embodiments, the ratchet blade includes a cutting portion, which is arranged at the front end of the ratchet blade; an arc plate, which is arranged at the rear end of the ratchet blade; and a connecting portion, which is used to connect the cutting portion and the arc plate and is rotatably connected to the first hand-held portion.

[0024] Further, in different embodiments, the cutting portion includes a blade spine portion facing the outside of the first hand-held portion; and a blade portion facing the second opening of the first hand-held portion. The arc plate is a part of a ratchet, which includes gear teeth provided on the arc-shaped side wall of the arc plate; and a gear tooth gap provided between any two adjacent gear teeth; wherein the second hand-held portion is provided with a first buckle and / or a second buckle on the side facing the first hand-held portion, which is engaged with any gear tooth gap.

[0025] Furthermore, in different embodiments, the cutting tool with replaceable blade also includes a third elastic member, one end of which is fixed to the first hand-held part, and the other end of which is fixed to the ratchet blade; an arc plate clamping hole, which passes through one end of the arc plate and is clamped by one end of the third elastic member; or a connecting part clamping groove, which is recessed in the side wall of the connecting part and is clamped by one end of the third elastic member.

[0026] The beneficial effect of the present invention is that the present invention provides a cutting tool with replaceable blades, which can realize rapid replacement of blades, is simple to operate, and is easy to use; it has low requirements on hands-on ability, and ordinary users can perform the operation of replacing blades, which can effectively extend the overall service life of the cutting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention in a locked state;

[0028] Figure 2 is a schematic structural diagram of embodiment 1 of the present invention in which the first side wall of the first hand-held part is removed;

[0029] Figure 3 is a schematic structural diagram of the first hand-held part in Embodiment 1 of the present invention;

[0030] Figure 4 is a schematic structural diagram of the second hand-held part in Embodiment 1 of the present invention;

[0031] Figure 5 is a schematic diagram of the structure of some components inside the first and second hand-held parts in Example 1 of the present invention;

[0032] Figure 6 is a schematic structural diagram of a blade mounting plate in Embodiment 1 of the present invention;

[0033] Figure 7 is a schematic diagram of the exploded structure of the cutting structure and the first hand-held part in Embodiment 1 of the present invention;

[0034] Figure 8 is a schematic structural diagram of the second fastener in Embodiment 1 of the present invention;

[0035] Fig. 9 is a schematic structural diagram of a blade in Embodiment 1 of the present invention;

[0036] Fig.10 is a schematic structural diagram of the toggle lever in Embodiment 1 of the present invention;

[0037] Fig.11 is a schematic structural diagram of the spring piece in Embodiment 1 of the present invention;

[0038] Fig.12 is a schematic diagram of the decomposed structure of the cutting structure in Example 1 of the present invention;

[0039] Fig.13 This is a schematic diagram of the overall structure of Example 1 of the present invention in an unlocked state;

[0040] Fig.14 is a schematic diagram of the overall structure of the cutting structure in Example 2 of the present invention;

[0041] Fig.15 is a schematic diagram of the decomposed structure of the cutting structure in Example 2 of the present invention;

[0042] Fig.16 is a schematic structural diagram of a blade mounting plate in Embodiment 2 of the present invention;

[0043] Fig.17 is a schematic structural diagram of a blade in Embodiment 2 of the present invention;

[0044] Fig.18 is a schematic structural diagram of a pin shaft in Embodiment 2 of the present invention;

[0045] Fig.19 is a schematic diagram of the decomposed structure of the cutting structure in Example 3 of the present invention;

[0046] Fig. 20 is a schematic diagram of the overall structure of the cutting structure in Example 3 of the present invention;

[0047] Fig.21is a schematic diagram of the structure of the cutting structure after the second clamping plate is removed in Embodiment 3 of the present invention;

[0048] Fig. 22 is a schematic structural diagram of a blade mounting plate in Embodiment 3 of the present invention;

[0049] Fig.23 is a schematic structural diagram of a blade in Embodiment 3 of the present invention;

[0050] Fig.24 is a schematic structural diagram of an elastic member and a locking key in Embodiment 3 of the present invention;

[0051] Fig.25 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention in an open state;

[0052] Fig.26 is a schematic structural diagram of the first hand-held part in Embodiment 4 of the present invention;

[0053] Fig. 27 is a schematic structural diagram of the first hand-held part and some of its internal components in Embodiment 4 of the present invention;

[0054] Fig.28 is a schematic structural diagram of a second hand-held part in Embodiment 4 of the present invention;

[0055] Fig.29 is a schematic structural diagram of the internal components of the first and second hand-held parts in Example 4 of the present invention;

[0056] Fig.30 is a schematic structural diagram of a detachable pin shaft in Embodiment 4 of the present invention;

[0057] Fig.31 is a schematic structural diagram of a ratchet blade in Embodiment 4 of the present invention;

[0058] Fig.32 is a schematic diagram of the overall structure of Embodiment 5 of the present invention;

[0059] Fig.33 is a schematic diagram of the decomposed structure of part of the structure of Embodiment 5 of the present invention;

[0060] Fig.34 is a schematic diagram of the structure of the internal components of the first and second hand-held parts in Example 5 of the present invention;

[0061] Fig.35 is a schematic structural diagram of a ratchet blade in Example 5 of the present invention;

[0062] Fig.36 It is a schematic diagram of the structure of the detachable pin shaft in Example 5 of the present invention.

[0063] The components in the figure are identified as follows:

[0064] 1 first hand-held part, 2 second hand-held part, 3 blade mounting plate, 4 blade, 5 ratchet blade;

[0065] 6 detachable pin, 7 first clamping plate, 8 second clamping plate, 9 first fastener, 10 second fastener;

[0066] 11 a first side wall of the first hand-held part, 12 a second side wall of the first hand-held part, 13 an opening of the first hand-held part;

[0067] 14 first pin, 15 first buckle, 16 first elastic member, 17 first arc groove,

[0068] 18 second arc-shaped groove, 19 third elastic member, 20 torsion spring mounting shaft;

[0069] 21 a first side wall of the second hand-held part, 22 a second side wall of the second hand-held part, 23 an opening of the second hand-held part,

[0070] 24 second pin shaft, 25 second buckle, 26 second elastic member, 27 hand-held part fixing device;

[0071] 31 blade mounting plate body, 32 arc plate, 33 blade mounting plate through hole, 34 blade mounting plate block,

[0072] 35 blade mounting plate bayonet, 36 spring piece mounting notch;

[0073] 41 blade spine portion, 42 blade edge portion, 43 blade clamp block, 44 blade bayonet, 45 blade fixing bayonet, 46 blade pin shaft mounting hole;

[0074] 51 cutting portion, 52 arc-shaped plate, 53 connecting portion, 54 blade through hole;

[0075] 61 hollow shaft, 62 rotating member, 63 nut, 64 screw rod, 65 screw rod base;

[0076] 71 first clamping plate through hole, 72 first waist groove, 73 first clamping plate pin shaft mounting hole, 74 first control hole, 75 first clamping plate arc plate, 76 first clamping plate gear teeth, 77 first clamping plate gear tooth gap;

[0077] 81 second clamping plate through hole, 82 second waist-shaped groove, 83 second clamping plate pin shaft mounting hole, 84 second control hole;

[0078] 85 second clamping plate arc plate, 86 second clamping plate gear teeth, 87 second clamping plate gear teeth gap;

[0079] 91 a toggle lever, 92 a spring piece, 93 a locking member, 94 a fourth elastic member;

[0080] 95 pin, 96 positioning ball, 97 positioning spring, 98 pin cap, 99 positioning groove;

[0081] 101 nut base, 102 rod nut, 103 screw base, 104 screw;

[0082] 111 a through hole on the first side wall of the first hand-held part; 121 a through hole on the second side wall of the first hand-held part;

[0083] 131 first opening 131 of the first hand-held part, 132 second opening of the first hand-held part;

[0084] 311 blade mounting plate first block, 312 blade mounting plate second block,

[0085] 313 blade mounting plate third clamp, 314 blade mounting plate first clamp,

[0086] 315 a second bayonet of the blade mounting plate, 316 an elastic member mounting notch, 317 a locking member mounting notch;

[0087] 321 gear teeth, 322 gear tooth gap; 361 first notch portion, 362 second notch portion;

[0088] 411 a first blade block, 412 a second blade block, 413 a first blade opening, 414 a second blade opening, 415 a third blade opening, 416 a blade locking block, 417 a blade locking opening;

[0089] 511 blade spine 511, 512 blade edge, 521 gear teeth, 522 gear tooth gap;

[0090] 531 is a connecting portion slot, 532 is an arc-shaped plate clamping hole;

[0091] 611 hollow shaft sleeve, 612 shaft sleeve base, 621 rotating shaft, 622 rotating shaft base;

[0092] 911 a first toggle button, 912 a first toggle post, 913 a second toggle button, 914 a second toggle post;

[0093] 921 straight portion, 922 bent portion;

[0094] 931 is a locking rod, 932 is a locking block, 933 is a third toggle member, and 934 is a fourth toggle member. DETAILED DESCRIPTION

[0095] The following fully describes the preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and its protection scope is not limited to the embodiments mentioned in the text.

[0096] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0097] The directional terms mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, side, top, bottom, top end, bottom end, end, etc., are only directions in the drawings and are only used to explain and illustrate the present invention, rather than to limit the scope of protection of the present invention.

[0098] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0099] Example 1

[0100] like Figures 1-2 As shown, this embodiment provides a cutting tool with a replaceable blade, including a first hand-held part 1, a second hand-held part 2, a blade mounting plate 3, and a blade 4.

[0101] like Figure 3 As shown, the first hand-held portion 1 includes a first hand-held portion first side wall 11 and a first hand-held portion second side wall 12 which are opposite to each other and integrally arranged. The first hand-held portion first side wall 11 and the first hand-held portion second side wall 12 form a first hand-held portion opening cavity 13, and its opening direction is toward the second hand-held portion 2; the blade mounting plate 3 and a part of the blade 4 are arranged in the first hand-held portion opening cavity 13.

[0102] like Figure 4 As shown, this embodiment further includes a first pin shaft 14, a first buckle 15 and a first elastic member 16. The first pin shaft 14 is vertically mounted on the inner sides of the two side walls 11 and 12 of the first hand-held part 1; the first hand-held part 1 and the second hand-held part 2 are rotatably mounted on the first pin shaft 14. The rear end of the first buckle 15 is rotatably mounted on the first pin shaft 14, and its front end is engaged with any gear tooth gap 322. One end of the first elastic member 16 is connected to the first hand-held part 1, and the other end thereof is connected to the first buckle 15. In this embodiment, the first elastic member 16 is preferably a torsion spring, so that the first buckle 15 can rotate within a certain range. As shown in FIG. Figures 4-5As shown, the first hand-held part 1 is mounted with a blade 4 at one end and further includes a first arc groove 17 and a second arc groove 18. The first arc groove 17 is arranged at the edge of the first side wall 11 of the first hand-held part; the second arc groove 18 is arranged at the edge of the second side wall 12 of the first hand-held part and is arranged opposite to the first arc groove 17; the first arc groove 17 and the second arc groove 18 are respectively arranged on both sides of the opening of the first hand-held part opening cavity 13, and the two arc grooves 17 and 18 are used to place and fix the pipe to achieve the function of pipe cutting. The blade 4 is facing the first hand-held part opening cavity 13, and after the cutting process is completed, the blade 4 falls into the first hand-held part opening cavity 13.

[0103] like Figures 4-5 As shown, the second hand-held part 2 is rotatably connected to the first hand-held part 1. The second hand-held part 2 includes a second hand-held part first side wall 21 and a second hand-held part second side wall 22 which are opposite to each other and integrally arranged, and the second hand-held part first side wall 21 and the second hand-held part second side wall 22 enclose a second hand-held part opening cavity 23, and the opening direction of the second hand-held part opening cavity 23 faces the first hand-held part 1.

[0104] like Figures 4-5 As shown, this embodiment further includes a second pin 24, a second buckle 25 and a second elastic member 26. The second pin 24 is vertically mounted on the inner sides of the two side walls 21 and 22 of the second hand-held part 2. The rear end of the second buckle 25 is rotatably sleeved on the second pin 24, and the front end thereof is engaged with any gear tooth gap 322; one end of the second elastic member 16 is connected to the second hand-held part 2, and the other end thereof is connected to the second buckle 25. The second elastic member 26 is preferably a torsion spring, which is sleeved on the second pin 24, one end of the torsion spring is connected to the first hand-held part 1, and the other end thereof is detachably connected to the second buckle 25, so that the second buckle 25 can rotate within a certain range.

[0105] In this embodiment, the first buckle 15 or the second buckle 25, under the action of the first elastic member 16 or the second elastic member 26, clamps the gear tooth gap at an appropriate position. During the process of cutting the pipe, the two buckles can assist the blade to exert force and cut the pipe between the blade 4 and the two arc-shaped grooves 17 and 18, thereby achieving a labor-saving effect. The pipe will produce a certain vibration during cutting, causing discomfort to the user's hands. The first elastic member 16 or the second elastic member 26 can play a role in shock absorption and buffering. The first elastic member 16 and the second elastic member 26 can assist the first hand-held part 1 and the second hand-held part 2 to close or open. Its working principle is the same as that of similar pipe cutting knives, which will not be repeated here.

[0106] like Figure 2As shown, the present embodiment further includes a third elastic member 19, one end of which is connected to the first hand-held portion 1, and the other end of which is connected to the blade mounting plate 3. The third elastic member 19 is preferably a tension spring. In the present embodiment, during the opening or closing process of the first hand-held portion 1 and the second hand-held portion 2, the third elastic member 19 assists in exerting force or limits the range of motion of the blade mounting plate 3 and the blade 4, which can ensure that the angle of the opening is within an appropriate range, prevent damage to the components, and reduce safety risks during use.

[0107] A hand-held part fixing device 27 is provided at the end of the second hand-held part 2 , one end of which is hinged to the end of the second hand-held part 2 , and the other end of which is detachably mounted to the end of the first hand-held part 1 for closing the first hand-held part 1 and the second hand-held part 2 .

[0108] like Figure 6 As shown, the blade mounting plate 3 is rotatably mounted to the first hand-held part 1, and the blade mounting plate 3 includes a blade mounting plate through hole 33. The blade mounting plate 3 can rotate with the central axis of the blade mounting plate through hole 33 as the rotation axis. The blade 4 is detachably mounted to the blade mounting plate 3. Preferably, the blade 4 and the blade mounting plate 3 are located in the same plane, and the blade 4 and the blade mounting plate 3 are combined into one body, and the outer edge shape, working principle and function thereof are basically equivalent to a complete ratchet blade. The blade mounting plate 3 includes a blade mounting plate body 31, a blade 4 is installed at its front end, and an arc plate 32 is provided at its rear end. The arc plate 32 is a part of the ratchet. The arc plate 32 includes an arcuate edge portion and a non-arculated edge portion, and its side wall includes an arcuate side wall and a non-arculated side wall; the arcuate side wall of the arc plate 32 is provided with a plurality of equally spaced gear teeth 321, and the arcuate side wall of the arc plate 32 faces the second hand-held part 2, and a gear tooth gap 322 is formed between any two adjacent gear teeth 321, so that the first buckle 15 or the second buckle 25 provided in the opening cavity 23 of the second hand-held part can be inserted into any gear tooth gap 322.

[0109] This embodiment is opened or closed when in use, the first hand-held part 1 and the second hand-held part 2 rotate relative to each other, and the arc plate 32 of the blade mounting plate 3 cooperates with the first buckle 15 and the second buckle 25, so that the blade 4 can achieve effective cutting operation, which is the same as the working principle of the existing ratchet pipe cutting knife and will not be elaborated here.

[0110] like Figure 7 As shown, this embodiment further includes a first clamping plate 7 and a second clamping plate 8 for fixing the blade 4 and the blade mounting plate 3. The first clamping plate 7 is attached to and fixed on one side of the blade mounting plate 3; the second clamping plate 8 is attached to and fixed on the other side of the blade mounting plate 3; and the connection between the blade 4 and the blade mounting plate 3 is clamped between the first clamping plate 7 and the second clamping plate 8.

[0111] This embodiment further includes a first fastener 9 and a second fastener 10. The first fastener 9 fixes the first clamping plate 7 and the second clamping plate 8 to both sides of the blade mounting plate 3; the edges of the first clamping plate 7, the second clamping plate 8 and the blade mounting plate 3 are respectively provided with a plurality of fastener mounting holes (not shown) at corresponding positions, and the first fastener 9 includes but is not limited to rivets or bolts, which pass through the first clamping plate 7, the blade mounting plate 3 and the second clamping plate 8 in sequence, so as to assemble the first clamping plate 7, the second clamping plate 8 and the blade mounting plate 3 together.

[0112] The second fastener 10 sequentially assembles the first side wall 11 of the first hand-held part, the first clamping plate 7, the blade mounting plate 3, the second clamping plate 8 and the second side wall 12 of the first hand-held part, so that the blade mounting plate 3 is hinged to the first hand-held part 1 and the two can rotate relative to each other.

[0113] Specifically, the first side wall 11 of the first hand-held portion is provided with a first hand-held portion first side wall through hole 111; the first hand-held portion second side wall 12 is provided with a first hand-held portion second side wall through hole 121; the first clamping plate 7 is provided with a first clamping plate through hole 71; the second clamping plate 8 is provided with a second clamping plate through hole 81; the blade mounting plate 3 is provided with a blade mounting plate through hole 33. The second fastener 10 includes but is not limited to a bolt, which passes through the first side wall through hole 111 of the first hand-held portion, the first clamping plate through hole 71, the blade mounting plate through hole 33, the second clamping plate through hole 81 and the first hand-held portion second side wall through hole 121 in sequence.

[0114] like Figures 7-8 As shown, the second fastener 10 is preferably a bolt, including a nut portion and a screw portion, wherein the nut portion includes an integrally formed nut base 101 and a rod nut 102, and the screw portion includes an integrally formed screw base 103 and a screw 104. The nut base 101 is attached to the outer surface of the first side wall 11 of the first hand-held portion; the screw base 103 is attached to the outer surface of the second side wall 12 of the first hand-held portion. The rod nut 102 is vertically fixed to the nut base 101, and passes through the first side wall through hole 111 of the first hand-held portion, the first clamping plate through hole 71, the blade mounting plate through hole 33, the second clamping plate through hole 81 and the second side wall through hole 121 of the first hand-held portion in sequence. A threaded cavity is provided in the center of the rod nut 102, and the screw 104 is rotatably threadedly connected to the threaded cavity, which is used to adjust the relative position of the nut base 101 and the screw base 103.

[0115] The blade mounting plate 3, the blade 4, the first clamping plate 7 and the second clamping plate 8 together form a cutting structure. The cutting structure of this embodiment is a ratchet-type component.

[0116] like Figure 6As shown, in this embodiment, the blade mounting plate 3 includes a blade mounting plate block 34 and a blade mounting plate bayonet 35. The blade mounting plate block 34 is arranged at the front end of the blade mounting plate body 31 and connected to the non-arc-shaped edge portion in the middle of the arc-shaped plate 32; the blade mounting plate bayonet 35 is arranged between the blade mounting plate block 34 and the arc-shaped plate 32, and its opening direction faces the blade 4.

[0117] like Figure 6 , Fig. 9 As shown, in this embodiment, the blade 4 includes a blade spine portion 41 and a blade edge portion 42 that are integrally arranged, and also includes a blade clamping block 43 and a blade clamping port 44. The blade clamping block 43 is arranged at the edge of the blade 4, opposite to the blade edge portion 42, and located in the same direction as the blade edge portion 42. The blade clamping block 43 is clamped into the blade mounting plate clamping port 35. The blade clamping port 44 is arranged between the blade clamping block 43 and the blade edge portion 42, and the blade mounting plate clamping block 34 is clamped into the blade clamping port 44, so that the blade mounting plate 3 and the blade 4 can be assembled as a whole and remain relatively stable.

[0118] like Figure 6 , Figure 7 , Fig. 9 As shown, the blade mounting plate 3 also includes a spring piece mounting notch 36, which is arranged on a side of the arc plate 32 away from the arc side wall, and its opening direction faces the blade 4; it is used to assemble the spring piece. The spring piece mounting notch 36 includes a first notch portion 361 and a second notch portion 362. The first notch portion 361 has an opening located on a side of the arc plate 32 away from the arc side wall; the second notch portion 362 is connected to the first notch portion 361 and is arranged perpendicular to the first notch portion 361. The blade 4 includes a blade fixing bayonet 45, which is arranged opposite to the spring piece mounting notch 35, specifically, facing a part of the first notch portion 361.

[0119] like Figure 7 As shown, the first clamping plate 7 is provided with a first waist-shaped groove 72; the second clamping plate 8 is provided with a second waist-shaped groove 82, which is arranged opposite to the first waist-shaped groove 72; the first waist-shaped groove 72, the second waist-shaped groove 82 and a part of the first notch portion 361 and the blade fixing bayonet 45 are arranged opposite to each other, forming a toggle through hole that simultaneously passes through the first clamping plate 7, the blade mounting plate 3 and the second clamping plate 8, for accommodating the toggle rod 91.

[0120] like Figure 7 , Fig.10 As shown, this embodiment further includes a toggle rod 91, which sequentially passes through the first waist groove 72, the spring piece installation notch 36 and / or the blade fixing bayonet 45 and the second waist groove 82. The toggle rod 91 includes a first toggle member and a second toggle member connected to each other. The first toggle member includes an integrally formed first toggle button 911 and a first toggle column 912, and the second toggle member includes an integrally formed second toggle button 913 and a second toggle column 914.

[0121] like Figure 1 , Figure 2 , Fig.10 As shown, the first toggle member and the second toggle member are respectively inserted into the first waist groove 72 and the second waist groove 82 from both sides of the blade mounting frame 3, and are combined into a toggle rod 91. The first toggle button 911 is tangent to the first clamping plate 71 and exposed outside the first clamping plate 7; the second toggle button 913 is tangent to the second clamping plate 82 and exposed outside the second clamping plate 8. The first toggle column 912 passes through the first waist groove 72; the second toggle column 914 passes through the second waist groove 82 and is connected to the first toggle column 912. The middle part of the first toggle column 912 is a cavity with a thread, and the second toggle column 914 is inserted into the cavity of the first toggle column 912. The first toggle button 911 is exposed outside the first hand-held part 1, so that the user can use the toggle rod 91 to perform a blade replacement operation.

[0122] like Fig.11 , Fig.12 As shown, this embodiment further includes a spring sheet 92, which is disposed in the spring sheet installation notch 36; one end of the spring sheet 92 is fixed to the blade installation plate 3, and the other end thereof is tangent to the side wall of the toggle rod 91. Specifically, the spring sheet 92 is tangent to the side wall of the first toggle column 912, so as to push the first toggle column 912 against the blade fixing bayonet 45, so that the blade 4 can be fixed to the blade installation plate 3. When the first toggle button 911 is toggled, the first toggle column 912 is disengaged from the blade fixing bayonet 45, and the blade 4 can be removed from its spine direction.

[0123] The spring piece 92 includes an integrally formed straight portion 921 and a bent portion 922. The straight portion 921 is disposed in the first notch portion 361; the bent portion 922 is disposed in the second notch portion 362; one end of the straight portion 921 is connected to the bent portion 922, and the other end thereof is tangent to the side wall of the toggle rod 91 (the first toggle column 912). Figure 1 , Fig.11 and Fig.12 As shown, when the blade 4 is mounted on the blade mounting plate 3, the toggle lever 91 is in the locking position, and the spring piece 92 is slightly deformed, so that the toggle lever 91 is pressed against the blade fixing slot 45. Since the blade clamping block 43 is clamped into the blade mounting plate slot 35, and the blade mounting plate clamping block 34 is clamped into the blade slot 44, the blade 4 is locked on the blade mounting plate 3 at this time, so that the cutting tool described in this embodiment can be used normally. The specific method of use is the same as that of the blade fixed pipe cutting knife, which will not be described in detail here.

[0124] like Fig.13As shown, when the blade 4 is damaged and needs to be replaced, it is only necessary to slide the toggle lever 91 from the locking position 93 to the unlocking position. The spring piece 92 deforms significantly, and the toggle lever 91 disengages from the blade fixing bayonet 45 and slides into the spring piece mounting notch 36. At this time, the user can pull out the blade 4 of the blade mounting plate 3 toward the blade spine 41, and then install the spare blade into the blade mounting plate 3, release the toggle lever 91, and let it slide back to the locking position under the action of the spring piece 92, and lock the newly installed spare blade on the blade mounting plate 3 again, so that the cutting tool can be used normally, completing the entire blade replacement process.

[0125] The beneficial effect of this embodiment is that it provides a cutting tool with replaceable blades, which can realize quick replacement of blades and is simple to operate and easy to use; it has low requirements on hands-on ability and ordinary users can replace the blades, which can effectively extend the overall service life of the cutting tool.

[0126] Example 2

[0127] This embodiment provides a cutting tool with a replaceable blade, including most of the technical features of the embodiment 1, and only the features of the cutting structure are different, such as Figures 14-15 As shown, the cutting structure is composed of a blade mounting plate 3, a blade 4, a first clamping plate 7, and a second clamping plate 8.

[0128] Specifically, the cutting structure of the present embodiment is also a ratchet-type component, the blade mounting plate 3 is rotatably mounted to the first hand-held part 1 ; the blade 4 is detachably mounted to the blade mounting plate 3 .

[0129] like Fig.16 As shown, the blade mounting plate 3 includes a blade mounting plate body 31, a blade 4 is installed at its front end, and an arc plate 32 is provided at its rear end. The arc plate 32 is a part of the ratchet. The arc plate 32 includes an arcuate edge portion and a non-arculated edge portion, and its side wall includes an arcuate side wall and a non-arculated side wall; the arcuate side wall of the arc plate 32 is provided with a plurality of equally spaced gear teeth 321, and a gear tooth gap 322 is formed between any two adjacent gear teeth 321, so that the first buckle 15 or the second buckle 25 provided in the opening cavity 23 of the second hand-held part can be inserted into any gear tooth gap 322.

[0130] The blade mounting plate 3 comprises a blade mounting plate through hole 33 , and the blade mounting plate 3 can rotate with the central axis of the blade mounting plate through hole 33 as a rotation axis.

[0131] In this embodiment, the blade mounting plate 3 includes a blade mounting plate block 34 and a blade mounting plate bayonet 35. The blade mounting plate block 34 is disposed at the front end of the blade mounting plate body 31 and connected to the non-arc-shaped edge portion in the middle of the arc-shaped plate 32; the blade mounting plate bayonet 35 is disposed between the blade mounting plate block 34 and the arc-shaped plate 32, and its opening direction faces the blade 4.

[0132] like Figures 15 to 17 As shown, in this embodiment, the blade 4 includes a blade spine portion 41 and a blade edge portion 42 that are integrally arranged, and also includes a blade clamping block 43 and a blade clamping port 44. The blade clamping block 43 is arranged at the edge of the blade 4, opposite to the blade edge portion 42, and located in the same direction as the blade edge portion 42. The blade clamping block 43 is clamped into the blade mounting plate clamping port 35. The blade clamping port 44 is arranged between the blade clamping block 43 and the blade edge portion 42, and the blade mounting plate clamping block 34 is clamped into the blade clamping port 44, so that the blade mounting plate 3 and the blade 4 are assembled as a whole and remain relatively stable.

[0133] This embodiment does not include the toggle rod 91 and the spring 92 , the blade mounting plate 3 does not include the spring mounting notch 36 , the first clamping plate 7 is not provided with the first waist groove 72 , and the second clamping plate 8 is not provided with the second waist groove 82 .

[0134] like Fig.15 , Fig.17 As shown, this embodiment includes a blade pin mounting hole 46, a first clamping plate pin mounting hole 73, and a second clamping plate pin mounting hole 83. The blade pin mounting hole 46 passes through the blade 4 and is located at the portion of the blade spine 41 close to the blade mounting plate 3. The first clamping plate pin mounting hole 73 passes through the first clamping plate 7 and is arranged opposite to the blade pin mounting hole 46; the second clamping plate pin mounting hole 83 passes through the second clamping plate 8 and is arranged opposite to the blade pin mounting hole 46.

[0135] like Fig.18 As shown, this embodiment includes a pin 95, a positioning ball 96 and a positioning spring 97. The pin 95 passes through the second clamping plate pin mounting hole 83, the blade pin mounting hole 46 and the second clamping plate pin mounting hole 73 in sequence. A pin cap 98 is provided at one end of the pin 95, and a concave positioning groove 99 is provided on the side wall at the other end. The positioning ball 96 is provided at the opening of the positioning groove 99; one end of the positioning spring 97 is fixedly connected to the bottom of the positioning groove 99, and the other end thereof is fixedly connected to the positioning ball 96. The diameter of the opening of the positioning groove 99 is slightly smaller than the diameter of the positioning ball 96 to prevent the positioning ball 96 from sliding out of the positioning groove 99 as a whole.

[0136] When the blade 4 is mounted on the blade mounting plate 3, the positioning spring 97 is in a normal shape, the positioning ball 96 protrudes outside the pin 95, and the pin 95 passes through the blade 4 and the blade mounting plate 3 at the same time. Since the blade clamp 43 is inserted into the blade mounting plate clamp 35, and the blade mounting plate clamp 34 is inserted into the blade clamp 44, the blade 4 is locked on the blade mounting plate 3 at this time, so that the cutting tool described in this embodiment can be used normally. The specific method of use is the same as that of the blade-fixed pipe cutting knife, which will not be repeated here.

[0137] When the blade 4 is damaged and needs to be replaced, the user only needs to press the positioning ball 96 to compress the positioning spring 97, and the positioning ball 96 will be completely retracted into the positioning groove 99. At this time, the user can pull out the pin 95 and then pull the blade 4 out toward the spine 41, and then install the spare blade into the blade mounting plate 3, insert the pin 95, and lock the newly installed spare blade on the blade mounting plate 3 again, so that the cutting tool can be used normally, completing the entire blade replacement process.

[0138] The beneficial effect of this embodiment is that it provides a cutting tool with replaceable blades, which can realize quick replacement of blades and is simple to operate and easy to use; it has low requirements on hands-on ability and ordinary users can replace the blades, which can effectively extend the overall service life of the cutting tool.

[0139] Example 3

[0140] This embodiment provides a cutting tool with a replaceable blade, including most of the technical features of the embodiment 1, and only the features of the cutting structure are different, such as Figures 19-20 As shown, the cutting structure is composed of a blade mounting plate 3, a blade 4, a first clamping plate 7, and a second clamping plate 8.

[0141] The blade mounting plate 3 is rotatably mounted to the first hand-held part 1 ; the blade 4 is detachably mounted to the blade mounting plate 3 .

[0142] like Figures 21 to 24 As shown, the blade mounting plate 3 includes a blade mounting plate body 31, a blade 4 is mounted on its front end, and an arc plate 32 is provided at its rear end. The arc plate 32 is a part of the ratchet, and the arc plate 32 includes an arc edge portion and a non-arc edge portion. The side wall of the arc plate 32 includes an arc side wall and a non-arc side wall. The arc side wall of the arc plate 32 is provided with a plurality of equally spaced gear teeth 321, and a gear tooth gap 322 is formed between any two adjacent gear teeth 321, so that the first buckle 15 or the second buckle 25 provided in the second hand-held portion opening cavity 23 can be inserted into any gear tooth gap 322. The blade mounting plate 3 includes a blade mounting plate through hole 33, and the blade mounting plate 3 can rotate with the central axis of the blade mounting plate through hole 33 as the rotation axis.

[0143] The blade mounting plate 3 and the blade 4 are both provided with a plurality of clamping blocks and clamping openings, which cooperate with each other to form a corresponding clamping structure, so that the blade mounting plate 3 and the blade 4 are assembled as a whole and remain relatively stable.

[0144] In this embodiment, the blade mounting plate 3 includes a first blade mounting plate block 311, a second blade mounting plate block 312, and a third blade mounting plate block 313. The first blade mounting plate block 311 is disposed at the front end of the blade mounting plate body 31; the second blade mounting plate block 312 is disposed in the middle of the blade mounting plate body 31, corresponding to the blade spine 41; the third blade mounting plate block 313 is disposed in the middle of the blade mounting plate body 31, corresponding to the blade edge 42.

[0145] The blade mounting plate 3 also includes a first blade mounting plate snap-in 314 and a second blade mounting plate snap-in 315; the first blade mounting plate snap-in 314 is arranged between the first blade mounting plate block 311 and the locking member 93; the second blade mounting plate snap-in 315 is arranged between the second blade mounting plate block 312 and the third blade mounting plate block 313.

[0146] The blade 4 includes a blade spine portion 41 and a blade edge portion 42 that are integrally arranged, and further includes a first blade clamping block 411 , a second blade clamping block 412 , a first blade clamping opening 413 , a second blade clamping opening 414 and a third blade clamping opening 415 .

[0147] The first blade clamping block 411 protrudes from the top of the blade spine 41 and is clamped into the first clamping hole 314 of the blade mounting plate; the second blade clamping block 412 protrudes from the rear end of the blade spine 41 and is clamped into the second clamping hole 315 of the blade mounting plate.

[0148] The first blade opening 413 is provided at the front end of the blade spine 41; the first blade mounting plate block 311 is inserted into the first blade opening 413 and is tangent to the first blade opening 411. The second blade opening 414 is provided at the rear end of the blade spine 41; the second blade mounting plate block 312 is inserted into the second blade opening 414. The third blade opening 415 is provided at the rear end of the blade edge 42; the third blade mounting plate block 313 is inserted into the third blade opening 415 and is tangent to the second blade opening 414.

[0149] The blade mounting plate 3 includes an elastic member mounting notch 316 and a locking member mounting notch 317. The elastic member mounting notch 316 is connected to the first bayonet 314 of the blade mounting plate for mounting the elastic member; the locking member mounting notch 317 is connected to the elastic member mounting notch 316 for mounting the locking key.

[0150] The blade 4 includes a blade locking block 416 and a blade locking slot 417 . The blade locking block 416 protrudes backward from the first blade block 411 . The blade locking slot 417 is surrounded by the blade locking block 416 , the first blade block 411 and the blade spine 41 .

[0151] The cutting tool of this embodiment further includes a locking member 93 and a fourth elastic member 94. The locking member 93 includes an integrally arranged locking rod 931 and a locking block 932. The locking rod 931 slides in the locking member installation notch 316, and its front end is snapped into the blade locking bayonet 417; the locking block 932 is connected to the middle of the locking rod 931 and slides in the elastic member installation notch 316. The locking member 93 is used to lock the blade 4 on the blade installation plate 3. When the locking member 93 is slid, the blade 4 can be taken out from the blade installation plate 3 by the user. The fourth elastic member 94 is arranged in the elastic member installation notch 316. One end of the fourth elastic member 94 is connected to the side wall of the locking block 932, and the other end is connected to the inner side wall of the elastic member installation notch 316. The fourth elastic member 94 is preferably a spiral spring. The fourth elastic member 94 enables the locking member 93 to lock the blade in a normal state, so that the locking member 93 can slide in the locking member installation notch 317 under the action of an external force.

[0152] like Fig.19 , Fig.24 As shown, the first clamping plate 7 is provided with a first control hole 74, which is arranged opposite to the locking block 932; the locking block 932 is provided with a protruding third toggle member 933 on the side facing the first clamping plate 7; the third toggle member 933 passes through the first control hole 74. The second clamping plate 8 is provided with a second control hole 84, which is arranged opposite to the front end of the locking rod 931; the front end of the locking rod 931 is provided with a protruding fourth toggle member 934 on the side facing the second clamping plate 8; the fourth toggle member 934 passes through the second control hole 84. The third toggle member 933 and the fourth toggle member 934 are respectively arranged on both sides of the blade mounting plate 3, exposed to the outside of the blade mounting plate 3 and the first hand-held part 1, so that the user can toggle the locking member 93 from any direction on both sides of the blade mounting plate 3, so that the locking member 93 slides in the locking member mounting notch 317.

[0153] The first clamping plate 7 includes a first clamping plate arc plate 75, a first clamping plate gear 76 and a first clamping plate gear gap 77. The first clamping plate arc plate 75 is arranged at the rear end of the first clamping plate 7, and the first clamping plate arc plate 75 is a part of the ratchet; the first clamping plate gear 76 is arranged on the arc-shaped side wall of the first clamping plate arc plate 75; the first clamping plate gear gap 77 is arranged between any two adjacent first clamping plate gear teeth 76. The second clamping plate 8 includes a second clamping plate arc plate 85, a second clamping plate gear 86 and a second clamping plate gear gap 87. The second clamping plate arc plate 85 is arranged at the rear end of the second clamping plate 8, and is a part of the ratchet; the second clamping plate gear 86 is arranged on the arc-shaped side wall of the second clamping plate arc plate 85; the second clamping plate gear gap 87 is arranged between any two adjacent second clamping plate gear teeth 86. The first clamping plate arc plate 75 and the second clamping plate arc plate 85 have the same shape and size as the arc plate 32 of the blade mounting plate 3, and the first clamping plate gear gap 77 and the second clamping plate gear gap 87 have the same shape and corresponding position as the gear gap 322 of the blade mounting plate 3. When the first buckle 15 or the second buckle 25 of the second hand-held part 23 is inserted into any gear gap 322, it will also be inserted into the first clamping plate gear gap 77 or the second clamping plate gear gap 87.

[0154] During operation of this embodiment, when the blade 4 is mounted on the blade mounting plate 3, the fourth elastic member 94 is slightly deformed, and the front end of the locking rod 931 is inserted into the blade locking slot 417. Since the first clamping block 411 of the blade is inserted into the first clamping block 314 of the blade mounting plate, and the second clamping block 412 of the blade is inserted into the second clamping block 315 of the blade mounting plate, the blade 4 is locked on the blade mounting plate 3 at this time, so that the cutting tool described in this embodiment can be used normally. The specific method of use is the same as that of the fixed-blade pipe cutting knife, which will not be repeated here.

[0155] When the blade 4 is damaged and needs to be replaced, the third toggle member 933 or the fourth toggle member 934 is toggled, the fourth elastic member 94 is compressed, and then deformed, and the front end of the locking rod 931 disengages from the blade locking slot 417. At this time, the user can pull out the blade 4 of the blade mounting plate 3 toward the blade edge portion 42, and then install the spare blade into the blade mounting plate 3, release the third toggle member 933 or the fourth toggle member 934, so that the front end of the locking rod 931 is inserted into the blade locking slot 417 under the action of the fourth elastic member 94, and the newly installed spare blade is locked on the blade mounting plate 3 again, so that the cutting tool can be used normally, completing the entire blade replacement process.

[0156] The beneficial effect of this embodiment is that it provides a cutting tool with replaceable blades, which can realize quick replacement of blades and is simple to operate and easy to use; it has low requirements on hands-on ability and ordinary users can replace the blades, which can effectively extend the overall service life of the cutting tool.

[0157] Example 4

[0158] like Fig.25 As shown, this embodiment provides a cutting tool with a replaceable blade, comprising a first handheld portion 1, a second handheld portion 2, and a ratchet blade 5. The ratchet blade 5 refers to a blade whose side wall is partially designed to be in the shape of a ratchet. The ratchet blade 5 comprises an arc plate 52, which is a part of the ratchet. The arc plate 52 is provided with a plurality of evenly distributed gear teeth 521 on its arc side wall, and a gear tooth gap 522 is formed between any two adjacent gear teeth 521. In this embodiment, the ratchet blade 5 is used to replace the blade mounting plate 3 and the blade 4 in Embodiments 1, 2 or 3, and the structure of the ratchet blade 5 is similar to the structure formed by the combination of the blade mounting plate 3 and the blade 4.

[0159] like Figures 26 to 29 As shown, the first hand-held portion 1 includes a first hand-held portion first side wall 11 and a first hand-held portion second side wall 12 which are opposite to each other and integrally arranged. The first hand-held portion first side wall 11 and the first hand-held portion second side wall 12 form a first hand-held portion opening cavity 13. The first hand-held portion opening cavity 13 includes a first hand-held portion first opening 131 and a first hand-held portion second opening 132. The first hand-held portion first opening 131 faces the direction of the second hand-held portion 2; the first hand-held portion second opening 132 faces the outside of the first hand-held portion 1; a portion of the ratchet blade 5 is located in the first hand-held portion opening cavity 13.

[0160] This embodiment further includes a first pin 14, a first buckle 15 and a first elastic member 16. The first pin 14 is vertically mounted on the inner sides of the two side walls 11 and 12 of the first hand-held part 1; the first hand-held part 1 and the second hand-held part 2 are rotatably mounted on the first pin 14. The rear end of the first buckle 15 is rotatably mounted on the first pin 14, and its front end is engaged with any gear tooth gap. One end of the first elastic member 16 is connected to the first hand-held part 1, and the other end is connected to the first buckle 15. In this embodiment, the first elastic member 16 is preferably a tension spring.

[0161] The first hand-held part 1 is mounted with a ratchet blade 5 at one end, and further includes a first arc groove 17 and a second arc groove 18. The first arc groove 17 is arranged at the edge of the first side wall 11 of the first hand-held part; the second arc groove 18 is arranged at the edge of the second side wall 12 of the first hand-held part, and is arranged opposite to the first arc groove 17; the first arc groove 17 and the second arc groove 18 are respectively arranged on both sides of the opening of the first hand-held part opening 13, and the two arc grooves are used to place and fix the pipe to realize the pipe cutting function. The blade of the ratchet blade 5 is facing the first hand-held part opening 13, and after the cutting process is completed, the blade falls into the first hand-held part opening 13.

[0162] The second hand-held part 2 is rotatably connected to the first hand-held part 1, and the second hand-held part 2 includes a second hand-held part first side wall 21 and a second hand-held part second side wall 22 that are opposite to each other and integrally arranged, and the second hand-held part first side wall 21 and the second hand-held part second side wall 22 form a second hand-held part opening cavity 23, and the opening direction of the second hand-held part opening cavity 23 faces the first hand-held part 1.

[0163] This embodiment further includes a second pin 24, a second buckle 25 and a second elastic member 26. The second pin 24 is vertically mounted on the inner sides of the two side walls 21 and 22 of the second hand-held part 2. The rear end of the second buckle 25 is rotatably mounted on the second pin 24, and the front end thereof is engaged with any gear tooth gap; one end of the second elastic member 16 is connected to the second hand-held part 2, and the other end thereof is connected to the second buckle 25. The second elastic member 26 is preferably a torsion spring, which is mounted on the second pin 24, one end of which is connected to the first hand-held part 1, and the other end thereof is detachably connected to the second buckle 25.

[0164] In this embodiment, the first buckle 15 or the second buckle 25, under the action of the first elastic member 16 or the second elastic member 26, clamps the gear tooth gap at an appropriate position. During the pipe cutting process, the two buckles can assist the blade to exert force to cut the pipe located between the ratchet blade 5 and the two arc-shaped grooves 17 and 18, thereby achieving a labor-saving effect.

[0165] The present embodiment further comprises a detachable pin 6, which is arranged at the connection between the first hand-held part 1 and the ratchet blade 5. The first hand-held part 1 and the ratchet blade 5 can rotate around the detachable pin 6, so that the cutting tool described in the present embodiment can be used normally. The specific method of use is the same as that of the fixed-blade pipe cutting knife, which will not be repeated here.

[0166] The first hand-held portion first side wall 11 is provided with a first hand-held portion first side wall through hole 111; the first hand-held portion second side wall 12 is provided with a first hand-held portion second side wall through hole 121, the ratchet blade 5 is provided with a blade through hole 54, the detachable pin 6 passes through the first hand-held portion first side wall through hole 111, the blade through hole 54 and the first hand-held portion second side wall through hole 121 in sequence, and the ratchet blade 5 is rotatably connected to the first hand-held portion 1 through the detachable pin 6.

[0167] like Fig.30 As shown, the detachable pin shaft 6 includes a hollow shaft 61 and a rotating member 62 which are combined together, and the rotating member 62 is detachably assembled to the hollow shaft 61 .

[0168] The hollow shaft 61 includes an integrally formed hollow shaft sleeve 611 and a shaft sleeve base 612. The hollow shaft sleeve 611 passes through the first side wall through hole 111 of the first hand-held part, the blade through hole 54 and the second side wall through hole 121 of the first hand-held part in sequence; the shaft sleeve base 612 is exposed outside the first side wall 11 of the first hand-held part.

[0169] The rotating member 62 includes an integrally formed rotating shaft 621 and a rotating shaft base 622 . The rotating shaft 621 is inserted into and threadedly connected to the hollow sleeve 611 . The rotating shaft base 622 is exposed outside the second side wall 12 of the first hand-held portion, and its outer surface is provided with a straight or cross-shaped groove.

[0170] like Fig.31 As shown, the ratchet blade 5 refers to a blade whose side wall is partially designed to be in the shape of a ratchet, including a cutting portion 51, an arc plate 52 and a connecting portion 53. This embodiment is opened or closed in the use state, and the first hand-held portion 1 and the second hand-held portion 2 rotate relative to each other. The arc plate 32 of the ratchet blade 5 cooperates with the first buckle 15 and the second buckle 25, so that the cutting portion 51 can achieve an effective cutting operation, which will not be described here. The cutting portion 51 is arranged at the front end of the ratchet blade 5 to cut an object. The cutting portion 51 includes a blade spine 511 and a blade portion 512, and the blade spine 511 faces the outside of the first hand-held portion 1; the blade portion 512 faces the second opening 132 of the first hand-held portion, and the blade portion 512 is straight or arc-shaped. When the first hand-held portion 1 and the second hand-held portion 2 are closed, the blade portion 512 is used to cut the pipe.

[0171] The arc plate 52 is disposed at the rear end of the ratchet blade 5. The arc plate 52 is designed as a part of the ratchet and includes gear teeth 521 and gear tooth gaps 522. The gear teeth 521 are disposed on the arc-shaped side wall of the arc plate 52. The gear tooth gaps 522 are disposed between any two adjacent gear teeth 521. The second hand-held portion 12 is provided with a first buckle 15 and / or a second buckle 25 on the side facing the first hand-held portion 11, which are engaged with any gear tooth gap 522.

[0172] The connecting portion 53 is disposed between the cutting portion 51 and the arc plate 52 and is rotatably connected to the first hand-held portion 11. The connecting portion 53 includes a connecting portion slot 531 which is recessed in the side wall of the connecting portion 53 and is inserted by one end of the third elastic member 19.

[0173] like Fig.29 As shown, the present embodiment further includes a third elastic member 19, one end of which is connected to the first hand-held portion 1, and the other end of which is connected to the ratchet blade 5. The third elastic member 19 is preferably a torsion spring, such as a double torsion spring, which is sleeved on a torsion spring installation shaft 20, and the two ends of the torsion spring installation shaft 20 are vertically fixed to the inner sides of the two side walls 11 and 12 of the first hand-held portion 1. One end of the third elastic member 19 is fixed to the first hand-held portion 1, and the other end of the third elastic member 19 is connected to the ratchet blade 5. In the present embodiment, the third elastic member 19 is inserted into the connecting portion slot 531 of the ratchet blade 5.

[0174] In this embodiment, during the opening or closing of the first hand-held part 1 and the second hand-held part 2, the third elastic member 19 assists in exerting force or limits the rotation range of the blade, thereby ensuring that the opening angle is within an appropriate range, preventing damage to components, and reducing safety risks during use.

[0175] like Fig.25 As shown, a hand-held fixing device 27 is provided at the end of the second hand-held part 2, one end of which is hinged to the end of the second hand-held part 2, and the other end of which is detachably mounted to the end of the first hand-held part 1 to close the first hand-held part 1 and the second hand-held part 2.

[0176] When the ratchet blade 5 is damaged and needs to be replaced, the user can use a hand-held tool such as a screwdriver to remove the rotating member 62 from the hollow shaft 61, so that the detachable pin 6 can be removed from the first hand-held part 1, and the ratchet blade 5 can be separated from the first hand-held part 1, so that the user can replace the spare blade by himself, and the spare blade is exactly the same shape and size as the original ratchet blade 5. During the installation of the spare blade, the spare blade is placed in the first hand-held part 1, so that the blade through hole 54 of the spare blade is located on the same straight line as the first side wall through hole 111 of the first hand-held part and the second side wall through hole 121 of the first hand-held part. Afterwards, the user passes the hollow shaft 61 through the first side wall through hole 111 of the first hand-held part, the blade through hole 54 and the second side wall through hole 121 of the first hand-held part in sequence, and then connects to the rotating member 62. The user can use a hand-held tool such as a screwdriver to install the rotating member 62 to the hollow shaft 61 so that the two are relatively fixed.

[0177] The beneficial effect of this embodiment is that a cutting tool with a replaceable blade is provided, and the ratchet blade is assembled to the first hand-held part by using a detachable pin shaft, so that the ratchet blade can be easily and quickly separated from the first hand-held part, thereby realizing the replacement of the ratchet blade. This embodiment is simple to operate and easy to use, and has low requirements on the user's manual ability. Ordinary users can perform the operation of replacing the blade, which can effectively extend the service life of the cutting tool as a whole.

[0178] Example 5

[0179] This embodiment provides a cutting tool with a replaceable blade, such as Fig.32 As shown, it comprises a first hand-held part 1 , a second hand-held part 2 and two or more ratchet blades 5 , which are rotatably mounted to the first hand-held part 11 by means of a detachable pin 6 .

[0180] Embodiment 5 includes most of the technical features of Embodiment 4, and its distinguishing technical features are as follows: Figures 32-36As shown, in Example 5, the detachable pin shaft 6 includes a nut 63 and a screw 64, the nut 63 is exposed on the outside of the first side wall 11 of the first hand-held portion; the screw 64 passes through the first side wall through hole 111 of the first hand-held portion, the blade through hole 54 and the second side wall through hole 112 of the first hand-held portion in sequence, and its front end is inserted into and threadedly connected to the nut 63, and its rear end is provided with a screw base 65; the screw base 65 is exposed on the outside of the second side wall 12 of the first hand-held portion, and its outer surface is provided with a straight or cross-shaped groove.

[0181] The ratchet blade 5 refers to a blade with a part of the side wall designed in a ratchet shape, including a cutting portion 51, an arc plate 52 and a connecting portion 53. Another technical feature that distinguishes Example 5 from Example 4 is that the arc plate 52 includes an arc plate clamping hole 523 that passes through one end of the arc plate 52 and is clamped by one end of the third elastic member 19.

[0182] like Fig.33 As shown, this embodiment includes two ratchet blades 5 of the same shape and adjacent to each other, both of which are sleeved on a detachable pin 6, and the two maintain a relative deflection state, and the deflection angle is 90 to 150 degrees, preferably 120 degrees. The arc plate clamping hole 523 of one ratchet blade 5 is arranged at the left end of the arc plate 52, and the arc plate clamping hole 523 of the other ratchet blade 5 is arranged at the right end of the arc plate 52, and one end of the third elastic member 19 passes through the two arc plate clamping holes 523 at the same time, so that the two ratchet blades 5 are relatively fixed.

[0183] In this embodiment, the third elastic member 19 is preferably a torsion spring, which is sleeved on a torsion spring mounting shaft 20, one end of which is connected to the first hand-held portion 1, and the other end of which is simultaneously inserted into the two arc-shaped plate clamping holes 532 of the two ratchet blades 5. In this embodiment, during the opening or closing process of the first hand-held portion 1 and the second hand-held portion 2, the third elastic member 19 assists in exerting force or limits the rotation range of the ratchet blade 5, which can prevent damage to the components and reduce safety risks during use.

[0184] Other technical solutions and technical effects of this embodiment are the same as or similar to those of Embodiment 4 and will not be elaborated here.

[0185] When any ratchet blade 5 is damaged and needs to be replaced, the user can use a hand tool such as a screwdriver to remove the screw rod 64 from the nut 63, so that the detachable pin shaft 6 can be removed from the first handheld part 1, and then the two ratchet blades 5 can be separated from the first handheld part 1, so that the user can replace the spare blades by himself, and the spare blades are exactly the same in shape and size as the original ratchet blades 5. The spare blades are placed in the first handheld part 1, so that the blade through holes 54 of the two ratchet blades 5 are located on the same straight line as the first side wall through hole 111 of the first handheld part and the second side wall through hole 121 of the first handheld part. After that, the user sequentially passes the screw rod 64 through the first side wall through hole 111 of the first handheld part, the blade through hole 54 and the second side wall through hole 121 of the first handheld part, and then is threadedly connected to the nut 63. The user can use a hand tool such as a screwdriver to install the screw rod 64 to the nut 63, so that the two are relatively fixed.

[0186] The beneficial effect of this embodiment is that it provides a cutting tool with replaceable blades, and uses a detachable pin to assemble multiple ratchet blades to the first handheld part, so that the ratchet blades can be easily and quickly separated from the first handheld part, thereby realizing the replacement of the ratchet blades. This embodiment is simple to operate and easy to use, and has low requirements on the user's manual ability. Ordinary users can perform the operation of replacing blades, which can effectively extend the service life of the entire cutting tool.

[0187] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A cutting tool with a replaceable blade, characterized in that: include: First handheld part; A second hand-held portion, rotatably connected to the first hand-held portion; a cutting structure rotatably connected to the first handheld portion; The cutting structure comprises: The blade is configured to be removable, The arc plate is arranged opposite to the blade.

2. The cutting tool with replaceable blade according to claim 1, characterized in that: The arc plate is a part of the ratchet, and the arc plate includes Gear teeth, arranged on the arc-shaped side wall of the arc-shaped plate; as well as Tooth clearance is set between any two adjacent teeth; Wherein, the second hand-held part is provided with a first buckle and / or a second buckle on a side facing the first hand-held part, which is engaged with any gear tooth gap.

3. The cutting tool with replaceable blade according to claim 1, characterized in that: The cutting structure comprises a blade mounting plate, rotatably mounted to the first hand-held portion; Wherein, the blade mounting plate comprises a blade mounting plate body with the blade mounted at the front end, and the rear end of the blade mounting plate body forms the arc-shaped plate.

4. The cutting tool with replaceable blade according to claim 3, characterized in that: The blade mounting plate also includes at least one blade mounting plate block; as well as At least one blade mounting plate bayonet, the opening direction of which is toward the blade; The blade includes Spine of the blade; A blade portion, integrally arranged with the blade spine portion; At least one blade clamping block, clamped into the corresponding blade mounting plate clamping port; as well as At least one blade bayonet is snapped into a corresponding blade mounting plate block.

5. The cutting tool with replaceable blade according to claim 4, characterized in that: The blade mounting plate clamping block is arranged at the front end of the blade mounting plate body and connected to the middle part of the arc plate; The blade mounting plate bayonet is arranged between the blade mounting plate block and the arc-shaped plate; The blade block is arranged at the edge of the blade and is arranged opposite to the blade portion; and The blade clamping opening is arranged between the blade clamping block and the blade portion.

6. The cutting tool with replaceable blade according to claim 5, characterized in that: The blade mounting plate also includes A spring piece installation notch is provided on a side of the arc-shaped plate away from the arc-shaped side wall, and its opening direction faces the blade; The blade also includes The blade fixing bayonet is arranged opposite to the spring piece installation notch.

7. The cutting tool with replaceable blade according to claim 6, characterized in that: The shrapnel installation gap includes A first notch portion, the opening of which is located on a side of the arc-shaped plate away from the arc-shaped side wall; as well as The second notch portion is connected to the first notch portion and is vertically arranged with respect to the first notch portion.

8. The cutting tool with replaceable blade according to claim 4, characterized in that: The at least one blade mounting plate block comprises The first clamping block of the blade mounting plate is arranged at the front end of the blade mounting plate body; The second clamping block of the blade mounting plate is arranged in the middle of the blade mounting plate body and corresponds to the blade spine; The third clamping block of the blade mounting plate is arranged in the middle of the blade mounting plate body and corresponds to the blade portion; and The at least one blade mounting plate bayonet includes The first clamping opening of the blade mounting plate is arranged between the first clamping block of the blade mounting plate and the locking member; as well as A second clamping opening of the blade mounting plate is provided between the second clamping block of the blade mounting plate and the third clamping block of the blade mounting plate; and The at least one blade block comprises A first blade clamping block protrudes from the blade spine and is clamped into a first clamping opening of the blade mounting plate; A second blade clamping block protrudes from the blade spine and is clamped into a second clamping opening of the blade mounting plate; The at least one blade bayonet comprises The first blade snap-in is arranged at the front end of the blade spine; the first snap-in block of the blade mounting plate is snapped into the first blade snap-in and is tangent to the first blade snap-in block; The second blade snap-in is arranged at the rear end of the blade spine; the second snap-in block of the blade mounting plate is snap-fitted into the second blade snap-in; as well as The third clamping opening of the blade is arranged at the rear end of the blade portion; the third clamping block of the blade mounting plate is clamped into the third clamping opening of the blade and is tangent to the second clamping block of the blade.

9. The cutting tool with replaceable blade according to claim 8, characterized in that: The blade mounting plate also includes An elastic member installation notch connected to the first bayonet of the blade installation plate; and A locking member installation notch connected to the elastic member installation notch; The blade also includes A blade locking block protrudes from the first blade block; A blade locking bayonet, which is surrounded by the blade locking block, the blade first block and the blade spine; as well as The cutting tool with replaceable blades also includes The locking member comprises an integrally arranged locking rod and a locking block, wherein the locking rod slides in the locking member installation notch, and its front end is snapped into the blade locking bayonet; the locking block is connected to the middle of the locking rod and slides in the elastic member installation notch; as well as A fourth elastic member is disposed in the elastic member installation notch, one end of the fourth elastic member is connected to the side wall of the locking block, and the other end of the fourth elastic member is connected to the inner side wall of the elastic member installation notch.

10. The cutting tool with replaceable blade according to claim 3, characterized in that: The cutting structure also includes A first clamping plate, fitted and fixed to one side of the blade mounting plate; and The second clamping plate is fitted and fixed to the other side of the blade mounting plate; the connection between the blade and the blade mounting plate is clamped between the first clamping plate and the second clamping plate.

11. The cutting tool with replaceable blade according to claim 10, characterized in that: The first splint is provided with a first waist-shaped groove; and the second splint is provided with a second waist-shaped groove, and the second waist-shaped groove is arranged opposite to the first waist-shaped groove; The cutting structure also includes The toggle rod passes through the first waist-shaped groove, the spring piece installation notch and / or the blade fixing bayonet and the second waist-shaped groove in sequence; as well as The spring sheet is arranged in the spring sheet installation notch; one end of the spring sheet is fixed to the blade installation plate, and the other end thereof is tangent to the side wall of the toggle rod.

12. The cutting tool with replaceable blade according to claim 10, characterized in that: The cutting structure also includes A blade pin mounting hole passes through the blade and is located at a portion of the blade spine close to the blade mounting plate; A first clamping plate pin shaft mounting hole, which passes through the first clamping plate and is arranged opposite to the blade pin shaft mounting hole; A second clamping plate pin shaft mounting hole, which passes through the second clamping plate and is arranged opposite to the blade pin shaft mounting hole; A pin shaft passes through the second clamping plate pin shaft mounting hole, the blade pin shaft mounting hole and the first clamping plate pin shaft mounting hole in sequence, one end of the pin shaft is provided with a pin shaft cap, and the side wall of the other end thereof is provided with a concave positioning groove; A positioning ball, arranged at the opening of the positioning groove; as well as A positioning spring has one end connected to the bottom of the positioning groove and the other end connected to the positioning ball.

13. The cutting tool with replaceable blade according to claim 10, characterized in that: The cutting structure also includes a first control hole, passing through the first clamping plate; a second control hole, passing through the second clamping plate; a third toggle member, protruding from a side of the locking block facing the first clamping plate and passing through the first control hole; as well as The fourth toggle member protrudes from the side of the locking rod facing the second clamping plate and passes through the second control hole.

14. The cutting tool with replaceable blade according to claim 10, characterized in that: The first splint includes A first clamping plate arc-shaped plate, provided at the rear end of the first clamping plate, which is a part of the ratchet; First clamping plate gear teeth are arranged on the arc-shaped side wall of the first clamping plate arc-shaped plate; as well as The first clamping plate gear teeth gap is set between any two adjacent first clamping plate gear teeth; and / or The second splint includes A second clamping plate arc-shaped plate, provided at the rear end of the second clamping plate, which is a part of the ratchet; Second clamping plate gear teeth are provided on the arc-shaped side wall of the second clamping plate arc-shaped plate; and The second clamping plate gear teeth gap is set between any two adjacent second clamping plate gear teeth.

15. The cutting tool with replaceable blade according to claim 1, characterized in that: The blade is integrally formed with the arc-shaped plate to form a ratchet blade.

16. The cutting tool with replaceable blade according to claim 15, characterized in that: The cutting structure also includes A detachable pin is arranged at the connection between the first hand-held part and the ratchet blade, and the first hand-held part and the ratchet blade can rotate around the detachable pin.

17. The cutting tool with replaceable blade according to claim 16, characterized in that: The cutting structure also includes A through hole on the first side wall of the first hand-held portion, penetrating through the first side wall of the first hand-held portion; A through hole on the second side wall of the first gripping portion, penetrating the second side wall of the first gripping portion; and A blade through hole, passing through the ratchet blade; Wherein, the detachable pin shaft passes through the first side wall through hole of the first hand-held part, the blade through hole and the second side wall through hole of the first hand-held part in sequence.

18. The cutting tool with replaceable blade according to claim 17, characterized in that: The detachable pin comprises The hollow shaft includes an integrally formed A hollow sleeve, passing through the first side wall through hole of the first hand-held part, the blade through hole and the second side wall through hole of the first hand-held part in sequence; and A sleeve base, exposed outside the first side wall of the first hand-held portion; as well as The rotating member includes an integrally formed A rotating shaft is inserted into and threadedly connected to the hollow sleeve; and The rotating shaft base is exposed outside the second side wall of the first hand-held part, and a straight or cross-shaped groove is arranged on its outer surface.

19. The cutting tool with replaceable blade according to claim 17, characterized in that: The detachable pin comprises A nut exposed outside the first side wall of the first grip portion; and The screw rod passes through the first side wall through hole of the first hand-held part, the blade through hole and the second side wall through hole of the first hand-held part in sequence, and its front end is threadedly connected to the nut, and its rear end is provided with a screw rod base; the screw rod base is exposed to the outside of the second side wall of the first hand-held part, and its outer surface is provided with a straight or cross-shaped groove.

20. The cutting tool with a replaceable blade according to claim 15, wherein: The number of the ratchet blades is two, and the two ratchet blades maintain relative deflection.

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