Transmission structure for trephine and trephine

Abstract

The utility model discloses a transmission structure for a trephine, which comprises a driving main shaft, a V-shaped groove transmission wheel and a positioning block, the V-shaped groove transmission wheel is sleeved on the driving main shaft in a sliding fit mode along the axial direction of the driving main shaft, and the positioning block is fixedly connected with the driving main shaft. A trephine is also disclosed. According to the utility model, the floatable V-shaped groove transmission wheel is matched with the saw blade, the V-shaped groove transmission wheel is coaxially sleeved on the driving main shaft, and the V-shaped groove transmission wheel is in sliding fit with the positioning block in a plug pin and jack connection mode, so that the V-shaped groove transmission wheel can float relative to the axial direction of the driving main shaft while being driven by the rotation of the driving main shaft; therefore, the V-shaped groove transmission wheel is endowed with the error adjusting capacity within a certain range, and when the position of the inner ring is changed when the saw blade rotates due to part errors, assembly errors and deformation errors, the V-shaped groove transmission wheel and the saw blade can be well matched through floating of the V-shaped groove transmission wheel.

Description

Technical Field

[0001] The utility model belongs to the field of electric tools and relates to a transmission structure for a ring saw and the ring saw. Background Art

[0002] A ring saw is a device used for cutting. Its main structure includes a ring saw blade, a power motor for driving rotation, and a transmission structure. Existing ring saw machine products usually use a transmission wheel to drive the ring saw blade. The transmission wheel and the ring saw blade are fixed in position and then driven to rotate by a motor.

[0003] However, as a multi-part assembly structure, the ring saw machine is subject to inevitable processing and assembly errors of each part. In addition, the ring saw is subjected to high intensity use, and deformation of parts during long-term use is inevitable, which will further expand the assembly error. All these will affect the coordination effect between the transmission wheel and the ring saw blade. In particular, when the transmission wheel and the ring saw blade are set in a fixed position, various errors will lead to poor engagement or even separation between the two, affecting the cutting work and even causing danger in serious cases. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a transmission structure for a ring saw and the ring saw.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A transmission structure for a ring saw includes a drive spindle, a V-groove transmission wheel and a positioning block. The V-groove transmission wheel is slidably mounted on the drive spindle along the axial direction of the drive spindle. The positioning block is fixedly connected to the drive spindle. The positioning block is cooperatively connected to the V-groove transmission wheel to limit the rotation of the V-groove transmission wheel relative to the drive spindle.

[0007] Furthermore, a socket is provided on the V-groove transmission wheel, the axis of the socket is arranged parallel to the axis of the driving spindle, and the positioning block is provided with a pin for passing through the socket.

[0008] Furthermore, a flange is provided on the outer circumference of the driving main shaft, and a set distance is formed between the flange and the positioning block in the axial direction of the driving main shaft, and the distance is greater than the thickness of the V-groove transmission wheel.

[0009] Furthermore, a boss is provided on the positioning block, and a slot for engaging with the boss is provided at one axial end of the driving spindle; a fastening bolt is also included, which passes through the positioning block and is threadedly connected to the driving spindle, and the fastening bolt abuts against the positioning block.

[0010] A ring saw comprises a casing, a power assembly, a protective cover, a saw blade and a transmission structure for the ring saw, wherein the power assembly is arranged in the casing, the power assembly is used to drive the rotation of the drive spindle, the protective cover is arranged at one end of the casing, one end of the saw blade is arranged in the protective cover, and the V-groove transmission wheel is clamped with the inner ring of the saw blade.

[0011] Furthermore, a V-shaped groove is provided on the outer circumference of the V-groove transmission wheel, and the inner wall of the V-shaped groove abuts against the saw blade.

[0012] In summary, the benefits of the present invention are:

[0013] The utility model adopts a floating V-groove transmission wheel to cooperate with the saw blade. The V-groove transmission wheel is coaxially sleeved on the driving spindle and forms a sliding cooperation with the positioning block in the form of a pin-and-hole connection, so that the V-groove transmission wheel can float relative to the axial direction of the driving spindle while being driven by the driving spindle, thereby giving the V-groove transmission wheel the ability to adjust errors within a certain range. When the position of the inner ring changes when the saw blade rotates due to part error, assembly error and deformation error, the floating of the V-groove transmission wheel can maintain good cooperation between the V-groove transmission wheel and the saw blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the ring saw equipment of the present utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the structure of a saw blade and a transmission structure.

[0016] Figure 3 for Figure 2 Schematic diagram of the exploded structure of a transmission structure.

[0017] Figure 4 for Figure 3 Schematic diagram of the disassembled structure from another perspective.

[0018] Markings in the figure: 1. Casing; 2. Handle; 3. Protective cover; 31. Guide wheel; 4. Saw blade; 51. Driving spindle; 512. Boss; 511. Flange; 52. V-groove drive wheel; 521. Socket; 53. Positioning block; 532. Slot; 531. Latch; 54. Fastening bolt. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the component layout type may also be more complicated.

[0021] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0023] The utility model provides a transmission structure for a ring saw, which is mainly used for power transmission between a saw blade 4 and a power component in the ring saw.

[0024] Reference Figure 1 The ring saw device includes a casing 1, a handle 2, a power assembly, a protective cover 3 and a saw blade 4. The protective cover 3 is an arc-shaped flared structure and is arranged at one end of the casing 1. The handle 2 is arranged at the other end of the casing 1 for the user to hold. The saw blade 4 is arranged in the flared opening of the protective cover 3, and the installation support and movement direction guidance of the saw blade 4 are achieved by a guide wheel group arranged in the protective cover 3.

[0025] Among them, reference Figure 2The saw blade 4 has an annular structure. The guide wheel group includes two relatively arranged guide wheels 31 and guide shafts respectively provided on the two guide wheels 31. The guide shafts are fixedly connected to the protective cover 3. The guide wheels 31 are coaxially arranged with the guide shafts, and the guide wheels 31 can rotate around the guide shafts. The two guide shafts are arranged parallel to each other, so that a gap for arranging the saw blade 4 is formed between the two guide wheels 31. One side of the saw blade 4 is arranged through the gap, so that the two side surfaces of the saw blade 4 are respectively against the outer circumferential surfaces of the two guide wheels 31. When the saw blade 4 rotates, the two guide wheels 31 rotate synchronously, thereby limiting the rotation plane of the saw blade 4 and avoiding axial movement of the saw blade 4 when it rotates.

[0026] An annular protrusion is coaxially provided on the outer periphery of the guide wheel 31, and an annular groove is provided on the surface of the saw blade 4 with the center of the saw blade 4 as the center. When the guide wheel 31 and the saw blade 4 are set, the annular protrusion is embedded in the annular groove, thereby forming a radial limit for the saw blade 4 to prevent the saw blade 4 from escaping from the gap.

[0027] The power assembly includes a drive motor arranged in the casing 1 and a drive spindle 51 arranged on one side of the protective cover 3. The drive spindle 51 and the output shaft of the drive motor are connected through a transmission structure, so that the drive motor can directly drive the rotation of the drive spindle 51.

[0028] The transmission structure is provided on the driving spindle 51, referring to Figure 3 and Figure 4 The transmission structure includes a V-groove transmission wheel 52, a positioning block 53 and a fastening bolt 54, wherein the V-groove transmission wheel 52 is coaxially sleeved on the outer periphery of the driving spindle 51, and the outer periphery of the V-groove transmission wheel 52 is provided with a V-shaped groove along the circumferential ring, so that when the V-groove transmission wheel 52 is set in a tangent position to the inner periphery of the saw blade 4, the inner peripheral edge of the saw blade 4 can be embedded in the groove and form a certain friction force with the inner wall of the groove. When the V-groove transmission wheel 52 is driven to rotate, it can drive the saw blade 4 to rotate.

[0029] The positioning block 53 is arranged at one axial end of the driving spindle 51, and a boss 532 is provided on the positioning block 53. A corresponding groove 512 for engaging with the boss 532 is provided on the driving spindle 51, thereby limiting the circumferential rotation between the positioning block 53 and the driving spindle 51 after the positioning block 53 and the driving spindle 51 are engaged. The fastening bolt 54 passes through the positioning block 53 and is threadedly connected to the driving spindle 51, and the fastening bolt 54 is pressed against the positioning block 53, so that the positioning block 53 is pressed against the driving spindle 51 when tightened, thereby achieving fixation between the driving spindle 51 and the positioning block 53.

[0030] Furthermore, a flange 511 is circumferentially provided on the outer periphery of the driving main shaft 51, and a set spacing is formed between the flange 511 and the positioning block 53 in the axial direction of the driving main shaft 51. The spacing is greater than the thickness of the V-groove transmission wheel 52, so that the V-groove transmission wheel 52 can float within the range of the spacing along the axial direction of the driving main shaft 51.

[0031] The V-groove transmission wheel 52 and the driving main shaft 51 form a spline connection, so that when the driving main shaft 51 rotates, the rotation of the V-groove transmission wheel 52 can be synchronously driven without affecting the axial movement of the V-groove transmission wheel 52 relative to the driving main shaft 51. In one embodiment, a key can be directly set on the outer wall of the driving main shaft 51, and a key groove can be set on the inner periphery of the V-groove transmission wheel 52 to realize the spline connection.

[0032] In another embodiment, one or more insertion holes 521 are provided through the V-groove transmission wheel 52, and the insertion direction of the insertion hole 521 is arranged parallel to the axial direction of the driving main shaft 51. One or more pins 531 for being inserted into the insertion hole 521 are correspondingly provided on the positioning block 53. The pins 531 and the insertion hole 521 form a clearance fit, so that the V-groove transmission wheel 52 can move relative to the pins 531. Through the arrangement of the pins 531 and the insertion hole 521, the positioning block 53 and the V-groove transmission wheel 52 form a circumferential limit fixation. When the driving spindle 51 drives the positioning block 53 to rotate, the positioning block 53 can synchronously drive the rotation of the V-groove transmission wheel 52, and the setting of the socket 521 and the pin 531 also supports the axial floating action of the V-groove transmission wheel 52 between the flange 511 and the positioning block 53. Therefore, when the error of the saw blade 4 itself and the assembly error of each component cause the error in the matching position of the saw blade 4 and the V-groove transmission wheel 52, the floating of the V-groove transmission wheel 52 can effectively eliminate the influence of the error, ensuring that the cutting groove can fully cooperate with the saw blade 4.

[0033] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A transmission structure for a ring saw, characterized in that: The invention comprises a driving main shaft (51), a V-groove transmission wheel (52) and a positioning block (53), wherein the V-groove transmission wheel (52) is sleeved on the driving main shaft (51) in a sliding manner along the axial direction of the driving main shaft (51), the positioning block (53) is fixedly connected to the driving main shaft (51), and the positioning block (53) is cooperatively connected to the V-groove transmission wheel (52) to limit the rotation of the V-groove transmission wheel (52) relative to the driving main shaft (51).

2. A transmission structure for a ring saw according to claim 1, characterized in that: The V-groove transmission wheel (52) is provided with a socket (521), the axis of the socket (521) is arranged parallel to the axis of the driving main shaft (51), and the positioning block (53) is provided with a latch (531) for passing through the socket (521).

3. A transmission structure for a ring saw according to claim 1 or 2, characterized in that: The outer circumference of the driving main shaft (51) is provided with a flange (511), and the flange (511) and the positioning block (53) form a set spacing in the axial direction of the driving main shaft (51), and the spacing is greater than the thickness of the V-groove transmission wheel (52).

4. The transmission structure for a ring saw according to claim 1, characterized in that: The positioning block (53) is provided with a boss (532), and one axial end of the driving main shaft (51) is provided with a slot (512) for engaging with the boss (532); and further comprises a fastening bolt (54), which is passed through the positioning block (53) and is threadedly connected to the driving main shaft (51), and the fastening bolt (54) abuts against the positioning block (53).

5. A ring saw, characterized in that: The ring saw comprises a housing (1), a power assembly, a protective cover (3), a saw blade (4) and a transmission structure for the ring saw according to any one of claims 1 to 4, wherein the power assembly is arranged in the housing (1), the power assembly is used to drive the rotation of the driving spindle (51), the protective cover (3) is arranged at one end of the housing (1), one end of the saw blade (4) is arranged in the protective cover (3), and the V-groove transmission wheel (52) is clamped with the inner ring of the saw blade (4).

6. A ring saw according to claim 5, characterized in that: The outer circumference of the V-groove transmission wheel (52) is provided with a V-groove, and the inner wall of the V-groove abuts against the saw blade (4).

Images