A high-precision hand saw assembly with auxiliary deviation prevention

Abstract

The application discloses a kind of high-precision hand saw assembly of auxiliary deviation prevention, can be positioned to target cutting position, and limit the lateral displacement of saw blade in cutting process, improve cutting precision.The hand saw assembly includes hand saw and deviation prevention locator, hand saw includes saw blade and handle;Deviation prevention locator includes fixed-point fixing mechanism and cutting limiting mechanism, fixed-point fixing mechanism includes fixed ring and fastening piece, the fixed ring inside is the fixed channel for the cutting object to pass through, and the fastening piece acts on the cutting object to fix the fixed ring on the cutting object;Cutting limiting mechanism includes limiting connection structure and cutting limiting seat, the fixed ring and cutting limiting seat are relatively fixed in radial direction by limiting connection structure, cutting limiting seat is provided with cutting channel and deviation prevention saw groove, deviation prevention saw groove is arranged around cutting channel, the cutting object that passes through fixed channel can continue to pass through cutting channel, and saw blade can be inserted into deviation prevention saw groove to implement cutting to the cutting object in cutting channel.

Description

TECHNICAL FIELD

[0001] The application relates to a kind of processing production metal-like appliances, in particular to a kind of high-precision hand saw assembly of auxiliary deviation prevention. BACKGROUND

[0002] Hand saw is a kind of cutting device completely operated manually, which can be used to cut wood, plastic parts and some metal parts. Hand saw has the advantages of portability, simple operation, small space occupation and low noise compared with electric saw. For some small cutting tasks, hand saw is a better cutting tool. For most artisans and related practitioners, hand saw is one of the essential tools. However, in actual use, hand saw still has defects that are difficult to solve. Since hand saw is completely operated manually, the alignment during cutting is completely controlled by the operator's feeling and experience, which often has the defect of poor cutting precision, and is easy to cause large deviation of cutting point and poor cutting surface flatness. For some small cutting work with high processing precision requirements, the existing hand saw is more difficult to meet the precision requirements.

[0003] Therefore, whether a hand saw tool can be designed to meet the existing advantages of hand saw and improve the cutting precision has become one of the problems to be solved in the field. SUMMARY

[0004] The purpose of the present application is to solve the problems in the above background art, and to provide a kind of high-precision hand saw assembly of auxiliary deviation prevention. When hand saw cutting is carried out, the target cutting position can be positioned, and the lateral displacement of the saw blade during cutting is limited, which can assist in maintaining a relatively neat and straight cut, and improve the cutting precision.

[0005] In order to achieve the above-mentioned purpose of the application, the following technical solutions are adopted:

[0006] A kind of high-precision hand saw assembly of auxiliary deviation prevention is used for precise cutting of long strip-shaped cutting objects. The hand saw assembly comprises a hand saw and a deviation prevention positioner. The hand saw comprises a saw blade and a handle. The deviation prevention positioner comprises a fixed point fixing mechanism and a cutting limiting mechanism. The fixed point fixing mechanism comprises a fixed ring and a fastening member. The inner side of the fixed ring forms a fixed channel for the cutting object to pass through. The fastening member is arranged on the fixed ring and can extend into the fixed channel. The fastening member acts on the cutting object to fix the fixed ring on the cutting object. The cutting limiting mechanism comprises a limiting connection structure and a cutting limiting seat. The cutting limiting seat is connected to the fixed ring through the limiting connection structure, and the position of the fixed ring and the cutting limiting seat is fixed in the radial direction through the limiting connection structure. The cutting limiting seat is provided with a cutting channel and a deviation prevention saw groove. The deviation prevention saw groove is arranged around the cutting channel. The cutting object passing through the fixed channel can continue to pass through the cutting channel. The saw blade can be inserted into the deviation prevention saw groove to cut the cutting object in the cutting channel.

[0007] Compared with the prior art, the auxiliary anti-deviation high-precision hand saw assembly has the following beneficial effects:

[0008] The anti-deviation positioner in the scheme can be positioned at the target cutting position of the object to be cut, and is fixed on the object to be cut through the fixed-point fixing mechanism, so that the cutting limiting seat is correspondingly fixed outside the target cutting position, and the anti-deviation saw groove is aligned with the cutting point at the same time. When the hand-held hand saw is used to insert the saw blade into the anti-deviation saw groove for cutting operation, the left and right deviation of the saw blade can be limited, which is beneficial to achieve a more straight cutting seam and improve the cutting precision.

[0009] As a preferred, the limiting connection structure includes a connecting ring seat and a connecting rod, the connecting ring seat is rotationally connected with the fixed ring sleeve, and the connecting ring seat and the fixed ring sleeve are coaxially arranged, the cutting limiting seat is fixedly connected with the connecting ring seat through the connecting rod, and a gap is arranged between the cutting limiting seat and the connecting ring seat. The gap can be used for observing the object to be cut and sawdust falling; the cutting limiting seat includes an integrally fixed base and a saw groove setting part, the base is fixedly connected with the connecting rod to provide a basic support function, and the anti-deviation saw groove is located in the saw groove setting part. The anti-deviation saw groove extends to both ends of the base without penetrating the base. The position of the entire cutting limiting seat is fixed and stable through the base. Since the anti-deviation saw groove cannot completely penetrate the cutting limiting seat, the cutting of the object to be cut cannot be completely cut off. However, the connecting ring seat and the fixed ring sleeve can be relatively rotated, so that the cutting limiting seat can be rotated to continue cutting the uncut part after a part of the cutting is completed, so as to achieve the purpose of completely cutting off. At the same time, since the fixed ring sleeve is fixed with the object to be cut, the axial displacement of the connecting ring seat is limited, so that the cutting surface during the entire cutting process is ensured to be flush.

[0010] As a preferred, the saw groove setting part is an arc-shaped ring structure, the anti-deviation saw groove is formed in an arc-shaped notch structure in adaptation to the shape of the saw groove setting part, and the perpendicular distance from the midpoint of the anti-deviation saw groove to the line connecting the two ends thereof is greater than the radius of the anti-deviation saw groove. The arc-shaped profile formed by the anti-deviation saw groove is a superior arc, and the anti-deviation saw groove is an arc shape greater than a semicircle. During cutting, the anti-deviation saw groove can cut through the central axis part of the object to be cut, so as to avoid the situation that the central part of the object to be cut is not cut off after one round of cutting.

[0011] As a preferred, the base is provided with a saw point positioning structure, the anti-deviation saw groove is fixedly arranged at a position opposite to the saw point positioning structure, the saw point positioning structure is used for finding and determining the target cutting point of the object to be cut, and the anti-deviation saw groove is aligned with the target cutting point after the target cutting point is determined by the saw point positioning structure.

[0012] As a preferred, the saw point positioning structure includes an observation window and a pointing piece, the observation window penetrates the inside and outside of the base, the pointing piece is located in the observation window, and the pointing end of the pointing piece is aligned with the center of the anti-deviation saw groove.

[0013] In the positioning of the target cutting point, the control deviation positioner is moved on the object to be cut, and the target cutting point can be conveniently observed. After the pointing end of the pointing piece is aligned with the target cutting point, the fixing ring cover is fixed, at this time the center of the deviation prevention saw slot is aligned with the target cutting point, and then cutting is performed, which is beneficial to quickly and accurately position the target cutting point and avoid cutting mispositioning.

[0014] As a preferred, the saw slot setting part is provided with a plurality of rolling balls on the inner walls of both sides of the deviation prevention saw slot, the rolling balls are protruded from the inner walls of the deviation prevention saw slot to the deviation prevention saw slot, and the rolling balls are distributed along the arc-shaped path of the deviation prevention saw slot; when the saw blade is inserted into the deviation prevention saw slot, the rolling balls on the inner walls of both sides of the deviation prevention saw slot respectively contact the surfaces of both sides of the saw blade. When the saw blade is inserted into the deviation prevention saw slot to perform a push-pull action, the rolling balls on both sides can not only limit the left and right deviation of the saw blade, but also provide rolling friction to reduce the friction resistance suffered by the saw blade, so that the saw blade is more labor-saving.

[0015] As a preferred, a self-locking structure is further arranged between the connecting ring seat and the fixing ring cover, the self-locking structure limits the free relative rotation of the connecting ring seat and the fixing ring cover, the self-locking structure comprises a spring lock piece arranged in the fixing ring cover and a lock groove arranged in the connecting ring seat, the spring lock piece comprises a spring embedded in the fixing ring cover and a lock ball, the connecting ring seat is provided with a plurality of circumferentially uniformly distributed lock grooves on the contact surface of the connecting ring seat, the lock ball is pressed to the connecting ring seat under the action of the spring, and the lock ball is elastically inserted into and separated from the lock groove with the rotation of the connecting ring seat. The self-locking structure can maintain the relative fixation of the connecting ring seat and the fixing ring cover, and avoid the free rotation of the cutting limiting seat when the saw blade is pushed and pulled. When the connecting ring seat is manually rotated with force, the lock ball can be separated from the lock groove, the rotation angle of the connecting ring seat can be adjusted, and the rotation angle is adjusted by the lock ball being elastically inserted into different lock grooves in sequence, so that multi-angle cutting can be performed.

[0016] As a preferred, a blocking structure is arranged at the end of the saw blade, the blocking structure protrudes to both sides of the saw blade at the same time, and the width of the blocking structure is greater than the width of the deviation prevention saw slot. When the saw blade is operated to perform a push-pull action in the deviation prevention saw slot, the blocking structure can prevent the end of the saw blade from penetrating through the deviation prevention saw slot, so that the end of the saw blade is prevented from abutting against the inner wall of the cutting limiting seat to cause the cutting to be unable to normally proceed.

[0017] As a preferred, the fastening piece comprises at least three fastening knobs, the fastening knobs are threadedly connected with the fixing ring cover, and all the fastening knobs are arranged at equal angles around the axis of the fixing ring cover. The plurality of fastening knobs can be tightly pressed around the outer periphery of the object to be cut, and can be suitable for the fixation of cylindrical, prismatic or irregular objects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of an embodiment of the auxiliary deviation prevention high-precision hand saw assembly of the present application.

[0019] Figure 2 The structure schematic diagram (bird's eye view) of the anti-deviation positioner in the embodiment.

[0020] Figure 3 The structure schematic diagram (bottom view) of the anti-deviation positioner in the embodiment.

[0021] Figure 4 The installation schematic diagram of the anti-deviation positioner on the to-be-cut object in the embodiment.

[0022] Figure 5 The structure schematic diagram of the self-locking structure in the embodiment.

[0023] Figure 6 The distribution schematic diagram of the locking slot on the connecting ring seat in the embodiment.

[0024] Reference signs: 1, hand saw; 10, saw blade; 11, handle; 12, blocking structure; 2, anti-deviation positioner; 20, fixed-point fixing mechanism; 200, fixing ring sleeve; 2000, tightening knob; 201, tightening member; 21, cutting limiting mechanism; 210, cutting limiting seat; 2100, base; 2101, saw slot setting part; 211, connecting ring seat; 212, connecting rod; 213, anti-deviation saw slot; 214, ball; 215, saw point positioning structure; 2150, observation window; 2151, pointing member; 216, cutting channel; 3, to-be-cut object. DETAILED DESCRIPTION

[0025] The application will be further described below in combination with the drawings.

[0026] As Figures 1 to 6 shown in the auxiliary anti-deviation high-precision hand saw assembly, for precise cutting of long strip-shaped to-be-cut object 3, the hand saw 1 assembly includes the hand saw 1 and the anti-deviation positioner 2, the hand saw 1 includes the saw blade 10 and the handle 11, the end of the saw blade 10 is provided with the blocking structure 12, the blocking structure 12 protrudes to both sides of the saw blade 10 at the same time, the width of the blocking structure 12 is greater than the width of the anti-deviation saw slot 213.

[0027] The anti-deviation positioner 2 comprises a fixed-point fixing mechanism 20 and a cutting limiting mechanism 21. The fixed-point fixing mechanism 20 comprises a fixing ring 200 and a fastening member 201. The fixing ring 200 has a fixing channel formed on the inner side thereof for the to-be-cut object 3 to pass through. The fastening member 201 is arranged on the fixing ring 200 and can extend into the fixing channel. The fastening member 201 acts on the to-be-cut object 3 to fix the fixing ring 200 on the to-be-cut object 3. The fastening member 201 comprises four fastening knobs 2000 which are threadedly connected with the fixing ring 200. The four fastening knobs 2000 are arranged at equal angles around the axis of the fixing ring 200, i.e., the four fastening knobs 2000 are distributed in a cross shape.

[0028] The cutting limiting mechanism 21 comprises a limiting connection structure and a cutting limiting seat 210. The cutting limiting seat 210 is connected with the fixing ring 200 through the limiting connection structure, and the fixing ring 200 and the cutting limiting seat 210 are fixed in position in the radial direction through the limiting connection structure. The limiting connection structure comprises a connecting ring seat 211 and a connecting rod 212. The connecting ring seat 211 is rotationally connected with the fixing ring 200 and is coaxially arranged with the fixing ring 200. The cutting limiting seat 210 is fixedly connected with the connecting ring seat 211 through the connecting rod 212. A gap is arranged between the cutting limiting seat 210 and the connecting ring seat 211, which can be used for observing the to-be-cut object 3 and sawdust falling. A self-locking structure is further arranged between the connecting ring seat 211 and the fixing ring 200. The self-locking structure is used for limiting the free relative rotation of the connecting ring seat 211 and the fixing ring 200. The self-locking structure comprises a spring lock member arranged in the fixing ring 200 and a lock groove arranged in the connecting ring seat 211. The spring lock member comprises a spring and a lock ball embedded in the fixing ring 200. The connecting ring seat 211 is provided with a plurality of circumferentially uniformly distributed lock grooves on the contact surface thereof with the fixing ring 200. The lock grooves are strip-shaped grooves, and the axes of the lock grooves point to the center of the connecting ring seat 211. The lock ball is pressed towards the connecting ring seat 211 under the action of the spring, and the lock ball is elastically inserted into and separated from the lock grooves along with the rotation of the connecting ring seat 211. When the lock ball is elastically inserted into the lock grooves, the relative fixation of the connecting ring seat 211 and the fixing ring 200 can be maintained, and the free rotation of the cutting limiting seat 210 when the push-pull saw blade 10 is pushed and pulled can be avoided. When it is necessary to adjust the rotation angle of the connecting ring seat 211, the connecting ring seat 211 can be manually and forcibly rotated, so that the lock ball is separated from the lock grooves, and the rotation angle of the cutting limiting seat 210 is adjusted by elastically inserting the lock ball into different lock grooves in sequence.

[0029] The cutting limiting seat 210 is provided with a cutting channel 216 and a deviation-preventing saw slot 213, the deviation-preventing saw slot 213 is arranged around the cutting channel 216, the object to be cut 3 passing through the fixed channel can continue to pass through the cutting channel 216, and the saw blade 10 can be inserted into the deviation-preventing saw slot 213 to cut the object to be cut 3 in the cutting channel 216. The cutting limiting seat 210 comprises an integrally fixed base 2100 and a saw slot setting part 2101, the base 2100 is fixedly connected with the connecting rod 212 to provide a basic support function, and the deviation-preventing saw slot 213 is located in the saw slot setting part 2101 and extends to both ends of the base 2100 without penetrating through the base 2100. The saw slot setting part 2101 is an arc-shaped annular structure, the deviation-preventing saw slot 213 forms an arc-shaped notch structure in adaptation to the shape of the saw slot setting part 2101, and the perpendicular distance from the midpoint of the deviation-preventing saw slot 213 to the connecting line of both ends thereof is greater than the radius of the deviation-preventing saw slot 213. The base 2100 can maintain the position of the entire cutting limiting seat 210 fixed and stable, and since the deviation-preventing saw slot 213 cannot completely penetrate through the cutting limiting seat 210, the cutting of the object to be cut 3 cannot be completely cut off, and the relative rotation design of the connecting ring seat 211 and the fixed ring sleeve 200 can continue to cut the uncut part after a part of the cutting is performed, and the arc profile formed by the deviation-preventing saw slot 213 is an optimal arc, that is, the deviation-preventing saw slot 213 is an arc greater than a semicircle, which can saw through the central axis part of the object to be cut 3 during cutting, thereby avoiding the situation that the central part of the object to be cut 3 is still not cut off after one round of cutting.

[0030] The base 2100 is provided with a saw point positioning structure 215, the saw point positioning structure 215 comprises an observation window 2150 and a pointing piece 2151, the observation window 2150 penetrates through the inside and outside of the base 2100, and the pointing piece 2151 is located in the observation window 2150, and the pointing end of the pointing piece 2151 is aligned with the center of the deviation-preventing saw slot 213. The saw point positioning structure 215 is used to find and determine the target cutting point of the object to be cut 3, and the deviation-preventing saw slot 213 is aligned with the target cutting point after the saw point positioning structure 215 determines the target cutting point. When the target cutting point is positioned, the deviation-preventing positioner 2 is controlled to move on the object to be cut 3, so that the target cutting point can be conveniently observed, and after the pointing end of the pointing piece 2151 is aligned with the target cutting point, the fixed ring sleeve 200 is fixed, at this time, the center of the deviation-preventing saw slot 213 is aligned with the target cutting point, and then cutting can be performed.

[0031] The saw slot setting part 2101 is provided with a ball 214 on the inner wall of both sides of the anti-deviation saw slot 213. The ball 214 is protruded from the inner wall of the anti-deviation saw slot 213 into the anti-deviation saw slot 213, and the ball 214 is distributed along the arc-shaped path of the anti-deviation saw slot 213. When the saw blade 10 is inserted into the anti-deviation saw slot 213, the balls 214 on the inner walls of both sides of the anti-deviation saw slot 213 respectively contact the surfaces of both sides of the saw blade 10. When the saw blade 10 is inserted into the anti-deviation saw slot 213 to perform a push-pull action, the balls 214 on both sides can not only limit the left and right deviation of the saw blade 10, but also provide rolling friction to reduce the frictional resistance of the saw blade 10, so that the saw blade action is more labor-saving.

[0032] The above is the preferred embodiment of the present application. Those skilled in the art can make several modifications and improvements without departing from the principles of the present application. These should also be considered as the protection scope of the present application.

Claims

1. An assisted anti-tilt high-precision hand saw assembly for the precise cutting of elongated objects (3) to be cut, characterized in that: The hand saw (1) comprises a saw blade (10) and a handle (11), and the anti-deviation positioner (2) comprises a fixed-point fixing mechanism (20) and a cutting limiting mechanism (21). The fixed-point fixing mechanism (20) comprises a fixed ring (200) and a fastening member (201). The inside of the fixed ring (200) forms a fixed channel for the passage of an object to be cut (3). The fastening member (201) is arranged on the fixed ring (200) and can extend into the fixed channel. The fastening member (201) acts on the object to be cut (3) to fix the fixed ring (200) on the object to be cut (3). The cutting limiting mechanism (21) comprises a limiting connection structure and a cutting limiting seat (210). The cutting limiting seat (210) is connected to the fixed ring (200) through the limiting connection structure. The fixed ring (200) and the cutting limiting seat (210) are fixed in position in the radial direction through the limiting connection structure. The cutting limiting seat (210) is provided with a cutting channel (216) and an anti-deviation saw slot (213). The anti-deviation saw slot (213) is arranged around the cutting channel (216). The object to be cut (3) that passes through the fixed channel can continue to pass through the cutting channel (216). The saw blade (10) can be inserted into the anti-deviation saw slot (213) to cut the object to be cut (3) in the cutting channel (216). The limiting connection structure comprises a connecting ring seat (211) and a connecting rod (212). The connecting ring seat (211) is rotationally connected to the fixed ring (200) and coaxially arranged with the fixed ring (200). The cutting limiting seat (210) is fixedly connected to the connecting ring seat (211) through the connecting rod (212). A gap is provided between the cutting limiting seat (210) and the connecting ring seat (211). The gap can be used to observe the object to be cut (3) and sawdust falling. The cutting limiting seat (210) comprises an integrally fixed base (2100) and a saw slot arrangement portion (2101). The base (2100) is fixedly connected to the connecting rod (212) to provide a basic support function. The anti-deviation saw slot (213) is located in the saw slot arrangement portion (2101) and extends to both ends of the base (2100) without penetrating the base (2100).

2. The precision jigsaw assembly of claim 1, wherein: The saw slot arrangement portion (2101) is an arc-shaped ring structure. The anti-deviation saw slot (213) is formed in an arc-shaped slot structure to adapt to the shape of the saw slot arrangement portion (2101). The perpendicular distance from the midpoint of the anti-deviation saw slot (213) to the line connecting its two ends is greater than the radius of the anti-deviation saw slot (213).

3. The precision jigsaw assembly of claim 1 or 2, wherein: The base (2100) is provided with a saw point positioning structure (215). The anti-deviation saw slot (213) is fixedly arranged with the saw point positioning structure (215). The saw point positioning structure (215) is used to find and determine the target cutting point of the object to be cut (3). After the saw point positioning structure (215) determines the target cutting point, the anti-deviation saw slot (213) is aligned with the target cutting point.

4. The precision jigsaw assembly of claim 3, wherein: The saw point positioning structure (215) comprises an observation window (2150) and a pointing piece (2151), the observation window (2150) penetrates the inner and outer sides of the base (2100), the pointing piece (2151) is located in the observation window (2150), and the pointing end of the pointing piece (2151) is aligned with the center of the anti-deviation saw slot (213).

5. The precision jigsaw assembly of claim 1, wherein: The saw slot setting part (2101) is provided with a plurality of rolling balls (214) on the inner walls of the two sides of the anti-deviation saw slot (213), the rolling balls (214) are protruded from the inner walls of the anti-deviation saw slot (213) into the anti-deviation saw slot (213), and the rolling balls (214) are distributed along the arc-shaped path of the anti-deviation saw slot (213); when the saw blade (10) is inserted into the anti-deviation saw slot (213), the rolling balls (214) on the inner walls of the two sides of the anti-deviation saw slot (213) respectively contact the surfaces of the two sides of the saw blade (10).

6. The precision jigsaw assembly of claim 1, wherein: The connecting ring seat (211) and the fixed ring sleeve (200) are further provided with a self-locking structure, the self-locking structure limits the free relative rotation of the connecting ring seat (211) and the fixed ring sleeve (200), the self-locking structure comprises a spring locking piece arranged on the fixed ring sleeve (200) and a locking groove arranged on the connecting ring seat (211), the spring locking piece comprises a spring embedded in the fixed ring sleeve (200) and a locking ball, the connecting ring seat (211) is provided with a plurality of circumferentially uniformly distributed locking grooves on the contact surface of the connecting ring seat (211) and the fixed ring sleeve (200), the locking ball is pressed towards the connecting ring seat (211) under the action of the spring, and the locking ball is elastically inserted into and separated from the locking groove along with the rotation of the connecting ring seat (211).

7. The precision jigsaw assembly of claim 1, wherein: The end of the saw blade (10) is provided with a blocking structure (12), the blocking structure (12) protrudes to both sides of the saw blade (10) at the same time, and the width of the blocking structure (12) is greater than the width of the anti-deviation saw slot (213).

8. The precision jigsaw assembly of claim 1, wherein: The fastening piece (201) comprises at least three fastening knobs (2000), the fastening knobs (2000) are in threaded connection with the fixed ring sleeve (200), and all the fastening knobs (2000) are arranged at equal angles around the axis of the fixed ring sleeve (200).

Images