High-concentricity sharpening machine positioning device

Abstract

The utility model relates to the field of sharpening devices, and discloses a high-concentricity sharpening machine positioning device. The base is suitable for being installed on the sharpening machine, the positioning and clamping mechanism is installed on the base and used for clamping and positioning shaft parts, the positioning and clamping mechanism comprises a driving rotating wheel assembly and a pressing rotating wheel assembly, and an elastic driving assembly is arranged on the pressing rotating wheel assembly; the elastic driving assembly is suitable for driving the pressing rotating wheel assembly to always have elastic force moving towards the driving rotating wheel assembly so as to compensate abrasion. According to the utility model, the abrasion value can be automatically compensated, and the concentricity of the polished tip of the shaft part is improved; the elastic force applied by the driving spring can be adjusted by adjusting the adjusting column, so that the driving wheel can drive the shaft parts with different diameters to rotate normally and smoothly; and through the arrangement of the annular groove, the surface contact with the shaft part can be reduced, and the abrasion area of the shaft part is reduced when the shaft part is clamped and driven to rotate.

Description

Technical Field

[0001] This utility model relates to the technical field of grinding devices, and more specifically, to a high concentricity positioning device for a grinding machine. Background Technology

[0002] Some shaft-like parts require tip grinding. A positioning device is installed on the tip grinding machine to position the shaft-like part to be processed. Then, a grinding machine is used to grind the tip, ensuring good concentricity between the tip and the shaft-like part. Existing positioning devices include two adjacent drive wheels and a clamping wheel. The two drive wheels are rotatably mounted on the tip grinding machine, while the clamping wheel is slidably mounted on the machine via a lifting drive. During tip grinding, the clamping wheel and the two drive wheels form a three-point fixed-center clamping mechanism for the shaft-like part, thus ensuring the concentricity of the tip.

[0003] However, when positioning and clamping shaft parts for grinding, the outer walls of the clamping wheel and the drive wheel will also wear. After repeated use, gaps may easily appear when the clamping wheel and the two drive wheels clamp the shaft parts, making it impossible to clamp stably. This causes the shaft parts to bounce slightly when grinding, affecting the concentricity of the tip. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides a high concentricity positioning device for a grinding machine, comprising a base suitable for mounting on a grinding machine and a positioning clamping mechanism mounted on the base for clamping and positioning shaft-like parts. The positioning clamping mechanism includes a drive wheel assembly and a clamping wheel assembly. The drive wheel assembly includes two drive wheels, both of which rotate on the base and are arranged adjacent to each other, with the two drive wheels rotating in the same direction. The clamping wheel assembly includes a drive cylinder, a connecting rod, and a clamping wheel. The drive cylinder is connected to the base, and the connecting rod is extended and retracted in relation to the drive cylinder. The connecting rod is rotatably connected to the clamping wheel. The driving cylinder is adapted to drive the connecting rod to move the clamping wheel closer to or away from the two driving wheels. The connecting rod has an oblong hole, and a rotating shaft is inserted into the oblong hole. The clamping wheel is sleeved on the rotating shaft and rotates relative to the rotating shaft. The connecting rod has an elastic driving component, which is connected to the rotating shaft and adapted to drive the rotating shaft to move the clamping wheel toward the two driving wheels. When the clamping wheel and the two driving wheels clamp the shaft-like parts, there is a certain gap between the end of the oblong hole near the two driving wheels and the rotating shaft.

[0005] Optionally, the connecting rod has a rotation notch, the clamping wheel is located inside the rotation notch and protrudes from the rotation notch, and two positioning and clamping mechanisms are spaced apart on the base.

[0006] Optionally, the driving rotating wheel assembly further comprises a driving motor and a transmission belt ring, the driving motor and the two driving wheels are connected with the transmission belt ring, and the driving motor is adapted to drive the transmission belt ring to rotate and drive the two driving wheels to rotate.

[0007] Optionally, a bearing is sleeved on the rotating shaft, and the compression wheel is sleeved on the bearing.

[0008] Optionally, the elastic driving assembly comprises a connecting block and a driving spring, the connecting block is located at one end of the waist-shaped hole away from the driving wheel and is fixed on the outer wall of the connecting rod, a spring groove is formed in the outer wall of the rotating shaft, an insertion groove is formed in the connecting block, one end of the driving spring is inserted into the spring groove, and the other end of the driving spring is inserted into the insertion groove.

[0009] Optionally, the insertion groove penetrates the connecting block along the forming direction, an adjusting column is inserted into one end of the insertion groove away from the driving spring, and the adjusting column is threadedly connected with the connecting block.

[0010] Optionally, a threaded groove is formed in the bottom of the spring groove, a limiting column is threadedly connected in the threaded groove, the driving spring is sleeved on the limiting column, and the limiting column is inserted into the insertion groove.

[0011] Optionally, a butt joint hole is formed in the side of the adjusting column close to the driving spring, the butt joint hole penetrates the adjusting column, and one end of the limiting column is inserted into the butt joint hole and abuts against the hole wall of the butt joint hole.

[0012] Optionally, the end of the adjusting column away from the driving spring protrudes out of the insertion groove, and a hexagonal driving groove adapted to cooperate with an internal hexagonal wrench is arranged at the end of the adjusting column away from the driving spring.

[0013] Optionally, the elastic force of the driving spring after compression is greater than the friction force when the grinder grinds the end of the shaft part, and a ring groove is formed in the outer peripheral wall of the driving wheel and the compression wheel.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] 1. The elastic driving assembly can drive the compression rotating wheel assembly to have an elastic tendency of moving towards the driving rotating wheel assembly all the time, after the outer peripheral wall of the driving wheel or the compression wheel is worn, when the shaft part is clamped again, the elastic driving assembly can drive the compression wheel to automatically move a specific distance towards the driving wheel to compensate, so that the driving wheel and the compression wheel can still clamp the shaft part well, and the concentricity of the shaft part after the tip is ground is improved.

[0016] 2. The two drive wheels rotate in the same direction under the action of the drive motor and the transmission belt ring. After the shaft parts are clamped, they can rotate under the action of the drive wheels. At this time, the grinder only needs to grind a fixed position at the end of the shaft parts, which improves the convenience of grinding the tip.

[0017] 3. After the clamping wheel and the drive wheel clamp the shaft parts, the drive spring will be compressed by the squeezing force, so that the drive spring can continuously apply an elastic potential energy to the shaft, so that the wear of the clamping wheel or the drive wheel can be compensated in time.

[0018] 4. The elastic force applied by the drive spring to the rotating shaft can be adjusted by adjusting the adjusting column. Users can adjust the elastic potential energy applied by the drive spring according to the actual diameter of the shaft parts being processed, so that the drive wheel can drive the shaft parts to rotate normally and smoothly.

[0019] 5. One end of the limiting post is connected to the rotating shaft, and the other end is inserted into the mating hole of the adjusting post and abuts against the hole wall. This makes it difficult for the rotating shaft to rotate relative to the rotating shaft when it moves in the waist-shaped hole, so that the drive spring will not disengage from the spring groove, thus improving the stability of the elastic drive component when it is engaged with the rotating shaft.

[0020] 6. The ring grooves on the drive wheel and clamping wheel reduce the surface contact with shaft parts, thus reducing the wear area on shaft parts when they are clamped and rotated. Attached Figure Description

[0021] Figure 1 The structure of the positioning device in the embodiments of this utility model Figure 1 ;

[0022] Figure 2 This is a structural diagram of the pressure roller assembly in an embodiment of the present invention;

[0023] Figure 3 The structure of the positioning device in the embodiments of this utility model Figure 2 ;

[0024] Figure 4 This is an exploded view of the clamping wheel assembly in an embodiment of this utility model;

[0025] Figure 5 This is a cross-sectional view of the elastic drive component and the rotating shaft in the embodiment of this utility model.

[0026] Explanation of reference signs: 1, base; 2, positioning and clamping mechanism; 3, driving rotary wheel assembly; 31, driving wheel; 32, driving motor; 33, transmission belt ring; 34, tensioning wheel; 4, pressing rotary wheel assembly; 41, fixed rod; 42, driving cylinder; 43, connecting rod; 44, pressing wheel; 45, waist-shaped hole; 46, rotating shaft; 47, spring groove; 5, elastic driving assembly; 51, connecting block; 52, driving spring; 53, insertion groove; 54, adjusting column; 55, hexagonal driving groove; 56, limiting column; 57, butt joint hole. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0028] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship in normal use of the product.

[0029] The following will be described in detail with reference to the accompanying drawings. Figures 1-5 The application will be further described in detail.

[0030] The utility model embodiment provides a kind of high concentricity's point grinder positioning device, refer to Figure 1 And Figure 2 High concentricity's point grinder positioning device includes the base 1 suitable for being installed on point grinder and the positioning and clamping mechanism 2 for clamping and positioning shaft parts on the base 1. Two positioning and clamping mechanisms 2 are spaced and symmetrically arranged on the base 1, and the two positioning and clamping mechanisms 2 are the same in structure. The positioning and clamping mechanism 2 includes driving rotary wheel assembly 3 and pressing rotary wheel assembly 4, and the pressing rotary wheel assembly 4 is provided with elastic driving assembly 5, and the elastic driving assembly 5 is suitable for driving the pressing rotary wheel assembly 4 to have elastic force to driving rotary wheel assembly 3 at all times to compensate wear.

[0031] The base 1 is provided with a V-shaped groove penetrating through itself, and the positioning and clamping mechanism 2 is located at the notch of the V-shaped groove, and the shaft parts to be processed are located in the V-shaped groove and are pushed to the driving rotary wheel assembly 3 by the feeding mechanism.

[0032] Refer to Figures 1-3, the driving wheel assembly 3 comprises a driving wheel 31, a driving motor 32, a transmission belt ring 33 and a transmission shaft. The driving wheel 31 is provided with two, and the corresponding transmission shaft is also provided with two, two driving wheels 31 are respectively sleeved on two transmission shafts and synchronously rotate with the corresponding transmission shaft. The base 1 is sleeved on the transmission shaft, and the transmission shaft can rotate relative to the base column. The driving motor 32 is connected to the base 1, and the driving motor 32 and the driving wheel 31 are located on the opposite sides of the base 1 respectively, and the transmission belt ring 33 is located on the same side of the driving motor 32. The driving motor 32 and the two transmission shafts are connected with the transmission belt ring 33, and the driving motor 32 is suitable for driving the transmission belt ring 33 to rotate and drive the two driving wheels 31 to rotate. Among them, two driving wheels 31 are arranged adjacent to each other.

[0033] The side of the base 1 provided with the driving motor 32 is also rotatably connected with a tensioning wheel 34, and the tensioning wheel 34 is located below the middle of the two driving wheels 31. The tensioning wheel 34 is also connected with the transmission belt ring 33, and the driving motor 32, the tensioning wheel 34 and the two transmission shafts drive the transmission belt ring 33 to be heart-shaped, so that the rotating directions of the two driving wheels 31 are the same. The rotation of the two driving wheels 31 will drive the shaft parts to rotate, at this time the grinder only needs to grind at a fixed position on the end of the shaft part.

[0034] Referring to Figures 1-4 , the pressing wheel assembly 4 comprises a fixed rod 41, a driving cylinder 42, a connecting rod 43 and a pressing wheel 44. The fixed rod 41 is installed on the base 1 by bolts, and the fixed rod 41 is located on the same side of the base 1 as the driving wheel 31. The middle part of the connecting rod 43 is hingedly connected to the fixed rod 41 through a hinge shaft, and the bottom of the driving cylinder 42 is hingedly connected to the fixed rod 41. The extension rod of the driving cylinder 42 is hingedly connected to one end of the connecting rod 43, and the pressing wheel 44 is rotatably connected to the side of the connecting rod 43 away from the driving cylinder 42. Thus, when the extension rod of the driving cylinder 42 extends or retracts, it can drive the connecting rod 43 to drive the pressing wheel 44 to rise or fall to clamp or release the shaft part in cooperation with the two driving wheels 31. When the pressing wheel 44 falls, it approaches the two driving wheels 31, and vice versa.

[0035] One end of the connecting rod 43 away from the driving cylinder 42 is provided with a rotating gap, so that the end of the connecting rod 43 forms a structure like two connecting lugs arranged at intervals. The pressing wheel 44 is located in the rotating gap and protrudes from the rotating gap to facilitate contact with the shaft part.

[0036] Referring to Figures 1-4The outer wall of one side of the connecting rod 43 is provided with a waist-shaped hole 45, and the waist-shaped hole 45 is communicated with the rotating gap and penetrates through the connecting rod 43. When the pressing wheel 44 and the two driving wheels 31 clamp the shaft parts, the extension direction of the waist-shaped hole 45 is the vertical direction. The rotating shaft 46 is inserted in the waist-shaped hole 45, and the two ends of the rotating shaft 46 protrude out of the connecting rod 43 and are suspended to facilitate cooperation with the elastic driving assembly 5. The rotating shaft 46 is sleeved with a bearing, and the bearing is located in the rotating gap. The pressing wheel 44 is sleeved on the bearing and rotates relative to the rotating shaft 46.

[0037] Referring to Figures 1-5 The elastic driving assembly 5 is installed on the side wall of the connecting rod 43, and the elastic driving assembly 5 is connected with the rotating shaft 46 and is suitable for driving the rotating shaft 46 to move the pressing wheel 44 to the two driving wheels 31. The elastic driving assembly 5 is provided with two groups, and the two groups of elastic driving assemblies 5 are respectively located on the opposite sides of the connecting rod 43 and cooperate with the two ends of the rotating shaft 46, so that the rotating shaft 46 drives the pressing wheel 44 to move in the waist-shaped hole 45 more stably and is not easy to jam.

[0038] The elastic driving assembly 5 includes a connecting block 51 and a driving spring 52. The connecting block 51 is located at one end of the waist-shaped hole 45 away from the driving wheel 31 and is fixedly arranged on the outer wall of the connecting rod 43. The connecting block 51 is provided with a slot 53 on the side close to the rotating shaft 46, and the slot 53 penetrates through the connecting block 51 along the direction of arrangement. The outer wall of the side close to the connecting block 51 of the rotating shaft 46 is provided with a spring groove 47, one end of the driving spring 52 is inserted into the spring groove 47 and abuts against the groove bottom of the spring groove 47; the other end of the driving spring 52 is inserted into the slot 53. Among them, the end of the slot 53 away from the driving spring 52 is inserted with an adjusting column 54, and the adjusting column 54 is threadedly connected with the connecting block 51. One end of the driving spring 52 located in the slot 53 abuts against the adjusting column 54, and then the rotating shaft 46 drives the pressing wheel 44 to have a tendency to move in the direction close to the driving wheel 31.

[0039] Referring to Figures 1-5 The end of the adjusting column 54 away from the driving spring 52 protrudes out of the slot 53, and the end of the adjusting column 54 away from the driving spring 52 is provided with a hexagonal driving groove 55 suitable for cooperating with an internal hexagonal wrench, so as to facilitate the use of the internal hexagonal wrench to drive the adjusting column 54 to rotate and move, so as to adjust the size of the elastic driving force of the driving spring 52 on the rotating shaft 46 and the pressing wheel 44.

[0040] When the pressing wheel 44 and the two driving wheels 31 clamp the shaft parts, the driving spring 52 is in a compressed state, and the end of the waist-shaped hole 45 close to the two driving wheels 31 is spaced apart from the rotating shaft 46 by a certain gap. The elastic driving force of the compressed driving spring 52 is greater than the friction force when the grinder grinds the end part of the shaft part, so that the shaft part is not easy to jump and affect the tip concentricity when the grinder grinds the shaft part due to the small elastic force of the driving spring 52.

[0041] With reference to Figures 1-5 The bottom of the spring groove 47 is provided with a threaded groove, a limiting column 56 is threadedly connected in the threaded groove, the drive spring 52 is sleeved on the limiting column 56, and the limiting column 56 is inserted in the insertion groove 53. The side of the adjusting column 54 close to the drive spring 52 is provided with a butt joint hole 57, the butt joint hole 57 penetrates the adjusting column 54, the inner diameter of the butt joint hole 57 is smaller than the groove diameter of the hexagonal drive groove 55 and communicates with the hexagonal drive groove 55. One end of the limiting column 56 is inserted in the butt joint hole 57 and abuts against the hole wall of the butt joint hole 57, so that the rotating shaft 46 is not easy to relatively rotate when moving in the waist-shaped hole 45 to make the drive spring 52 disengage from the spring groove 47, and the stability of the elastic drive assembly 5 when cooperating with the rotating shaft 46 is improved.

[0042] When the limiting column 56 is installed, the rotating shaft 46 is first inserted in the waist-shaped hole 45 and then axially limited by the snap spring, then the limiting column 56 is inserted from the side of the rotating shaft 46 away from the insertion groove 53 and makes the limiting column 56 inserted in the threaded groove, then the limiting column 56 is rotated from the gap between the connecting block 51 and the rotating shaft 46 to make the limiting column 56 threadedly connected with the rotating shaft 46, so that the convenience during installation is improved.

[0043] The ring grooves are arranged on the drive wheels 31 and the compression wheels 44, so that the contact area of the drive wheels 31 and the compression wheels 44 with the shaft parts is reduced, and the wear area of the shaft parts is reduced when the shaft parts are clamped and driven to rotate.

[0044] The implementation principle of the high-concentricity point-sharpening machine positioning device is that when the shaft parts are positioned and clamped, the drive cylinder 42 drives the compression wheel 44 to move in the direction close to the drive wheel 31, and the compression wheel 44 and the two drive wheels 31 clamp the shaft parts. At this time, the drive spring 52 is in a compressed state, and the end of the waist-shaped hole 45 close to the two drive wheels 31 is spaced apart from the rotating shaft 46 by a certain gap, so that the compression wheel 44 or the drive wheel 31 can be compensated in time after being worn, and the concentricity of the shaft part after the tip is polished is improved. The elastic driving force of the compressed drive spring 52 is greater than the friction force when the polisher polishes the end of the shaft part, so that the shaft part is not easy to jump and affect the concentricity of the tip when the polisher polishes the shaft part due to the small elastic force of the drive spring 52.

[0045] The above embodiment only expresses one embodiment of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the utility model concept of the present disclosure, a number of modifications and improvements can be made, which belong to the protection scope of the present disclosure.

Claims

1. A high concentricity point sharpener positioning device characterized by: The utility model provides a base (1) and positioning and clamping mechanism (2) of installing on the base (1) are included to the shaft class spare of being suitable for installing on the base (1) and positioning and clamping mechanism (2), positioning and clamping mechanism (2) includes drive rotary wheel subassembly (3) and pressure wheel subassembly (4), drive rotary wheel subassembly (3) includes two drive wheels (31), two drive wheels (31) are adjacent and are set up in rotation in base (1), the direction of rotation of two drive wheels (31) is same, pressure wheel subassembly (4) includes drive cylinder (42), connecting rod (43) and pressure wheel (44), drive cylinder (42) is connected with base (1), connecting rod (43) is connected with the telescopic rod of drive cylinder (42), pressure wheel (44) is rotatably connected with connecting rod (43), drive cylinder (42) is suitable for driving connecting rod (43) drive pressure wheel (44) is close to two drive wheels (31) or far away, connecting rod (43) is equipped with waist shape hole (45), waist shape hole (45) is inserted with rotating shaft (46), pressure wheel (44) is set on rotating shaft (46) and rotates relative to rotating shaft (46), connecting rod (43) is equipped with elastic drive subassembly (5), elastic drive subassembly (5) is connected with rotating shaft (46) and is suitable for drive rotating shaft (46) drive pressure wheel (44) is moved to two drive wheels (31), when pressure wheel (44) and two drive wheels (31) are clamped to shaft class spare, the end of waist shape hole (45) is close to two drive wheels (31) and is spaced apart with a certain gap between rotating shaft (46).

2. The high concentricity point sizer positioning device of claim 1, wherein: Connecting rod (43) is provided with a rotating gap, pressure wheel (44) is located in the rotating gap and pressure wheel (44) protrudes from the rotating gap, positioning and clamping mechanism (2) is spaced apart with two on base (1).

3. The high concentricity point sizer positioning device of claim 1, wherein: Drive rotary wheel subassembly (3) further includes drive motor (32) and transmission belt ring (33), drive motor (32) and two drive wheels (31) are connected with transmission belt ring (33), drive motor (32) is suitable for driving transmission belt ring (33) rotation and drive two drive wheels (31) rotation.

4. The high concentricity point sizer positioning device of claim 1, wherein: Rotating shaft (46) is provided with a bearing, and pressure wheel (44) is provided on the bearing.

5. A high concentricity point sharpener positioning device according to any one of claims 1-4, characterized in that: Elastic drive subassembly (5) includes connecting block (51) and drive spring (52), connecting block (51) is located at one end of waist shape hole (45) away from drive wheel (31) and is fixedly arranged on the outer wall of connecting rod (43), spring groove (47) is formed in the outer wall of rotating shaft (46), plug-in groove (53) is formed in connecting block (51), one end of drive spring (52) is inserted into spring groove (47), and the other end is inserted into plug-in groove (53).

6. The high concentricity point sizer positioning device of claim 5, wherein: The insertion slot (53) penetrates the connecting block (51) along an opening direction, an adjusting column (54) is inserted at one end of the insertion slot (53) away from the driving spring (52), the adjusting column (54) is threadedly connected with the connecting block (51), and the two ends of the driving spring (52) respectively abut against the adjusting column (54) and the groove bottom of the spring groove (47).

7. The high concentricity point sizer positioning device of claim 6, wherein: The groove bottom of the spring groove (47) is provided with a threaded groove, a limiting column (56) is threadedly connected in the threaded groove, the driving spring (52) is sleeved on the limiting column (56), and the limiting column (56) is inserted in the insertion slot (53).

8. The high concentricity point sizer positioning device of claim 7, wherein: The side of the adjusting column (54) close to the driving spring (52) is provided with a butt joint hole (57) penetrating the adjusting column (54), one end of the limiting column (56) is inserted in the butt joint hole (57) and abuts against the hole wall of the butt joint hole (57).

9. The high concentricity point sizer positioning device of claim 6, wherein: The end of the adjusting column (54) away from the driving spring (52) protrudes from the insertion slot (53), and the end of the adjusting column (54) away from the driving spring (52) is provided with a hexagonal driving groove (55) suitable for cooperating with an internal hexagonal wrench.

10. The high concentricity point sizer positioning device of claim 5, wherein: The elastic force of the driving spring (52) after compression is greater than the friction force when the grinding machine grinds the end of the shaft part, and the driving wheel (31) and the pressing wheel (44) are both provided with annular grooves.

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