Automatic feeding clamp for caliper depth groove machining

Abstract

The application relates to an automatic feeding clamp for caliper depth groove machining, which comprises a feeding clamp, a positioning clamp, a screw conveying mechanism, a pushing mechanism and a linkage mechanism; the feeding clamp is driven by the screw conveying mechanism to drive the main ruler to reciprocate on the one side of the positioning clamp; the pushing mechanism pushes the main ruler in the feeding clamp to the positioning clamp, the pushing mechanism moves away from the positioning clamp and linearly reciprocates after being separated from the feeding clamp, and the screw conveying mechanism is driven by the linkage mechanism to make the screw conveying mechanism drive the feeding clamp to reciprocate for feeding. The application only needs one motor to realize the feeding of the feeding clamp and the feeding of the main ruler to the positioning clamp, has the advantages of simple structure, small floor space, low equipment cost, energy saving and environmental protection, and the whole feeding and discharging process is smooth through the cooperation of the linkage mechanism, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of vernier caliper processing, specifically relating to an automatic feeding fixture for processing depth grooves in calipers. Background Technology

[0002] For the production of vernier calipers, the main scale body needs to be machined with a deep groove. Before machining, the main scale needs to be loaded, transported and positioned using a feeding fixture. The whole process requires three steps: feeding, loading and transfer positioning. The loading and transfer positioning require two mechanical structures to be implemented in two steps, resulting in high equipment cost, large footprint, and energy waste. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic feeding fixture for machining depth grooves for calipers in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] An automatic feeding fixture for machining depth grooves in calipers includes a loading fixture, a positioning fixture, a lead screw conveying mechanism, a pushing mechanism, and a linkage mechanism; wherein,

[0006] The feeding fixture is driven by a screw conveyor mechanism, which causes the main ruler to move back and forth on one side of the positioning fixture.

[0007] The pushing mechanism pushes the main ruler in the feeding fixture onto the positioning fixture. After the pushing mechanism moves away from the positioning fixture and disengages from the feeding fixture, it makes a linear reciprocating motion. It also drives the screw conveyor mechanism through the linkage mechanism, so that the screw conveyor mechanism drives the feeding fixture to move back and forth to feed the material.

[0008] As a further optimization of the present invention, the feeding fixture includes a base plate, a limiting groove formed on the upper surface of the base plate and arranged along the length of the base plate, and two limiting plates mounted on the base plate and symmetrically arranged along the limiting groove. The main scale body is inserted into and slides in the limiting groove through the gap between the two limiting plates. The gap between the two limiting plates is less than the length of the measuring claw. The bottom of the two limiting plates is provided with a groove on one side wall near the limiting groove for engaging the measuring claw of the main scale.

[0009] As a further optimization of the present invention, the positioning fixture includes a fixed platform, a positioning groove formed on the upper surface of the fixed platform and arranged along the length of the fixed platform, a cylinder mounted on the fixed platform, a pusher plate fixed to the cylinder rod end and extending into the positioning groove, a plurality of pressure blocks mounted on the edge of the positioning groove and extending to the top of the positioning groove at one end, and guide plates arranged on both sides of the entrance of the positioning groove. The two guide plates are arranged above the positioning groove and the distance between them is less than the length of the measuring claw, which is used to limit the position of the measuring claw when the main scale slides along the positioning groove.

[0010] As a further optimization of the present invention, the screw conveying mechanism includes two guide rails arranged side by side and a first ball screw installed in the guide rails. The base plate is fixed to a first nut threadedly connected to the first ball screw. Sliding feet that are slidably arranged on the guide rails are fixed on both sides of the bottom of the base plate.

[0011] As a further optimization of the present invention, the pushing mechanism includes a second ball screw, a push plate, and an inverted U-shaped push rod. The second ball screw is driven by a motor. One end of the inverted U-shaped push rod is installed on a second nut threaded onto the second ball screw. The push plate is fixedly installed on the other end of the inverted U-shaped push rod. The push plate and the measuring claw are attached to and slide in the slot. The front and rear vertical rods of the inverted U-shaped push rod slide along the front and rear side walls of the rear limiting plate.

[0012] As a further optimization of the present invention, the linkage mechanism includes a sprocket assembly, a rack and a gear. The rack is fixed to the second nut by a bracket and drives the gear to rotate when it moves with the second nut. The rotating gear drives the sprocket assembly to rotate, and the sprocket assembly drives the lead screw conveying mechanism.

[0013] As a further optimization of the present invention, the gear is fixed to the housing of the second ball screw via a rotating shaft and bearings. The sprocket assembly includes a first sprocket, a second sprocket, and a chain. The first sprocket is fixed to the rotating shaft, and the second sprocket is fixed to the first ball screw. The first sprocket and the second sprocket are driven by the chain.

[0014] As a further optimization of the present invention, a lifting door is provided between the feeding fixture and the positioning fixture. The lifting door includes a door frame and a roller shutter door installed in the door frame through a rotating shaft and a coil spring. The rotating shaft is connected to the No. 1 ball screw through a winding rope transmission. When the No. 1 ball screw drives the feeding fixture to move back and forth, it winds up / unwinds the winding rope respectively, so that the rotating shaft rotates in the forward and reverse directions to close and open the roller shutter door.

[0015] The beneficial effects of this invention are as follows:

[0016] 1) This invention only requires one motor to realize the forward and backward movement of the loading fixture for loading and the pushing of the main ruler into the positioning fixture for unloading. It has a simple structure, low equipment cost, energy saving and environmental protection, and with the clever linkage mechanism, the entire loading and unloading process is smooth, which greatly speeds up the processing efficiency.

[0017] 2) The mechanical structure of the entire feeding fixture of the present invention is concentrated on the rear side of the loading fixture, and the feeding station is on the front side, which can ensure the safety of workers and the entire feeding fixture occupies a small area.

[0018] 3) In this invention, the roller shutter-type lifting door between the feeding fixture and the positioning fixture is linked to the No. 1 ball screw through the winding rope. When the feeding fixture moves forward to feed materials and the main scale depth groove at the positioning fixture is being processed, the lifting door is driven to close to separate the feeding fixture and the positioning fixture, so as to avoid the dust generated by the processing groove from affecting the feeding structure on the right side, extend the service life, and reduce the probability of damage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is an overall top view of the present invention.

[0021] Figure 3 This is an overall top view of the present invention with a lifting door.

[0022] Figure 4 This is a schematic diagram of the lifting door and the No. 1 ball screw drive of the present invention.

[0023] In the diagram: 1. Feeding fixture; 11. Base plate; 12. Limiting groove; 13. Limiting plate; 14. Slot; 2. Positioning fixture; 21. Fixed platform; 22. Positioning groove; 23. Cylinder; 24. Pushing plate; 25. Pressing block; 26. Guide plate; 3. Screw conveying mechanism; 31. Guide rail; 32. No. 1 ball screw; 33. No. 1 nut; 34. Sliding foot; 4. Pushing mechanism; 41. No. 2 ball screw; 42. Push plate; 43. Inverted U-shaped push rod; 44. No. 2 nut; 5. Linkage mechanism; 51. Sprocket assembly; 52. Rack; 53. Gear; 6. Lifting door; 61. Door frame; 62. Roller shutter door; 7. Winding rope. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more.

[0026] Example 1

[0027] like Figure 1-2 As shown, an automatic feeding fixture for machining depth grooves in calipers includes a loading fixture 1, a positioning fixture 2, a lead screw conveying mechanism 3, a pushing mechanism 4, and a linkage mechanism 5; wherein,

[0028] The feeding fixture 1 is driven by the lead screw conveyor 3, which drives the main scale to move back and forth on one side of the positioning fixture 2. The feeding fixture 1 includes a base plate 11, a limiting groove 12 formed on the upper surface of the base plate 11 and arranged along the length of the base plate 11, and two limiting plates 13 mounted on the base plate 11 and symmetrically arranged along the limiting groove 12. The main scale body is inserted into and slides in the limiting groove 12 through the gap between the two limiting plates 13. The gap between the two limiting plates 13 is smaller than the length of the measuring claw. The bottom of the two limiting plates 13 is provided with a groove 14 for engaging the measuring claw of the main scale on one side wall near the limiting groove 12.

[0029] The positioning fixture 2 includes a fixed platform 21, a positioning groove 22 formed on the upper surface of the fixed platform 21 and arranged along the length of the fixed platform 21, a cylinder 23 mounted on the fixed platform 21, a pusher plate 24 fixed to the rod end of the cylinder 23 and extending into the positioning groove 22, a plurality of pressure blocks 25 mounted on the edge of the positioning groove 22 and extending to the top of the positioning groove 22, and guide plates 26 arranged on both sides of the entrance of the positioning groove 22. The two guide plates 26 are arranged above the positioning groove 22 and the distance between them is less than the length of the measuring claw, which is used to limit the position of the measuring claw when the main scale slides along the positioning groove 22.

[0030] The screw conveying mechanism 3 includes two guide rails 31 arranged side by side and a first ball screw 32 installed in the guide rails 31. The base plate 11 is fixed to a first nut 33 threadedly connected to the first ball screw 32. Sliding feet 34 are fixedly provided on both sides of the bottom of the base plate 11 and are slidably arranged on the guide rails 31.

[0031] The pushing mechanism 4 includes a second ball screw 41, a push plate 42, and an inverted U-shaped push rod 43. The second ball screw 41 is driven by a motor. One end of the inverted U-shaped push rod 43 is installed on a second nut 44 threaded onto the second ball screw 41. The push plate 42 is fixedly installed on the other end of the inverted U-shaped push rod 43. The push plate 42 and the measuring claw are attached to and slide in the slot 14. The front and rear vertical rods of the inverted U-shaped push rod 43 slide along the front and rear side walls of the rear limiting plate 13.

[0032] The linkage mechanism 5 includes a sprocket assembly 51, a rack 52, and a gear 53. The rack 52 is fixed to the second nut 44 by a bracket and drives the gear 53 to rotate when it moves with the second nut 44. The rotating gear 53 drives the sprocket assembly 51 to rotate, and the sprocket assembly 51 drives the screw conveyor mechanism 3. The gear 53 is fixed to the housing of the second ball screw 41 by a rotating shaft and a bearing. The sprocket assembly 51 includes a first sprocket, a second sprocket, and a chain. The first sprocket is fixed to the rotating shaft, and the second sprocket is fixed to the first ball screw 32. The first sprocket and the second sprocket are driven by the chain.

[0033] The pushing mechanism 4 pushes the main ruler in the feeding fixture 1 onto the positioning fixture 2. After the pushing mechanism 4 moves away from the positioning fixture 2 and disengages from the feeding fixture 1, it makes a linear reciprocating motion. It also drives the screw conveying mechanism 3 through the linkage mechanism 5, so that the screw conveying mechanism 3 drives the feeding fixture 1 to move back and forth for feeding.

[0034] It should be noted that when the feeding fixture 1 is in front of the screw conveyor mechanism 3, the main scale is fed manually. When feeding, the scale body is aligned with the gap between the two limit plates 13 and inserted. The measuring claws are attached to the right side wall of the two limit plates 13. After the main scale is inserted, it falls into the limit slide groove 12 and engages with the limit slide groove 12. At this time, the feeding preparation is completed.

[0035] Before starting the push mechanism 4, the second nut 44 drives the inverted U-shaped push rod 43 and the push plate 42 to the rightmost end of the second ball screw 41, and the rack 52 meshes with the gear 53. When the motor of the push mechanism 4 is started, the second ball screw 41 drives the second nut 44 and the inverted U-shaped push rod 43 to the left, that is, to move closer to the positioning fixture 2. At this time, the moving second nut 44 simultaneously drives the rack 52 to move, and the rack 52 meshes with the gear 53, thereby realizing the counterclockwise rotation of the gear 53. After the gear 53 rotates, it drives the sprocket group 51 to rotate through the shaft. The sprocket group 51 drives the first ball screw 32 to rotate counterclockwise. The first ball screw 32 drives the loading fixture 1 and the main ruler to move backward through the first nut 33 until the limit slide groove 12 is collinear with the positioning groove 22. At this time, the rack 52... 2. Disengage from gear 53, push plate 42 also moves to the side of measuring claw and fits against the measuring claw, and continues to drive ball screw 41, which drives nut 44 and inverted U-shaped push rod 43 to continue moving to the left. At this time, nut 44 can drive inverted U-shaped push rod 43 and push plate 42 to move to the left. Push plate 42 gradually pushes the measuring claw to move the entire main scale to the left into positioning groove 22. Finally, reverse drive ball screw 41, drive inverted U-shaped push rod 43 and push plate 42 to move to the right until disengage from loading clamp 1, and continue to move to the right. At this time, rack 52 contacts gear 53 and drives gear 53 to rotate clockwise. Gear 53 drives ball screw 32 to rotate clockwise through sprocket group 51, which can drive loading clamp 1 to move forward to feeding station for re-feeding through nut 33.

[0036] The main ruler body is conveyed to the positioning fixture 2 and its front and rear sides are limited by the positioning groove 22. The top of the ruler body is limited by the pressure block 25. The measuring claw is limited by the guide plate 26. Finally, the cylinder 23 is activated so that it pushes the pusher plate 24 so that the two ruler bodies are pressed into the positioning groove 22, and the deep groove processing work can be carried out.

[0037] In addition, in order to shorten the distance of the push plate 42 reciprocating on the right side of the loading clamp 1, that is, to shorten the length of the entire device, the first sprocket and the second sprocket of the sprocket group 51 can be designed with a gear ratio greater than 1. In this way, when the shaft rotates, it can drive the first ball screw 32 to rotate quickly, so as to realize the long-distance reciprocating movement of the loading clamp 1.

[0038] The entire feeding fixture only requires one motor to realize the forward and backward movement of the loading fixture 1 for loading and the pushing of the main ruler into the positioning fixture 2 for unloading. It has a simple structure, low equipment cost, energy saving and environmental protection, and with the clever linkage mechanism 5, the entire loading and unloading process is smooth, which greatly speeds up the processing efficiency. In addition, the mechanical structure of the entire feeding fixture is concentrated on the rear side of the loading fixture 1, and the feeding station is on the front side, which can ensure the safety of workers. Moreover, the entire feeding fixture occupies a small area.

[0039] like Figure 3-4As shown, a lifting door 6 is provided between the loading clamp 1 and the positioning clamp 2. The lifting door 6 includes a door frame 61 and a roller shutter door 62 installed in the door frame 61 through a rotating shaft and a coil spring. The rotating shaft is connected to the first ball screw 32 through a winding rope 7. When the first ball screw 32 drives the loading clamp 1 to move back and forth, it winds up / unwinds the winding rope 7, so that the rotating shaft rotates in the forward and reverse directions to close and open the roller shutter door 62.

[0040] It should be noted that, during deep groove machining at the positioning fixture 2 station, to avoid the impact of machining debris on the loading fixture 1, pushing mechanism 4, screw conveyor mechanism 3, and linkage mechanism 5, a lifting door 6 is installed between the loading fixture 1 and the positioning fixture 2. This lifting door 6 is a roller shutter type, with the roller shutter 62 retracted / unrolled by a rotating shaft and powered by a coil spring during retraction / unrolling. When the first ball screw 32 drives the loading fixture 1 forward to the feeding station, the main ruler at the positioning fixture 2 can then perform deep groove machining. The ball screw 32 drives the winding rope 7 to wind clockwise, causing the shaft to rotate clockwise to unwind, and the roller shutter door 62 to unwind and close, thus isolating the loading clamp 1 and the positioning clamp 2. Conversely, when the first ball screw 32 drives the loading clamp 1 to move to the side of the positioning clamp 2, the first ball screw 32 drives the winding rope 7 to unwind counterclockwise. At this time, the shaft is not under the tension of the winding rope 7 and rotates counterclockwise under the force of the coil spring, which winds up and opens the roller shutter door 62, making it easier to push the main ruler in the loading clamp 1 into the positioning clamp 2.

[0041] In addition to the lifting door 6, a cover can be set on the outside of the positioning fixture 2. The lifting door 6 is installed on the right side wall of the cover. This can achieve the sealing of the entire positioning fixture 2 when the lifting door 6 is closed. The deep groove processing tool and the dust collection equipment can be installed on the top of the inner cavity of the cover and processed inside the cover to prevent dust from splashing and affecting the right side structure.

[0042] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An automatic feeding fixture for machining depth grooves in calipers, characterized in that: It includes a feeding fixture (1), a positioning fixture (2), a screw conveyor mechanism (3), a pushing mechanism (4), and a linkage mechanism (5); among which, The feeding fixture (1) is driven by the screw conveyor mechanism (3) to move the main scale back and forth on one side of the positioning fixture (2); The pushing mechanism (4) pushes the main ruler in the feeding fixture (1) to the positioning fixture (2). After the pushing mechanism (4) moves away from the positioning fixture (2) and disengages from the feeding fixture (1), it makes a linear reciprocating motion. It also drives the screw conveyor mechanism (3) through the linkage mechanism (5), so that the screw conveyor mechanism (3) drives the feeding fixture (1) to move back and forth to feed the material. The loading fixture (1) includes a base plate (11), a limiting groove (12) opened on the upper surface of the base plate (11) and arranged along the length direction of the base plate (11), and two limiting plates (13) mounted on the base plate (11) and symmetrically arranged along the limiting groove (12). The main scale body is inserted into and slides in the limiting groove (12) through the gap between the two limiting plates (13). The gap between the two limiting plates (13) is smaller than the length of the measuring claw. A slot (14) for engaging the measuring claw of the main scale is opened on the side wall of the bottom of the two limiting plates (13) near the limiting groove (12). The positioning fixture (2) includes a fixed platform (21), a positioning groove (22) opened on the upper surface of the fixed platform (21) and arranged along the length of the fixed platform (21), a cylinder (23) installed on the fixed platform (21), a pusher plate (24) fixed to the rod end of the cylinder (23) and extending into the positioning groove (22), a number of pressure blocks (25) installed on the edge of the positioning groove (22) and extending to the top of the positioning groove (22) at one end, and guide plates (26) set on both sides of the entrance of the positioning groove (22). The two guide plates (26) are set above the positioning groove (22) and the distance between them is less than the length of the measuring claw, which is used to limit the position of the measuring claw when the main scale slides along the positioning groove (22). The screw conveying mechanism (3) includes two guide rails (31) arranged side by side and a first ball screw (32) installed in the guide rails (31). The base plate (11) is fixed on a first nut (33) threadedly connected to the first ball screw (32). The bottom sides of the base plate (11) are fixed with sliding feet (34) that are slidably arranged on the guide rails (31). The pushing mechanism (4) includes a second ball screw (41), a push plate (42), and an inverted U-shaped push rod (43). The second ball screw (41) is driven by a motor. One end of the inverted U-shaped push rod (43) is installed on a second nut (44) threaded onto the second ball screw (41). The push plate (42) is fixedly installed on the other end of the inverted U-shaped push rod (43). The push plate (42) slides in the slot (14) with the measuring claw. The front and rear vertical rods of the inverted U-shaped push rod (43) slide along the front and rear side walls of the rear limiting plate (13). The linkage mechanism (5) includes a sprocket assembly (51), a rack (52) and a gear (53). The rack (52) is fixed to the second nut (44) by a bracket and drives the gear (53) to rotate when it moves with the second nut (44). The rotating gear (53) drives the sprocket assembly (51) to rotate, and the sprocket assembly (51) drives the screw conveyor mechanism (3). A lifting door (6) is provided between the loading clamp (1) and the positioning clamp (2). The lifting door (6) includes a door frame (61) and a roller shutter door (62) installed in the door frame (61) via a rotating shaft and a coil spring. The rotating shaft is connected to the first ball screw (32) via a winding rope (7). When the first ball screw (32) drives the loading clamp (1) to move back and forth, it winds up / unwinds the winding rope (7) respectively, so that the rotating shaft rotates in the forward and reverse directions to close and open the roller shutter door (62). The gear (53) is fixed to the housing of the second ball screw (41) by a rotating shaft and bearing. The sprocket assembly (51) includes a first sprocket, a second sprocket and a chain. The first sprocket is fixed to the rotating shaft and the second sprocket is fixed to the first ball screw (32). The first sprocket and the second sprocket are driven by the chain.

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