Rotatable front push positioning clamping device

Abstract

The utility model discloses a rotatable front push positioning clamping device belongs to the field of automatic processing, including support, the lower end fixed bearing seat of support has the main shaft that rotates and connects in bearing seat, the transmission wheel that can drive the rotation of main shaft is connected to the upper end of main shaft, and the main shaft center is equipped with the guide hole, and the push rod that can only move axially relative to the main shaft is equipped in the guide hole, the upper end of push rod is rotatably connected with the output of linear drive device, and it can drive push rod to move, the lower end is connected with the guide fixed sleeve of main shaft, and the guide cavity is equipped in the center of guide fixed sleeve lower end, and the positioning cone sleeve that can lift is equipped in the guide cavity, and the positioning cone sleeve upper end is connected with push rod, and the positioning clamp is equipped in the center of positioning cone sleeve, and the positioning clamp upper end is fixed on the guide fixed sleeve, and positioning cone sleeve lifting can drive positioning clamp to tighten clamping or loosen workpiece. The above structure realizes the automatic clamping of workpiece, and does not influence the rotation processing demand after clamping.

Description

Technical Field

[0001] This utility model relates to the field of automated processing, specifically to a rotatable forward positioning and clamping device. Background Technology

[0002] There is a great demand for clamping small cylindrical or tubular workpieces. The current processing method is to first clamp the workpiece on the positioning seat, and then start the positioning seat to rotate, and then process it in conjunction with the machine tool.

[0003] Because the positioning seat needs to rotate, the current positioning seats use mechanical clamping mechanisms to clamp the workpieces. Each clamping and positioning operation is very cumbersome. Since it is impossible to use electrical equipment to automatically clamp the workpieces, the production efficiency cannot keep up with the production demand.

[0004] In view of the problems existing in the prior art, this utility model designs and manufactures a rotatable forward positioning clamping device to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a rotatable forward positioning clamping device that can automatically clamp the workpiece without affecting the rotation processing requirements after clamping.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a rotatable forward-pushing positioning and clamping device includes a bracket, a bearing seat fixed at the lower end of the bracket, a main shaft rotatably connected in the bearing seat, and a transmission wheel connected at the upper end of the main shaft, the transmission wheel being able to drive the main shaft to rotate; The spindle has a guide hole at its center, and a push rod that can only move axially relative to the spindle is provided in the guide hole; A linear drive device is fixed to the upper end of the bracket. The output end of the linear drive device is rotatably connected to the upper end of the push rod. The linear movement of the output end of the linear drive device can drive the push rod to move. The lower end of the spindle is connected to a guide fixing sleeve. The lower end of the guide fixing sleeve has a guide cavity at its center. The guide cavity has a positioning cone sleeve that can be raised and lowered. The upper end of the positioning cone sleeve is connected to a push rod. The center of the positioning cone sleeve has a positioning clamp. The upper end of the positioning clamp is fixed on the guide fixing sleeve. The raising and lowering of the positioning cone sleeve can drive the positioning clamp to tighten or loosen the workpiece.

[0007] Preferably, the positioning fixture includes an elastic gripper, one end of which is provided with several axial slots, and the outer side wall of the axial slot end of the elastic gripper is provided with a conical surface that mates with the positioning cone sleeve.

[0008] Preferably, the upper end of the guide fixing sleeve is provided with a fixing plate, the center of the fixing plate is provided with a threaded hole, and the other end of the elastic gripper is screwed into the threaded hole.

[0009] Preferably, the fixed plate has at least two guide grooves evenly distributed around its circumference, and a guide connecting rod is connected to the guide groove for lifting and lowering. The push rod is connected to the positioning cone sleeve through the guide connecting rod.

[0010] Preferably, the positioning fixture has a clamping cavity at its center, and a positioning sleeve is screwed to the upper end of the clamping cavity. The positioning sleeve has a positioning top shaft that can elastically extend and retract toward the clamping end of the positioning fixture.

[0011] Preferably, the positioning sleeve has a stepped cavity, the upper end of the stepped cavity has a large-diameter guide cavity, and the lower end of the stepped cavity has a small-diameter guide cavity; The upper end of the positioning top shaft is provided with a large-diameter boss, which is guided and slidably engaged with the large-diameter guide cavity, and the positioning top shaft is guided and slidably engaged with the small-diameter guide cavity; A compression spring is provided in the large-diameter guide cavity. One end of the compression spring abuts against the large-diameter boss, and the other end of the compression spring passes through the threaded hole and abuts against the lower end of the push rod.

[0012] Preferably, the guide hole has a large-diameter hole at its lower end, and the push rod has a push rod boss at its lower end. The push rod boss can slide in the large-diameter hole, and the step between the guide hole and the large-diameter hole can restrict the movement of the push rod boss.

[0013] Preferably, the linear drive device is configured as a drive cylinder, and the end of the cylinder rod of the drive cylinder is connected to a connecting ring via a connecting block. The outer wall of the connecting ring is provided with two symmetrical radial guide rods. The bracket includes two upright plates, which are disposed on both sides of the cylinder rod of the drive cylinder. The upright plates are provided with long guide grooves, and the two radial guide rods are respectively guided and slidably engaged with the long guide grooves on the two upright plates. Under the guidance of the radial guide rods and the long guide grooves, the cylinder rod of the drive cylinder can only perform telescopic movements.

[0014] Preferably, the upper end of the push rod extends through the guide hole, and a connecting sleeve is fixedly connected to the upper end of the push rod. The upper end of the connecting sleeve is provided with a connecting cavity, and the connecting cavity is rotatably connected to the connecting block through a thrust bearing.

[0015] Preferably, the end of the connecting block is provided with a groove, and a locking block shaft is connected in the groove, the locking block shaft being engaged with the thrust bearing in a tight ring; The locking block shaft is provided with an axial positioning surface, and the two sides of the tight ring of the thrust bearing can respectively abut against the axial positioning surface and the end face of the connecting block; The bottom of the connecting cavity is provided with a positioning boss, or the bottom of the connecting cavity is provided with a pad with a positioning boss, and the moving ring of the thrust bearing is engaged with the positioning boss; A pressure ring is connected to the outer end face of the connecting cavity, and the inner hole of the pressure ring is smaller than the outer diameter of the thrust bearing.

[0016] The advantages of this utility model are: 1. The push rod of this utility model is rotatably connected to the linear drive device, which ensures that the linear motion of the push rod and the rotation along with the main shaft do not interfere with each other, thereby ensuring the requirements of the clamping and releasing action of the positioning fixture at the lower end of the main shaft and the two rotation actions.

[0017] 2. The threaded hole on the guide fixing sleeve of this utility model allows the upper end of the positioning fixture to be connected with the guide fixing sleeve, thereby allowing the positioning fixture to rotate together with the guide fixing sleeve; the guide groove on the guide fixing sleeve allows the push rod and the positioning cone sleeve to be connected through the guide connecting rod, ensuring that the movement of the push rod can drive the movement of the cone sleeve, and finally the movement of the cone sleeve cooperates with the positioning fixture, so that the positioning fixture can achieve clamping or releasing action.

[0018] 3. After the workpiece is processed, when the positioning fixture is released, the elastically telescopic positioning top shaft can quickly eject the workpiece from the positioning fixture, realizing automatic unloading of the workpiece after processing; when processing begins, the workpiece positioning seat below the device rises and transfers the workpiece into the positioning fixture, which can compress the positioning top shaft and does not affect the transfer of the workpiece into the positioning fixture.

[0019] 4. When a linear drive device uses a drive cylinder, the rotation of the cylinder rod is avoided by using a long guide groove and a radial guide rod. The cylinder rod end and the push rod end are connected by a thrust bearing, which prevents the push rod from driving the cylinder rod to rotate. Instead, the push rod can only be moved by the extension and retraction of the cylinder rod. Attached Figure Description

[0020] Figure 1 A cross-sectional view of a rotatable forward positioning and clamping device; Figure 2 This is a schematic diagram of a rotatable forward-pushing positioning and clamping device. Figure 3 A front view of a rotatable push-positioning clamping device; Figure 4 This is a cross-sectional view of the positioning fixture of this utility model; Figure 5 This is a sectional view of the bearing housing of this utility model; Figure 6 This is a cross-sectional view of the thrust bearing of this utility model.

[0021] In the diagram: 1. Bracket; 2. Drive wheel; 3. Main shaft; 4. Push rod; 5. Bearing housing; 6. Guide fixing sleeve; 7. Positioning cone sleeve; 8. Positioning fixture; 9. Connecting sleeve; 10. Thrust bearing; 11. Long guide groove; 12. Radial guide rod; 13. Linear drive device; 14. Positioning sleeve; 15. Positioning top shaft; 16. Compression spring; 17. Large diameter boss; 18. Large diameter guide cavity; 19. External threaded locking ring; 20. Connecting block; 21. Locking block shaft; 22. Pressure ring; 23. Pad; 31. Large diameter hole; 41. Push rod boss; 51. Bearing housing shell; 52. Bearing; 53. Bearing housing cover; 54. Spacer; 55. Locking nut. Detailed Implementation

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 6 As shown, a rotatable forward positioning and clamping device includes a bracket 1, a bearing seat 5 fixed at the lower end of the bracket 1, a main shaft 3 rotatably connected in the bearing seat 5, a transmission wheel 2 connected at the upper end of the main shaft 3, the transmission wheel 2 can drive the main shaft 3 to rotate, the transmission wheel 2 is preferably a synchronous belt pulley, and the transmission wheel 2 and the main shaft 3 are connected by a flat key. The bearing housing 5 of this utility model has a specific structure including a bearing housing shell 51, such as... Figure 5 As shown, the bearing housing shell 51 is fixed to the bracket 1 by a connector. Bearings 52 are provided at both ends of the bearing housing shell 51, and the bearings 52 at both ends are separated by a spacer 54. A bearing housing cover 53 is connected to the lower end of the bearing housing shell 51, limiting the bearing 52 at the lower end of the bearing housing 5. A spacer 54 is provided between the bearing 52 at the upper end of the bearing housing 5 and the transmission wheel 2. Preferably, a locking nut 55 is provided on the other side of the transmission wheel 2 to axially limit its movement. The above structure is mainly to ensure the stable rotation of the main shaft 3 driven by the transmission wheel 2. The specific shape of the bearing housing 5 is not limited.

[0024] The rotation of the spindle 3 often affects the driving components (such as the drive cylinder and motor) that drive the fixture to clamp the workpiece, and its air pipe or power cord cannot rotate with the spindle 3. In order to solve the above problems, this utility model provides a guide hole in the center of the spindle 3, and a push rod 4 that can only move axially relative to the spindle 3 is provided in the guide hole.

[0025] The guide hole can be a non-circular hole, and the corresponding push rod 4 can be a column with the same shape as the guide hole. As long as it can be ensured that the push rod 4 can only move axially relative to the main shaft 3, and to ensure the sliding stability of both, it is preferable to set a corresponding lubrication groove on the push rod 4, and add lubricating medium to the lubrication groove.

[0026] The movement of push rod 4 is aided by linear drive device 13. Specifically, linear drive device 13 is fixed at the upper end of bracket 1. The output end of linear drive device 13 is rotatably connected to the upper end of push rod 4, which prevents push rod 4 from driving linear drive device 13 to rotate when it rotates with spindle 3. The linear movement of the output end of linear drive device 13 can only drive push rod 4 to move.

[0027] The movement of push rod 4 can drive the clamp at the lower end of spindle 3 to clamp or release. Specifically, the structure is that a guide fixing sleeve 6 is connected to the lower end of spindle 3. The guide fixing sleeve 6 can rotate with spindle 3. A guide cavity is provided at the center of the lower end of the guide fixing sleeve 6. A positioning cone sleeve 7 that can be raised and lowered is provided in the guide cavity. The upper end of the positioning cone sleeve 7 is connected to push rod 4.

[0028] like Figure 4 As shown, the positioning cone sleeve 7 has a positioning clamp 8 at its center. The upper end of the positioning clamp 8 is fixed on the guide fixing sleeve 6. The push rod 4 drives the positioning cone sleeve 7 to move. The lifting and lowering of the positioning cone sleeve 7 can drive the positioning clamp 8 to tighten or loosen the workpiece.

[0029] The positioning clamp 8 specifically includes an elastic gripper. One end of the elastic gripper is provided with several axial slots. The outer side wall of the axial slot end of the elastic gripper is provided with a conical surface that mates with the positioning cone sleeve 7. In this way, the positioning cone sleeve 7 will deform the elastic gripper by mates with the conical surface.

[0030] The guide fixing sleeve 6 of this utility model has a fixing plate at the upper end, and a threaded hole in the center of the fixing plate. The other end of the elastic gripper is screwed into the threaded hole, so that the upper end of the positioning clamp 8 can be connected with the guide fixing sleeve 6, thereby allowing the positioning clamp 8 to rotate together with the guide fixing sleeve 6.

[0031] At least two guide grooves are evenly distributed around the circumference of the fixed plate. A guide connecting rod is connected to the guide lifting in the guide groove. The push rod 4 and the positioning cone sleeve 7 are connected through the guide connecting rod, which ensures that the movement of the push rod 4 can pass through the fixed plate and drive the positioning cone sleeve 7 to move. Finally, the movement of the positioning cone sleeve 7 cooperates with the positioning clamp 8, so that the positioning clamp 8 can realize the clamping or releasing action.

[0032] The positioning fixture 8 of this utility model has a clamping cavity in the center, and a positioning sleeve 14 is screwed to the upper end of the clamping cavity. In order to prevent the positioning sleeve 14 from rotating, it is preferable to screw an external thread locking ring 19 to the upper end of the positioning sleeve 14. There is a gap between the lower end face of the positioning sleeve 14 and the lower end face of the positioning fixture 8 to ensure the clamping space of the workpiece.

[0033] The positioning sleeve 14 is equipped with a positioning top shaft 15 that can elastically extend and retract towards the clamping end of the positioning fixture 8. The positioning top shaft 15 can be compressed into the positioning sleeve 14. The elastically extending positioning top shaft 15 can quickly eject the workpiece from the positioning fixture 8, realizing automatic unloading after the workpiece is processed. When processing begins, the workpiece positioning seat below the device rises and transfers the workpiece into the positioning fixture 8. The positioning top shaft 15 can be compressed without affecting the transfer of the workpiece into the positioning fixture 8.

[0034] The elastic telescopic positioning top shaft 15 is specifically achieved through the following structure: the positioning sleeve 14 has a stepped cavity, the upper end of the stepped cavity has a large-diameter guide cavity 18, the lower end of the stepped cavity has a small-diameter guide cavity, the upper end of the positioning top shaft 15 has a large-diameter boss 17, the large-diameter boss 17 and the large-diameter guide cavity 18 are guided and slidably engaged, the positioning top shaft 15 and the small-diameter guide cavity are guided and slidably engaged, the large-diameter guide cavity 18 has a compression spring 16, one end of the compression spring 16 abuts against the large-diameter boss 17, and the other end of the compression spring 16 passes through the threaded hole and abuts against the lower end of the push rod 4, or it can abut against the external threaded locking ring 19.

[0035] The downward limit position of the push rod 4 of this utility model can be achieved by the fixing plate of the guide fixing sleeve 6. In order to limit the upward limit position of the push rod 4, the following structure is used. Specifically, a large diameter hole 31 is provided at the lower end of the guide hole, and a push rod boss 41 is provided at the lower end of the push rod 4. The push rod boss 41 can slide in the large diameter hole 31. The step between the guide hole and the large diameter hole 31 can limit the movement of the push rod boss 41.

[0036] The linear drive device 13 of this utility model is preferably configured as a drive cylinder. The end of the cylinder rod of the drive cylinder is connected to a connecting ring via a connecting block 20. The outer wall of the connecting ring is provided with two symmetrical radial guide rods 12. The bracket 1 specifically includes two upright plates, which are arranged on both sides of the cylinder rod of the drive cylinder. The upright plates are provided with long guide grooves 11. The two radial guide rods 12 are respectively guided and slidably engaged with the long guide grooves 11 on the two upright plates. Under the guidance of the radial guide rods 12 and the long guide grooves 11, the cylinder rod of the drive cylinder can only perform extension and retraction movements.

[0037] The upper end of the push rod 4 extends through a guide hole, and a connecting sleeve 9 is fixedly connected to the upper end of the push rod 4. The upper end of the connecting sleeve 9 has a connecting cavity, and the connecting cavity and the connecting block 20 are rotatably connected through a thrust bearing 10. This avoids the push rod 4 from driving the cylinder rod to rotate, and only allows the push rod 4 to move through the extension and retraction of the cylinder rod.

[0038] Specifically, such as Figure 6As shown, the end of the connecting block 20 is provided with a recess, in which a locking block shaft 21 is connected. The locking block shaft 21 is engaged with the tight ring of the thrust bearing 10. The locking block shaft 21 is provided with an axial positioning surface. The two sides of the tight ring of the thrust bearing 10 can respectively abut against the axial positioning surface and the end face of the connecting block 20. The bottom of the connecting cavity of this utility model is provided with a positioning boss, or the bottom of the connecting cavity is provided with a pad 23 with a positioning boss, and the moving ring of the thrust bearing 10 is engaged with the positioning boss. A pressure ring 22 is connected to the outer end face of the connecting cavity, and the inner hole of the pressure ring 22 is smaller than the outer diameter of the thrust bearing 10.

[0039] The specific processing steps of this utility model are as follows: (1). After the positioning seat of the positioning workpiece receives the workpiece, the positioning seat drives the workpiece to rise. The workpiece will first abut against the positioning top shaft 15, then compress the positioning top shaft 15 upward, and then the workpiece enters the positioning fixture 8. (2). The cylinder rod of the drive cylinder extends and drives the push rod 4 to move down. The push rod 4 will drive the positioning cone sleeve 7 to move down. The movement of the positioning cone sleeve 7 cooperates with the positioning fixture 8, so that the positioning fixture 8 can clamp the workpiece. The clamping force of the positioning fixture 8 can be adjusted by the extension and retraction length of the drive cylinder. (3). The transmission wheel 2 drives the main shaft 3 to rotate, and the main shaft 3 drives the push rod 4 to rotate. Since the upper end of the push rod 4 is rotatably connected to the cylinder rod of the drive cylinder through the thrust bearing 10, it will not drive the cylinder rod to rotate. Since the main shaft 3 and the push rod 4 rotate synchronously, the guide fixing sleeve 6 and the positioning fixture 8 connected to the main shaft 3 also rotate synchronously, realizing the rotation processing of the workpiece. (4). After the workpiece is rotated and processed, the spindle 3 stops rotating, the cylinder rod of the drive cylinder retracts, the push rod 4 moves upward, the positioning cone sleeve 7 connected to the push rod 4 disengages from the positioning fixture 8, the positioning fixture 8 no longer holds the workpiece, and the workpiece is ejected from the positioning fixture 8 under the action of the elastically telescopic positioning top shaft 15, and then waits for the next workpiece to be transferred to the positioning fixture 8.

[0040] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A rotatable front push positioning chucking device, characterized by, Includes a bracket (1), with a bearing seat (5) fixed at the lower end of the bracket (1), a main shaft (3) rotatably connected in the bearing seat (5), and a transmission wheel (2) connected at the upper end of the main shaft (3), the transmission wheel (2) being able to drive the main shaft (3) to rotate; The main shaft (3) has a guide hole at its center, and a push rod (4) that can only move axially relative to the main shaft (3) is provided in the guide hole. A linear drive device (13) is fixed at the upper end of the bracket (1). The output end of the linear drive device (13) is rotatably connected to the upper end of the push rod (4). The linear movement of the output end of the linear drive device (13) can drive the push rod (4) to move. The lower end of the main shaft (3) is connected to a guide fixing sleeve (6). The lower end of the guide fixing sleeve (6) is provided with a guide cavity. The guide cavity is provided with a positioning cone sleeve (7) that can be raised and lowered. The upper end of the positioning cone sleeve (7) is connected to the push rod (4). The center of the positioning cone sleeve (7) is provided with a positioning clamp (8). The upper end of the positioning clamp (8) is fixed on the guide fixing sleeve (6). The raising and lowering of the positioning cone sleeve (7) can drive the positioning clamp (8) to tighten or loosen the workpiece.

2. A rotatable front push positioning and clamping device according to claim 1, characterized in that The positioning clamp (8) includes an elastic gripper, one end of which is provided with several axial slots, and the outer side wall of the axial slot end of the elastic gripper is provided with a conical surface that cooperates with the positioning cone sleeve (7).

3. A rotatable front push positioning and clamping device according to claim 2, characterized in that The upper end of the guide fixing sleeve (6) is provided with a fixing plate, the center of the fixing plate is provided with a threaded hole, and the other end of the elastic claw is screwed into the threaded hole.

4. A rotatable front push positioning and clamping device according to claim 3, characterized in that The fixed plate has at least two guide grooves evenly distributed around its circumference. The guide grooves are connected to guide lifting rods. The push rod (4) is connected to the positioning cone sleeve (7) through the guide connecting rods.

5. A rotatable front push positioning and clamping device according to claim 4, characterized in that The positioning clamp (8) has a clamping cavity at its center, and a positioning sleeve (14) is screwed to the upper end of the clamping cavity. The positioning sleeve (14) has a positioning top shaft (15) that can elastically extend and retract toward the clamping end of the positioning clamp (8).

6. A rotatable front push positioning and clamping device according to claim 5, characterized in that The positioning sleeve (14) is provided with a stepped cavity, the upper end of the stepped cavity is provided with a large-diameter guide cavity (18), and the lower end of the stepped cavity is provided with a small-diameter guide cavity; The upper end of the positioning top shaft (15) is provided with a large diameter boss (17), the large diameter boss (17) is guided and slidably engaged with the large diameter guide cavity (18), and the positioning top shaft (15) is guided and slidably engaged with the small diameter guide cavity; A compression spring (16) is provided in the large-diameter guide cavity (18). One end of the compression spring (16) abuts against the large-diameter boss (17), and the other end of the compression spring (16) passes through the threaded hole and abuts against the lower end of the push rod (4).

7. The rotatable front push positioning and clamping device of claim 1, wherein, The guide hole has a large diameter hole (31) at its lower end, and the push rod (4) has a push rod boss (41) at its lower end. The push rod boss (41) can slide in the large diameter hole (31), and the step between the guide hole and the large diameter hole (31) can restrict the movement of the push rod boss (41).

8. The rotatable front push positioning and clamping device of claim 1, wherein, The linear drive device (13) is configured as a drive cylinder. The end of the cylinder rod of the drive cylinder is connected to a connecting ring through a connecting block (20). The outer wall of the connecting ring is provided with two symmetrical radial guide rods (12). The bracket (1) includes two upright plates, which are arranged on both sides of the cylinder rod of the drive cylinder. The upright plates are provided with long guide grooves (11), and the two radial guide rods (12) are respectively guided and slidably engaged with the long guide grooves (11) on the two upright plates. Under the guidance of the radial guide rods (12) and the long guide grooves (11), the cylinder rod of the drive cylinder can only perform telescopic movements.

9. A rotatable forward-pushing positioning and clamping device according to claim 8, characterized in that, The upper end of the push rod (4) extends through the guide hole, and the upper end of the push rod (4) is fixedly connected to the connecting sleeve (9). The upper end of the connecting sleeve (9) is provided with a connecting cavity, and the connecting cavity and the connecting block (20) are rotatably connected by a thrust bearing (10).

10. A rotatable forward-pushing positioning and clamping device according to claim 9, characterized in that, The end of the connecting block (20) is provided with a groove, and a locking block shaft (21) is connected in the groove. The locking block shaft (21) is in tight ring engagement with the thrust bearing (10). The locking block shaft (21) is provided with an axial positioning surface, and the two sides of the tight ring of the thrust bearing (10) can respectively abut against the axial positioning surface and the end face of the connecting block (20); The bottom of the connecting cavity is provided with a positioning boss, or the bottom of the connecting cavity is provided with a pad (23) with a positioning boss, and the moving ring of the thrust bearing (10) cooperates with the positioning boss; A pressure ring (22) is connected to the outer end face of the connecting cavity, and the inner hole of the pressure ring (22) is smaller than the outer diameter of the thrust bearing (10).

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