An internal expansion lathe fixture

Abstract

The utility model discloses an inner expansion type lathe fixture relates to the field of inner expansion type fixture, including fixed plate, install rotating mechanism on the fixed plate, the output position fixed mounting of rotating mechanism has the hollow cylinder, the inside installation of hollow cylinder has the pulling mechanism extending to the fixed plate outside, the pulling mechanism is detachably connected with the clamping plate of sliding connection with the hollow cylinder through the connecting mechanism, the tail end of pulling mechanism is equipped with the round hole, the round hole is inserted with the guide rod, one end of hollow cylinder is fixedly connected with the end of guide rod, and another end of hollow cylinder protrudes outward and is rotatably connected with the fixed plate through the bearing. The utility model discloses setting up the connecting mechanism and setting up the guide inclined slot on the clamping plate, can be realized after long -time use, only the replacement of friction position is replaced, and the cost of replacement is relatively lower, and the technical effect of low maintenance cost is realized further.

Description

Technical Field

[0001] This utility model relates to the field of internal expansion clamps, specifically an internal expansion lathe clamp. Background Technology

[0002] When clamping hollow workpieces internally, the common method is to pull a lever to achieve the synchronous movement of multiple internal clamping plates through inclined plane cooperation, thereby achieving the purpose of internal clamping of the workpiece.

[0003] In existing technologies, due to the pressing and fitting of the conical surfaces, varying degrees of wear will occur after prolonged use. In existing technologies, the conical surfaces are integrally molded on the entire surface of the tie rod, which results in higher costs when replacing them. Utility Model Content

[0004] The purpose of this utility model is to provide an internal expansion lathe fixture in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an internal expansion lathe fixture, comprising a fixed plate, a rotating mechanism mounted on the fixed plate, a hollow cylinder fixedly mounted at the output position of the rotating mechanism, a pulling mechanism extending to the outside of the fixed plate mounted inside the hollow cylinder, a clamping plate slidably connected to the hollow cylinder via a connecting mechanism, a circular hole at the tail end of the pulling mechanism, a guide rod inserted into the circular hole, one end of the hollow cylinder fixedly connected to the end of the guide rod, and the other end of the hollow cylinder protruding outward and rotatably connected to the fixed plate via a bearing.

[0006] As a further embodiment of this utility model: the rotating mechanism includes a rotary motor fixedly installed on the outer side of the fixed plate, the output shaft end of the rotary motor is coaxially fixedly connected to a driving gear, a driven gear is meshed on the lower outer wall of the driving gear, and the driven gear is assembled on the outer periphery of one end of the hollow cylinder.

[0007] As a further embodiment of this utility model: the pulling mechanism includes an electric push cylinder fixedly installed on one side of the fixed plate and located below the rotary motor. A connecting plate is fixedly installed at the piston rod end of the electric push cylinder. A connecting rod is fixedly installed on one side of the connecting plate above the electric push cylinder. A pull rod is rotatably installed on the inner circumference of one end of the connecting rod through a bearing. A central frame is fixedly installed at the end of the pull rod away from the connecting rod. A sliding frame is fixedly installed on the outer side of the central frame. A guide groove is opened inside the clamping plate. The guide groove and the sliding frame are detachably connected through a connecting mechanism.

[0008] As a further embodiment of this utility model: the connecting mechanism includes a receiving groove formed on one side of the clamping plate and communicating with the inner cavity of the guide groove. A guide sleeve is inserted into the inner wall of the guide groove. The receiving groove is used to fix the end plate of the guide sleeve. An outwardly protruding insertion screw is integrally formed on two protruding parts of the end plate of the guide sleeve. A through hole for inserting the insertion screw is opened inside the clamping plate. A countersunk hole communicating with the through hole is opened on the other side of the clamping plate.

[0009] As a further embodiment of this utility model: the connecting mechanism further includes a fixing screw that is fixedly connected to the outer side of the sliding frame ear, and the outer side of the screw portion of the fixing screw is threaded with an internal threaded sleeve that is inserted into the sliding frame ear.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a connecting mechanism and a guide groove on the clamping plate, it is possible to replace only the friction position after long-term use, which results in relatively low replacement cost and thus achieves the technical effect of low maintenance cost. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the installation of the inner support rod of this utility model; Figure 4 This is a schematic diagram of the connection mechanism of this utility model. Figure 5 This is a schematic diagram of the docking mechanism of this utility model from another perspective.

[0012] In the diagram: 1. Fixed plate; 2. Hollow cylinder; 3. Tie rod; 4. Connecting rod; 5. Connecting plate; 6. Electric push cylinder; 7. Rotary motor; 8. Clamping plate; 9. Sliding frame; 10. Center frame; 11. Guide rod; 12. Driving gear; 13. Driven gear; 14. Countersunk hole; 15. Guide groove; 16. Receiving groove; 17. Guide sleeve; 18. Through hole; 19. Insertion screw; 20. Internal threaded sleeve; 21. Fixed screw. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-5 In this embodiment of the utility model, an internal expansion lathe fixture includes a fixed plate 1, a rotating mechanism mounted on the fixed plate 1, a hollow cylinder 2 fixedly mounted at the output position of the rotating mechanism, a pulling mechanism extending to the outside of the fixed plate 1 installed inside the hollow cylinder 2, a clamping plate 8 slidably connected to the hollow cylinder 2 via a connecting mechanism, a round hole opened at the tail end of the pulling mechanism, a guide rod 11 inserted into the round hole, one end of the hollow cylinder 2 fixedly connected to the end of the guide rod 11, and the other end of the hollow cylinder 2 protruding outward and rotatably connected to the fixed plate 1 via a bearing.

[0015] In this embodiment: First, when clamping the workpiece internally, the inner wall of the workpiece is fitted onto the outer wall of the hollow cylinder 2. Then, the pulling mechanism is activated, and the pulling mechanism moves outward, pulling multiple clamping plates 8 to move outward synchronously, thus clamping the inner circumference of the workpiece internally. After clamping is completed, the rotating mechanism is activated, and the rotating mechanism drives the hollow cylinder 2 to rotate. When the hollow cylinder 2 rotates, it drives the pulling mechanism to rotate synchronously through the clamping plates 8, thereby realizing the machining of the outer surface of the workpiece by the lathe. After prolonged use, the worn parts of the pulling mechanism can be replaced through the connecting mechanism.

[0016] Please refer to this carefully. Figure 1 and Figure 2 The rotating mechanism includes a rotary motor 7 fixedly installed on the upper part of the outer side of the fixed plate 1. The output shaft end of the rotary motor 7 is coaxially fixedly connected to a drive gear 12. A driven gear 13 meshes with the lower part of the outer wall of the drive gear 12. The driven gear 13 is assembled on the outer periphery of one end of the hollow cylinder 2.

[0017] In this embodiment: after the workpiece is clamped, the rotary motor 7 is started, and the rotary motor 7 drives the drive gear 12 to rotate. The drive gear 12 drives the driven gear 13 to rotate synchronously. The driven gear 13 can drive the hollow cylinder 2 to rotate, and the hollow cylinder 2 can drive the clamping plate 8 that is slidably connected to it to rotate.

[0018] Please refer to this carefully. Figure 1 , Figure 2The pulling mechanism includes an electric push cylinder 6 fixedly installed on one side of the fixed plate 1 and located below the rotary motor 7. A connecting plate 5 is fixedly installed at the end of the piston rod of the electric push cylinder 6. A connecting rod 4 is fixedly installed on one side of the connecting plate 5 above the electric push cylinder 6. A pull rod 3 is rotatably installed on the inner circumference of one end of the connecting rod 4 through a bearing. A central frame 10 is fixedly installed on the end of the pull rod 3 away from the connecting rod 4. A sliding frame 9 is fixedly installed on the outer side of the central frame 10. A guide groove 15 is opened inside the clamping plate 8. The guide groove 15 and the sliding frame 9 are detachably connected through a connecting mechanism.

[0019] In this embodiment: when clamping the workpiece, the electric push cylinder 6 is activated, the electric push cylinder 6 extends, and the connecting rod 4 moves synchronously through the connecting plate 5. The connecting rod 4 can then drive the center frame 10 to move axially through the pull rod 3. When the hollow cylinder 2 rotates, the pull rod 3 and the connecting rod 4 rotate relative to each other, which does not affect the operation of the electric push cylinder 6.

[0020] Please refer to this carefully. Figure 4 and Figure 5 The connecting mechanism includes a receiving groove 16 formed on one side of the clamping plate 8 and communicating with the inner cavity of the guide groove 15. A guide sleeve 17 is inserted into the inner wall of the guide groove 15. The receiving groove 16 is used to fix the end plate of the guide sleeve 17. An outwardly protruding insertion screw 19 is integrally formed on the two protrusions of the end plate of the guide sleeve 17. A through hole 18 for inserting the insertion screw 19 is opened inside the clamping plate 8. A countersunk hole 14 communicating with the through hole 18 is opened on the other side of the clamping plate 8. The connecting mechanism also includes a fixing screw 21 fixedly connected to the outer side of the ear of the sliding frame 9. An internal threaded sleeve 20 that is inserted into the ear of the sliding frame 9 is threadedly connected to the outer side of the screw part of the fixing screw 21.

[0021] In this embodiment: When the pulling mechanism is running for a long time, the hollow cylinder 2 can be removed from the fixed plate 1 and the connecting plate 5 can be separated from the connecting rod 4. After the hollow cylinder 2 is removed, the end of the hollow cylinder 2 can be removed. Then, a wrench is used to connect with the end of the internal threaded sleeve 20 and rotate the internal threaded sleeve 20 to remove the internal threaded sleeve 20. Then, the nut connecting the fixing screw 21 to the ear is removed and the fixing screw 21 is removed. At this time, the sliding frame 9 can be separated from the clamping plate 8. Then, another nut installed in the countersunk hole 14 is removed with a tool to remove the guide sleeve 17. The guide sleeve 17 and the internal threaded sleeve 20, which are friction contact parts, can be removed and replaced.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An internal expansion lathe fixture, comprising a fixing plate (1), characterized in that, A rotating mechanism is installed on the fixed plate (1). A hollow cylinder (2) is fixedly installed at the output position of the rotating mechanism. A pulling mechanism extending to the outside of the fixed plate (1) is installed inside the hollow cylinder (2). The pulling mechanism is detachably connected to a clamping plate (8) that is slidably connected to the hollow cylinder (2) through a connecting mechanism. A round hole is opened at the tail end of the pulling mechanism. A guide rod (11) is inserted into the round hole. One end of the hollow cylinder (2) is fixedly connected to the end of the guide rod (11). The other end of the hollow cylinder (2) protrudes outward and is rotatably connected to the fixed plate (1) through a bearing.

2. The internal expansion lathe fixture according to claim 1, characterized in that, The rotating mechanism includes a rotary motor (7) fixedly installed on the outer side of the fixed plate (1). The output shaft end of the rotary motor (7) is coaxially fixedly connected to a drive gear (12). A driven gear (13) meshes with the lower outer wall of the drive gear (12). The driven gear (13) is assembled on the outer periphery of one end of the hollow cylinder (2).

3. The internal expansion lathe fixture according to claim 2, characterized in that, The pulling mechanism includes an electric push cylinder (6) fixedly installed on one side of the fixed plate (1) and located below the rotary motor (7). A connecting plate (5) is fixedly installed at the piston rod end of the electric push cylinder (6). A connecting rod (4) is fixedly installed on one side of the connecting plate (5) above the electric push cylinder (6). A pull rod (3) is rotatably installed on the inner circumference of one end of the connecting rod (4) through a bearing. A center frame (10) is fixedly installed on the end of the pull rod (3) away from the connecting rod (4). A sliding frame (9) is fixedly installed on the outer side of the center frame (10). A guide groove (15) is opened inside the clamping plate (8). The guide groove (15) and the sliding frame (9) are detachably connected through a connecting mechanism.

4. The internal expansion lathe fixture according to claim 3, characterized in that, The connecting mechanism includes a receiving groove (16) formed on one side of the clamping plate (8) and connected to the inner cavity of the guide groove (15). A guide sleeve (17) is inserted into the inner wall of the guide groove (15). The receiving groove (16) is used to fix the end plate of the guide sleeve (17). Two protruding plug-in screws (19) are integrally formed on the two protrusions of the end plate of the guide sleeve (17). A through hole (18) is provided inside the clamping plate (8) for the plug-in screw (19) to be inserted. A countersunk hole (14) is provided on the other side of the clamping plate (8) and connected to the through hole (18).

5. The internal expansion lathe fixture according to claim 4, characterized in that, The connecting mechanism also includes a fixing screw (21) fixedly connected to the outer side of the ear of the sliding frame (9), and the outer side of the screw portion of the fixing screw (21) is threaded with an internal thread sleeve (20) that is inserted into the ear of the sliding frame (9).

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