High-speed high-precision compact machining shaft

Abstract

The utility model provides a high-speed high-precision compact type machining shaft which comprises a shell, an air cylinder arranged in the shell, a motor connected with a telescopic end in the air cylinder, a pressing block connected with an output shaft in the motor and a clamping assembly connected with the other end in the shell, a workpiece is clamped on the clamping assembly, and the pressing block is in separable contact with the clamping assembly. Wherein the motor is a servo motor, the size of the shell can be adjusted, and servo motors of different specifications can be selected to be installed in the shell according to needs so as to meet the high-speed and high-precision requirements in the workpiece machining process. According to the high-speed and high-precision compact machining shaft, the boss of the pressing block slides in the guide groove of the limiting sleeve, the jacking column abuts against and presses the limiting groove of the chuck, multi-point clamping and rotating of a workpiece are achieved through the pressing block, and the clamping and machining effect on the small high-precision workpiece is better.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool processing, and particularly relates to a high-speed, high-precision and compact processing shaft. Background Art

[0002] A machine tool processing shaft, referred to as a machine tool shaft for short, the main functions of the machine tool shaft include transmitting force and torque to drive the movement of the machine tool, enabling the machine tool to perform processing, and controlling the speed and direction of the machine tool movement, so as to achieve different types of processing and process requirements. They are an indispensable part of machine tool equipment such as CNC machine tools, machining centers, lathes, and milling machines, and play a crucial role in ensuring the accuracy and efficiency of machine tool processing. The utility model patent with the publication number CN210189165U discloses a machine tool C-axis structure, including a base, a core shaft, a torque motor, a rotating seat, a rotor bushing, an encoder, and an outer sleeve; the bottom of the core shaft is connected to the base, the top of the core shaft is connected to the rotating seat, and the side of the core shaft is connected to the rotor bushing and the encoder; the torque motor includes a motor rotor and a motor stator, the motor rotor is matched and connected with the rotor bushing, and the motor stator is connected inside the outer sleeve.

[0003] However, in the above prior art, the overall structure of the processing shaft is relatively large, and it is difficult to meet the processing of small and high-precision workpieces. This solution solves this technical problem. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a high-speed, high-precision and compact processing shaft, which is provided with a pressing block connected to a motor. The boss of the pressing block slides along the guiding groove of the limiting sleeve, and the chuck limiting groove is pressed against by a top column. The pressing block realizes multi-point clamping and rotation of the workpiece, and has a better clamping and processing effect on small and high-precision workpieces.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a high-speed, high-precision and compact processing shaft, including a housing, and further including a cylinder arranged in the housing, a motor connected to the telescopic end of the cylinder, a pressing block connected to the output shaft of the motor, and a clamping assembly connected to the other end of the housing. A workpiece is clamped on the clamping assembly, and the pressing block is detachably in contact with the clamping assembly. The motor is a servo motor, and the size of the housing is adjustable. Different specifications of servo motors can be selected to be installed in the housing according to needs to meet the requirements of high speed and high precision in workpiece processing;

[0006] The clamping assembly includes a connecting sleeve detachably arranged on the housing and a clamping unit rotatably arranged in the connecting sleeve. The pressing block is detachably in contact with the clamping unit.

[0007] The clamping unit includes a limiting sleeve rotatably arranged in the connecting sleeve, clamping heads arranged in an array in the limiting sleeve, a support rod connected between two adjacent clamping heads, and the support rod is connected to the limiting sleeve;

[0008] On the inner side of one end of the limiting sleeve, there is a first conical surface, on one side of the clamping head, there is a second conical surface corresponding to the limiting sleeve, on the other side of the clamping head, there is a limiting groove, and the pressing block abuts against the limiting groove.

[0009] On the inner side of the limiting sleeve, a number of guiding grooves are arranged in an array. The pressing block includes a bearing block connected to the motor, convex platforms arranged in an array on the side of the bearing block, the convex platforms are slidably arranged in the guiding grooves, the pressing block further includes ejector posts arranged in an array on the bearing block, and the ejector posts are detachably abutted and arranged in the limiting grooves.

[0010] On the inner side of the housing, a number of sliding grooves are arranged in an array. On the outer side of the housing of the motor, a number of guiding columns are arranged, and the guiding columns are slidably arranged in the sliding grooves.

[0011] A bearing is arranged in the connecting sleeve, and the limiting sleeve is slidably arranged in the connecting sleeve through the bearing.

[0012] The support rod is fixedly arranged in the guiding groove.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] (1) A pressing block connected to the motor is provided. By sliding the convex platform of the pressing block along the guiding groove of the limiting sleeve, and pressing against the limiting groove of the clamping head through the ejector post, multi-point clamping and rotation of the workpiece are realized through the pressing block. The clamping component has a simple structure and a small volume, and has a better clamping and processing effect on small and high-precision workpieces;

[0015] (2) The motor in the housing is a servo motor, with higher precision, stronger stability, and stronger applicability to the processing of small workpieces;

[0016] (3) By arranging a number of sliding grooves in an array on the inner side of the housing, and a number of guiding columns on the outer side of the housing of the motor, and the guiding columns are slidably arranged in the sliding grooves, the operation of the motor is made more stable and the precision of the processing shaft is higher. Description of the Drawings

[0017] Figure 1 is the internal structure schematic diagram of the present utility model;

[0018] Figure 2 is the structure schematic diagram of the clamping component of the present utility model;

[0019] Figure 3It is a schematic diagram of the internal structure of the clamping unit of the present utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the chuck of the present utility model;

[0021] Figure 5 It is a schematic diagram of the combined structure of the ejector pin and the chuck of the present utility model;

[0022] Figure 6 It is a schematic diagram of the structural decomposition of the present utility model.

[0023] Among them, in the figure: 1. Housing; 11. Slide groove; 2. Cylinder; 3. Motor; 31. Guide post; 4. Pressing block; 41. Bearing block; 42. Boss; 43. Ejector pin; 5. Clamping assembly; 51. Connecting sleeve; 52. Clamping unit; 521. Limiting sleeve; 5211. First tapered surface; 5212. Guide groove; 522. Chuck; 5221. Second tapered surface; 5222. Limiting groove; 523. Support rod; 6. Bearing. Specific embodiments

[0024] In order to more clearly illustrate the technical features of this solution, the following elaborates on this solution through specific embodiments.

[0025] See Figures 1 - 4 , a high-speed, high-precision and compact processing shaft, including a housing 1, further including a cylinder 2 arranged in the housing 1, a motor 3 connected to the telescopic end of the cylinder 2, a pressing block 4 connected to the output shaft of the motor 3, and a clamping assembly 5 connected to the other end of the housing 1. A workpiece is clamped on the clamping assembly 5. The pressing block 4 is in separable contact with the clamping assembly 5. Among them, the motor 3 is a servo motor 3, and the size of the housing 1 is adjustable. Different specifications of servo motors 3 can be selected to be installed in the housing 1 according to needs to meet the requirements of high speed and high precision in workpiece processing. The servo motor 3 is implemented by using existing technologies and will not be elaborated here;

[0026] The clamping assembly 5 includes a connecting sleeve 51 detachably arranged on the housing 1 and a clamping unit 52 rotatably arranged in the connecting sleeve 51. The pressing block 4 is in separable contact with the clamping unit 52.

[0027] The clamping unit 52 includes a limiting sleeve 521 rotatably arranged in the connecting sleeve 51 and chucks 522 arranged in an array in the limiting sleeve 521. A support rod 523 is connected between two adjacent chucks 522, and the support rod 523 is connected to the limiting sleeve 521;

[0028] A first tapered surface 5211 is arranged on the inner side of one end of the limiting sleeve 521, a second tapered surface 5221 corresponding to the limiting sleeve 521 is arranged on one side of the chuck 522, a limiting groove 5222 is arranged on the other side of the chuck 522, and the pressing block 4 abuts against the limiting groove 5222.

[0029] A number of guiding grooves 5212 are arranged in an array on the inner side of the limiting sleeve 521. The pressing block 4 includes a bearing block 41 connected to the motor 3 and bosses 42 arranged in an array on the side of the bearing block 41. The bosses 42 are slidably arranged in the guiding grooves 5212. The pressing block 4 further includes ejector posts 43 arranged in an array on the bearing block 41. The ejector posts 43 are detachably abutted and arranged in the limiting grooves 5222.

[0030] A number of sliding grooves 11 are arranged in an array on the inner side of the housing 1. A number of guiding posts 31 are arranged on the outer side of the housing 1 of the motor 3. The guiding posts 31 are slidably arranged in the sliding grooves 11.

[0031] A bearing 6 is arranged in the connecting sleeve 51. The limiting sleeve 521 is slidably arranged in the connecting sleeve 51 through the bearing 6.

[0032] The support rod 523 is fixedly arranged in the guiding groove 5212.

[0033] The specific working process of the present utility model:

[0034] During use, first, the motor 3 is lifted by the air cylinder 2. The motor 3 drives the pressing block 4 to rise. The clamping assembly 5 is sleeved on the outer side of the pressing block 4, so that the bosses 42 of the pressing block 4 enter the guiding grooves 5212, and the connecting sleeve 51 of the clamping assembly 5 is firmly connected to the housing 1, completing the assembly of the processing shaft.

[0035] Insert the workpiece into the chuck 522, and then start the air cylinder 2. The motor 3 continues to drive the bosses 42 of the pressing block 4 to rise along the guiding grooves 5212 until the ejector posts 43 of the pressing block 4 abut against the limiting grooves 5222 of the chuck 522. At this time, the support rod 523 connected to the chuck 522 deforms, and the conical surface two 5221 of the chuck 522 closes along the conical surface one 5211 of the limiting sleeve 521, firmly clamping the workpiece. Start the motor 3. The motor 3 drives the pressing block 4 to rotate. The bosses 42 and ejector posts 43 of the pressing block 4 drive the connecting sleeve 51 and the chuck 522 to move synchronously. At this time, the clamping and rotation of the workpiece are completed, and then the workpiece is processed. After the workpiece is processed, the air cylinder 2 drives the motor 3 to descend. The motor 3 drives the ejector posts 43 of the pressing block 4 to separate from the limiting grooves 5222. The support rod 523 resets, driving the chuck 522 to expand outwards, releasing the workpiece, and finally taking out the workpiece.

[0036] A pressing block 4 connected to the motor 3 is provided. The bosses 42 of the pressing block 4 slide in the guiding grooves 5212 of the limiting sleeve 521. The ejector posts 43 abut against and press the limiting grooves 5222 of the chuck 522. The pressing block 4 realizes multi-point clamping and rotation of the workpiece. The clamping assembly 5 has a simple structure and a small volume, and has a better clamping and processing effect on small and high-precision workpieces.

[0037] The motor 3 inside the housing 1 is a servo motor 3, which has higher precision, stronger stability, and stronger applicability to the processing of small workpieces;

[0038] By arranging a plurality of sliding grooves 11 on the inner side of the housing 1 in an array, and a plurality of guide columns 31 are arranged on the outer side of the housing 1 of the motor 3, and the guide columns 31 are slidably arranged in the sliding grooves 11, the operation of the motor 3 is more stable and the precision of the processing shaft is higher.

[0039] The technical features not described in the present utility model can be realized by or adopted the prior art, and will not be elaborated here. Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model should also belong to the protection scope of the present utility model.

Claims

1. A high-speed, high-precision, compact machining axis, comprising a housing (1), characterized in that: It also comprises a cylinder (2) arranged in the housing (1), a motor (3) connected to the telescopic end of the cylinder (2), a clamping block (4) connected to the output shaft of the motor (3), and a clamping assembly (5) connected to the other end of the housing (1), wherein the clamping assembly (5) clamps a workpiece, and the clamping block (4) is in detachable contact with the clamping assembly (5); The clamping assembly (5) comprises a detachable connecting sleeve (51) arranged on the housing (1), and a clamping unit (52) rotatably arranged in the connecting sleeve (51), and the pressing block (4) is in detachable contact with the clamping unit (52).

2. The high-speed, high-precision, compact machining axis according to claim 1, characterized in that: The clamping unit (52) comprises a limiting sleeve (521) rotatably arranged in the connecting sleeve (51), and clamps (522) arranged in an array in the limiting sleeve (521), a support rod (523) being connected between two adjacent clamps (522), and the support rod (523) being connected to the limiting sleeve (521); A conical surface 1 (5211) is provided on the inner side of one end of the limiting sleeve (521), a conical surface 2 (5221) corresponding to the limiting sleeve (521) is provided on one side of the chuck (522), a limiting groove (5222) is provided on the other side of the chuck (522), and the pressing block (4) abuts against the limiting groove (5222).

3. The high-speed, high-precision, compact machining axis according to claim 2, characterized in that: A plurality of guide grooves (5212) are arranged in an array on the inner side of the limiting sleeve (521); the pressing block (4) comprises a bearing block (41) connected to the motor (3), and bosses (42) arranged in an array on the side of the bearing block (41); the bosses (42) are slidably arranged in the guide grooves (5212); the pressing block (4) further comprises top columns (43) arranged in an array on the bearing block (41); the top columns (43) are detachably abutted and arranged in the limiting grooves (5222).

4. The high-speed, high-precision, compact machining axis according to claim 3, characterized in that: A plurality of slide grooves (11) are arranged in an array on the inner side of the housing (1), and a plurality of guide posts (31) are arranged on the outer side of the housing (1) of the motor (3), wherein the guide posts (31) are slidably arranged in the slide grooves (11).

5. The high-speed, high-precision, compact machining axis according to claim 4, characterized in that: A bearing (6) is disposed in the connecting sleeve (51), and the limiting sleeve (521) is slidably disposed in the connecting sleeve (51) via the bearing (6).

6. The high-speed, high-precision, compact machining axis according to claim 5, characterized in that: The support rod (523) is fixedly disposed in the guide groove (5212).

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