Hollow rotary cylinder

Abstract

The utility model provides a hollow rotary cylinder, and belongs to the technical field of rotary cylinders. The rotary cylinder solves the problem that an existing rotary cylinder is not suitable for a vertical lathe. The hollow rotary cylinder comprises a front cylinder body, a rear cylinder body, a middle cylinder barrel and a piston piece and further comprises a shaft sleeve of a hollow structure, a lathe spindle can penetrate through the hollow part, the piston piece is fixedly arranged outside the shaft sleeve, and the front cylinder body, the middle cylinder barrel and the rear cylinder body are structurally matched to form a moving cavity for the piston piece to move in a reciprocating mode. Pipelines communicated with the interior of the moving cavity are arranged in the front cylinder body and the rear cylinder body respectively, the shaft sleeve sequentially penetrates through the front cylinder body, the middle part and the rear cylinder body, the tail end of the shaft sleeve is connected with a lathe driving motor, the front end of the shaft sleeve is provided with a lining convenient for being connected with a lathe chuck, and a bearing piece is further arranged outside the shaft sleeve. The bearing parts are located at the two ends of the piston part respectively, and the piston part is driven by a rotatable shaft sleeve to rotate synchronously. The utility model has the advantages of simple structure and high efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary cylinders, and relates to a rotary oil cylinder, in particular to a hollow rotary cylinder. Background Art

[0002] The rotary cylinder is a power mechanism that provides the tightening and loosening force for the chuck of a CNC lathe. By continuously supplying hydraulic oil or compressed air to the rotary cylinder, it provides the forward and backward pulling forces for the lathe chuck, realizing the loosening and clamping of the workpiece by the lathe chuck.

[0003] The existing rotary cylinders on the market are roughly divided into two categories. One is the hydraulic rotary cylinder, and the other is the pneumatic rotary cylinder. Among them, in the hydraulic rotary cylinder of a vertical lathe, during the use process, due to its structural influence, the oil return is often inconvenient, resulting in oil leakage, and the leakage will further pollute the equipment and the environment. Summary of the Invention

[0004] The purpose of the utility model is to provide a hollow rotary cylinder to solve the above problems for the problems existing in the prior art.

[0005] The purpose of the utility model can be realized by the following technical solutions: A hollow rotary cylinder includes a front cylinder body, a rear cylinder body, an intermediate cylinder barrel and a piston member. It is characterized in that it further includes a sleeve with a hollow structure, and the hollow part can be passed through by the main shaft of the lathe.

[0006] The piston member is fixedly arranged outside the sleeve.

[0007] The front cylinder body, the intermediate cylinder barrel and the rear cylinder body are structurally combined to form a moving cavity for the reciprocating movement of the piston member, and pipelines communicating with the inside of the moving cavity are respectively arranged in the front cylinder body and the rear cylinder body.

[0008] The sleeve sequentially penetrates through the front cylinder body, the middle part and the rear cylinder body, and the end is connected to the lathe driving motor.

[0009] A bushing for facilitating the connection of the lathe chuck is arranged at the front end of the sleeve.

[0010] Bearing members are further arranged outside the sleeve, and the bearing members are respectively located at both ends of the piston member.

[0011] The piston member is driven to rotate synchronously by the rotatable sleeve.

[0012] In the above-mentioned hollow rotary cylinder, the piston member and the sleeve are installed in the hollow rotary cylinder and can rotate synchronously, and the front cylinder body, the rear cylinder body and the intermediate cylinder barrel are non-rotatable.

[0013] In the above-mentioned hollow rotary cylinder, a front cover and a rear cover are respectively arranged on the front cylinder body and the rear cylinder body.

[0014] In the above-mentioned hollow rotary cylinder, the bushing is fixed to the outer end of the front part of the sleeve and rotates synchronously with the sleeve.

[0015] Compared with the prior art, the present hollow rotary cylinder has the following advantages:

[0016] 1. The structure design is simple. By using the structural cooperation of the sleeve, piston part, bearing part and bushing, it is realized that the outside of the rotary cylinder does not rotate, while the inner sleeve and piston part rotate. At the same time, the pipeline structure design can effectively achieve the rapid recovery effect of oil or gas, and it is applicable to vertical and horizontal lathes. Brief Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present hollow rotary cylinder.

[0018] Figure 2 is a half-sectional structural schematic diagram of the present hollow rotary cylinder.

[0019] In the figure, 1, front cylinder body; 2, rear cylinder body; 3, intermediate cylinder barrel; 4, sleeve; 5, pipeline; 6, bearing part; 7, bushing; 8, front cover; 9, rear cover; 10, piston part; 11, moving cavity. Detailed Embodiment

[0020] The following are specific embodiments of the present utility model and in conjunction with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0021] As Figure 1 、 Figure 2 shown, the present hollow rotary cylinder includes a front cylinder body 1, a rear cylinder body 2, an intermediate cylinder barrel 3 and a piston part 10, and further includes a sleeve 4 with a hollow structure, wherein the hollow part can be passed through by the main shaft of the lathe. The piston part 10 is fixedly arranged outside the sleeve 4. The front cylinder body 1, the intermediate cylinder barrel 3 and the rear cylinder body 2 are structurally combined to form a moving cavity 11 for the piston part 10 to reciprocate. Pipelines 5 communicating with the inside of the moving cavity 11 are respectively arranged in the front cylinder body 1 and the rear cylinder body 2. The sleeve 4 sequentially passes through the front cylinder body 1, the middle part and the rear cylinder body 2, wherein the end is connected to the driving motor of the lathe. A bushing 7 facilitating the connection with the lathe chuck is arranged at the front end of the sleeve 4. A bearing part 6 is also arranged outside the sleeve 4, and the bearing part 6 is respectively located at both ends of the piston part 10. The piston part 10 is driven by the rotatable sleeve 4 to rotate synchronously with it.

[0022] The above structural design is simple. By using the structural cooperation of the sleeve 4, the piston part 10, the bearing part 6 and the bushing 7, it is realized that the outside of the rotary cylinder does not rotate, while the inner sleeve 4 and the piston part 10 rotate. At the same time, the pipeline 5 structure design can effectively achieve the rapid recovery effect of oil or gas, and it is applicable to vertical and horizontal lathes.

[0023] The pipelines 5 of the front cylinder block 1 and the rear cylinder block 2 are oil channels or air channels respectively according to whether hydraulic transmission or pneumatic transmission is adopted. This rotary cylinder structure can be used for both hydraulic transmission and pneumatic transmission.

[0024] To elaborate further, in order to enable the sleeve 4 inside the rotary cylinder to rotate while the overall exterior does not rotate, the piston part 10 and the sleeve 4 are installed inside this hollow rotary cylinder and can rotate synchronously. Among them, the front cylinder block 1, the rear cylinder block 2, and the intermediate cylinder barrel 3 are non-rotatable.

[0025] To elaborate further, in order to improve the sealing performance, a front cover 8 and a rear cover 9 are respectively provided on the front cylinder block 1 and the rear cylinder block 2.

[0026] To elaborate further, in order to facilitate the installation of the lathe chuck and at the same time drive the forward and backward pulling forces, the bushing 7 is fixed to the outer end of the front section of the sleeve 4 and rotates synchronously with the sleeve 4.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0028] Although terms such as the front cylinder block 1, the rear cylinder block 2, the intermediate cylinder barrel 3, the sleeve 4, the pipeline 5, the bearing part 6, the bushing 7, the front cover 8, the rear cover 9, the piston part 10, and the moving cavity 11 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A hollow rotary cylinder, comprising a front cylinder block (1), a rear cylinder block (2), an intermediate cylinder barrel (3) and a piston member (10), characterized in that, It further includes a bushing (4) with a hollow structure, wherein the hollow part allows the lathe spindle to pass through; The piston member (10) is fixedly arranged outside the bushing (4); The front cylinder block (1), the intermediate cylinder barrel (3) and the rear cylinder block (2) are structurally combined to form a moving cavity (11) for the reciprocating movement of the piston member (10), and pipelines (5) communicating with the inside of the moving cavity (11) are respectively arranged in the front cylinder block (1) and the rear cylinder block (2); The bushing (4) sequentially penetrates through the front cylinder block (1), the middle part and the rear cylinder block (2), wherein the end is connected to the lathe driving motor; A bushing (7) facilitating the connection with the lathe chuck is arranged at the front end of the bushing (4); A bearing member (6) is further arranged outside the bushing (4), and the bearing member (6) is respectively located at both ends of the piston member (10); The piston member (10) is driven to rotate synchronously by the rotatable bushing (4).

2. The hollow rotary cylinder according to claim 1, wherein, The piston member (10) and the bushing (4) are installed in this hollow rotary cylinder and can perform synchronous rotational movement, wherein the front cylinder block (1), the rear cylinder block (2) and the intermediate cylinder barrel (3) are non-rotatable.

3. A hollow rotary cylinder according to claim 1, characterized in that, Front covers (8) and rear covers (9) are respectively arranged on the front cylinder block (1) and the rear cylinder block (2).

4. A hollow rotary cylinder according to claim 1, characterized in that, The bushing (7) is fixed to the outer end of the front section of the bushing (4) and rotates synchronously with the bushing (4).

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