A pneumatic rotary table

Abstract

This invention provides a pneumatic rotary worktable, belonging to the field of mechanical parts technology. It solves the technical problems of existing pneumatic rotary worktables, such as non-compact drive mechanisms and poor drive stability. This pneumatic rotary worktable includes a spindle sleeve, a cylinder, a spindle body, and a drive component. The spindle body has mounting holes, and the drive component drives the spindle body to rotate. A tie rod sleeve and a tie rod threaded sleeve are respectively provided on the inner and outer sides of the spindle body. The spindle body has an elongated hole. A piston body is formed outside the piston sleeve fitted on the outer side of the tie rod threaded sleeve. The piston body is sealed to the cylinder. Sealing plates formed inward on both sides of the cylinder are sealed to the piston sleeve. Through holes for inward liquid or air intake are provided on the sealing plates or the side walls of the cylinder. This invention combines the axial movement of the tie rod and the circumferential rotation of the spindle body, which not only makes the structure more compact but also improves the motion stability of the tie rod and the spindle body.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical parts, in particular to a pneumatic rotary worktable. Background Art

[0002] At present, in the rotary worktable of the existing gear chamfering machine, the driving mechanism for driving the main shaft to rotate is mostly through a worm gear or gear transmission. The driving shaft is generally on the side of the main shaft, and the hydraulic or pneumatic mechanism for clamping the workpiece is located directly below the main shaft. The two are separate, resulting in the overall driving mechanism structure being not compact and the driving stability being poor. Summary of the invention

[0003] The object of the present invention is to provide a pneumatic rotary table with a more compact structure and higher stability.

[0004] The object of the present invention is achieved in that:

[0005] A pneumatic rotary table, characterized in that it includes a spindle sleeve, a cylinder body and a driving member arranged in sequence from top to bottom, wherein the spindle sleeve and the cylinder body are provided with a spindle body that penetrates both and is rotatably connected to the both, the upper end of the spindle body extends from the upper end of the spindle sleeve, and the driving member drives the spindle body to rotate around the central axis of the spindle body, the spindle body is provided with a mounting hole coaxial with the spindle body, and the inner and outer sides of the spindle body are respectively provided with a pull rod thread sleeve and a pull rod sleeve that can slide axially with the spindle body, The pull rod thread sleeve and the pull rod sleeve are fixed by a cylindrical pin, the main shaft body is provided with a long strip hole which cooperates with the cylindrical pin to enable it to slide in the axial direction, the outer side of the pull rod thread sleeve is provided with a rotatable piston sleeve, the outer side of the piston sleeve is formed with an annular piston body, the outer side of the piston body is sealed with the inner side of the cylinder body, annular sealing plates are formed inwardly on both sides of the cylinder body, the inner side of the sealing plate is sealed with the outer side of the piston sleeve, and the side wall of the sealing plate or the cylinder body is provided with a through hole for liquid or air to enter.

[0006] In the present application, the main shaft body rotates under the drive of the driving member, and the pull rod sleeve and the pull rod sleeve rotate synchronously with the main shaft body. Since the piston sleeve is rotatably connected to the pull rod sleeve, when the main shaft body rotates, the piston sleeve, the piston body and the cylinder body remain circumferentially stationary. The piston body is raised or lowered by injecting liquid or air into the lower side of the piston body in the cylinder body, thereby driving the pull rod connected to the pull rod sleeve to rise or fall, thereby realizing the clamping and loosening of the product. The present invention combines the axial movement of the pull rod with the circumferential rotation structure of the main shaft body, which not only makes the structure more compact, but also makes the movement stability of the pull rod and the main shaft body higher.

[0007] In the above-mentioned pneumatic rotary workbench, the upper end of the tie rod sleeve is formed with an annular boss outwardly, the lower end of the tie rod sleeve is threadedly connected with a nut, and the inner side surface of the piston sleeve is formed with an annular connecting block inwardly, and the connecting block is located between the annular boss and the nut, and bearings are respectively arranged between the connecting block, the annular boss and the nut. The design of the annular boss and the nut can fix the piston sleeve and the tie rod sleeve in the axial direction, and when the piston moves in the axial direction, the tie rod can be driven to move in the axial direction through the tie rod sleeve; the bearing is arranged between the piston sleeve and the tie rod sleeve so that the two can be rotatably connected in the circumferential direction, so that the piston sleeve can rotate in the circumferential direction without following the tie rod sleeve, thereby improving the sealing of the connection between the piston and the side wall of the cylinder body.

[0008] In the above-mentioned pneumatic rotary table, the main shaft body is provided with a first step surface abutting against the upper end of the pull rod sleeve and a second step surface abutting against the upper end of the piston sleeve, and the outer sleeve of the nut is provided with an induction disk, which is fixedly connected to the lower end of the piston sleeve. The design of the above-mentioned first step surface and second step surface can limit the axial upward movement of the piston sleeve, preventing the piston body from contacting the upper wall of the cylinder body or the cylindrical pin from contacting the upper end of the long hole, thereby preventing the deformation of the piston body from affecting the sealing performance or the deformation of the cylindrical pin from affecting the stability of the axial movement.

[0009] In the above-mentioned pneumatic rotary workbench, an annular sealing ring is fixed on the outer side surface of the piston body, and annular sealing rings are provided on the inner side surfaces of the two sealing plates.

[0010] In the above-mentioned pneumatic rotary worktable, the driving part is a motor, the motor is fixedly connected to the main shaft body through a reducer, the reducer is fixedly connected to the lower end of the cylinder body through a reducer base, the upper end of the cylinder body is fixedly connected to the main shaft sleeve, and the main shaft sleeve is fixed on the frame.

[0011] In the above-mentioned pneumatic rotary table, the upper and lower ends of the main shaft sleeve are respectively fixed with an upper bearing cover and a lower bearing cover, the upper end of the main shaft body is sleeved with an upper bearing and a lower bearing arranged vertically at intervals, a bearing spacer is arranged between the upper bearing and the lower bearing, the lower end of the lower bearing abuts against the lower bearing cover, and the upper end of the upper bearing abuts against the upper bearing cover. The design of the above-mentioned bearing structure can make the connection between the bearings more compact, ensuring the stability of the main shaft body when rotating.

[0012] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0013] The main shaft body of the present invention rotates under the drive of the driving member, and the pull rod sleeve and the pull rod sleeve rotate synchronously with the main shaft body. Since the piston sleeve is rotatably connected to the pull rod sleeve, when the main shaft body rotates, the piston sleeve, the piston body and the cylinder body remain circumferentially stationary. The piston body is raised or lowered by injecting liquid or air into the lower side of the piston body in the cylinder body, thereby driving the pull rod connected to the pull rod sleeve to rise or fall, thereby realizing the grasping action. The present invention combines the axial movement of the pull rod with the circumferential rotation structure of the main shaft body, which not only makes the structure more compact, but also makes the movement stability of the pull rod and the main shaft body higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall cross-sectional view of the present invention.

[0015] Figure 2 It is a partial enlarged view of the piston of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the main shaft body of the present invention.

[0017] In the figure, 1, main shaft sleeve; 11, upper bearing cover; 12, upper bearing; 13, bearing spacer; 14, lower bearing; 15, lower bearing cover; 2, cylinder body; 21, piston sleeve; 211, connecting block; 22, piston body; 23, sealing plate; 3, driving member; 4, main shaft body; 41, mounting hole; 42, pull rod thread sleeve; 43, pull rod sleeve; 431, annular boss; 432, nut; 44, cylindrical pin; 45, long hole; 46, first step surface; 47, second step surface; 48, induction plate; 5, bearing. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1 —3:

[0019] The pneumatic rotary table comprises a main shaft sleeve 1, a cylinder body 2 and a driving member 3 which are arranged in sequence from top to bottom. A main shaft body 4 which penetrates the main shaft sleeve 1 and the cylinder body 2 and is rotatably connected to the main shaft sleeve 1 and the cylinder body 2 is provided inside. The upper end of the main shaft body 4 extends out from the upper end of the main shaft sleeve 1. The driving member 3 drives the main shaft body 4 to rotate around the central axis of the main shaft body 4. The main shaft body 4 is provided with a mounting hole 41 which is coaxial with the main shaft body 4. A pull rod sleeve 42 and a pull rod sleeve 43 which can slide axially with the main shaft body 4 are respectively provided on the inner side and the outer side of the main shaft body 4. The pull rod sleeve 42 and the pull rod sleeve 43 are respectively provided on the inner side and the outer side of the main shaft body 4. The rod sleeve 43 is fixed by a cylindrical pin 44, and the main shaft body 4 is provided with a long hole 45 that cooperates with the cylindrical pin 44 to enable it to slide in the axial direction. The outer side of the pull rod thread sleeve 42 is provided with a rotatable piston sleeve 21, and the outer side of the piston sleeve 21 is formed with an annular piston body 22, and the outer side surface of the piston body 22 is sealed and connected to the inner side surface of the cylinder body 2. Annular sealing plates 23 are formed inwardly on both sides of the cylinder body 2, and the inner side surface of the sealing plate 23 is sealed and connected to the outer side surface of the piston sleeve 21. The sealing plate 23 or the side wall of the cylinder body 2 is provided with a through hole for inward liquid or air intake. In the present application, the main shaft body 4 rotates under the drive of the driving member 3, and the pull rod sleeve 42 and the pull rod sleeve 43 rotate synchronously with the main shaft body 4. Since the piston sleeve 21 is rotatably connected to the pull rod sleeve 43, when the main shaft body 4 rotates, the piston sleeve 21, the piston body 22 and the cylinder body 2 remain circumferentially stationary, and the piston body 22 is raised or lowered by injecting liquid or air into the lower side of the piston body 22 in the cylinder body 2, thereby driving the pull rod connected to the pull rod sleeve 42 to rise or fall, thereby realizing the clamping and loosening of the product. The present invention combines the axial movement of the pull rod with the circumferential rotation structure of the main shaft body 4, which can not only make the structure more compact, but also make the movement stability of the pull rod and the main shaft body 4 higher.

[0020] like Figure 2 As shown, the upper end of the rod sleeve 43 is formed with an annular shoulder 431 outwardly, the lower end of the rod sleeve 43 is threadedly connected with a nut 432, the inner side of the piston sleeve 21 is formed with an annular connecting block 211 inwardly, the connecting block 211 is located between the annular shoulder 431 and the nut 432, and a bearing 5 is respectively arranged between the connecting block 211 and the annular shoulder 431 and the nut 432; an annular sealing ring 24 is fixed on the outer side of the piston body 22, and an annular sealing ring 24 is arranged on the inner side of the two sealing plates 23. The design of the annular shoulder 431 and the nut 432 can fix the piston sleeve 21 and the rod sleeve 43 in the axial direction, and when the piston moves in the axial direction, the rod can be driven to move in the axial direction through the rod sleeve 43; the bearing 5 is arranged between the piston sleeve 21 and the rod sleeve 43 so that the two can be rotatably connected in the circumferential direction, so that the piston sleeve 21 can not rotate in the circumferential direction with the rod sleeve 43, and the sealing performance of the connection between the piston and the side wall of the cylinder body 2 is improved.

[0021] like Figure 3As shown, the main shaft body 4 is provided with a first step surface 46 abutting against the upper end of the tie rod sleeve 43 and a second step surface 47 abutting against the upper end of the piston sleeve 21, and the outer sleeve of the nut 432 is provided with an induction disc 48, which is fixedly connected to the lower end of the piston sleeve 21. The design of the first step surface 46 and the second step surface 47 can limit the axial upward movement of the piston sleeve 21, prevent the piston body 22 from contacting the upper wall of the cylinder body 2 or the cylindrical pin 44 from contacting the upper end of the long hole 45, so as to avoid the deformation of the piston body 22 affecting the sealing performance or the deformation of the cylindrical pin 44 affecting the stability of the axial movement.

[0022] like Figure 1 As shown, the driving member 3 is a motor, which is fixedly connected to the main shaft body 4 through a reducer 31, and the reducer 31 is fixedly connected to the lower end of the cylinder body 2 through a reducer seat 32. The upper end of the cylinder body 2 is fixedly connected to the main shaft sleeve 1, and the main shaft sleeve 1 is fixed on the frame 6; the upper end and the lower end of the main shaft sleeve 1 are respectively fixed with an upper bearing cover 11 and a lower bearing cover 15, and the upper end of the main shaft body 4 is sleeved with an upper bearing 12 and a lower bearing 14 arranged vertically at intervals, and a bearing spacer sleeve 13 is arranged between the upper bearing 12 and the lower bearing 14, the lower end of the lower bearing 14 abuts against the lower bearing cover 15, and the upper end of the upper bearing 12 abuts against the upper bearing cover 11. The design of the above-mentioned bearing 5 structure can make the connection between the bearings 5 ​​more compact, thereby ensuring the stability of the main shaft body 4 during rotation.

[0023] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic rotary table, characterized in that: The invention comprises a main shaft sleeve (1), a cylinder body (2) and a driving member (3) which are arranged in sequence from top to bottom, wherein the main shaft sleeve (1) and the cylinder body (2) are provided with a main shaft body (4) which penetrates both of them and is rotatably connected to both of them, the upper end of the main shaft body (4) extends from the upper end of the main shaft sleeve (1), the driving member (3) drives the main shaft body (4) to rotate around the central axis of the main shaft body (4), the main shaft body (4) is provided with a mounting hole (41) which is coaxial with the main shaft body (4), the inner side and the outer side of the main shaft body (4) are respectively provided with a pull rod thread sleeve (42) and a pull rod sleeve (43) which can slide axially with the main shaft body (4), the pull rod thread sleeve (42) and the pull rod sleeve (43) 43) is fixed by a cylindrical pin (44), the main shaft body (4) is provided with a long hole (45) that cooperates with the cylindrical pin (44) so ​​that it can slide in the axial direction, the outer side of the pull rod thread sleeve (42) is provided with a rotatable piston sleeve (21), the outer side of the piston sleeve (21) is formed with an annular piston body (22), the outer side of the piston body (22) is sealed with the inner side of the cylinder body (2), the two sides of the cylinder body (2) are formed with annular sealing plates (23) inwardly, the inner side of the sealing plate (23) is sealed with the outer side of the piston sleeve (21), and the side wall of the sealing plate (23) or the cylinder body (2) is provided with a through hole for inward liquid or air intake; The main shaft body (4) is provided with a first step surface (46) abutting against the upper end of the tie rod sleeve (43) and a second step surface (47) abutting against the upper end of the piston sleeve (21); the lower end of the tie rod sleeve (43) is threadedly connected with a nut (432); the outer side of the nut (432) is provided with an induction disc (48); the induction disc (48) is fixedly connected to the lower end of the piston sleeve (21); The driving member (3) is a motor, the motor is fixedly connected to the main shaft body (4) via a reducer, the reducer is fixedly connected to the lower end of the cylinder body (2) via a reducer seat, the upper end of the cylinder body (2) is fixedly connected to the main shaft sleeve (1), and the main shaft sleeve (1) is fixed on the frame.

2. A pneumatic rotary table according to claim 1, characterized in that: An annular boss (431) is formed outwardly at the upper end of the pull rod sleeve (43), and an annular connecting block (211) is formed inwardly on the inner side surface of the piston sleeve (21). The connecting block (211) is located between the annular boss (431) and the nut (432), and bearings (5) are respectively provided between the connecting block (211) and the annular boss (431) and the nut (432).

3. A pneumatic rotary table according to claim 1 or 2, characterized in that: An annular sealing ring is fixed on the outer side surface of the piston body (22), and annular sealing rings are provided on the inner side surfaces of the two sealing plates (23).

4. A pneumatic rotary table according to claim 1 or 2, characterized in that: An upper bearing cover (11) and a lower bearing cover (15) are fixed to the upper and lower ends of the main shaft sleeve (1), respectively; an upper end portion of the main shaft body (4) is sleeved with an upper bearing (12) and a lower bearing (14) vertically spaced apart; a bearing spacer (13) is arranged between the upper bearing (12) and the lower bearing (14); the lower end of the lower bearing (14) abuts against the lower bearing cover (15), and the upper end of the upper bearing (12) abuts against the upper bearing cover (11).

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