Cover-shaped workpiece positioning and clamping device

Abstract

The cover-shaped workpiece positioning and clamping device comprises a seat body, clamping devices and driving devices, the seat body comprises a supporting seat and a base, the supporting seat is located above the base, the upper portion of the base is connected with the supporting seat, cavities which are communicated with each other are formed in the base and the supporting seat, clamping mechanisms are arranged in the cavities, and the driving devices are arranged at the two ends of the base; the driving device comprises a first driving mechanism and a second driving mechanism, and the first driving mechanism and the second driving mechanism are used for driving the clamping mechanism to clamp the cover-shaped workpiece. Through the synergistic effect of the two driving mechanisms, the movement of the upper clamping mechanism and the lower clamping mechanism in the radial direction of the vertical shaft of the outer rotating rod can be accurately controlled, and uniform distribution of clamping force is ensured; and by means of the design of the extrusion face with the gradient changing and the rotation limiting protruding part, the friction force between the clamping assembly and the workpiece is enhanced, and the clamping reliability is improved.

Description

Technical Field

[0001] This utility model relates to clamping devices, specifically to a cap-shaped workpiece positioning and clamping device. Background Technology

[0002] Chinese patent disclosure discloses an internal centering and clamping mechanism for large workpieces, application number 201410755461.X. This mechanism drives a transmission helical gear to rotate via a motor or other drive mechanism, which in turn drives a driven helical gear. Since the driven helical gear is keyed to a vertical screw and secured with a nut, it drives the vertical screw to rotate simultaneously. Because two threaded sleeves connected to the vertical screw are slidably connected in a guide groove, the threaded sleeves can only slide up and down within the guide groove under the rotation of the vertical screw.

[0003] Although the internal centering and clamping mechanism of this large workpiece can adjust the radial movement of the expansion pin, it still has the following drawbacks: since the two threaded sleeves are both threadedly connected to a screw, and the wear of each expansion pin is different, it is very difficult to adjust one screw to adjust the two expansion pins so that neither expansion pin protrudes to the specified length. It is also difficult to ensure that the support surfaces of the two expansion pins reach the specified positions after adjusting one screw, resulting in a large adjustment operation difficulty. Utility Model Content

[0004] This utility model aims to provide a cap-shaped workpiece positioning and clamping device, which solves the problem in the prior art that it is difficult to achieve the support surfaces of both expansion pins reaching the designated position after adjusting one screw.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a cap-shaped workpiece positioning and clamping device, comprising: a base, a clamping device, and a driving device.

[0006] The base includes a support base and a base. The support base is located above the base, and the support base is connected to the base. Both the base and the support base have interconnected cavities. A clamping mechanism is provided in the cavity. A driving device is provided at both ends of the base.

[0007] The driving device includes a first driving mechanism and a second driving mechanism, which are used to drive the clamping mechanism to clamp the cap-shaped workpiece.

[0008] The clamping mechanism includes a rotating mechanism and a clamping assembly. The rotating mechanism is located in the cavity and can rotate relative to the base along a vertical axis. The upper side of the rotating mechanism is provided with a clamping assembly. There are at least two clamping assemblies. The clamping assemblies are mounted on the support base and can move radially relative to the support base. The rotating mechanism is used to press the clamping assemblies to contact the inner wall of the side of the cover-shaped workpiece.

[0009] Of the two clamping assemblies, the upper clamping assembly is the upper clamping mechanism, and the lower clamping assembly is the lower clamping mechanism. The upper clamping mechanism and the lower clamping mechanism are separated by a distance in the vertical direction.

[0010] The rotating mechanism includes an inner rotating rod and an outer rotating rod. The outer rotating rod is sleeved on the inner rotating rod. The inner rotating rod is used to drive the upper clamping mechanism to move radially relative to the support seat. The outer rotating rod is used to drive the lower clamping mechanism to move radially relative to the support seat. A first driven gear is arranged around the bottom of the outer rotating rod, and a second driven gear is arranged around the bottom of the inner rotating rod. The first driven gear meshes with the output end of the first driving mechanism, and the second driven gear meshes with the output end of the second driving mechanism.

[0011] Preferably, both the first drive mechanism and the second drive mechanism include: a rotating handle, a rotating rod, and a bevel gear. The bevel gear is the output end of the first drive mechanism. The rotating handle extends through the side of the base and into the cavity, with one end connected to the rotating rod. The other end of the rotating rod is connected to the bevel gear, which meshes with either the first driven gear or the second driven gear.

[0012] Preferably, the inner rotating rod is surrounded by a first extrusion assembly for extruding the upper clamping mechanism, and the outer rotating rod is surrounded by a second extrusion assembly for extruding the lower clamping mechanism.

[0013] Preferably, the first extrusion assembly includes: a first extrusion ring, which is sleeved on the top of the inner rotating rod;

[0014] The first extrusion assembly includes: a second extrusion ring, which is sleeved on the top of the outer rotating rod. The inner side walls of both the first and second extrusion rings have limited rotation protrusions. Both the inner and outer rotating rods have limited rotation grooves for the limited rotation protrusions to be inserted.

[0015] Preferably, the surface of the first extrusion ring that is in close contact with the end of the upper clamping mechanism is the first extrusion surface, and the surface of the second extrusion ring that is in close contact with the end of the lower clamping mechanism is the second extrusion surface. Both the first extrusion surface and the second extrusion surface are sloped surfaces with a gradient change in the radial direction of the support base.

[0016] Preferably, the support base is provided with a support block at the top, which is used to support the inner wall of the top of the cap-shaped workpiece.

[0017] Preferably, a ball bearing is provided between the outer rotating rod and the support base, and the outer rotating rod can rotate relative to the base in the vertical direction through the ball bearing.

[0018] Compared with the prior art, this utility model has the following advantages: This cap-shaped workpiece positioning and clamping device drives the outer rotating rod and the inner rotating rod to rotate through the rotation of the first driving mechanism and the second driving mechanism. Through the synergistic action of the two driving mechanisms, the movement of the upper clamping mechanism and the lower clamping mechanism in the radial direction of the vertical axis of the outer rotating rod can be precisely controlled, ensuring the uniform distribution of clamping force. It also enables the separate adjustment of the protrusion length of the upper clamping mechanism and the lower clamping mechanism when the wear of the upper clamping mechanism and the lower clamping mechanism is different, thereby meeting different adjustment needs and making adjustment convenient. At the same time, the design of the pressure surface with varying slope and the rotation limiting protrusion enhances the friction between the clamping components and the workpiece, improving the reliability of clamping.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of a cap-shaped workpiece positioning and clamping device.

[0021] Figure 2 This is a schematic diagram of the extrusion assembly.

[0022] Reference numerals: 1. Base body; 11. Support seat; 111. Support block; 12. Base; 2. Clamping device; 21. Rotating mechanism; 21. Inner rotating rod; 211. Second driven gear; 2111. Outer rotating rod; 212. First driven gear; 2121. Clamping assembly; 22. Upper clamping mechanism; 221. Lower clamping mechanism; 222. Driving device; 3. First driving mechanism; 31. Rotating handle; 311. Rotating rod; 312. Bevel gear; 313. Second driving mechanism; 32. Ball bearing; 4. First extrusion assembly; 5. First extrusion ring; 51. Rotation limiting protrusion; 512. Rotation limiting groove; 52. First extrusion surface; 6. Second extrusion assembly. Detailed Implementation

[0023] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1 to 2As shown, this utility model proposes a cap-shaped workpiece positioning and clamping device, including: a base 1, a clamping device 2, and a driving device 3. The base 1 includes: a support base 11 and a base 12. The support base 11 is located above the base 12, and the support base 11 is connected to the top of the base 12. Both the base 12 and the support base 11 have interconnected cavities, and a clamping mechanism is provided in each cavity. The base 12 has driving devices 3 at both ends. The driving device 3 includes: a first driving mechanism 31 and a second driving mechanism 32, which are used to drive the clamping mechanism to clamp the cap-shaped workpiece. The clamping mechanism includes: a rotating mechanism 21 and a clamping assembly 22. The rotating mechanism 21 is located in the cavity and can rotate relative to the base 12 along a vertical axis. The upper side of the rotating mechanism 21 is provided with a clamping assembly 22. There are at least two clamping assemblies 22, which are mounted on the support base 11 and can clamp relative to the support base 11. The rotating mechanism 21 moves radially upwards and is used to press the clamping assembly 22 to contact the inner wall of the side of the cover-shaped workpiece. Among the two clamping assemblies 22, the upper clamping assembly 22 is the upper clamping mechanism 221, and the lower clamping assembly 22 is the lower clamping mechanism 222. The upper clamping mechanism 221 and the lower clamping mechanism 222 are separated in the vertical direction. The rotating mechanism 21 includes an inner rotating rod 211 and an outer rotating rod 212. The outer rotating rod 212 is sleeved on the inner rotating rod 211. The inner rotating rod 211 is used to drive the upper clamping mechanism to move radially relative to the support seat 11, and the outer rotating rod 212 is used to drive the lower clamping mechanism to move radially relative to the support seat 11. A first driven gear 2121 is arranged around the bottom of the outer rotating rod 212, and a second driven gear 2111 is arranged around the bottom of the inner rotating rod 211. The first driven gear 2121 meshes with the output end of the first driving mechanism 31, and the second driven gear 2111 meshes with the output end of the second driving mechanism 32. The inner rotating rod 211 and the outer rotating rod 212 in the rotating mechanism 21 are driven by the first and second driving mechanisms 32 at both ends of the base 12, respectively. These two rotating rods are driven by the driven gear at the bottom and mesh with the output end of the driving mechanism to achieve rotation. The inner rotating rod 211 is responsible for driving the upper clamping mechanism (upper clamping mechanism 221), while the outer rotating rod 212 is responsible for driving the lower clamping mechanism (lower clamping mechanism 222), so that they can move radially relative to the support base 11 to clamp or release the cap-shaped workpiece.

[0025] Both the first drive mechanism 31 and the second drive mechanism 32 include: a rotating handle 311, a rotating rod 312, and a bevel gear 313. The bevel gear 313 is the output end of the first drive mechanism 31. The rotating handle 311 extends through the side of the base 12 into the cavity, with one end connected to the rotating rod. The other end of the rotating rod is connected to the bevel gear 313. The bevel gear 313 meshes with either the first driven gear 2121 or the second driven gear 2111. By rotating the handle 311, the rotating rod is driven, thereby causing the bevel gear 313 to mesh with the driven gear, driving the clamping assembly 22 to move radially along the support base 11, thus achieving rapid clamping and release of the cap-shaped workpiece.

[0026] The inner rotating rod 211 is surrounded by a first pressing assembly 5, which is used to press the upper clamping mechanism 221. The outer rotating rod 212 is surrounded by a second pressing assembly 6, which is used to press the lower clamping mechanism 222. The first pressing assembly 5 surrounding the inner rotating rod 211 and the second pressing assembly 6 surrounding the outer rotating rod 212 correspond to the upper clamping mechanism 221 and the lower clamping mechanism 222, respectively. Driven by the rotational force of the rotating mechanism 21, radial pressing is achieved on the upper clamping mechanism 221 and the lower clamping mechanism 222, thereby achieving stable clamping of the cap-shaped workpiece.

[0027] The first extrusion assembly 5 includes: a first extrusion ring 51, which is sleeved on the top of the inner rotating rod 211; the first extrusion assembly 5 also includes: a second extrusion ring, which is sleeved on the top of the outer rotating rod 212. Both the first and second extrusion rings have protruding limiting protrusions 511 on their inner side walls. Both the inner and outer rotating rods 211 and 212 have limiting grooves 512 for the limiting protrusions 511 to insert into. The limiting protrusions 511 and the limiting grooves 512 cooperate to cause the first and second extrusion rings to rotate, respectively, driven by the inner and outer rotating rods 211 and 212.

[0028] The surface of the first extrusion ring 51 that is in close contact with the end of the upper clamping mechanism 221 is the first extrusion surface 52, and the surface of the second extrusion ring that is in close contact with the end of the lower clamping mechanism 222 is the second extrusion surface. Both the first extrusion surface 52 and the second extrusion surface are sloped surfaces with a change in gradient in the radial direction of the support base 11. The first extrusion surface 52 and the second extrusion surface, through the change in gradient, extrude pressure on the upper clamping mechanism 221 and the lower clamping mechanism 222, causing the upper clamping mechanism 221 and the lower clamping mechanism 222 to move radially to clamp the cap-shaped workpiece.

[0029] The support base 11 has a support block 111 on its top, which is used to support the inner wall of the top of the cover-shaped workpiece.

[0030] A ball bearing 4 is provided between the outer rotating rod 212 and the support base 11, and the outer rotating rod 212 can rotate relative to the base 1 in the vertical direction through the ball bearing 4.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cap-shaped workpiece positioning and clamping device, characterized in that, include: The unit consists of a base (1), a clamping device (2), and a driving device (3). The base (1) includes: a support base (11) and a base (12). The support base (11) is located above the base (12). The support base (11) is connected above the base (12). Both the base (12) and the support base (11) have interconnected cavities. A clamping mechanism is provided in the cavity. The base (12) has a driving device (3) at both ends. The driving device (3) includes: a first driving mechanism (31) and a second driving mechanism (32), the first driving mechanism (31) and the second driving mechanism (32) being used to drive the clamping mechanism to clamp the cap-shaped workpiece; The clamping mechanism includes a rotating mechanism (21) and a clamping assembly (22). The rotating mechanism (21) is located in the cavity and can rotate relative to the base (12) along the vertical axis. The upper side of the rotating mechanism (21) is provided with a clamping assembly (22). There are at least two clamping assemblies (22). The clamping assembly (22) is mounted on the support (11). The clamping assembly (22) can move radially relative to the support (11). The rotating mechanism (21) is used to squeeze the clamping assembly (22) to contact the inner wall of the side of the cover-shaped workpiece. Of the two clamping assemblies (22), the upper clamping assembly (22) is the upper clamping mechanism (221), and the lower clamping assembly (22) is the lower clamping mechanism (222). The upper clamping mechanism (221) and the lower clamping mechanism (222) are separated by a distance in the vertical direction. The rotating mechanism (21) includes an inner rotating rod (211) and an outer rotating rod (212). The outer rotating rod (212) is sleeved on the inner rotating rod (211). The inner rotating rod (211) is used to drive the upper clamping mechanism to move radially relative to the support seat (11). The outer rotating rod (212) is used to drive the lower clamping mechanism to move radially relative to the support seat (11). A first driven gear (2121) is arranged around the bottom of the outer rotating rod (212), and a second driven gear (2111) is arranged around the bottom of the inner rotating rod (211). The first driven gear (2121) meshes with the output end of the first driving mechanism (31), and the second driven gear (2111) meshes with the output end of the second driving mechanism (32).

2. The cap-shaped workpiece positioning and clamping device according to claim 1, characterized in that, The first drive mechanism (31) and the second drive mechanism (32) both include: a rotating handle (311), a rotating rod (312) and a bevel gear (313). The bevel gear (313) is the output end of the first drive mechanism (31). The rotating handle (311) passes through the side of the base (12) and extends into the cavity. One end of the rotating handle is connected to the rotating rod, and the other end of the rotating rod is connected to the bevel gear (313). The bevel gear (313) meshes with the first driven gear (2121) or the second driven gear (2111).

3. The cap-shaped workpiece positioning and clamping device according to claim 2, characterized in that, The inner rotating rod (211) is surrounded by a first extrusion assembly (5), which is used to extrude the upper clamping mechanism (221). The outer rotating rod (212) is surrounded by a second extrusion assembly (6), which is used to extrude the lower clamping mechanism (222).

4. The cap-shaped workpiece positioning and clamping device according to claim 3, characterized in that, The first extrusion assembly (5) includes: a first extrusion ring (51), which is sleeved on the top of the inner rotating rod (211); The first extrusion assembly (5) includes: a second extrusion ring, which is sleeved on the top of the outer rotating rod (212). The inner side walls of the first extrusion ring (51) and the second extrusion ring both have a limited rotation protrusion (511). The inner rotating rod (211) and the outer rotating rod (212) both have a limited rotation groove (512) for the limited rotation protrusion (511) to be inserted.

5. The cap-shaped workpiece positioning and clamping device according to claim 4, characterized in that, The surface of the first extrusion ring (51) that is in close contact with the end of the upper clamping mechanism (221) is the first extrusion surface (52), and the surface of the second extrusion ring that is in close contact with the end of the lower clamping mechanism (222) is the second extrusion surface. Both the first extrusion surface (52) and the second extrusion surface are sloped surfaces with a gradient change in the radial direction of the support base (11).

6. The cap-shaped workpiece positioning and clamping device according to claim 5, characterized in that, The support base (11) has a support block (111) on top, which is used to support the inner wall of the top of the cover-shaped workpiece.

7. The cap-shaped workpiece positioning and clamping device according to claim 6, characterized in that, A ball bearing (4) is provided between the outer rotating rod (212) and the support base (11). The outer rotating rod (212) can rotate relative to the base (1) in the vertical direction through the ball bearing (4).

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