CN218312158U

CN218312158U - Small-size multistation anchor clamps of high accuracy

Info

Publication number: CN218312158U
Application number: CN202222872925.8U
Authority: CN
Inventors: 赵九洲
Original assignee: Tianjin Seagull Intelligent Technology Co ltd; Tianjin Seagull Watch Group Co Ltd
Current assignee: Tianjin Seagull Intelligent Technology Co ltd; Tianjin Seagull Watch Group Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-01-17
Anticipated expiration: 2032-10-25

Abstract

The utility model provides a small-size multistation anchor clamps of high accuracy, include: base, clamping component and drive assembly. The top of base is equipped with the loading board, is equipped with a plurality of centre gripping subassemblies on the loading board. The clamping assembly includes: installation sleeve, chuck and connecting screw, installation sleeve set up inside the mounting hole, and the setting of chuck liftable is equipped with the clamping part at the chuck top inside the installation sleeve, and connecting screw detachable sets up in the chuck bottom, is equipped with adjusting nut and adjusting spring on connecting screw. The drive assembly includes: a movable plate, a main driving shaft and a driving cam. The movable plate is arranged below the bearing plate in a lifting mode, the main driving shaft is rotatably arranged between the bearing plate and the movable plate, and the main driving shaft is provided with a driving cam. A small-size multistation anchor clamps of high accuracy, the work piece of the multiple different specifications of clamping once only to can be according to the centre gripping dynamics of actual demand individual adjustment every work piece.

Description

Small-size multistation anchor clamps of high accuracy

Technical Field

The utility model belongs to frock clamp equipment field especially relates to a small-size multistation anchor clamps of high accuracy.

Background

The machine tool fixture is a common auxiliary tool on a machine tool, and can facilitate a cutter to accurately position a workpiece when the machine tool fixture works, and simultaneously can clamp and fix the workpiece in a certain specific direction under the condition of not interfering the movement of the cutter, so that the machining precision and the machining efficiency of the workpiece are improved.

In the prior art, common machine tool clamp includes many forms such as flat tongs, clamp plate, chuck, but in carrying out the work piece course of working that the structure is small and exquisite and the required precision is higher, traditional anchor clamps will have the not enough problem of positioning accuracy, so will lead to processing rejection rate to rise to increase manufacturing cost. Secondly, the traditional clamp can only clamp one workpiece at a time, when the processing quantity of the workpieces is increased, the processing efficiency of the workpieces is seriously influenced by using the traditional clamp, and thus the processing period of the workpieces in batches is prolonged. In addition, traditional anchor clamps still can not adjust according to the centre gripping dynamics of actual demand work piece, and when there are multiple specification in the work piece of treating processing, the staff need frequently change anchor clamps, consequently can increase staff's intensity of labour.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a high precision small multi-station fixture to solve the above technical problems.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a high-precision small-sized multi-station clamp comprises: the clamping device comprises a base, a clamping assembly and a driving assembly, wherein a bearing plate is arranged at the top of the base, a plurality of mounting holes are formed in the bearing plate, and the clamping assembly is arranged in each mounting hole; the clamping assembly comprises: the mounting sleeve is arranged in the mounting hole, and the top of the inner side wall of the mounting sleeve is provided with a conical guide surface; the chuck is arranged in the mounting sleeve in a lifting manner, a circular truncated cone-shaped clamping part with an upward large end is arranged at the top of the chuck, a clamping hole for accommodating a workpiece is formed in the top surface of the circular truncated cone-shaped clamping part, a deformation notch is formed in the side wall of the circular truncated cone-shaped clamping part, and the deformation notch is communicated with the clamping hole; the connecting screw rod is detachably arranged at the bottom of the chuck, an adjusting nut and an adjusting spring are arranged on the connecting screw rod, and the adjusting spring is positioned above the adjusting nut; the drive assembly includes: a movable plate, a main drive shaft and a drive cam; the movable plate is arranged below the bearing plate in a lifting manner, a containing hole for containing the connecting screw rod is formed in the movable plate, and the bottom surface of the movable plate is connected with the top end of the adjusting spring; the main driving shaft is rotatably arranged between the bearing plate and the movable plate, the axis of the main driving shaft is parallel to the bearing plate, and one end of the main driving shaft is also provided with an operating handle vertical to the main driving shaft; the driving cam is detachably arranged on the main driving shaft, and the side wall of the driving cam is abutted to the top surface of the movable plate.

Furthermore, a limiting ring is arranged on the top surface of the mounting sleeve, and the outer diameter of the limiting ring is larger than the inner diameter of the mounting hole.

Furthermore, a pin hole is formed in the side wall of the mounting sleeve, and a guide pin is arranged in the pin hole; the side wall of the chuck is provided with a guide groove, the length direction of the guide groove is parallel to the lifting direction of the chuck, and a guide pin is inserted into the guide groove.

Furthermore, the connecting screw rod comprises a connecting section and a threaded section, the connecting section is arranged above the threaded section, a threaded hole is formed in the top surface of the connecting section, a threaded joint is arranged on the bottom surface of the chuck, and the threaded joint is arranged in the threaded hole.

Furthermore, the outer diameter of the threaded section is equal to the inner diameter of the accommodating hole, and the outer diameter of the connecting section is larger than the inner diameter of the accommodating hole.

Furthermore, the driving assembly further comprises an auxiliary driving shaft and a connecting sheet, the auxiliary driving shaft is rotatably arranged between the bearing plate and the movable plate, and the auxiliary driving shaft is parallel to the main driving shaft; an auxiliary cam is arranged on the auxiliary driving shaft, and the side wall of the auxiliary cam is propped against the top surface of the movable plate; a transmission piece is arranged at one end of the auxiliary driving shaft close to the operating handle, and the transmission piece is vertical to the auxiliary driving shaft; one end of the connecting piece is hinged with the transmission piece, and the other end of the connecting piece is hinged with the operating handle.

Furthermore, the main driving shaft is provided with an installation section, and the installation section is provided with an installation tangent plane; the driving cam is provided with a connecting hole for accommodating the mounting section, and the side wall of the driving cam is also provided with a screw hole which is communicated with the connecting hole; and a positioning screw is arranged in the screw hole, and the bottom end of the positioning screw is propped against the mounting tangent plane.

Compared with the prior art, a small-size multistation anchor clamps of high accuracy have following advantage:

a small-size multistation anchor clamps of high accuracy, be equipped with a plurality of mounting holes on the loading board, and all be equipped with the centre gripping subassembly in every mounting hole is inside. When a plurality of workpieces need to be processed, the clamping of a plurality of workpieces can be realized by the device at one time by workers, so that the processing efficiency of the workpieces in large batches can be improved. Secondly, can dismantle between chuck and the connecting screw in this device, the staff can be according to actual demand at the chuck of different stations installation equidimensions to improve the positioning accuracy of work piece, still can change the chuck according to the type of work piece simultaneously, thereby the multiple work piece of disposable clamping. In addition, this device can also adjust the clamping-force of every centre gripping subassembly alone through the cooperation of adjusting nut and regulating spring to satisfy the centre gripping demand of different work pieces.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a clamp according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a clamp according to an embodiment of the present invention;

fig. 3 is an exploded view of a clamping assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention.

Description of reference numerals:

1-a base; 11-a carrier plate; 2-installing a sleeve; 21-a conical guide surface; 22-a stop collar; 23-pin holes; 231-a guide pin; 3-clamping head; 31-a truncated cone-shaped clamping part; 311-a clamping hole; 312-a deformation cut; 32-a guide groove; 33-a threaded joint; 41-connecting section; 411-a threaded hole; 42-a threaded segment; 51-an adjusting nut; 52-adjusting the spring; 6-a movable plate; 7-a main drive shaft; 71-operating a handle; 72-a drive cam; 8-an auxiliary drive shaft; 81-auxiliary cam; 82-a drive strap; 83-connecting piece.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A high-precision small multi-station fixture, the structure of which can be schematically shown in fig. 1-4, wherein the high-precision small multi-station fixture in this embodiment comprises: base 1, clamping component and drive assembly. Wherein base 1 is arranged in bearing other parts among this device, and the centre gripping subassembly is used for treating the processing work piece and carries out the centre gripping location, and drive assembly is used for controlling the centre gripping subassembly to conveniently realize that the work piece switches between clamping state and non-clamping state.

In order to facilitate the installation of the clamping assembly, a bearing plate 11 is arranged at the top of the base 1, and a plurality of mounting holes are formed in the bearing plate 11. The staff can all set up a centre gripping subassembly in every mounting hole inside to make this device can be a plurality of work pieces of treating of centre gripping simultaneously, thereby improve the machining efficiency of big batch work piece.

Fig. 3 is an exploded view of a clamping assembly, which, as shown, may include: the mounting structure comprises a mounting sleeve 2, a chuck 3 and a connecting screw rod, wherein the mounting sleeve 2 is arranged in a mounting hole, and a conical guide surface 21 is arranged at the top of the inner side wall of the mounting sleeve 2. The chuck 3 is arranged in the mounting sleeve 2 in a liftable manner, and a circular truncated cone-shaped clamping part 31 with an upward large end is arranged at the top of the chuck 3. A clamping hole 311 for accommodating a workpiece is further formed in the top surface of the circular truncated cone-shaped clamping portion 31, a deformation notch 312 is formed in the side wall of the circular truncated cone-shaped clamping portion 31, and the deformation notch 312 is communicated with the clamping hole 311. When the workpiece to be processed needs to be clamped, the worker can place the workpiece into the clamping hole 311 and then drive the chuck 3 to perform a descending motion. At this time, the tapered guide surface 21 comes into contact with the tapered outer wall of the circular truncated cone-shaped clamping portion 31, and presses the circular truncated cone-shaped clamping portion 31. Since the deformation notch 312 is provided on the side wall of the circular truncated cone-shaped clamping portion 31, the inner diameter of the clamping hole 311 is reduced by the pressing force, and thus the workpiece to be processed can be clamped and fixed.

It should be noted that, in this embodiment, the clamping hole 311 may be a circular hole or a special-shaped hole, where the special-shaped hole includes but is not limited to a square hole, a triangular hole, a hexagonal hole, and other various forms. When the clamping device is used, a worker can select the shape of the clamping hole 311 according to the shape of a workpiece to be machined, so that the workpiece to be machined can be well fixed. Correspondingly, the shape of the top of the chuck 3 can be selectively adjusted according to actual needs, so that different working requirements can be met.

In order to prevent the mounting sleeve 2 from moving downwards during the clamping process of the workpiece, a limiting ring 22 may be disposed on the top surface of the mounting sleeve 2, and the outer diameter of the limiting ring 22 should be larger than the inner diameter of the mounting hole. When the chuck 3 is moved downwards, the bottom surface of the retainer ring 22 will abut against the top surface of the carrier plate 11, thereby preventing the mounting sleeve 2 from moving axially downwards.

In order to facilitate driving the chuck 3 to perform the lifting motion, the chuck 3 is driven to perform the corresponding motion by the cooperation of the driving assembly and the connecting screw rod. Specifically, the connecting screw rod is detachably arranged at the bottom of the chuck 3, an adjusting nut 51 and an adjusting spring 52 are arranged on the connecting screw rod, and the adjusting spring 52 is positioned above the adjusting nut 51. The drive assembly may include: a movable plate 6, a main driving shaft 7, and a driving cam 72. Wherein the movable plate 6 is arranged below the loading plate 11 in a liftable manner, a receiving hole for receiving a connecting screw is formed in the movable plate 6, and the bottom surface of the movable plate 6 is connected with the top end of the adjusting spring 52. The primary driving shaft 7 is rotatably disposed between the carrying plate 11 and the movable plate 6, and the axis of the primary driving shaft 7 should be parallel to the carrying plate 11. An operating handle 71 perpendicular to the main driving shaft 7 is further provided at one end of the main driving shaft 7, a driving cam 72 is detachably provided on the main driving shaft 7, and a side wall of the driving cam 72 should abut against the top surface of the movable plate 6.

Alternatively, to achieve the assembly between the drive cam 72 and the main drive shaft 7, a mounting section may be provided on the main drive shaft 7, and a mounting section should be provided on the mounting section. Accordingly, a coupling hole should be formed in the driving cam 72 so that a worker can insert the mounting section into the coupling hole when assembling. In addition, a screw hole communicating with the connection hole is provided on the side wall of the driving cam 72, and a set screw is provided inside the screw hole. After the mounting section is inserted into the connecting hole, the worker may screw the set screw inward so that the bottom end of the set screw abuts against the mounting cut surface, thereby mounting the driving cam 72 to the main driving shaft 7.

When the clamping assembly is required to clamp a workpiece, a worker may input a rotational torque to the main drive shaft 7 by operating the handle 71 to start the rotation of the main drive shaft 7 fitted with the drive cam 72. Since the side wall of the driving cam 72 abuts against the top surface of the movable plate 6 and the bottom surface of the movable plate 6 is connected to the adjusting spring 52, the movable plate 6 will follow the contour of the driving cam 72 to reciprocate up and down. When the movable plate 6 moves downwards, the movable plate 6 and the adjusting nut 51 will press the adjusting spring 52, and during this process, the elastic force inside the adjusting spring 52 will drive the connecting screw to generate a downward acting force, so as to drive the chuck 3 to move downwards, thereby clamping and fixing the workpiece.

Alternatively, to achieve a detachable connection of the cartridge 3 to the connecting screw, the connecting screw may comprise a connecting section 41 and a threaded section 42. Wherein the connection section 41 is provided above the threaded section 42, and a threaded hole 411 is provided on a top surface of the connection section 41. Accordingly, a screw joint 33 should be provided on the bottom surface of the chuck 3, and when the installation is performed, the worker can insert the screw joint 33 into the threaded hole 411 and lock the screw joint by the screw thread, thereby completing the detachable connection of the chuck 3 and the connecting screw rod. In the process of actual use, workers can install the chucks 3 with different specifications and different shapes on the top of the connecting screw according to the types and specifications of workpieces to be processed, so that different processing requirements are met.

In order to facilitate the worker to take out the workpiece from the clamping hole 311, the outer diameter of the threaded section 42 in this embodiment should be equal to the inner diameter of the receiving hole, and the outer diameter of the connecting section 41 should be larger than the inner diameter of the receiving hole. When the pressing force of the driving cam 72 on the movable plate 6 is reduced, the restoring process of the adjusting spring 52 drives the movable plate 6 to perform the ascending motion. Because the outer diameter of the connecting section 41 is greater than the inner diameter of the receiving hole, the top surface of the movable plate 6 will lift the bottom end surface of the connecting section 41, so as to drive the chuck 3 to move upward, and further facilitate the worker to take out the workpiece clamped in the clamping hole 311.

Optionally, in order to prevent the chuck 3 from rotating during the lifting process, a pin hole 23 may be further formed in the sidewall of the mounting sleeve 2, and a guide pin 231 is disposed inside the pin hole 23. Accordingly, the side wall of the chuck 3 should be provided with a guide groove 32, and the length direction of the guide groove 32 is parallel to the lifting direction of the chuck 3. When the chuck 3 is mounted, the guide pin 231 should be inserted into the guide groove 32, and when the chuck 3 performs a lifting motion, the chuck 3 can be circumferentially limited by the cooperation of the guide pin 231 and the guide groove 32, so that abnormal rotation of the chuck 3 is avoided.

In the actual use process, different workpieces to be processed may need different clamping forces, and in order to solve the problem, a worker may adjust the mounting height of the adjusting nut 51 according to the requirements of the workpieces for the clamping forces, so that the adjusting spring 52 has different deformation amounts when the movable plate 6 descends to the lowest position, and further the clamping force inside the clamping assembly matches with the requirements of the workpieces.

As an alternative to this embodiment, the driving assembly may further include a secondary driving shaft 8 and a connecting piece 83 in order to facilitate uniform pressure of the movable plate 6 during the descent. Specifically, the auxiliary driving shaft 8 is rotatably disposed between the loading plate 11 and the movable plate 6, and the auxiliary driving shaft 8 is parallel to the main driving shaft 7. The auxiliary cam 81 is provided on the auxiliary driving shaft 8, and the side wall of the auxiliary cam 81 abuts against the top surface of the movable plate 6, so that the auxiliary cam 81 and the auxiliary driving shaft 8 are assembled in the same manner as the driving cam 72 and the main driving shaft 7, and the profile curve of the auxiliary cam 81 is the same as the driving cam 72. In order to facilitate the synchronous rotation of the auxiliary driving shaft 8 and the main driving shaft 7, a driving strap 82 should be disposed at one end of the auxiliary driving shaft 8 close to the operating handle 71, the driving strap 82 is perpendicular to the auxiliary driving shaft 8, one end of the connecting strap 83 should be hinged to the driving strap 82, and the other end should be hinged to the operating handle 71. When the operator inputs a rotational torque to the main drive shaft 7 through the operation handle 71, the connecting piece 83 enables the driving piece 82 to move in synchronization with the operation handle 71, thereby enabling the auxiliary drive shaft 8 to move in the same manner as the main drive shaft 7.

The following explains the effects of the above-described scheme:

the embodiment provides a small-size multistation anchor clamps of high accuracy, can pass through a plurality of centre gripping subassemblies that set up on the loading board and a plurality of work pieces of clamping simultaneously to improve the machining efficiency of big batch work piece. Secondly, this device can dismantle the change according to the actual demand to the chuck, can not only conveniently improve the positioning accuracy of work piece, can also the multiple work piece of clamping simultaneously. In addition, this device can be according to actual demand adjustment adjusting nut's position to make every centre gripping subassembly have different clamping-force, and then satisfy the centre gripping demand of different work pieces.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a small-size multistation anchor clamps of high accuracy which characterized in that includes: the clamping device comprises a base (1), a clamping assembly and a driving assembly, wherein a bearing plate (11) is arranged at the top of the base (1), a plurality of mounting holes are formed in the bearing plate (11), and one clamping assembly is arranged in each mounting hole; the clamping assembly comprises: the mounting structure comprises a mounting sleeve (2), a chuck (3) and a connecting screw rod, wherein the mounting sleeve (2) is arranged in a mounting hole, and a conical guide surface (21) is arranged at the top of the inner side wall of the mounting sleeve (2); the chuck (3) is arranged in the mounting sleeve (2) in a lifting manner, a circular truncated cone-shaped clamping part (31) with a large end upwards is arranged at the top of the chuck (3), a clamping hole (311) for accommodating a workpiece is formed in the top surface of the circular truncated cone-shaped clamping part (31), a deformation notch (312) is formed in the side wall of the circular truncated cone-shaped clamping part (31), and the deformation notch (312) is communicated with the clamping hole (311); the connecting screw rod is detachably arranged at the bottom of the chuck (3), an adjusting nut (51) and an adjusting spring (52) are arranged on the connecting screw rod, and the adjusting spring (52) is positioned above the adjusting nut (51); the drive assembly includes: a movable plate (6), a main drive shaft (7), and a drive cam (72); the movable plate (6) is arranged below the bearing plate (11) in a lifting manner, a containing hole for containing a connecting screw rod is formed in the movable plate (6), and the bottom surface of the movable plate (6) is connected with the top end of the adjusting spring (52); the main driving shaft (7) is rotatably arranged between the bearing plate (11) and the movable plate (6), the axis of the main driving shaft (7) is parallel to the bearing plate (11), and one end of the main driving shaft (7) is also provided with an operating handle (71) which is vertical to the main driving shaft (7); the driving cam (72) is detachably arranged on the main driving shaft (7), and the side wall of the driving cam (72) is propped against the top surface of the movable plate (6).

2. A high precision small size multi-station clamp according to claim 1, characterized in that: the top surface of the mounting sleeve (2) is provided with a limiting ring (22), and the outer diameter of the limiting ring (22) is larger than the inner diameter of the mounting hole.

3. A high precision small multi-station clamp according to claim 1, characterized in that: the side wall of the mounting sleeve (2) is provided with a pin hole (23), and a guide pin (231) is arranged in the pin hole (23); the side wall of the chuck (3) is provided with a guide groove (32), the length direction of the guide groove (32) is parallel to the lifting direction of the chuck (3), and a guide pin (231) is inserted into the guide groove (32).

4. A high precision small multi-station clamp according to claim 1, characterized in that: the connecting screw rod comprises a connecting section (41) and a threaded section (42), the connecting section (41) is arranged above the threaded section (42), a threaded hole (411) is formed in the top surface of the connecting section (41), a threaded joint (33) is arranged on the bottom surface of the chuck (3), and the threaded joint (33) is arranged in the threaded hole (411).

5. A high precision small multi-station clamp according to claim 4, characterized in that: the threaded section (42) has an outer diameter equal to an inner diameter of the receiving bore, and the connecting section (41) has an outer diameter greater than the inner diameter of the receiving bore.

6. A high precision small multi-station clamp according to claim 1, characterized in that: the driving assembly further comprises an auxiliary driving shaft (8) and a connecting piece (83), the auxiliary driving shaft (8) is rotatably arranged between the bearing plate (11) and the movable plate (6), and the auxiliary driving shaft (8) is parallel to the main driving shaft (7); an auxiliary cam (81) is arranged on the auxiliary driving shaft (8), and the side wall of the auxiliary cam (81) is propped against the top surface of the movable plate (6); a transmission piece (82) is arranged at one end of the auxiliary driving shaft (8) close to the operating handle (71), and the transmission piece (82) is vertical to the auxiliary driving shaft (8); one end of the connecting piece (83) is hinged with the transmission piece (82), and the other end of the connecting piece is hinged with the operating handle (71).

7. A high precision small multi-station clamp according to claim 1, characterized in that: the main driving shaft (7) is provided with an installation section, and the installation section is provided with an installation tangent plane; the driving cam (72) is provided with a connecting hole for accommodating the mounting section, and the side wall of the driving cam (72) is also provided with a screw hole which is communicated with the connecting hole; and a positioning screw is arranged in the screw hole, and the bottom end of the positioning screw is propped against the mounting tangent plane.