Tool clamp for precise ball nut manufacturing

Abstract

The utility model relates to the field of work fixtures, in particular to a work fixture for manufacturing a precise ball nut. The tool clamp comprises a base; the clamping structure at least comprises a first fixed support, a second fixed support, a first movable support and a second movable support; a locking structure, comprising a supporting plate fixedly connected with a base, a first threaded column in sliding connection with the supporting plate and a first fixed support, a first connecting piece connected with the first threaded column and a first movable support, a second threaded column connected with the first movable support and a second connecting piece connected with the second threaded column and a second movable support. And the threaded cylinder is arranged on the circumferential outer side of the first threaded column in a sleeving mode and abuts against the supporting plate. According to the tool clamp for precise ball nut manufacturing, the first movable support and the second movable support can be driven by the threaded cylinder to move, so that the two ball nuts are clamped, and the clamping efficiency of the ball nuts is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool fixture field, concretely relates to a tool fixture for precision ball nut manufacturing. BACKGROUND

[0002] Ball screw pair is the most common transmission device in transmission machinery with high precision, and the ball screw pair comprises a screw rod, a ball nut and a ball, the ball nut needs to be processed after being manufactured, a plurality of mounting holes are processed on the ball nut, and the ball nut needs to be fixed for processing during the hole processing.

[0003] The existing ball nut needs to be punched during processing. However, each ball nut needs to be clamped and fixed by a three-jaw chuck, the clamping efficiency is low, and the processing efficiency of the ball nut is low.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] In order to improve or solve the technical problems of the three-jaw chuck in the prior art that can only clamp one ball nut at a time and has low clamping efficiency, the utility model provides a tool fixture for precision ball nut manufacturing. The tool fixture for precision ball nut manufacturing comprises a base, a clamping structure installed on the base and comprising at least a first fixed support and a second fixed support fixed on the base, and a first movable support and a second movable support movably installed on the base, the first movable support and the second movable support are configured to be close to the first fixed support and the second fixed support respectively to clamp the ball nut, a locking structure comprising a support plate fixedly connected with the base, a first threaded column in sliding connection with the support plate and the first fixed support, a first connecting piece connecting the first threaded column and the first movable support, a second threaded column connected with the first movable support, a second connecting piece connecting the second threaded column and the second movable support, and a threaded cylinder sleeved on the circumferential outer side of the first threaded column and abutting against the support plate.

[0006] The utility model relates to a tool fixture for precision ball nut manufacturing, which comprises a base, a clamping structure and a locking structure. The base is used for mounting the clamping structure. The clamping structure comprises at least a first fixed support, a second fixed support, a first movable support and a second movable support. The first fixed support and the first movable support cooperate to clamp one ball nut. The second fixed support and the second movable support cooperate to clamp another ball nut. The locking structure comprises a support plate, a first threaded column, a first connecting piece, a second threaded column, a second connecting piece and a threaded cylinder. The threaded cylinder is sleeved on the circumferential outer side of the first threaded column and abuts against the support plate. During rotation, the first threaded column is driven to move, thereby driving the first movable support to move close to the first fixed support through the first connecting piece. The second threaded column is connected with the first movable support, and the second connecting piece connects the second threaded column with the second movable support. When the first movable support moves, the second movable support is driven to move close to the second fixed support. Through the above arrangement, the tool fixture for precision ball nut manufacturing can drive the first movable support and the second movable support to move through the threaded cylinder, thereby clamping two ball nuts and improving the clamping efficiency of the ball nut.

[0007] Further, sliding grooves matched with the first connecting piece and the second connecting piece are formed on the first fixed support and the second fixed support. The first connecting piece comprises a connecting part connected with the first threaded column and an extension part connecting the first movable support with the connecting part. The extension part is fixedly connected with the first movable support.

[0008] Further, the first threaded column and the connecting part are detachably connected through a connecting bolt.

[0009] Further, a threaded hole matched with the second threaded column is formed on the first movable support. The first movable support is threadedly connected with the second threaded column.

[0010] Further, a limiting hole is formed on the first threaded column, a positioning hole is formed on the support plate, and a positioning pin matched with the limiting hole is arranged in the positioning hole.

[0011] Further, the second movable support is connected with a reset structure. The reset structure comprises a reset column connected with the second movable support, a mounting cylinder mounted on the base and a reset spring sleeved on the circumferential outer side of the reset column.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The locking structure comprises a support plate, a first threaded column, a first connecting piece, a second threaded column, a second connecting piece and a threaded cylinder; the threaded cylinder is sleeved on the outer side of the first threaded column and abuts against the support plate, can drive the first threaded column to move in the process of rotation, and in turn drive the first movable support to approach the first fixed support through the first connecting piece; the second threaded column is connected with the first movable support, and the second connecting piece connects the second threaded column with the second movable support, can drive the second movable support to approach the second fixed support when the first movable support moves; the first movable support and the second movable support are driven to move by the threaded cylinder, so that the two ball nuts are clamped, and the clamping efficiency of the ball nuts is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0015] Figure 1 is the schematic diagram of an embodiment of the utility model for a tool fixture for precision ball nut manufacturing;

[0016] Figure 2 is another cross-sectional schematic diagram of an embodiment of the utility model for a tool fixture for precision ball nut manufacturing.

[0017] List of reference signs: 1, base; 11, avoiding groove; 2, clamping structure; 21, first fixed support; 22, first movable support; 23, second fixed support; 24, second movable support; 25, sliding groove; 3, locking structure; 31, support plate; 32, first threaded column; 33, first connecting piece; 331, connecting part; 332, extension part; 34, second threaded column; 35, second connecting piece; 36, threaded cylinder; 37, positioning pin; 4, reset structure; 41, reset column; 42, mounting cylinder; 43, reset spring. DETAILED DESCRIPTION

[0018] The preferred embodiments of the utility model will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0019] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and are not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0020] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the terms "mount", "set", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can be indirectly connected through the intermediate medium, also can be two element internal communication. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0021] In order to improve or solve the technical problem that the three-jaw chuck can only clamp one ball nut at a time in the prior art, the utility model provides a tool fixture for precision ball nut manufacturing. The tool fixture for precision ball nut manufacturing comprises a base 1, a clamping structure 2 installed on the base 1 and comprising at least a first fixed support 21 and a second fixed support 23 fixed on the base 1, and a first movable support 22 and a second movable support 24 movably installed on the base 1, the first movable support 22 and the second movable support 24 are configured to be close to the first fixed support 21 and the second fixed support 23 respectively to clamp the ball nut, a locking structure 3 comprising a support plate 31 fixedly connected with the base 1, a first threaded column 32 in sliding connection with the support plate 31 and the first fixed support 21, a first connecting piece 33 connecting the first threaded column 32 and the first movable support 22, a second threaded column 34 connected with the first movable support 22, a second connecting piece 35 connecting the second threaded column 34 and the second movable support 24, and a threaded cylinder 36 sleeved on the circumferential outer side of the first threaded column 32 and abutting against the support plate 31.

[0022] Figure 1 is an embodiment of the tool fixture for precision ball nut manufacturing of the utility model, Figure 2 is another cross-sectional view of an embodiment of the tool fixture for precision ball nut manufacturing of the utility model. As Figure 1 and Figure 2 shown, in one or more embodiments, the tool fixture for precision ball nut manufacturing of the utility model comprises a base 1, a clamping structure 2, a locking structure 3 and a reset structure 4.

[0023] Continuing to refer to Figure 1 and Figure 2, the base 1 is substantially long strip shape, a plurality of avoiding grooves 11 are arranged on the base 1 at intervals, the avoiding grooves 11 are used for avoiding the ball nut. In one or more embodiments, the clamping structure 2 includes a first fixed support 21, a second fixed support 23, a first movable support 22 and a second movable support 24. The first fixed support 21 and the second fixed support 23 are both fixed on the base 1, and the first movable support 22 and the second movable support 24 are both movably placed on the base 1. Specifically, the first fixed support 21, the first movable support 22, the second fixed support 23 and the second movable support 24 are arranged in sequence along the length direction of the base 1. The first fixed support 21 and the first movable support 22 are arranged on opposite sides of the avoiding groove 11, and the second fixed support 23 and the second movable support 24 are arranged on opposite sides of the avoiding groove 11. Alternatively, a third fixed support and a third movable support can also be provided, which have the same arrangement structure as the second fixed support 23 and the second movable support 24. Further, recesses matched with the flange plate of the ball nut and arc-shaped grooves matched with the barrel of the ball nut are formed on the first fixed support 21 and the first movable support 22. Further, a through hole and a sliding groove 25 connected with the through hole are formed on the first fixed support 21, and a threaded hole is formed on the first movable support 22. A through hole and a sliding groove 25 connected with the through hole are also formed on the second fixed support 23 for installing the locking structure 3.

[0024] Continuing to refer to Figure 1 and Figure 2 , in one or more embodiments, the locking structure 3 includes a support plate 31 fixedly connected with the base 1, a first threaded column 32 slidably connected with the support plate 31, a first connecting piece 33 connecting the first threaded column 32 with the first movable support 22, a second threaded column 34 connected with the first movable support 22, a second connecting piece 35 connecting the second threaded column 34 with the second movable support 24, and a threaded cylinder 36 sleeved on the outer side of the first threaded column 32. Among them, the support plate 31 is arranged on the side of the first fixed support 21 away from the first movable support 22. A through hole matched with the first threaded column 32 is formed on the support plate 31. During installation, the first connecting piece 33 is first connected with the first threaded column 32, and then the first threaded column 32 is extended out through the first fixed support 21 and the support plate 31 and connected with the threaded cylinder 36. Further, a hand wheel is arranged on the outer side of the threaded cylinder 36, which is convenient for rotating the threaded cylinder 36. Further, a positioning hole is formed on the support plate 31, and a positioning pin 37 is arranged in the positioning hole. A limiting hole is formed on the first threaded column 32, and after the first threaded column 32 is moved into position, i.e. after the first fixed support 21 and the first movable support 22 clamp the ball nut, the positioning pin 37 is inserted into the limiting hole, thereby preventing the first threaded column 32 from moving back.

[0025] Continuing to refer to Figure 1 andFigure 2 In one or more embodiments, the first connecting piece 33 is substantially U-shaped and slidably arranged in the sliding groove 25 of the first fixed support 21. The first connecting piece 33 comprises a connecting portion 331 connected with the first threaded column 32 and an extending portion 332 connected with the first moving support 22. The connecting portion 331 is detachably connected with the threaded cylinder 36 through a connecting bolt. The two extending portions 332 are arranged on both sides of the arc-shaped groove to avoid interfering with the ball nut. Specifically, the extending portion 332 can be fixedly connected with the first moving support 22 through a bolt, or can be fixedly connected with the first moving support 22 through a plug-in structure or a clamping structure. Further, one end of the second threaded column 34 is matched with the threaded hole on the first moving support 22 and is fixedly connected with the first moving support 22; the other end of the second threaded column 34 is fixedly connected with the second connecting piece 35. The connecting structure of the second threaded column 34 and the second connecting piece 35 is the same as that of the first threaded column 32 and the first connecting piece 33, which will not be described here. During installation, the second threaded column 34 is first connected with the first moving support 22, then the second connecting piece 35 is connected with the second threaded column 34, and finally the second connecting piece 35 is connected with the second moving support 24. Further, the reset structure 4 comprises a reset column 41 connected with the second moving support 24, a mounting cylinder 42 mounted on the base 1, and a reset spring 43 sleeved on the circumferential outer side of the reset column 41. One end of the reset column 41 is fixedly connected with the second moving support 24 through a threaded structure, and the other end is arranged in the mounting cylinder 42 and is provided with a limiting ring matched with the mounting cylinder 42. The reset column 41 is slidably connected with the mounting cylinder 42, and the limiting ring is slidably arranged in the mounting cylinder 42. The reset spring 43 is sleeved on the circumferential outer side of the reset column 41, one end of the reset spring 43 abuts against the mounting cylinder 42, and the other end abuts against the limiting ring. After the ball nut is processed, the positioning pin 37 is removed, the reset spring 43 assists the threaded cylinder 36 to drive the second moving support 24 and the first moving support 22 to move away from the support plate 31, thereby facilitating the removal of the ball nut.

[0026] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the present application, and the technical cases after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A jig for precision ball nut manufacturing, characterized by, The utility model relates to a ball nut clamping device, including: a base (1); a clamping structure (2) mounted on the base (1) and comprising at least a first fixed support (21) and a second fixed support (23) fixed on the base (1), and a first movable support (22) and a second movable support (24) movably mounted on the base (1); the first movable support (22) and the second movable support (24) are configured to be close to the first fixed support (21) and the second fixed support (23) respectively to clamp a ball nut; a locking structure (3) comprising a support plate (31) fixedly connected with the base (1), a first threaded column (32) in sliding connection with the support plate (31) and the first fixed support (21), a first connecting piece (33) connecting the first threaded column (32) and the first movable support (22), a second threaded column (34) connected with the first movable support (22), a second connecting piece (35) connecting the second threaded column (34) and the second movable support (24), and a threaded cylinder (36) sleeved on the circumferential outer side of the first threaded column (32) and abutting against the support plate (31).

2. The fixture clamp for precision ball nut manufacturing according to claim 1, wherein, Sliding grooves (25) matched with the first connecting piece (33) and the second connecting piece (35) are formed on the first fixed support (21) and the second fixed support (23); the first connecting piece (33) comprises a connecting part (331) connected with the first threaded column (32), and an extension part (332) connecting the first movable support (22) and the connecting part (331), and the extension part (332) is fixedly connected with the first movable support (22).

3. The fixture clamp for precision ball nut manufacturing according to claim 2, wherein, The first threaded column (32) and the connecting part (331) are detachably connected through a connecting bolt.

4. The fixture clamp for precision ball nut manufacturing of claim 1, wherein, A threaded hole matched with the second threaded column (34) is formed on the first movable support (22), and the first movable support (22) is in threaded fit connection with the second threaded column (34).

5. The fixture clamp for precision ball nut manufacturing of claim 1, wherein, A limiting hole is formed on the first threaded column (32), a positioning hole is formed on the support plate (31), and a positioning pin (37) matched with the limiting hole is arranged in the positioning hole.

6. The fixture clamp for precision ball nut manufacturing of claim 1, wherein, The second movable support (24) is connected with a reset structure (4), and the reset structure (4) comprises a reset column (41) connected with the second movable support (24), a mounting cylinder (42) mounted on the base (1), and a reset spring (43) sleeved on the circumferential outer side of the reset column (41).

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