Jig for machining eccentric shaft

Abstract

The present application discloses a fixture for machining eccentric shafts, and relates to the technical field of machine tool fixtures. The fixture for machining eccentric shafts of the present application includes a machine tool connecting plate, an eccentric sleeve and a connecting sleeve. The machine tool connecting plate has a first inner cavity; the eccentric sleeve has a second inner cavity, and the axis of the second inner cavity is not on the same straight line as the axis of the machine tool connecting plate, and the eccentric sleeve is connected to the machine tool connecting plate; the connecting sleeve is arranged in the first inner cavity and the eccentric sleeve; and a clamping device is arranged in the second inner cavity, and the axis of the clamping device coincides with the axis of the second inner cavity. The clamping device is used to clamp the optical axis to be machined, and one end of the optical axis to be machined is provided with external teeth. The present application can detachably replace the clamping device according to the processing requirements of workpieces of different sizes; and one end of the optical axis to be machined as an eccentric shaft is provided with external teeth. Therefore, the present application can achieve multi-angle precise angular positioning, good versatility and reliable clamping.

Description

Technical Field

[0001] The present application relates to the technical field of machine tool fixtures, and in particular to a fixture for machining eccentric shafts. Background Art

[0002] The workpiece whose outer circle is parallel to the axis of the outer circle but not coincident is called an eccentric shaft. The eccentric shaft is generally fixed on the rotating shaft of the motor through an eccentric hole, and performs cam motion when the motor starts. Therefore, it is widely used in automobiles, engines, pumps, etc.

[0003] Therefore, there is a great demand for a clamp that can clamp an eccentric shaft and achieve precise angular positioning in the market. However, the eccentric shaft clamps used in the prior art have the following disadvantages: they cannot achieve precise angular positioning at multiple angles; they have poor versatility; and they cannot clamp and fix the workpiece to be processed into an eccentric shaft. Summary of the invention

[0004] The purpose of the present application is to provide a clamp for machining an eccentric shaft, which can clamp optical shafts of different sizes and is used to machine the optical shaft into an eccentric shaft.

[0005] The embodiment of the present application is implemented as follows:

[0006] A clamp for machining an eccentric shaft comprises a machine tool connection plate, an eccentric sleeve and a connecting sleeve, wherein the machine tool connection plate has a first inner cavity; the eccentric sleeve has a second inner cavity, the axis of the second inner cavity is not on the same straight line as the axis of the machine tool connection plate, and the eccentric sleeve is connected to the machine tool connection plate; the connecting sleeve is arranged in the first inner cavity and the eccentric sleeve; and the clamping device is arranged in the second inner cavity, and the axis of the clamping device coincides with the axis of the second inner cavity. The clamping device is used to clamp the optical axis to be machined.

[0007] In one embodiment, it further includes a positioning bracket and a positioning top block, wherein the positioning bracket is connected to the machine tool connecting plate; the positioning bracket has a first hole, and the positioning top block is arranged in the first hole.

[0008] In one embodiment, a first groove is provided on the machine tool connecting plate, and the positioning bracket is connected to the first groove.

[0009] In one embodiment, the socket is provided with two through holes, and the positioning bracket is inserted into the two through holes.

[0010] In one embodiment, the positioning top block is provided with a first threaded hole; the positioning bracket is provided with a second threaded hole, a screw is provided in the second threaded hole, and the positioning bracket is fixedly connected to the positioning top block through the cooperation of the screw and the first threaded hole.

[0011] In one embodiment, a first boss is provided on the inner wall of the socket;

[0012] A second groove is provided on the outer wall of the clamping device, and the socket is connected to the clamping device through the cooperation between the first boss and the second groove.

[0013] In one embodiment, a cylindrical sleeve is provided on the connecting sleeve, the axis of the cylindrical sleeve coincides with the axis of the connecting sleeve, and a thread is provided inside the cylindrical sleeve.

[0014] In one embodiment, a second hole is provided on the outer wall of the eccentric sleeve, a third hole is provided on the outer wall of the clamping device, and locking screws are provided in the second hole and the third hole for positioning.

[0015] In one embodiment, an end of the optical axis to be processed is provided with external teeth.

[0016] In one embodiment, positioning balls are provided in the second hole and the third hole, the positioning balls are inserted into the external teeth, and the machined eccentric shaft is circumferentially positioned by the locking screws and the positioning balls.

[0017] In one embodiment, a spring is disposed in the second hole and the third hole, and the spring is disposed between the locking screw and the positioning ball.

[0018] The beneficial effects of this application compared with the prior art are:

[0019] The clamp for machining an eccentric shaft of the present application is composed of a positioning top block for positioning, a machine tool connection plate for connection, and a clamping device for clamping, and can clamp optical shafts of different sizes for machining the optical shaft into an eccentric shaft. Therefore, the clamp for machining an eccentric shaft of the present application has the advantages of being able to achieve multi-angle precise angular positioning, good versatility, and reliable clamping.

[0020] The clamping device of the present application is detachable and easy to replace.

[0021] One end of the optical axis of the present application is provided with external teeth, and the clamp for processing the eccentric shaft of the present application is provided with locking screws, springs and positioning balls, and the positioning balls can be inserted into the external teeth of the optical axis to be processed, so as to perform circumferential positioning of the optical axis to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An exploded view of a fixture for machining an eccentric shaft according to an embodiment of the present application.

[0024] Figure 2 A cross-sectional view of a fixture for machining an eccentric shaft according to an embodiment of the present application.

[0025] Figure 3 An embodiment of the present application is shown Figure 2 Cross-sectional view along the A-A direction.

[0026] Figure 4 This is a schematic structural diagram of a fixture for machining an eccentric shaft according to an embodiment of the present application.

[0027] Icons: 1-clamp for machining eccentric shaft; 2-machine tool connecting plate; 21-first inner cavity; 22-first groove; 221-third threaded hole; 3-connecting sleeve; 31-through hole; 32-cylindrical sleeve; 321-thread; 33-first boss; 4-positioning bracket; 41-first hole; 42-second threaded hole; 5-positioning top block; 51-first threaded hole; 6-eccentric sleeve; 61-second inner cavity; 62-second hole; 621-threaded section; 63-flange; 7-clamping device; 71-third hole; 72-locking screw; 73-spring; 74-positioning ball; 75-second groove; 8-optical axis; 81-external tooth. DETAILED DESCRIPTION

[0028] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0032] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0033] Please refer to Figure 1 , which is an exploded view of a fixture for machining an eccentric shaft according to an embodiment of the present application. An external tooth 81 is provided on one end of the optical shaft 8 to be machined.

[0034] A clamp 1 for machining an eccentric shaft comprises a machine tool connection plate 2, a connection sleeve 3, an eccentric sleeve 6 and a clamping device 7. The machine tool connection plate 2 has a first inner cavity 21; the eccentric sleeve 6 has a second inner cavity 61, and the eccentric sleeve 6 is connected to the machine tool connection plate 2; the connection sleeve 3 is arranged in the first inner cavity 21 of the machine tool connection plate 2 and in the second inner cavity 61 of the eccentric sleeve 6; the clamping device 7 is arranged in the second inner cavity 61, and the clamping device 7 is used to clamp the optical axis 8 to be machined.

[0035] The clamping device 7 is of a hydraulic type, an expansion type, a tension type or other structure. In this embodiment, the structure of the clamping device 7 is a triangular chuck type.

[0036] In one operation, the operator connects the machine tool connection plate 2 to the ordinary machine tool, connects the socket 3 to the machine tool pull rod through the thread, starts the machine tool, pulls the pull rod, and the pull rod drives the socket 3 to move toward the machine tool, thereby driving the clamping device 7 to move, so that the clamping device 7 clamps the optical axis 8 to be processed. Ordinary machine tools can process the optical axis 8 into an eccentric axis.

[0037] Therefore, the clamp 1 for machining an eccentric shaft of the present application has the advantages of being able to achieve precise angular positioning at multiple angles, having good versatility and reliable clamping.

[0038] A fixture 1 for machining an eccentric shaft also includes a positioning bracket 4 and a positioning top block 5. The positioning bracket 4 has a first hole 41. The positioning bracket 4 is arranged in a first inner cavity 21 of a machine tool connecting plate 2. The positioning top block 5 is arranged in the first hole 41.

[0039] The positioning top block 5 is provided with a first threaded hole 51 ; the positioning bracket 4 is provided with a second threaded hole 42 , in which a screw is provided; the positioning bracket 4 is fixedly connected to the positioning top block 5 through the cooperation of the screw and the first threaded hole 51 .

[0040] During an operation, the operator inserts the end of the optical axis 8 to be processed with the external teeth 81 into the clamping device 7. Restricted by the positioning top block 5, the optical axis 8 to be processed is inserted into a predetermined position.

[0041] Please refer to Figure 2 , which is a schematic diagram of the structure of a fixture 1 for machining an eccentric shaft according to an embodiment of the present application. Figure 3 , which is shown in an embodiment of the present application Figure 2 The eccentric sleeve 6 has a second inner cavity 61, the axis of the second inner cavity 61 is not in the same straight line with the axis of the machine tool connection plate 2, the clamping device 7 is arranged in the second inner cavity 61, and the axis of the clamping device 7 coincides with the axis of the second inner cavity 61. Since the eccentric sleeve 6 has the second inner cavity 61, the axis of the second inner cavity 61 is not in the same straight line with the axis of the machine tool connection plate 2, so it can be used to process the eccentric shaft.

[0042] When it is necessary to process eccentric shafts of different sizes, the appropriate eccentric sleeve 6 and clamping device 7 can be selected according to the eccentric size and the diameter of the optical shaft 8 to be processed. However, since the size of the ordinary lathe for the clamp 1 for processing the eccentric shaft applicable to the present application remains unchanged, the specification of the machine tool connection plate 2 is between 80mm and 400mm in diameter, so the size specification of the eccentric sleeve 6 should also be between 80mm and 400mm in diameter. By selecting the appropriate size of the eccentric sleeve 6, the eccentric size of 0.01mm to 50mm can be achieved. Finally, the appropriate clamping device 7 is selected according to the size of the eccentric shaft.

[0043] The socket 3 of the clamp 1 for machining an eccentric shaft of the present application is provided with two through holes 31, and the positioning bracket 4 is inserted into the two through holes 31. In one embodiment, the positioning bracket 4 can be made of rubber or other materials.

[0044] One end of the machine tool connection plate 2 is provided with a first groove 22, and the positioning bracket 4 is connected to the first groove 22 by a snap connection or the like, thereby being connected to the machine tool connection plate 2. In this embodiment, the positioning bracket 4 is connected to the machine tool connection plate 2 by screw connection.

[0045] A second hole 62 is provided on the outer wall of the eccentric sleeve 6, a threaded section 621 is provided in the second hole 62, a third hole 71 is provided on the outer wall of the clamping device 7, the axis of the second hole 62 coincides with the axis of the third hole 71, a locking screw 72, a spring 73 and a positioning ball 74 are provided in the second hole 62 and the third hole 71, and the spring 73 is provided between the locking screw 72 and the positioning ball 74. The positioning ball 74, the spring 73 and the locking screw 72 are connected together.

[0046] During an operation, the operator places the positioning ball 74, the spring 73 and the locking screw 72 into the second hole 62 of the eccentric sleeve 6 and the third hole 71 of the clamping device 7. At this time, the axis of the second hole 62 coincides with the axis of the third hole 71. The locking screw 72 is then tightened to compress the spring 73. The spring 73 pushes the positioning ball 74 to be inserted between the external teeth 81 of the optical axis 8 to be processed, thereby circumferentially positioning the optical axis 8 to be processed.

[0047] The positioning ball 74, the spring 73 and the locking screw 72 can be separated or connected together. Among them, the locking screw 72 can be a locking screw.

[0048] A cylindrical sleeve 32 is provided on the connecting sleeve 3 , the axis of the cylindrical sleeve 32 coincides with the axis of the connecting sleeve 3 , and a thread 321 is provided inside the cylindrical sleeve 32 .

[0049] A first boss 33 is provided on the inner wall of the socket 3. The clamping device 7 is a conical structure. A second groove 75 is provided on the outer wall of the narrower end of the clamping device 7. The socket 3 is connected to the clamping device 7 through the cooperation of the first boss 33 and the second groove 75.

[0050] Please refer to Figure 4 , which is a schematic diagram of the structure of a fixture 1 for machining an eccentric shaft shown in an embodiment of the present application. A flange 63 is provided on the eccentric sleeve 6, and a plurality of third threaded holes 221 are provided on the first groove 22 of the machine tool connecting plate 2. The eccentric sleeve 6 is connected to the machine tool connecting plate 2 through the cooperation between the flange 63 and the third threaded holes 221.

[0051] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fixture for machining an eccentric shaft, characterized in that: include: A machine tool connection plate having a first inner cavity; An eccentric sleeve having a second inner cavity, wherein the axis of the second inner cavity and the axis of the machine tool connecting plate are not on the same straight line, and the eccentric sleeve is connected to the machine tool connecting plate; A connecting sleeve, arranged in the first inner cavity and the eccentric sleeve; A clamping device is disposed in the second inner cavity, and the axis of the clamping device coincides with the axis of the second inner cavity; the clamping device is used to clamp the optical axis to be processed; A second hole is provided on the outer wall of the eccentric sleeve, a third hole is provided on the outer wall of the clamping device, and locking screws are provided in the second hole and the third hole for positioning; an external tooth is provided on one end of the optical axis; a positioning ball is provided in the second hole and the third hole, and the positioning ball is connected to the locking screw; the positioning ball is inserted into the external tooth, and the processed eccentric shaft is circumferentially positioned by the locking screw and the positioning ball; A positioning bracket connected to the machine tool connection plate; The positioning top block is provided with a first hole in the positioning bracket, and the positioning top block is arranged in the first hole.

2. The fixture for machining an eccentric shaft according to claim 1, characterized in that: The machine tool connecting plate is provided with a first groove, and the positioning bracket is connected to the first groove.

3. The fixture for machining an eccentric shaft according to claim 2, characterized in that: The connecting sleeve is provided with two through holes, and the positioning bracket is inserted into the two through holes.

4. The fixture for machining an eccentric shaft according to claim 3, characterized in that: The positioning top block is provided with a first threaded hole; The positioning bracket is provided with a second threaded hole, in which a screw is provided, and the positioning bracket is fixedly connected to the positioning top block through the cooperation between the screw and the first threaded hole.

5. The fixture for machining an eccentric shaft according to claim 1, characterized in that: A first boss is provided on the inner wall of the socket; A second groove is provided on the outer wall of the clamping device, and the socket is connected to the clamping device through the cooperation between the first boss and the second groove.

6. The fixture for machining an eccentric shaft according to claim 1, characterized in that: A cylindrical sleeve is arranged on the connecting sleeve, the axis of the cylindrical sleeve coincides with the axis of the connecting sleeve, and a thread is arranged inside the cylindrical sleeve.

7. The fixture for machining an eccentric shaft according to claim 1, characterized in that: A spring is arranged in the second hole and the third hole, and the spring is arranged between the locking screw and the positioning ball; the positioning ball is connected to the locking screw through the spring.

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