Eccentric positioning jig for eccentric shaft machining

Abstract

The utility model discloses eccentric positioning fixture for eccentric rotating shaft processing in the technical field of machining equipment, including the fixed frame, the inside one side fixed mounting of fixed frame has the locating seat, one side limit rotary connection has the mounting block at the locating seat, the surface of one side of mounting block is provided with the sliding slot, the inside limit sliding installation of sliding slot has the sliding block, one side fixed mounting has the first motor at the sliding block, the output fixed mounting of first motor has the connecting disc, rotates through the first motor drive connecting disc, can drive slide axle and center and draw close along the guide hole, realizes the effect of the quick clamping of different size eccentric rotating shaft end portion, and the eccentric rotating shaft of clamping can be driven to carry out the lateral distance adjustment in the inside of sliding slot through the electric push rod set, and the other end of eccentric rotating shaft and the thimble seat between convenient concentric abutment, realize the function of the fixation of eccentric rotating shaft both ends.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment technology, specifically relating to an eccentric positioning fixture for machining eccentric shafts. Background Technology

[0002] An eccentric shaft, also known as an eccentric rotating shaft, is a mechanical part characterized by the fact that the axis of one outer cylindrical surface is parallel to but does not coincide with the axis of another outer cylindrical surface, meaning their centers do not coincide. This design allows it to produce eccentric motion during rotation. It is often fixed to a motor or other rotating shaft through an eccentric hole to achieve specific mechanical functions. Eccentric shafts are widely used in mechanical transmission systems, such as automotive steering mechanisms and textile machinery. Their eccentric structure design enables asymmetric motion transmission. Traditional machining methods rely on manual adjustment of the eccentricity, resulting in low positioning accuracy, low efficiency, and complex operation, leading to unstable machining quality and high costs. While some existing tooling can clamp eccentric shafts, efficient and precise positioning is difficult to achieve, especially in mass production where repeated positioning errors significantly affect product consistency. Therefore, we propose an eccentric positioning fixture for eccentric shaft machining. Utility Model Content

[0003] The purpose of this invention is to provide an eccentric positioning fixture for machining eccentric shafts, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an eccentric positioning fixture for machining eccentric rotating shafts, comprising a fixed frame, a positioning seat fixedly installed on one side of the fixed frame, a mounting block rotatably connected to one side of the positioning seat, a sliding groove on one side surface of the mounting block, a slider slidably installed inside the sliding groove, a first motor fixedly installed on one side of the slider, a connecting plate fixedly installed at the output end of the first motor, a plurality of arc-shaped holes evenly formed around the surface of the connecting plate, a support frame fixedly installed on one side of the mounting block, guide holes evenly formed around the support frame on one side surface of the connecting plate, a sliding shaft slidably installed inside the arc-shaped holes, one end of the sliding shaft extending to the inside of the guide holes and a clamping block fixedly installed at the end, a fixed plate fixedly installed at one end of the sliding groove, an electric push rod fixedly installed on the outside of the fixed plate, a connecting shaft slidably passing through the surface of the fixed plate, one end of the connecting shaft being fixedly connected to the output end of the electric push rod, and the other end of the connecting shaft being fixedly connected to one end of the slider.

[0005] Preferably, a lead screw is rotatably mounted between the fixed frames, a second motor is fixedly mounted on the outside of the fixed frames, one end of the lead screw is fixedly connected to the output end of the second motor, a slide is threaded onto the surface of the lead screw, a third motor is fixedly mounted on the top of the slide, a fixed shaft is fixedly connected to the output end of the third motor, and a pin seat is fixedly mounted on the end of the fixed shaft.

[0006] Preferably, guide rods are fixedly connected between the fixed frames, and the guide rods are symmetrically distributed and installed on both sides of the lead screw, with the slide block slidably sleeved on the surface of the guide rods.

[0007] Preferably, a protective pad is fixedly installed on the end surface of the clamping block.

[0008] Preferably, a control switch is installed on the outer side of the fixing frame.

[0009] Preferably, fixing pads are symmetrically fixed at the four bottom corners of the fixing frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The first motor drives the connecting plate to rotate, which in turn drives the sliding shaft to move towards the center along the guide hole, achieving the effect of quickly clamping the ends of eccentric shafts of different sizes. The electric push rod can drive the clamped eccentric shaft to adjust the lateral distance inside the slide groove, which facilitates the concentric abutment between the other end of the eccentric shaft and the ejector seat, thus fixing both ends of the eccentric shaft. The operation of the third motor can drive the eccentric shaft to rotate, ensuring the stability of the fixture during the processing. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention. Figure 3 This is a schematic diagram of the mounting block structure of this utility model; Figure 4 This is a schematic diagram of the connecting disc structure of this utility model.

[0012] In the diagram: 1. Fixing frame; 2. Positioning seat; 3. Mounting block; 4. Slide groove; 5. Sliding block; 6. First motor; 7. Connecting plate; 8. Arc-shaped hole; 9. Support frame; 10. Guide hole; 11. Sliding shaft; 12. Clamping block; 13. Protective pad; 14. Fixing plate; 15. Electric push rod; 16. Connecting shaft; 17. Lead screw; 18. Second motor; 19. Slide; 20. Third motor; 21. Fixing shaft; 22. Ejector pin seat; 23. Guide rod; 24. Control switch; 25. Fixing pad. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-4 This utility model provides a technical solution: an eccentric positioning fixture for machining eccentric rotating shafts, including a fixed frame 1. A positioning seat 2 is fixedly installed on one side of the fixed frame 1. A mounting block 3 is rotatably connected to one side of the positioning seat 2. A sliding groove 4 is formed on one side surface of the mounting block 3. A slider 5 is slidably installed inside the sliding groove 4. A first motor 6 is fixedly installed on one side of the slider 5. A connecting plate 7 is fixedly installed at the output end of the first motor 6. Multiple sets of arc-shaped holes 8 are evenly formed on the surface of the connecting plate 7. A support frame 9 is fixedly installed on one side of the mounting block 3. The support frame 9 has guide holes 10 evenly distributed around one side of the connecting plate 7. A sliding shaft 11 is slidably installed inside the arc-shaped hole 8. One end of the sliding shaft 11 extends to the inside of the guide hole 10 and a clamping block 12 is fixedly installed at the end. A fixing plate 14 is fixedly installed at one end of the slide groove 4. An electric push rod 15 is fixedly installed on the outside of the fixing plate 14. A connecting shaft 16 is slidably inserted through the surface of the fixing plate 14. One end of the connecting shaft 16 is fixedly connected to the output end of the electric push rod 15, and the other end of the connecting shaft 16 is fixedly connected to one end of the slider 5.

[0015] Specifically, a lead screw 17 is installed between the fixed frames 1 for limiting rotation. A second motor 18 is fixedly installed on the outside of the fixed frame 1. One end of the lead screw 17 is fixedly connected to the output end of the second motor 18. A slide 19 is threadedly connected to the surface of the lead screw 17. A third motor 20 is fixedly installed on the top of the slide 19. A fixed shaft 21 is fixedly connected to the output end of the third motor 20. A pin seat 22 is fixedly installed at the end of the fixed shaft 21.

[0016] Specifically, guide rods 23 are fixedly connected between the fixed frames 1. The guide rods 23 are symmetrically distributed and installed on both sides of the lead screw 17, and the slide block 19 is slidably sleeved on the surface of the guide rods 23.

[0017] Specifically, a protective pad 13 is fixedly installed on the end surface of the clamping block 12.

[0018] Specifically, a control switch 24 is installed on the outer side of the mounting bracket 1.

[0019] Specifically, fixing pads 25 are symmetrically fixed at the four corners of the bottom of the fixing frame 1.

[0020] In this embodiment, one end of the eccentric rotating shaft is placed between four sets of clamping blocks 12. The operation of the first motor 6 can drive the connecting plate 7 to rotate. The rotation of the connecting plate 7 can drive the sliding shaft 11 to move towards the center through the arc-shaped hole 8 and the guide hole 10, thereby causing the clamping blocks 12 to clamp and fix the end of the eccentric rotating shaft. The operation of the second motor 18 can drive the lead screw 17 to rotate. The rotation of the lead screw 17 can drive the slide block 19 to move towards the mounting block 3, so that the third motor 20 above, the fixed shaft 21 and The ejector seat 22 moves laterally in sync. Based on the difference between the center of the other end of the eccentric rotating shaft and the ejector seat 22, the connecting shaft 16 and the slider 5 are moved inside the slide groove 4 by the electric push rod 15, thereby adjusting the lateral position of the mounting block 3. This makes it easy to align the center of the other end of the eccentric rotating shaft with the center point of the ejector seat 22 and make contact. The operation of the third motor 20 can drive the fixed shaft 21 and the ejector seat 22 to rotate, thereby driving the eccentric rotating shaft to rotate synchronously, which is convenient for processing.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eccentric positioning fixture for machining eccentric shafts, comprising a fixing frame (1), characterized in that: A positioning seat (2) is fixedly installed on one side of the fixed frame (1). A mounting block (3) is rotatably connected to one side of the positioning seat (2). A groove (4) is opened on one side surface of the mounting block (3). A slider (5) is slidably installed inside the groove (4). A first motor (6) is fixedly installed on one side of the slider (5). A connecting plate (7) is fixedly installed at the output end of the first motor (6). Multiple sets of arc-shaped holes (8) are evenly opened in a ring on the surface of the connecting plate (7). A support frame (9) is fixedly installed on one side of the mounting block (3). The support frame (9) is located on one side surface of the connecting plate (7). Guide holes (10) are evenly provided in the circumference. A sliding shaft (11) is slidably installed on the inner side of the arc-shaped hole (8). One end of the sliding shaft (11) extends to the inner side of the guide hole (10) and a clamping block (12) is fixedly installed at the end. A fixing plate (14) is fixedly installed at one end of the sliding groove (4). An electric push rod (15) is fixedly installed on the outer side of the fixing plate (14). A connecting shaft (16) is slidably passed through the surface of the fixing plate (14). One end of the connecting shaft (16) is fixedly connected to the output end of the electric push rod (15), and the other end of the connecting shaft (16) is fixedly connected to one end of the slider (5).

2. The eccentric positioning fixture for machining eccentric shafts according to claim 1, characterized in that: A lead screw (17) is rotatably mounted between the fixed frames (1). A second motor (18) is fixedly mounted on the outside of the fixed frame (1). One end of the lead screw (17) is fixedly connected to the output end of the second motor (18). A slide (19) is threaded onto the surface of the lead screw (17). A third motor (20) is fixedly mounted on the top of the slide (19). A fixed shaft (21) is fixedly connected to the output end of the third motor (20). A pin seat (22) is fixedly mounted at the end of the fixed shaft (21).

3. The eccentric positioning fixture for machining eccentric shafts according to claim 2, characterized in that: Guide rods (23) are fixedly connected between the fixed frames (1). The guide rods (23) are symmetrically distributed and installed on both sides of the lead screw (17). The slide block (19) is slidably sleeved on the surface of the guide rods (23).

4. The eccentric positioning fixture for machining eccentric shafts according to claim 1, characterized in that: A protective pad (13) is fixedly installed on the end surface of the clamp (12).

5. The eccentric positioning fixture for machining eccentric shafts according to claim 1, characterized in that: A control switch (24) is installed on the outer side of the mounting bracket (1).

6. The eccentric positioning fixture for machining eccentric shafts according to claim 1, characterized in that: The four bottom corners of the fixing frame (1) are symmetrically fixed with fixing pads (25).

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