Clamp for machining spiral bevel gear

Abstract

The utility model relates to the technical field of bevel gear machining, and discloses a clamp for machining a spiral bevel gear. The clamp for machining the spiral bevel gear comprises a bottom plate, a sliding groove is formed in the top face of the bottom plate, a supporting frame is fixedly installed above the bottom plate, a stepping motor is fixedly installed in the supporting frame, a bracket is fixedly installed above the bottom plate, a connecting bearing is installed in the bracket in an embedded mode, and a clamping groove is formed in the bottom plate. A base is mounted in the connecting bearing in an embedded mode, a fixing block is fixedly mounted at the tail end of the base, a long-axis bolt is taken down when the limiting pipe is replaced, then the fixing block moves towards the axis of the base, the embedded state between the fixing block and the limiting pipe is conveniently canceled, and the limiting pipe can be conveniently replaced. And after the three adjacent fixing blocks are taken down, the position of the limiting pipe can be changed, so that the limiting pipe can be taken down conveniently, and the situation that the replacement operation of the limiting pipe is affected due to blocking of the fixing blocks when the limiting pipe is replaced can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of bevel gear processing technology, specifically a fixture for processing spiral bevel gears. Background Technology

[0002] Spiral bevel gears, also known as spiral conical gears, are commonly used for motion and power transmission between two intersecting shafts. The teeth of a bevel gear are distributed on the surface of a cone, and the tooth profile gradually decreases from the large end to the small end. Milling spiral bevel gears usually requires the use of a matching fixture to fix the workpiece.

[0003] A reference to the existing Chinese utility model patent (CN211052752U) is available, which discloses a clamping device for milling spiral bevel gears. The device includes a pull rod and a mounting sleeve with an inner conical surface, coaxially fitted around the front end of the pull rod. The rear end of the pull rod is connected to a machine tool hydraulic cylinder tensioning mechanism, allowing the pull rod to slide axially relative to the mounting sleeve. An elastic chuck is installed inside the mounting sleeve, with its tail threaded to the pull rod and its head having an outer conical surface matching the inner conical surface of the mounting sleeve. A flat-end locating pin is inserted into the side of the mounting sleeve, abutting against the elastic chuck. A locating sleeve is connected to the front end of the mounting sleeve via a fastening bolt flange. A bushing is fitted onto the inner circle of the locating sleeve at its front opening, and a tool setting gauge is provided on its outer circle. The end of the tool setting gauge is connected to a contact via a nut. This utility model uses the pull rod to drive the elastic chuck to slide within the mounting sleeve, causing the elastic chuck to contract and clamp the workpiece securely. The clamping is convenient, stable, and firm, contributing to improved processing efficiency.

[0004] When machining bevel gears, the workpiece needs to be rotated to perform helical machining on the surface. Because there is a certain relative pressure between the milling cutter and the workpiece during milling, the rotating shaft of the fixture may bend after being subjected to pressure for a long time, causing a change in the relative position between the fixture and the milling cutter, resulting in misalignment and affecting machining accuracy. At the same time, existing fixtures generally achieve a fixing effect by applying pressure to increase the outer diameter of the internal ring part and fitting it into the center opening structure of the workpiece. After long-term use, the internal ring part will undergo plastic deformation due to metal fatigue. In order to change the outer diameter under pressure, there is a tapered structure between the inner wall of the ring part and the base, which is very inconvenient to replace. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a fixture for machining spiral bevel gears, which has advantages such as avoiding bending under pressure and facilitating the replacement of deformed parts, thus solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a fixture for machining spiral bevel gears, comprising: a base plate, a groove on the top surface of the base plate, a support frame fixedly mounted above the base plate, a stepper motor fixedly mounted inside the support frame, a bracket fixedly mounted above the base plate, a connecting bearing fitted inside the bracket, a base fitted inside the connecting bearing, a fixing block fixedly mounted at the end of the base, a long shaft bolt inserted inside the fixing block, a limit tube fitted outside the fixing block, a pressing shaft inserted at the center of the base, a support rod fixedly mounted above the base plate, a hydraulic piston inserted at the top of the support rod, a transition bearing fitted at the movable end of the hydraulic piston, a connecting block fitted outside the transition bearing, a limit bearing fitted outside the connecting block, a limit frame fitted outside the limit bearing, and a slider fixedly mounted at the bottom end of the limit frame; the base plate can limit the movement direction of the slider through the groove.

[0009] As a preferred embodiment of this utility model, the slide groove is symmetrically arranged on the left and right sides of the right end of the base plate with the center of the base plate as the reference. The stepper motor is fixedly connected to the base plate through a support frame. The base is rotatably connected to the bracket through a connecting bearing. The support frame can limit the position of the stepper motor.

[0010] As a preferred technical solution of this utility model, the front end center of the base is provided with an opening structure that matches the size of the stepper motor shaft, and the base is fixedly connected to the stepper motor shaft by interlocking; the base can restrict the position of the fixing block.

[0011] As a preferred technical solution of this utility model, the outer side of the fixing block is provided with a toothed structure, there are four fixing blocks in total, and two long shaft bolts are inserted and installed on the top of each fixing block. The fixing blocks are installed in a ring at the end of the base with the center of the base as the reference through the long shaft bolts; the fixing blocks can facilitate the deformation of the limiting tube.

[0012] As a preferred technical solution of this utility model, the inner wall of the limiting tube is provided with an annular structure that fits into the toothed structure on the outer side of the fixing block. The extrusion shaft and the base are connected in a sliding manner. The top end of the extrusion shaft is provided with an annular protrusion with an outer diameter consistent with the outer diameter of the limiting tube, and the top end of the annular protrusion of the extrusion shaft is provided with a toothed structure. When the limiting tube is pressed, it will deform under the guidance of the fixing block, thereby increasing its outer diameter.

[0013] As a preferred embodiment of this utility model, the hydraulic piston is fixedly connected to the base plate via a support rod, and the movable end of the hydraulic piston is rotatably connected to the connecting block via a transition bearing. The axis of the connecting block is in the same straight line as the axis of the extrusion shaft, and the front end of the connecting block is provided with a toothed structure that engages with the extrusion shaft. The hydraulic piston can drive the connecting block to move.

[0014] As a preferred embodiment of this utility model, the connecting block is rotatably connected to the limiting frame through the limiting bearing, the bottom end of the slider is fitted into the sliding groove, and the slider is slidably connected to the base plate through the sliding groove; the slider can support the limiting frame.

[0015] Compared with the prior art, the present invention provides a fixture for machining spiral bevel gears, which has the following advantages:

[0016] 1. This utility model features four fixing blocks, each with two long-axis bolts inserted above it. The fixing blocks are installed in a ring around the center of the base, with no contact between them. The inner wall of the limiting tube has a ring structure that engages with the toothed structure on the outer side of the fixing blocks. When replacing the limiting tube, the long-axis bolts are removed, and the fixing blocks are moved toward the axis of the base to release the engagement between the fixing blocks and the limiting tube. After removing three adjacent fixing blocks, the position of the limiting tube can be changed to facilitate its removal. This method avoids the fixing blocks obstructing the replacement of the limiting tube.

[0017] 2. This utility model features an extrusion shaft that is inserted and installed at the center of the base. The inner arc surface of the outer fixing block of the extrusion shaft contacts the shaft, forming a sliding connection between the extrusion shaft and the base. The top of the extrusion shaft has an annular protrusion with an outer diameter matching that of the limiting tube, and the top of the annular protrusion has a toothed structure. Simultaneously, the front end of the connecting block has a toothed structure that engages with the extrusion shaft. The connecting block is rotatably connected to the limiting frame via a limiting bearing. The bottom end of the slider is fitted into the groove. During use, a hydraulic piston drives the connecting block to move towards the extrusion shaft, causing the toothed structure of the connecting block to engage with the toothed structure of the extrusion shaft. This allows the hydraulic piston to drive the extrusion shaft to apply pressure to the limiting tube. When processing the gear, the pressure on the gear can be transmitted to the extrusion shaft through the limiting tube and the fixing block. The force on the extrusion shaft can be transmitted to the top of the limiting frame through the connecting block. In this way, the gear is supported on both sides, maintaining force balance during processing and preventing the fixture from bending during processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the stepper motor mounting structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the limiting tube of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the connecting block of this utility model;

[0022] The components are as follows: 1. Base plate; 11. Slide groove; 12. Support frame; 13. Stepper motor; 14. Bracket; 15. Connecting bearing; 16. Base; 17. Fixing block; 18. Long shaft bolt; 19. Limiting tube; 110. Extrusion shaft; 111. Support rod; 112. Hydraulic piston; 113. Adapter bearing; 114. Connecting block; 115. Limiting bearing; 116. Limiting frame; 117. Slider. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1 - Figure 4In this embodiment, a jig for machining spiral bevel gears includes: a base plate 1, a groove 11 on the top surface of the base plate 1, a support frame 12 fixedly mounted above the base plate 1, a stepper motor 13 fixedly mounted inside the support frame 12, a bracket 14 fixedly mounted above the base plate 1, a connecting bearing 15 fitted inside the bracket 14, a base 16 fitted inside the connecting bearing 15, a fixing block 17 fixedly mounted at the end of the base 16, a long shaft bolt 18 inserted inside the fixing block 17, and a fixing block 17 with a fixed outer side. A limiting tube 19 is fitted and installed. A pressing shaft 110 is inserted through the center of the base 16. A support rod 111 is fixedly installed above the base plate 1. A hydraulic piston 112 is inserted through the top of the support rod 111. A transition bearing 113 is fitted and installed at the movable end of the hydraulic piston 112. A connecting block 114 is fitted and installed on the outside of the transition bearing 113. A limiting bearing 115 is fitted and installed on the outside of the connecting block 114. A limiting frame 116 is fitted and installed on the outside of the limiting bearing 115. A slider 117 is fixedly installed at the bottom end of the limiting frame 116.

[0027] The slide groove 11 is symmetrically arranged on the left and right sides of the right end of the base plate 1 with the center of the base plate 1 as the reference. The stepper motor 13 is fixedly connected to the base plate 1 through the support frame 12. The base 16 is rotatably connected to the bracket 14 through the connecting bearing 15. The front center of the base 16 is provided with an opening structure that matches the size of the stepper motor 13 shaft. The base 16 is fixedly connected to the shaft of the stepper motor 13 by insertion. The outer side of the fixing block 17 is provided with a toothed structure. There are four fixing blocks 17 in total, and two long shaft bolts 18 are inserted and installed on the top of each fixing block 17. The fixing blocks 17 are installed in a ring at the end of the base 16 with the center of the base 16 as the reference through the long shaft bolts 18. The inner wall of the limiting tube 19 is provided with a ring structure that fits into the toothed structure on the outer side of the fixing block 17. The extrusion shaft 110 and the base 16 are slidably connected. The top end of the extrusion shaft 110 is provided with an annular protrusion with an outer diameter consistent with the outer diameter of the limiting tube 19, and the top end of the annular protrusion of the extrusion shaft 110 is provided with a toothed structure. The hydraulic piston 112 is fixedly connected to the base plate 1 through the support rod 111. The movable end of the hydraulic piston 112 is rotatably connected to the connecting block 114 through the transition bearing 113. The axis of the connecting block 114 is in the same straight line as the axis of the extrusion shaft 110. The front end of the connecting block 114 is provided with a toothed structure that fits into the extrusion shaft 110. The connecting block 114 is rotatably connected to the limiting frame 116 through the limiting bearing 115. The bottom end of the slider 117 is fitted into the slide groove 11, and the slider 117 is slidably connected to the base plate 1 through the slide groove 11.

[0028] Specifically, the base plate 1 can limit the movement direction of the slider 117 through the slide groove 11, the support frame 12 can limit the position of the stepper motor 13, the stepper motor 13 can drive the base 16 to rotate, the bracket 14 can limit the position of the base 16, the connecting bearing 15 can facilitate the rotation of the base 16, the base 16 can limit the position of the fixing block 17, the fixing block 17 can facilitate the deformation of the limiting tube 19, the long shaft bolt 18 can limit the position of the fixing block 17, and the limiting tube 19 will deform under the guidance of the fixing block 17 when under pressure, so that the outer... With the increased diameter, the extrusion shaft 110 can easily apply pressure to the limiting tube 19, the support rod 111 can limit the position of the hydraulic piston 112, the hydraulic piston 112 can drive the connecting block 114 to move, the transition bearing 113 can facilitate the rotation of the connecting block 114, the connecting block 114 can engage with the extrusion shaft 110 to limit the position of the extrusion shaft 110, the limiting bearing 115 can facilitate the rotation of the connecting block 114, the limiting frame 116 can support the connecting block 114, and the slider 117 can support the limiting frame 116.

[0029] In use, there are four fixing blocks 17, and two long shaft bolts 18 are inserted and installed on the top of each fixing block 17. The fixing blocks 17 are installed in a ring at the end of the base 16 with the center of the base 16 as the reference, and the fixing blocks 17 do not contact each other. The inner wall of the limiting tube 19 is provided with a ring structure that fits into the toothed structure on the outside of the fixing block 17. When replacing the limiting tube 19, the long shaft bolts 18 are removed, and then the fixing blocks 17 are moved toward the axis of the base 16, which makes it easy to remove the fixing blocks 17 from the base 16. The engagement state between the limiting tubes 19 allows the position of the limiting tubes 19 to be changed after the three adjacent fixing blocks 17 are removed, facilitating the removal of the limiting tubes 19. This method avoids the obstruction of the fixing blocks 17 during the replacement of the limiting tubes 19, preventing the replacement operation from being affected by the fixing blocks 17. The extrusion shaft 110 is inserted and installed in the center of the base 16, with the inner arc surface of the outer fixing block 17 of the extrusion shaft 110 in contact. The extrusion shaft 110 and the base 16 form a sliding connection. The top of the extrusion shaft 110 is provided with an outer diameter that corresponds to the limiting tube. The extrusion shaft 110 has an annular protrusion with a uniform outer diameter of 19, and the top of the annular protrusion of the extrusion shaft 110 is provided with a toothed structure. At the same time, the front end of the connecting block 114 is provided with a toothed structure that fits into the extrusion shaft 110. The connecting block 114 is rotatably connected to the limiting frame 116 through the limiting bearing 115. The bottom end of the slider 117 is fitted into the slide groove 11. During use, the hydraulic piston 112 drives the connecting block 114 to move towards the extrusion shaft 110, so that the toothed structure of the connecting block 114 fits into the toothed structure of the extrusion shaft 110. This allows the hydraulic piston 112 to drive the extrusion shaft 110 to apply pressure to the limiting tube 19, increasing the outer diameter of the limiting tube 19 to fix the gear. When the gear is being processed, the pressure on the gear can be transmitted to the extrusion shaft 110 through the limiting tube 19 and the fixing block 17. The force on the extrusion shaft 110 can be transmitted to the top of the limiting frame 116 through the connecting block 114. In this way, the gear is supported on both sides, which can maintain the force balance during processing and prevent the fixture from bending during processing.

[0030] 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. A fixture for machining spiral bevel gears, characterized in that, include: A base plate (1) is provided with a sliding groove (11) on its top surface. A support frame (12) is fixedly installed above the base plate (1). A stepper motor (13) is fixedly installed inside the support frame (12). A bracket (14) is fixedly installed above the base plate (1). A connecting bearing (15) is fitted inside the bracket (14). A base (16) is fitted inside the connecting bearing (15). A fixing block (17) is fixedly installed at the end of the base (16). A long shaft bolt (18) is inserted inside the fixing block (17). A limit tube (1) is fitted on the outside of the fixing block (17). 9) A pressing shaft (110) is inserted through the center of the base (16). A support rod (111) is fixedly installed above the bottom plate (1). A hydraulic piston (112) is inserted through the top of the support rod (111). A transition bearing (113) is fitted into the movable end of the hydraulic piston (112). A connecting block (114) is fitted into the outer side of the transition bearing (113). A limit bearing (115) is fitted into the outer side of the connecting block (114). A limit frame (116) is fitted into the outer side of the limit bearing (115). A slider (117) is fixedly installed at the bottom end of the limit frame (116).

2. The fixture for machining spiral bevel gears according to claim 1, characterized in that: The slide (11) is symmetrically arranged on the left and right sides of the right end of the base plate (1) with the center of the base plate (1) as the reference. The stepper motor (13) is fixedly connected to the base plate (1) through the support frame (12). The base (16) is rotatably connected to the bracket (14) through the connecting bearing (15).

3. The fixture for machining spiral bevel gears according to claim 1, characterized in that: The base (16) has an opening structure at the front center that matches the size of the stepper motor (13) shaft. The base (16) is fixedly connected to the stepper motor (13) shaft by inserting it through.

4. The fixture for machining spiral bevel gears according to claim 1, characterized in that: The outer side of the fixing block (17) is provided with a toothed structure. There are four fixing blocks (17) in total, and two long shaft bolts (18) are inserted and installed on the top of each fixing block (17). The fixing block (17) is installed in a ring at the end of the base (16) with the center of the base (16) as the reference through the long shaft bolts (18).

5. A fixture for machining spiral bevel gears according to claim 1, characterized in that: The inner wall of the limiting tube (19) is provided with an annular structure that fits into the toothed structure on the outside of the fixing block (17). The extrusion shaft (110) and the base (16) are connected in a sliding manner. The top end of the extrusion shaft (110) is provided with an annular protrusion whose outer diameter is the same as that of the limiting tube (19), and the top end of the annular protrusion of the extrusion shaft (110) is provided with a toothed structure.

6. A fixture for machining spiral bevel gears according to claim 1, characterized in that: The hydraulic piston (112) is fixedly connected to the base plate (1) via a support rod (111). The movable end of the hydraulic piston (112) is rotatably connected to the connecting block (114) via a transition bearing (113). The axis of the connecting block (114) is in the same straight line as the axis of the extrusion shaft (110). The front end of the connecting block (114) is provided with a toothed structure that engages with the extrusion shaft (110).

7. A fixture for machining spiral bevel gears according to claim 1, characterized in that: The connecting block (114) is rotatably connected to the limiting frame (116) through the limiting bearing (115), the bottom end of the slider (117) is fitted into the sliding groove (11), and the slider (117) is slidably connected to the base plate (1) through the sliding groove (11).

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