A transmission shaft milling positioning device for a universal milling machine

Abstract

The utility model discloses a kind of transmission shaft milling positioning devices for universal milling machine, belong to the related technical field of universal milling machine, a kind of transmission shaft milling positioning device for universal milling machine, including base and the load-bearing seat of rotation connection in the top of the base and be set up in circular structure, the edge portion of the load-bearing seat is integrally formed with boss, and the boss is fixedly connected with first connecting shaft, the edge portion of the base is integrally formed with guide table, the top of the guide table is provided with guide slot, the inner side of the guide slot is slidably connected with the jaw of the L-shaped structure, the front end of the jaw is integrally formed with protruding tooth, the second connecting shaft is integrally formed on the jaw, connecting arm is installed between the second connecting shaft and the first connecting shaft, it can make the positioning datum of cutting transmission shaft and design datum coincide, and ensure that clamping force is evenly distributed, ensure the precision of cutting in transmission shaft machining process.

Description

Technical Field

[0001] This utility model relates to the technical field of universal milling machines, and more specifically, to a milling positioning device for a universal milling machine with a transmission shaft. Background Technology

[0002] A universal milling machine is a machine tool with multiple machining functions, capable of machining planes, inclined surfaces, grooves, helical surfaces, gears, and other shapes by changing milling cutters and attachments. Its core advantage lies in its ability to expand the machining range through different configurations. For example, when equipped with an indexing head or a rotary table, it can machine complex shapes such as cams and helical grooves.

[0003] Existing positioning devices for universal milling machines used in drive shaft machining have problems such as misalignment between the positioning datum and the design datum, and uneven distribution of clamping force. These problems may cause the workpiece to deviate from its original position during machining or cause dimensional deviations due to elastic deformation, thus affecting the cutting accuracy during drive shaft machining. Therefore, we propose a drive shaft milling positioning device for universal milling machines to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a universal milling machine drive shaft milling positioning device, which can make the positioning reference of the cutting drive shaft coincide with the design reference and ensure the uniform distribution of clamping force, thus ensuring the cutting accuracy during the machining of the drive shaft.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A universal milling machine drive shaft milling positioning device includes a base and a support seat rotatably connected above the base and arranged in a circular structure. The edge of the support seat is integrally formed with a boss, and a first connecting shaft is fixedly connected to the boss.

[0009] The edge of the base is integrally formed with a guide platform, and the top of the guide platform is provided with a guide groove.

[0010] The inner side of the guide groove is slidably connected to a gripper with an L-shaped structure. The front end of the gripper is integrally formed with a protruding tooth, and a second connecting shaft is integrally formed on the gripper.

[0011] A connecting arm is installed between the second connecting shaft and the first connecting shaft;

[0012] A connecting frame is welded to the end of the guide platform, and a lead screw is screwed onto the connecting frame. A connecting seat that is rotatably connected to the end of the lead screw is fixedly connected to the end of the gripper corresponding to the connecting frame. A handwheel is installed at the end of the lead screw.

[0013] Furthermore, a spring is fitted at the end of the lead screw, one end of the spring abutting against the handwheel, and the other end of the spring abutting against the connecting frame.

[0014] Furthermore, three bosses are specifically provided in the radial position of the bearing seat, and the angle between the center lines of two adjacent bosses and the center line of the bearing seat is 120°.

[0015] Furthermore, the guide platform is specifically provided in three parts, and the angle between the center lines of two adjacent protrusions and the center line of the bearing seat is 120°.

[0016] Furthermore, the end of the guide groove away from the base has a countersunk hole that penetrates the guide platform.

[0017] Furthermore, bearings are installed at both ends of the connecting arm, and the bearings are respectively interference-fitted with the first connecting shaft and the second connecting shaft.

[0018] Furthermore, a shaft head is fixedly connected to the center of the upper surface of the base, and the shaft head is connected to the bearing seat through a bearing.

[0019] 3. Beneficial effects

[0020] Compared with existing technologies, the advantages of this utility model are:

[0021] (1) In this scheme, the screw is driven by a handwheel and the connecting frame is rotated manually, so that the gripper moves towards the guide groove on the guide table. The two ends of the connecting arm rotate with the first connecting shaft and the second connecting shaft respectively. While the bearing seat rotates with the base, the other two grippers are linked to abut against the drive shaft blank until the protruding teeth on the end of the gripper are tightly fitted with the outer wall of the drive shaft blank. This completes the centering clamping of the drive shaft blank, the positioning reference coincides with the design reference, and the clamping force is evenly distributed, ensuring the cutting accuracy during the drive shaft processing.

[0022] (2) In this scheme, during the process of using the handwheel to drive the lead screw to rotate, the spring sleeved on the lead screw can be compressed and deformed. Thus, the elastic force of the spring can be used to effectively prevent the lead screw from loosening after it stops, thereby ensuring the stability of the positioning of the transmission shaft blank. Attached Figure Description

[0023] Figure 1This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the base structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the support structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the gripper structure of this utility model.

[0027] Explanation of the labels in the diagram:

[0028] 1. Base; 2. Bearing seat; 3. Shaft head; 4. First connecting shaft; 5. Guide table; 6. Guide groove; 7. Countersunk hole; 8. Clamping jaw; 9. Second connecting shaft; 10. Raised tooth; 11. Connecting arm; 12. Connecting frame; 13. Connecting seat; 14. Lead screw; 15. Handwheel; 16. Spring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Example:

[0031] Please see Figure 1-4 A universal milling machine drive shaft milling positioning device includes a base 1 and a bearing seat 2 rotatably connected above the base 1 and arranged in a circular structure. The edge of the bearing seat 2 is integrally formed with a boss, and a first connecting shaft 4 is fixedly connected to the boss.

[0032] The edge of the base 1 is integrally formed with a guide platform 5, and the top of the guide platform 5 is provided with a guide groove 6;

[0033] The inner side of the guide groove 6 is slidably connected to a gripper 8 with an L-shaped structure. The front end of the gripper 8 has an integrally formed tooth 10, and a second connecting shaft 9 is integrally formed on the gripper 8.

[0034] A connecting arm 11 is installed between the second connecting shaft 9 and the first connecting shaft 4;

[0035] A connecting frame 12 is welded to the end of the guide table 5. A lead screw 14 is screwed onto the connecting frame 12. A connecting seat 13 that is rotatably connected to the end of the lead screw 14 is fixedly connected to the end of the gripper 8 corresponding to the connecting frame 12. A handwheel 15 is installed at the end of the lead screw 14.

[0036] It should be noted that when using the universal milling machine's drive shaft milling positioning device, the drive shaft blank to be cut is first placed on the bearing seat 2. Then, the screw 14 is driven by the handwheel 15 to rotate in conjunction with the connecting frame 12, thereby causing the gripper 8 to move towards the drive shaft blank in conjunction with the guide groove 6 on the guide table 5. The two ends of the connecting arm 11 rotate in conjunction with the first connecting shaft 4 and the second connecting shaft 9 respectively. While the bearing seat 2 rotates in conjunction with the base 1, the other two grippers 8 are simultaneously engaged with the drive shaft blank until the protruding teeth 10 at the end of the gripper 8 are tightly fitted with the outer wall of the drive shaft blank. This completes the centered clamping of the drive shaft blank, ensuring that the positioning reference coincides with the design reference and that the clamping force is evenly distributed, thus guaranteeing the cutting accuracy during the drive shaft machining process.

[0037] like Figure 1 As shown, a spring 16 is sleeved at the end of the lead screw 14. One end of the spring 16 abuts against the handwheel 15, and the other end of the spring 16 abuts against the connecting bracket 12.

[0038] It should be noted that during the process of using the handwheel 15 to drive the lead screw 14 to rotate, the spring 16 sleeved on the lead screw 14 can be compressed and deformed. Thus, the elastic force of the spring 16 can effectively prevent the lead screw 14 from loosening after it is suspended, thereby ensuring the stability of the positioning of the transmission shaft blank.

[0039] like Figure 2 , Figure 3 As shown, there are three bosses in the radial position of the bearing seat 2, and the angle between the center lines of two adjacent bosses and the center line of the bearing seat 2 is 120°. There are three guide platforms 5, and the angle between the center lines of two adjacent bosses and the center line of the bearing seat 2 is 120°.

[0040] It should be noted that the positioning datum coincides with the design datum and ensures that the clamping force is evenly distributed, thus guaranteeing the cutting accuracy during the machining of the drive shaft.

[0041] like Figure 1 As shown, the guide groove 6 has a countersunk hole 7 that penetrates the guide platform 5 at the end away from the base 1;

[0042] It should be noted that the base 1 can be installed and fixed by setting the countersunk hole 7.

[0043] like Figure 1 As shown, bearings are installed at both ends of the connecting arm 11, and the bearings are respectively interference-fitted to the first connecting shaft 4 and the second connecting shaft 9.

[0044] It should be noted that the rotation accuracy of the end of the connecting arm 11 was ensured.

[0045] like Figure 1 , Figure 2 As shown, a shaft head 3 is fixedly connected to the middle of the upper surface of the base 1, and the shaft head 3 is connected to the bearing seat 2 through a bearing;

[0046] It should be noted that this reduces the resistance of the bearing seat 2 during rotation and ensures the rotational accuracy of the bearing seat 2.

[0047] In use: First, place the drive shaft blank to be cut on the bearing seat 2. Then, manually drive the lead screw 14 with the handwheel 15 to rotate in conjunction with the connecting frame 12. This causes the gripper 8 to move towards the drive shaft blank in conjunction with the guide groove 6 on the guide table 5. The two ends of the connecting arm 11 rotate in conjunction with the first connecting shaft 4 and the second connecting shaft 9 respectively. While the bearing seat 2 rotates in conjunction with the base 1, the other two grippers 8 are linked to abut against the drive shaft blank in sync until the protruding teeth 10 at the end of the gripper 8 are tightly fitted against the outer wall of the drive shaft blank.

[0048] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A universal milling machine drive shaft milling positioning device, comprising a base (1) and a bearing seat (2) rotatably connected above the base (1) and arranged in a circular structure, characterized in that: The edge of the bearing seat (2) is integrally formed with a boss, and a first connecting shaft (4) is fixedly connected to the boss; The edge of the base (1) is integrally formed with a guide platform (5), and the top of the guide platform (5) is provided with a guide groove (6). The guide groove (6) is slidably connected to a gripper (8) with an L-shaped structure. The front end of the gripper (8) is integrally formed with a protruding tooth (10), and a second connecting shaft (9) is integrally formed on the gripper (8). A connecting arm (11) is installed between the second connecting shaft (9) and the first connecting shaft (4); The guide platform (5) is welded to a connecting frame (12), and a lead screw (14) is screwed onto the connecting frame (12). A connecting seat (13) is fixedly connected to the end of the jaw (8) of the connecting frame (12) and rotates with the end of the lead screw (14). A handwheel (15) is installed at the end of the lead screw (14).

2. The universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: A spring (16) is fitted at the end of the lead screw (14). One end of the spring (16) abuts against the handwheel (15), and the other end of the spring (16) abuts against the connecting frame (12).

3. The universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: The boss is specifically provided in three radial positions on the bearing seat (2), and the angle between the center lines of two adjacent bosses and the center line of the bearing seat (2) is 120°.

4. The universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: The guide platform (5) is specifically provided in three parts, and the angle between the center line of two adjacent protrusions and the center line of the bearing seat (2) is 120°.

5. A universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: The guide groove (6) has a countersunk hole (7) that passes through the guide platform (5) at one end away from the base (1).

6. A universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: Both ends of the connecting arm (11) are equipped with bearings, and the bearings are respectively interference-fitted with the first connecting shaft (4) and the second connecting shaft (9).

7. A universal milling machine drive shaft milling positioning device according to claim 1, characterized in that: A shaft head (3) is fixedly connected to the middle of the upper surface of the base (1), and the shaft head (3) is connected to the bearing seat (2) through a bearing.

Images