Special clamp for machining lifting lug hole of automobile steel plate spring

Abstract

The utility model relates to the technical field of automobile part machining, in particular to a special clamp for machining an automobile steel plate spring lifting lug hole, which comprises a main body, and the top of the main body is fixedly connected with a clamping assembly; the thread block is driven by the variable frequency motor to ascend and descend on the lead screw, ascending and descending of the upper clamping plate can be controlled, the automobile steel plate spring can be clamped by the upper clamping plate and the lower clamping plate, accurate ascending and descending of the thread block can be achieved by accurately controlling the rotating speed and the rotating angle of the motor, high-precision clamping is achieved, and the machining efficiency is improved. The pressure sensor can be used for monitoring the clamping force applied to the steel plate spring by clamping equipment in real time, it is ensured that the clamping force is within the safety range, by accurately controlling the clamping force, deformation or damage of the steel plate spring caused by too large clamping force can be avoided, meanwhile, infirm clamping caused by insufficient clamping force can be prevented, and the clamping efficiency is improved. The pressure sensor can provide high-precision pressure feedback.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, specifically a special fixture for processing automotive leaf spring hanger holes. Background Technology

[0002] In the processing of leaf spring hanger holes in automobiles, leaf springs are the most widely used elastic element in automobile suspensions. They are an elastic beam with approximately equal strength, composed of several alloy spring leaves of equal width but unequal length and thickness.

[0003] Authorization announcement number CN213596341U discloses a special fixture for heat treatment forming of automotive leaf springs. This patented technology can automatically clamp the raw material plate on the hot raw material conveyor belt of leaf springs, align it as needed, and then place it into the interior of the heat treatment forming and quenching fixture for leaf springs. This effectively reduces manpower, changing the manual operation required for placing the leaf springs into the fixture to simply controlling the angle of placement, thus improving accuracy and practicality. However, this solution uses an electric push rod for mechanical clamping. Electric push rods also have some drawbacks when used for clamping. For example, the repeatability of electric push rods is generally not as good as pneumatic or hydraulic systems. Due to the control precision of the motor and the clearance of the transmission mechanism, the electric push rod may experience positional deviations during multiple reciprocating movements. The stroke accuracy of the electric push rod is affected by the control precision of the motor and transmission errors. If there is gear backlash or lead screw nut backlash in the transmission system, the actual stroke will not match the set stroke. Therefore, a special fixture for processing the lug holes of automotive leaf springs is needed to improve these problems. Utility Model Content

[0004] To address the problem of mechanical clamping using electric actuators in this solution, it is important to note that electric actuators also have some drawbacks when used for clamping. For example, the repeatability of electric actuators is generally lower than that of pneumatic or hydraulic systems. Due to the control precision of the motor and the backlash of the transmission mechanism, the electric actuator may experience positional deviations during multiple reciprocating movements. The stroke accuracy of the electric actuator is affected by the control precision of the motor and transmission errors. If there is gear backlash or lead screw nut backlash in the transmission system, the actual stroke will not match the set stroke. The purpose of this invention is to provide a special fixture for machining the lug holes of automotive leaf springs to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A special fixture for machining lug holes of automotive leaf springs includes a main body, on the top of which a clamping assembly is fixedly connected;

[0007] The main body includes a base plate, a lower clamping plate is fixedly connected to the top of the base plate, and a lower soft pad is fixedly connected to the top of the lower clamping plate.

[0008] The clamping assembly includes a vertical plate, a top plate fixedly connected to the side of the vertical plate, a variable frequency motor mounted on the top of the top plate, a lead screw fixedly connected to the output end of the variable frequency motor, a threaded block threadedly connected to the bottom of the lead screw, a connecting plate fixedly connected to the side of the threaded block, an upper clamping plate fixedly connected to the side of the connecting plate, and an upper soft pad fixedly connected to the bottom of the upper clamping plate.

[0009] As a preferred embodiment of this utility model, a pressure sensor is fixedly connected to the side of the upper clamping plate, a slide rail is fixedly connected to the side of the vertical plate, a slider is slidably connected to the side of the slide rail, and the slider is fixedly connected to the connecting plate.

[0010] As a preferred embodiment of this utility model, a bearing is fixedly connected to the bottom of the base plate, and the lead screw extends into the interior of the bearing.

[0011] As a preferred embodiment of this utility model, a processing base is installed on the top of the base plate, and a processing end is installed inside the processing base.

[0012] As a preferred embodiment of this utility model, a threaded support rod is provided inside the base plate, and a first nut is threadedly connected to the bottom of the threaded support rod.

[0013] As a preferred embodiment of this utility model, four threaded support rods and four first nuts are provided, with the first nuts being located on the top of the base plate.

[0014] As a preferred embodiment of this utility model, the bottom of the threaded support rod is threaded with a second nut, and four second nuts are provided, which are located at the bottom of the base plate.

[0015] As a preferred embodiment of this utility model, the bottom of the threaded support rod is fixedly connected with four feet.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, the threaded block is driven by a variable frequency motor to move up and down on the lead screw, thereby controlling the lifting and lowering of the upper clamping plate. This allows the upper and lower clamping plates to clamp the automotive leaf spring. By precisely controlling the speed and angle of the motor, the threaded block can be accurately lifted and lowered, achieving high-precision clamping with high repeatability and ensuring consistency in each clamping action. It also achieves a large torque output, generating a large clamping force that can be adjusted as needed.

[0018] 2. In this utility model, a pressure sensor can be used to monitor the clamping force applied to the leaf spring by the clamping device in real time, ensuring that the clamping force is within a safe range. By precisely controlling the clamping force, deformation or damage to the leaf spring due to excessive clamping force can be avoided, while insufficient clamping force can also prevent insecure clamping. The pressure sensor can provide high-precision pressure feedback, enabling the clamping device to automatically adjust the clamping force according to the actual force on the leaf spring. This high-precision feedback mechanism can significantly improve the stability and reliability of clamping, ensuring the clamping accuracy of the leaf spring during processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the clamping assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the clamping component structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the support and adjustment component structure of this utility model.

[0023] In the diagram: 1. Main body; 101. Base plate; 102. Threaded support rod; 103. First nut; 104. Second nut; 105. Foot; 106. Lower clamping plate; 107. Lower soft pad; 108. Machining base; 109. Machining end; 2. Clamping assembly; 201. Vertical plate; 202. Top plate; 203. Variable frequency motor; 204. Lead screw; 205. Threaded block; 206. Bearing; 207. Slide rail; 208. Connecting plate; 209. Slider; 210. Upper clamping plate; 211. Upper soft pad; 212. Pressure sensor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to 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.

[0025] For examples, please refer to Figures 1-4 This utility model provides a technical solution:

[0026] A special fixture for machining lug holes of automotive leaf springs includes a main body 1, and a clamping assembly 2 is fixedly connected to the top of the main body 1.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the main body 1 includes a base plate 101, a lower clamping plate 106 is fixedly connected to the top of the base plate 101, and a lower soft pad 107 is fixedly connected to the top of the lower clamping plate 106. The clamping assembly 2 includes a vertical plate 201, a top plate 202 is fixedly connected to the side of the vertical plate 201, a variable frequency motor 203 is mounted on the top of the top plate 202, a lead screw 204 is fixedly connected to the output end of the variable frequency motor 203, a threaded block 205 is threadedly connected to the bottom of the lead screw 204, and a connecting plate is fixedly connected to the side of the threaded block 205. 208. An upper clamping plate 210 is fixedly connected to the side of the connecting plate 208. An upper soft pad 211 is fixedly connected to the bottom of the upper clamping plate 210. The threaded block 205 is driven by the variable frequency motor 203 to move up and down on the lead screw 204, thereby controlling the raising and lowering of the upper clamping plate 210. This allows the upper clamping plate 210 and the lower clamping plate 106 to clamp the automotive leaf spring. By precisely controlling the speed and angle of the motor, the threaded block 205 can be raised and lowered precisely, thus achieving high-precision clamping.

[0028] The upper clamping plate 210 has a pressure sensor 212 fixedly connected to its side, the vertical plate 201 has a slide rail 207 fixedly connected to its side, the slide rail 207 has a slider 209 slidably connected to its side, the slider 209 is fixedly connected to the connecting plate 208, the bottom of the base plate 101 has a bearing 206 fixedly connected to its bottom, the lead screw 204 extends into the bearing 206, the top of the base plate 101 has a machining base 108 installed, and the machining end 109 is installed inside the machining base 108. The pressure sensor 212 can monitor the clamping force applied to the leaf spring by the clamping device in real time to ensure that the clamping force is within a safe range. By precisely controlling the clamping force, the deformation or damage of the leaf spring due to excessive clamping force can be avoided, and the clamping insecure clamping due to insufficient clamping force can also be prevented. The pressure sensor 212 can provide high-precision pressure feedback.

[0029] In this embodiment, as Figure 1 and Figure 4 As shown, a threaded support rod 102 is provided inside the base plate 101. A first nut 103 is threadedly connected to the bottom of the threaded support rod 102. There are four threaded support rods 102 and four first nuts 103. The first nuts 103 are located at the top of the base plate 101. A second nut 104 is threadedly connected to the bottom of the threaded support rod 102. There are four second nuts 104. The bottom of the threaded support rod 102 is fixedly connected to four feet 105. The adjustable equipment support mechanism composed of the threaded support rod 102, the first nuts 103, the second nuts 104 and the feet 105 can adjust the equipment to the supported height position and has stable support capability.

[0030] The working process of this utility model is as follows: When using the special fixture for machining the lug hole of an automotive leaf spring designed in this solution, the automotive leaf spring is first placed between the lower clamping plate 106 and the upper clamping plate 210. Then, the threaded block 205 is driven by the variable frequency motor 203 to move up and down on the lead screw 204, thereby controlling the raising and lowering of the upper clamping plate 210. This allows the upper clamping plate 210 and the lower clamping plate 106 to clamp the automotive leaf spring. The machining base 108 and the machining end 109 can then be used to perform specified machining on the automotive leaf spring. The pressure sensor 212 can provide high-precision pressure feedback, enabling the clamping device to automatically adjust the clamping force according to the actual force on the leaf spring. This high-precision feedback mechanism can significantly improve the stability and reliability of the clamping.

[0031] 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 special fixture for machining of the hole of the hanger of the automobile steel plate spring, comprising a main body (1), characterized in that: The top of the main body (1) is fixedly connected to a clamping assembly (2); The main body (1) includes a base plate (101), a lower clamping plate (106) is fixedly connected to the top of the base plate (101), and a lower soft pad (107) is fixedly connected to the top of the lower clamping plate (106). The clamping assembly (2) includes a vertical plate (201), a top plate (202) is fixedly connected to the side of the vertical plate (201), a variable frequency motor (203) is installed on the top of the top plate (202), a lead screw (204) is fixedly connected to the output end of the variable frequency motor (203), a threaded block (205) is threadedly connected to the bottom of the lead screw (204), a connecting plate (208) is fixedly connected to the side of the threaded block (205), an upper clamping plate (210) is fixedly connected to the side of the connecting plate (208), and an upper soft pad (211) is fixedly connected to the bottom of the upper clamping plate (210).

2. The special fixture for machining the eye hole of the automobile steel plate spring hanger according to claim 1, characterized in that, A pressure sensor (212) is fixedly connected to the side of the upper clamping plate (210), a slide rail (207) is fixedly connected to the side of the vertical plate (201), a slider (209) is slidably connected to the side of the slide rail (207), and the slider (209) is fixedly connected to the connecting plate (208).

3. The special fixture for machining the eye hole of the automobile steel plate spring hanger according to claim 1, characterized in that, The bottom of the base plate (101) is fixedly connected to a bearing (206), and the lead screw (204) extends into the interior of the bearing (206).

4. The special fixture for machining the eye hole of the automobile steel plate spring hanger according to claim 1, characterized in that, A processing base (108) is installed on the top of the base plate (101), and a processing end (109) is installed inside the processing base (108).

5. The special fixture for machining the eyelet of an automobile steel plate spring hanger according to claim 1, characterized in that, The base plate (101) is provided with a threaded support rod (102) inside, and the bottom of the threaded support rod (102) is threadedly connected to a first nut (103).

6. The special fixture for machining the eye hole of the automobile steel plate spring hanger according to claim 5, characterized in that, Four threaded support rods (102) and first nuts (103) are provided, with the first nuts (103) located on the top of the base plate (101).

7. A special fixture for machining lug holes in automotive leaf springs according to claim 6, characterized in that, The bottom of the threaded support rod (102) is threadedly connected to a second nut (104), and four second nuts (104) are provided. The second nuts (104) are located at the bottom of the base plate (101).

8. The special fixture for machining the eyelet of an automobile steel plate spring hanger according to claim 7, characterized in that, The bottom of the threaded support rod (102) is fixedly connected to a foot (105), and four feet (105) are provided.

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