Pull rod structure for improving universality of reducing clamp

Abstract

The utility model belongs to the field of novel product structures of automobile parts, and discloses a pull rod structure for increasing the universality of a reducing clamp, which is matched with a reducing machine for use, the reducing machine is provided with a thrust rod capable of moving up and down, and the lower position of the thrust rod is provided with a pull rod structure for installing and limiting the displacement of a bushing. The lining is limited to a hole shrinkage station of a hole shrinkage machine; the pull rod structure comprises a connecting rod which is fixedly connected with the thrust rod and vertically and downwards points to a reducing station of the reducing machine, the bush is arranged on the periphery of the connecting rod in a sleeving mode, and the lower end of the connecting rod is connected with a limiting pressing head capable of being horizontally compressed and used for limiting displacement of the bush. By means of the T-shaped structure of the pull rod, displacement of the lining can be limited, the vertical position of the lining can be controlled, a step limiting structure can be removed through hole shrinkage clamp machining, and the outer diameter height universality of the hole shrinkage clamp is improved.

Description

Technical Field

[0001] This utility model belongs to the field of new product structures for automotive parts, and relates to a tie rod structure that increases the versatility of diameter reduction clamps. Background Technology

[0002] With the rapid development of the automotive industry, the performance requirements for automotive parts are becoming increasingly stringent, especially for key components such as bushings, which need to meet stiffness requirements under stress in different directions. Currently, the trend towards platformization in automotive manufacturing is significant, and automakers generally require higher versatility in parts to reduce costs and shorten development cycles. However, traditional reduction-diameter fixtures are mostly dedicated designs, and their sidewalls typically feature stepped structures to achieve height positioning of the bushing's outer tube. This results in bushings of different heights but similar inner diameters not being able to share the same fixture. This design presents the following problems:

[0003] 1. Poor versatility: Bushings of different heights require separate fixture designs, increasing development costs and time;

[0004] 2. Complex process: The steps on the side wall of the fixture require precision machining, which is a difficult process;

[0005] 3. Waste of resources: The inability to reuse fixtures leads to low equipment utilization. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model proposes a pull rod structure that increases the versatility of the diameter reduction fixture. By simplifying the fixture design and removing the side wall steps, the versatility and production efficiency of the diameter reduction fixture are significantly improved.

[0007] This utility model is achieved through the following technical solution: a pull rod structure that increases the versatility of the reducing fixture, used in conjunction with a reducing machine, wherein a push rod that can move up and down is installed on the reducing machine, and a pull rod structure for installing a bushing is installed at a lower position on the push rod, thereby restricting the bushing to the reducing station of the reducing machine.

[0008] The tie rod structure includes a vertically downward connecting rod fixedly connected to the thrust rod and pointing towards the reducing station of the reducing machine. A bushing is fitted around the outer periphery of the connecting rod, and a horizontally compressible limiting pressure head is connected to the lower end of the connecting rod to limit the downward displacement of the bushing.

[0009] According to this utility model, the connecting rod is further provided with a sliding tube on its outer periphery. The axis of the sliding tube is perpendicular to the axis of the connecting rod and is symmetrical about the axis of the connecting rod. Both ends of the sliding tube extend radially away from the center of the sliding tube. The sliding tube has two independent cavities inside, and each cavity is equipped with a horizontally compressible limiting pressure head.

[0010] According to this utility model, the horizontally compressible limiting pressure head includes a pressure head disposed in the cavity of the sliding tube, the pressure head extending away from the center of the sliding tube, and the pressure head being connected to the inner wall of the corresponding cavity of the sliding tube by a pressure head spring, the extension and retraction direction of the pressure head spring being away from or close to the center of the sliding tube.

[0011] According to this utility model, the pull rod structure further includes a pin for fixed connection of the push rod, the pin being perpendicular to the outer circumferential surface of the push rod and extending into the interior of the push rod, the top of the connecting rod being fixedly connected to the end of the pin located inside the push rod, and the bottom of the connecting rod extending vertically downward.

[0012] According to this utility model, the pressure head is further provided with a vertically arranged steel ball reset assembly inside, and correspondingly, slots are provided at both ends of the sliding tube. During the extension and retraction of the pressure head, the steel ball reset assembly is embedded in the reset slot to realize the horizontal reset of the pressure head.

[0013] According to this utility model, the steel ball reset assembly further includes a vertically arranged steel ball spring, with the two ends of the steel ball spring extending to the upper and lower surfaces corresponding to the pressure head. Steel balls are fixedly connected to the upper and lower ends of the steel ball spring, and the slots at both ends of the sliding tube are used to accommodate the steel balls. After the pressure head extends and retracts, the steel balls return to the slots, thereby resetting the pressure head.

[0014] According to this utility model, the depth of the slot is less than the radius of the steel ball.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. High versatility: The tie rod structure works in conjunction with the push rod, eliminating the side wall steps of the original diameter reduction tool, and adapting to bushings of different heights and inner diameters. One set of diameter reduction fixtures can meet the needs of multiple bushings.

[0017] 2. Simplified process: No need to process complex stepped structures, reducing the manufacturing cost and process difficulty of diameter reduction fixtures;

[0018] 3. Precise control: The pin and connecting rod work together to ensure stable and reliable bushing positioning and diameter reduction process;

[0019] 4. Precise reset: The ball spring assembly prevents the pressure head from shifting and ensures that the pressure head returns to its initial position, allowing for precise reset and facilitating reuse. Attached Figure Description

[0020] Figure 1a A schematic diagram showing the usage state of the tie rod structure of this utility model, which increases the versatility of the diameter reduction clamp.

[0021] Figure 1b for Figure 1a A magnified view of a portion of the image;

[0022] Figure 2 This is a schematic diagram of the connection structure between the pull rod structure, the thrust rod, and the bushing of this utility model;

[0023] Figure 3 This is a schematic diagram of the tie rod structure of this utility model.

[0024] Among them, 1-reducing machine; 2-thrust rod; 3-tie rod structure; 3-1 pin; 3-2 connecting rod; 3-3 sliding tube; 3-4 pressure head spring; 3-5 pressure head; 3-6 steel ball; 3-7 steel ball spring; 4- bushing. Detailed Implementation

[0025] To facilitate understanding of the utility model's objectives and effects, the specific embodiments of the utility model are as follows, in conjunction with the accompanying drawings:

[0026] like Figure 1a and Figure 1b As shown, a schematic diagram and a partially enlarged schematic diagram of a tie rod structure for increasing the versatility of a reducing fixture are provided. When used in conjunction with a reducing machine 1, the reducing machine 1 is equipped with a cylindrical thrust rod 2 that can move up and down. A tie rod structure for installing and limiting the vertical displacement of the bushing 4 is installed slightly below the thrust rod 2, thus confining the bushing 4 to the reducing position of the reducing machine 1. By adjusting the stroke of the thrust rod 2, the position of the bushing 4 relative to the reducing position of the reducing machine 1 is adjusted, ensuring they correspond and improving reducing efficiency.

[0027] Specifically, the tie rod structure includes a pin 3-1 fixedly connected to the thrust rod 2 and a connecting rod 3-2, one end of which is fixedly connected to the pin 3-1 and points vertically downward toward the reducing station of the reducing machine 1. A bushing 4 is fitted around the outer periphery of the connecting rod 3-2, corresponding to the reducing station. Preferably, the pin 3-1 is perpendicular to the outer peripheral surface of the thrust rod 2 and extends into the interior of the thrust rod 2, and the top of the connecting rod 3-2 is fixedly connected to the end of the pin 3-1 located inside the thrust rod 2.

[0028] like Figure 2The diagram shows a schematic of the connection structure between the tie rod, the thrust rod, and the bushing. In this embodiment, to prevent the bushing 4 from moving up and down around the outer periphery of the connecting rod 3-2, a sliding tube 3-3, coaxially arranged with the connecting rod 3-2, is connected at a lower position. The sliding tube 3-3 extends radially outwards symmetrically about the axis of the connecting rod 3-2. Inside the sliding tube 3-3, two independent cavities symmetrical about its axis are formed. Each cavity is equipped with a pressure head 3-5, which extends away from the axis of the sliding tube 3-3. The pressure head 3-5 limits the bottom position of the bushing 4, preventing it from slipping off the lower end of the connecting rod 3-2. The sliding tube 3-3 is fitted around the outer periphery of the connecting rod 3-2. The height of the sliding tube 3-3 can be adjusted according to the height of the bushing 4, thereby adjusting the height of the pressure head 3-5 and limiting the bottom position of the bushing 4. The pressure head 3-5 and the connecting rod 3-2 together form a T-shaped tie rod, replacing the traditional stepped limiting structure and reducing the processing difficulty of the diameter reduction station.

[0029] The pressure head 3-5 is connected to the inner wall of the corresponding cavity of the sliding tube 3-3 by a pressure head spring 3-4. The extension and retraction direction of the pressure head spring 3-4 is towards or away from the axis of the sliding tube 3-3. The pressure head 3-5 can extend and retract accordingly according to the extension and retraction of the diameter reduction station, improving its adaptability and adapting to diameter reduction operations of multiple sizes. After the diameter reduction operation is completed, it can automatically spring back to prepare for the next diameter reduction operation.

[0030] like Figure 3 The diagram shows a schematic of the pull rod structure. In this embodiment, to improve the accuracy of the springback reset of the pressure head 3-5, a vertically arranged steel ball spring 3-7 is provided inside the pressure head 3-5, extending from both ends onto the upper and lower surfaces corresponding to the pressure head 3-5. Steel balls 3-6 are fixedly connected to the upper and lower ends of the steel ball spring 3-7, respectively. Correspondingly, slots for accommodating the steel balls 3-6 are provided at both ends of the sliding tube 3-3. After the pressure head 3-5 extends or retracts, the steel balls 3-6 return to the slots, thus resetting the pressure head 3-5. Preferably, the depth of the slots is less than the radius of the steel balls 3-6. This allows the slots to both position the steel balls 3-6 and, when the pressure head 3-5 is subjected to external force, to disengage the steel balls 3-6 from the slots, achieving compression. The steel ball spring assembly ensures a stable trajectory for the pressure head, enabling precise reset and facilitating continued use.

[0031] The working principle of this utility model is as follows: Before the diameter reduction, the bushing 4 is first installed on the outer periphery of the connecting rod 3-2, and then the horizontally compressible limiting pressure head is installed below the bushing 4. Then the diameter reduction machine is started, and the stroke of the push rod 2 is adjusted according to the height of the bushing 4. The horizontally compressible limiting pressure head and the bushing enter the diameter reduction station in sequence. During the entry process, the horizontally compressible limiting pressure head can be compressed to adapt to the corresponding diameter reduction size, so as to facilitate its passage through the diameter reduction station. Then the bushing 4 moves closer to the diameter reduction station until the bushing 4 corresponds to the diameter reduction station. The downward movement of the push rod 2 stops. At this time, the horizontally compressible limiting pressure head is reset by its own elasticity according to the pressure head spring 3-4, preventing the bushing 4 from sliding down.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this utility model are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model still fall within the scope of the technical solution of this utility model.

Claims

1. A pull rod structure for increasing the versatility of a diameter reduction fixture, used in conjunction with a diameter reduction machine, wherein the diameter reduction machine is equipped with a vertically movable thrust rod, characterized in that, A tie rod structure for installing the bushing is installed at a lower position on the thrust rod, which restricts the bushing at the reducing station of the reducing machine. The tie rod structure includes a vertically downward connecting rod fixedly connected to the thrust rod and pointing towards the reducing station of the reducing machine. A bushing is fitted around the outer periphery of the connecting rod, and a horizontally compressible limiting pressure head is connected to the lower end of the connecting rod to limit the downward displacement of the bushing.

2. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 1, characterized in that, The connecting rod is fitted with a sliding tube on its outer periphery. The axis of the sliding tube is perpendicular to the axis of the connecting rod and is symmetrical about the axis of the connecting rod. Both ends of the sliding tube extend radially away from the center of the sliding tube. The sliding tube has two independent cavities inside, and each cavity is equipped with a horizontally compressible limiting pressure head.

3. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 2, characterized in that, The horizontally compressible limiting pressure head includes a pressure head disposed in the cavity of the sliding tube. The pressure head extends away from the center of the sliding tube, and the pressure head is connected to the inner wall of the corresponding cavity of the sliding tube by a pressure head spring. The extension and retraction direction of the pressure head spring is away from or close to the center of the sliding tube.

4. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 1, characterized in that, The pull rod structure also includes a pin for fixed connection of the push rod. The pin is perpendicular to the outer circumference of the push rod and extends into the inside of the push rod. The top of the connecting rod is fixedly connected to the end of the pin located inside the push rod, and the bottom of the connecting rod extends vertically downward.

5. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 3, characterized in that, The pressure head is equipped with a vertically arranged steel ball reset assembly. Correspondingly, there are slots at both ends of the sliding tube. During the extension and retraction of the pressure head, the steel ball reset assembly is inserted into the reset slots to achieve the horizontal reset of the pressure head.

6. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 5, characterized in that, The steel ball reset assembly includes a vertically arranged steel ball spring, with the upper and lower surfaces of the pressure head extending from both ends of the steel ball spring. Steel balls are fixedly connected to the upper and lower ends of the steel ball spring, and the slots at both ends of the sliding tube are used to accommodate the steel balls. After the pressure head extends or retracts, the steel balls return to the slots, thus resetting the pressure head.

7. The tie rod structure for increasing the versatility of the reduced-diameter clamp as described in claim 6, characterized in that, The depth of the slot is less than the radius of the steel ball.

Images