Shock absorber bottom cover press fitting tool

Abstract

The utility model discloses a shock absorber bottom cover press -fitting frock for controlling bottom cover position and steel pipe cooperation when shock absorber outer tube assembly part makes, ensures follow -up processing stability and guarantees size, include: positioning assembly, can move through drive mechanism I before and after, including locating plate and the profiling female die for positioning bottom cover, and the profiling female die is located below the locating plate, and the middle part of locating plate is equipped with the positioning hole for the steel pipe of passing and setting, lower pressure assembly, is located above positioning assembly, can drive steel pipe and move to bottom cover place assembly along the axial lower pressure. Thus, need not to rely on the hand fixed steel pipe and bottom cover, has improved the security greatly, improved production efficiency and product pass rate, and can guarantee in bottom cover press -fitting process, and bottom cover position is relatively stable, guarantees the assembly area jump of finished product piece bottom cover and satisfies the requirement, avoids the influence follow -up assembly. Simultaneously reduces bottom cover pressure and is not bad rate, avoids causing raw material waste.

Description

Technical Field

[0001] This utility model relates to the technical field of vibration damper processing equipment, and in particular to a vibration damper bottom cover press-fitting fixture. Background Technology

[0002] Automotive shock absorbers generally consist of an outer cylinder (steel tube) and a bottom cover, such as... Figure 1 As shown, the bottom cover is installed at one end of the outer cylinder. The bottom cover is an important component of the shock absorber. The bottom cover is assembled to the end of the outer cylinder by press fitting. Currently, the bottom cover press fitting is performed by pressing the bottom cover in using a pressure testing machine or hydraulic press. First, the bottom cover and steel pipe are positioned using a guide sleeve. A mandrel is used to limit the position inside the steel pipe. The bottom cover is placed on the steel pipe and pressed in using a conforming pressure block. The bottom cover is pressed in until the inner end face of the bottom cover is completely in contact with the position of the limiting mandrel inside the steel pipe, so as to achieve the bottom cover press fitting and meet the distance dimension of 350.3±0.3 required by the drawing.

[0003] However, this method requires manual fixation of the steel pipe and the bottom cover, which is inefficient and poses certain safety hazards. In addition, the finished product generally requires the inner φ35 circle of the bottom cover to have a runout of less than 0.3 mm, and the outer plane of the bottom cover also has a verticality requirement. This requires that the bottom cover cannot be tilted or deviated during press-fitting. After press-fitting, it cannot meet the requirements on the drawing, and the positioning is invalid. Therefore, the position of the steel pipe and the bottom cover needs to be fixed before press-fitting. However, due to the interference fit, the bottom cover cannot be correctly and evenly placed into the steel pipe by hand. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a shock absorber bottom cover press-fitting fixture.

[0005] This utility model proposes a shock absorber bottom cover press-fitting fixture, used to control the position of the bottom cover and its fit with the steel pipe during the manufacturing process of the shock absorber outer cylinder assembly, including:

[0006] The positioning assembly is capable of moving back and forth via the drive mechanism I, and includes a positioning plate and a contouring die for positioning the bottom cover. The contouring die is located below the positioning plate, and the positioning plate has a positioning hole in the middle for inserting the steel pipe.

[0007] The pressing assembly, located above the positioning assembly, is capable of driving the steel pipe to move axially downwards to the bottom cover for assembly. The pressing assembly includes a pressing plate and a press for driving the pressing plate to rise and fall. A mandrel is fixed to the lower end of the pressing plate. The steel pipe passes through the positioning hole and abuts against the upper end of the contour die. When pressing down, the mandrel can extend into the steel pipe.

[0008] Preferably, it also includes a base plate, on which two slide rails extend in the front-to-back direction. A sliding plate is fixed to the lower end of the contour die, and the sliding plate is slidably connected to the slide rails. The driving mechanism I is a cylinder.

[0009] Preferably, the upper end of the base plate is fixed with a plurality of guide rods that are slidably connected to the lower pressure plate. The lower pressure plate can slide up and down along the guide rods. The lower pressure plate is provided with a plurality of guide holes corresponding to the plurality of guide rods. A guide cylinder is also installed in the guide hole, and the guide rod extends into the guide cylinder.

[0010] Preferably, a fixing plate is fixed to the end of the guide rod extending above the lower pressure plate, the press is fixed to the upper end of the fixing plate, a through hole is opened in the middle of the fixing plate, and the output end of the press passes through the through hole and presses against the upper end of the lower pressure plate.

[0011] Preferably, the molded die is further provided with an outer diameter control ring located outside the bottom cover. The height of the outer diameter control ring is higher than that of the bottom cover, and the inner diameter of the outer diameter control ring is basically equal to the outer diameter of the bottom cover and the outer diameter is equal to the inner diameter of the steel pipe.

[0012] Preferably, a contact displacement sensor is installed at the lower end of the sliding plate, and the distance the steel pipe is pressed down is equal to the distance the outer diameter control ring moves.

[0013] Preferably, an elastic element is connected to the lower end of the outer diameter control ring inside the contour die, and the elastic element can drive the outer diameter control ring to reset after being pressed down.

[0014] Preferably, a weighing sensor is provided on the lower pressure plate.

[0015] Preferably, the lower end of the mandrel is equipped with a detachable pressing head. The outer diameter of the detachable pressing head is smaller than the inner diameter of the steel pipe, and its lower end is provided with a protrusion with a diameter of φ35 for cooperating with the bottom cover for positioning and simultaneously fixing the steel pipe and the bottom cover.

[0016] In summary, this utility model has the following beneficial effects: The equipment first positions the bottom cover within the contour die, inserts a steel pipe, and fixes the steel pipe with positioning holes. The driving mechanism I and the slide rail drive the positioning assembly to the press. The press is then started, causing the lower pressure plate to press down. The lower pressure plate moves the mandrel downwards, extending it into the steel pipe and providing support. During the downward movement of the lower pressure plate, its lower end contacts the upper end of the steel pipe, continuing to press the steel pipe until it is pressed together with the bottom cover. This eliminates the need for manual fixing of the steel pipe and bottom cover, greatly improving safety. It also increases production efficiency and product qualification rate. Furthermore, the pre-defined positions of the positioning assembly and the pressing assembly prevent problems caused by dimensional inaccuracies during pressing. Before pressing, the end of the steel pipe contacts the bottom cover, which is positioned within the contour die. The contour die and the outer diameter control ring limit the movement, preventing the bottom cover from being pressed out of shape and excessive runout after pressing.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the assembly process of the bottom cover and the steel pipe.

[0019] Figure 2 This is a structural diagram of the shock absorber bottom cover press-fitting fixture according to an embodiment of the present utility model;

[0020] Figure 3 This is a perspective view of the lower half of the shock absorber bottom cover press-fitting fixture according to an embodiment of the present utility model;

[0021] Figure 4 This is a front view of the lower half of the shock absorber bottom cover press-fitting fixture according to an embodiment of the present utility model;

[0022] Figure 5 This is a partial structural diagram of the positioning assembly according to an embodiment of the present utility model;

[0023] Figure 6 This is a partial structural perspective view of the positioning assembly according to an embodiment of the present utility model;

[0024] Figure 7 This is a partial cross-sectional view of the lower pressure plate and mandrel assembly in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Bottom cover; 2. Steel pipe;

[0027] 3. Positioning plate; 31. Positioning sleeve;

[0028] 4. Contouring die; 41. Outer diameter control ring; 42. Sliding plate; 421. Contact displacement sensor; 43. Spring;

[0029] 5. Lower pressure plate; 51. Weighing sensor;

[0030] 6. Press;

[0031] 7. Mandrel; 71. Detachable press-fit head; 711. Protrusion with a diameter of φ35; 72. Mounting plate;

[0032] 8. Base plate; 81. Slide rail; 82. Guide rod; 83. Guide cylinder;

[0033] 9. Fixing plate. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figure 2-7 As shown in this embodiment, a shock absorber bottom cover press-fit fixture is proposed for fitting the steel pipe and bottom cover of the shock absorber outer cylinder component, ensuring the stability of subsequent processing and guaranteeing dimensions, including:

[0036] The positioning assembly, which can move back and forth via the drive mechanism I, includes a positioning plate 3 and a contour die 4 for positioning the bottom cover 1. The contour die 4 is located below the positioning plate 3. The positioning plate 3 has a positioning hole in the middle for inserting the steel pipe 2. Specifically, the positioning hole is also equipped with a positioning sleeve 31. The positioning sleeve 31 includes a large-diameter cylinder and a small-diameter cylinder with an integral structure. The small-diameter cylinder is located inside the positioning hole, and the large-diameter cylinder is located at the upper end of the positioning hole.

[0037] The pressing assembly, located above the positioning assembly, drives the steel pipe 2 to move axially downwards to the bottom cover 1 for assembly. The pressing assembly includes a pressing plate 5 and a press 6 for driving the pressing plate 5 to rise and fall. A mandrel 7 is fixed to the lower end of the pressing plate 5. The steel pipe 2 passes through the positioning hole and abuts against the upper end of the contour die 4. During pressing, the mandrel 7 can extend into the steel pipe 2, providing support and preventing deformation of the steel pipe 2 during the pressing process. The upper end of the contour die 4 serves to limit the movement of the steel pipe 2.

[0038] Specifically, a detachable pressing head 71 is installed at the lower end of the mandrel 7. The outer diameter of the detachable pressing head 71 is slightly smaller than the inner diameter of the steel pipe 2, and its lower end has a protrusion 711 with a diameter of φ35 for matching the bottom cover 1 for positioning and simultaneously fixing the steel pipe 2 and the bottom cover 1. The tooling can be quickly changed by replacing the pressing head. The length of the mandrel 7 is equal to the distance from the protrusion 711 with a diameter of φ35 after pressing the bottom cover 1 to the end face, and it does not contact the bottom cover 1 during pressing.

[0039] During the pressing process, the position of the bottom cover 1 remains fixed, and the pressing assembly presses down on the upper end face of the steel pipe 2 until the bottom cover 1 is pressed into the steel pipe 2.

[0040] Thus, the equipment first positions the bottom cover within the contour die 4, inserts the steel pipe 2, and fixes the steel pipe 2 with positioning holes. The positioning assembly is then driven by the drive mechanism I and the slide rail 81 to the press 6. The press 6 is then activated, causing the lower pressure plate 5 to press down. The lower pressure plate 5 moves the mandrel 7 downwards, extending it into the steel pipe 2 to provide support. As the lower pressure plate 5 moves downwards, its lower end contacts the upper surface of the steel pipe 2, continuing to press down until the steel pipe 2 and the bottom cover 1 are pressed together. This eliminates the need for manual fixing of the steel pipe 2 and the bottom cover 1, significantly improving safety. It also increases production efficiency and product qualification rate. Furthermore, the pre-defined positions of the positioning assembly and the pressing assembly prevent problems caused by dimensional inaccuracies during pressing. Before pressing, the end of the steel pipe contacts the bottom cover, which is positioned within the contour die 4. The contour die 4 and the outer diameter control ring 41 limit the movement, preventing the bottom cover from being pressed out of place or excessive runout after pressing.

[0041] Furthermore, it also includes a base plate 8, on which two slide rails 81 extend in the front-to-back direction. A sliding plate 42 is fixed to the lower end of the contour die 4, and the sliding plate 42 is slidably connected to the slide rails 81 (a slider may be provided at the lower end of the sliding plate 42, and the slider slides along the slide rails 81). The drive mechanism I is a cylinder. In this way, the cylinder controls the front-to-back movement of the contour die 4, which facilitates the loading and unloading of the bottom cover 1 and the steel pipe 2, avoiding interference problems during loading and unloading. When it is necessary to load the steel pipe 2, the cylinder first drives the sliding plate 42 forward, and then after the steel pipe 2 is loaded, the cylinder drives the sliding plate 42 to return to its original position.

[0042] Furthermore, such as Figure 1 As shown, the upper end of the base plate 8 is fixed with multiple guide rods 82 that are slidably connected to the lower pressure plate 5. The lower pressure plate 5 can slide up and down along the guide rods 82. The lower pressure plate 5 has multiple guide holes that correspond to the multiple guide rods 82 respectively. A guide cylinder 83 is also installed in the guide hole, and the guide rod 82 extends into the guide cylinder 83.

[0043] A fixing plate 9 is fixed to the end of the guide rod 82 extending above the lower pressure plate 5. The press 6 is fixed to the upper end of the fixing plate 9. A through hole is opened in the middle of the fixing plate 9, and the output end of the press 6 passes through the through hole and presses against the upper end of the lower pressure plate 5. After the bottom cover 1 and the steel pipe 2 are placed, the press 6 is started, which drives the lower pressure plate 5 to move downward along the guide rod 82. The setting of the guide rod 82 and the guide cylinder 83 makes the downward pressing movement of the lower pressure plate 5 more stable and improves the pass rate of pressing.

[0044] The lower pressure plate 5 is equipped with a weighing sensor 51. If the steel pipe 2 is too short, the protrusion 711 with a diameter of φ35 at the lower end of the mandrel 7 will contact the bottom cover 1 in advance. After the pressure is reached, the weighing sensor 51 reads the position parameter and transmits the signal to the controller, which can automatically determine that it is unqualified. Then, the steel pipe 2 that meets the length requirements can be replaced according to the prompt.

[0045] In this embodiment, as Figure 4 As shown, the contour die 4 is also provided with an outer diameter control ring 41 located outside the bottom cover 1. The height of the outer diameter control ring 41 is higher than that of the bottom cover 1, and the basic inner diameter of the outer diameter control ring 41 is equal to the outer diameter of the bottom cover 1 (positive tolerance, clearance fit) and the outer diameter is equal to the inner diameter of the steel pipe 2 (positive tolerance).

[0046] Meanwhile, a contact displacement sensor 421 is installed at the lower end of the sliding plate 42. The distance the steel pipe 2 is pressed down is equal to the distance the outer diameter control ring 41 moves. The outer diameter control ring 41 moves the same distance as the steel pipe 2 is pressed down, and at the same time, the outer diameter control ring 41 can also lock the bottom cover 1.

[0047] It should be noted that an elastic element is connected to the lower end of the outer diameter control ring 41 inside the contour die 4. The elastic element can drive the outer diameter control ring 41 to return to its original position after being pressed down. Specifically, the elastic element can be a spring 43.

[0048] Through the limiting effect of the upper end of the contour die 4 on the steel pipe 2 and the cooperation of the contact displacement sensor 421, the pressing assembly presses the steel pipe 2 and the bottom cover 1 together. It also has two error prevention functions: (1) When the specifications of the raw material (steel pipe 2 or cover) do not match the specifications in this embodiment, it cannot be put into the pressing assembly; (2) When the length of the steel pipe 2 is not good (too long or too short), the contact displacement sensor 421 will transmit the signal to the controller of the tooling during the pressing process (for ease of operation and control, the tooling is equipped with a controller for controlling each component, which is existing technology and will not be repeated here) and automatically alarm. Specifically, if the steel pipe 2 is too long, the lower limiting sensor will judge it as unqualified during the pressing process; if the steel pipe 2 is too short, the protrusion 711 with a diameter of φ35 at the lower end of the mandrel 7 will contact the bottom cover 1 in advance, and the upper weighing sensor 51 will judge it as unqualified. Just replace the steel pipe 2 with one that meets the length requirements according to the prompt.

[0049] In use, first, start the cylinder to drive the sliding plate 42 to move forward along the slide rail 81. Then, place the bottom cover 1 into the contour die 4. Insert the steel pipe 2 from above the positioning sleeve 31 on the positioning plate 3 until its lower end abuts against the bottom cover 1. Start the cylinder again to drive the sliding plate 42 back to below the press 6. Then, start the press 6. The output end of the press 6 drives the lower pressure plate 5 to move down, which in turn drives the mandrel 7 to move down and extend into the steel pipe 2 for support. Continue pressing down until the mounting plate 72 at the lower end of the lower pressure plate 5 contacts the upper end of the steel pipe 2 and continues pressing down. The lower end of the steel pipe 2 contacts the outer diameter control ring 41 and moves down until the bottom cover 1 is pressed into the steel pipe 2. The press 6 stops. Start the press 6 again to drive the lower pressure plate 5 and mandrel 7 to rise. At this time, the spring 43 drives the outer diameter control ring 41 to reset. Remove the pressed bottom cover 1 and steel pipe 2. The structure is simple and the pressing is convenient. There is no need for manual fixing of the steel pipe 2 and the bottom cover 1, which improves safety, pressing quality and work efficiency.

[0050] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shock absorber bottom cover press-fitting fixture, used to control the position of the bottom cover and its fit with the steel pipe during the manufacturing of the shock absorber outer cylinder assembly, characterized in that, include: The positioning assembly is capable of moving back and forth via the drive mechanism I, and includes a positioning plate and a contouring die for positioning the bottom cover. The contouring die is located below the positioning plate, and the positioning plate has a positioning hole in the middle for inserting the steel pipe. The pressing assembly, located above the positioning assembly, is capable of driving the steel pipe to move axially downwards to the bottom cover for assembly. The pressing assembly includes a pressing plate and a press for driving the pressing plate to rise and fall. A mandrel is fixed to the lower end of the pressing plate. The steel pipe passes through the positioning hole and abuts against the upper end of the contour die. When pressing down, the mandrel can extend into the steel pipe.

2. The damper bottom cover press-fitting fixture according to claim 1, characterized in that, It also includes a base plate, on which two slide rails extend in the front-to-back direction. A sliding plate is fixed to the lower end of the contour die, and the sliding plate is slidably connected to the slide rails. The driving mechanism I is a cylinder.

3. The damper bottom cover press-fitting fixture according to claim 2, characterized in that, The upper end of the base plate is fixed with multiple guide rods that are slidably connected to the lower pressure plate. The lower pressure plate can slide up and down along the guide rods. The lower pressure plate has multiple guide holes that correspond to the multiple guide rods respectively. A guide cylinder is also installed in the guide hole, and the guide rod extends into the guide cylinder.

4. The damper bottom cover press-fitting fixture according to claim 3, characterized in that, The guide rod extends above the lower pressure plate and is fixed to a fixing plate. The press is fixed to the upper end of the fixing plate. A through hole is opened in the middle of the fixing plate. The output end of the press passes through the through hole and presses against the upper end of the lower pressure plate.

5. The damper bottom cover press-fitting fixture according to claim 2, characterized in that, The molded die is also provided with an outer diameter control ring located outside the bottom cover. The height of the outer diameter control ring is higher than that of the bottom cover, and the inner diameter of the outer diameter control ring is basically equal to the outer diameter of the bottom cover and the outer diameter is equal to the inner diameter of the steel pipe.

6. The damper bottom cover press-fitting fixture according to claim 5, characterized in that, A contact displacement sensor is installed at the lower end of the sliding plate, and the distance the steel pipe is pressed down is equal to the distance the outer diameter control ring moves.

7. The damper bottom cover press-fitting fixture according to claim 6, characterized in that, An elastic element is connected to the lower end of the outer diameter control ring inside the contour die. The elastic element can drive the outer diameter control ring to reset after being pressed down.

8. The damper bottom cover press-fitting fixture according to claim 1, characterized in that, The lower pressure plate is equipped with a weighing sensor.

9. The damper bottom cover press-fitting fixture according to claim 1, characterized in that, The lower end of the mandrel is equipped with a detachable pressing head. The outer diameter of the detachable pressing head is smaller than the inner diameter of the steel pipe, and its lower end is provided with a protrusion with a diameter of φ35 to cooperate with the bottom cover for positioning and to fix the steel pipe and the bottom cover.

Images