Nut-like structure press-fitting device

Abstract

The application discloses a nut structure press-fitting device, which comprises a press-fitting assembly and a positioning piece. The press-fitting assembly comprises a supporting frame, a first pressing head, a second pressing head, a top rod assembly and a driving device. The second pressing head is movably arranged in the first pressing head, and the top rod assembly is movably arranged in the first pressing head and above the second pressing head. The driving device is connected with the top rod assembly and can drive the top rod assembly to move up and down. During the driving of the top rod assembly to move downwards, the driving device can drive the first pressing head to move downwards through a linkage assembly, can drive the second pressing head to move downwards through a connecting assembly, and can drive the top rod assembly to continue to move downwards after the first pressing head moves to a preset position and the second pressing head moves to a preset position, so as to push the check ring downwards. The nut structure press-fitting device can more conveniently press-fit the check ring into a guide nut of a brake cylinder or a clamping groove of a gap adjuster, has lower labor intensity and higher installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of basic braking applications in railway locomotives and rolling stock, and particularly to a nut-type press-fitting device. Background Technology

[0002] Currently, there are approximately 3,500 high-speed train sets in operation. New train production has remained stable in recent years, while the number of train sets undergoing maintenance has increased by an average of over 20% annually. As maintenance services continue to expand, customer demands for higher levels of craftsmanship, quality, maintenance cycles, costs, and data-driven approaches in brake caliper unit maintenance are also rising. Currently, the brake caliper unit assembly process suffers from low automation, low precision, high manual labor intensity, and low installation efficiency.

[0003] The brake cylinder assembly consists of two parts: pre-assembly and final assembly. Pre-assembly includes components such as the cylinder body, piston, clearance adjuster, connecting rod, parking cylinder, and manual release mechanism. Final assembly involves sequentially assembling these pre-assembled components to form the brake cylinder. During pre-assembly, the retaining ring needs to be pressed into the grooves of the guide nut and clearance adjuster. In existing technology, the retaining ring is installed manually after the spring seat is pressed out of the groove using a press, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] The purpose of this invention is to provide a nut-type pressing device that can more easily press the retaining ring into the guide nut of the brake cylinder or the slot of the clearance adjuster, with lower labor intensity and higher installation efficiency.

[0005] The objective of this invention is achieved as follows: a nut-type pressing device includes a pressing assembly and a positioning component. The pressing assembly includes a support frame, a cylindrical first pressing head, a second pressing head, a push rod assembly, and a driving device. The first pressing head and the positioning component are arranged vertically at intervals on the support frame. The positioning component is used to center and position the guide nut assembly or clearance adjuster of the brake cylinder. The second pressing head is movable vertically and is located inside the first pressing head and can be used to mount the retaining ring of the brake cylinder. The push rod assembly is movable vertically and is located inside the first pressing head and above the second pressing head. The first pressing head, the second pressing head, the push rod assembly, and the positioning component are coaxially arranged. The driving device is connected to the push rod assembly and can drive the push rod assembly to move vertically. During the downward movement of the push rod assembly, the driving device can drive the first pressing head to move downward together through a linkage component and can drive the second pressing head to move downward together through a connecting component. After the first pressing head and the second pressing head move to a preset position, the driving device can also drive the push rod assembly to continue to move downward to push the retaining ring downward.

[0006] In a preferred embodiment of the present invention, the linkage assembly includes a pressure plate and a buffer spring. The upper end of the first pressure head is fixed to the bottom surface of the pressure plate. The driving end of the driving device is fixed to the top rod assembly through a connecting rod. The connecting rod can move up and down through the pressure plate. The buffer spring is sleeved on the connecting rod and its two ends abut against the limiting part of the connecting rod and the top surface of the pressure plate, respectively.

[0007] In a preferred embodiment of the present invention, a first linear bearing is fixedly installed through the central hole of the pressure plate, and a connecting rod that can move up and down is installed inside the first linear bearing.

[0008] In a preferred embodiment of the present invention, the support frame has vertically arranged guide columns, and the two ends of the pressure plate are sleeved on the guide columns so as to move up and down.

[0009] In a preferred embodiment of the present invention, an annular groove is provided on the outer periphery of the central hole of the pressure plate, and the lower end of the buffer spring abuts against the bottom of the groove.

[0010] In a preferred embodiment of the present invention, the connecting assembly includes a guide plate, a vertical rod, and a horizontal rod. A side through hole is provided on the side wall of the first pressure head. The guide plate passes through the side through hole and is fixedly connected to the connecting rod. The vertical rod is located outside the first pressure head. The upper part of the vertical rod is slidably inserted through the guide plate. A return spring is also sleeved on the vertical rod. The two ends of the return spring abut against the bottom step of the guide plate and the vertical rod, respectively. The lower end of the vertical rod is fixedly connected to one end of the horizontal rod. The other end of the horizontal rod passes through the side through hole and is fixedly connected to the second pressure head. The horizontal rod can abut against the bottom wall of the side through hole.

[0011] In a preferred embodiment of the present invention, a mounting hole is provided on the guide plate, and a second linear bearing is fixedly inserted through the mounting hole. The vertical rod is slidably inserted through the second linear bearing.

[0012] In a preferred embodiment of the present invention, the push rod assembly includes a fixing block fixed to the bottom end of the connecting rod and a plurality of vertical push rods circumferentially spaced and fixed to the bottom surface of the fixing block.

[0013] In a preferred embodiment of the present invention, the positioning element includes a positioning post, and the inner hole of the guide nut in the guide nut assembly can be sleeved on the positioning post; or, the positioning element includes a sleeve with a groove on the top for inserting and placing a gap adjuster.

[0014] In a preferred embodiment of the present invention, the second pressure head includes a conical block and a cylindrical block connected vertically. The outer wall of the conical block is used to fit a retaining ring. The cylindrical block can be inserted into the inner hole of the guide nut or the upper inner hole of the gap adjuster, and the bottom surface of the conical block can abut against the top surface of the guide nut or the gap adjuster.

[0015] As described above, the nut-type pressing device of the present invention is applicable to existing brake caliper unit products of railway locomotives and rolling stock. It can be used for pressing the retaining ring on the guide nut and the retaining ring on the clearance adjuster. Through the cooperation of the drive device, the first pressing head, the second pressing head, and the push rod assembly, the retaining ring can be pressed in one step, eliminating the need for manual installation of the retaining ring into the slot, reducing labor intensity, and ensuring the alignment of the guide nut (clearance adjuster) and the retaining ring, resulting in higher installation efficiency. Attached Figure Description

[0016] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0017] in:

[0018] Figure 1 : This is a schematic diagram of the nut-type structure press-fitting device provided by the present invention.

[0019] Figure 2 : A cross-sectional view of the nut-type structure press-fitting device provided by the present invention.

[0020] Figure 3 :for Figure 2 A magnified view of a portion of the central structure.

[0021] Figure 4 : A partial cross-sectional view of the guide nut assembly provided by the present invention.

[0022] Figure 5 : A front view of the guide nut assembly provided by the present invention installed in a nut-type structure press-fitting device.

[0023] Figure 6 : Another cross-sectional view of the nut-type structure press-fitting device provided by the present invention.

[0024] Figure 7 : A perspective view of the nut-type structure press-fitting device provided by the present invention after installing the gap adjuster.

[0025] Figure 8 : This is a front view of the nut-type structure press-fitting device provided by the present invention after the gap adjuster is installed.

[0026] Explanation of icon numbers:

[0027] 1. Support frame; 11. Guide column;

[0028] 2. First pressure head;

[0029] 3. Second pressure head; 31. Conical block; 32. Cylindrical block;

[0030] 4. Top rod assembly; 41. Fixing block; 42. Vertical top rod;

[0031] 5. Linkage assembly; 51. Pressure plate; 52. Buffer spring; 53. First linear bearing;

[0032] 6. Connecting assembly; 61. Guide plate; 62. Vertical rod; 621. Bottom step; 63. Horizontal rod; 64. Return spring; 65. Second linear bearing;

[0033] 7. Drive unit; 71. Connecting rod; 72. Limiting part;

[0034] 8. Positioning component; 81. Positioning pin;

[0035] 91. Components of the guide nut; 911. Guide nut; 912. Guide tooth seat; 913. Spring seat; 914. Guide spring; 915. Retaining ring;

[0036] 92. Gap adjuster. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] like Figures 1 to 8 As shown, this embodiment provides a nut-type structure press-fitting device, including a press-fitting assembly and a positioning component 8. The press-fitting assembly includes a support frame 1, a cylindrical first press head 2, a second press head 3, a push rod assembly 4, and a driving device 7. The first press head 2 and the positioning component 8 are arranged vertically on the support frame 1 at intervals. The positioning component 8 is used to center and position the guide nut assembly 91 or the gap adjuster 92 of the brake cylinder. The second press head 3 is movable vertically and is arranged inside the first press head 2 and can be used to fit the retaining ring 915 of the brake cylinder. The push rod assembly 4 is movable vertically and is arranged inside the first press head 2 and located above the second press head 3. The first press head 2, the second press head 3, the push rod assembly 4, and the positioning component 8 are coaxially arranged.

[0039] The drive device 7 is connected to the push rod assembly 4 and can drive the push rod assembly 4 to move up and down. During the process of driving the push rod assembly 4 to move down, the drive device 7 can drive the first pressure head 2 to move down together through the linkage assembly 5, and can drive the second pressure head 3 to move down together through the connecting assembly 6. After the first pressure head 2 moves to the preset position and the second pressure head 3 moves to the preset position, the drive device 7 can drive the push rod assembly 4 to continue to move down, so as to push the retaining ring 915 downward.

[0040] The aforementioned nut-type structure pressing device is mainly used to press the retaining ring 915 into the groove of the nut-type structure. Here, the nut-type structure mainly refers to the guide nut assembly 91 of the brake cylinder and the clearance adjuster 92. For example, this pressing device can be used to press the retaining ring 915 into the groove of the guide nut 911, or press the retaining ring 915 into the groove of the clearance adjuster 92. During pressing, the nut-type structure is installed on the positioning member 8, and the retaining ring 915 is fitted onto the second pressing head 3. The driving device 7 drives the push rod assembly 4 to move downwards, causing the first pressing head 2 and the second pressing head 3 to move downwards together. When the first pressing head 2 moves to the preset position, the groove on the nut-type structure is exposed, and the first pressing head 2 no longer moves. After the second pressing head 3 moves to the preset position, the second pressing head 3 no longer moves. The driving device 7 drives the push rod assembly 4 to continue moving downwards, and the push rod assembly 4 pushes the retaining ring 915 downwards, expanding the retaining ring 915 and pushing it into the groove, completing the pressing.

[0041] Therefore, the nut-type structure press-fitting device in this embodiment is suitable for existing brake caliper unit products of railway locomotives and rolling stock. It can be used for press-fitting the retaining ring 915 on the guide nut 911 and the retaining ring 915 on the clearance adjuster 92. Through the cooperation of the drive device 7, the first press head 2, the second press head 3 and the push rod assembly 4, the retaining ring 915 can be press-fitted in one step without the need for manual installation of the retaining ring 915 into the slot, reducing labor intensity and ensuring the alignment of the guide nut 911 (clearance adjuster 92) and the retaining ring 915, resulting in higher installation efficiency.

[0042] In the specific implementation, in order to facilitate the downward movement of the push rod assembly 4 and the first pressure head 2, refer to... Figure 3 The linkage component 5 includes a pressure plate 51 and a buffer spring 52. The upper end of the first pressure head 2 is fixed to the bottom surface of the pressure plate 51. The driving end of the driving device 7 is fixed to the top rod assembly 4 through the connecting rod 71. The connecting rod 71 can move up and down through the pressure plate 51. The buffer spring 52 is sleeved on the connecting rod 71 and its two ends respectively abut against the limiting part 72 of the connecting rod 71 and the top surface of the pressure plate 51.

[0043] A first linear bearing 53 is fixedly installed through the central hole of the pressure plate 51. The connecting rod 71 is installed inside the first linear bearing 53, which can move up and down, so that the first linear bearing 53 can guide and protect the movement of the connecting rod 71. The bottom of the first linear bearing 53 has a mounting ring with an increased diameter. The top of the mounting ring rests against the bottom surface of the pressure plate 51 and is connected to the pressure plate 51 by fasteners (such as bolts).

[0044] To facilitate the guidance of the movement of the pressure plate 51, refer to Figure 1 The support frame 1 has a vertically arranged guide post 11, and the two ends of the pressure plate 51 are sleeved on the guide post 11 and can move up and down.

[0045] To facilitate the limiting of the buffer spring 52, an annular groove is provided on the outer periphery of the central hole of the pressure plate 51, and the lower end of the buffer spring 52 abuts against the bottom of the groove.

[0046] Furthermore, in order to facilitate the downward movement of the push rod assembly 4 and the movement of the second pressure head 3 together, and to enable the push rod assembly 4 to move relative to the second pressure head 3 after the second pressure head 3 has moved to the preset position, refer to Figure 3 The connecting assembly 6 includes a guide plate 61, a vertical rod 62, and a horizontal rod 63. A side through hole is provided on the side wall of the first pressure head 2. The guide plate 61 passes through the side through hole and is fixedly connected to the connecting rod 71. The vertical rod 62 is located outside the first pressure head 2. The upper part of the vertical rod 62 can slide up and down through the guide plate 61. A return spring 64 is also sleeved on the vertical rod 62. The two ends of the return spring 64 abut against the bottom step 621 of the guide plate 61 and the vertical rod 62, respectively. The lower end of the vertical rod 62 is fixedly connected to one end of the horizontal rod 63. The other end of the horizontal rod 63 passes through the side through hole and is fixedly connected to the second pressure head 3. The horizontal rod 63 can abut against the bottom hole wall of the side through hole.

[0047] To prevent excessive wear between the guide plate 61 and the vertical rod 62, a mounting hole is provided on the guide plate 61. A second linear bearing 65 is inserted and fixed through the mounting hole. The vertical rod 62 is slidably inserted into the second linear bearing 65, which provides guidance and protection when the vertical rod 62 moves relative to the guide plate 61. The bottom of the second linear bearing 65 has a mounting ring with an increased diameter. The mounting ring rests against the bottom surface of the guide plate 61 and is connected to the guide plate 61 by fasteners (such as bolts). Specifically, the upper end of the aforementioned return spring 64 rests against the bottom surface of the second linear bearing 65.

[0048] To facilitate the push-stop ring 915 of the push rod assembly 4, refer to Figure 3 The push rod assembly 4 includes a fixing block 41 fixed to the bottom end of the connecting rod 71 and a plurality of vertical push rods 42 circumferentially spaced and fixed to the bottom surface of the fixing block 41.

[0049] The guide nut assembly 91 has an existing structure. It serves two purposes: firstly, it engages with the lead screw of the brake cylinder to transmit braking force; secondly, it engages with the lead screw to adjust the clearance between the caliper and the wheel during vehicle braking. The brake cylinder mentioned in this article is an air brake. (Refer to...) Figure 4The guide nut assembly 91 includes a hollow guide nut 911, a guide tooth seat 912 fixed in the middle of the guide nut 911, an annular spring seat 913 on the end of the guide nut 911, and a guide spring 914 on the outer sleeve of the guide nut 911. The two ends of the guide spring 914 abut against the guide tooth seat 912 and the spring seat 913, respectively. An annular groove is formed on the outer wall of the end of the guide nut 911, and a retaining ring 915 can be engaged in the groove. The retaining ring 915 is an open ring, a metal retaining ring 915, used to axially limit the spring seat 913.

[0050] To facilitate the positioning of the guide nut assembly 91, the positioning element 8 includes a positioning post 81, on which the inner hole of the guide nut 911 in the guide nut assembly 91 can be fitted. The outer diameter of the positioning post 81 matches the inner hole diameter of the guide nut 911 to achieve centering of the guide nut assembly 91.

[0051] The clearance adjuster 92 is an existing structure, and its function is the same as that of the guide nut assembly 91 described above. On the one hand, it is used to cooperate with the lead screw of the brake cylinder to transmit braking force; on the other hand, it is used to cooperate with the lead screw to adjust the clearance between the caliper and the wheel when the vehicle is braking. The upper part of the clearance adjuster 92 has the same structure as the upper part of the guide nut assembly 91 described above. The upper part has a hollow central tube (corresponding to the upper part of the guide nut 911), a spring seat 913 and a spring are sleeved on the central tube, and a groove is opened on the outer wall of the end of the central tube for installing a retaining ring 915 to axially limit the spring seat 913.

[0052] To facilitate the positioning of the gap adjuster 92, refer to... Figure 6 The positioning element 8 includes a sleeve with a groove on the top for inserting and placing the gap adjuster 92.

[0053] The lower part of the gap adjuster 92 differs from that of the guide nut assembly 91, which has a hollow structure. The lower part of the gap adjuster 92, however, is a shaft structure without an inner hole. Therefore, the positioning element 8 adopts a sleeve structure with a groove at the top, allowing the lower part of the gap adjuster 92 to be directly inserted into this groove during use.

[0054] Furthermore, to facilitate the alignment of the retaining ring 915 with the nut-like structure (i.e., the guide nut assembly 91 or the clearance adjuster 92) and to facilitate the fitting of the retaining ring 915, refer to Figure 3 The second pressure head 3 includes a conical block 31 and a cylindrical block 32 connected vertically. The outer wall of the conical block 31 is used to fit the retaining ring 915. The cylindrical block 32 can be inserted into the inner hole of the guide nut 911 or the upper inner hole of the gap adjuster 92, and the bottom surface of the conical block 31 can abut against the top surface of the guide nut 911 or the gap adjuster 92.

[0055] Because the retaining ring 915 is relatively hard, it is difficult for the operator to manually expand it. In this embodiment, the small diameter end of the conical block 31 should match the inner diameter of the retaining ring 915 in its natural state, and its large diameter end should be greater than the outer diameter of the guide nut 911 and the outer diameter of the central tube of the gap adjuster 92. The diameter corresponding to the positions of the above-mentioned vertical push rods 42 should be greater than or equal to the outer diameter of the large end of the conical block 31. In use, the retaining ring 915 is directly put on the small diameter end of the conical block 31. When the second pressure head 3 moves to the preset position and the vertical push rods 42 continue to move down, each vertical push rod 42 can abut against the end face of the retaining ring 915 and push the retaining ring 915 down. During the downward push, the retaining ring 915 moves from the small diameter end of the conical block 31 to the large diameter end and is continuously expanded. After that, the retaining ring 915 disengages from the conical block 31 and is pushed into the groove of the guide nut 911 or the groove of the gap adjuster 92.

[0056] By arranging the second pressure head 3 and the positioning member 8 coaxially, the positioning member 8 is used to center and position the nut-like structure. The middle conical block 31 of the second pressure head 3 is used to fit the retaining ring 915 to ensure the centering of the retaining ring 915 and the second pressure head 3. The cylindrical block 32 of the second pressure head 3 can be inserted into the upper inner hole of the nut-like structure to further ensure the centering of the second pressure head 3 and the nut-like structure. In this way, the centering of the guide nut 911 and the retaining ring 915, as well as the centering of the central tube of the gap adjuster 92 and the retaining ring 915, can be effectively guaranteed.

[0057] The aforementioned drive device 7 can be, for example, a cylinder. The piston rod of the cylinder is vertically arranged and its bottom end is fixedly connected to the aforementioned connecting rod 71 to drive the push rod assembly 4 to move up and down. A switch is also provided on the support frame 1 to control the cylinder's movement. The switch can be, for example, a lever valve. The operator can manually operate the lever valve to control the cylinder to move up or down.

[0058] When the nut-type press-fitting device is in its initial position, i.e. Figure 2 and Figure 3 As shown, both the buffer spring 52 and the return spring 64 are in a slightly compressed state, and the bottom surface of the first linear bearing 53 abuts against the top surface of the guide plate 61; the return spring 64 is also in a slightly compressed state, and the crossbar 63 abuts against the bottom hole wall of the side through hole of the first pressure head 2 under the elastic force of the return spring 64.

[0059] The following uses guide nut assembly 91 as an example. The retaining ring 915 is pressed into the groove of guide nut 911 using this type of nut-type press-fitting device. The press-fitting process is as follows:

[0060] The guide nut assembly 91 is fitted onto the positioning post 81, and the retaining ring 915 is fitted onto the small diameter end of the tapered block 31 of the second pressure head 3 (if necessary, the retaining ring 915 can also be fitted after the second pressure head 3 has moved to a preset position); the driving device 7 drives the connecting rod 71 to move downward, which in turn drives the top rod assembly 4 to move downward; due to the presence of the linkage assembly 5, the pressure plate 51 and the first pressure head 2 will move downward together; at the same time, due to the presence of the connecting assembly 6, the second pressure head 3 will also move downward together.

[0061] When the first pressure head 2 contacts the spring seat 913 of the guide nut 911, it will move the spring seat 913 downwards as it continues to move. When the first pressure head 2 reaches the preset position, i.e., when the slot is exposed, the first pressure head 2 stops moving, and the pressure plate 51 also stops moving. If the second pressure head 3 also reaches the preset position at this time (i.e., when the cylindrical block 32 of the second pressure head 3 is inserted into the inner hole of the guide nut 911 and the bottom surface of the conical block 31 abuts against the top surface of the guide nut 911), the second pressure head 3 stops moving. When the first pressure head 2 reaches the preset position, if the second pressure head 3 has not yet reached the preset position, since the second pressure head 3 can move up and down relative to the first pressure head 2, under the action of the connecting rod 71 continuing to move downwards and the elastic force of the return spring 64, the second pressure head 3 will move to the preset position and stop moving.

[0062] Then, the connecting rod 71 drives the push rod assembly 4 to continue moving downward, compressing the buffer spring 52 and driving the guide plate 61 to move downward together. The guide plate 61 moves downward relative to the vertical rod 62 and compresses the reset spring 64. The guide plate 61 also moves downward relative to the first linear bearing 53, and the first linear bearing 53 separates from the guide plate 61. The multiple vertical push rods 42 of the push rod assembly 4 push the retaining ring 915 downward, expand the retaining ring 915 and push it into the slot, completing the press-fitting process.

[0063] Then, the drive device 7 drives the connecting rod 71 to move upward, which in turn drives the top rod assembly 4 and the guide plate 61 to move upward together. When the guide plate 61 moves upward to abut against the first linear bearing 53, the buffer spring 52 and the second return spring 64 both return to their initial state. Then, the connecting rod 71 will drive the first pressure head 2 and the second pressure head 3 to move upward together until they return to their initial positions.

[0064] The retaining ring 915 is pressed into the slot of the clearance adjuster 92 using the pressing device. The pressing process is similar to that described above for pressing the retaining ring 915 into the slot of the guide nut 911, and will not be repeated here.

[0065] The above are merely illustrative embodiments of the present invention and are not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A nut-type pressing device, characterized in that, It includes a press-fitting assembly and a positioning component. The press-fitting assembly includes a support frame, a cylindrical first press head, a second press head, a push rod assembly, and a driving device. The first pressure head and the positioning member are arranged vertically at intervals on the support frame. The positioning member is used to center and position the guide nut assembly or clearance adjuster of the brake cylinder. The second pressure head is movable vertically and is arranged inside the first pressure head and can be used to mount the retaining ring of the brake cylinder. The push rod assembly is movable vertically and is arranged inside the first pressure head and located above the second pressure head. The first pressure head, the second pressure head, the push rod assembly and the positioning member are coaxially arranged. The driving device is connected to the push rod assembly and can drive the push rod assembly to move up and down. During the process of driving the push rod assembly to move down, the driving device can drive the first pressure head to move down together through the linkage assembly, and can drive the second pressure head to move down together through the connecting assembly. After the first pressure head moves to a preset position and the second pressure head moves to a preset position, the driving device can also drive the push rod assembly to continue to move down to push the retaining ring downward.

2. The nut-type pressing device as described in claim 1, characterized in that, The linkage assembly includes a pressure plate and a buffer spring. The upper end of the first pressure head is fixed to the bottom surface of the pressure plate. The driving end of the driving device is fixed to the top rod assembly through a connecting rod. The connecting rod can move up and down through the pressure plate. The buffer spring is sleeved on the connecting rod and its two ends respectively abut against the limiting part of the connecting rod and the top surface of the pressure plate.

3. The nut-type pressing device as described in claim 2, characterized in that, A first linear bearing is fixed through the center hole of the pressure plate, and the connecting rod is inserted into the first linear bearing so as to be able to move up and down.

4. The nut-type pressing device as described in claim 2, characterized in that, The support frame has vertically arranged guide columns, and the two ends of the pressure plate are sleeved on the guide columns, which can move up and down.

5. The nut-type pressing device as described in claim 2, characterized in that, An annular groove is provided around the center hole of the pressure plate, and the lower end of the buffer spring abuts against the bottom of the groove.

6. The nut-type pressing device as described in claim 2, characterized in that, The connecting assembly includes a guide plate, a vertical rod, and a horizontal rod. A side through hole is provided on the side wall of the first pressure head. The guide plate passes through the side through hole and is fixedly connected to the connecting rod. The vertical rod is located outside the first pressure head. The upper part of the vertical rod can slide up and down through the guide plate. A return spring is also sleeved on the vertical rod. The two ends of the return spring respectively abut against the bottom step of the guide plate and the vertical rod. The lower end of the vertical rod is fixedly connected to one end of the horizontal rod. The other end of the horizontal rod passes through the side through hole and is fixedly connected to the second pressure head. The horizontal rod can abut against the bottom wall of the side through hole.

7. The nut-type press-fitting device as described in claim 6, characterized in that, The guide plate has a mounting hole, and a second linear bearing is fixed through the mounting hole. The vertical rod is slidably inserted into the second linear bearing.

8. The nut-type pressing device as described in claim 2, characterized in that, The push rod assembly includes a fixing block fixed to the bottom end of the connecting rod and a plurality of vertical push rods circumferentially spaced and fixed to the bottom surface of the fixing block.

9. The nut-type pressing device as described in claim 1, characterized in that, The positioning element includes a positioning post, and the inner hole of the guide nut in the guide nut assembly can be fitted onto the positioning post; or, the positioning element includes a sleeve with a groove on the top for inserting and placing the gap adjuster.

10. The nut-type structure press-fitting device as described in claim 9, characterized in that, The second pressure head includes a conical block and a cylindrical block connected vertically. The outer wall of the conical block is used to fit the retaining ring. The cylindrical block can be inserted into the inner hole of the guide nut or the upper inner hole of the gap adjuster, and the bottom surface of the conical block can abut against the top surface of the guide nut or the gap adjuster.

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