A bogie traction center node press-fitting mechanism

Abstract

The present invention relates to the technical field of subway bogie production, and the technical problems to be solved by the present invention are low press-fitting precision and accuracy. In order to solve the above technical problems, the present invention provides a bogie traction center node press-fitting mechanism. The present invention comprises: a support frame is vertically arranged; the press-fitting platform comprises a horizontally arranged platform; the platform is connected to the support frame; the press-fitting assembly comprises a press-fitting power unit and a press-fitting module, and the press-fitting power unit is connected to the support frame; the output end of the press-fitting power unit is connected to the top of the press-fitting module, and is used to drive the press-fitting module to move up and down; the fixed tooling assembly comprises a lower fixed tooling arranged on the top of the platform and an upper fixed tooling arranged above the lower fixed tooling; a lower clamping groove is provided on the top of the lower fixed tooling, and the bottom of the traction center body to be press-fitted is clamped in the lower clamping groove; an upper clamping groove is provided on the bottom of the upper fixed tooling, and the top of the traction center node to be press-fitted is clamped in the upper clamping groove. The press-fitting precision and accuracy of the present invention are improved, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of subway bogie production, in particular to a bogie traction center node press-fitting mechanism. Background Art

[0002] During the processing and production of subways, the traction center is an important part to ensure the connection between the upper and lower bodies of the vehicle, and to ensure the efficiency and accuracy of the pressing of the traction center nodes.

[0003] The Chinese invention patent with publication number CN106312539B discloses a traction center press-fit centering tool, which includes a base, and three positioning holes are opened on the lower surface of the base. The center lines of the three positioning holes are located in the same plane. Positioning rods perpendicular to the lower surface of the base are inserted into the positioning holes. The spacing of the three positioning holes makes two of the positioning rods suitable for inserting into the round holes of the traction node, and the other positioning rod is suitable for inserting into the threaded hole of the traction body. However, it only assists the installation of the traction center node and cannot achieve automatic press-fitting.

[0004] However, how to realize the rapid and automatic press-fitting of the traction center nodes (i.e., press-fitting the traction center nodes into the traction center body to form a traction center assembly), and how to ensure the press-fitting precision and accuracy of the traction center nodes, and the low efficiency are the problems that need to be solved. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a bogie traction center node press-fitting mechanism, comprising: The support frame is arranged vertically; The press-fitting platform includes a horizontally arranged platform; the platform is connected to the supporting frame; The press-fitting assembly includes a press-fitting power unit and a press-fitting module. The press-fitting power unit is connected to the support frame. The output end of the press-fitting power unit is connected to the top of the press-fitting module to drive the press-fitting module to move up and down. The fixed tooling assembly comprises a lower fixed tooling arranged on the top of the platform and an upper fixed tooling arranged above the lower fixed tooling; a lower clamping groove is provided on the top of the lower fixed tooling, and the bottom of the traction center body to be pressed is clamped in the lower clamping groove, and the top of the traction center body to be pressed is exposed outside the lower fixed tooling; the traction center node to be pressed is placed in the traction center body to be pressed; an upper clamping groove is provided on the bottom of the upper fixed tooling, and the top of the traction center node to be pressed is clamped in the upper clamping groove; the upper fixed tooling is located directly below the pressing module.

[0007] In one embodiment of the present invention, a flange extending radially outward is provided at the bottom of the upper fixing tool.

[0008] In one embodiment of the present invention, a through hole is further provided at the bottom of the lower fixing tool, the through hole is coaxial with the lower clamping groove and is interconnected, and the diameter of the lower clamping groove is larger than the diameter of the through hole.

[0009] In one embodiment of the present invention, the height of the press-fitting power unit is adjustable.

[0010] In one embodiment of the present invention, the support frame includes a main frame and a support plate; the support plate is laterally connected to the main frame; and the press-fit power unit is connected to the support plate.

[0011] In one embodiment of the present invention, the main frame includes a base, a horizontal plate and columns arranged on both sides of the base; the base and the horizontal plate are arranged in parallel, and the columns are connected between the base and the horizontal plate.

[0012] In one embodiment of the present invention, a plurality of first connection holes are arranged on the column from top to bottom at intervals; a second connection hole is arranged on the support plate, and the first connection hole and the second connection hole are connected by a connecting piece.

[0013] In one embodiment of the present invention, the press-fitting assembly further comprises a guide sleeve connected to the support frame, and the press-fitting module moves up and down in the guide sleeve.

[0014] In one embodiment of the present invention, a handle is provided on the outer wall of the lower fixing tool.

[0015] In one embodiment of the present invention, a handle is provided on the outer wall of the upper fixing tool.

[0016] In one embodiment of the present invention, a handle is provided on the outer wall of the lower fixing tool; and a handle is provided on the outer wall of the upper fixing tool.

[0017] In one embodiment of the present invention, the press-fitting power unit adopts a single-column hydraulic mechanism.

[0018] The above technical solution of the present invention has the following advantages compared with the prior art: The bogie traction center node press-fitting mechanism described in the present invention has a lower fixed tooling to limit and fix the traction center body to be pressed, and an upper fixed tooling to protect the traction center node to be pressed; thus, the press-fitting power unit drives the press-fitting module to move downward, and applies pressure to the upper fixed tooling, so that the traction center node to be pressed is pressed into the traction center body to be pressed. The lower fixed tooling and the upper fixed tooling constrain the traction center body to be pressed and the traction center node to be pressed during the press-fitting process to prevent them from shifting or shaking; it can be seen that the press-fitting precision and accuracy of the present application are greatly improved, and it can press-fit with quality and quantity, and has a simple structure, stable and reliable, high yield rate, and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of a bogie traction center node press-fitting mechanism in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the bogie traction center node press-fitting mechanism from another perspective; Figure 3 yes Figure 1 A schematic diagram of press-fitting of a press-fitting assembly in a press-fitting mechanism of a bogie traction center node; Figure 4 yes Figure 1 A structural schematic diagram of a fixed tooling assembly in a bogie traction center node press-fitting mechanism; Figure 5 yes Figure 1 A structural schematic diagram of a support frame body in a bogie traction center node press-fitting mechanism; Figure 6 yes Figure 1 A structural schematic diagram of a press-fit assembly in a press-fit mechanism for a bogie traction center node; Figure 7 yes Figure 1 A schematic diagram of the structure of the lower fixing tool in the press-fitting mechanism of the bogie traction center node; Figure 8 yes Figure 1 A schematic diagram of the structure of the upper fixed tooling in the press-fitting mechanism of the bogie traction center node; Description of the accompanying drawings in the specification: 100, support frame; 110, main frame; 111, base; 112, horizontal plate; 113, column; 114, first connecting hole; 115, second connecting hole; 116, connecting piece; 120, support plate; 200, press-fitting platform; 210, platform; 300, press-fit assembly; 310, press-fit power unit; 320, press-fit module; 330, guide sleeve; 400, fixed tooling assembly; 410, lower fixed tooling; 411, lower slot; 412, through hole; 413, avoidance slot; 414, handle; 420, upper fixed tooling; 421, upper slot; 422, flange; 500, traction center body to be pressed; 510, ear; 600. The traction center node is to be pressed and installed. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] Reference Figure 1 to Figure 8 As shown, an embodiment of the present invention provides a bogie traction center node press-fitting mechanism, comprising: The support frame 100 is arranged vertically; The press-fitting platform 200 includes a horizontally arranged platform 210; the platform 210 is connected to the support frame 100; The press-fitting assembly 300 includes a press-fitting power unit 310 and a press-fitting module 320. The press-fitting power unit 310 is connected to the support frame 100. The output end of the press-fitting power unit 310 is connected to the top of the press-fitting module 320 to drive the press-fitting module 320 to move up and down. The fixed tooling assembly 400 includes a lower fixed tooling 410 arranged on the top of the platform 210 and an upper fixed tooling 420 arranged above the lower fixed tooling 410; a lower card slot 411 is provided on the top of the lower fixed tooling 410, and the bottom of the traction center body 500 to be pressed is carded in the lower card slot 411, and the top of the traction center body 500 to be pressed is exposed outside the lower fixed tooling 410; the traction center node 600 to be pressed is placed in the traction center body 500 to be pressed; an upper card slot 421 is provided on the bottom of the upper fixed tooling 420, and the top of the traction center node 600 to be pressed is carded in the upper card slot 421; the upper fixed tooling 420 is located directly below the pressing module 320.

[0022] Specifically, the lower fixed tool 410 of this embodiment limits and fixes the traction center body 500 to be pressed, and the upper fixed tool 420 protects the traction center node 600 to be pressed to avoid excessive pressing force due to misoperation and irreversible deformation; thus, the pressing power unit 310 drives the pressing module 320 to move downward, and applies pressure to the upper fixed tool 420, so that the traction center node 600 to be pressed is pressed into the traction center body 500 to be pressed. The lower fixed tool 410 and the upper fixed tool 420 constrain the traction center body 500 to be pressed and the traction center node 600 to be pressed during the pressing process to prevent them from shifting or shaking; it can be seen that the present application can realize the rapid pressing of the traction center node and ensure the pressing precision and accuracy of the traction center node. It has a simple structure, is stable and reliable, has a high yield rate, and is highly efficient.

[0023] Furthermore, a flange 422 extending radially outward is provided at the bottom of the upper fixing tool 420. That is, the outer diameter of the flange 422 is greater than the diameter of the outer wall of other parts of the upper fixing tool 420. Specifically, the provision of the flange 422 can reduce the weight of the upper fixing tool 420 and increase the contact area between the upper fixing tool 420 and the top surface of the traction center body 500 to be press-fitted, thereby reducing the pressure of the traction center body 500 to be press-fitted during the press-fitting process, and further protecting the traction center body 500 to be press-fitted.

[0024] Furthermore, a through hole 412 is also provided at the bottom of the lower fixed tool 410, and the through hole 412 is coaxial with the lower card slot 411, and the through hole 412 and the lower card slot 411 are interconnected, and the diameter of the lower card slot 411 is larger than the diameter of the through hole 412. Specifically, the through hole 412 is provided in this embodiment, so that when the traction center node needs to be regularly maintained or damaged, the lower fixed tool 410 is turned upside down and placed on the press-fitting platform 200 (that is, the through hole 412 faces upward), and then the entire traction center assembly is turned upside down and placed in the lower fixed tool 410, and then the press-fitting assembly 300 of the present application is pressed down to remove the traction center node from the traction center body. Therefore, the present application can take into account both the press-fitting of the traction center assembly and the removal of the traction center node, and has a wide range of applications.

[0025] Furthermore, the height of the press-fit power unit 310 is adjustable, that is, the height of the support plate 120 on the main frame 110 is adjustable. Specifically, this embodiment can press-fit traction center nodes of different specifications, and has a wide range of applications.

[0026] Further, the support frame 100 includes a main frame 110 and a support plate 120; the support plate 120 is laterally connected to the main frame 110; and the press-fit power unit 310 is connected to the support plate 120. In some possible embodiments, there are two support plates 120, the two support plates 120 are arranged back to back, and the two support plates 120 are clamped and fixed on the front and rear sides of the main frame 110. The top of the press-fit power unit 310 is fixedly connected to the top of the support plate 120. The telescopic end of the press-fit power unit 310 passes through the area between the two support plates 120 and extends to the bottom of the support plate 120, so as to facilitate press-fitting.

[0027] Furthermore, the main frame 110 includes a base 111, a horizontal plate 112, and columns 113 disposed on both sides of the base 111; the base 111 and the horizontal plate 112 are arranged in parallel, and the columns 113 are connected between the base 111 and the horizontal plate 112. In some embodiments, the base 111 and the columns 113 are connected as one body. Its structure is stable and reliable, and it is made of materials commonly used in workshops to reduce costs.

[0028] Further, a plurality of first connection holes 114 are arranged at intervals from top to bottom on the column 113; a second connection hole 115 is arranged on the support plate 120, and the first connection hole 114 and the second connection hole 115 are connected by a connecting member 116. In some possible embodiments, the connecting member 116 may be a center pin. In other possible embodiments, the connecting member 116 may be a bolt. In some embodiments, the connection structure between the support plate 120 and the main frame 110 may also be other existing structures (for example, a slide groove extending from bottom to top is arranged on the column 113, and the support plate 120 is connected to the slide groove by a fastening screw), so as to achieve the height adjustment of the support plate 120 on the main frame 110. It has a simple structure and low manufacturing cost.

[0029] Furthermore, the press-fitting assembly 300 further includes a guide sleeve 330 connected to the support frame 100, and the press-fitting module 320 moves up and down in the guide sleeve 330. Specifically, the guide sleeve 330 is provided in this embodiment, so that the press-fitting module 320 is guided during the press-fitting process, thereby ensuring the press-fitting qualified rate.

[0030] It should be noted that the bottom and top of the outer wall of the lower fixed tool 410 are respectively provided with avoidance grooves 413. The avoidance grooves 413 are used to avoid the ears 510 of the traction center body 500 to be pressed. Specifically, there are two ears 510 on the top of the traction center body 500 to be pressed. Therefore, two avoidance grooves 413 are respectively provided on the top of the outer wall of the lower fixed tool 410. In addition, the present application can also be used for the replacement of old traction center nodes (that is, the damaged old traction center nodes need to be disassembled from the traction center body), so two avoidance grooves 413 are also provided at the bottom of the outer wall of the lower fixed tool 410.

[0031] Further, the outer wall of the lower fixing tool 410 is provided with a handle 414. For another example, the outer wall of the upper fixing tool 420 is provided with a handle 414. For another example, the outer wall of the lower fixing tool 410 is provided with a handle 414; the outer wall of the upper fixing tool 420 is provided with a handle 414. In some embodiments, the outer wall of the lower fixing tool 410 is symmetrically provided with two handles 414. The outer wall of the upper fixing tool 420 is also provided with two handles 414. Specifically, the handles 414 provided in this embodiment facilitate the taking of the lower fixing tool 410 and the upper fixing tool 420.

[0032] Furthermore, the press-fitting power unit 310 adopts a single-column hydraulic mechanism. In some possible embodiments, the single-column hydraulic mechanism is connected to the motor through a hydraulic pipeline, and the motor is arranged on one side of the support frame 100. For example, the motor is arranged on the outside of the column 113. The press-fitting module 320 is controlled to move up and down by the motor. Specifically, its operation is stable and reliable, and the price is low. In some embodiments, the single-column hydraulic mechanism includes a single-column hydraulic cylinder and a motor. The lifting and lowering of the single-column hydraulic cylinder are controlled by the motor through two oil injection pipelines, thereby controlling the up and down movement of the press-fitting module 320. The motor 23 is installed on the outside of the support frame 100. When the motor 23 rotates forward, the press-fitting module 320 can be controlled to move downward, so that the press-fitting module 320 can perform press-fitting of the traction center node.

[0033] During use, the traction center body 500 to be press-fitted is firmly fixed on the press-fitting platform 200, and then the traction center node 600 to be press-fitted is accurately press-fitted into the traction center body 500 to be press-fitted by the strong pressure of the press-fitting power unit 310. This device not only significantly improves the press-fitting efficiency of the traction center node, but also ensures the high precision and accuracy of the press-fitting process.

[0034] The press-fitting force of the present invention can be satisfied by the motor power output, which can be up to 1500N. In one embodiment, the outer diameter of the pulling center body Φ210mm, inner diameter Φ170 (0, +0.063) mm. The traction center node The outer diameter is Φ170mm and the inner diameter is Φ110mm; the interference between the inner diameter of the press-fit traction center and the outer diameter of the traction center node It is 0.050mm~0.100mm.

[0035] Secondly, the material of the traction center body is QT600-3, with an elastic modulus of Ea=173Gpa and a Poisson's ratio of Va=0.3. The surface material of the traction center node is carbon steel, with an elastic modulus of Ei=206Gpa and Vi=0.24; the friction coefficient of the mating surface of the two (traction center body and traction center node) is μ=0.1, and the indentation depth is The inclusion coefficient is 125mm. (The contained part is the traction center body), the contained part coefficient (The contained part is the traction center node), the diameter ratio of the contained part , the diameter ratio of the contained part The calculation formula is:

[0036] Pressing force The calculation formula is:

[0037] The calculated press-fitting force is 715.78N, which meets the interference fit requirements.

[0038] Secondly, when the traction center node is removed, its pressing force The calculation formula is:

[0039] The calculated pressing force is 930.51~1073.67N, which meets the removal requirements.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A bogie traction center node press-fitting mechanism, characterized in that: include: The support frame is arranged vertically; Pressing platforms, including horizontally arranged platforms; The platform is connected to the support frame; The press-fitting assembly comprises a press-fitting power unit and a press-fitting module, wherein the press-fitting power unit is connected to the support frame; the output end of the press-fitting power unit is connected to the top end of the press-fitting module to drive the press-fitting module to move up and down; The fixing tool assembly comprises a lower fixing tool arranged on the top of the platform and an upper fixing tool arranged above the lower fixing tool; the top of the lower fixing tool is provided with a lower clamping groove, the bottom of the traction center body to be pressed is clamped in the lower clamping groove, and the top of the traction center body to be pressed is exposed outside the lower fixing tool; The traction center node to be pressed is placed in the traction center body to be pressed; an upper card slot is provided at the bottom of the upper fixed tool, and the top of the traction center node to be pressed is clamped in the upper card slot; the upper fixed tool is located directly below the press module.

2. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: The bottom of the upper fixing tool is provided with a flange extending radially outward.

3. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: A through hole is also provided at the bottom of the lower fixing tool, the through hole is coaxial with the lower clamping groove and is connected to each other, and the diameter of the lower clamping groove is larger than the diameter of the through hole.

4. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: The height of the press-fitting power unit is adjustable.

5. The bogie traction center node press-fitting mechanism according to claim 4, characterized in that: The support frame includes a main frame and a support plate; the support plate is transversely connected to the main frame; and the press-fit power unit is connected to the support plate.

6. The bogie traction center node press-fitting mechanism according to claim 5, characterized in that: The main frame includes a base, a horizontal plate and columns arranged on both sides of the base; the base and the horizontal plate are arranged in parallel, and the columns are connected between the base and the horizontal plate.

7. The bogie traction center node press-fitting mechanism according to claim 6, characterized in that: A plurality of first connection holes are arranged on the column from top to bottom at intervals; a second connection hole is arranged on the support plate, and the first connection hole is connected to the second connection hole through a connecting piece.

8. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: The press-fitting assembly also includes a guide sleeve connected to the support frame, and the press-fitting module moves up and down in the guide sleeve.

9. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: The outer wall of the lower fixing tool is provided with a handle; And / or, a handle is provided on the outer wall of the upper fixing tool.

10. The bogie traction center node press-fitting mechanism according to claim 1, characterized in that: The press-fitting power unit adopts a single-column hydraulic mechanism.

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