A tooling device for press fitting a center pin bushing

Abstract

The application discloses a tool device for center pin sleeve press fitting, relates to the technical field of track engineering vehicles, and comprises a tool mechanism, a center pin sleeve and a traction beam, and the traction beam is in interference fit with the center pin sleeve; the tool mechanism comprises a connecting member and a press fitting mechanism, the press fitting mechanism is provided with a limiting hole and a first weight-reducing hole; the connecting member is internally provided with a second weight-reducing hole, and the press fitting mechanism and the connecting member are integrally formed; and the press fitting mechanism is arranged above the center pin sleeve. The plurality of weight-reducing holes can prevent the tool from being too heavy due to self weight, thereby causing inconvenience in operation, and improve the convenience and work efficiency of operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail engineering vehicles, in particular to a tool device for press-fitting a center pin sleeve. BACKGROUND

[0002] A bogie traction device of a rail transit vehicle is composed of a center pin, a center pin sleeve, a traction beam, a traction rod and the like. The inner and outer sleeves of the center pin sleeve are metal, and the middle part is rubber, which is vulcanized. The center pin sleeve is in interference fit with the traction beam, and is in contact with the center pin taper surface, and is connected by a lower cover and bolts to form a tightly fitted structure. It realizes gapless traction. When assembling the bogie, a press machine is needed to press-fit the center pin sleeve into the traction beam. Since the height of the inner sleeve of the center pin sleeve is higher than that of the outer sleeve, when directly using the press machine for press-fitting, the force applied by the press machine acts on the inner sleeve of the center pin sleeve, and the reverse force of the traction beam on the center pin sleeve acts on the outer sleeve. The rubber vulcanized between the inner sleeve and the outer sleeve is simultaneously subjected to two opposite forces, causing damage to the rubber and peeling of the rubber and metal.

[0003] Chinese patent CN201932179U relates to a center pin sleeve for a railway vehicle bogie, which is connected with a vehicle body and a bogie, and specifically comprises an outer sleeve, a single-layer rubber and a mandrel, which are heat-formed into an integrated structure. The length of the mandrel is greater than the length of the outer sleeve, the side of the single-layer rubber in contact with the mandrel has the same length as the mandrel, and the side in contact with the outer sleeve has the same length as the outer sleeve. The wide part and the narrow part between the two ends of the single-layer rubber are smoothly transitioned in an arc shape. The mandrel is provided as a ring-shaped shaft body with a conical hollow inside. However, when using the press machine for direct press-fitting, the rubber will be damaged and the rubber and metal will peel off.

[0004] Chinese patent CN107512284A discloses a traction device, a bogie and a vehicle. The traction device comprises a traction beam and an elastic traction member installed on the traction beam, which is used to connect with the frame of the bogie. The traction beam comprises a wing plate part, and the elastic traction member is installed on the wing plate part. However, the height of the inner sleeve of the patent is higher than that of the outer sleeve, and the same problem of rubber damage and peeling of rubber and metal will occur when using the press machine for direct press-fitting.

[0005] Therefore, it is urgent to design a device that overcomes the height difference between the inner and outer sleeves of the center pin sleeve and avoids the problem of rubber damage. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a tool device for press-fitting a center pin sleeve.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] A tool device for center pin sleeve press fitting, comprising a tool mechanism, a center pin sleeve and a traction beam,

[0009] The traction beam is in interference fit with the center pin sleeve.

[0010] The tool mechanism comprises a connecting member and a press fitting mechanism, the press fitting mechanism is provided with a limiting hole and a first weight reduction hole; the connecting member is internally provided with a second weight reduction hole, and the press fitting mechanism and the connecting member are integrally formed.

[0011] The press fitting mechanism is arranged above the center pin sleeve.

[0012] Based on the above technical scheme, further, the press fitting mechanism is a press fitting disc, which is a cylindrical structure.

[0013] Based on the above technical scheme, further, the center pin sleeve comprises an outer sleeve and an inner sleeve, rubber is clamped between the outer sleeve and the inner sleeve, the height of the outer sleeve is lower than the height of the inner sleeve, the outer sleeve is attached to the inner wall of the traction beam, and the inner sleeve is attached to the outer wall of the center pin sleeve.

[0014] Based on the above technical scheme, further, the traction beam is externally provided with a wing plate part, and the wing plate part is arranged on a mounting seat.

[0015] Based on the above technical scheme, further, the height difference between the inner sleeve and the outer sleeve of the center pin sleeve is H, and the vertical height of the limiting hole is greater than H.

[0016] Based on the above technical scheme, further, the outer diameter of the press fitting disc is smaller than the inner diameter of the traction beam, and the outer diameter of the press fitting disc is greater than the inner diameter of the outer sleeve of the center pin sleeve.

[0017] Based on the above technical scheme, further, the inner diameter of the press fitting disc is smaller than the inner diameter of the outer sleeve of the center pin sleeve, and the inner diameter of the press fitting disc is greater than the outer diameter of the inner sleeve of the center pin sleeve.

[0018] Based on the above technical scheme, further, the limiting hole, the first weight reduction hole and the second weight reduction hole are coaxially communicated, and the eccentricity caused by welding error after actual welding does not affect the use of the tool.

[0019] Based on the above technical scheme, further, the bottom end face of the press fitting disc is attached to the upper end face of the outer sleeve, and the inner sleeve is located below the limiting hole.

[0020] Based on the above technical scheme, further, the height of the rubber is lower than the height of the outer sleeve, and the rubber is located below the limiting hole.

[0021] Based on the above technical scheme, further, the connecting member is a connecting column, which is a cylindrical structure,

[0022] Based on the above technical solution, furthermore, the limiting hole is located in the middle of the pressing plate and can be set as a circular groove shape.

[0023] Compared with the prior art, the beneficial effects of the present invention are specifically reflected in:

[0024] This invention features an inner sleeve embedded in the limiting hole of the pressing mechanism, with the bottom edge of the pressing mechanism fitting against the upper surface of the outer sleeve. This allows the pressure to act directly on the outer sleeve during interference fitting without contacting the inner sleeve or the rubber, thus avoiding damage to the rubber and separation between the rubber and metal, and reducing the tooling loss rate. At the same time, the multiple weight-reducing holes prevent the tooling from becoming too heavy, which would cause inconvenience in operation, improving the convenience of operation and work efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention in the press-fit state.

[0026] Figure 2 This is a schematic diagram of the structure of the present invention in the pressed-in state;

[0027] Figure 3 This is a schematic diagram of the combined structure of the connecting column and the pressing plate of the present invention;

[0028] Reference numerals: 1. Connecting column; 11. Second weight reduction hole; 2. Pressing plate; 21. Limiting hole; 22. First weight reduction hole; 3. Wing plate; 4. Traction beam; 5. Outer sleeve; 6. Inner sleeve; 7. Mounting base; 8. Rubber; 9. Threaded hole. Detailed Implementation

[0029] To make the objectives and technical solutions of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with embodiments.

[0030] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "lateral", "longitudinal", etc., 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 the present invention 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 the present invention.

[0031] Example 1

[0032] like Figures 1-2 The diagram shows a tooling device for press-fitting center pin sleeves, wherein... Figure 1The arrow in the figure indicates the direction of the pressure applied by the press during operation, including the tooling mechanism, the center pin sleeve, and the traction beam 4, which is in interference fit with the center pin sleeve. The traction beam 4 extends outward to have a wing plate part 3, which is arranged on a mounting seat 7. The tooling mechanism includes a connecting member and a press-fitting mechanism, which is provided with a limiting hole 21 and a first weight-reducing hole 22. The connecting member is internally provided with a second weight-reducing hole 11, and the press-fitting mechanism and the connecting member are integrally formed. The press-fitting mechanism is arranged above the center pin sleeve.

[0033] The wing plate part 3 of the traction beam 4 is provided with two traction holes at the lower end, which are symmetrically arranged with the vertical center line of the traction beam 4 as the center of symmetry. The traction holes can be arc-shaped through holes for installing traction rods. A through hole is arranged at the middle position of the traction beam 4 for installing the center pin sleeve. When the press moves downward, the tooling mechanism is installed at the upper end of the through hole, thereby driving the center pin sleeve to pass through the upper end of the through hole and the position inside the through hole in sequence. The bottom of the traction beam 4 is provided with a limiting plane. When the center pin sleeve is press-fitted to the limiting plane, it is in place.

[0034] The center pin sleeve includes an outer sleeve 5 and an inner sleeve 6, and the rubber 8 is arranged between the outer sleeve 5 and the inner sleeve 6. The height of the outer sleeve 5 is lower than that of the inner sleeve 6. The outer sleeve 5 is attached to the inner wall of the traction beam 4, and the inner sleeve 6 is attached to the outer wall of the center pin sleeve. The height difference between the inner sleeve 6 and the outer sleeve 5 of the center pin sleeve is H, and the vertical height of the limiting hole 21 is greater than H. The outer diameter of the press-fitting disc 2 is smaller than the inner diameter of the traction beam 4, and the outer diameter of the press-fitting disc 2 is greater than the inner diameter of the outer sleeve 5 of the center pin sleeve. The inner diameter of the press-fitting disc 2 is smaller than the inner diameter of the outer sleeve 5 of the center pin sleeve, and the inner diameter of the press-fitting disc 2 is greater than the outer diameter of the inner sleeve 6 of the center pin sleeve. The inner sleeve 6 is provided with a tapered hole at the middle position. The cross-sectional diameter gradually decreases from the upper end surface of the inner sleeve 6 to the lower end surface of the inner sleeve 6, that is, the tapered hole has a tapered structure. The lower end of the tapered hole is provided with a threaded hole 9 for installing a bolt or the like fixing member. The diameter of the threaded hole can be greater than or smaller than the cross-sectional diameter of the lower end surface of the tapered hole, and the threaded hole is located inside the inner sleeve 6. The bottom end surface of the press-fitting disc 2 is attached to the upper end surface of the outer sleeve 5, and the inner sleeve 6 is located below the hole opening of the limiting hole 21. The height of the rubber 8 is lower than that of the outer sleeve 5, and the rubber 8 is located below the hole opening of the limiting hole 21.

[0035] As shown in Figure 3 The limiting hole 21, the first weight-reducing hole 22, and the second weight-reducing hole 11 are coaxially communicated, and the diameter of the first weight-reducing hole 22 is equal to that of the second weight-reducing hole 11. The connecting member is a connecting column 1, which has a cylindrical structure. The press-fitting mechanism is a press-fitting disc 2, which has a cylindrical structure. The limiting hole 21 is arranged at the middle position of the press-fitting disc 2 and can have a circular groove shape.

[0036] The working principle of the device is as follows:

[0037] The outer diameter of the tooling press-fitting disc 2 is smaller than the inner diameter of the traction beam 4 and larger than the inner diameter of the center pin sleeve outer sleeve 5. The limiting hole 21 of the tooling press-fitting disc 2 has a hole diameter larger than the outer diameter of the center pin sleeve inner sleeve 6, that is, the circumference of the press-fitting disc 2 can be in close contact with the center pin sleeve outer sleeve 5 and will not be in contact with the inner wall of the traction beam 4, and at the same time, the limiting hole 21 leaves space for the center pin sleeve inner sleeve 6. When press-fitting, the press machine contacts the upper plane of the tooling connecting column 1, and the press-fitting force needs to be kept unchanged and continuous until the center pin sleeve is pressed to the limiting plane at the bottom of the traction beam 4.

[0038] The process of tooling production is as follows: after the press-fitting disc 2 is welded with the connecting column 1, the whole is processed to process the upper and lower planes of the tooling, and the parallelism, flatness and perpendicularity are ensured.

[0039] The above is only an embodiment of the present application, which is described in detail, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A tooling device for press fitting a center pin bushing, characterized by, The tooling mechanism, the center pin sleeve and the traction beam, The traction beam is in interference fit with the center pin sleeve; The tooling mechanism comprises a connecting member and a press-fitting mechanism, the press-fitting mechanism is provided with a limiting hole and a first weight-reducing hole; the connecting member is internally provided with a second weight-reducing hole, and the press-fitting mechanism and the connecting member are integrally formed; the press-fitting mechanism is arranged above the center pin sleeve; The bottom end surface of the press-fitting mechanism is attached to the upper end surface of the outer sleeve, and the inner sleeve is located below the limiting hole; The center pin sleeve comprises an outer sleeve and an inner sleeve, and rubber is clamped between the outer sleeve and the inner sleeve; the height of the outer sleeve is lower than the height of the inner sleeve, the outer sleeve is attached to the inner wall of the traction beam, and the inner sleeve is attached to the outer wall of the center pin sleeve; The height of the rubber is lower than the height of the outer sleeve, and the rubber is located below the limiting hole; The outer diameter of the press-fitting mechanism is smaller than the inner diameter of the traction beam, and the outer diameter of the press-fitting mechanism is larger than the inner diameter of the outer sleeve of the center pin sleeve; The inner diameter of the press-fitting mechanism is smaller than the inner diameter of the outer sleeve of the center pin sleeve, and the inner diameter of the press-fitting mechanism is larger than the outer diameter of the inner sleeve of the center pin sleeve; The height difference between the inner sleeve and the outer sleeve of the center pin sleeve is H, and the vertical height of the limiting hole is greater than H.

2. A tooling device for press fitting a center pin sleeve as defined in claim 1, wherein, The limiting hole, the first weight-reducing hole and the second weight-reducing hole are coaxially communicated.

3. A tooling device for press fitting a center pin sleeve as defined in claim 1, wherein, The hole diameter of the first weight-reducing hole is equal to the hole diameter of the second weight-reducing hole, and the hole diameter of the limiting hole is greater than the hole diameter of the first weight-reducing hole.

4. The tooling apparatus for press fitting a center pin bushing of claim 1, wherein, The wing plate part is arranged on the mounting seat.

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