Clamping and fixing device for axle box spring lower clamping plate

Abstract

The utility model belongs to the field of subway axle box spring assembly, and particularly discloses a clamping device of an axle box spring lower clamping plate, which comprises a press machine and a clamping tool, the clamping tool is located below the press machine and comprises a press fitting table, a spring, a supporting frame, a press fitting disc, a positioning plate, a bottom plate and a limiting column. Limiting columns are installed at the top of the supporting frame, and a bottom plate is arranged at the bottom of the supporting frame and used for containing an axle box spring lower clamping plate with a fixing piece. A positioning plate is further arranged at the position, close to the bottom plate, of the supporting frame; the press-fitting table comprises a press-fitting plate and a connecting column, the bottom of the press-fitting plate is perpendicularly connected with the connecting column, the connecting column is connected with the press-fitting disc, the connecting column is sleeved with the spring, the top of the spring abuts against the press-fitting plate, the bottom of the spring abuts against an inner ring of the limiting column, and the press-fitting disc is located below the top of the supporting frame and moves up and down along with the press-fitting table.

Description

Technical Field

[0001] The utility model belongs to the field of subway axle box spring assembly, and specifically discloses a clamping device for a lower clamping plate of an axle box spring. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] During the production of subway axle box spring components, the rubber stop studs need to be coated with Loctite glue and screwed into the lower clamping plate of the spring (such as Figure 1 The general tightening torque is 350 N·m. However, due to the circular structure of the spring lower clamping plate, the spring lower clamping plate is prone to rotation when the rubber stopper is tightened, and its clamping and fixing is more difficult.

[0004] The current solution is to use a lower clamping tool to lift the lower clamping plate of the axle box spring into the locker, and then use the locker to lock the lower clamping plate of the axle box spring; rely on the locking force to clamp the lower clamping plate of the spring. For details, please refer to the patent: A fixing device for the lower clamping plate of the axle box spring, application number CN 201810779576.0; However, this method has the following disadvantages:

[0005] 1. Since the locking force of the clamp is smaller than the tightening torque of the rubber stop after being used several times, the lower clamp of the spring is likely to rotate during tightening.

[0006] 2. It is troublesome to repeatedly tighten the clamp and it is easy to cause bumps and damage to the paint. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a clamping device for the lower spring plate of the axle box, which can overcome the problems that the lower spring plate is easily rotated when the rubber stop is tightened, and that repeated locking of the clamp is troublesome and easily causes bumps and damages to the paint.

[0008] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0009] The embodiment of the utility model provides a clamping device for a lower clamping plate of an axle box spring, comprising a press and a clamping tool;

[0010] The clamping tool is located below the press, and includes a press table, a spring, a support frame, a press plate, a positioning plate, a bottom plate and a limit column;

[0011] A limiting column is installed on the top of the support frame, and the bottom of the support frame is a base plate, which is used to place the lower clamp of the axle box spring with a fixing part; a positioning plate is also arranged at a position of the support frame close to the base plate; the press-fitting table includes a press-fitting plate and a connecting column, the bottom of the press-fitting plate is vertically connected to the connecting column, the connecting column is connected to the press-fitting disk, the spring is sleeved on the connecting column, the top of the spring abuts on the press-fitting plate, and the bottom abuts on the inner circle of the limiting column, the press-fitting disk is located below the top of the support frame, and the press-fitting disk moves up and down with the press-fitting table.

[0012] When in use, first fix the spring lower clamp on the bottom plate, and then fix the spring lower clamp from the top through the pressing plate, which overcomes the problem of the spring lower clamp rotating during the tightening process of the rubber stopper, thereby achieving the effect of tightening in one time without damaging the spring lower clamp; and when the specified torque is reached, the press is raised, and due to the action of the spring force, the pressing table and the pressing plate will be automatically lifted, which is easy to operate.

[0013] As a further technical solution, a positioning plate is also included, and the positioning plate is an arc-shaped plate.

[0014] As a further technical solution, two arc-shaped plates are provided, respectively located at two corners of the support frame.

[0015] As a further technical solution, the press-fitting disk includes a connecting disk, a column and a pressing plate; the center position of the connecting disk is connected to the pressing table; a plurality of columns are connected to the bottom of the connecting disk, and the columns are arranged in the working direction to form a set angle, and an arc-shaped pressing plate is connected to the bottom of the columns.

[0016] As a further technical solution, a layer of rubber is pasted on the bottom of the pressure plate in contact with the lower clamping plate of the axle box spring to avoid damage to the lower clamping plate of the axle box spring.

[0017] As a further technical solution, the press is connected to a trapezoidal pressure head.

[0018] As a further technical solution, a gap reserved between the bottom of the trapezoidal pressing head and the top of the supporting frame is larger than the movement distance of the pressing table.

[0019] As a further technical solution, a cylindrical hole is opened on the bottom plate, and the cylindrical hole is slightly larger than the circular hole at the lower part of the lower clamping plate of the axle box spring.

[0020] As a further technical solution, the diameter of the contact portion between the pressing plate of the pressing table and the trapezoidal pressing head is the same as the width of the trapezoidal pressing head.

[0021] As a further technical solution, guide shafts are provided on both sides of the press.

[0022] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0023] The spring lower clamping device proposed by the utility model first fixes the spring lower clamp on the bottom plate, and then fixes the spring lower clamp from the top through the pressing plate, thereby overcoming the problem that the rubber stopper rotates during the tightening process of the spring lower clamp, thereby achieving the effect of one-time tightening without damaging the spring lower clamp, and avoiding the problem of paint being damaged by bumps; and when the specified torque is reached, the press is raised, and due to the action of the spring force, the pressing table and the pressing plate will be automatically lifted, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is a structural diagram of the assembly of the lower clamping plate of the axle box spring and the rubber stopper in the prior art.

[0026] Figure 2 It is a structural schematic diagram of the spring lower clamping plate clamping device of the utility model in the use state;

[0027] Figure 3 It is a side view of the spring lower clamping device of the utility model in the use state;

[0028] Figure 4 It is a schematic diagram of the spring lower clamping device of the utility model in a non-use state;

[0029] Figure 5 It is a schematic diagram of the structure of the press plate;

[0030] Figure 6 It is a schematic diagram of the structure of a trapezoidal pressure head;

[0031] Figure 7 It is a structural schematic diagram of the press table;

[0032] Figure 8 It is a schematic diagram of the lower clamping plate of the axle box spring of the part to be fixed;

[0033] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for illustration only.

[0034] 1 press machine, 1.1 double optical axis, 1.2 trapezoidal pressure head,

[0035] 2 Clamping fixture, 2.1 Pressing table, 2.2 Spring, 2.3 Support frame, 2.4 Pressing plate, 2.5 Positioning plate, 2.6 Bottom plate, 2.6.1 Cylindrical hole, 2.7 Limiting column; 2.1.1 Pressing plate, 2.1.2 Connecting column; 2.4.1 Connecting plate, 2.4.2 Column, 2.4.3 Pressing plate

[0036] 3. Parts to be fixed: axle box spring lower clamp;

[0037] 4 Support beams. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0040] For the convenience of description, if the words "upper" and "lower" appear in the present invention, they only indicate that they are consistent with the upper and lower directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0041] As introduced in the background technology, the prior art adopts a lower clamping tool to lift the lower clamping plate of the axle box spring into the locking device, and then use the locking device to lock the lower clamping plate of the axle box spring; the lower clamping plate of the spring is clamped by relying on the locking force; however, since the locking force of the clamp is less than the tightening torque of the rubber stopper after being used several times, the lower clamping plate of the spring is easy to rotate during tightening; repeated locking of the clamp is troublesome and easy to cause bumps and damage to the paint; in order to solve the above technical problems, the utility model proposes a clamping device for the lower clamping plate of the axle box spring; it includes a press and a clamping tool; the clamping tool is located at the press Below the force machine, the clamping tooling includes a press-fitting table, a spring, a support frame, a press-fitting disk, a positioning plate, a base plate and a limit column; a limit column is installed on the top of the support frame, and the bottom of the support frame is the base plate, which is used to place the lower clamp of the axle box spring with a fixing; a positioning plate is also provided at a position of the support frame close to the base plate; the press-fitting table includes a press-fitting plate and a connecting column, the bottom of the press-fitting plate is vertically connected to the connecting column, the connecting column is connected to the press-fitting disk, the spring is sleeved on the connecting column, the top of the spring abuts on the press-fitting plate, and the bottom abuts on the inner circle of the limit column, the press-fitting disk is located below the top of the support frame, and the press-fitting disk moves up and down with the press-fitting table. First, fix the spring lower clamp on the bottom plate, and then fix the spring lower clamp from the top through the pressing plate, which overcomes the problem of the spring lower clamp rotating during the tightening process of the rubber stopper, thereby achieving the effect of one-time tightening without damaging the spring lower clamp; and when the specified torque is reached, the press is raised, and due to the action of the spring force, the pressing table and the pressing plate will be automatically lifted, which is easy to operate.

[0042] In a typical implementation of the present invention, Figure 2 , Figure 3 , Figure 4 As shown, a clamping device for the lower clamping plate of the axle box spring proposed in this embodiment includes a support beam 4, a press 1 is installed on the upper part of the support beam, and a clamping tool 2 is fixed on the lower part; the press 1 drives the clamping tool to work to clamp the lower clamping plate 3 of the axle box spring to be fixed. The structure of the lower clamping plate 3 of the axle box spring to be fixed is shown in FIG. Figure 8 and Figure 1 , a through hole is provided at the bottom.

[0043] Further, such as Figure 1 As shown, both sides of the press 1 are guided by the dual optical axes 1.1 to ensure the stability of the press during press fitting; a trapezoidal pressing head 1.2 is arranged at the head of the press 1 to position the press fitting table, and when the trapezoidal pressing head 1.2 presses the press fitting table to the lowest part, there is a partial gap between the bottom of the trapezoidal pressing head 1.2 and the support frame, so as to facilitate the pressure of the press to be transmitted to the ground and prevent damage to the support frame.

[0044] Specifically, the structure of the trapezoidal pressure head 1.2 is as follows Figure 6 As shown, it is a columnar structure, a trapezoidal groove is opened inside the columnar structure, and the gap reserved between the bottom of the trapezoidal pressing head 1.2 and the top of the supporting frame 2.3 is larger than the movement distance of the pressing table 2.1;

[0045] The above-mentioned axle box spring lower clamping tool 2, such as Figure 2 , Figure 3 , Figure 4 As shown, it includes a press-fitting table 2.1, a spring 2.2, a support frame 2.3, a press-fitting plate 2.4, a positioning plate 2.5, a bottom plate 2.6, and a limiting column 2.7;

[0046] A limiting column 2.7 is installed on the top of the support frame 2.3; the limiting column 2.7 is mainly used to limit the movement distance of the press-fitting table; the bottom of the support frame 2.3 is a bottom plate 2.6, which is used to place the lower clamping plate of the axle box spring with a fixing part; a positioning plate 2.5 is also arranged at a position of the support frame 2.3 close to the bottom plate 2.6; the positioning plate 2.5 is an arc-shaped plate, two of which are arranged and are respectively located at two corners of the support frame 2.3;

[0047] The press-fitting station 2.1 includes a press-fitting plate 2.1.1 and a connecting column 2.1.2. Figure 7 As shown, the bottom of the press plate 2.1.1 is vertically connected to the connecting column 2.1.2; the connecting column 2.1.2 is connected to the press plate 2.4 through a thread, the spring 2.2 is sleeved on the connecting column 2.1.2, the top of the spring 2.2 abuts on the press plate 2.1.1, and the bottom abuts on the inner circle of the limit column 2.7, the press plate 2.4 is located below the top of the support frame 2.3, and the press plate 2.4 moves up and down with the press table 2.1;

[0048] More specifically, the diameter of the contact portion between the pressing plate 2.1.1 of the pressing table 2.1 and the pressing head is the same as the width of the trapezoidal pressing head, thus ensuring the stability of the pressing;

[0049] Furthermore, the function of the spring 2.2 in this embodiment is mainly to enable the press-fitting table 2.1 and the press-fitting plate 2.4 to return to their original positions automatically, thereby avoiding repeated operations on the press-fitting plate, avoiding labor consumption and damage to the clamping plate under the spring. During the downward pressing process of the press, the spring 2.2 is compressed. When the press is raised, the spring 2.2 will return to its original position automatically. When the spring returns to its original position, it drives the press-fitting table 2.1 and the press-fitting plate 2.4 to move upward together. Therefore, the elastic force of the spring is greater than the gravity of the press-fitting table 2.1 and the press-fitting plate 2.4.

[0050] Furthermore, a top plate is provided on the top of the support frame 2.3 to facilitate supporting and fixing the spring, the press-fitting table and the press-fitting plate;

[0051] Furthermore, the structure of the press plate 2.4 in this embodiment is as follows: Figure 5As shown, it includes a connecting disk 2.4.1, a column 2.4.2 and a pressure plate 2.4.3; wherein, the center position of the connecting disk 2.4.1 is connected to the bottom of the above-mentioned connecting column 2.1.2 by means of threads and nuts, and this detachable connection facilitates the later replacement of the spring 2.2; the bottom of the connecting disk 2.4.1 is connected with a plurality of vertically arranged columns 2.4.2, and the columns 2.4.2 reduce the overall weight of the tooling relative to the plate, and the columns 2.4.2 at the lower part of the pressing disk are arranged in the working direction to form a set angle, so that a sufficiently large working space is reserved, which is convenient for screwing in the rubber stopper, and the columns 2.4.2 have a smooth transition; an arc-shaped pressure plate 2.4.3 is connected to the bottom of the column 2.4.2, and the pressure plate 2.4.3 can press the lower clamping plate 3 of the axle box spring to be fixed from the top; preferably, in this embodiment, the columns 2.4.2 are arranged to form an angle of 120°.

[0052] Furthermore, a layer of rubber is pasted on the bottom of the pressure plate 2.4.3 in contact with the lower clamping plate 3 of the axle box spring to avoid damage to the lower clamping plate 3 of the axle box spring;

[0053] Furthermore, the positioning plate 2.5 in the present embodiment not only reinforces the support frame, but also facilitates the operator to directly push the spring lower clamp to the tangent position. Furthermore, the bottom plate 2.6 in the present embodiment is fixed to the bottom of the support frame 2.3, and a cylindrical hole 2.6.1 is opened in the bottom plate 2.6. The size of the cylindrical hole 2.6.1 is slightly larger than the lower circular hole of the axle box spring lower clamp, which is convenient for positioning the spring lower clamp, ensuring that the press head, the press-fitting table and the spring lower clamp remain concentric, and preventing damage to the spring lower clamp.

[0054] The specific usage is as follows:

[0055] First, put the lower clamping plate 3 of the axle box spring into the clamping device, so that the lower clamping plate 3 is tangent to the positioning plate 2.5 of the clamping fixture and the lower circular hole of the lower clamping plate 3 falls into the bottom plate 2.6 of the clamping fixture. Then operate the press machine to press the press table so that the press plate 2.4 presses the lower clamping plate 3 of the axle box spring from the top, and use a torque wrench to tighten the rubber stopper in the lower clamping plate 3 of the spring. When the specified torque is reached, raise the press machine, and due to the action of the spring force, the press table and the press plate are lifted, and then the workpiece can be taken out.

[0056] In this embodiment, a suitable limit column height is set on the support frame. When the pressure head presses the pressure plate (pressing table) against the spring lower plate, a certain gap is left between the trapezoidal lower part of the pressure head and the support frame to prevent the pressure head from causing damage to the upper part of the support frame; when the pressure head rises, the pressure plate is lifted a certain distance to facilitate the withdrawal of the spring lower plate. The use of a spring structure avoids repeated operations on the pressure plate, avoids personnel consumption and damage to the spring lower plate. In addition, according to the principle of tangency of a straight line and a circle, this embodiment welds two positioning plates on the support frame, which not only reinforces the support frame, but also facilitates the operator to directly push the spring lower plate to the tangent position; at the same time, a cylindrical hole is opened in the bottom plate to facilitate the positioning of the spring lower plate, ensure that the press head, the press table and the spring lower plate remain concentric, and prevent damage to the spring lower plate.

[0057] The lower part of the press-fitting plate in this embodiment opens at an angle of 120° toward the working direction, and its working space is relatively large, which is convenient for screwing in the rubber stopper; and the transition is smooth, and a layer of rubber is pasted on the contact part between the press-fitting plate and the lower spring clamping plate to avoid damage to the lower spring clamping plate; the upper and lower connections of the press-fitting plate adopt a columnar structure, which reduces the overall weight of the tooling.

[0058] The press in this embodiment is guided by a double optical axis, so as to ensure the stability of the press during press fitting.

[0059] The pressing head of the press in this embodiment adopts a trapezoidal structure, which plays a positioning function for the press-fitting table.

[0060] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A clamping device for the lower clamping plate of an axle box spring, characterized in that: Includes press and clamping fixture; The clamping tool is located below the press, and includes a press table, a spring, a support frame, a press plate, a positioning plate, a bottom plate and a limit column; A limiting column is installed on the top of the support frame, and the bottom of the support frame is a base plate, which is used to place the lower clamp of the axle box spring with a fixing part; a positioning plate is also arranged at a position of the support frame close to the base plate; the press-fitting table includes a press-fitting plate and a connecting column, the bottom of the press-fitting plate is vertically connected to the connecting column, the connecting column is connected to the press-fitting disk, the spring is sleeved on the connecting column, the top of the spring abuts on the press-fitting plate, and the bottom abuts on the inner circle of the limiting column, the press-fitting disk is located below the top of the support frame, and the press-fitting disk moves up and down with the press-fitting table.

2. The clamping device for the lower clamping plate of the axle box spring according to claim 1, characterized in that: It also includes a positioning plate, and the positioning plate is an arc-shaped plate.

3. The clamping device for the lower clamping plate of the axle box spring according to claim 2, characterized in that: Two arc-shaped plates are provided, and are respectively located at two corner positions of the support frame.

4. The clamping device for the lower clamping plate of the axle box spring according to claim 1, characterized in that: The press-fitting disk comprises a connecting disk, a column and a pressing plate; the center position of the connecting disk is connected to the pressing platform; a plurality of columns are connected to the bottom of the connecting disk, the columns are arranged in a working direction to form a set angle, and an arc-shaped pressing plate is connected to the bottom of the columns.

5. The clamping device for the lower clamping plate of the axle box spring according to claim 4, characterized in that: A layer of rubber is pasted on the bottom of the pressure plate in contact with the lower clamping plate of the axle box spring.

6. The clamping device for the lower clamping plate of the axle box spring according to claim 1, characterized in that: The press is connected to a trapezoidal pressure head.

7. The clamping device for the lower clamping plate of the axle box spring according to claim 6, characterized in that: The gap reserved between the bottom of the trapezoidal pressing head and the top of the supporting frame is greater than the moving distance of the pressing table.

8. The clamping device for the lower clamping plate of the axle box spring according to claim 6, characterized in that: A cylindrical hole is opened on the bottom plate, and the cylindrical hole is slightly larger than the circular hole at the lower part of the lower clamping plate of the axle box spring.

9. The clamping device for the lower clamping plate of the axle box spring according to claim 6, characterized in that: The diameter of the contact part between the pressing plate of the pressing table and the trapezoidal pressing head is the same as the width of the trapezoidal pressing head.

10. The clamping device for the lower clamping plate of the axle box spring according to claim 6, characterized in that: Guide shafts are arranged on both sides of the press.

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