Connecting rod bushing press-fitting device

Abstract

The utility model relates to a connecting rod bushing press-fitting device which comprises a supporting frame, a rotating frame, a first pressing head, a second pressing head, a third pressing head, a first positioning piece, a second positioning piece, a lead screw positioning piece and a driving device, the rotating frame comprises an upper rotating disc and a lower rotating disc, and three sets of elastic moving rods capable of moving up and down are arranged on the upper rotating disc in a penetrating mode. The first pressing head, the second pressing head and the third pressing head are connected to the bottom ends of the three sets of elastic moving rods correspondingly. The driving end of the driving device is arranged above the elastic moving rod and eccentrically arranged with the rotating frame, and the driving end of the driving device can abut against the elastic moving rod rotating to the position under the driving end and drive the elastic moving rod to move downwards; and the first positioning piece, the second positioning piece and the lead screw positioning piece are coaxially arranged with the first pressing head, the second pressing head and the third pressing head up and down respectively. The two bushings can be sequentially pressed in the inner holes in the two sides of the connecting rod more efficiently, the disc spring is pre-compressed, the structure is more compact, and the occupied space is smaller.

Description

Technical Field

[0001] The utility model relates to the application field of railway locomotive vehicle foundation brake, in particular to a connecting rod bushing press-fitting device. Background Art

[0002] At present, there are about 3,500 EMUs in stock. In recent years, the output of new EMUs has been stable, and the annual growth rate of EMUs under maintenance has reached more than 20%. With the continuous development of maintenance business, the maintenance business has also been continuously expanded. At the same time, customers' requirements for the maintenance process level, quality capability, maintenance cycle, maintenance cost, and maintenance data of brake caliper units have also been continuously improved. At present, the assembly process of brake caliper units has problems such as low degree of automation, low precision, high labor intensity, and low installation efficiency.

[0003] The brake cylinder assembly includes two parts: pre-assembly and final assembly. The pre-assembly includes the cylinder body, piston, clearance adjuster, connecting rod, parking cylinder, hand release, etc. The final assembly assembles the pre-assembled parts in sequence to form a brake cylinder. During pre-assembly, it is necessary to press the yellow sleeves on both sides of the connecting rod and pre-compress the disc spring. In the prior art, the two yellow sleeves are pressed into the inner holes on both sides of the connecting rod and the disc spring is compressed. This requires the use of a press with three independent stations, which takes up a large space, is costly, and has low press-assembly efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a connecting rod bushing press-fitting device, which can more efficiently press-fit two bushings into the inner holes on both sides of the connecting rod in sequence and pre-compress the disc spring, and has a more compact structure and occupies less space.

[0005] The object of the utility model is achieved in this way. A connecting rod bushing pressing device comprises a supporting frame, a rotating frame, a first pressing head, a second pressing head, a third pressing head, a first positioning member, a second positioning member, a screw positioning member and a driving device; the rotating frame can be rotatably arranged on the supporting frame, the rotating frame comprises an upper rotating disk and a lower rotating disk arranged at intervals up and down, and three groups of elastic movable rods that can move up and down are circumferentially arranged on the upper rotating disk, and the first pressing head, the second pressing head and the third pressing head are respectively connected to the bottom ends of the three groups of elastic movable rods; the driving end of the driving device is arranged above the elastic movable rod and eccentrically arranged on the rotating frame, and the driving end of the driving device can abut against the elastic movable rod that rotates to the bottom of the driving end and drive the elastic movable rod to move downward; the first positioning member, the second positioning member and the screw positioning member are respectively coaxially arranged with the first pressing head, the second pressing head and the third pressing head, the first positioning member is used to position the first end of the connecting rod for installing the brake cylinder, the second positioning member is used to position the second end of the connecting rod for installing the brake cylinder, and the screw positioning member is used to position the screw for installing the brake cylinder.

[0006] In a preferred embodiment of the present invention, a return spring is sleeved on the elastic movable rod, and two ends of the return spring are respectively pressed against between the upper end limit portion of the elastic movable rod and the upper turntable.

[0007] In a preferred embodiment of the utility model, a linear bearing is fixedly provided on the upper turntable, the elastic movable rod is movably arranged in the linear bearing, and the lower end of the return spring abuts against the top end of the linear bearing.

[0008] In a preferred embodiment of the present invention, the screw positioning member includes a rotating adjustment cylinder and a fixed limit cylinder. The rotating adjustment cylinder is rotatably connected to the lower turntable, and the fixed limit cylinder is inserted in the rotating adjustment cylinder and fixedly connected to the lower turntable; a plurality of groups of support grooves with different heights are provided on the rotating adjustment cylinder, and two relatively long adjustment holes are provided on the lower side wall of the fixed limit cylinder, and a transverse limit rod can be inserted in the two adjustment holes and supported in the corresponding support grooves; the fixed limit cylinder is used to place the screw, and the bottom of the screw can be supported against the transverse limit rod.

[0009] In a preferred embodiment of the present invention, the lower turntable is connected to the support frame via a first bearing, and the bottom of the rotary adjustment cylinder is connected to the lower turntable via a second bearing.

[0010] In a preferred embodiment of the present invention, the upper side wall of the fixed limiting cylinder is provided with a side opening communicating with the top end thereof.

[0011] In a preferred embodiment of the present invention, the first positioning member and the second positioning member both include positioning columns, the diameter of the positioning column of the first positioning member matches the aperture of the inner hole on one side of the connecting rod, and the diameter of the positioning column of the second positioning member matches the inner diameter of the bushing inserted in the connecting rod.

[0012] In a preferred embodiment of the present invention, the bottom of the positioning column has an annular flange.

[0013] In a preferred embodiment of the present invention, the first pressure head and the second pressure head both include a cylindrical pressure block and a cylindrical guide block connected up and down, and the diameter of the cylindrical guide block is smaller than the diameter of the cylindrical pressure block; the third pressure head is a flat pressure head.

[0014] In a preferred embodiment of the present invention, the driving device is a cylinder, the piston rod of the cylinder is vertically arranged and the bottom end of the piston rod constitutes the driving end.

[0015] As described above, the connecting rod bushing pressing device of the utility model can be applied to the existing brake caliper unit products of railway locomotives and vehicles. By integrating the three pressing stations for pressing two bushings and pre-compressing disc springs into one device, the three pressing heads are integrated together to form a rotating three-column pressing head. The next pressing head can be replaced by rotating the rotating frame. The three pressing operations can be performed in sequence. The bushings on both sides of the connecting rod can be pressed in sequence and the disc springs can be pre-compressed. It has a higher degree of integration, occupies less space, has more compact stations, has high pressing efficiency, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 : A three-dimensional diagram of the connecting rod bushing press-fitting device provided by the utility model.

[0018] Figure 2 :for Figure 1 A partial enlarged view of .

[0019] Figure 3 : It is a front view of the connecting rod bushing press-fitting device provided by the utility model.

[0020] Figure 4 : It is a schematic diagram of the connecting rod bushing press-fitting device provided by the utility model after the connecting rod is installed.

[0021] Figure 5 : It is a front view of the connecting rod bushing press-fitting device provided by the utility model after the connecting rod is installed.

[0022] Description of Figure Numbers:

[0023] 1. Support frame;

[0024] 2. Rotating frame; 21. Upper turntable; 22. Lower turntable; 23. Center column;

[0025] 3. Elastic moving rod; 31. Return spring; 32. Upper end limiter; 33. Linear bearing;

[0026] 41. first pressure head; 42. second pressure head; 43. third pressure head; 44. cylindrical pressure block; 45. cylindrical guide block;

[0027] 51. first positioning member; 52. second positioning member; 53. positioning column; 54. flange;

[0028] 6. Screw positioning member; 61. Rotating adjustment cylinder; 611. Support groove; 62. Fixed limiting cylinder; 621. Adjustment hole; 63. Horizontal limiting rod;

[0029] 7. driving device; 71. driving end;

[0030] 8. Connecting rod components; 81. Connecting rod; 82. Pressure cover; 821. Reset nut; 83. Lead screw. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0032] like Figures 1 to 5 As shown, this embodiment provides a connecting rod bushing press-fitting device, including a support frame 1, a rotating frame 2, a first pressing head 41, a second pressing head 42, a third pressing head 43, a first positioning member 51, a second positioning member 52, a screw positioning member 6 and a driving device 7; the rotating frame 2 is rotatably arranged on the support frame 1, and the rotating frame 2 includes an upper turntable 21 and a lower turntable 22 arranged at intervals in the upper and lower directions (the upper turntable 21 and the lower turntable 22 are fixedly connected by a center column 23), and three groups of elastic movable rods 3 that can move up and down are circumferentially spaced on the upper turntable 21, and the first pressing head 41, the second pressing head 42 and the third pressing head 43 are respectively connected to the bottom ends of the three groups of elastic movable rods 3.

[0033] The driving end 71 of the driving device 7 is arranged above the elastic movable rod 3 and is eccentrically arranged with the rotating frame 2. The driving end 71 of the driving device 7 can abut against the elastic movable rod 3 rotated to the bottom of the driving end 71 and drive the elastic movable rod 3 to move downward; the first positioning member 51, the second positioning member 52 and the screw positioning member 6 are respectively coaxially arranged with the first pressure head 41, the second pressure head 42 and the third pressure head 43, the first positioning member 51 is used to position the first end of the connecting rod 81 for installing the brake cylinder, the second positioning member 52 is used to position the second end of the connecting rod 81 for installing the brake cylinder, and the screw positioning member 6 is used to position the screw 83 for installing the brake cylinder.

[0034] The connecting rod 81 in the brake cylinder is mainly used to connect with the lead screw 83 to transmit the braking force. The structure of the connecting rod 81 is the existing structure, and its left and right sides are symmetrical. The inner holes on the left and right sides are used to install two yellow sleeves, which are also bushings. They are wear-resistant bushings that can protect the connecting rod 81. The structure of the bushing is also the existing structure, which is a cylindrical structure with openings at both ends, and the outer wall of one end has a convex ring with an increased diameter. The brake cylinder mentioned in this article is an air brake.

[0035] The connecting rod bushing press-fitting device is mainly used to press-fit the bushings on both sides of the connecting rod 81 in sequence and pre-compress the disc spring. The press-fitting device has three pressing heads, which can first press-fit one of the bushings into the inner hole on one side of the connecting rod 81, and then press-fit the other bushing into the inner hole on the other side of the connecting rod 81; after the disc spring is manually placed in the annular groove of the connecting rod 81 and covered with a pressure cover 82, the device can press the pressure cover 82 down to pre-compress the disc spring so that a temporary pin can be manually inserted; the pressure cover 82 has a hexagonal nut structure (i.e., a reset nut 821), and a socket is provided on the side wall of the reset nut 821, and a corresponding socket is provided on the end side wall of the lead screw 83. The temporary pin can be inserted into the through hole of the hexagonal nut structure and the socket of the lead screw 83 to fix the pressure cover 82 to the lead screw 83. The connecting rod 81, two bushings, disc springs, pressure cover 82 and lead screw 83 form a connecting rod assembly 8 after the connection is completed. The specific installation process is:

[0036] The connecting rod 81 is installed on the first positioning member 51 with the axis being horizontal, the rotating frame 2 is rotated until the first pressing head 41 is facing the driving end 71 of the driving device 7, and one of the bushings is placed in the corresponding inner hole of the connecting rod 81; the driving device 7 can drive the first pressing head 41 to press down the bushing by pressing down the corresponding elastic movable rod 3, so as to press the bushing into the inner hole on one side of the connecting rod 81.

[0037] Then the connecting rod 81 is flipped 180 degrees and installed on the second positioning member 52, the rotating frame 2 is rotated until the second pressing head 42 is facing the driving end 71 of the driving device 7, and the other bushing is placed in the corresponding inner hole of the connecting rod 81; the driving device 7 can drive the second pressing head 42 to press down the bushing by pressing down the corresponding elastic movable rod 3, so as to press the bushing into the inner hole on the other side of the connecting rod 81.

[0038] Then, the lead screw 83 is installed on the lead screw positioning member 6, and the rotating frame 2 is rotated until the third pressure head 43 is facing the driving end 71 of the driving device 7. The connecting rod 81 is placed in a vertical position according to the axis, and the disc spring is manually taken and placed in the annular groove of the connecting rod 81. The pressure cover 82 is covered, and the connecting rod 81 is sleeved on the lead screw 83. At this time, the end of the lead screw 83 passes through the center hole of the connecting rod 81, the inner hole of the disc spring, and the inner hole of the pressure cover 82 in sequence and passes out; the driving device 7 can drive the third pressure head 43 to press the pressure cover 82 by pressing the corresponding elastic moving rod 3 downward to achieve pre-compression of the disc spring. Then, a temporary pin is manually inserted into the pressure cover 82 and the lead screw 83, and the holes of the pressure cover 82 and the lead screw 83 for passing the elastic pin are aligned, and the pressure cover 82 and the lead screw 83 are temporarily fixed to complete the temporary assembly of the connecting rod assembly 8.

[0039] Therefore, the connecting rod bushing pressing device in this embodiment can be applied to the existing brake caliper unit products of railway locomotives and vehicles. By integrating the three pressing stations for pressing two bushings and pre-compressing disc springs into one device, the three pressing heads are integrated together to form a rotating three-column pressing head. The next pressing head can be replaced by rotating the rotating frame 2. The three pressing operations can be performed in sequence. The bushings on both sides of the connecting rod 81 can be pressed in sequence and the disc springs can be pre-compressed. It has a higher degree of integration, occupies less space, has more compact stations, has high pressing efficiency, and improves work efficiency.

[0040] In a specific implementation, in order to facilitate the movement and reset of the elastic movable rod 3, refer to Figure 3 A return spring 31 is sleeved on the elastic moving rod 3, and two ends of the return spring 31 are respectively pressed between the upper end limit portion 32 of the elastic moving rod 3 and the upper turntable 21.

[0041] In the initial state, the elastic movable rod 3 relies on gravity to make the return spring 31 in a slightly compressed state. When the driving device 7 presses down the elastic movable rod 3, the return spring 31 is further compressed. When the driving end 71 of the driving device 7 moves up and no longer presses down the elastic movable rod 3, the elastic movable rod 3 will move up to the initial position under the action of the return spring 31.

[0042] Generally, a linear bearing 33 is fixedly provided on the upper turntable 21, and the elastic movable rod 3 can be movably inserted into the linear bearing 33, and the lower end of the return spring 31 abuts against the top of the linear bearing 33; the linear shaft can play a guiding and protective role.

[0043] In order to make the device compatible with screws 83 of different lengths, refer to Figure 1 and Figure 2 The screw positioning member 6 includes a rotating adjustment cylinder 61 and a fixed limiting cylinder 62. The rotating adjustment cylinder 61 is rotatably connected to the lower turntable 22, and the fixed limiting cylinder 62 is inserted in the rotating adjustment cylinder 61 and fixedly connected to the lower turntable 22; a plurality of groups of support grooves 611 with different heights are provided on the rotating adjustment cylinder 61, and two long strip-shaped adjustment holes 621 arranged opposite to each other are provided on the lower side wall of the fixed limiting cylinder 62. The transverse limiting rod 63 can be inserted in the two adjustment holes 621 and supported in the corresponding supporting grooves 611. The fixed limiting cylinder 62 is used to place the screw 83, and the bottom of the screw 83 can be supported against the transverse limiting rod 63.

[0044] The lower turntable 22 can be connected to the support frame 1 through a first bearing and can be rotated manually. The bottom of the rotation adjustment cylinder 61 can be connected to the lower turntable 22 through a second bearing and can be rotated manually.

[0045] The rotation adjustment cylinder 61 is a cylindrical structure with an open top, and a plurality of groups of support grooves 611 are provided on the top thereof, and each group of support grooves 611 includes two support grooves 611 symmetrically arranged relative to the center of the rotation adjustment cylinder 61, and the corresponding positions of each group of support grooves 611 are at different heights; by supporting the transverse limit rods 63 on different support grooves 611, screws 83 of different lengths can be matched. In the prior art, in order to match screws 83 of different lengths, different positioning members can only be replaced. In this embodiment, a plurality of groups of support sleeves of different heights are integrated on the rotation adjustment cylinder 61, and only the position of the transverse limit rod 63 needs to be adjusted, which is simple and convenient, and has stronger adaptability.

[0046] Generally, a side opening connected to the top of the fixed limiting cylinder 62 is provided on the upper side wall thereof, so that the lead screw 83 can be placed more conveniently.

[0047] The first positioning member 51 and the second positioning member 52 are both fixed on the lower turntable 22, and both include positioning posts 53. The diameter of the positioning post 53 of the first positioning member 51 should match the diameter of the inner hole on one side of the connecting rod 81, and the diameter of the positioning post 53 of the second positioning member 52 should match the inner diameter of the bushing inserted in the inner hole on the other side of the connecting rod 81. The bottom of the positioning post 53 has an annular flange 54 for supporting the corresponding side end surface of the connecting rod 81 during the pressing process.

[0048] The first pressing head 41 and the second pressing head 42 each include a cylindrical pressing block 44 and a cylindrical guide block 45 connected up and down, and the diameter of the cylindrical guide block 45 is smaller than the diameter of the cylindrical pressing block 44. The cylindrical guide block 45 is used to be inserted into the corresponding side inner hole of the connecting rod 81 or the inner hole of the installed bushing to play a guiding role; the bottom surface of the cylindrical pressing block 44 can be pressed against the end surface of the bushing during the downward pressing process and press the bushing downward.

[0049] The third pressure head 43 mentioned above can be a flat pressure head, which abuts against the top surface of the reset nut 821 of the pressure cover 82 when pressed down. After being pressed into place, the temporary pin is inserted into the reset nut 821 and the screw 83 while maintaining the downward pressure.

[0050] The driving device 7 can be, for example, a cylinder, the piston rod of which is vertically arranged and the bottom end of which constitutes the driving end 71. A switch is also provided on the support frame 1, and the switch is used to control the action of the cylinder. The switch can be, for example, a hand valve, and the operator can manually operate the hand valve to control the cylinder to move upward or downward.

[0051] The above is only an illustrative embodiment of the utility model, and is not intended to limit the scope of the utility model. Any equivalent changes and modifications made by any technician in the field without departing from the concept and principle of the utility model should fall within the scope of protection of the utility model.

Claims

1. A connecting rod bushing press-fitting device, characterized in that: It includes a support frame, a rotating frame, a first pressing head, a second pressing head, a third pressing head, a first positioning member, a second positioning member, a lead screw positioning member and a driving device; The swivel frame can be rotatably arranged on the support frame, and the swivel frame includes an upper turntable and a lower turntable arranged at intervals up and down, and three groups of elastic movable rods that can move up and down are circumferentially arranged on the upper turntable, and the first pressure head, the second pressure head and the third pressure head are respectively connected to the bottom ends of the three groups of elastic movable rods; the driving end of the driving device is arranged above the elastic movable rod and is eccentrically arranged on the swivel frame, and the driving end of the driving device can abut against the elastic movable rod rotated to the bottom of the driving end and drive the elastic movable rod to move downward; the first positioning member, the second positioning member and the screw positioning member are respectively coaxially arranged with the first pressure head, the second pressure head and the third pressure head, the first positioning member is used to position the first end of the connecting rod for installing the brake cylinder, the second positioning member is used to position the second end of the connecting rod for installing the brake cylinder, and the screw positioning member is used to position the screw for installing the brake cylinder.

2. The connecting rod bushing press-fitting device according to claim 1, characterized in that: A return spring is sleeved on the elastic moving rod, and two ends of the return spring are respectively pressed against between the upper end limit portion of the elastic moving rod and the upper rotating disk.

3. The connecting rod bushing press-fitting device according to claim 2, characterized in that: A linear bearing is also fixedly arranged on the upper turntable, the elastic movable rod is movably arranged in the linear bearing, and the lower end of the reset spring abuts against the top end of the linear bearing.

4. The connecting rod bushing press-fitting device according to claim 1, characterized in that: The screw positioning member includes a rotation adjustment cylinder and a fixed limit cylinder, the rotation adjustment cylinder is rotatably connected to the lower turntable, the fixed limit cylinder is inserted in the rotation adjustment cylinder and is fixedly connected to the lower turntable; a plurality of groups of support grooves with different heights are provided on the rotation adjustment cylinder, and two elongated adjustment holes arranged opposite to each other are provided on the lower side wall of the fixed limit cylinder, the transverse limit rod can be inserted in the two adjustment holes and supported in the corresponding support grooves, the fixed limit cylinder is used to place the screw, and the bottom of the screw can be supported against the transverse limit rod.

5. The connecting rod bushing press-fitting device according to claim 4, characterized in that: The lower turntable is connected to the support frame via a first bearing, and the bottom of the rotation adjustment cylinder is connected to the lower turntable via a second bearing.

6. The connecting rod bushing press-fitting device according to claim 4, characterized in that: The upper side wall of the fixed limiting cylinder is provided with a side opening communicating with the top end thereof.

7. The connecting rod bushing press-fitting device according to claim 1, characterized in that: The first positioning member and the second positioning member both include positioning columns, the diameter of the positioning column of the first positioning member matches the aperture of the inner hole on one side of the connecting rod, and the diameter of the positioning column of the second positioning member matches the inner diameter of the bushing inserted in the connecting rod.

8. The connecting rod bushing press-fitting device according to claim 7, characterized in that: The bottom of the positioning column is provided with an annular flange.

9. The connecting rod bushing press-fitting device according to claim 1, characterized in that: The first pressing head and the second pressing head both include a cylindrical pressing block and a cylindrical guiding block connected up and down, and the diameter of the cylindrical guiding block is smaller than the diameter of the cylindrical pressing block; the third pressing head is a flat pressing head.

10. The connecting rod bushing press-fitting device according to claim 1, characterized in that: The driving device is a cylinder, the piston rod of the cylinder is vertically arranged and the bottom end of the piston rod constitutes the driving end.

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