Axle box clamping hoop bolt tightening device

Abstract

The utility model relates to an axle box clamping hoop bolt tightening device which comprises a machine frame, a plurality of supporting guide rods, a plurality of clamping bolts and a plurality of clamping bolts, wherein a base plate of the machine frame is fixedly provided with a plurality of supporting guide rods; the loading plate is arranged at the top of the supporting guide rod and is arranged in the horizontal plane, and a plate body is provided with a left hole and a right hole which are opposite to each other and is provided with variable-pitch cylinders correspondingly matched with the holes; the lifting air cylinder can drive the loading plate to do lifting movement in the vertical direction relative to the base plate. The tightening shaft group comprises four tightening shafts, every two tightening shafts form a group, and each group of tightening shafts are correspondingly matched with the two holes respectively; the tightening shaft comprises a servo motor, a transmission unit, a shell, a pulling shaft and a pulling sleeve fixed to the upper end of the pulling shaft. The servo motor can drive the wrench shaft to rotate around the vertical axis. The shell and the hole are matched through a linear sliding rail structure, and the two variable-pitch air cylinders can drive the two tightening shafts in groups to move in the front-back direction. According to the device, the assembly efficiency of the bolt tightening operation of the axle box clamping hoop is improved, and the labor cost is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening of axle box clamping hoop bolts of train bogies, and particularly relates to a tightening device for axle box clamping hoop bolts. Background Art

[0002] With the rapid development of the high-speed EMU industry, product quality and safety have become an important prerequisite for the development of enterprises. As a key component of the EMU bogie, the assembly quality control of the axle box clamping hoop is particularly important. At present, major manufacturers basically follow the manual assembly mode introduced in the early stage during the assembly process of the axle box clamping hoop, that is, the operator uses a "click" wrench for manual tightening, and then checks and confirms the assembly quality through self-inspection + mutual inspection. There are problems of large investment in manpower and low assembly efficiency. Content of the Utility Model

[0003] In order to improve the assembly efficiency of the operation of tightening the axle box clamping hoop bolts, the utility model provides a tightening device for axle box clamping hoop bolts.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a tightening device for axle box clamping hoop bolts, comprising:

[0005] A frame, including a base plate equipped with a walking wheel assembly; a plurality of support guide rods are fixedly arranged on the upper end surface of the base plate;

[0006] A loading plate, fixed at the top of the support guide rods and arranged in a horizontal plane; two opposite left and right shaped holes are provided on the plate body of the loading plate; the shaped holes are rectangular and the length direction of the shaped holes is along the front-rear direction; a variable pitch cylinder corresponding to the shaped holes is provided on the loading plate;

[0007] A lifting cylinder, the cylinder body of which is fixedly connected to the base plate, and the free end of the cylinder rod is fixedly connected to the loading plate, so that the lifting cylinder can drive the loading plate to move up and down relative to the base plate in the vertical direction;

[0008] A tightening shaft group, including four tightening shafts in pairs, and each group of tightening shafts respectively corresponds to and matches two shaped holes; each tightening shaft includes a servo motor, a transmission unit, a housing, a wrench shaft and a wrench sleeve fixed at the upper end of the wrench shaft; after the lower end of the wrench shaft is matched with the housing, it can be associated and matched with the transmission unit fixedly connected to the housing, so that the servo motor can drive the wrench shaft to rotate around the vertical axis through the transmission unit; the housing and the shaped hole are matched through a linear slide rail structure, and the variable pitch cylinder can respectively drive two tightening shafts in a group to move in the front-rear direction, so that while the two tightening shafts in one group move closer, the two tightening shafts in the other group move away.

[0009] In the initial state, the axial center line spacing between the wrench sleeves of the two tightening shafts in one group is greater than the axial center line spacing between the wrench sleeves of the two tightening shafts in the other group. Next, when the two variable-spacing cylinders drive the two groups of tightening shafts to move relative to the loading plate respectively, the side with the larger axial center line spacing between the wrench sleeves makes a approaching movement to achieve the purpose of reducing the axial center distance between the wrench sleeves. At the same time, the side with the smaller axial center line spacing between the wrench sleeves makes a moving-away movement to achieve the purpose of increasing the axial center distance between the wrench sleeves.

[0010] After the housing on the tightening shaft and the loading plate are matched through the linear slide rail structure, when the lifting cylinder drives the loading plate to move up and down, the loading plate can carry the four tightening shafts to make synchronous up and down movement actions.

[0011] The lifting cylinder, variable-spacing cylinder, servo motor, etc. are all connected to the control box to enable the lifting cylinder to drive the loading plate to make up and down movements relative to the base plate, the variable-spacing cylinder to drive the two tightening shafts in a group to slide relative to the die holes in the front and back directions respectively and the relative movements of the two groups of tightening shafts in the front and back directions to be opposite, and the four servo motors to drive the wrench sleeves on the four tightening shafts to rotate simultaneously. After the nuts matched on the four bolts are respectively inserted into the prism holes of the four wrench sleeves, the four wrench sleeves make rotating movements simultaneously to achieve the purpose of tightening the nuts on the four bolts simultaneously.

[0012] Optionally, directly below the two die holes, two rectangular through holes are formed on the base plate and a cuboid-shaped shield is provided at the lower port of the rectangular through hole. When the two tightening shafts in the same group make up and down movements with the loading plate, the servo motors provided at the lower part of the tightening shafts can all move downward and extend into the shield and move upward and move out of the shield.

[0013] Optionally, the transmission unit includes a matched planetary reducer and gear box. The servo motor is matched with the input end of the planetary reducer, and the output end of the gear box is matched with the wrench shaft.

[0014] Optionally, a torque sensor matched with the wrench shaft is installed on the housing. The torque sensor can be associated with the servo motor to control the tightening torque of the wrench shaft acting on the bolt.

[0015] Optionally, it further includes a pair of anti-rotation toolings. The axial center line spacing between the two sleeves on one anti-rotation tooling is greater than the axial center line spacing between the two sleeves on the other anti-rotation tooling, and the axial center line spacing between the sleeves on the two anti-rotation toolings respectively corresponds to the two stroke spacings between the two wrench sleeves on the tightening shafts in a group.

[0016] Optionally, the wheels in the walking wheel assembly are universal wheels.

[0017] The beneficial effects of the present utility model are: This patent helps to improve the assembly efficiency of the tightening operation of the axle box clamping hoop bolts and significantly reduces the labor cost. Brief Description of the Drawings

[0018] Figure 1 、 Figure 2 is a three-dimensional structural schematic diagram of this patent.

[0019] Figure 3 is a three-dimensional structural schematic diagram when the tightening shaft, lifting cylinder, and pitch-changing cylinder are installed on the loading plate.

[0020] Figure 4 is a three-dimensional structural schematic diagram of the tightening shaft.

[0021] Figure 5 is a three-dimensional structural schematic diagram of the anti-rotation tooling.

[0022] Figure 6 is a schematic diagram of the state of the layout direction of the bolt spacing positions of the axle box clamping hoop.

[0023] In the figure: 100 anti-rotation tooling, 101 handle rod, 102 sleeve one, 103 sleeve two, 104 intermediate support plate;

[0024] 200 layout direction of the bolt spacing positions of the first axle box clamping hoop, 300 layout direction of the bolt spacing positions of the second axle box clamping hoop;

[0025] 10 frame, 11 base plate, 111 U-shaped frame, 112 handle, 12 wheels, 13 rectangular through hole, 14 protective cover, 15 support guide rod; 20 loading plate, 21 shaped hole;

[0026] 30 lifting cylinder; 40 tightening shaft, 41 servo motor, 42 planetary reducer, 43 gear box, 44 torque sensor, 45 housing, 451 pitch-changing cylinder, 46 wrench shaft, 47 wrench sleeve;

[0027] 50 control box; 60 liquid crystal display screen; 70 operation box; 80 alarm lamp; 90 operation handle. Detailed Description of the Preferred Embodiment

[0028] The structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have any technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0029] As Figures 1 to 6 shown, a tightening device for the bolts of an axle box clamping hoop includes a frame 10, a loading plate 20, a lifting cylinder 30, a tightening shaft group, a control box 50, a liquid crystal display screen 60, an operation box 70, an alarm lamp 80 and an operation handle 90:

[0030] The frame 10 includes a base plate 11 equipped with a walking wheel assembly. The wheels 12 of the walking wheel assembly are selected as universal wheels to increase the flexibility of the overall movement of the device. On the plate body of the base plate 11, there are two rectangular through holes 13 opposite to each other left and right, and the length of the rectangular through holes 13 is along the front-back direction. On the lower end surface of the base plate 11, a protective cover 14 is provided corresponding to the lower ports of the rectangular through holes 13. The protective cover 14 is in the shape of a cuboid and the arrangement direction is the same as that of the rectangular through holes 13.

[0031] On the base plate 11, a U-shaped frame 111 is also fixedly provided, and the cross beam of the U-shaped frame 111 faces upward and a handle 112 is fixedly provided on the cross beam. The control box 50 is fixed between the vertical arms of the U-shaped frame 111. The liquid crystal display screen 60 is fixed on the upper part of the control box 50, the operation box 70 is fixed on the housing of the liquid crystal display screen 60, and the alarm 80 is fixed on the upper part of the housing of the liquid crystal display screen 60. The operation handle 90 is fixed on the upper part of the control box 50.

[0032] When a fault or error occurs during the tightening process, the alarm 80 will send an alarm message and at the same time display and record the self-diagnosis result to facilitate timely handling by maintenance personnel. The tightening curve, tightening result and data of the tightening process can be immediately displayed on the display screen, and can be immediately printed on a printer and stored in a memory card and / or the cloud in a timely manner.

[0033] On the upper end surface of the base plate 11, four support guide rods 15 are fixedly provided.

[0034] The four corner positions of the loading plate 20 are respectively fixedly connected to the tops of the support guide rods 15, and the loading plate 20 is arranged in a horizontal plane. On the plate body of the loading plate 20, there are two shaped holes 21 opposite to each other left and right. The shaped holes 21 are rectangular and the length direction of the shaped holes 21 is along the front-back direction. After assembly, the shaped holes 21 on the bearing plate 20 are vertically opposite to the rectangular through holes 13 on the base plate 11.

[0035] On the lower end surface of the loading plate 20, two variable pitch cylinders 451 respectively corresponding to and matching the two shaped holes 21 are provided. As shown in the figure, both variable pitch cylinders 451 are arranged at the inner side positions of their respective corresponding shaped holes 21.

[0036] The lifting cylinder 30 includes a cylinder block and a cylinder rod. Among them, the lower end of the cylinder block is fixedly connected to the base plate 11, and the free end (upper end) of the cylinder rod is fixedly connected to the loading plate 20, so that the lifting cylinder 30 can drive the loading plate 20 to move up and down relative to the base plate 11 in the vertical direction. During this period, the support guide rod 15 can form constraints on the lowest and highest positions of the lifting movement of the loading plate 20, and can constrain the loading plate 20 to move up and down linearly.

[0037] The tightening shaft group includes four tightening shafts 40, and the four tightening shafts 40 are grouped in pairs, and each pair of tightening shafts 40 is respectively correspondingly matched with two type holes 21.

[0038] The tightening shaft 40 includes a servo motor 41, a planetary reducer 42, a gear box 43, a torque sensor 44, a housing 45, a wrench shaft 46 and a wrench sleeve 47. The planetary reducer 42 and the gear box 43 constitute a transmission unit. The wrench sleeve 47 is fixed to the upper end of the wrench shaft 46, or the wrench sleeve 47 and the wrench shaft 46 are of an integrally formed structure. After the lower end of the wrench shaft 46 is matched with the housing 45, it can be associated and matched with the transmission unit fixed to the housing 45, so that the servo motor 41 can drive the wrench shaft 46 to rotate around the vertical axis through the transmission unit. The housing 45 is matched with the type hole 21 through a linear slide rail structure, and the variable pitch cylinder 451 can respectively drive two tightening shafts 40 in a group to move in the front-rear direction, so that while two tightening shafts 40 in one group make relative approaching movements, two tightening shafts 40 in the other group make relative separating movements. The axial center line spacing between the wrench sleeves 47 on the two groups of tightening shafts 40 can respectively adapt to the different two bolt spacings on the left and right sides of the axle box clamping hoop, that is, respectively adapt to Figure 6 L1 and L2 in

[0039] Because in on-site operations, there are two arrangement directions for the bolt spacing of the axle box clamping hoop as shown in Figure 6 That is, the bolt spacing position arrangement direction 200 of the first axle box clamping hoop on the left side and the bolt spacing position arrangement direction 300 of the second axle box clamping hoop on the right side. In order to quickly adapt the spacing between the wrench sleeves 47 in the two groups of tightening shafts 40 to the two arrangement directions, the variable pitch cylinder 451 is set to adjust the tightening shafts 40 in the same group to move in the front-rear direction, and two stroke spacing positions respectively adapted to the sizes of L1 and L2 are given.

[0040] In the initial state, the axial center line spacing between the wrench sleeves 47 of the two tightening shafts 40 in one group is L1, and the axial center line spacing between the wrench sleeves 47 of the two tightening shafts 40 in the other group is L2. Next, when the two variable-spacing cylinders 451 drive the two groups of tightening shafts 40 to move relative to the loading plate 20 respectively, the side with the axial center line spacing of L2 between the wrench sleeves 47 makes a relative approaching movement in the front-back direction to achieve the purpose of changing the axial center distance between the wrench sleeves 47 to L1. At the same time, the side with the axial center line spacing of L1 between the wrench sleeves 47 makes a relative moving-away movement in the front-back direction to achieve the purpose of changing the axial center distance between the wrench sleeves 47 to L2. It is always ensured that in the two groups of tightening shafts 40, the axial center line spacing between the two wrench sleeves 47 in one group is L1, and the axial center line spacing between the two wrench sleeves 47 in the other group is L2.

[0041] After the housing 45 on the tightening shaft 40 is matched with the loading plate 20 through a linear slide rail structure, when the lifting cylinder 30 drives the loading plate 20 to move up and down, the loading plate 20 can carry the four tightening shafts 40 to move up and down synchronously.

[0042] The lifting cylinder 30, the variable-spacing cylinder 451, the servo motor 41, etc. are all connected to the control box 50 to achieve that the lifting cylinder 30 can drive the loading plate 20 to make a lifting movement relative to the base plate 11, the variable-spacing cylinder 451 can drive the two tightening shafts 40 in a group to slide relative to the die holes 21 in the front-back direction and the relative moving directions of the two groups of tightening shafts 40 in the front-back direction are opposite, and the four servo motors 41 can drive the wrench sleeves 47 on the four tightening shafts 40 to rotate simultaneously. After the nuts matching on the four bolts are respectively inserted into the prism holes of the four wrench sleeves 47, the four wrench sleeves 47 make a rotating movement simultaneously to achieve the purpose of tightening the nuts on the four bolts simultaneously.

[0043] When the two tightening shafts 40 in the same group move up and down with the loading plate 20, the servo motors 41 arranged at the lower part of the tightening shafts 40 can all move downward and extend into the protective cover 14 and move upward and move out of the protective cover 14. The protective cover 14 can play a role in protecting the servo motor 41 and can prevent the device from being collided when transferring the operation position during the use process.

[0044] The servo motor 41 is matched with the input end of the planetary speed reducer 42, and the output end of the gear box 43 is matched with the wrench shaft 46.

[0045] A torque sensor 44 matching the wrench shaft 46 is installed on the housing 45. The torque sensor 44 can be associated with the servo motor 41 to control the tightening torque exerted by the wrench shaft 46 on the bolt (or the nut matching the bolt). In each step of the tightening process, it can be arbitrarily programmed through the control box 50, so the tightening speed can be changed by programming during the tightening process (stepless speed change). The closed-loop control is achieved through the torque sensor 44, which helps to achieve precise control of the tightening torque.

[0046] Through program editing, when any tightening shaft 40 completes a certain tightening step, it will wait for other shafts to complete this step before starting the next step together, so as to keep the four tightening shafts 40 synchronized.

[0047] For convenient operation, it also includes a pair of anti-rotation toolings 100. The axial center line distance between two sleeves on one anti-rotation tooling 100 is greater than the axial center line distance between two sleeves on the other anti-rotation tooling, and the axial center line distances between the sleeves on the two anti-rotation toolings 100 respectively correspond to the two stroke distances between the two wrench sleeves 47 on the grouped tightening shafts 40. That is, the axial center line distance between sleeve one 102 and sleeve two 103 on the two anti-rotation toolings 100 used is L1 for one and L2 for the other.

[0048] An intermediate support plate 104 is provided between the sleeve one 102 and the sleeve two 103 to increase the connection rigidity between the two sleeves. A handle rod 101 is also provided on the body of the anti-rotation tooling 100 to facilitate operation.

[0049] The bolt tightening device for the axle box clamping hoop involved in this patent is designed in the form of a trolley, which has the advantages of convenient movement, labor saving and flexibility. The tightening control unit in the control box 50 is composed of a tightening controller, a PLC and a station integrated machine, and is integrated into a station control unit. The tightening shaft 40 has forward and reverse functions, and the rotation direction can be conveniently changed by editing the tightening degree. The sleeve of the wrench sleeve 47 can automatically enter and exit, that is, through a preset cap recognition program, the sleeve can be conveniently sleeved on and off the bolt or nut.

[0050] The above embodiments are only illustrative of the principles and effects of the present invention, rather than limiting the present invention. There are many aspects of the present invention that can be improved without departing from the overall idea. For those familiar with this technology, without departing from the spirit and scope of the present invention, the above embodiments can be modified or changed. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A device for tightening axle box clamping bolts, characterized in that: include: The frame includes a base plate on which a travel wheel assembly is installed; a plurality of support guide rods are fixedly provided on the upper end surface of the base plate; The loading plate is arranged on the top of the supporting guide rod and in a horizontal plane; two left and right opposite holes are arranged on the plate body of the loading plate; the holes are rectangular and the length direction of the holes is along the front-back direction; a variable pitch cylinder corresponding to the holes is arranged on the loading plate; A lifting cylinder, wherein the cylinder body is fixedly connected to the base plate, and the free end of the cylinder rod is fixedly connected to the loading plate, so that the lifting cylinder can drive the loading plate to move up and down relative to the base plate in a vertical direction; The tightening shaft group includes four tightening shafts in groups of two, and each group of tightening shafts is matched with two molded holes respectively; the tightening shaft includes a servo motor, a transmission unit, a housing, a lever shaft and a lever sleeve fixed on the upper end of the lever shaft; after the lower end of the lever shaft is matched with the housing, it can be associated with the transmission unit fixed on the housing, so that the servo motor can drive the lever shaft to rotate around the vertical axis through the transmission unit; the housing and the molded holes are matched through a linear slide rail structure, and two variable pitch cylinders can respectively drive the two tightening shafts in the group to move in the front and rear directions, and while the two tightening shafts in one group are relatively approaching, the two tightening shafts in the other group are relatively moving away; so that the two lever sleeves of each group of tightening shafts can stay at two stroke spacing positions.

2. The axle box clamping bolt tightening device according to claim 1 is characterized in that: Correspondingly, two rectangular through holes are formed on the base plate directly below the two mold holes, and a rectangular shield is provided at the lower end of the rectangular through hole; when the two tightening shafts in the same group are moved up and down, the servo motors provided at the lower part of the tightening shafts can move downward to extend into the shield and move upward to move out of the shield.

3. The axle box clamping bolt tightening device according to claim 1 or 2, characterized in that: The transmission unit includes a matching planetary reducer and a gear box; the servo motor matches the input end of the planetary reducer, and the output end of the gear box matches the pull shaft.

4. The axle box clamping bolt tightening device according to claim 3 is characterized in that: A torque sensor matching the pull shaft is installed on the housing; the torque sensor can be associated with the servo motor to control the tightening torque of the pull shaft on the bolt.

5. The axle box clamping bolt tightening device according to claim 1 is characterized in that: It also includes a pair of anti-rotation tools, wherein the axial centerline spacing between the two sleeves on one anti-rotation tool is greater than the axial centerline spacing between the two sleeves on the other anti-rotation tool, and the axial centerline spacing between the sleeves on the two anti-rotation tools corresponds to the two travel spacing positions between the two wrenches on the grouped tightening shaft.

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