Intelligent auxiliary device for assembling railway wagon brake valve

Abstract

The intelligent auxiliary device for assembling the railway wagon brake valve comprises a working table which comprises a supporting seat, the front end of the working table is connected with an overturning operation table, the top face of the overturning operation table is connected with the brake valve, and all working faces of the brake valve can be driven to rotate upwards in sequence; the fastening assembly is connected to the supporting base through a mechanical arm, is located above the overturning operation table and comprises a rotary driving device, a torque sensor and a bolt fastening piece which are sequentially connected from top to bottom; the mechanical arm is used for driving the fastening assembly to move to a bolt of the brake valve above the overturning operation table; and the electric control system is in communication connection with the overturning operation table, the mechanical arm and the torque sensor. According to the brake valve, the sequence and the torque of tightening operation of each working face of the brake valve and bolts on each working face can be controlled, so that the assembly of the brake valve is more practical and controllable, and the conditions of missing tightening, wrong tightening, too small pre-tightening force and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for assembling a brake valve of a railway freight car, in particular to an intelligent auxiliary device for assembling a brake valve of a railway freight car. Background Art

[0002] With the continuous development of railway freight cars, the braking system has always been the core component of railway freight cars, especially the inspection and maintenance of brake valves, from external cleaning to component disassembly, from brake valve component inspection to overall assembly and performance inspection of brake valves. The requirements of each process reflect the high attention paid to the core components of the braking system. In this inspection and maintenance process, the overall assembly of the brake valve is a key process that carries the performance effects of each piston and component of the brake valve, and the preload of the assembly bolts directly affects the overall performance of the brake valve. If the preload does not meet the standard, the bolts will loosen due to the long-term action of dynamic loads, which will cause failure of the freight car's braking system, leading to problems such as train brakes and car throws, affecting the normal operation of the freight car.

[0003] In the current brake valve maintenance process, there are mainly the following problems in the implementation of the brake valve assembly process:

[0004] (1) The brake valve assembly work is performed using a brake valve assembly workbench. The assembly table has a set of manual rotation assembly stations. During the assembly process, the assembly table needs to be manually rotated to coordinate the assembly work on the five working surfaces of the valve body. The operation of the workers is time-consuming and labor-intensive, and the labor productivity is low;

[0005] (ii) During assembly, pneumatic wrenches are used to assemble the five working surfaces and tighten the bolts on each working surface. According to the inspection and maintenance regulations in the Railway Freight Car Regulations (the latest version, which is being finalized by the Freight Car Division of the China Railway Corporation and will be released soon), there are corresponding torque requirements for the three types of bolts and nuts that need to be used. The pneumatic wrenches currently used cannot achieve the benchmark torque control, and it is easy for the nut tightening torque to fail to meet the tightening requirements or the tightening torque to be too large, causing damage to the studs or threads, resulting in brake valve failure;

[0006] (III) During the assembly of the brake valve, it is common to mark each nut that has been tightened with a paint pen to ensure that each set of bolts and nuts has been tightened. This process cannot ensure that it is truly implemented and there is a risk of missed or wrong tightening.

[0007] (IV) According to the requirements of the regulations, during the assembly process of each working surface of the main valve, the diagonal installation process must be adopted. First, the nuts at the four corners must be pre-tightened diagonally for the first time, and then they must be pre-tightened a second time one by one according to the diagonal locking process. At this stage, it is impossible to use technical means to monitor the work sequence of employees and the implementation of the process, and there are problems with inadequate implementation of the process and inadequate maintenance. Utility Model Content

[0008] In view of the problems and shortcomings in the prior art, the utility model provides an intelligent auxiliary device for assembling a railway freight car brake valve. The purpose is to solve the problems of substandard bolt tightening torque, incorrect tightening operation sequence, missed tightening, and wrong tightening during the assembly of railway freight car brake valves, thereby ensuring the assembly quality of railway freight car brake valves and reducing accidents caused by brake valve failures in railway freight cars.

[0009] The technical solution of this utility model is as follows:

[0010] The intelligent auxiliary device for assembling the brake valve of railway freight cars includes:

[0011] The workbench includes a support seat, the front end of which is connected to a flip operating table, the top surface of which is connected to a brake valve and can drive each working surface of the brake valve to rotate upward in sequence;

[0012] The fastening assembly is connected to the support seat through a mechanical arm and is located above the flip operating table, and includes a rotation drive device, a torque sensor and a bolt fastener connected in sequence up and down; the mechanical arm is used to drive the fastening assembly to move to the bolt of the brake valve above the flip operating table;

[0013] The electronic control system is connected to the flip operation table, the robotic arm and the torque sensor for communication.

[0014] According to a specific embodiment, the mechanical arm includes a main shaft fixed on the top of the support seat and arranged vertically, and a rotating arm is connected thereto, the arm length direction of the rotating arm is perpendicular to the main shaft and the end of the rotating arm is connected to the fastening assembly, and the rotating arm can rotate around the axis of the main shaft and move up and down along the axis of the main shaft, and the length of the arm is adjustable. A position sensor is provided on the rotating arm, which is connected to the control system for obtaining the position information of the fastening assembly. Specifically, the middle part of the rotating arm is connected to the main shaft, one end is connected to the fastening assembly, and the other end is provided with a rotating handle.

[0015] According to a specific embodiment, the turning operation table includes a first turning mechanism, a second turning mechanism and a workpiece table;

[0016] One end of the first flipping mechanism is fixedly connected to the upper part of the support seat, and the other end is connected to the bottom surface of the workpiece table, which is used to drive the workpiece table to flip forward 90 degrees around the X-axis; the second flipping mechanism is connected under the workpiece table to drive the workpiece table to flip around the Z-axis.

[0017] Specifically, a clamping mechanism is provided on the top surface of the workpiece table, which is used to fix the brake valve on the workpiece table. The first flipping mechanism includes an ear plate, a cylinder and a connecting rod; wherein, the top of the ear plate is fixedly connected to the support seat, the fixed end of the cylinder is hinged to the lower part of the ear plate, the extended end of the cylinder is hinged to the lower part of the connecting rod, the upper part of the connecting rod is hinged to the support seat, and the top is fixedly connected to the workpiece table. During operation, the control system controls the telescopic end of the cylinder to move backward to drive the connecting rod to rotate, and drives the workpiece table to flip forward around the X-axis, thereby flipping the back of the brake valve to horizontal, which is convenient for the fastening assembly above it to tighten the bolts. The second flipping mechanism includes a motor and a dividing plate, the upper part of the dividing plate is connected to the bottom surface of the workpiece table, and the lower part is connected to the motor, and the motor is connected to the control system. The dividing plate is driven by the motor to rotate, and the workpiece table is driven to rotate around the Z-axis, thereby flipping the other surfaces of the brake valve to horizontal, which is convenient for the fastening assembly above it to tighten the bolts.

[0018] According to a specific embodiment, the robotic arm is aligned front and back with the flip operating table, and the robotic arm is located behind the flip operating table.

[0019] The beneficial effects of the utility model are:

[0020] The fastening assembly is driven by the manual operation of the mechanical arm to move to the bolt position on the top surface of the brake valve that needs to be pre-tightened, and the fastening operation is performed. After the fastening is completed, the fastening assembly is moved to the next bolt position to be tightened by the mechanical arm, and the position information is fed back through the control system, and the feedback result is compared with the preset bolt tightening sequence. If it is correct, the fastening assembly is started to perform the bolt pre-tightening operation. If it is incorrect, the mechanical arm is re-operated to move the fastening assembly to the next bolt position to be tightened, and the above steps are repeated. Then the fastening assembly is started, the bolts are tightened by the fastening assembly and the tightening torque is controlled, and the structure is fed back to the control system to ensure that the pre-tightening force of the bolts meets the standard requirements.

[0021] After completing the bolt tightening work on the first working surface, the first flipping mechanism of the flipping operation table drives the worktable to flip forward 90 degrees, flips the bolts originally located on the rear side of the brake valve to the top surface, and repeats the above steps to complete the bolt tightening work on this surface. Then, the second flipping mechanism drives the worktable to rotate around the Z axis, flips the other surfaces of the brake valve to the horizontal position, and then completes the bolt tightening work on the other surfaces according to the above steps.

[0022] Solve the problem that the implementation of maintenance process cannot be effectively solved and prevented in the link of human defense and mutual control. Through the control system, the sequence and torque of the tightening operation of each working surface of the brake valve and the bolts on each working surface are controlled, making the assembly of the brake valve more practical and controllable, and preventing the occurrence of missed tightening, wrong tightening, and too small pre-tightening force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an axonometric view of an embodiment;

[0024] Figure 2 for Figure 1 The middle flip operation table is flipped forward 90 degrees around the X-axis;

[0025] Figure 3 It is a partial enlarged view of the mechanical arm and the fastening components;

[0026] Figure 4 This is a partial enlarged view of the workbench;

[0027] Figure 5 This is a partial enlarged view of the flip operating table;

[0028] 1. Workbench; 2. Robotic arm; 3. Fastening assembly; 11. Support seat; 12. Turning operation table; 121. First turning mechanism; 1211. Ear plate; 1212. Cylinder; 1213. Connecting rod; 122. Second turning mechanism; 123. Workpiece table; 124. Clamping mechanism; 31. Rotation drive device; 21. Spindle; 22. Rotating arm; 32. Torque sensor; 33. Bolt fasteners. DETAILED DESCRIPTION

[0029] The following will further describe the technical means adopted to achieve the predetermined inventive purpose of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0030] See also Figure 1 As shown, the railway freight car brake valve assembly intelligent auxiliary device includes:

[0031] Workbench 1, see Figure 1 and Figure 4 , including a support seat 11, a front end of which is connected to a flip operating table 12, a top surface of the flip operating table 12 is connected to a brake valve, and can drive each working surface of the brake valve to rotate upward in sequence, specifically, the five working surfaces of the railway freight car brake valve in this embodiment can be rotated to an upward position in sequence, so as to facilitate bolt tightening of the working surface;

[0032] See also Figure 1 and Figure 3 As shown, the fastening assembly 3 is connected to the support base 11 through the mechanical arm 2 and is located above the flip operating table 12, and includes a rotation drive device 31, a torque sensor 32 and a bolt fastener 33 connected in sequence from top to bottom; the mechanical arm 2 is used to drive the fastening assembly 3 to move to the bolt of the brake valve above the flip operating table 12;

[0033] The electric control system is connected to the flip operation platform 12, the mechanical arm 2 and the torque sensor 32 for controlling the power element of the flip operation platform 12 and obtaining the position information and torque information of the fastening assembly 3 connected to the mechanical arm 2.

[0034] Specifically, the rotation drive device 31 can be a motor connected to a reducer, and the reducer is connected to a torque sensor 32, wherein the motor is preferably a servo motor, and the motor and the torque sensor 32 are connected to the control system in communication, and the control system controls the motor to adjust the torque of the bolt fastener 33, and the torque sensor 32 feeds back the torque value to the control system to achieve closed-loop control. The bolt fastener 33 can be a sleeve head and a sleeve, wherein the upper end of the sleeve head is connected to the torque sensor 32, and the lower end is detachably connected to the sleeve, and the model of the sleeve matches the specification of the bolt.

[0035] See also Figure 3 As shown, according to a specific embodiment, the robot arm 2 includes a main shaft 21 fixed to the top of the support seat 11 and arranged vertically, and a rotating arm 22 is connected thereto, the arm length direction of the rotating arm 22 is perpendicular to the main shaft 21 and the end thereof is connected to the fastening assembly 3, and can rotate around the axis of the main shaft 21 and move up and down along the axis of the main shaft 21, and the length of the arm length is adjustable. A position sensor is provided on the rotating arm 22, which is connected to the control system for communication and is used to obtain the position information of the fastening assembly 3. Specifically, the middle part of the rotating arm 22 is connected to the main shaft 21, one end is connected to the fastening assembly 3, and the other end is provided with a rotating handle.

[0036] See also Figure 5 As shown, according to a specific embodiment, the turning operation table 12 includes a first turning mechanism 121, a second turning mechanism 122 and a workpiece table 123;

[0037] One end of the first flipping mechanism 121 is fixedly connected to the upper part of the support seat 11, and the other end is connected to the bottom surface of the workpiece table 123, which is used to drive the workpiece table 123 to flip forward 90 degrees around the X-axis; the second flipping mechanism 122 is connected under the workpiece table 123, which is used to drive the workpiece table 123 to flip around the Z-axis.

[0038] Specifically, a clamping mechanism 124 is provided on the top surface of the workpiece table 123, which is used to fix the brake valve on the workpiece table 123. The first flipping mechanism 121 includes an ear plate 1211, a cylinder 1212 and a connecting rod 1213; wherein, the top of the ear plate 1211 is fixedly connected to the support seat 11, the fixed end of the cylinder 1212 is hinged to the lower part of the ear plate 1211, the extended end of the cylinder 1212 is hinged to the lower part of the connecting rod 1213, the upper part of the connecting rod 1213 is hinged to the support seat 11, and the top is fixedly connected to the workpiece table 123. During operation, the control system controls the telescopic end of the cylinder 1212 to move backward to drive the connecting rod 1213 to rotate, and drives the workpiece table 123 to flip forward around the X-axis, thereby flipping the back of the brake valve to a horizontal position, which is convenient for the fastening assembly 3 located above it to tighten the bolts. The second flipping mechanism 122 includes a motor and a dividing plate, the upper part of the dividing plate is connected to the bottom surface of the workpiece table 123, and the lower part is connected to the motor, and the motor is connected to the control system. The motor drives the dividing plate to rotate, and drives the workpiece table 123 to rotate around the Z axis, so that the other surfaces of the brake valve are flipped to the horizontal, which is convenient for the fastening assembly 3 located above it to tighten the bolts.

[0039] See Figure 1 and Figure 2 As shown, according to a specific embodiment, the robot arm 2 is aligned front and back with the flip operating platform 12 , and the robot arm 2 is located behind the flip operating platform 12 .

[0040] The working principle of the utility model is as follows, see Figure 1 and Figure 2 :

[0041] The mechanical arm 2 is manually operated to drive the fastening assembly 3 to move to the bolt position on the top surface of the brake valve that needs to be pre-tightened, and the fastening operation is performed. After the fastening is completed, the fastening assembly 3 is moved to the next bolt position to be tightened by the mechanical arm 2, and the position information is fed back through the control system, and the feedback result is compared with the preset bolt tightening sequence. If it is correct, the fastening assembly 3 is started to perform the bolt pre-tightening operation. If it is incorrect, the mechanical arm 2 is re-operated to move the fastening assembly 3 to the next bolt position to be tightened, and the above steps are repeated. Then the fastening assembly 3 is started, the bolts are tightened by the fastening assembly 3 and the tightening torque is controlled, and the structure is fed back to the control system to ensure that the pre-tightening force of the bolts meets the standard requirements.

[0042] After completing the bolt tightening work on the first working surface, the first flipping mechanism 121 of the flipping operation table 12 drives the worktable 123 to flip forward 90 degrees, flips the bolts originally located on the rear side of the brake valve to the top surface, and repeats the above steps to complete the bolt tightening work on this surface. Then, the second flipping mechanism 122 drives the worktable 123 to rotate around the Z axis, so that the other surfaces of the brake valve are flipped to a horizontal position, and then manually adjust the robot arm 2 according to the above steps so that the fastening component 3 is located above the brake valve, and start the fastening component 3, and then operate the robot arm 2 to tighten the bolts on this surface in sequence according to the set order, and finally complete the tightening of the bolts at all connections of the brake valve, and store the tightening torque and tightening sequence in the control system.

[0043] The above is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments and examples. Various changes, equivalent substitutions, improvements, etc. made within the knowledge scope of those skilled in the art without departing from the concept of the present invention should be included in the protection scope of the present invention.

Claims

1. Intelligent auxiliary device for assembling brake valve of railway freight car, characterized in that: include: The workbench (1) comprises a support seat (11), the front end of which is connected to a flip operating table (12), the top surface of which is connected to a brake valve and can drive each working surface of the brake valve to rotate upward in sequence; A fastening assembly (3) is connected to a support seat (11) via a mechanical arm (2) and is located above a flip operating table (12), and comprises a rotation drive device (31), a torque sensor (32) and a bolt fastener (33) connected in sequence up and down; the mechanical arm (2) is used to drive the fastening assembly to move to the bolt of the brake valve above the flip operating table (12); The electric control system is communicatively connected with the turning operation platform (12), the mechanical arm (2) and the torque sensor (32).

2. The intelligent assistance device according to claim 1, characterized in that: The mechanical arm (2) comprises a main shaft (21) fixed on the top of the support seat (11) and arranged vertically, and a rotating arm (22) is connected thereto, the arm length direction of the rotating arm (22) is perpendicular to the main shaft (21) and the end of the rotating arm (22) is connected to the fastening assembly (3), and the rotating arm (22) can rotate around the axis of the main shaft (21) and move up and down along the axis of the main shaft (21), and the length of the arm is adjustable.

3. The intelligent assistance device according to claim 2, characterized in that: The rotating arm (22) is provided with a position sensor which is in communication connection with the control system and is used to obtain position information of the fastening assembly (3).

4. The intelligent assistance device according to claim 3, characterized in that: The middle part of the rotating arm (22) is connected to the main shaft (21), one end is connected to the fastening assembly (3), and the other end is provided with a rotating handle.

5. The intelligent assistance device according to any one of claims 1 to 4, characterized in that: The turning operation table (12) comprises a first turning mechanism (121), a second turning mechanism (122) and a workpiece table (123); One end of the first flipping mechanism (121) is fixedly connected to the upper part of the support seat (11), and the other end is connected to the bottom surface of the workpiece table (123), and is used to drive the workpiece table (123) to flip forward 90 degrees around the X-axis; the second flipping mechanism (122) is connected below the workpiece table (123), and is used to drive the workpiece table (123) to flip around the Z-axis.

6. The intelligent assistance device according to claim 5, characterized in that: The top surface of the workpiece platform (123) is provided with a clamping mechanism (124) for fixing the brake valve on the workpiece platform (123).

7. The intelligent assistance device according to claim 5, characterized in that: The first turning mechanism (121) comprises an ear plate (1211), a cylinder (1212) and a connecting rod (1213); The top of the ear plate (1211) is fixedly connected to the support seat (11), the fixed end of the cylinder (1212) is hinged to the lower part of the ear plate (1211), the extended end of the cylinder (1212) is hinged to the lower part of the connecting rod (1213), the upper part of the connecting rod (1213) is hinged to the support seat (11), and the top is fixedly connected to the workpiece platform (123).

8. The intelligent assistance device according to claim 5, characterized in that: The second turning mechanism (122) comprises a motor and a dividing plate, wherein the upper portion of the dividing plate is connected to the bottom surface of the workpiece platform (123), and the lower portion is connected to the motor, and the motor is in communication connection with the control system.

9. The intelligent assistance device according to claim 6, 7 or 8, characterized in that: The mechanical arm (2) is arranged to be aligned front and back with the turning operation platform (12), and the mechanical arm (2) is located behind the turning operation platform (12).

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