Crane steering comprehensive test device

Abstract

The invention relates to the technical field of railway equipment testing, in particular to a crane steering comprehensive testing device which comprises a detection shell, a simulation track is fixedly connected to the inner side surface of the detection shell, and a pressure sensor is arranged on the inner wall of the lower end of the detection shell and arranged below the simulation track. The pressure sensor is connected with a display control device, a simulation frame is arranged above the simulation track, and a steering unit to be tested is installed above the simulation frame. According to the application, the pressing assembly is arranged on the surface of the transverse moving frame, so that the pressing assembly can be in pressing contact with the to-be-tested steering unit, and the matched extrusion assembly is arranged above the pressing assembly, so that the extrusion assembly can stretch out to apply pressure to the pressing assembly, and the to-be-tested steering unit can simulate the pressure in the use process; the effect of applying pressure to different positions of the steering unit to be tested to simulate the use environment is achieved, and the problem that the use environment simulation test cannot be performed on independent parts of the steering unit is solved.

Description

Technical Field

[0001] The present application relates to the technical field of railway equipment testing, and in particular to a comprehensive crane steering testing device. Background Art

[0002] Rail transit refers to a type of transportation vehicle or transportation system in which operating vehicles need to travel on specific tracks. In the national standard "Common Terms and Terms for Urban Public Transportation", urban rail transit is defined as "a general term for rapid and large-volume public transportation that is usually powered by electricity and adopts a wheel-rail operation mode." With the diversified development of train and railway technology, rail transit has shown more and more types, not only covering long-distance land transportation, but also widely used in medium and short-distance urban public transportation. Common rail transit includes traditional railways (ordinary railways, intercity railways and urban railways), subways, light rails and trams, in addition to new rail transit such as magnetic levitation rail systems and monorail systems. In the Chinese national standard "Common Terms and Terms for Urban Public Transportation", urban rail transit is defined as "a general term for rapid and large-volume public transportation that is usually powered by electricity and adopts a wheel-rail operation mode." In the field of rail transit technology, after the vehicle bogie is assembled, in order to ensure the quality and safety performance of use, comprehensive testing of steering is required.

[0003] Through searching, Chinese patent announcement number CN104897422B discloses a vehicle bogie comprehensive test bench, including a base, and a static load test device, a running-in test device and a lifting support system installed on the base; the static load test device includes a gantry, a pressing device and a fixed rail, the top of the fixed rail is used to support the outer tread of the wheel of the vehicle bogie, and a pressure sensor is installed in the track groove of each fixed rail; the running-in test device includes a running-in system and a lifting mechanism, and the friction wheel of the running-in system is located directly below the inner rim of the bottom of the wheel; each wheel of the vehicle bogie is equipped with a fixed rail and a running-in test device, and the lifting support system is located directly below the center of mass of the vehicle bogie. The static load test device, the running-in test device and the weighing function are integrated into one, which effectively saves space, no longer requires a crane for transfer, greatly reduces the workload of lifting, improves work efficiency and equipment operation safety, makes the process layout more reasonable, and makes inspection and maintenance more convenient and efficient.

[0004] Through searching, Chinese patent announcement No. CN112834250A discloses a high-speed rail bogie comprehensive test bench, including multiple track devices capable of carrying test vehicles and traction devices located on both sides of the track devices, the track device includes a mounting platform and multiple groups of rail wheel assemblies arranged on the mounting platform along the travel direction of the test vehicle, each group of rail wheel assemblies is arranged corresponding to the wheel pair on the bogie of the test vehicle; the rail wheel assembly includes two rail wheel units arranged side by side and in parallel and a first traction motor for driving any rail wheel unit, the rail wheel unit includes two supporting seats respectively installed on the left and right sides of the mounting platform, a rail wheel axle installed on the supporting seat, and rail wheels respectively installed at both ends of the rail wheel axle; the invention utilizes the wheels of the bogie and two adjacent rail wheels to form a non-falling wheel structure, combined with the oscillation assembly arranged at the end of the rail wheel axle to realize the comprehensive test of the bogie performance, and utilizes the size and structural settings of the wheels and the rail wheels to improve the reliability of the detection.

[0005] With regard to the above-mentioned related technologies, it is believed that the following defects exist: during the bogie test, the rotating parts of the bogie cannot be tested independently. As the speed of rail trains increases with development, the quality requirements for independent parts are getting higher and higher. The existing testing equipment cannot perform tests such as pressure rotation on independent parts, and there will be problems such as being unable to simulate the use environment test of the independent parts of the steering unit, and being unable to simulate the operating actions and monitor them. Therefore, a comprehensive crane steering test device is proposed to solve the above problems. Summary of the invention

[0006] In order to solve the problems raised in the background technology, the present application provides a comprehensive crane steering test device.

[0007] The present application provides a comprehensive crane steering test device, which adopts the following technical scheme: it includes a detection shell, the inner surface of the detection shell is fixedly connected to a simulation track, the inner wall of the lower end of the detection shell is provided with a pressure sensor, the pressure sensor is arranged below the simulation track, the pressure sensor is connected to a display control device, a simulation frame is arranged above the simulation track, a steering unit to be tested is installed above the simulation frame, a positioning guide frame is fixedly connected to the inner side of the detection shell, a avoidance motor is fixedly connected to the inner side of the positioning guide frame, a transverse threaded rod is fixedly connected to the output end of the avoidance motor, a transverse frame is meshed with the outer surface of the transverse threaded rod, both sides of the transverse frame are slidably connected to the inner wall of the positioning guide frame, a pressing component is arranged on the surface of the transverse frame, and the upper end of the detection shell is fixedly connected to A lifting support shell is provided with a lifting component on the inner side of the lifting support shell. There are two groups of lifting components. The two groups of lifting components are jointly clamped with a lifting platform on one side close to each other. The inner side of the lifting platform is rotatably connected with a torsion mechanism. The inner side of the lower end of the torsion mechanism is slidably connected with a connecting pile. The lower end of the connecting pile is connected to the steering unit to be tested by screws. The upper end of the lifting support shell is fixedly connected with a stabilizing frame. The upper end of the stabilizing frame is fixedly connected with a torsion motor. The output end of the torsion motor is fixedly connected with a sliding gear column. The sliding gear column is meshed with the torsion mechanism. A linkage frame is fixedly connected to the upper surface of the lifting platform. An extrusion component is fixedly connected to the inner side of the linkage frame. The extrusion component is in contact with the pressing component. A stabilizing rod is rotatably connected to the surface of the linkage frame. A detection rod is rotatably connected to the surface of the linkage frame. The detection rod is connected to the display control device.

[0008] Optionally, the pressing assembly is distributed in an array on the surface of the transverse frame. The pressing assembly consists of a pressing cap, a return spring and a locking key. The pressing cap passes through the transverse frame. The return spring is sleeved on the outside of the pressing cap. The return spring is located above the transverse frame. The lower end of the pressing cap is fixedly connected to a locking key, which is locked above the steering unit to be tested.

[0009] Optionally, the lifting assembly includes a lifting motor, a lifting threaded rod and a lifting arm. The lifting motor is fixedly connected to the inner side of the lifting support shell. The output end of the lifting motor is fixedly connected to the lifting threaded rod. The surface of the lifting threaded rod is threadedly connected to the lifting arm. The lifting arm is slidably connected to the inner wall of the lifting support shell. The lower end of the lifting arm is provided with a slot to engage with the lifting platform.

[0010] Optionally, the torsion mechanism consists of a torsion disk, a torsion cylinder, a stabilizing disk and a driving ring. The outer side of the torsion disk is provided with teeth and the inner side is a square hole. The upper surface of the torsion disk is fixedly connected to the torsion cylinder, the upper end of the torsion cylinder is fixedly connected to the stabilizing disk, the outer side of the stabilizing disk is provided with teeth, and the upper end of the stabilizing disk is fixedly connected to the driving ring.

[0011] Optionally, the lower end of the connecting pile is disc-shaped, a quadrangular prism is provided on the upper surface of the disc of the connecting pile, the torsion disk is sleeved on the outer side of the quadrangular prism and connected thereto by sliding up and down, and screws are provided on the edge of the disc of the connecting pile.

[0012] Optionally, the simulated track is divided into guide rails and sleepers, and the pressure sensor is arranged under the sleepers.

[0013] Optionally, the extrusion assembly is composed of a plurality of groups of independent hydraulic telescopic rods, the extrusion assembly corresponds to the pressing assembly one by one, and a locking groove is provided at the free end of the extrusion assembly.

[0014] Optionally, the middle of the stabilizer bar is a round bar, and both ends are gears, the gear at the upper end of the stabilizer bar is meshed with the stabilizer plate, and the gear at the lower end of the stabilizer bar is meshed with the torsion plate.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] 1. The comprehensive crane steering test device, by arranging a pressing component on the surface of the transverse frame so that the pressing component can press and contact the steering unit to be tested, by arranging a matching extrusion component above the pressing component so that the extrusion component can extend to apply pressure to the pressing component, so that the pressing component can apply pressure on the surface of the steering unit to be tested, by arranging the extrusion components in different directions and arranging the pressing components that match each other one by one, so that pressure at different positions on the surface of the steering unit to be tested can be applied, so that the steering unit to be tested can simulate the pressure during use, thereby achieving the effect of applying pressure at different positions of the steering unit to be tested to simulate the use environment, and solving the problem that the independent components of the steering unit cannot be tested in the simulated use environment.

[0017] 2. The comprehensive crane steering test device sets a connecting pile that matches the steering unit to be tested, so that the rotation of the controlling connecting pile can drive the steering unit to be tested to rotate. Two sets of stabilizing bars are set on the outside of the torsion mechanism, so that the torsion mechanism can disperse and reduce the torsion force when rotating, and prevent the torsion mechanism from being deformed due to long-term use. The stability of the torsion mechanism when rotating at various positions is detected by fitting the detection rod to the torsion mechanism, and feedback is given on the rotation running-in of the detection part, so as to achieve the effect of promoting the rotation of the steering unit to be tested to simulate the working action and monitor it, and solve the problem that the test device cannot simulate the working action and monitor it.

[0018] 3. The crane steering comprehensive test device sets a simulated track and a pressure sensor under the simulated track, so that the steering mechanism can judge the pressure generated during the test and the pressure applied to the track, so that the pressure of the bogie on the track can also be detected during the test, thereby achieving the effect of detecting the pressure of the bogie on the track and solving the problem that the pressure of the crane bogie on the track cannot be calculated and detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the detection housing structure in an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the transverse frame structure in an embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of the simulated track structure in the embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the lifting assembly structure in an embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the connecting pile structure in an embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the linkage frame structure in the embodiment of the present application;

[0026] Figure 8 It is a schematic diagram of the structure of the torsion mechanism in the embodiment of the present application.

[0027] 1. Test housing; 2. Simulated track; 3. Pressure sensor; 4. Display control device; 5. Simulated vehicle frame; 6. Steering unit to be tested; 7. Positioning guide frame; 8. Avoidance motor; 9. Transverse threaded rod; 10. Transverse frame; 11. Pressing assembly; 111. Pressing cap; 112. Reset spring; 113. Positioning key; 12. Lifting support shell; 13. Lifting assembly; 131. Lifting motor; 132. Lifting threaded rod; 133. Lifting arm; 14. Lifting platform; 15. Torsion mechanism; 151. Torsion disk; 152. Torsion cylinder; 153. Stabilizing disk; 154. Driving ring; 16. Connecting pile; 17. Stabilizing frame; 18. Torsion motor; 19. Sliding gear column; 20. Linkage frame; 21. Extrusion assembly; 211. Positioning groove; 22. Stabilizing rod; 23. Test rod. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-8 This application is described in further detail.

[0029] The present application embodiment discloses a comprehensive crane steering test device. Figure 1-8 As shown, it includes a detection shell 1, the inner surface of the detection shell 1 is fixedly connected to a simulation track 2, the inner wall of the lower end of the detection shell 1 is provided with a pressure sensor 3, the pressure sensor 3 is arranged below the simulation track 2, the simulation track 2 is divided into a guide rail and a sleeper, the pressure sensor 3 is arranged below the sleeper, and the simulation track 2 is convenient for testing the bogie on the top by arranging the guide rail and the sleeper, and can conveniently detect the pressure generated on the track during the test.

[0030] The pressure sensor 3 is connected to a display control device 4, a simulation frame 5 is arranged above the simulation track 2, a steering unit 6 to be tested is installed above the simulation frame 5, a positioning guide frame 7 is fixedly connected to the inner side of the detection shell 1, a dodge motor 8 is fixedly connected to the inner side of the positioning guide frame 7, a transverse threaded rod 9 is fixedly connected to the output end of the dodge motor 8, a transverse frame 10 is meshed with the outer surface of the transverse threaded rod 9, both sides of the transverse frame 10 are slidably connected to the inner wall of the positioning guide frame 7, a pressing component 11 is arranged on the surface of the transverse frame 10, and the pressing component 11 is distributed in an array on the surface of the transverse frame 10, and the pressing component 11 is composed of a pressing cap 111, a return spring 112 and a locking key 113, the pressing cap 111 passes through the transverse frame 10, a reset spring 112 is sleeved on the outer side of the pressing cap 111, the reset spring 112 is located above the transverse frame 10, the lower end of the pressing cap 111 is fixedly connected with a locking key 113, the locking key 113 is locked above the steering unit 6 to be tested, the pressing assembly 11 can use the locking key 113 to lock and press the steering unit 6 to be tested, and by setting a smooth plane for the locking key 113, it is convenient for the steering unit 6 to be tested to slide with it when it rotates, and by setting the reset spring 112, the locking key 113 can be lifted and reset in time when it is not affected by pressure.

[0031] A lifting support shell 12 is fixedly connected to the upper end of the detection shell 1, and a lifting assembly 13 is arranged on the inner side of the lifting support shell 12. There are two groups of lifting assemblies 13. A lifting platform 14 is commonly clamped on one side of the two groups of lifting assemblies 13 that are close to each other. A torsion mechanism 15 is rotatably connected on the inner side of the lifting platform 14. The lifting assembly 13 includes a lifting motor 131, a lifting threaded rod 132 and a lifting arm 133. The lifting motor 131 is fixedly connected to the inner side of the lifting support shell 12, and a lifting threaded rod 132 is fixedly connected to the output end of the lifting motor 131. The lifting arm 133 is threadedly connected to the surface of the lifting threaded rod 132. The lifting arm 133 is slidably connected to the inner wall of the lifting support shell 12, and a slot is arranged at the lower end of the lifting arm 133 to clamp the lifting platform 14. The lifting assembly 13 can drive the lifting platform 14 to rise and fall, so that the lifting platform 14 can be lifted to avoid the detection part and lowered to approach the detection part.

[0032] A connecting pile 16 is slidably connected to the inner side of the lower end of the torsion mechanism 15. The torsion mechanism 15 consists of a torsion disk 151, a torsion cylinder 152, a stabilizing disk 153 and a driving ring 154. The outer side of the torsion disk 151 is provided with teeth and the inner side is a square hole. The upper surface of the torsion disk 151 is fixedly connected to the torsion cylinder 152. The upper end of the torsion cylinder 152 is fixedly connected to the stabilizing disk 153. The outer side of the stabilizing disk 153 is provided with teeth. The upper end of the stabilizing disk 153 is fixedly connected to the driving ring 154. The torsion mechanism 15 can rotate to drive the connecting pile 16 to rotate, so that the steering unit 6 to be tested has power to rotate after pressure is applied, which is convenient for simulation tests.

[0033] The lower end of the connecting pile 16 is connected to the steering unit 6 to be tested by screws. The lower end of the connecting pile 16 is disc-shaped. A quadrangular prism is provided on the upper surface of the disc of the connecting pile 16. The torsion disk 151 is sleeved on the outer side of the quadrangular prism and connected with it for up and down sliding. The edge of the disc of the connecting pile 16 is provided with screws. The connecting pile 16 can be connected with the steering unit 6 to be tested, so as to facilitate the rotation of the steering unit 6 to be tested.

[0034] A stabilizing frame 17 is fixedly connected to the upper end of the lifting support shell 12, a torsion motor 18 is fixedly connected to the upper end of the stabilizing frame 17, a sliding gear column 19 is fixedly connected to the output end of the torsion motor 18, the sliding gear column 19 is meshed with the torsion mechanism 15, a linkage frame 20 is fixedly connected to the upper surface of the lifting platform 14, an extrusion assembly 21 is fixedly connected to the inner side of the linkage frame 20, the extrusion assembly 21 is composed of a plurality of independent hydraulic telescopic rods, the extrusion assembly 21 corresponds to the pressing assembly 11 one by one, a locking groove 211 is provided at the free end of the extrusion assembly 21, the extrusion assembly 21 can be extended one by one to control the lifting and lowering of the locking key 113, and pressure can be applied to various positions of the steering unit 6 to be tested, so as to facilitate the simulation of various working conditions of different components.

[0035] The extrusion assembly 21 is in contact with the pressing assembly 11, and the surface of the linkage frame 20 is rotatably connected with a stabilizing rod 22. The middle of the stabilizing rod 22 is a round rod, and both ends are gears. The gear at the upper end of the stabilizing rod 22 is meshed with the stabilizing disk 153, and the gear at the lower end of the stabilizing rod 22 is meshed with the torsion disk 151. The stabilizing rod 22 can assist in eliminating the torsion force generated by the torsion mechanism 15 during rotation by meshing at the upper and lower ends of the torsion mechanism 15.

[0036] The surface of the linkage frame 20 is rotatably connected with a detection rod 23, which is connected to the display control device 4. The pressure sensor 3, the display control device 4 and the detection rod 23 are all existing sensors and electrical components. The pressure sensor 3 is used to detect the pressure of the simulated track 2, the display control device 4 is used for data display feedback, and the detection rod 23 is used to detect the smoothness of the rotation of the torsion mechanism 15. The data of the pressure sensor 3 and the detection rod 23 are displayed and controlled by the display control device 4.

[0037] The implementation principle of a comprehensive crane steering test device according to the embodiment of the present application is as follows: when in use, firstly, the steering unit 6 to be tested is installed on the simulation frame 5, so that the simulation frame 5 moves to a suitable position on the surface of the simulation track 2, and the avoidance motor 8 is started to drive the transverse threaded rod 9 to rotate, and the rotation of the transverse threaded rod 9 pushes the transverse frame 10 to extend, so that the transverse frame 10 surrounds the top of the steering unit 6 to be tested, and the lifting motor 131 is started to drive the lifting threaded rod 132 to rotate, so that the lifting arm 133 drives the lifting platform 14 to descend, so that the extrusion component 21 clamps the pressing component 11 According to the test requirements, a single extrusion component 21 or all the extrusion components 21 are used to press the pressing cap 111, so that the locking key 113 applies forces in various directions to the steering unit 6 to be tested. By installing the matching connecting pile 16 above the steering unit 6 to be tested, the sliding gear column 19 is driven to rotate by starting the torsion motor 18, so that the sliding gear column 19 pushes the torsion mechanism 15 to rotate, and the torsion mechanism 15 drives the connecting pile 16 to rotate, so that the steering unit 6 to be tested is rotated to test the data of its connection part, and the data after the component is pressed and rotated is detected by the pressure sensor 3 and the detection rod 23.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A comprehensive crane steering test device, comprising a detection housing (1), characterized in that: The inner surface of the detection housing (1) is fixedly connected to a simulation track (2); a pressure sensor (3) is arranged on the inner wall of the lower end of the detection housing (1); the pressure sensor (3) is arranged below the simulation track (2); the pressure sensor (3) is connected to a display control device (4); a simulation frame (5) is arranged above the simulation track (2); a steering unit (6) to be tested is installed above the simulation frame (5); a positioning guide frame (7) is fixedly connected to the inner side of the detection housing (1); a evasion motor (8) is fixedly connected to the inner side of the positioning guide frame (7); a transverse threaded rod (9) is fixedly connected to the output end of the evasion motor (8); a transverse frame (10) is meshed with the outer surface of the transverse threaded rod (9); both sides of the transverse frame (10) are slidably connected to the inner wall of the positioning guide frame (7); a pressing component (11) is arranged on the surface of the transverse frame (10); The upper end of the detection housing (1) is fixedly connected to a lifting support shell (12), a lifting assembly (13) is arranged inside the lifting support shell (12), there are two groups of lifting assemblies (13), the two groups of lifting assemblies (13) are mutually close to each other and are commonly clamped with a lifting platform (14), the lifting platform (14) is rotatably connected to a twisting mechanism (15) inside, the lower end of the twisting mechanism (15) is slidably connected to a connecting pile (16), and the lower end of the connecting pile (16) is connected to the steering unit (6) to be tested by screws; The upper end of the lifting support shell (12) is fixedly connected to a stabilizing frame (17), the upper end of the stabilizing frame (17) is fixedly connected to a torsion motor (18), the output end of the torsion motor (18) is fixedly connected to a sliding tooth column (19), the sliding tooth column (19) is meshed with the torsion mechanism (15), the upper surface of the lifting platform (14) is fixedly connected to a linkage frame (20), the inner side of the linkage frame (20) is fixedly connected to an extrusion component (21), the extrusion component (21) is in contact with the pressing component (11), the surface of the linkage frame (20) is rotatably connected to a stabilizing rod (22), the surface of the linkage frame (20) is rotatably connected to a detection rod (23), and the detection rod (23) is connected to the display control device (4).

2. A comprehensive crane steering test device according to claim 1, characterized in that: The pressing components (11) are distributed in an array on the surface of the transverse frame (10), and the pressing components (11) are composed of a pressing cap (111), a return spring (112) and a locking key (113). The pressing cap (111) passes through the transverse frame (10), and a return spring (112) is sleeved on the outer side of the pressing cap (111). The return spring (112) is located above the transverse frame (10). The lower end of the pressing cap (111) is fixedly connected to the locking key (113), and the locking key (113) is locked above the steering unit (6) to be tested.

3. A comprehensive crane steering test device according to claim 1, characterized in that: The lifting assembly (13) comprises a lifting motor (131), a lifting threaded rod (132) and a lifting arm (133); the lifting motor (131) is fixedly connected to the inner side of the lifting support shell (12); the lifting threaded rod (132) is fixedly connected to the output end of the lifting motor (131); the lifting arm (133) is threadedly connected to the surface of the lifting threaded rod (132); the lifting arm (133) is slidably connected to the inner wall of the lifting support shell (12); and a clamping groove is provided at the lower end of the lifting arm (133) for clamping with the lifting platform (14).

4. A comprehensive crane steering test device according to claim 1, characterized in that: The torsion mechanism (15) is composed of a torsion disk (151), a torsion cylinder (152), a stabilizing disk (153) and a driving ring (154); the outer side of the torsion disk (151) is provided with teeth and the inner side is a square hole; the upper surface of the torsion disk (151) is fixedly connected to the torsion cylinder (152); the upper end of the torsion cylinder (152) is fixedly connected to the stabilizing disk (153); the outer side of the stabilizing disk (153) is provided with teeth; and the upper end of the stabilizing disk (153) is fixedly connected to the driving ring (154).

5. A comprehensive crane steering test device according to claim 4, characterized in that: The lower end of the connecting pile (16) is disc-shaped, and a quadrangular prism is arranged on the upper surface of the disc of the connecting pile (16). The torsion disk (151) is sleeved on the outer side of the quadrangular prism and connected with it by sliding up and down. The edge of the disc of the connecting pile (16) is provided with a screw.

6. A comprehensive crane steering test device according to claim 1, characterized in that: The simulation track (2) is divided into a guide rail and a sleeper, and the pressure sensor (3) is arranged below the sleeper.

7. A comprehensive crane steering test device according to claim 1, characterized in that: The extrusion assembly (21) is composed of a plurality of groups of independent hydraulic telescopic rods. The extrusion assembly (21) corresponds to the pressing assembly (11) one by one, and a locking groove (211) is provided at the free end of the extrusion assembly (21).

8. A comprehensive crane steering test device according to claim 4, characterized in that: The middle of the stabilizing rod (22) is a round rod, and both ends are gears. The gear at the upper end of the stabilizing rod (22) meshes with the stabilizing disk (153), and the gear at the lower end of the stabilizing rod (22) meshes with the torsion disk (151).

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