Reciprocating motion displacement loading and control device

Abstract

The invention discloses a reciprocating motion displacement loading and control device. The reciprocating motion displacement loading and control device comprises a closed-loop control assembly and an adjustable lifting platform. The closed-loop control assembly is composed of an air cylinder, a first capacitance position sensor, a first time relay, a first current relay, a second capacitance position sensor, a second time relay, a second current relay and an electromagnetic valve, and the first capacitance position sensor, the first current relay, the first time relay and the electromagnetic valve are sequentially connected. The second capacitance position sensor, the second current relay, the second time relay and the electromagnetic valve are sequentially connected, the normally-open output of the first current relay is connected with the normally-closed input of the second current relay in parallel, and the normally-closed output of the first current relay is connected with the normally-open input of the second current relay in parallel. The piston rod is connected with the stabilizer bar, the stabilizer bar is installed in the middle of the adjustable lifting platform, and the adjustable lifting platform plays a role in limiting the up-down reciprocating motion of the stabilizer bar.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle development and testing, and relates to a reciprocating motion displacement loading and control device. Background Art

[0002] During the manufacturing process, vehicles undergo fatigue testing to verify their performance. This is typically done using a stabilizer bar fatigue loading test bench, which utilizes a reciprocating closed-loop controller to achieve this motion. However, these controllers typically utilize PLCs, which are costly and complex to program. These controllers require a host computer and require high-level technician skills. Summary of the Invention

[0003] To address the aforementioned technical issues, the present invention provides a reciprocating displacement loading and control device that utilizes relays as logic control elements in conjunction with capacitive position sensors to achieve low-cost closed-loop position control. Furthermore, an adjustable lifting platform provides dual position limits for the reciprocating motion of the stabilizer bar, improving fatigue test accuracy.

[0004] To achieve the above-mentioned objectives, the technical solution of the present invention is: a reciprocating displacement loading and control device, comprising a closed-loop control component and an adjustable lifting platform. The closed-loop control component is composed of a cylinder, a first capacitance position sensor, a first time relay, a first current relay, a second capacitance position sensor, a second time relay, a second current relay, and a solenoid valve. The first capacitance position sensor, the first current relay, the first time relay, and the solenoid valve are connected in sequence. The second capacitance position sensor, the second current relay, the second time relay, and the solenoid valve are connected in sequence. The normally open output of the first current relay is connected in parallel with the normally closed input of the second current relay, and the normally closed output of the first current relay is connected in parallel with the normally open input of the second current relay. The first capacitance position sensor and the second capacitance position sensor are used to sense the position of the piston rod of the cylinder during reciprocating motion. The piston rod is connected to a stabilizer bar, which is installed in the middle of the adjustable lifting platform. The adjustable lifting platform limits the up and down reciprocating motion of the stabilizer bar.

[0005] Preferably, the closed-loop control component is controlled to be closed or opened by a power supply and a main switch, which facilitates operational control.

[0006] Preferably, the closed-loop control component further includes a counter for accumulating the number of reciprocating motions of the piston rod to facilitate test data statistics.

[0007] Preferably, the adjustable lifting platform includes four guide screws and two adjustment platform assemblies, the two adjustment platform assemblies being arranged one above the other. The four guide screws are arranged vertically and parallel to each other, connecting the two adjustment platform assemblies. The adjustment platform assemblies utilize a worm gear structure, and the distance between the two adjustment platform assemblies can be manually adjusted. Manually adjusting the distance between the two adjustment platform assemblies is used to limit the up and down reciprocating motion of the stabilizer bar.

[0008] Preferably, the adjustment platform assembly includes a limit platform and a first transverse worm gear, a second transverse worm gear, and a synchronous belt mounted thereon. The first transverse worm gear and the second transverse worm gear are arranged parallel to each other and connected at their ends by a synchronous belt. When the first transverse worm gear is rotated, the synchronous belt transmits power to the second transverse worm gear, thereby driving the second transverse worm gear to rotate synchronously with the first transverse worm gear. Both ends of the first transverse worm gear and the second transverse worm gear are assembled with corresponding guide screws via worm gears to achieve orthogonal rods. Rotation of the first transverse worm gear and the second transverse worm gear drives the corresponding worm gear to rotate, thereby transmitting power to the corresponding guide screw gear.

[0009] Preferably, the worm wheel is arranged transversely with internal and external double threads, the guide screw passes through the middle of the worm wheel and is assembled through the internal thread, and the first transverse worm / second transverse worm is engaged with the worm wheel through the external thread for transmission.

[0010] Preferably, the upper and lower ends of the worm wheel are fixed to the worm gear housing through bearings, and the worm gear housing is fixed to the limit platform. The worm gear housing plays a supporting role, and the bearings are used to ensure the normal rotation of the worm wheel.

[0011] Preferably, a knob is provided at the end of the first transverse worm gear, and the knob facilitates manual application of force to rotate the first transverse worm gear to adjust the distance between the two adjustment platform assemblies.

[0012] Preferably, a stabilizing rod reciprocating through hole is provided in the middle of the limiting platform, and the stabilizing rod can reciprocate up and down along the stabilizing rod reciprocating through hole.

[0013] Preferably, a limiting boss is provided at the lower part of the stabilizing rod, and the limiting boss is located between two limiting platforms. The diameter of the limiting boss is larger than the diameter of the reciprocating through hole of the stabilizing rod, ensuring that the two limiting platforms can limit the limiting boss, that is, limit the stabilizing rod.

[0014] The reciprocating motion displacement loading and control device provided by the present invention has the following beneficial effects:

[0015] 1. Using relays as logic control elements and capacitive position sensors can achieve closed-loop position control.

[0016] 2. The closed-loop control component performs a precise limit on the reciprocating motion of the stabilizer bar. If the control fails, the adjustable lifting platform will perform a second precise limit to achieve double limit.

[0017] 3. The device has low cost, simple operation, flexible stand construction and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the control of the closed-loop control component of the present invention;

[0019] Figure 2 A perspective view of the adjustable lifting platform of the present invention;

[0020] Figure 3 It is a left view of the adjustable lifting platform in the present invention.

[0021] Description of main component symbols:

[0022] 1 Closed-loop control components

[0023] 11 cylinders

[0024] 111 piston

[0025] 12 First capacitive position sensor

[0026] 13 First Time Relay

[0027] 14 First current relay

[0028] 15. Second capacitive position sensor

[0029] 16 Second time relay

[0030] 17 Second current relay

[0031] 18 solenoid valve

[0032] 2 adjustable lifting platforms

[0033] 21 guide screw

[0034] 22 Adjustment platform components

[0035] 221 limit table 222 first transverse worm

[0036] 223 second transverse worm 224 synchronous belt

[0037] 225 Stabilizing rod reciprocating through hole 226 Worm gear housing

[0038] 227 knob

[0039] 3 stabilizer bars

[0040] 31 limiting boss

[0041] 4 Power supply

[0042] 5 Main switch

[0043] 6 counters DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the reciprocating displacement loading and control device provided by the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0046] like Figure 1 and Figure 2 As shown, the present invention provides a reciprocating motion displacement loading and control device, including a closed-loop control component 1 and an adjustable lifting platform 2, both of which can limit the up and down reciprocating motion of the stabilizer bar in the fatigue test.

[0047] like Figure 1As shown, the closed-loop control assembly 1 consists of a cylinder 11, a first capacitive position sensor 12, a first time relay 13, a first current relay 14, a second capacitive position sensor 15, a second time relay 16, a second current relay 17, and a solenoid valve 18. The first capacitive position sensor 12 senses one extreme position of the reciprocating motion of the piston 111, while the second capacitive position sensor 15 senses the other extreme position of the reciprocating motion of the piston 111. The first capacitive position sensor 12, the first current relay 14, the first time relay 13, and the solenoid valve 18 are connected in sequence. The second capacitive position sensor 15, the second current relay 17, the second time relay 16, and the solenoid valve 18 are connected in sequence. The normally open output of the first current relay 14 is connected in parallel with the normally closed input of the second current relay 17, and the normally closed output of the first current relay 14 is connected in parallel with the normally open input of the second current relay 17. The solenoid valve 18 switches the valve core, causing the piston 111 to move in the opposite direction. The piston 111 is connected to the stabilizer bar 3 used in the fatigue test, and the two bars reciprocate synchronously during the fatigue test. In this preferred embodiment, the closed-loop control assembly 1 is controlled by a power supply 4 and a main switch 5 to be turned on or off, facilitating operation and control. The closed-loop control assembly 1 also includes a counter 6 for accumulating the number of reciprocating motions of the piston rod 111 to facilitate test data statistics.

[0048] like Figure 2 and Figure 3 As shown, the stabilizing rod 3 connected to the piston rod 111 is installed in the middle of the adjustable lifting platform 2. The specific structure of the adjustable lifting platform 2 is described below.

[0049] The adjustable lifting platform 2 includes four guide screws 21 and two adjustment platform components 22. The two adjustment platform components 22 are arranged one above the other. The four guide screws 21 are arranged vertically and parallel to each other to connect the two adjustment platform components 22.

[0050] The adjustment platform assembly 22 includes a limit platform 221, a first transverse worm 222, a second transverse worm 223, and a synchronous belt 224 mounted thereon. The limit platform 221 is a square flat plate with a reciprocating through hole 225 for the stabilizing rod in the center and threaded holes at its four corners for mounting with the four lead screws 21. The first transverse worm 222 and the second transverse worm 223 are arranged parallel to each other, and their ends are connected by a synchronous belt 224, forming a belt drive.

[0051] Both ends of the first transverse worm 222 / the second transverse worm 223 are assembled with the corresponding guide screw 21 through a worm gear to form a worm gear structure, so that the rods are orthogonal. Specifically, the worm gear is arranged horizontally with internal and external double threads, the guide screw 21 passes through the middle of the worm gear and is assembled through the internal thread, and the first transverse worm 222 / the second transverse worm 223 is meshed with the worm gear through the external thread. The upper and lower ends of the worm gear are fixed to the worm gear housing 226 through bearings, and the worm gear housing 226 is fixed to the limit platform 221 and can be fixed by bolts or welding. In this preferred embodiment, a knob 227 is provided at the end of the first transverse worm 222 to facilitate manual force to rotate the first transverse worm 222 to adjust the distance between the two adjustment platform assemblies 22.

[0052] In summary, each adjustment platform assembly 22 includes four worm gears, four bearings and four worm gear housings 226, which are installed along the four corners of the limit platform 221. Figure 2 The upper adjustment platform assembly 22, the first transverse worm 222, the second transverse worm 223, the synchronous belt 224 and their assembly parts are all installed on the top of the corresponding limit platform 221, while the lower adjustment platform assembly 22, the first transverse worm 222, the second transverse worm 223, the synchronous belt 224 and their assembly parts are all installed on the bottom of the corresponding limit platform 221, so that the two limit platforms 221 are arranged opposite to each other up and down.

[0053] As previously mentioned, the stabilizer bar 3 passes through two stoppers 221. Its top end is connected to the piston 111, and its lower portion is provided with a stopper boss 31. The stopper boss 31 is screwed onto the stabilizer bar 3. After assembly, the stopper boss 31 is located between the two stoppers 221. A stabilizer bar reciprocating through hole 225 is provided in the middle of each stopper 221, allowing the stabilizer bar 3 to reciprocate up and down along the through hole 225. The diameter of the stopper boss 31 is larger than the diameter of the through hole 225.

[0054] The device of the present invention is applied to a fatigue test bench for a stabilizer bar assembly, and the bottom ends of the four guide screws 21 are fixed. The main switch 5 is started, and the two air pipes of the cylinder 11 start working, causing the piston 111 to start moving. The first capacitive position sensor 12 senses that the position of the piston 111 has been reached, and feeds back the signal to the first current relay 14. The first current relay 14 is normally open and inputs to the first time relay 13 for time delay, ensuring that the piston 111 continues to move to the bottom, eliminating the virtual touch caused by the position sensing error. After the delay ends, the first time relay 13 outputs a signal to the solenoid valve 18, the valve core switches in the reverse direction, and the piston 111 moves in the reverse direction.

[0055] When piston 111 reaches the sensing range of second capacitive position sensor 12, it feeds a signal back to second current relay 17. This normally closed signal outputs to second time relay 16, providing a time delay. This ensures piston 111 continues to move to its final stop, eliminating false touches caused by position sensing errors. After the delay, second time relay 16 outputs a signal to solenoid valve 18, causing the valve core to switch in the opposite direction, causing piston 111 to move in the opposite direction.

[0056] As described above, the closed-loop position control of the reciprocating motion of the piston 111 is realized, that is, the synchronous reciprocating motion of the stabilizing rod 3 connected to the piston 111 is realized, and in the process, the accurate position limit of the stabilizing rod 3 is ensured.

[0057] In actual application, if the closed-loop control component fails and cannot accurately limit the stabilizer bar, the adjustable lifting platform 2 will limit the position. Operation steps and principle: Before the equipment is put into operation, manually turn the knob 227, which will drive the first transverse worm 222, the synchronous belt 224, and the second transverse worm 223 to rotate in sequence. The four worm gears rotate synchronously, cooperating with the corresponding four guide screws 21 to move the limit platform 221 up and down. In this way, the two limit platforms 221 are adjusted to the required test positions. After the test begins, the stabilizer bar 3 moves upward, and the upper limit platform 221 engages the limit boss 31 on the stabilizer bar 3, preventing the stabilizer bar 3 from moving further upward, causing it to reach the target position and achieving the upper limit. Similarly, when the stabilizer bar 3 moves downward, the upper limit platform 221 engages the limit boss 31 on the stabilizer bar 3, preventing the stabilizer bar 3 from moving further downward, causing it to reach the target position and achieving the lower limit.

[0058] It should be noted that the above description is only a preferred embodiment of the present invention and does not limit the scope of implementation of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reciprocating displacement loading and control device, characterized in that: Including closed-loop control components and adjustable lifting platform, The closed-loop control component is composed of a cylinder, a first capacitance position sensor, a first time relay, a first current relay, a second capacitance position sensor, a second time relay, a second current relay and a solenoid valve. The first capacitance position sensor, the first current relay, the first time relay and the solenoid valve are connected in sequence. The second capacitance position sensor, the second current relay, the second time relay and the solenoid valve are connected in sequence. The normally open output of the first current relay is connected in parallel with the normally closed input of the second current relay. The normally closed output of the first current relay is connected in parallel with the normally open input of the second current relay. The first capacitance position sensor and the second capacitance position sensor are used to sense the position of the piston rod of the cylinder during reciprocating motion. The piston rod is connected to a stabilizing rod, and the stabilizing rod is installed in the middle of the adjustable lifting platform. The adjustable lifting platform limits the reciprocating motion of the stabilizing rod.

2. The reciprocating motion displacement loading and control device according to claim 1, characterized in that: The closed-loop control component is controlled to be closed or opened by a power supply and a main switch.

3. The reciprocating motion displacement loading and control device according to claim 1, characterized in that: The closed-loop control component also includes a counter for accumulating the number of reciprocating movements of the piston rod.

4. The reciprocating motion displacement loading and control device according to claim 1, characterized in that: The adjustable lifting platform includes four guide screws and two adjustment platform components. The two adjustment platform components are arranged up and down. The four guide screws are arranged vertically and parallel to each other to connect the two adjustment platform components. The adjustment platform components adopt a worm gear structure, and the distance between the two can be manually adjusted.

5. The reciprocating motion displacement loading and control device according to claim 4, characterized in that: The adjustment platform assembly includes a limit platform and a first transverse worm gear, a second transverse worm gear, and a synchronous belt arranged thereon. The first transverse worm gear and the second transverse worm gear are arranged parallel to each other, and the ends of the two are connected by the synchronous belt. Both ends of the first transverse worm gear / the second transverse worm gear are assembled with the corresponding guide screw through a worm gear to achieve orthogonality of the rods.

6. The reciprocating motion displacement loading and control device according to claim 5, characterized in that: The worm wheel is arranged transversely with internal and external double threads, the guide screw passes through the middle of the worm wheel and is assembled through internal threads, and the first transverse worm / the second transverse worm is meshed and driven with the worm wheel through external threads.

7. The reciprocating motion displacement loading and control device according to claim 6, characterized in that: The upper and lower ends of the worm wheel are fixed on the worm gear housing through bearings, and the worm gear housing is fixed on the limiting platform.

8. The reciprocating motion displacement loading and control device according to claim 5, characterized in that: The end of the first transverse worm is provided with a knob.

9. The reciprocating motion displacement loading and control device according to claim 5, characterized in that: A stabilizing rod reciprocating through hole is provided in the middle of the limiting platform, and the stabilizing rod can reciprocate up and down along the stabilizing rod reciprocating through hole.

10. The reciprocating motion displacement loading and control device according to claim 9, characterized in that: A limiting boss is provided at the lower part of the stabilizing rod, and the limiting boss is located between two limiting platforms. The diameter of the limiting boss is greater than the diameter of the reciprocating through hole of the stabilizing rod.

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