Motor control structure of pneumatic locomotive window wiper
By improving the structure of the integrated valve block in the air circuit, the problem of "intermittent stoppage" caused by unstable air pressure during the switching process of the windshield wiper in pneumatic vehicles was solved, ensuring the normal operation of the windshield wiper and realizing stable wiping function.
Patent Information
- Application Number
- CN202520556944.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-27
AI Technical Summary
When the existing pneumatic vehicle windshield wipers switch from the stopped position to the running position, the air pressure of the air source is too low or the pipeline is not smooth, causing the two-position five-way valve stem to stop in the middle position of the valve body. This results in the air pressure being unbalanced at both ends of the motor piston body, and the windshield wipers cannot operate normally, causing a "stop-at-the-moment" phenomenon.
A control structure for a pneumatic windshield wiper motor was designed. By improving the structure of the integrated air circuit valve block, the air circuit at the stop position is connected to the right end of the motor cylinder. The direction of the high-pressure airflow is controlled by the integrated air circuit valve block to ensure smooth movement of the piston in different directions and avoid air pressure imbalance.
It effectively solves the problem of windshield wipers stopping midway, ensuring the normal operation of the wipers and avoiding malfunctions caused by unstable air pressure.
Smart Images
Figure CN223825342U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rail transit vehicle technical field especially relates to a pneumatic locomotive wiper motor control structure. BACKGROUND
[0002] The locomotive wiper is the component of cleaning the rainwater and other dirt on the front windshield of the locomotive, and is the important auxiliary equipment for ensuring the safe operation of the locomotive.
[0003] The pneumatic locomotive wiper uses high-pressure gas as the power source for the operation of the wiper, the high-pressure air acts on the pneumatic motor, and the reciprocating movement of the piston rod of the motor drives the wiper wiper to reciprocally wipe the windshield.
[0004] The defects of the prior art are that when the system is converted from the parking position to the running position, the gas in the gas pipe of the parking position needs to be discharged during the operation of the two-position five-way valve rod from the right end position to the left end position, if the gas pressure of the gas source is small or the pipeline of the parking position is not smooth, the exhaust of the pipeline of the parking position is slow, and there is a probability that the two-position five-way valve rod is parked in the middle position of the valve body, at this time, the main gas source pipeline simultaneously admits air to the left and right air paths of the motor, the air pressure at the left and right ends of the piston body of the motor is balanced, and the motor is parked in the middle position and cannot operate, that is, the wiper wiper "stops in the middle". UTILITY MODEL CONTENTS
[0005] The main purpose of the utility model is to provide a pneumatic locomotive wiper motor control structure, so as to effectively solve the problems in the background art.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pneumatic locomotive wiper motor control structure, comprising a gas path integrated valve block and a motor body; the motor body comprises a motor cylinder body, a piston body and a drive shaft, one end of the drive shaft (not shown in the drawing) is fixedly connected with the piston body, the other end is connected with a wiper, and the motor cylinder body is provided with a right cylinder body reversing hole and a left cylinder body reversing hole; the gas path integrated valve block is a two-position five-way valve body, which is internally provided with a two-position five-way valve rod, externally connected with a main gas source air path in the middle, connected with a left cylinder body exhaust air path on the left side, and connected with a right cylinder body exhaust air path on the right side, the two-position five-way valve body is internally provided with a right cylinder body air path and a left cylinder body air path, the right cylinder body air path is in communication with the right cylinder body of the motor cylinder body, the left cylinder body air path is in communication with the left cylinder body of the motor cylinder body, the left end of the gas path integrated valve block is connected with the left cylinder body reversing hole in the middle of the motor cylinder body through a left cylinder body reversing air path, and the right end is connected with the right cylinder body reversing hole in the middle of the motor cylinder body through a right cylinder body reversing air path.
[0007] Preferably, a parking position air path is arranged at the right end of the motor cylinder body and is in communication with the inner cavity of the motor cylinder body.
[0008] Preferably, when the motor piston body runs from left to right ( Figure 6 ), the stop position gas path is closed, high-pressure gas enters the left cylinder gas path from the main gas source path through the gas path integrated valve block, and finally enters the motor left cylinder, pushing the piston body to move to the right. The air in the motor right cylinder is discharged through the right cylinder gas path, the gas path integrated valve block, and the right cylinder exhaust gas path.
[0009] Preferably, when the motor piston body runs from right to left ( Figure 8 ), the stop position gas path is closed, high-pressure gas enters the right cylinder gas path from the main gas source path through the gas path integrated valve block, and finally enters the motor right cylinder, pushing the piston body to move to the left. The air in the motor left cylinder is discharged through the left cylinder gas path, the gas path integrated valve block, and the left cylinder exhaust gas path.
[0010] Preferably, when the motor piston body changes direction from the right end position ( Figure 7 ), the stop position gas path is closed, high-pressure gas enters the motor left cylinder from the main gas source path through the left cylinder gas path. At this time, the piston body is located at the right end of the cylinder, the left cylinder reversing hole is located at the left side of the piston body, high-pressure gas enters the left cylinder reversing gas path from the left cylinder reversing hole, and finally enters the left end cavity of the gas path integrated valve block, pushing the two-position five-way valve rod to move to the right, so that high-pressure gas enters the right cylinder gas path from the main gas source path through the gas path integrated valve block, and finally enters the motor right cylinder, pushing the motor piston body to move to the left.
[0011] Preferably, when the motor piston body changes direction from the left end position ( Figure 9 ), the stop position gas path is closed, high-pressure gas enters the right cylinder gas path from the main gas source path through the gas path integrated valve block, and finally enters the motor right cylinder. At this time, the piston body is located at the left end of the cylinder, the right cylinder reversing hole is located at the right side of the piston body, high-pressure gas enters the right cylinder reversing gas path through the right cylinder reversing hole, and finally enters the right end of the gas path integrated valve block, pushing the two-position five-way valve rod to move to the left, so that high-pressure gas enters the left cylinder gas path from the main gas source path through the gas path integrated valve block, and finally enters the motor left cylinder, pushing the motor piston body to move to the right.
[0012] Preferably, when the rain device control switch is set to the stop position ( Figure 11 ), the system closes the right cylinder gas path, high-pressure gas enters the right side of the motor piston body through the stop position gas path, pushing the piston body to move to the left end, the right cylinder reversing hole is located at the right side of the piston body, high-pressure gas enters the right cylinder reversing gas path through the right cylinder reversing hole, and finally enters the right end of the gas path integrated valve block to form a closed gas path, and the piston body stops moving.
[0013] Preferably, when the rain device control switch is set to the stop position ( Figure 12), the gas path of the parking position is closed, the main gas source gas path enters the left cylinder at the left end of the motor piston body through the gas path integrated valve block and the left cylinder gas path, the piston body is pushed to move rightwards, and the gas in the right cylinder at the right end of the motor piston body is discharged from the right cylinder exhaust gas path through the right cylinder gas path and the gas path integrated valve block.
[0014] The wiper control switch structure schematic diagram of the wiper control switch from the stop gear to the running gear of the utility model is shown in Fig. 13. BRIEF DESCRIPTION OF DRAWINGS
[0015] BRIEF DESCRIPTION OF DRAWINGS Figure 1 The motor body and the gas path integrated valve block structure schematic diagram in the prior art is shown in Fig. 1.
[0016] BRIEF DESCRIPTION OF DRAWINGS Figure 2 The wiper control switch structure schematic diagram in the prior art when the wiper control switch from the stop gear to the running gear is shown in Fig. 2.
[0017] BRIEF DESCRIPTION OF DRAWINGS Figure 3 The wiper control switch structure schematic diagram in the prior art when the wiper control switch from the stop gear to the running gear is shown in Fig. 2.
[0018] BRIEF DESCRIPTION OF DRAWINGS Figure 4 The gas path structure schematic diagram when the motor stops in the prior art is shown in Fig. 3.
[0019] BRIEF DESCRIPTION OF DRAWINGS Figure 5 The motor body and the gas path integrated valve block structure schematic diagram of the utility model is shown in Fig. 4.
[0020] BRIEF DESCRIPTION OF DRAWINGS Figure 6 The motor piston body structure schematic diagram when the motor piston body runs from left to right of the utility model is shown in Fig. 5.
[0021] BRIEF DESCRIPTION OF DRAWINGS Figure 7 The motor piston body structure schematic diagram when the motor piston body runs from right to left of the utility model is shown in Fig. 6.
[0022] BRIEF DESCRIPTION OF DRAWINGS Figure 8 The motor piston body structure schematic diagram when the motor piston body runs from right to left of the utility model is shown in Fig. 6.
[0023] BRIEF DESCRIPTION OF DRAWINGS Figure 9 The motor piston body structure schematic diagram when the motor piston body runs from right to left of the utility model is shown in Fig. 6.
[0024] BRIEF DESCRIPTION OF DRAWINGS Figure 10 The motor piston body structure schematic diagram when the motor piston body runs from right to left of the utility model is shown in Fig. 6.
[0025] BRIEF DESCRIPTION OF DRAWINGS Figure 11 The motor piston body structure schematic diagram when the motor piston body runs from right to left of the utility model is shown in Fig. 6.
[0026] BRIEF DESCRIPTION OF DRAWINGS Figure 12 The wiper control switch structure schematic diagram of the wiper control switch from the stop gear to the running gear of the utility model is shown in Fig. 13.
[0027] BRIEF DESCRIPTION OF DRAWINGS Figure 1—In section 11, the main air source air passage is 1, the right cylinder block exhaust air passage is 2, the air passage integrated valve block is 3, the two-position five-way valve stem is 4, the right cylinder block reversing air passage is 5, the right cylinder block air passage is 6, the right cylinder block reversing hole is 7, the motor cylinder is 8, the piston is 9, the left cylinder block reversing hole is 10, the left cylinder block air passage is 11, the left cylinder block reversing air passage is 12, the stop position air passage is 13, and the left cylinder block exhaust air passage is 14. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0029] Appendix Figure 1 This is a schematic diagram of the existing motor body and air circuit integrated valve block structure, including the air circuit integrated valve block 3 and the motor body; the motor body includes a motor cylinder 8, a piston body 9, and a drive shaft, one end of which is fixedly connected to the piston body 9, and the other end is connected to the wiper. The motor cylinder 8 is provided with a right cylinder reversing hole 7 and a left cylinder reversing hole 10; the air circuit integrated valve block 3 is a two-position five-way valve body, with a two-position five-way valve stem 4 inside and the main air source air circuit connected externally in the middle. 1. The left side connects to the left cylinder exhaust air passage 14, and the right side connects to the right cylinder exhaust air passage 2. A two-position five-way valve body has a right cylinder air passage 6 and a left cylinder air passage 11 in the middle. The right cylinder air passage 6 connects to the right cylinder of the motor cylinder 8, and the left cylinder air passage 11 connects to the left cylinder of the motor cylinder 8. The left end of the integrated valve block 3 is connected to the left cylinder reversing air passage 12 in the middle of the motor cylinder 8 via the left cylinder reversing air passage 12, and the right end is connected to the right cylinder reversing air passage 7 in the middle of the motor cylinder 8 via the right cylinder reversing air passage 5. The left end of the integrated valve block 3 is connected to the stop position air passage 13.
[0030] Appendix Figure 2 This is a schematic diagram of the existing wiper control switch when it is switched from the stop position to the run position. In the stop position, the air passage 13 receives high-pressure air through the main air source passage 1, the air passage integrated valve block 3, and the right cylinder passage 6 into the right cylinder of the motor cylinder 8. Then, it passes through the right cylinder reversing hole 7 and the right cylinder reversing air passage 5 into the right end of the air passage integrated valve block 3, pushing the two-position five-way valve stem 4 to move to the left.
[0031] During the movement of the two-position five-way valve stem 4 from the right end to the left end, the gas in the stop position air pipe needs to be vented. If the air source pressure is low or the stop position pipeline is not smooth, the venting of the stop position pipeline will be slow, and there is a possibility of [missing information]. Figure 3When the two five-way valve stems are stopped in the middle position of the valve body, the main air supply line simultaneously supplies air to the left and right air passages of the motor, causing the air pressure at both ends of the motor piston to be balanced. The piston stops in the middle position of the motor and cannot operate, which is the "mid-stop phenomenon" of the windshield wipers.
[0032] Appendix Figure 4 This is a schematic diagram of the air circuit structure when the wiper is stopped in the prior art. The air circuit 13 in the stop position is connected to the integrated air circuit valve block 3, which can easily cause the "mid-stop phenomenon" of the wiper blades mentioned above.
[0033] Appendix Figure 5 This is a schematic diagram of the structure of the motor body and the integrated valve block of the air circuit of this utility model. The system includes an integrated air circuit valve block 3 and a motor body. The motor body includes a motor cylinder 8, a piston 9, and a drive shaft. One end of the drive shaft (not shown in the attached diagram) is fixedly connected to the piston 9, and the other end is connected to the windshield wiper. The motor cylinder 8 is provided with a right cylinder reversing hole 7 and a left cylinder reversing hole 10. The integrated air circuit valve block 3 is a two-position five-way valve body. It is provided with a two-position five-way valve stem 4 inside and a main air source air circuit 1 in the middle outside. It is connected to the left cylinder exhaust air circuit 14 on the left and the right cylinder exhaust air circuit 2 on the right. The two-position five-way valve body is provided with a right cylinder air circuit 6 and a left cylinder air circuit 11 in the middle. The right cylinder air circuit 6 is connected to the right cylinder of the motor cylinder 8, and the left cylinder air circuit 11 is connected to the left cylinder of the motor cylinder 8. The left end of the integrated air circuit valve block 3 is connected to the left cylinder reversing hole 10 in the middle of the motor cylinder 8 by a left cylinder reversing air circuit 12, and the right end is connected to the right cylinder reversing hole 7 in the middle of the motor cylinder 8 by a right cylinder reversing air circuit 5.
[0034] A stop position air passage 13 is provided at the right end of the motor cylinder 8, which is connected to the inner cavity of the motor cylinder 8.
[0035] When the motor piston moves from left to right (see attached) Figure 6 When the stop position air passage 13 is closed, the high pressure air enters the left cylinder air passage 11 from the main air source air passage 1 through the air passage integrated valve block 3, and finally enters the left cylinder of the motor, pushing the piston body 9 to move to the right. The air in the right cylinder of the motor enters the right cylinder exhaust air passage 2 through the right cylinder air passage 6 through the air passage integrated valve block 3 and is discharged.
[0036] When the motor piston moves from right to left (see attached) Figure 8 When the stop position air passage 13 is closed, the high pressure air enters the right cylinder air passage 6 from the main air source air passage 1 through the air passage integrated valve block 3, and finally enters the right cylinder of the motor, pushing the piston body 9 to move to the left. The air in the left cylinder of the motor enters the left cylinder exhaust air passage 14 through the left cylinder air passage 11 and the air passage integrated valve block 3 and is discharged.
[0037] When the motor piston body reverses direction from the right end (see attached) Figure 7When the stop position air passage 13 is closed, high-pressure air enters the left cylinder of the motor from the main air source air passage 1 through the left cylinder air passage 11. At this time, the piston body 9 is located at the right end of the cylinder body, and the left cylinder reversing hole 10 is located on the left side of the piston body 9. High-pressure air enters the left cylinder reversing air passage 12 from the left cylinder reversing hole 10, and finally enters the left end cavity of the air passage integrated valve block 3, pushing the two-position five-way valve rod 4 to move to the right, so that high-pressure air enters the right cylinder air passage 6 from the main air source air passage 1 through the air passage integrated valve block 3, and finally enters the right cylinder of the motor, pushing the motor piston body to move to the left.
[0038] When the motor piston body reverses direction from the left end (see attached) Figure 9 When the stop position air passage 13 is closed, high-pressure air enters the right cylinder air passage 6 from the main air source air passage 1 through the air passage integrated valve block 3, and finally enters the right cylinder of the motor. At this time, the piston body 9 is located at the left end of the cylinder body, and the right cylinder reversing hole 7 is located on the right side of the piston body 9. High-pressure air enters the right cylinder reversing air passage 5 through the right cylinder reversing hole 7, and finally enters the right end of the air passage integrated valve block 3, pushing the two-position five-way valve rod 4 to move to the left, so that high-pressure air enters the left cylinder air passage 11 from the main air source air passage 1 through the air passage integrated valve block 3, and finally enters the left cylinder of the motor, pushing the motor piston body to move to the right.
[0039] When the rain guard control switch is turned to the off position (see attached) Figure 11 When the system closes the right cylinder block air passage 6, the high-pressure air enters the right side of the motor piston body through the stop position air passage 13, pushing the piston body to the left end. The right cylinder block reversing hole 7 is located on the right side of the piston body 9. The high-pressure air enters the right cylinder block reversing air passage 5 through the right cylinder block reversing hole 7, and finally enters the right end of the air passage integrated valve block 3 to form a closed air passage, and the piston body 9 stops moving.
[0040] When the rain guard control switch is switched from the stop position to the run position ( Figure 12 The main air source air passage 1 enters the left cylinder at the left end of the motor piston body through the air passage integrated valve block 3 and the left cylinder air passage 11, pushing the piston body 9 to move to the right. The gas in the right cylinder at the right end of the motor piston body is discharged from the right cylinder exhaust air passage 2 through the right cylinder air passage 6 and the air passage integrated valve block 3.
[0041] Appendix Figure 10 This is a schematic diagram of the existing technology in the stop position. High-pressure air enters the right cylinder air passage 6 via the main air source passage 1 and the air passage integrated valve block 3, then enters the right cylinder of the motor cylinder 8, and enters the right end of the air passage integrated valve block 3 via the right cylinder reversing air passage 5. This pushes the two-position five-way valve stem 4, opening the stop position air passage 13. The high-pressure air pressure pushes the left end of the two-position five-way valve stem 4, and the pressure of the stop position air passage 13 is the same as that of the main air source passage 1. The two-position five-way valve stem 4 remains stationary in the position shown in the diagram, which is the stop position. However, when this structure returns to the moving position, there is a probability of [something happening]. Figure 3When the two five-way valve stems are stopped in the middle position of the valve body, the main air supply line simultaneously supplies air to the left and right air passages of the motor, causing the air pressure at both ends of the motor piston to be balanced. The piston stops in the middle position of the motor and cannot operate, which is the "mid-stop phenomenon" of the windshield wipers.
[0042] This invention modifies the air passage 13 at the stop position to connect with the right cylinder of the motor cylinder 8, which can avoid the "mid-stop phenomenon" of the windshield wipers.
[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A control structure for a pneumatic vehicle windshield wiper motor, characterized in that: It includes an integrated air circuit valve block and a motor body; the motor body includes a motor cylinder, a piston body, and a drive shaft. One end of the drive shaft is fixedly connected to the piston body, and the other end is connected to the wiper. The motor cylinder is provided with a right cylinder reversing hole and a left cylinder reversing hole. The integrated air circuit valve block is a two-position five-way valve body, with a two-position five-way valve stem inside. The main air source air circuit is connected to the middle externally, the left side is connected to the left cylinder exhaust air circuit, and the right side is connected to the right cylinder exhaust air circuit. The two-position five-way valve body is provided with a right cylinder air circuit and a left cylinder air circuit in the middle. The right cylinder air circuit is connected to the right cylinder of the motor cylinder, and the left cylinder air circuit is connected to the left cylinder of the motor cylinder. The left end of the integrated air circuit valve block is connected to the left cylinder reversing hole in the middle of the motor cylinder by the left cylinder reversing air circuit, and the right end is connected to the right cylinder reversing hole in the middle of the motor cylinder by the right cylinder reversing air circuit.
2. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: A stop position air passage is provided at the right end of the motor cylinder, which is connected to the inner cavity of the motor cylinder.
3. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the motor piston moves from left to right, the stop position air passage is closed. High-pressure air enters the left cylinder air passage from the main air source air passage through the air passage integrated valve block, and finally enters the left cylinder of the motor, pushing the piston to move to the right. The air in the right cylinder of the motor enters the right cylinder exhaust air passage through the right cylinder air passage through the air passage integrated valve block and is discharged.
4. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the motor piston moves from right to left, the stop position air passage is closed. High-pressure air enters the right cylinder air passage from the main air source air passage through the air passage integrated valve block, and finally enters the right cylinder of the motor, pushing the piston to move to the left. The air in the left cylinder of the motor enters the left cylinder exhaust air passage through the left cylinder air passage and the air passage integrated valve block and is discharged.
5. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the motor piston body reverses from the right end position, the stop position air passage is closed. High-pressure air enters the left cylinder of the motor from the main air source air passage through the left cylinder air passage. At this time, the piston body is located at the right end of the cylinder body, and the left cylinder reversing hole is located on the left side of the piston body. High-pressure air enters the left cylinder reversing air passage from the left cylinder reversing hole and finally enters the left end cavity of the air passage integrated valve block, pushing the two-position five-way valve rod to the right. This causes the high-pressure air to enter the right cylinder air passage from the main air source air passage through the air passage integrated valve block and finally enter the right cylinder of the motor, pushing the motor piston body to the left.
6. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the motor piston body reverses direction from the left end, the stop position air passage is closed. High-pressure air enters the right cylinder air passage from the main air source air passage through the air passage integrated valve block, and finally enters the right cylinder of the motor. At this time, the piston body is located at the left end of the cylinder body, and the right cylinder reversing hole is located on the right side of the piston body. High-pressure air enters the right cylinder reversing air passage through the right cylinder reversing hole, and finally enters the right end of the air passage integrated valve block, pushing the two-position five-way valve rod to move to the left, so that high-pressure air enters the left cylinder air passage from the main air source air passage through the air passage integrated valve block, and finally enters the left cylinder of the motor, pushing the motor piston body to move to the right.
7. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the rain guard control switch is turned to the stop position, the system closes the air passage of the right cylinder block. High-pressure air enters the right side of the motor piston body through the stop position air passage, pushing the piston body to the left end. The right cylinder block reversing hole is located on the right side of the piston body. High-pressure air enters the right cylinder block reversing air passage through the right cylinder block reversing hole, and finally enters the right end of the air passage integrated valve block to form a closed air passage, and the piston body stops moving.
8. The pneumatic vehicle windshield wiper motor control structure according to claim 1, characterized in that: When the wiper control switch is switched from the stop position to the run position, the system closes the air circuit in the stop position. The main air source air circuit enters the left cylinder at the left end of the motor piston body through the air circuit integrated valve block and the left cylinder air circuit, pushing the piston body to move to the right. The gas in the right cylinder at the right end of the motor piston body is discharged from the right cylinder exhaust air circuit through the right cylinder air circuit and the air circuit integrated valve block.