A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive

Abstract

The present invention discloses a square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive, which relates to the technical field of transmission and control systems, and comprises a base plate, one end of which is fixedly connected to a mounting plate and two symmetrically arranged limiting side plates, forming an assembly space for a motor housing, the motor housing being penetrated by a rack, and the rack being centered in the motor housing by a connecting rod positioning mechanism; the base plate is fixedly connected to a guide rail, the guide rail is equipped with a positioning support rod to facilitate the assembly of the square shaft gear into the motor housing, the positioning support rod is equipped with a positioning cylinder, and the positioning cylinder can be rotated in the positioning support rod to change the angle of the square shaft gear. The present invention ensures that the rack is quickly and accurately centered in the inner cavity of the motor housing by means of a first positioning clamping plate and a second positioning clamping plate that can be clamped synchronously and symmetrically; the scale value is laser engraved on the positioning support rod, and an arrow is laser engraved on the positioning cylinder, which is convenient for setting the initial installation angle of the square shaft gear.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission and control systems, and in particular is a square shaft gear rack installation and adjustment device for assembling a windshield wiper of a railway locomotive. Background Art

[0002] With the rapid development of railway locomotives, customers demand that the wiping angle of locomotive wipers be expanded and the length of wiper arms be lengthened. The torque value transmitted when the wiper arm cooperates with the gear output end is correspondingly higher. The original wiper drive shaft cooperation structure is a cylindrical spline and a wiper arm. The installation of the rack and gear shaft of this structure has no initial position positioning requirements, and the installation is simple, but the torque carried by this structure is limited.

[0003] In this environment, the square shaft gear of pneumatic wiper came into being. The output end of the square shaft gear adopts the method of matching with the square hole of the wiper arm base, which can bear greater torque. However, there is a problem when installing the square shaft gear: because the square shaft gear and the wiper arm are matched in a square tenon shape, in order to ensure the initial position set by the wiper arm of the locomotive wiper, the square shaft gear needs to be positioned and installed with the rack in a certain initial position in the closed inner cavity of the motor, while the old-fashioned gear cylindrical spline matching with the wiper arm does not have the initial position requirement; and the rack needs to be installed in the inner cavity of the motor first, and then the square shaft gear is installed in the inner cavity of the motor to match the rack for positioning.

[0004] In the prior art, when assembling square shaft gears, fixed-length clamps are used to position the rack in the center of the motor cavity. The assembly master needs to select the corresponding fixed-length clamps according to each rack of different lengths, and select different fixed-length clamps to match different racks. The process is cumbersome and easy to make mistakes. During the initial installation, it is necessary to draw marks on the tooth profiles of the two selected positions of the gear, and then install it into the closed inner cavity of the motor housing to mesh with the rack. This is inefficient and prone to errors. The above-mentioned assembly method is cumbersome, making it impossible to accurately position the initial radial position of the square shaft gear, which easily causes the installed gear and rack to be misaligned.

[0005] Therefore, the present invention provides a square shaft gear rack installation and adjustment device for assembling a railway locomotive wiper to solve the problems raised in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide a square shaft gear rack installation and adjustment device for assembling a windshield wiper of a railway locomotive to solve the following technical problems:

[0007] 1) When assembling the square shaft gear in the prior art, a fixed-length clamp block is used to position the rack in the center of the motor cavity. The manual assembly process is cumbersome and easy to make mistakes;

[0008] 2) During installation in the prior art, it is necessary to draw marks on the tooth profile of the gear at two selected positions, and then install it into the closed inner cavity of the motor housing to mesh with the rack, which is inefficient and prone to errors;

[0009] 3) The existing assembly process is cumbersome, making it impossible to accurately locate the initial radial position of the square shaft gear, which easily causes the installed gear and rack to be misaligned.

[0010] According to one aspect of the present invention, a square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive is provided, comprising a bottom plate, one end of which is fixedly connected to a mounting plate and two symmetrically arranged limiting side plates to form an assembly space for a motor housing, a rack is passed through the motor housing in a vertical direction to the limiting side plates, and the rack is centered in the motor housing through a connecting rod positioning mechanism;

[0011] The other end of the base plate is fixedly connected to a guide rail, and the guide rail is equipped with a positioning support rod and the two form a sliding connection, which is used to drive the square shaft gear to move axially and be assembled into the motor housing. The positioning support rod is equipped with a positioning cylinder for clamping the square shaft gear. The positioning cylinder rotates in the positioning support rod to change the angle of the square shaft gear, so as to facilitate the engagement of the square shaft gear with the rack.

[0012] According to an exemplary embodiment of the present invention, a shaft mounting block and a rotating shaft block are fixed in sequence by bolts on a side of the mounting plate away from the motor housing, the shaft mounting block is provided with a circular through hole parallel to the rack, a guide rod passes through the circular through hole, the shaft mounting block is centrally assembled on the guide rod and the two are rigidly connected.

[0013] According to another exemplary embodiment of the present invention, a rotating shaft is provided at the center position of the rotating shaft block, an intermediate connecting rod is sleeved on the rotating shaft to form a rotating connection, the intermediate connecting rod is axially limited on the rotating shaft block by a nut, and both ends of the intermediate connecting rod are rotatably connected to the side connecting rods.

[0014] According to another exemplary embodiment of the present invention, one end of the two side links away from the middle link is rotatably connected to the first positioning clamp plate and the second positioning clamp plate respectively, the first positioning clamp plate and the second positioning clamp plate are respectively sleeved on the two ends of the guide rod, the first positioning clamp plate and the second positioning clamp plate are both slidably connected to the guide rod through a guide sleeve, and the first positioning clamp plate and the second positioning clamp plate are respectively clamped with the two ends of the rack.

[0015] According to another exemplary embodiment of the present invention, compression springs are sleeved on both sides of the guide rod on the first positioning clamping plate, and a nut is provided at the end of the guide rod on the side sleeved with the compression spring to abut against the compression spring.

[0016] According to another exemplary embodiment of the present invention, the first positioning clamping plate is detachably connected to the cylinder via a transition plate, and the cylinder is fixed to the bending plate via screws.

[0017] According to another exemplary embodiment of the present invention, one end of the bending plate is detachably connected to the bottom plate via screws, and a two-position five-way solenoid valve is fixed to the other end of the bending plate via screws.

[0018] According to another exemplary embodiment of the present invention, the positioning tube is engraved with an indicating arrow by laser, and the positioning support rod is engraved with a scale value matching the indicating arrow by laser.

[0019] According to another exemplary embodiment of the present invention, the cross-section of the positioning cylinder is circular on the outside and square on the inside, and the square through hole inside the positioning cylinder is adapted to the square shaft gear.

[0020] According to another exemplary embodiment of the present invention, a threaded through hole is provided on the side wall of the circular through hole of the positioning support rod, and a fastening screw is installed in the threaded through hole.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention ensures the center positioning of racks with different length parameters during clamping and installation by means of a first positioning clamp plate and a second positioning clamp plate that can be clamped synchronously and symmetrically, and ensures that the rack is quickly and accurately centered in the inner cavity of the motor housing, thereby solving the problem of cumbersome steps when using a series of fixed-length clamps to position racks with different length parameters in the early stage, and the problem that the rack is easy to shake when clamping and positioning.

[0023] 2. The present invention arranges guide sleeves on the first positioning card plate and the second positioning card plate, so that the first positioning card plate and the second positioning card plate can slide freely on the guide rod; cylindrical helical compression springs are arranged on both sides of the first positioning card plate, so as to achieve buffering of the positioning card assembly during clamping.

[0024] 3. The present invention opens a circular hole in the positioning support rod, and positioning cylinders of different specifications can be installed in the circular hole. By modularly replacing the positioning cylinders of different sizes embedded in the positioning support rod, installation with square shaft gears of different specifications can be achieved, thereby achieving universal use; scale values ​​are engraved on the positioning support rod using a laser, and arrows are engraved on the positioning cylinder by laser. When the positioning cylinder is rotated to different positions, the angle indicated by the arrow is the rotation angle of the positioning cylinder; a square hole is opened on the positioning cylinder to match the square tenon of the square shaft gear, so as to locate the initial angle of installation of the square shaft gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of a square shaft gear rack installation adjustment device for assembling a windshield wiper for a railway locomotive;

[0027] Figure 2 It is a schematic diagram of the overall structure of a square shaft gear rack installation adjustment device for assembling a windshield wiper of a railway locomotive;

[0028] Figure 3 A top view of a square shaft gear rack installation adjustment device for assembling a windshield wiper for a railway locomotive;

[0029] Figure 4 A side view of a square shaft gear rack installation adjustment device for assembling a railway locomotive wiper.

[0030] In the figure: 1. bottom plate; 2. guide rail; 3. positioning support rod; 4. positioning cylinder; 5. fastening screw; 6. motor housing; 7. rack; 8. square shaft gear; 9. mounting plate; 10. limit side plate; 11. shaft mounting block; 12. rotating shaft block; 13. guide rod; 14. first positioning clamping plate; 15. compression spring; 16. second positioning clamping plate; 17. transition plate; 18. cylinder; 19. middle connecting rod; 20. side connecting rod; 21. bending plate; 22. two-position five-way solenoid valve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further specifically described below through embodiments and in combination with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention, and should not be understood as limiting the square shaft gear rack installation adjustment device for assembling a railway locomotive wiper of the present invention.

[0032] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0033] According to an overall technical concept of the present invention, Figure 1-4As shown, a square shaft gear rack installation and adjustment device for assembling a windshield wiper of a railway locomotive is provided, comprising a base plate 1, two symmetrically arranged limiting side plates 10 and a mounting plate 9 to form a cavity in which a motor housing 6 is placed, which is used to locate the position of the motor housing 6. A shaft mounting block 11 and a rotating shaft block 12 are mounted on the mounting plate 9 together with a hexagonal head bolt M6×45 on the rear side of the mounting plate 9. The center lines of the mounting plate 9, the shaft mounting block 11 and the rotating shaft block 12 are now on the same plane, which sets a center reference when the connecting rod mechanism rotates around the axis of the rotating shaft block 12. The shaft mounting block 11 is provided with a circular through hole parallel to the rack 7, and a guide rod 13 passes through the circular through hole. The shaft mounting block 11 is centrally assembled on the guide rod 13 and the two are rigidly connected. A washer 24×16.5×2.5 and a shaft elastic retaining ring 16A type are installed on one side of the shaft mounting block 11 to fix the guide rod 13 in the shaft mounting block 11.

[0034] The cylindrical helical compression spring 15 is installed to the left side of the guide rod 13, and then the first positioning clamp plate 14 and the second positioning clamp plate 16 are installed on the left and right sides of the guide rod 13. The advantage of this structure is that the first positioning clamp plate 14 and the second positioning clamp plate 16 can move left and right on the guide rod 13, thereby realizing the universal installation of racks 7 of different lengths. The guide rod 13 is provided with compression springs 15 on both sides of the first positioning clamp plate 14, and the end of the guide rod 13 on one side of the compression spring 15 is provided with a nut that abuts the compression spring 15. The intermediate connecting rod 19 is installed on the rotating shaft of the rotating shaft block 12, and the two side connecting rods 20 are respectively connected to the first positioning clamp plate 14 and the second positioning clamp plate 16 on both sides, and then the side connecting rod 20 is connected to the intermediate connecting rod 19. The advantage of this structure is that by setting a connecting rod mechanism, it is ensured that when the first positioning clamp plate 14 and the second positioning clamp plate 16 move in relative or opposite directions along the guide rod 13, the workpiece rack 7 to be clamped is synchronously clamped or released.

[0035] Install the bending plate 21 to the rear side of the mounting plate 9, install the cylinder 18 on the bending plate 21, install the transition plate 17 at the push rod of the cylinder 18, connect and install the transition plate 17 to the first positioning card plate 14, transfer the thrust of the cylinder 18 to the first positioning card plate 14 through the transition plate 17, and install a two-position five-way solenoid valve 22 and its joints, air pipes and other accessories on the bending plate 21.

[0036] The linear guide rail 2 is installed on the upper surface of the front end of the base plate 1, the positioning support rod 3 is installed on the guide rail 2, and the positioning cylinder 4 is installed in the positioning support rod 3. A square hole is provided in the positioning cylinder 4 to cooperate with the output end of the square shaft gear 8. The advantage of this installation method of the positioning cylinder 4 is that the installation of square shaft gears 8 with different square tenon sizes can be adapted by replacing the positioning cylinders 4 of different specifications and sizes. The cross-section of the positioning cylinder 4 is an outer circle and an inner square. The square through hole inside the positioning cylinder 4 is adapted to the square shaft gear 8. A threaded through hole is provided on the side wall of the circular through hole of the positioning support rod 3. The threaded through hole is equipped with a fastening screw 5. An arrow is laser engraved on one side of the vertical square hole on the positioning cylinder 4 and through the center of the positioning cylinder 4. The angle is laser engraved in the circumferential direction of the hole where the positioning cylinder 4 is installed on the positioning support rod 3. The advantage of this structure is that when the positioning cylinder 4 rotates in the positioning support rod 3, the rotation angle of the positioning cylinder 4 can be read, which is convenient for setting the initial installation angle of the square shaft gear 8.

[0037] Next, the determination of the initial angle of the square shaft gear 8 according to the wiper wiping angle is described:

[0038] There are two situations for setting the initial angle of the square shaft gear 8: one is the curved tube scraper arm (taking the double-decker EMU pneumatic wiper as an example), and the other is the straight scraper arm (taking the Philippine EMU pneumatic wiper as an example). For the two different scraper arm forms, the initial angle setting methods of the square shaft gear 8 during installation are different.

[0039] The wiping angle range of the pneumatic wiper of a double-decker EMU is 66±5 degrees. When the wiper arm is at the rightmost end of the figure, the angle of the square hole of the wiper arm base is horizontal. When the wiper arm wipes to the middle position, the corresponding angle of the square shaft gear 8 also rotates 33 degrees. At this time, the device angle is set to half of the wiping range, and it can also be set directly by referring to the angle of the drive assembly assembly. The wiper arm of the pneumatic wiper of the Philippines EMU is a straight wiper arm with a wiping angle of 72±3 degrees. In this case, the angle of the square shaft gear 8 is set to 45 degrees on the device.

[0040] Below, the working principle of the present invention is described:

[0041] First, use the positioning support rod 3 to position the angle of the square shaft gear 8. When positioning, point the arrow of the positioning tube 4 to the 33° scale in advance, and tighten the locking bolts on both sides of the positioning tube 4; then, place the motor housing 6 in the assembly space formed by the base plate 1, two symmetrically arranged limiting side plates 10 and the mounting plate 9, and reserve a gap of about 10-15mm between the rear side of the motor housing 6 and the rear baffle of the device (the gap is preferably pre-placed in the inner cavity of the motor), and then pre-place the rack 7 in the motor housing 6; then, gently move the motor housing 6 backwards so that the rear side of the motor housing 6 is close to the rear baffle of the device; then, connect the air pipe, power on the device, press the switch, so that the first A positioning card plate 14 and a second positioning card plate 16 automatically position the rack 7 at the center of the motor cavity; then, install the square shaft gear 8 from the left side of the gear shaft into the positioning tube 4; since the square shaft gear 8 is in a cantilevered state, gently lift the square shaft gear 8 upwards a little during installation, and then install the square shaft gear 8 into the motor cavity along the ball guide rail 2 by forming a support rod to which the square shaft gear 8 is fixed; after the square shaft gear 8 is installed in place, turn the switch to the position in which the first positioning card plate 14 and the second positioning card plate 16 are released, and then move the support rod along the guide rail 2; finally, remove the motor housing 6, square shaft gear 8 and rack 7 that have been positioned and installed as a whole from the device.

[0042] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive, characterized in that: include: A base plate (1), one end of the base plate (1) being fixedly connected to a mounting plate (9) and two symmetrically arranged limiting side plates (10), forming an assembly space for a motor housing (6), a rack (7) penetrating the motor housing (6) and the limiting side plates (10) in a vertical direction, the rack (7) being maintained at a central position in the motor housing (6) by a connecting rod positioning mechanism; The other end of the base plate (1) is fixedly connected to a guide rail (2), and the guide rail (2) is equipped with a positioning support rod (3) and the two are slidably connected to drive the square shaft gear (8) to move axially and be assembled into the motor housing (6). The positioning support rod (3) is equipped with a positioning cylinder (4) for clamping the square shaft gear (8). The positioning cylinder (4) rotates in the positioning support rod (3) to change the angle of the square shaft gear (8) to facilitate the engagement of the square shaft gear (8) with the rack (7); A shaft mounting block (11) and a rotating shaft block (12) are fixed in sequence via bolts on a side of the mounting plate (9) away from the motor housing (6); A rotating shaft is provided at the center of the rotating shaft block (12), and an intermediate connecting rod (19) is sleeved on the rotating shaft to form a rotating connection. The intermediate connecting rod (19) is axially limited on the rotating shaft block (12) by a nut, and both ends of the intermediate connecting rod (19) are rotatably connected to the side connecting rods (20); One end of the two side links (20) away from the middle link (19) is rotatably connected to the first positioning clamp (14) and the second positioning clamp (16), respectively; the first positioning clamp (14) and the second positioning clamp (16) are respectively sleeved on the two ends of the guide rod (13); the first positioning clamp (14) and the second positioning clamp (16) are both slidably connected to the guide rod (13) via a guide sleeve; the first positioning clamp (14) and the second positioning clamp (16) are respectively clamped to the two ends of the rack (7); The positioning cylinder (4) is engraved with an indicating arrow by means of laser marking, and the positioning support rod (3) is engraved with a scale value matching the indicating arrow by means of laser marking.

2. A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive according to claim 1, characterized in that: The shaft mounting block (11) is provided with a circular through hole parallel to the rack (7), a guide rod (13) passes through the circular through hole, the shaft mounting block (11) is centrally mounted on the guide rod (13), and the two are rigidly connected.

3. A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive according to claim 1, characterized in that: The guide rod (13) is sleeved with compression springs (15) on both sides of the first positioning clamping plate (14); and the end of the guide rod (13) on the side sleeved with the compression spring (15) is provided with a nut that abuts against the compression spring (15).

4. A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive according to claim 1, characterized in that: The first positioning clamping plate (14) is detachably connected to the cylinder (18) via a transition plate (17), and the cylinder (18) is fixed to the bending plate (21) via screws.

5. The square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive according to claim 1, characterized in that: The cross section of the positioning cylinder (4) is circular on the outside and square on the inside, and the square through hole inside the positioning cylinder (4) is adapted to fit the square shaft gear (8).

6. A square shaft gear rack installation and adjustment device for assembling a windshield wiper for a railway locomotive according to claim 1, characterized in that: A threaded through hole is provided on the side wall of the circular through hole of the positioning support rod (3), and a fastening screw (5) is mounted on the threaded through hole.

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