Self-lubricating wiper motor

Abstract

The utility model discloses a self-lubricating wiper motor which comprises a rack, a driving motor is arranged on one side of the rack, and the driving motor is fixedly connected with the rack; one end of the driving motor is connected with a worm, and a bearing seat is arranged between the worm and the rack; a worm gear is cooperatively arranged on the upper side of the worm; a mounting frame is arranged at the eccentric position of the worm gear, a connecting rod is hinged to the mounting frame, and a pressing plate is fixedly connected to one end of the connecting rod; a fixing plate is arranged on the side, close to the bearing seat, of the tail end of the rack, a box is fixedly arranged on the fixing plate, a piston plate is arranged on the box, and a piston rod is connected with a driving plate. The box body is connected with an output pipe; when the connecting rod swings, the pressing plate can push the driving plate, so that the piston plate pushes lubricating oil in the box body to flow to the connecting position of the bearing seat and the worm through the output pipe. The self-lubricating wiper motor has the following beneficial effects: the self-lubricating wiper motor can lubricate the bearing of the worm when the worm rotates, so that the situation that the worm bearing fails to lubricate after being used for a period of time is prevented.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a self-lubricating windshield wiper motor. Background Art

[0002] The wiper motor is an important safety component of the car. It is mainly used to drive the wiper to remove rain and snow from the windshield to ensure the driver's clear vision. With the development of the automobile industry, modern wiper motors have developed into a complex electromechanical system integrating motor drive, reduction transmission, and connecting rod mechanism. The wiper motors on the market currently mainly adopt the design of permanent magnet DC motors with worm gear reduction mechanisms, which include core components such as the motor body, reduction mechanism, output shaft and its bearing system.

[0003] Existing wiper motors face severe working environments and operating conditions during actual use. Wipers need to work in all-weather environments and withstand harsh conditions such as high temperature, low temperature, and humidity. Especially in rainy and snowy weather, the wiper's operating frequency usually reaches 50-70 times / minute, and it starts and stops frequently, and the workload will also change significantly with weather conditions.

[0004] However, there is a prominent technical problem in the existing wiper motors, namely, the lack of reliability of the worm bearing system. Since the wiper needs to perform high-frequency reciprocating motion when working, the speed of the worm bearing is the fastest among all components, so it is subjected to continuous and large alternating loads, which makes the lubricating oil film easily damaged. The traditional lubrication method mainly relies on the grease filled during the initial assembly to maintain, but under the dual effects of high-frequency motion and temperature changes, the grease is prone to aging, decomposition or loss.

[0005] Wiper motors are often exposed in the engine compartment and need to withstand a variety of adverse factors such as high temperature, moisture, dust, etc. When the lubrication of the bearing fails, the direct contact between the metal surfaces will cause severe wear. This wear will increase the bearing clearance, causing problems such as unstable operation and increased noise. In severe cases, it will cause the bearing to fail completely, and the entire wiper motor needs to be disassembled and replaced, which not only increases maintenance costs, but also affects driving safety. Utility Model Content

[0006] The utility model aims to provide a self-lubricating wiper motor, which can lubricate the bearing of the worm when the worm rotates, thereby preventing the worm bearing from failing in lubrication after a period of use.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A self-lubricating wiper motor comprises: a frame, a driving motor is arranged on one side of the frame, and the driving motor is fixedly connected to the frame; a worm is connected to one end of the driving motor, and a bearing seat is arranged between the worm and the frame; a worm wheel is arranged on the upper side of the worm; a mounting frame is arranged at an eccentric position of the worm wheel, a connecting rod is hinged on the mounting frame, and a pressure plate is fixedly connected to one end of the connecting rod; a fixing plate is arranged on the side of the end of the frame close to the bearing seat, a box filled with lubricating oil is fixedly arranged on the fixing plate, a piston plate is arranged on the box, and the piston plate is connected to the driving plate through a piston rod; an output pipe is connected to the bottom of the box, and one end of the output pipe extends to the connecting position of the bearing seat and the worm; when the connecting rod swings, the pressure plate can push the driving plate, so that the piston plate pushes the lubricating oil in the box to flow to the connecting position of the bearing seat and the worm through the output pipe.

[0009] The utility model is further configured as follows: a swing rod is hinged at one end of the connecting rod, and an output shaft is fixedly connected to one side of the swing rod.

[0010] The utility model is further configured as follows: one side of the top of the box body is hollowed out, a piston plate is sealingly and slidably connected to the box body, and one end of the driving plate passes through the edge of the box body.

[0011] The utility model is further configured as follows: a connecting piece is disposed on the outer sleeve of the output pipe, and the connecting piece is fixedly connected to the bearing seat.

[0012] The utility model is further configured as follows: it also includes an oil storage tank, the oil storage tank is fixedly arranged on the frame, and an input pipe is connected between the oil storage tank and the box body.

[0013] The utility model is further configured as follows: the input pipe and the output pipe are both arranged at one side close to the bottom of the box body, and a one-way valve is arranged between the input pipe and the output pipe and the box body.

[0014] The utility model is further configured as follows: a spring is arranged between the bottom of the piston plate and the box body.

[0015] The utility model is further configured as follows: the output shaft passes through one end of the frame and can be connected to a wiper. The utility model is further configured as follows:

[0016] The utility model is further configured such that when the driving plate abuts against the top edge of the box body, the pressing plate is separated from the driving plate.

[0017] The utility model is further configured that: when the pressing plate is separated from the driving plate, the spring drives the piston plate to reset, so that the lubricating oil in the oil storage tank enters the box body through the input pipe for replenishment.

[0018] In summary, the utility model has the following beneficial effects:

[0019] By setting a box filled with lubricating oil on the frame, and using the pushing effect of the pressure plate on the drive plate during the swing of the connecting rod, the piston plate generates pressure on the lubricating oil in the box, so that the lubricating oil flows through the output pipe to the connection position between the bearing seat and the worm for lubrication. At the same time, an oil storage tank is set on the frame. When the pressure plate is separated from the drive plate, the piston plate is reset under the action of the spring. At this time, the lubricating oil in the oil storage tank enters the box through the input pipe for replenishment. This design uses the movement of the wiper motor itself to achieve automatic lubrication without the need for an additional power source, and solves the technical problem that the grease of the worm bearing in the traditional wiper motor is prone to aging, decomposition or loss under the dual effects of high-frequency movement and temperature changes. The one-way valve setting on the input pipe and the output pipe ensures the reliable operation of the lubrication system, effectively prolongs the service life of the wiper motor, reduces maintenance costs, and improves driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 It is a rear view structural schematic diagram of an embodiment;

[0022] Figure 3 for Figure 2 The front view after removing part of the rack;

[0023] Figure 4 for Figure 3 Schematic diagram of the structure;

[0024] Figure 5 for Figure 4 A magnified image of area A.

[0025] Figure numerals: 1, frame; 2, driving motor; 3, worm; 4, bearing seat; 5, worm wheel; 6, mounting frame; 7, connecting rod; 8, rocker arm; 9, output shaft; 10, pressure plate; 11, fixing plate; 12, housing; 13, piston plate; 14, piston rod; 15, driving plate; 16, output pipe; 17, connecting piece; 18, oil storage tank; 19, input pipe. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0028] In the description of the present utility model, "multiple" means two or more than two, unless otherwise clearly specified and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1 , Figure 2 As shown, a self-lubricating wiper motor includes a frame 1. A driving motor 2 is arranged on one side of the frame 1, wherein the driving motor 2 is fixedly connected to the frame 1. A worm 3 is connected to one end of the driving motor 2. A bearing seat 4 is arranged between the worm 3 and the frame 1. When the driving motor 2 is working, it can drive the worm 3 to rotate at a high speed. A worm wheel 5 is arranged on the upper side of the worm 3. When the worm 3 rotates, it can drive the worm wheel 5 to rotate.

[0031] like Figure 3As shown, a mounting frame 6 is provided at the eccentric position of the worm wheel 5. A connecting rod 7 is hinged on the mounting frame 6. A swing rod 8 is hinged at one end of the connecting rod 7. An output shaft 9 is fixedly connected to one side of the swing rod 8. The output shaft 9 passes through one end of the frame 1 and can be connected to a corresponding wiper. As mentioned above, when the driving motor 2 is working, it can drive the worm 3 to rotate, and then drive the worm wheel 5 to rotate. When the worm wheel 5 rotates, the mounting frame 6 at the eccentric position can rotate around the center of the worm wheel 5. At this time, the connecting rod 7 hinged to the mounting frame 6 swings around the center of the worm wheel 5. The connecting rod 7 drives the swing rod 8 to swing back and forth, and then the output shaft 9 connected to the swing rod 8 swings back and forth. After the wiper is installed, the wiper can fully clean the car glass.

[0032] like Figure 3 , Figure 4 , Figure 5 As shown, correspondingly, a pressure plate 10 is fixedly connected to one end of the connecting rod 7. Correspondingly, a fixing plate 11 is provided on one side of the end of the frame 1 close to the bearing seat 4. A box body 12 filled with lubricating oil is fixedly provided on the fixing plate 11. One side of the top of the box body 12 is hollowed out, and a piston plate 13 is sealingly and slidingly connected to the box body 12. A piston rod 14 is connected to the top of the piston plate 13, and the piston rod 14 is fixedly connected to a driving plate 15. One end of the driving plate 15 passes through the edge of the box body 12. An output pipe 16 is connected to one side of the bottom of the box body 12. A connecting piece 17 is provided on the outer sleeve of the output pipe 16. The connecting piece 17 is fixedly connected to the bearing seat 4. One end of the output pipe 16 is placed at the connecting position between the bearing seat 4 and the worm 3.

[0033] Correspondingly, an oil storage tank 18 is fixedly arranged on the frame 1. An input pipe 19 is connected between the oil storage tank 18 and the box body 12. The input pipe 19 and the output pipe 16 are both arranged on one side close to the bottom of the box body 12 and a one-way valve (not shown in the figure) is arranged between the input pipe 19 and the output pipe 16.

[0034] As mentioned above, when the worm 3 rotates under the action of the driving motor 2, the connecting rod 7 can swing around the center of the worm wheel 5. At this time, when the connecting rod 7 swings to make the pressure plate 10 abut against the driving plate 15, the driving plate 15 moves downward under the action of the pressure plate 10, so that the lubricating oil in the box body 12 flows out from the output pipe 16 under the pressure of the piston plate 13 and enters the connection position between the bearing seat 4 and the worm 3, thereby self-lubricating the worm 3 and the bearing seat 4. When the driving plate 15 abuts against the top edge of the box body 12, the pressure plate 10 and the driving plate 15 are separated.

[0035] Optimally, a spring (not shown) is provided between the bottom of the piston plate 13 and the box body 12. When the pressure plate 10 is disengaged from the drive plate 15, the spring drives the piston plate 13 to reset, and the lubricating oil in the oil storage tank 18 enters the box body 12 along the input pipe 19 to replenish the lubricating oil in the box body 12.

[0036] Through the above arrangement, a certain amount of lubricating oil can be added to the connection position between the bearing seat 4 and the worm 3 each time when the wiper swings back and forth, thereby realizing a self-lubricating function and preventing the lubrication failure of the bearing seat 4.

[0037] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A self-lubricating wiper motor, characterized in that: include: The cam is provided with a toothed frame, and a toothed frame is provided with a toothed frame, and a toothed frame is provided with a toothed frame. The toothed frame is provided with a toothed frame, and a toothed frame is provided with a toothed frame.

2. A self-lubricating wiper motor according to claim 1, characterized in that: A swing rod is hinged at one end of the connecting rod, and an output shaft is fixedly connected to one side of the swing rod.

3. The self-lubricating wiper motor according to claim 1, characterized in that: One side of the top of the box body is hollowed out, the piston plate is sealingly and slidably connected to the box body, and one end of the driving plate passes through the edge of the box body.

4. The self-lubricating wiper motor according to claim 1, characterized in that: The output pipe is outer-circuited with a connecting piece, and the connecting piece is fixedly connected to the bearing seat.

5. The self-lubricating wiper motor according to claim 1, characterized in that: It also includes an oil storage tank, which is fixed on the frame, and an input pipe is connected between the oil storage tank and the box body.

6. The self-lubricating wiper motor according to claim 5, characterized in that: The input pipe and the output pipe are both arranged on one side close to the bottom of the box body and a one-way valve is arranged between the input pipe and the output pipe and the box body.

7. The self-lubricating wiper motor according to claim 1, characterized in that: A spring is arranged between the bottom of the piston plate and the box body.

8. The self-lubricating wiper motor according to claim 2, characterized in that: One end of the output shaft passing through the frame can be connected to a wiper.

9. The self-lubricating wiper motor according to claim 1, characterized in that: When the driving plate abuts against the top edge of the box body, the pressing plate is separated from the driving plate.

10. The self-lubricating wiper motor according to claim 7, characterized in that: When the pressing plate is separated from the driving plate, the spring drives the piston plate to return to its original position, so that the lubricating oil in the oil storage tank enters the box body through the input pipe for replenishment.

Images