Smooth wiper assembly for heavy truck

Abstract

The utility model relates to a forward wiper assembly for a heavy truck, which comprises a motor, two wiper shafts, a wiper sheet, a wiper arm and a transmission mechanism, an eccentric arm is mounted on an output shaft of the motor, and the eccentric arm is in linkage connection with the wiper shafts through the transmission mechanism. The transmission mechanism comprises a first swing arm, a second swing arm, a first push rod connected with the first swing arm and a second push rod connected with the second swing arm, first ball socket pieces are arranged at the two ends of the first push rod, and second ball socket pieces are arranged at the two ends of the second push rod. A ball body of a first ball head piece on a first swing arm is movably assembled in a ball socket of a first ball socket piece at one end of a first push rod, a ball body of a second ball head piece on a second swing arm is movably assembled in a ball socket of a second ball socket piece at one end of a second push rod, and a ball body A and a ball body B are installed on a transmission shaft on an eccentric arm in series. The ball A is movably assembled in the other first ball socket piece on the first push rod, and the ball B is movably assembled in the other second ball socket piece on the second push rod. And the structure is simplified, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to a vehicle accessory, more specifically a windshield wiper assembly used on a heavy truck. Background Art

[0002] The wiper assemblies used on existing heavy trucks have the defect of high cost. For example, a truck wiper device disclosed in Chinese Patent No. ZL202020164477.4 adopts a motor-driven push rod, which is connected to a special-shaped swing arm connected to one of the wipers. The special-shaped swing arm is connected to a rectangular swing arm on the other wiper via a connecting rod, thereby realizing the motor driving the two wiper blades. There are many parts and components, which increases the cost. Summary of the invention

[0003] The purpose of the utility model invention: to overcome the defects of the prior art, the utility model provides a windshield wiper assembly for heavy trucks, which directly drives the push rods on both sides through the eccentric arm via the motor output shaft and thus drives the swing arm to make a reciprocating motion, and has the advantages of simplified structure and cost saving.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A forward-wiping wiper assembly for a heavy truck comprises a motor, two wiper shafts, a brush blade, a brush arm and a transmission mechanism, wherein each wiper shaft is provided with a brush arm, the brush blade is provided on the brush arm, an eccentric arm is provided on the output shaft of the motor, the eccentric arm and the wiper shaft are linked and connected via the transmission mechanism, the transmission mechanism comprises a first swing arm and a second swing arm which are matched with the two wiper shafts in a one-to-one correspondence, and is characterized in that the transmission mechanism further comprises a first push rod connected with the first swing arm, and a second push rod connected with the second swing arm, both ends of the first push rod are provided with a first ball socket, and both ends of the second push rod are provided with a second ball socket A first ball head component is provided on the first swing arm, and the ball of the first ball head component is movably assembled in the ball socket of the first ball socket component at one end of the first push rod. A second ball head component is provided on the second swing arm, and the ball of the second ball head component is movably assembled in the ball socket of the second ball socket component at one end of the second push rod. A transmission shaft is installed on the eccentric arm, and a ball A and a ball B are serially mounted on the transmission shaft. Ball A is movably assembled in the first ball socket component on the other end of the first push rod opposite to the end connected to the first swing arm, and ball B is movably assembled in the second ball socket component on the other end of the second push rod opposite to the end connected to the second swing arm.

[0006] Preferably, the first ball socket member and the second ball socket member both include a nylon integrally formed ball socket member body having a spherical ring-shaped ball socket, the ball socket member body including an intermediate cylindrical portion, the intermediate cylindrical portion having limit end plates at both axial ends, the outer circumferential surface of the intermediate cylindrical portion having spline teeth, mounting ears are provided at the ends of the first push rod and the second push rod member, the mounting ears have mounting holes, the mounting holes are spline holes, the intermediate cylindrical portion of the ball socket member body is inserted into the mounting hole and is clamped and restricted on the mounting ears by two limit end plates.

[0007] Preferably, the first ball head component and the second ball head component both include a mounting shaft and a sphere mounted on the mounting shaft, an axial limiting ring is provided on the mounting shaft, the mounting shaft is divided into a fixed mounting shaft section and a sphere mounting shaft section by the limiting ring, the sphere is mounted on the sphere mounting shaft section, the fixed mounting shaft section of the first ball head component is fixedly mounted on the first swing arm, the fixed mounting shaft section of the second ball head component is fixedly mounted on the second swing arm, a lower end gasket is provided on the sphere mounting shaft section, the lower end gasket is supported on the axial limiting ring, the sphere is supported on the lower end gasket, a retaining spring groove is provided at the upper end of the sphere mounting shaft section, a retaining spring is installed in the retaining spring groove, and an upper end gasket is provided between the top of the sphere and the retaining spring.

[0008] Preferably, the lower end gasket includes a first gasket and a second gasket which are stacked, and a gas avoidance groove is provided on the spherical mounting shaft section at a position corresponding to the lower end gasket, and the gas avoidance groove is filled with grease.

[0009] Preferably, a barrier gasket is provided between the sphere A and the sphere B.

[0010] Preferably, annular grease grooves are provided on the two axial end faces of the barrier gasket, and the grease grooves cooperate with the end faces of the sphere A and the sphere B.

[0011] By adopting the above technical solution, the motor output shaft directly drives the push rods on both sides (i.e., the first push rod and the second push rod) through the eccentric arm, thereby driving the swing arm to make a reciprocating motion, and finally realizes the synchronous action of driving the two brushes; reduces the parts required for transmission, thereby reducing costs. Two serially mounted balls (i.e., ball A and ball B) and corresponding ball sockets (i.e., the first ball socket and the second ball socket) are used on the transmission shaft to achieve transmission, and the transmission is stable and reliable; at the same time, due to the use of spherical parts, the requirements for the installation position are reduced, which is convenient for installation and use, so that the swing arm can achieve more stable and reliable direct drive of the two push rods.

[0012] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a windshield wiper assembly for a heavy truck according to the utility model;

[0014] Figure 2 For this utility model Figure 1 Schematic diagram of the local structure of part I;

[0015] Figure 3 For this utility model Figure 1 Schematic diagram of the local structure of Part II;

[0016] Figure 4 It is an exploded view of the first ball and socket member (or the second ball and socket member) of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the barrier gasket of the utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the installation shaft of the utility model; DETAILED DESCRIPTION

[0019] See attached Figures 1 to 6The utility model discloses a forward-wiping wiper assembly for a heavy truck, comprising a motor 1, two wiper shafts 2, a brush blade 3, a brush arm 4 and a transmission mechanism. A brush arm 4 is installed on each wiper shaft 2, and the brush blade 3 is installed on the brush arm 4. An eccentric arm 5 is installed on the output shaft of the motor 1. The eccentric arm 5 and the wiper shaft 2 are linked to each other through a transmission mechanism. The transmission mechanism comprises a first swing arm 61 and a second swing arm 62 which are matched with the two wiper shafts 2 in a one-to-one correspondence. The transmission mechanism also comprises a first push rod 63 connected to the first swing arm 61, and a second push rod 64 connected to the second swing arm 62. Both ends of the first push rod 63 are provided with a first ball socket 65, and both ends of the second push rod 64 are provided with a second ball socket 66. A first ball head 67 is provided on a swing arm 61, and the ball of the first ball head 67 is movably assembled in the ball socket of the first ball socket 65 at one end of the first push rod 63. A second ball head 68 is provided on the second swing arm 62, and the ball of the second ball head 68 is movably assembled in the ball socket of the second ball socket 66 at one end of the second push rod 64. A transmission shaft 51 is installed on the eccentric arm 5, and a ball A691 and a ball B692 are mounted on the transmission shaft 51. The ball A691 is movably assembled in the first ball socket at the other end of the first push rod 63 opposite to the end connected to the first swing arm 61, and the ball B692 is movably assembled in the second ball socket at the other end of the second push rod 64 opposite to the end connected to the second swing arm 62. The motor output shaft directly drives the push rods on both sides (i.e., the first push rod and the second push rod) through the eccentric arm, thereby driving the swing arm to make a reciprocating motion, and finally realizes the synchronous action of driving the two brushes; reducing the parts required for transmission, thereby reducing costs. Two balls (i.e., ball A and ball B) mounted in series and corresponding ball sockets (i.e., a first ball socket and a second ball socket) are used on the transmission shaft to achieve stable and reliable transmission. At the same time, due to the use of spherical parts, the requirements for the installation position are reduced, which facilitates installation and use, so that the swing arm can achieve more stable and reliable direct drive of the two push rods.

[0020] To facilitate processing, reduce costs and ensure stable and reliable transmission structure, the first ball socket member 65 and the second ball socket member 66 both include a ball socket member body 6-1 having a spherical ring-shaped ball socket. The ball socket member bodies of the first ball socket member 65 and the second ball socket member 66 are both molded of nylon plastic to reduce friction and reduce costs. The ball socket body 6-1 includes an intermediate cylindrical portion 6-11, and the intermediate cylindrical portion 6-11 is provided with a limit end piece 6-12 at both axial ends, and a spline tooth 6-111 is provided on the outer circumferential surface of the intermediate cylindrical portion 6-11. The first push rod 63 and the second push rod 64 are both provided with a mounting ear piece 6-2 at the end, and the mounting ear piece 6-2 has a mounting hole, and the mounting hole is a spline hole 6-21. The spline teeth and the spline hole cooperate to achieve a more secure and reliable installation of the ball socket. The intermediate cylindrical portion of the ball socket body 6-1 is inserted into the mounting hole and clamped and restricted on the mounting ear piece 6-2 by two limit end pieces 6-12; the spline teeth and the spline hole cooperate to ensure stable and reliable transmission between the ball socket body and the mounting ear piece. The main parts of the first push rod 63 and the second push rod 64 are both U-shaped channel steel in cross section to ensure the strength of the first push rod and the second push rod. In this specific embodiment, the first ball head member 67 and the second ball head member 68 both include a mounting shaft 6-3 and a sphere 6-4 sleeved on the mounting shaft 6-3, the mounting shaft 6-3 is provided with an axial limit ring 6-31, the mounting shaft 6-3 is divided into a fixed mounting shaft section 6-32 and a sphere mounting shaft section 6-33 by the limit ring 6-31, the sphere 6-4 is sleeved on the sphere mounting shaft section 6-33, and the fixed mounting shaft section of the first ball head member 67 is fixed The first ball head 68 is fixedly mounted on the first swing arm 61, and the fixed mounting shaft section of the second ball head 68 is fixedly mounted on the second swing arm 62. A lower end gasket 60 is provided on the ball mounting shaft section 6-33, and the lower end gasket 60 is supported on the axial limit ring 6-31. The ball 6-4 is supported on the lower end gasket 60. A retaining spring groove is provided on the upper end of the ball mounting shaft section 6-33, and a retaining spring is installed in the retaining spring groove. An upper end gasket 6-41 is provided between the top of the ball 6-4 and the retaining spring. The first ball head and the second ball head adopt a spherical sleeve on the shaft, which can better cooperate with the ball ring-shaped ball socket. The separately processed ball has the advantages of high processing accuracy and easy replacement and maintenance.

[0021] In order to increase the service life of the active position, the lower end gasket 60 includes a first gasket 601 and a second gasket 602 stacked together, and an air avoidance groove 6-331 is provided on the ball mounting shaft section 6-33 corresponding to the position of the lower end gasket 60, and the air avoidance groove 6-331 is filled with grease. The stored grease can reduce the friction between the ball and the gasket, thereby making the activity smoother and increasing the service life.

[0022] A barrier washer 6921 is provided between the sphere A 691 and the sphere B 692. An annular grease groove 69211 is provided on the two axial end faces of the barrier washer, and the grease groove 69211 cooperates with the end faces of the sphere A and the sphere B. In this way, the wear between the sphere A and the sphere B is reduced, the service life is increased, and smooth operation is ensured.

Claims

1. A forward-wiping wiper assembly for a heavy truck, comprising a motor, two wiper shafts, a brush blade, a brush arm and a transmission mechanism, wherein each wiper shaft is provided with a brush arm, the brush blade is provided with the brush arm, an eccentric arm is provided with an output shaft of the motor, the eccentric arm and the wiper shaft are linked and connected via a transmission mechanism, the transmission mechanism comprising a first swing arm and a second swing arm corresponding to the two wiper shafts, characterized in that: The transmission mechanism also includes a first push rod connected to the first swing arm, and a second push rod connected to the second swing arm. Both ends of the first push rod are provided with a first ball socket, and both ends of the second push rod are provided with a second ball socket. A first ball head is provided on the first swing arm, and the ball of the first ball head is movably assembled in the ball socket of the first ball socket at one end of the first push rod. A second ball head is provided on the second swing arm, and the ball of the second ball head is movably assembled in the ball socket of the second ball socket at one end of the second push rod. A transmission shaft is installed on the eccentric arm, and a ball A and a ball B are mounted on the transmission shaft in series. Ball A is movably assembled in the first ball socket on the other end of the first push rod opposite to the end connected to the first swing arm, and ball B is movably assembled in the second ball socket on the other end of the second push rod opposite to the end connected to the second swing arm.

2. The heavy truck wiper assembly according to claim 1 is characterized in that: The first ball socket member and the second ball socket member both include a ball socket member body integrally formed of nylon and having a spherical ring-shaped ball socket, the ball socket member body includes an intermediate cylindrical portion, the intermediate cylindrical portion has limit end plates at both axial ends, the outer circumferential surface of the intermediate cylindrical portion is provided with spline teeth, and mounting ears are provided at the ends of the first push rod and the second push rod member, the mounting ears have mounting holes, and the mounting holes are spline holes, the intermediate cylindrical portion of the ball socket member body is inserted into the mounting hole and is clamped and restricted on the mounting ears by two limit end plates.

3. The heavy truck wiper assembly according to claim 1 is characterized in that: The first ball head component and the second ball head component both include a mounting shaft and a sphere mounted on the mounting shaft, an axial limiting ring is provided on the mounting shaft, the mounting shaft is divided into a fixed mounting shaft section and a sphere mounting shaft section by the limiting ring, the sphere is mounted on the sphere mounting shaft section, the fixed mounting shaft section of the first ball head component is fixedly mounted on the first swing arm, the fixed mounting shaft section of the second ball head component is fixedly mounted on the second swing arm, a lower end gasket is provided on the sphere mounting shaft section, the lower end gasket is supported on the axial limiting ring, the sphere is supported on the lower end gasket, a retaining spring groove is provided at the upper end of the sphere mounting shaft section, a retaining spring is installed in the retaining spring groove, and an upper end gasket is provided between the top of the sphere and the retaining spring.

4. The heavy truck wiper assembly according to claim 3 is characterized in that: The lower end gasket comprises a first gasket and a second gasket which are stacked, and an air avoidance groove is arranged on the spherical body mounting shaft section corresponding to the position of the lower end gasket, and the air avoidance groove is filled with grease.

5. The heavy truck wiper assembly according to claim 1 is characterized in that: A barrier gasket is provided between the sphere A and the sphere B.

6. The heavy truck wiper assembly according to claim 5 is characterized in that: The two axial end faces of the barrier washer are provided with annular grease grooves, and the grease grooves are matched with the end faces of the spheres A and B.

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