Windshield assembly for vehicle

Abstract

The utility model relates to a windshield assembly for a vehicle. The windshield assembly comprises a windshield, a connecting rod mechanism and a driving mechanism, the core is that a square rod is linked with a driving mechanism and a connecting rod mechanism to realize automatic adjustment of the windshield: the square rod is in surface contact fit with a first square hole of a driving swing arm to solve the problems of idling, lagging and abrasion; the bottom support is a high-rigidity frame formed by a main mounting block, a connecting plate and a cylindrical connecting body; the driving mechanism comprises a multi-stage worm and gear assembly protected by an outer cover, a second square hole of an output worm gear is matched with a square rod, and transmission is stable; the connecting rod mechanism comprises a driving swing arm, a driven swing arm and a connecting rod, the connecting rod lengthens the distance between the driving swing arm and the windshield, the windshield lifting track is closer to a straight line, and the adjusting span is large. The supporting frame improves the strength of the windshield, the hinge joint is tightly matched and kept in a state, and requirements of different heights are met.

Description

Technical Field

[0001] The utility model particularly relates to a vehicle windshield assembly. Background Art

[0002] A windshield, also known as a windshield, is a transparent, airflow-rectifying protective structure in front of the driver's seat. Currently, motorcycles, especially police motorcycles, are often equipped with windshields to protect the driver from windblown sand and other debris while the motorcycle is moving forward. However, motorcycle windshields are typically fixed and non-adjustable, failing to meet the comfort and safety requirements of riders of varying heights.

[0003] To address the aforementioned issues, a utility model patent application, publication number CN217146241U, discloses a motorcycle windshield control device comprising a base, two four-bar linkages symmetrically arranged on the base, and a numerical control module. The four-bar linkage comprises an active swing arm hinged to the base, a passive swing arm hinged to the base, and a support arm connecting the active and passive swing arms. The windshield is mounted on the support arm. The output end of the motor is linked to a worm gear transmission system, which in turn is linked to a drive shaft, which in turn is linked to the active swing arm. The motor drives the drive shaft through the worm gear transmission system, which in turn drives the active swing arm to swing, thereby achieving windshield adjustment.

[0004] However, this windshield control device has the following technical problems: (1) The drive shaft is a conventional circular structure and requires a spline to achieve linkage with the active swing arm to transmit torque. However, there is a radial gap between the circular drive shaft and the active swing arm. In particular, the wear between the active swing arm and the drive shaft after rotation increases, resulting in "idle rotation" or "torque transmission lag" between the drive shaft and the active swing arm. (2) Because each end of the drive shaft is linked to a set of active swing arms, the drive shaft will deform due to torque, and even the gaps at both ends of the drive shaft will be inconsistent. This directly leads to inconsistent rotation angles of the active swing arms at both ends and poor synchronization, which directly affects the windshield's working angle and prevents it from being adjusted to the desired position. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the above-mentioned existing technologies and provide a vehicle windshield assembly. The driving mechanism drives the square rod to rotate, and the square rod drives the connecting rod mechanism to adjust the windshield. The square structure has a stable transmission, solves the existing spline idling, hysteresis and wear, and prevents the windshield from being misadjusted or tilted.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vehicle windshield assembly, comprising a windshield and a connecting rod mechanism, wherein the power output of the connecting rod mechanism is linked to the windshield, and is characterized in that the power input of the connecting rod mechanism is linked to a square rod, and the square rod is linked to a driving mechanism capable of driving the square rod to rotate.

[0007] Using this technical solution, the drive mechanism rotates the square rod, which in turn drives the connecting rod mechanism to adjust the windshield. The square rod's square shape ensures more stable and efficient force transmission, eliminating the issues of idle rotation, lag, and wear associated with the original spline connection. Furthermore, the rod's increased torsional rigidity ensures synchronization between the active swing arms on both sides, preventing the windshield from being misadjusted or tilted.

[0008] The above-mentioned vehicle windshield assembly can be further configured as follows: the connecting rod mechanism includes an active swing arm and a base bracket installed on the vehicle body, the two ends of the square rod are rotatably connected to the base bracket, and the end of the active swing arm is provided with a first square hole that is sleeved on the outer periphery of the square rod and adapted to the square rod.

[0009] With this technical solution, the first square hole in the active swing arm and the square perimeter of the square rod form a "surface-to-surface" fit. When the drive mechanism rotates the rod, the side of the rod directly pushes against the inner surface of the hole, instantly transmitting torque to the active swing arm with zero idle travel. Even if wear and tear develops a slight gap after long-term use, the remaining contact surface on the four sides of the rod maintains torque transmission, resolving the issues of idle rotation and hysteresis found in existing technologies. The base bracket is used for final assembly of the automotive windshield and mounting it on the vehicle body.

[0010] The above-mentioned vehicle windshield assembly can be further configured as follows: the base bracket is provided with a connecting hole sleeved on the outer circumference of the square rod at the end corresponding to the square rod, the square rod can rotate in the connecting hole, and the driving mechanism is installed on the base bracket and the driving mechanism is linked to the square rod.

[0011] Using this technical solution, the connecting hole is preferably circular, with an inner diameter larger than the widest cross-sectional dimension of the square rod. This allows for a rotatable connection between the square rod and the base bracket. The base bracket does not interfere with the square rod during rotation. The connecting hole can also be square, polygonal, or other shapes, as long as the hole's size is larger than the widest cross-sectional dimension of the square rod.

[0012] The above-mentioned vehicle windshield assembly can be further configured as follows: main mounting blocks and connecting plates distributed between the two main mounting blocks are symmetrically provided on both sides of the base, and the two ends of the connecting plates are respectively fixedly connected to the corresponding main mounting blocks; a columnar connector distributed below the main mounting blocks is provided below the connecting plates, and the two ends of the columnar connector are respectively fixedly connected to the corresponding main mounting blocks.

[0013] Using this technical solution, the connecting plate and the columnar connector form a "upper and lower double beam" structure, connecting to two sets of main mounting blocks, enhancing the overall rigidity of the base. The connecting plate also provides a rotatable connection to the active swing arm, allowing for the installation of the drive mechanism and square rod.

[0014] The above-mentioned vehicle windshield assembly can be further configured as follows: the driving mechanism includes an outer cover fixed on the main mounting block, a worm gear assembly installed in the outer cover, and a motor whose main body is fixed to the outer cover; the worm gear assembly includes an active worm linked to the output end of the motor, a driven worm hinged at both ends to the outer cover, and an output worm wheel rotatably mounted on the outer cover; the active worm is linked to a driven worm wheel, the driven worm wheel rotates coaxially with the driven worm, the driven worm is linked to the output worm wheel, a second square hole is provided in the middle of the output worm wheel, the second square hole is sleeved on the outer circumference of the square rod and adapted to the square rod.

[0015] Using the above technical solution, the outer cover is fixed to the main mounting block to form a closed cavity, which encloses the worm gear assembly and the motor output end, preventing dust and rainwater from entering the outer cover, and avoiding accelerated wear of the worm gear tooth surface due to friction from foreign objects. At the same time, the inside of the outer cover can be filled with grease to reduce the sliding friction coefficient of the worm gear, thereby improving the transmission efficiency. A second square hole is provided in the middle of the output worm gear to adapt to the square rod. There is no idle stroke during torque transmission, avoiding the phenomenon of idling between the square rod and the output worm gear. In addition, the worm gear assembly is a multi-stage worm gear transmission, which can convert the high speed of the motor into the low speed of the square rod, which is ultimately reflected in the adjustment state of "stable lifting and lowering of the windshield".

[0016] The above-mentioned vehicle windshield assembly can be further configured as follows: the outer cover includes a bottom cover and a surface cover arranged opposite to each other, a mounting cavity for accommodating a worm gear assembly is provided between the bottom cover and the surface cover, a plurality of groups of internal screw holes are provided on the surface cover, and the bottom cover is respectively provided with a group of mounting holes corresponding to each group of internal screw holes, and each group of mounting holes is connected to the internal screw holes by setting fasteners.

[0017] The above technical solution realizes the detachable connection between the bottom cover and the top cover, which facilitates the installation and maintenance of the worm gear assembly. The fasteners can preferably be standard parts such as screws and bolts, which have good interchangeability.

[0018] The above-mentioned vehicle windshield assembly can be further configured as follows: the connecting rod mechanism also includes a driven swing arm distributed below the active swing arm, one end of the driven swing arm is hinged to the base support, and the other end is hinged to the windshield, and the other end of the active swing arm is hinged to a connecting rod, and the end of the connecting rod away from the active swing arm is fixedly connected to the windshield.

[0019] By adopting the above technical solution, a "connecting rod" is linked at the end of the active swing arm, and the end of the connecting rod is fixedly connected to the windshield. The connecting rod lengthens the distance between the active swing arm and the windshield. Compared with the existing technology, during the adjustment process of the windshield, the lifting and lowering trajectory of the windshield is closer to a straight line, so that the position adjustment of the windshield is more effective, and a larger span of adjustment can be achieved to meet the needs of drivers of different heights for the windshield position.

[0020] The above-mentioned vehicle windshield assembly can be further configured as follows: the windshield is fixedly connected to a support frame, the end of the connecting rod away from the active swing arm is integrally formed with the support frame, a hinge seat is provided under the support frame, and the end of the driven swing arm away from the base can be rotatably mounted on the hinge seat.

[0021] By adopting the above technical solution, the support frame replaces the windshield and is respectively hinged to the connecting rod and the driven swing arm, avoiding the need to process too many connection holes on the windshield and improving the structural strength of the windshield. It should be noted that the hinges between the connecting rod and the active swing arm, the hinges between the driven swing arm and the hinge seat, and the hinges between the driven swing arm and the bottom bracket are all tight fit (non-interference fit), that is, each hinge can only rotate when the motor is working. Once the motor stops working, each hinge will not rotate, so that the windshield remains in its current state and will not rise or fall. Among them, the hinge between the active swing arm and the bottom bracket, because the active swing arm is linked to the drive mechanism through the square rod, as long as the drive mechanism is not working, the square rod will remain stationary, and the active swing arm will also remain stationary. The hinge between the fixed active swing arm and the bottom bracket can be a tight fit or a clearance fit.

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 This is an exploded diagram of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of an active swing arm according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the positional relationship between the square rod and the bottom support in an embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of a worm gear assembly according to an embodiment of the present invention.

[0028] Reference numerals: windshield 1, square rod 2; base 3, connecting hole 301, main mounting block 302, connecting plate 303, cylindrical connector 304; active swing arm 4, first square hole 401; driven swing arm 5, support frame 6, connecting rod 7, motor 8, active worm 9, driven worm 10; output worm gear 11, second square hole 1101; driven worm gear 12; bottom cover 13, mounting hole 1301; surface cover 14, inner screw hole 1401. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1 to 5 The vehicle windshield assembly shown includes a windshield 1 and a connecting rod 7 mechanism. The power output of the connecting rod 7 mechanism is linked to the windshield 1, and the power input of the connecting rod 7 mechanism is linked to a square rod 2. The square rod 2 is linked to a driving mechanism that can drive the square rod 2 to rotate.

[0031] The connecting rod 7 mechanism includes a base support 3 mounted on the vehicle body, an active swing arm 4, and a driven swing arm 5 distributed below the active swing arm 4. The windshield 1 is fixedly connected to a support frame 6, and a hinge seat is provided below the support frame 6. One end of the driven swing arm 5 is hinged to the base support 3, and the other end is rotatably mounted on the hinge seat. The other end of the active swing arm 4 is hinged to a connecting rod 7, and the end of the connecting rod 7 away from the active swing arm 4 is integrally formed with the support frame 6. First, the end of the active swing arm 4 is linked to the "connecting rod 7", and the end of the connecting rod 7 is fixedly connected to the windshield 1. The connecting rod 7 lengthens the distance between the active swing arm 4 and the windshield 1. Compared with the existing technology, during the adjustment process of the windshield 1, the lifting and lowering trajectory of the windshield 1 is closer to a straight line, so that the position adjustment of the windshield 1 is more effective, and a larger span of adjustment can be achieved to meet the needs of drivers of different heights for the position of the windshield 1. Secondly, the support frame 6, which replaces the windshield 1, is hinged to the connecting rod 7 and the driven swing arm 5, respectively, avoiding the need for excessive connection holes 301 in the windshield 1 and improving the structural strength of the windshield 1. It should be noted that the hinges between the connecting rod 7 and the active swing arm 4, the driven swing arm 5 and the hinge seat, and the driven swing arm 5 and the base 3 are all tight-fitting (non-interference fit). This means that each hinge can only rotate when the motor 8 is operating. Once the motor 8 stops operating, the hinges will not rotate, causing the windshield 1 to remain in its current state and not rise or fall. The hinge between the active swing arm 4 and the base 3 is linked to the drive mechanism via the square rod 2. As long as the drive mechanism is not working, the square rod 2 will remain stationary, and the active swing arm 4 will also remain stationary. The hinges that secure the active swing arm 4 and the base 3 can be either tight-fitting or loose-fitting.

[0032] The ends of the square rod 2 are rotatably connected to the base bracket 3. The end of the active swing arm 4 is provided with a first square hole 401 that fits over the outer periphery of the square rod 2 and is compatible with the rod 2. The first square hole 401 of the active swing arm 4 forms a "surface-to-surface" fit with the square periphery of the square rod 2. When the drive mechanism rotates the square rod 2, the side of the square rod 2 directly pushes the inner side of the square hole, instantly transmitting torque to the active swing arm 4 with no idle travel. Even if slight gaps develop due to wear after long-term use, the four surfaces of the square rod 2 can still maintain torque transmission through the remaining contact surface, thus resolving the "idle rotation and hysteresis" issues of the prior art. The base bracket 3 is used for final assembly of the automotive windshield and is installed on the vehicle body.

[0033] The end of the base 3 corresponding to the square rod 2 is provided with a connection hole 301 that fits around the outer circumference of the square rod 2. The square rod 2 can rotate within the connection hole 301. The drive mechanism is mounted on the base 3 and linked to the square rod 2. The connection hole 301 is preferably circular, with the inner diameter of the circular connection hole 301 being larger than the widest cross-sectional dimension of the square rod 2. This allows for a rotatable connection between the square rod 2 and the base 3. The base 3 does not interfere with the square rod 2 during rotation. The connection hole 301 can also be formed into a square, polygonal, or other shape, as long as the connection hole 301 is larger than the widest cross-sectional dimension of the square rod 2.

[0034] The base bracket 3 is symmetrically provided with main mounting blocks 302 and a connecting plate 303 disposed between the two main mounting blocks 302. The two ends of the connecting plate 303 are fixedly connected to the corresponding main mounting blocks 302. Below the connecting plate 303, a columnar connector 304 is disposed below the main mounting blocks 302. The two ends of the columnar connector 304 are fixedly connected to the corresponding main mounting blocks 302. The connecting plate 303 and the columnar connector 304 form a "upper and lower double beam" structure, connecting the two sets of main mounting blocks 302 to enhance the overall rigidity of the base bracket 3. The connecting plate 303 is also used for rotatable connection with the active swing arm 4, for mounting the drive mechanism and the square rod 2.

[0035] The drive mechanism includes a housing fixed to the main mounting block 302, a worm gear assembly mounted within the housing, and a motor 8 whose main body is fixed to the housing. The worm gear assembly includes a driving worm 9 linked to the output end of the motor 8, a driven worm 10 hinged at both ends to the housing, and an output worm wheel 11 rotatably mounted to the housing. The driving worm 9 is linked to a driven worm wheel 12, which rotates coaxially with the driven worm 10 and is linked to the output worm wheel 11. The output worm wheel 11 has a second square hole 1101 defined in its center. The second square hole 1101 is sleeved around the outer periphery of the square rod 2 and is adapted to fit the square rod 2. The housing is fixed to the main mounting block 302, forming a closed cavity that encloses the worm gear assembly and the output end of the motor 8, preventing dust and rain from entering the housing and preventing accelerated wear of the worm gear teeth due to friction from foreign matter. Furthermore, the interior of the housing can be filled with grease to reduce the sliding friction coefficient of the worm gear, thereby improving transmission efficiency. A second square hole 1101 is provided in the middle of the output worm gear 11, which fits the square rod 2. This eliminates idle travel during torque transmission, preventing idling between the square rod 2 and the output worm gear 11. Furthermore, the worm gear assembly utilizes a multi-stage worm drive, converting the high speed of the motor 8 to the low speed of the square rod 2, ultimately achieving a stable windshield 1 elevation adjustment state.

[0036] The outer cover includes a bottom cover 13 and a top cover 14 arranged opposite each other. A mounting cavity for accommodating a worm gear assembly is defined between the bottom cover 13 and the top cover 14. The top cover 14 is provided with a plurality of groups of internal screw holes 1401. The bottom cover 13 is provided with a group of mounting holes 1301 corresponding to each group of internal screw holes 1401. Each group of mounting holes 1301 is connected to the internal screw holes 1401 by fasteners, thereby achieving a detachable connection between the bottom cover 13 and the top cover 14, facilitating installation and maintenance of the worm gear assembly. The fasteners are preferably standard parts such as screws and bolts, which have good interchangeability.

[0037] The automotive windshield assembly provided in this embodiment not only meets the requirements for adjusting the position of the windshield 1 , but also utilizes a square rod 2 as the transmission element between the worm gear assembly and the active swing arm 4 . The square shape of the square rod 2 ensures more stable and efficient force transmission, eliminating the issues of idle motion, hysteresis, and wear associated with the existing spline connection. Furthermore, the higher torsional rigidity of the square rod 2 ensures synchronization between the active swing arms 4 on both sides, preventing the windshield 1 from being misaligned or tilted. Furthermore, the addition of a connecting rod 7 makes the adjustment path of the windshield 1 more linear, extending the adjustment range.

[0038] The adjustment method of the vehicle windshield assembly is as follows:

[0039] After motor 8 is started, its output drives the active worm 9 to rotate; the active worm 9 meshes with the driven worm gear 12, driving the driven worm gear 12 to rotate; because the driven worm gear 12 is coaxially fixed with the driven worm 10, the driven worm 10 rotates synchronously; the driven worm 10 further drives the output worm gear 11 to rotate. The second square hole 1101 in the center of the output worm gear 11 contacts and fits with the square outer surface of the square rod 2. The rotation of the output worm gear 11 directly drives the synchronous rotation of the square rod 2. The two ends of the square rod 2 are rotatably connected through the connecting hole 301 of the base 3 (the inner diameter of the connecting hole 301 is larger than the widest dimension of the cross-section of the square rod 2 to avoid interference), ensuring the stable rotation of the square rod 2. The first square hole 401 at the end of the active swing arm 4 is sleeved on the outer periphery of the square rod 2, contacting and fitting with the square structural surface of the square rod 2. When the square rod 2 rotates, its side surface directly pushes on the inner surface of the first square hole 401, seamlessly transmitting torque to the active swing arm 4, driving the active swing arm 4 to rotate about the hinge point of the base support 3. When the active swing arm 4 rotates, the connecting rod 7 hinged at its other end follows; the connecting rod 7 is integrally formed with the support frame 6 of the windshield 1, thereby driving the support frame 6 and the windshield 1 to move. At the same time, one end of the driven swing arm 5 is hinged to the base support 3, and the other end is connected to the windshield 1 through the hinge seat of the support frame 6. The driven swing arm 5 follows and constrains the movement trajectory of the windshield 1. Because the connecting rod 7 increases the distance between the active swing arm 4 and the windshield 1, the lifting and lowering trajectory of the windshield 1 is closer to a straight line, and the adjustment span is increased.

[0040] When the motor 8 stops working, the hinges between the connecting rod 7 and the active swing arm 4, the hinges between the driven swing arm 5 and the hinge seat, and the hinges between the driven swing arm 5 and the base 3 are all in a tight fit relationship (non-interference fit), and each hinge is locked, so that the windshield 1 maintains its current position.

Claims

1. A vehicle windshield assembly, comprising a windshield and a connecting rod mechanism, wherein the power output of the connecting rod mechanism is linked to the windshield, and characterized in that: The power input of the connecting rod mechanism is linked with a square rod, and the square rod is linked with a driving mechanism that can drive the square rod to rotate. The connecting rod mechanism includes an active swing arm and a bottom bracket installed on the vehicle body. The two ends of the square rod are rotatably connected to the bottom bracket. The end of the active swing arm is provided with a first square hole that is sleeved on the outer periphery of the square rod and adapted to the square rod. The bottom bracket is provided with a connecting hole that is sleeved on the outer periphery of the square rod corresponding to the end of the square rod. The square rod can rotate in the connecting hole. The driving mechanism is installed on the bottom bracket and the driving mechanism is linked with the square rod. The structure includes an outer cover fixed on the main mounting block, a worm gear assembly installed in the outer cover, and a motor whose main body is fixed to the outer cover. The worm gear assembly includes an active worm gear linked to the output end of the motor, a driven worm gear with both ends hinged to the outer cover, and an output worm wheel rotatably mounted on the outer cover. The active worm gear is linked to a driven worm gear, and the driven worm gear rotates coaxially with the driven worm gear. The driven worm gear is linked to the output worm gear, and a second square hole is provided in the middle of the output worm gear. The second square hole is sleeved on the outer periphery of the square rod and adapted to the square rod.

2. The vehicle windshield assembly according to claim 1, characterized in that: The base is symmetrically provided with main mounting blocks and connecting plates distributed between the two main mounting blocks on both sides, and the two ends of the connecting plates are fixedly connected to the corresponding main mounting blocks respectively. A columnar connector is provided below the connecting plates and distributed below the main mounting blocks, and the two ends of the columnar connector are fixedly connected to the corresponding main mounting blocks respectively.

3. The vehicle windshield assembly according to claim 1, characterized in that: The outer cover includes a bottom cover and a surface cover arranged opposite to each other, and a mounting cavity for accommodating a worm gear assembly is provided between the bottom cover and the surface cover. The surface cover is provided with several groups of internal screw holes, and the bottom cover is provided with a group of mounting holes corresponding to each group of internal screw holes, and each group of mounting holes is connected to the internal screw holes by setting fasteners.

4. The vehicle windshield assembly according to any one of claims 1 to 3, characterized in that: The connecting rod mechanism also includes a driven swing arm distributed below the active swing arm, one end of the driven swing arm is hinged to the base support, and the other end is hinged to the windshield, the other end of the active swing arm is hinged to a connecting rod, and the end of the connecting rod away from the active swing arm is fixedly connected to the windshield.

5. The vehicle windshield assembly according to claim 4, characterized in that: The windshield is fixedly connected to a support frame, the end of the connecting rod away from the active swing arm is integrally formed with the support frame, a hinge seat is provided below the support frame, and the end of the driven swing arm away from the bottom support can be rotatably mounted on the hinge seat.

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