Pressure sensing automatic parking device

Abstract

The invention relates to the safety technology of electro-tricycles, in particular to a pressure sensing automatic parking device. Whether a driver leaves a seat or not is detected through the pressure sensor, the hand brake is automatically tensioned, and the car sliding accident is prevented. The device comprises a pressure sensor, a main controller, a speed reduction motor set, a worm gear lead screw set, a swing arm and a hand brake handle. The pressure sensor sends a signal to the main controller when the driver leaves the seat, the main controller instructs the speed reduction motor set to start, the worm gear lead screw set and the swing arm are driven, and the operation of automatically tensioning the hand brake is completed. The device is standby when a driver sits down and is automatically started after the driver leaves the seat, it is ensured that a hand brake is fastened during parking, and the safety of a vehicle is improved. The electric tricycle is simple in structure, convenient to install, low in cost and suitable for electric tricycles, especially low-end markets. The electric tricycle can effectively prevent the sliding accident caused by the fact that a driver forgets to pull a handle brake, meets the requirement of the market for the safety of the electric tricycle, and has high cost performance and wide application prospects.

Description

Technical Field

[0001] A pressure-sensing automatic parking device. The embodiments of the present invention relate to the technical field of electric tricycle safety, and particularly to an automatic handbrake tightening device. Background Art

[0002] In modern society, electric tricycles have become an extremely common and widely used means of transportation and personal mobility. They play a crucial role in the overall development of society and people's daily lives. However, when an electric tricycle is not in use, if the handbrake is not tightened, it often causes the vehicle to slide and roll, which can easily lead to various traffic accidents. Currently, many electric tricycles on the market generally do not have the function of automatically pulling the handbrake, which frequently results in the situation where the driver forgets to pull the handbrake. The resulting rollover accidents not only pose a serious threat to people's lives and property safety but also run counter to the increasing social safety requirements and vehicle safety usage regulations. In view of this, it is of great practical significance and value to develop and design a safety device that can effectively prevent rollover accidents caused by forgetting to pull the handbrake. It can not only significantly improve the safety of using electric tricycles but also bring more reliable guarantees and positive impacts to the entire social traffic environment. Summary of the Invention

[0003] Therefore, the embodiments of the present invention provide a pressure-sensing automatic parking device to solve the problem of easy occurrence of accidents in the prior art due to the lack of an automatic handbrake function in electric tricycles.

[0004] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0005] A pressure-sensing automatic parking device includes a pressure sensor, a main controller, a reduction motor set, a worm and screw set, a swing arm, and a handbrake handle, wherein:

[0006] The pressure sensor is used to collect the pressure change signal indicating whether the driver has left the seat and is connected to the main controller as a signal switch of the automatic handbrake tightening device. When the pressure sensor is under pressure, the controller instruction is in the off state, and at this time, the automatic handbrake tightening device is in the standby state. When the pressure sensor changes from the pressurized state to the non-pressurized state, a set of signals with the switch turned on is generated, and the on-signal is transmitted to the main controller. At this time, the main controller sends an activation signal to the reduction motor. In the actual layout, the distance range maintained between the edge end of the pressure sensor and the edge of the seat cushion is accurately set to 1 cm - 10 cm. The determination of this distance range is based on in-depth research and analysis of the body coverage range and pressure distribution when the driver is sitting on the seat cushion conventionally. Through such a setting, it can be ensured that the pressure sensor accurately and sensitively senses the pressure change when the driver sits on or leaves the seat cushion, thereby providing a reliable and timely trigger signal for the entire automatic parking device, effectively guaranteeing the safety and stability of the electric tricycle in the parking operation, and avoiding the occurrence of vehicle rolling accidents caused by the driver forgetting to pull the handbrake.;

[0007] One end of the main controller is connected to the pressure sensor to receive the switch signal, one end is electrically connected to the reduction motor to transmit the switch signal, and the other end is connected to the vehicle power supply. According to the pressure signal of the pressure sensor transmitted to the main controller, the main controller sends a forward and reverse signal to the reduction motor once after receiving the signal;

[0008] The main controller includes a controller and a delay-disconnect relay connected to the controller. The delay-disconnect relay is electrically connected to the reduction motor, and the delay time of the delay-disconnect relay is set to the time of one cycle from the start position of the stroke of the worm screw nut seat to the end position of the maximum stroke;

[0009] The reduction motor group includes a reduction motor and a gear. The gear of the reduction motor group meshes with the gear of the worm screw. After receiving the signal sent by the main controller, the reduction motor rotates the gear to drive the worm screw gear to work.

[0010] The worm screw group includes a worm screw, a gear, and a nut seat. The nut seat is provided with a T-shaped buckle, and the T-shaped buckle is adaptively connected to the swing arm slot. The swing arm is fixed to the handbrake handle rotating shaft as a lever fulcrum. The worm screw nut seat drives the swing arm to perform reciprocating motion, and the arc opening of the swing arm will push the handbrake handle pin to drive the handbrake handle to rotate during operation.

[0011] When the reduction motor drives the gear to rotate, the worm screw rotates to drive the nut seat to move forward and backward. The nut seat drives the swing arm to move towards both ends of the worm screw. The swing arm pushes the handbrake handle to rotate to achieve braking. When the screw nut seat reaches the maximum stroke from the starting end to the ending end, the handbrake handle is pushed to the topmost position and the handbrake braking is completed. After the nut seat reaches the stroke at the end of the screw, the timing of the delay relay ends. At this time, the reduction motor rotates in the reverse direction to drive the worm screw nut seat to reset and drive the swing arm to reset. The main controller is electrically connected to the vehicle power supply and is used to supply power to the pressure sensor, the main controller and the reduction motor of the automatic handbrake tightening device. Turning off the power supply can turn off the automatic parking device and restore the function of manually pulling the handbrake.

[0012] Preferably, the pressure sensor is a strain gauge type pressure sensor, and the strain gauge type pressure sensor is arranged at the driver's seat position.

[0013] Preferably, the design between the end of one end of the long slot hole of the swing arm and the lever fulcrum of the middle through hole shaft is non-linear.

[0014] Furthermore, the handbrake handle is connected to the swing arm and the brake wire.

[0015] The embodiments of the present invention have the following advantages:

[0016] When the driver sits on the driver's seat, the pressure sensor collects the pressure change signal. At this time, the main controller receives the first signal and issues a voice prompt to put down the handbrake handle; after the driver leaves the seat, the pressure sensor collects the pressure change signal. At this time, the main controller receives the second signal and sends a forward and reverse movement operation instruction to the reduction motor through the delay timer according to the second signal. The reduction motor rotates forward to drive the worm screw to rotate forward. The forward rotation of the worm screw drives the screw nut seat to move from the starting end to the ending end. After the screw nut seat reaches the ending end, the timing of the delay timer ends and it commands the reduction motor to rotate in the reverse direction and drive the worm screw and the screw nut seat to move. Finally, the screw nut seat resets to the starting position, thereby driving the swing arm to perform a lever movement and reset, and pushing the handbrake handle to stop after reaching the maximum stroke. At this time, the handbrake handle reaches the maximum locking stroke, thereby pulling the brake cable to achieve the automatic handbrake operation. The whole process only needs to put down the handbrake handle according to the voice prompt before starting the vehicle, and the operation is simple. The automatic handbrake function can be realized only by installing a pressure sensor, a main controller, a reduction motor group, a swing arm and a handbrake handle, so as to improve parking safety, with low installation cost, convenient operation, and no need to make major changes to the electric tricycle, without changing the original vehicle structure, and will not affect the driving safety of the electric tricycle, meeting the relevant regulations. Description of the Drawings

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0019] Figure 1 - This figure is a schematic diagram of the connection structure of each component of the electric tricycle pressure-sensing automatic parking device provided by the embodiment of the present invention. It shows the connection relationship between the pressure sensor, the main controller, the reduction motor group, the worm and screw group, the swing arm and the handbrake handle, and how to achieve the automatic parking function through these components.

[0020] Figure 2 - This figure is a schematic diagram of the structural features of each component in the embodiment of the present invention. The figure shows the appearance and structural features of the pressure sensor, the main controller, the reduction motor group, etc., and clearly marks the positions of the functions of each component.

[0021] Figure 3 - This figure is a schematic diagram of the meshing and linkage structure of the reduction motor group and the worm and screw group. This figure illustrates how the reduction motor group and the worm and screw group transmit power through gear meshing to drive the handbrake handle to achieve braking.

[0022] Figure 4-1 It is the top view of the schematic diagram of the whole worm and screw mechanism; Figure 4-2 It is the exploded view of the schematic diagram of the whole worm and screw mechanism; It shows the worm and screw, gears, nut seats and their related structural components, and focuses on how each component works together to drive the swing arm and the handbrake handle; Figure 4-3 They are the front view, side view and top view of the nut seat.

[0023] Figure 5 - This figure is the structure diagram of the swing arm. The figure details the shape, length, shape of the swing arm and how it is linked with the worm and screw group to push the handbrake handle to achieve braking.

[0024] Figure 6- This figure is the structural diagram of the handbrake handle, showing the design of the handbrake handle and how to complete the tightening of the handbrake through the movement of the swing arm to ensure safe parking.

[0025] In the figure: 1. Pressure sensor; 2. Main controller; 3. Reduction motor assembly; 4. Reduction motor assembly; 5. Swing arm; 6. Handbrake handle; 7. Protection box; 8. Brake wiring. Specific implementation mode

[0026] Embodiment 1

[0027] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0028] A pressure-sensing automatic parking device, combined with Figure 1 、 Figure 2 、 Figure 3 、Figure 4 Figure 5 and Figure 6 , includes: pressure sensor 1, main controller 2, reduction motor assembly 3, electric push rod assembly 4, swing arm 5 and handbrake handle 6.

[0029] The pressure sensor 1 is used to sense and collect whether the driver sits or leaves the driver's seat, thereby setting that the driver sitting in the driver's seat is ready to start the vehicle, and prompting the driver to lower the handbrake handle, thereby setting that the driver leaving the driver's seat is for parking, and prompting the driver that the pressure automatic parking device has been started and the handbrake parking has been completed. Its sensing method can be set to collect whether there is pressure at the driver's seat position to start the pressure automatic parking device. The pressure sensor (1) establishes a signal connection with the main controller (2) to collect pressure signals and transmit them to the main controller (2). After receiving the signal, the main controller (2) gives a voice prompt.

[0030] The main controller (2) is electrically connected to the vehicle power supply to provide electrical energy for the pressure sensor (1), the main controller (2) and the reduction motor (3); the main controller (2) is electrically connected to the reduction motor group (3) to control the operation of the reduction motor group (3) according to the signal of the pressure sensor (1). The reduction motor group (3) has a gear (32), and this gear (32) meshes with the gear (42) of the worm and screw group (4), thereby realizing power transmission and enabling the reduction motor group (3) to drive the worm and screw group (4) to operate.

[0031] The worm gear screw rod group (4) is connected to the swing arm (5) and is used for the swing arm (5) to perform lever movement, thereby driving the handbrake handle (6) to rotate to achieve braking. When the swing arm (5) pushes the handbrake handle (6) to the highest position of the ratchet tooth, the pawl is in a pawl-clamping state. After the handbrake is braked, the swing arm (5) drives the worm gear screw rod to rotate in the reverse direction through the reverse movement of the reduction motor (3) and drives the screw nut seat to move to the starting position, and finally drives the swing arm (5) to reset; at this time, the pressure-sensing automatic parking device is in a standby state. When the driver drives the electric tricycle again, the driver manually releases the handbrake according to the voice prompt, which is convenient to use.

[0032] When there is a working condition where the pressure-sensing automatic parking device does not need to work, such as when the driver gets out of the vehicle to push the vehicle, only need to turn off the power switch of the pressure-sensing automatic parking device to restore manual operation, and the operation is simple.

[0033] A pressure-sensing automatic parking device provided by an embodiment of the present invention can effectively improve the parking safety of an electric tricycle, is convenient to install and has a low cost, and is applicable to the safety improvement of all electric tricycles.

[0034] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A pressure-sensing automatic parking device for an electric tricycle, characterized in that: It comprises a pressure sensor (1), a main controller (2), a reduction motor group (3), a worm gear screw group (4) and a swing arm (5); - the pressure sensor (1) establishes a signal connection with the main controller (2) for collecting pressure signals and transmitting them to the main controller (2); - the main controller (2) is electrically connected to the reduction motor group (3), and the main controller (2) is connected to the vehicle power supply to control the operation of the reduction motor group (3) according to the signal of the pressure sensor (1); - the reduction motor group (3) has a gear (32), and the gear (32) and the gear (42) of the worm gear screw group (4) are meshed with each other, thereby realizing power transmission, so that the reduction motor group (3) can drive the worm gear screw group (4) to operate; - the worm gear screw assembly (4) comprises a gear (42) and a screw nut seat (46), the screw nut seat (46) being provided with a T-shaped buckle (461), the T-shaped buckle (461) being adapted to and connected to the slotted hole (51) of the swing arm (5), and the swing arm (5) is driven to move by the operation of the worm gear screw assembly (4); The swing arm (5) is provided with a slotted hole (51), a through hole (52) and an arc-shaped opening (53); the swing arm (5) is connected and fixed to the handbrake handle through hole (61) of the handbrake handle (6) via a rotating shaft (55) passing through the through hole (52), thereby realizing linkage between the swing arm (5) and the handbrake handle (6).

2. According to a pressure-sensing automatic parking device defined in claim 1, the main controller (2) is provided with a speaker (21), characterized in that: When the pressure sensor (1) collects a pressure signal, the main controller (2) instructs the loudspeaker (21) to start a voice broadcast prompt, wherein the decibel range of the voice broadcast prompt is 50dB-110dB.

3. A pressure-sensing automatic parking device according to claim 1, wherein the pressure sensor (1) is arranged at the driver's seat, characterized in that: The pressure sensor (1) is used to collect pressure signals, and the sensor is laid flat on the edge areas of the seat cushion in the front, back, left and right directions. In this layout, the distance between the edge end of the pressure sensor and the edge of the seat cushion is limited to 1 cm - 20 cm.

4. According to the pressure-sensing automatic parking device of claim 1, the swing arm (5) is provided with a slot (51), a through hole (52) and an arc-shaped opening (53). Characterized in that: The maximum straight-line distance range of the length within the boundary range of the slot hole (51) is defined as 3 cm - 20 cm, the maximum straight-line distance range of the width within the boundary range of the slot hole (51) is defined as 0.5 cm - 5 cm, and the straight-line distance range between the two ends of the weapon edge of the arc-shaped opening (53) is determined as 1 cm - 10 cm.

5. According to the pressure-sensing automatic parking device of claim 1, the through hole (52) of the swing arm (5) is connected to the through hole (61) of the handbrake handle via a rotating shaft (55), characterized in that: The length of the rotating shaft (55) is limited to between 1 cm and 5 cm.

6. A pressure-sensing automatic parking device according to claim 1, wherein the handbrake handle (6) is provided with a through hole (62), and the through hole (62) is provided with a latch (66), characterized in that: The latch (66) is cylindrical, with a length ranging from 1 cm to 10 cm and a diameter ranging from 0.5 to 2 cm.

7. The pressure-sensing automatic parking device according to claim 1, wherein the worm screw (4) is provided with a screw nut seat (46), characterized in that: The screw nut seat (46) is provided with a T-shaped buckle (461), the cross-sectional length of the T-shaped buckle (461) is in the range of 2 cm to 10 cm, and the cross-sectional width of the T-shaped buckle (461) is in the range of 0.5 cm to 5 cm.

8. The pressure-sensing automatic parking device according to claim 1, wherein the reduction motor group (3) is provided with a gear (32), and the worm screw (4) is provided with a gear (41), characterized in that: The gear (32) of the reduction motor assembly (3) and the gear (41) of the worm gear screw assembly (4) are meshed and connected with each other.

9. The pressure-sensing automatic parking device according to claim 1, characterized in that: The pressure sensor (1) collects the pressure signal and transmits it to the main controller (2). After receiving the signal, the main controller (2) sends a set of forward and reverse signal instructions to the reduction motor group (3), instructing the reduction motor group to perform a forward and reverse operation, thereby driving the worm screw to perform a forward and reverse operation. The forward and reverse operation of the worm screw group (4) drives the screw nut seat (46) to perform a reciprocating motion from the worm screw end (45) to the worm screw end (44). The screw nut seat (46) drives the swing arm (5) to move from the starting end (45) of the worm screw to the end (44). Then, the screw nut seat (46) drives the swing arm (5) to move from the starting end (44) of the worm screw to the end (45). The screw nut seat (46) drives the swing arm (5) to perform a reciprocating motion.

10. The pressure-sensing automatic parking device according to claim 1, wherein the worm screw assembly (3) is provided with a reinforcing stabilizing rod (431) and a reinforcing stabilizing rod (432), characterized in that: The reinforcing stabilizing rod (431) and the reinforcing stabilizing rod (432) respectively penetrate and connect the fixing bracket (44) and the fixing bracket (45), and the reinforcing stabilizing rod (431) and the reinforcing stabilizing rod (432) respectively penetrate through holes (464) and (465) connected to the screw rod nut seat.

11. A pressure-sensing automatic parking device according to claim 1, wherein the screw nut seat (46) is provided with a T-shaped buckle (462), the swing arm (5) is provided with a slot (51), and the screw nut seat (46) is connected to the slot (51) of the swing arm (5) through the T-shaped buckle (462), and other characteristics are: the shortest straight-line distance of the length within the boundary range of the slot hole (51) is greater than the longest straight-line distance of the cross-sectional length of the T-shaped buckle (461), and the shortest straight-line distance of the width within the boundary range of the slot hole (51) is greater than the longest straight-line distance of the cross-sectional width of the T-shaped buckle (461).

Images