Rear axle suspension structure of tricycle

Abstract

The utility model discloses a rear axle suspension structure of a tricycle, and belongs to the technical field of rear axle structures of tricycles. The technical problems of assembly and maintenance efficiency and use convenience are solved. According to the technical scheme, two sets of brake assemblies are arranged on two bent rods of a frame, a mounting frame is arranged on the bent rods, a clamping piece is fixed to the mounting frame, and a lubricating sleeve is arranged between the clamping piece and the mounting frame; the brake assembly comprises a brake shaft, brakes, brake pull rods and a brake tractor, the brake shaft is arranged on the lubricating sleeve in a penetrating mode, the two ends of the brake shaft are connected with the brakes located on the wheels through the brake pull rods respectively, and the middle of the brake shaft is connected with the brake tractor; the brake tractor has the advantages of being convenient to assemble, easy to overhaul and flexible and reliable in action.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tricycles, in particular to a rear axle suspension structure of a tricycle. BACKGROUND

[0002] At present, electric tricycles are very common on the market. In the prior art, a rear axle semi-suspension arm system of an electric tricycle is disclosed in the authorized announcement CN213008589U, which comprises a frame, a wheel body and an arm. The wheel bodies are arranged in pairs on both sides of the tail of the frame and are connected with driving devices through corresponding transmission components. An elastic member is arranged on the transmission component. One end of the elastic member away from the wheel body is connected with the frame. One end of the arm is hinged to the frame, and the other end is constrained with the transmission component on the corresponding side and swings synchronously with the position change of the wheel body.

[0003] The above structure occupies a large position, and assembly and maintenance are difficult, which causes low work efficiency of assembly and maintenance personnel.

[0004] The above-mentioned technology at least has the following problems: how to improve the maintenance and assembly efficiency of the rear axle suspension structure. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems and shortcomings: how to improve the maintenance and assembly efficiency, the present application provides a rear axle suspension structure of a tricycle.

[0006] To achieve the above object and other related objects, the present application adopts the following technical scheme:

[0007] A rear axle suspension structure of a tricycle comprises a frame, a suspension arm, a rear wheel driving assembly and a shock absorber. The rear wheel driving assembly is installed on both sides of the frame through the suspension arm. The rear wheel driving assembly and the frame are connected through two symmetrically arranged shock absorbers. Two brake assemblies are arranged on two bent rods of the frame. A mounting bracket is arranged on the bent rod. A clamping piece is fixed to the mounting bracket. A lubricating sleeve is arranged between the clamping piece and the mounting bracket.

[0008] The brake assembly comprises a brake shaft, a brake, a brake pull rod and a brake tractor. The brake shaft is arranged in the lubricating sleeve. The two ends of the brake shaft are connected with the brake on the wheel through the brake pull rod. The brake tractor is connected to the middle of the brake shaft.

[0009] The brake tractor is clamped at the position of the cross beam of the frame.

[0010] Preferably, the cross beam is provided with a clamping seat, the brake traction device comprises a fastening sleeve, a spring, a traction rope and a traction arm, one end of the traction arm is fixed on the brake shaft, the other end of the traction arm is fixed on the traction rope, the spring is further sleeved on the traction rope, the spring abuts against the fastening sleeve, the fastening sleeve is sleeved on the traction rope and fixed on the clamping seat, and the clamping seat is provided with a notch.

[0011] Preferably, the traction arm is fixed with a magnet, and the mounting frame is fixed with a Hall sensor for sensing the active stroke position of the magnet, when the traction arm carries the magnet to move to the limit position, the Hall sensor senses the magnet and triggers an electric signal.

[0012] Preferably, the rear wheel drive assembly is provided with a speed sensor, and the Hall sensor and the speed sensor are connected with a protection circuit, the protection circuit comprises a comparator, a reference circuit, an AND gate circuit and a switching circuit, the Hall sensor is connected with a first input end of the AND gate circuit, the reference circuit is connected with an inverting input end of the comparator, the speed sensor is connected with a non-inverting input end of the comparator, an output end of the comparator is connected with a second input end of the AND gate circuit, and an output end of the AND gate circuit is connected with the switching circuit, and the switching circuit is used for making power-off action on power supply of the tricycle.

[0013] Preferably, the reference circuit comprises a first voltage source, a resistor R2 and a potentiometer Rp1, one end of the resistor R2 is connected with the first voltage source, the other end of the resistor R2 is connected with the potentiometer Rp1, the resistance end of the potentiometer Rp1 is grounded, and the adjusting end of the potentiometer Rp1 is connected with the inverting input end of the comparator for inputting a threshold setting signal.

[0014] Preferably, the switching circuit comprises a resistor R3, a resistor R4, a transistor Q1 and a relay, one end of the resistor R3 is connected with the output end of the AND gate circuit, the other end of the resistor R3 is connected with one end of the resistor R4 and the base of the transistor Q1, the other end of the resistor R4 and the emitter of the transistor Q1 are grounded, one end of the coil of the relay is connected with a second voltage source, the other end of the coil of the relay is connected with the collector of the transistor Q1, and the switching part of the relay is connected in the power supply circuit of the tricycle.

[0015] In summary, the present application has at least one of the following beneficial technical effects:

[0016] 1. Two groups of brake assemblies can brake the wheels on the rear wheel drive assembly, the fork truck assembly needs to be disassembled during maintenance and repair, the assembly process is fixed by the clamping piece, so the disassembly is relatively easy, on the fork truck assembly, the lubricating sleeve can reduce resistance and improve brake action flexibility, the fork truck assembly is installed on the bent rod, the position of the bent rod is relatively reliable and not easy to be impacted, the support strength is high, the disassembly process needs to be disassembled from the top, without the need for people to lie on the ground for maintenance, which is very convenient and labor-saving.

[0017] 2. During the operation of the braking assembly, a Hall sensor detects the position and the signal is processed by the protection circuit. It can also be combined with the vehicle speed sensor to determine the vehicle speed. The protection circuit can cut off the power when the vehicle speed reaches the upper limit threshold and the braking action is at the extreme position, thereby improving safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a partial top view of an embodiment of the present invention;

[0020] Figure 3 yes Figure 1 Enlarged view of part A;

[0021] Figure 4 This is the circuit schematic diagram of this embodiment.

[0022] Explanation of reference numerals for major components:

[0023] 1. Frame; 11. Bend; 12. Crossbeam; 13. Mounting bracket; 14. Clamp; 15. Lubrication sleeve; 16. Brake seat; 17. Notch; 2. Suspension arm; 3. Rear-wheel drive assembly; 4. Shock absorber; 5. Brake assembly; 51. Brake shaft; 52. Brake; 53. Brake lever; 54. Brake traction device; 541. Fastening sleeve; 542. Spring; 543. Tow rope; 544. Tow arm; 6. Magnet; 7. Hall sensor; 8. Vehicle speed sensor; 9. Protection circuit; 91. Comparator; 92. Reference circuit; 93. AND gate circuit; 94. Switching circuit. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this invention. Those skilled in the art can easily understand other advantages and effects of this invention from the content disclosed in this specification. This invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be changed at will, and the layout of the components may also be more complex.

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Example

[0027] This invention discloses a rear axle suspension structure for a tricycle, with reference to... Figure 1 As shown, the vehicle includes a frame 1, suspension arms 2, a rear-wheel drive assembly 3, and shock absorbers 4. The rear-wheel drive assembly 3 is mounted on both sides of the frame 1 via the suspension arms 2. The rear-wheel drive assembly 3 and the frame 1 are connected by two symmetrically arranged shock absorbers 4. The shock absorbers 4 are used to dampen the vibration of the frame 1 and prevent the vibration of the wheels from being transmitted to the frame 1 during driving.

[0028] Two sets of brake assemblies 5 are installed on the two curved rods 11 of the frame 1, which can significantly improve braking efficiency. A mounting bracket 13 is installed on the curved rod 11, and a clamping plate 14 is fixed to the mounting bracket 13. A lubricating sleeve 15 is placed between the clamping plate 14 and the mounting bracket 13. This assembly method allows for direct assembly and disassembly from above, eliminating the need for personnel to lie on the ground for inspection, greatly improving the convenience of maintenance. The clamping plate 14 is fixed to the mounting bracket 13 with screws, which simultaneously fixes the lubricating sleeve 15. The inner side of the lubricating sleeve 15 and the brake shaft 51 slide circumferentially. The lubricating sleeve 15 is a component containing lubricating oil, thus reducing the rotational friction of the brake shaft 51 and ensuring smooth, unobstructed movement.

[0029] Combination Figure 2 and Figure 3 It is understood that the brake assembly 5 includes a brake shaft 51, a brake 52, a brake lever 53, and a brake actuator 54. The brake 52 is a prior art product and is not an improvement of this application. The brake shaft 51 passes through the lubrication sleeve 15, and both ends of the brake shaft 51 are connected to the brake 52 located on the wheel via the brake lever 53. The brake actuator 54 is connected to the middle of the brake shaft 51.

[0030] The brake puller 54 is snapped onto the crossbeam 12 of the frame 1. This snap-fit ​​assembly makes disassembly and assembly very easy. Specifically, a mounting bracket 16 is provided on the crossbeam 12. The brake puller 54 includes a fastening sleeve 541, a spring 542, a traction rope 543, and a traction arm 544. One end of the traction arm 544 is fixed to the brake shaft 51, and the other end of the traction arm 544 is fixed to the traction rope 543. The spring 542 is also sleeved on the traction rope 543. The spring 542 abuts against the fastening sleeve 541. The fastening sleeve 541 is fitted onto the traction rope 543 and fixed to the mounting bracket 16. A notch 17 is provided on the mounting bracket 16.

[0031] During maintenance, the installation structure is easily visible, allowing for direct disassembly and assembly from above. The disassembly and assembly points are not easily obstructed and are unobstructed, making disassembly and assembly very easy.

[0032] In another aspect, in combination Figure 3 and Figure 4 It is understood that the magnet 6 is fixed on the traction arm 544, and the Hall sensor 7 for sensing the active stroke position of the magnet 6 is fixed on the mounting frame 13. When the traction arm 544 carries the magnet 6 to move to the limit position, the Hall sensor 7 senses the magnet 6 and triggers an electrical signal. During the braking action, the traction arm 544 will rotate, so that its position can be detected. The speed sensor 8 is arranged on the wheel of the rear wheel drive assembly 3. The Hall sensor 7 and the speed sensor 8 are connected with the protection circuit 9.

[0033] Figure 4 The protection circuit 9 includes a comparator 91, a reference circuit 92, an AND gate circuit 93, and a switching circuit 94. The Hall sensor 7 is connected to the first input end of the AND gate circuit 93. The reference circuit 92 is connected to the inverting input end of the comparator 91. The speed sensor 8 is connected to the non-inverting input end of the comparator 91. The output end of the comparator 91 is connected to the second input end of the AND gate circuit 93. The output end of the AND gate circuit 93 is connected to the switching circuit 94. The switching circuit 94 is used to make the power-off action for the tricycle.

[0034] The reference circuit 92 includes a first voltage source, a resistor R2, and a potentiometer Rpl. One end of the resistor R2 is connected to the first voltage source. The other end of the resistor R2 is connected to the potentiometer Rpl. The resistance end of the potentiometer Rpl is grounded. The adjustment end of the potentiometer Rpl is connected to the inverting input end of the comparator 91 for inputting the threshold setting signal. The first voltage source Vcc can be a 5V voltage. The voltage value output by the reference circuit 92 can be adjusted by adjusting the position of the potentiometer Rpl to set a reference signal Vref1 value, thereby representing the upper threshold value of the speed. The speed sensor 8 detects the wheel speed feedback signal, which is judged by the comparator 91. When the speed exceeds the set threshold value, the comparator 91 outputs a high level. Otherwise, the comparator 91 outputs a low level signal.

[0035] The switching circuit 94 includes a resistor R3, a resistor R4, a transistor Q1, and a relay. One end of the resistor R3 is connected to the output end of the AND gate circuit 93. The other end of the resistor R3 is connected to one end of the resistor R4 and the base of the transistor Q1. The other end of the resistor R4 and the emitter of the transistor Q1 are grounded. One end of the coil of the relay is connected to a second voltage source. The other end of the coil of the relay is connected to the collector of the transistor Q1. The switching part of the relay is connected to the power supply circuit of the tricycle. Figure 4 The coil of the relay is K1, and the switching part is K1-1, which is a normally closed switch. When the relay is powered on, the normally closed switch is opened.

[0036] Therefore, only when the brake action reaches the limit position, the Hall sensor 7 triggers the electric signal, and the vehicle speed reaches the upper limit, the logic judgment of the AND gate circuit 93 is high, so that the triode Q1 in the switch circuit 94 is turned on, the relay is powered on, the normally closed switch is opened, and the power-off protection is realized.

[0037] The above embodiments only illustrate the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rear axle suspension structure of a three-wheeled vehicle, comprising a frame (1), suspension arms (2), a rear wheel drive assembly (3) and shock absorbers (4), the frame (1) being provided with the rear wheel drive assembly (3) on both sides through the suspension arms (2), the rear wheel drive assembly (3) and the frame (1) being connected through two symmetrically arranged shock absorbers (4), characterized in that, Two brake assemblies (5) are arranged on the two bent rods (11) of the frame (1), and a mounting rack (13) is arranged on the bent rod (11), the mounting rack (13) is fixed with a clamping piece (14), and a lubricating sleeve (15) is arranged between the clamping piece (14) and the mounting rack (13); The brake assembly (5) comprises a brake shaft (51), a brake (52), a brake pull rod (53), and a brake puller (54), the brake shaft (51) is arranged on the lubricating sleeve (15), and the two ends of the brake shaft (51) are connected to the brake (52) located on the wheel through the brake pull rod (53), and the brake puller (54) is connected to the middle of the brake shaft (51). The brake puller (54) is clamped at the position of the cross beam (12) of the frame (1).

2. The rear suspension structure of a tricycle according to claim 1, wherein The cross beam (12) is provided with a clamping seat (16), the brake puller (54) comprises a fastening sleeve (541), a spring (542), a pulling rope (543), and a pulling arm (544), one end of the pulling arm (544) is fixed on the brake shaft (51), the other end of the pulling arm (544) is fixed on the pulling rope (543), the spring (542) is further sleeved on the pulling rope (543), the spring (542) abuts against the fastening sleeve (541), the fastening sleeve (541) is sleeved on the pulling rope (543) and fixed on the clamping seat (16), and the clamping seat (16) is provided with a notch (17).

3. A trike rear suspension as claimed in claim 2, wherein, A magnet (6) is fixed on the pulling arm (544), a Hall sensor (7) for sensing the active stroke position of the magnet (6) is fixed on the mounting rack (13), when the pulling arm (544) carrying the magnet (6) moves to the limit position, the Hall sensor (7) senses the magnet (6) and triggers an electrical signal.

4. The rear suspension structure of a tricycle according to claim 3, wherein A speed sensor (8) is arranged on the wheel of the rear wheel drive assembly (3), and the Hall sensor (7) and the speed sensor (8) are connected with a protection circuit (9), the protection circuit (9) comprises a comparator (91), a reference circuit (92), an "and" gate circuit (93), and a switching circuit (94), the Hall sensor (7) is connected with the first input end of the "and" gate circuit (93), the reference circuit (92) is connected with the inverting input end of the comparator (91), the speed sensor (8) is connected with the non-inverting input end of the comparator (91), the output end of the comparator (91) is connected with the second input end of the "and" gate circuit (93), the output end of the "and" gate circuit (93) is connected with the switching circuit (94), and the switching circuit (94) is used for making power-off action for power supply of the tricycle.

5. A trike rear suspension as claimed in claim 4, wherein, The reference circuit (92) comprises a first voltage source, a resistor R2 and a potentiometer Rp1, one end of the resistor R2 is connected with the first voltage source, the other end of the resistor R2 is connected with the potentiometer Rp1, the resistance end of the potentiometer Rp1 is grounded, and the adjusting end of the potentiometer Rp1 is connected with the inverting input end of the comparator (91) for inputting a threshold setting signal.

6. The rear suspension structure of a tricycle according to claim 4, wherein The switch circuit (94) comprises a resistor R3, a resistor R4, a transistor Q1 and a relay, one end of the resistor R3 is connected with the output end of the AND gate circuit (93), the other end of the resistor R3 is connected with one end of the resistor R4 and the base of the transistor Q1, the other end of the resistor R4 and the emitter of the transistor Q1 are grounded, one end of the coil of the relay is connected with the second voltage source, the other end of the coil of the relay is connected with the collector of the transistor Q1, and the switch part of the relay is connected on the power supply circuit of the tricycle.

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