Manual pressure brake mechanism of small-sized non-motorized trailer and small-sized non-motorized trailer

Abstract

The invention provides a manual pressure brake mechanism of a small non-motorized trailer and a small non-motorized vehicle. The pressure brake mechanism is composed of a hand brake mechanism 6, a limiting device 7, a piston device 8 and a friction disc 9. According to the working principle, when the non-motorized trailer is parked, the hand brake mechanism 6 is manually pushed to be limited, the hand brake mechanism 6 drives the friction disc 9 through the piston device 8 to press the surfaces of tires, and the braking effect is achieved. When the trailer is ready to run, the hand brake mechanism 6 is manually pushed away from limiting, the piston device 8 drives the friction disc 9 to be away from the tire surface, and braking is relieved. The pressure brake mechanism can effectively solve the problem that in the design of a parking brake device of a small non-motorized trailer, a brake drum with the appropriate outer diameter and a brake disc with the appropriate brake force are difficult to select, the limitation of existing drum type brake and disc type brake forms can be made up, and stable and convenient parking brake is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of military and civilian general-purpose vehicle braking, and in particular to a manual brake pressure mechanism for a small non-motorized trailer and the small non-motorized trailer. Background Art

[0002] The brake mechanism is a safety mechanism that must be equipped for non-motorized vehicles. Its function is to enable the non-motorized vehicle to stop accurately and stably at the expected position when braking. Whether the brake mechanism can work stably and conveniently is the key to the normal operation of the vehicle, so the brake performance directly affects the safety and working reliability of non-motorized vehicles.

[0003] The brake mechanism mainly includes two devices: service brake and parking brake. The function of the service brake is to slow down or stop the vehicle in motion, and the function of the parking brake is to keep the vehicle parked on the road still. For cost and safety considerations, non-motorized trailers often use parking brakes, that is, manual brakes.

[0004] At present, there are two main types of vehicle braking, namely drum brakes and disc brakes. Drum brakes are composed of brake drums, brake shoes, friction linings, return springs, cams and other components. The friction linings and the inner side of the brake drum that rotates with the wheel produce a braking effect. This type of brake has low manufacturing costs and stable operation, but poor heat dissipation performance, and it is difficult to repair and replace parts. In addition, the size of the brake drum is constrained by the diameter of the wheel hub, and it is not suitable for smaller tires. Disc brakes are composed of brake discs, brake calipers, brake pads, pistons, and brake wheel cylinders. The brake effect is mainly produced by pushing the brake caliper to make the brake pads on the caliper rub against the brake disc on the wheel. This type of brake has a beautiful appearance and fast heat dissipation, but it is difficult to maintain, has poor stability, and is costly. In addition, the size of the brake caliper is constrained by the thickness of the tire and the installation space, and it is difficult to adapt to small trailers. Summary of the invention

[0005] The present invention proposes a manual brake pressing mechanism for a small non-motorized trailer, which effectively solves the problem of difficulty in selecting a brake drum with a suitable outer diameter and a brake pad with a suitable braking force in the design of a parking brake device for a small non-motorized trailer, and can make up for the limitations of existing drum brakes and disc brakes to achieve stable and convenient parking brakes.

[0006] The embodiment of the present invention provides a manual brake mechanism for a small non-motorized trailer. The brake mechanism 2 is arranged on a trailer frame 3 corresponding to a rear wheel train 5 of the small non-motorized trailer. The brake mechanism 2 includes: a hand brake mechanism 6, a limit device 7, a piston device 8 and a friction disc 9.

[0007] The handbrake mechanism 6 comprises a driving rod 10, a first driven rod 11, a second driven rod 12, a first hinge pin 13, a second hinge pin 14 and a rubber anti-slip grip 15. The driving rod 10 and the first driven rod 11 are fixed to the trailer frame 3 by the first hinge pin 13. The driving rod 10 and the first driven rod 11 are nested and constrained to rotate together, and the first driven rod 11 drives the second driven rod 12 to move up and down linearly.

[0008] The limiting device 7 is composed of a helical tension spring 16 and a limiting block 17. The limiting block 17 is welded to the inner side of the trailer frame. The helical tension spring 16 connects the first hinge pin 13 and the second hinge pin 14 passing through the limiting block 17, and continuously provides a downward pulling force to the second hinge pin 14, so as to ensure that the hand brake mechanism 6 is tightened and fixed in the limiting state.

[0009] The piston device 8 is fixedly connected to the friction disk 9. The piston device 8 is composed of a piston fixing flange 18, a cover plate 19, a piston block 20, a fixing pin 21, a helical compression spring 22, a cushion block 23, an M4 screw 24 and an M2 screw 25. The cushion block 23 limits the axial freedom of the second driven rod 12. The second driven rod 12 passes through the piston block 20 and the friction disk 9 connected by the fixing pin 21, converts the circular motion of the driving rod 10 into linear motion, drives the piston block 20 and the friction disk 9 to move, and squeezes the upper surface of the tire of the rear wheel train 5.

[0010] In some embodiments, the piston block 20 and the helical compression spring 22 are installed together in the piston fixing flange 18, and the helical compression spring 22 plays the role of brake buffering and brake release and reset.

[0011] In some embodiments, the cover plate 19 uses a mortise and tenon structure to seal the outer side of the piston fixing flange 18, and the cover plate 19 and the piston fixing flange 18 are fixed to the trailer frame 3 using the M4 screws 24 and the M2 screws 25.

[0012] In some embodiments, in the parking brake state, the driving rod 10 is pushed clockwise, and the second driven rod 12 is pressed downward to drive the piston block 20 and the friction disc 9 downward, and the squeezed spiral compression spring 22 plays a buffering and vibration reduction role. Finally, the driving rod 10 reaches the brake limit, the friction disc 9 presses the tire of the rear wheel train 5, and the spiral tension spring 16 tightens the handbrake mechanism 6 to fix it.

[0013] In some embodiments, when the brake is released, the driving rod 10 is pushed counterclockwise, and the second driven rod 12 is lifted to drive the piston block 20 and the friction plate 9 upward, and finally the driving rod 10 reaches the driving limit position, the friction plate 9 is away from the tire of the rear wheel train 5, and the spiral tension spring 16 tightens the handbrake mechanism 6 to fix it.

[0014] An embodiment of the present invention provides a small non-motorized trailer, comprising: a steering and traction mechanism 1, a trailer frame 3, a front wheel train 4, a rear wheel train 5 and a brake mechanism 2 as described in any of the above embodiments, wherein the brake mechanism 2 is arranged in a groove of the trailer frame 3 corresponding to the rear wheel train 5.

[0015] The beneficial effects of the above embodiments include:

[0016] The main features of this braking form are that the spare structure on the trailer channel steel frame is fully utilized, the groove is dug to achieve a reasonable limit position, and the connecting rod type hand brake mechanism 6 is connected by a hinge pin, so that the driven rod of the hand brake mechanism 6 drives the piston device 8 to move in a normal straight line, pushing the friction disc 9 with a conformal design to squeeze the upper surface of the tire. This braking form can not only stably and conveniently achieve parking braking, but also maintain the unity of the shape of the friction disc and the shape of the tire, and is not restricted by the diameter of the small trailer tire. It is low in cost and easy to maintain, providing a new choice for the parking brake device of small non-motorized trailers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings illustrate generally, by way of example and not limitation, various embodiments discussed herein.

[0018] Figure 1 This is a schematic diagram of the application of the brake mechanism in a small non-motorized trailer;

[0019] Figure 2 It is a schematic diagram of the structure of the brake pressing mechanism;

[0020] Figure 3 It is a schematic diagram of the structure of the handbrake mechanism;

[0021] Figure 4 It is a schematic diagram of the structure of the limit device;

[0022] Figure 5A and 5B They are the axial side and cross-sectional structural schematic diagrams of the piston device and the friction disc respectively;

[0023] Fig. 6A , 6B 6C and 6D are schematic diagrams of the operation of the brake mechanism in the braking state, the outer side surface in the braking state, the outer side surface in the brake release state and the inner side surface in the brake release state, respectively.

[0024] Explanation of symbols:

[0025] 1-steering and traction mechanism; 2-brake mechanism; 3-trailer frame; 4-front wheel train; 5-rear wheel train; 6-handbrake mechanism; 7-limiting device; 8-piston device; 9-friction plate; 10-driving rod; 11-first driven rod; 12-second driven rod; 13-first hinge pin; 14-second hinge pin; 15-rubber anti-slip handle; 16-helical tension spring; 17-limiting block; 18-flange; 19-cover plate; 20-piston block; 21-fixing pin; 22-helical compression spring; 23-pad; 24-M4 screw; 25-M2 screw. DETAILED DESCRIPTION

[0026] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0027] In the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection or a connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] It should be noted that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects, and do not represent a specific order for the objects. It is understandable that the specific order or sequence of "first\second\third" can be interchanged where permitted. It should be understood that the objects distinguished by "first\second\third" can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0029] The present invention provides a manual brake pressing mechanism for a small non-motorized trailer. Figure 1 The application of the brake mechanism in a small non-motorized trailer is shown in FIG. Figure 1 As shown, the small non-motorized trailer includes: a steering and traction mechanism 1, a trailer frame 3, a front wheel train 4 and a rear wheel train 5, and a brake mechanism 2 is arranged in a groove of the trailer frame 3 corresponding to the rear wheel train 5.

[0030] like Figure 2 As shown, the brake pressing mechanism 2 includes a hand brake mechanism 6 , a limit device 7 , a piston device 8 and a friction disc 9 .

[0031] Among them, Figure 3As shown, the handbrake mechanism 6 is composed of a driving rod 10, a first driven rod 11, a second driven rod 12, a first hinge pin 13, a second hinge pin 14 and a rubber anti-skid grip 15. The driving rod 10 and the first driven rod 11 are fixed to the trailer frame 3 by the first hinge pin 13, and the two are nested and constrained to achieve common rotation, and the first driven rod 11 drives the second driven rod 12 to move up and down linearly. On the other hand, the driving rod is connected to the groove on the trailer frame 3 through the second hinge pin 14 to constrain the movement path of the driving rod 10. Considering the anti-skid performance, safety and comfort of the operator during operation, a set of rubber anti-skid grips 15 are selected and installed on the operating end of the driving rod 10.

[0032] like Figure 4 As shown, the limiting device 7 is composed of a helical tension spring 16 and a limiting block 17. The limiting block 17 is welded to the inner side of the trailer frame, and the slot position is consistent with the slot on the frame. The tension spring 16 connects the first hinge pin 13 passing through the limiting block 17 and the second hinge pin 14, and continuously provides a downward pulling force to the second hinge pin 14 to ensure that the connecting rod mechanism is tightened and fixed in the limiting state.

[0033] The piston device 8 and the friction plate 9 are fixedly connected, wherein, as Figure 5A and Figure 5B As shown, the piston device is composed of a piston fixing flange 18, a cover plate 19, a piston block 20, a fixing pin 21, a helical compression spring 22, a pad 23, an M4 screw 24 and an M2 screw 25. The pad 23 limits the axial freedom of the second driven rod 12. The second driven rod 12 passes through the piston block 20 and the friction plate 9 connected by the fixing pin 21, converts the circular motion of the driving rod into linear motion, drives the piston block and the friction plate to move, and squeezes the upper surface of the tire. The piston block 20 and the helical compression spring 22 are installed together in the piston fixing flange 18, and the compression spring plays the role of brake buffering and brake release reset. Considering that the designable space on the piston fixing flange 18 is small, the mortise and tenon structure cover plate 19 is used to block the outer side of the flange, and the cover plate and the flange are fixed to the frame with M4 screws 24 and M2 screws 25.

[0034] In actual use, Fig. 6A and Figure 6B As shown, in the parking brake state, the driving rod 10 is pushed clockwise, and the second driven rod 12 is pressed downward to drive the piston block and the friction plate downward, and the squeezed spiral compression spring plays a buffering and vibration reduction role. Finally, the driving rod 10 reaches the brake limit, the friction plate presses the trailer wheel, and the spiral tension spring 16 tightens the handbrake mechanism to achieve fixation. Figure 6C and Fig.6DAs shown, the braking state is released, the driving rod 10 is pushed counterclockwise, and the second driven rod 12 is lifted to drive the piston block and the friction plate upward. Finally, the driving rod 10 reaches the driving limit position, the friction plate is away from the trailer wheel, and the spiral tension spring 16 tightens the handbrake mechanism to achieve fixation.

[0035] The embodiment of the present invention provides a manual brake pressing mechanism for a small non-motorized trailer, such as Figure 1 As shown, the brake pressing mechanism 2 is arranged on the trailer frame 3 corresponding to the rear wheel train 5 of the small non-motorized trailer, as shown in FIG. Figure 2 As shown, the brake pressing mechanism 2 includes: a hand brake mechanism 6, a limit device 7, a piston device 8 and a friction disc 9.

[0036] like Figure 3 As shown, the handbrake mechanism 6 includes a driving rod 10, a first driven rod 11, a second driven rod 12, a first hinge pin 13, a second hinge pin 14 and a rubber anti-slip handle 15. The driving rod 10 and the first driven rod 11 are fixed to the trailer frame 3 by the first hinge pin 13, and the driving rod 10 and the first driven rod 11 are nested and constrained to rotate together, and the first driven rod 11 drives the second driven rod 12 to move up and down linearly.

[0037] like Figure 4 As shown, the limiting device 7 is composed of a helical tension spring 16 and a limiting block 17. The limiting block 17 is welded to the inner side of the trailer frame. The helical tension spring 16 connects the first hinge pin 13 and the second hinge pin 14 passing through the limiting block 17, and continuously provides a downward pulling force to the second hinge pin 14 to ensure that the handbrake mechanism 6 is tightened and fixed in the limiting state.

[0038] like Figure 5A and 5B As shown, the piston device 8 is fixedly connected to the friction plate 9. The piston device 8 is composed of a piston fixing flange 18, a cover plate 19, a piston block 20, a fixing pin 21, a helical compression spring 22, a cushion block 23, an M4 screw 24 and an M2 screw 25. The cushion block 23 limits the axial freedom of the second driven rod 12. The second driven rod 12 passes through the piston block 20 and the friction plate 9 connected by the fixing pin 21, converts the circular motion of the driving rod 10 into a linear motion, drives the piston block 20 and the friction plate 9 to move, and squeezes the upper surface of the tire of the rear wheel train 5.

[0039] In some embodiments, the piston block 20 and the helical compression spring 22 are installed together in the piston fixing flange 18, and the helical compression spring 22 plays the role of brake buffering and brake release and reset.

[0040] In some embodiments, the cover plate 19 uses a mortise and tenon structure to seal the outer side of the piston fixing flange 18 , and uses M4 screws 24 and M2 screws 25 to fix the cover plate 19 and the piston fixing flange 18 to the trailer frame 3 .

[0041] In some embodiments, Fig. 6A and 6B As shown, in the parking brake state, the driving rod 10 is pushed clockwise, and the second driven rod 12 is pressed downward to drive the piston block 20 and the friction plate 9 downward, and the squeezed spiral compression spring 22 plays a buffering and vibration reduction role. Finally, the driving rod 10 reaches the brake limit, the friction plate 9 presses the tire of the rear wheel train 5, and the spiral tension spring 16 tightens the handbrake mechanism 6 to fix it.

[0042] In some embodiments, Figure 6C and 6D As shown, in the brake release state, the driving rod 10 is pushed counterclockwise, and the second driven rod 12 is lifted to drive the piston block 20 and the friction plate 9 upward, and finally the driving rod 10 reaches the driving limit position, the friction plate 9 is away from the tire of the rear wheel train 5, and the spiral tension spring 16 tightens the handbrake mechanism 6 to fix it.

[0043] The embodiment of the present invention provides a small non-motorized trailer, such as Figure 1 As shown, it includes: a steering and traction mechanism 1, a trailer frame 3, a front wheel train 4, a rear wheel train 5 and a brake mechanism 2 of any of the above embodiments, and the brake mechanism 2 is arranged in the groove of the trailer frame 3 corresponding to the rear wheel train 5.

[0044] The technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A manual brake mechanism for a small non-motorized trailer, characterized in that: The brake pressing mechanism (2) is arranged on the trailer frame (3) corresponding to the rear wheel train (5) of the small non-motorized trailer, and the brake pressing mechanism (2) comprises: a hand brake mechanism (6), a limit device (7), a piston device (8) and a friction disc (9). The handbrake mechanism (6) comprises a driving rod (10), a first driven rod (11), a second driven rod (12), a first hinge pin (13), a second hinge pin (14) and a rubber anti-slip grip (15); the driving rod (10) and the first driven rod (11) are fixed to the trailer frame (3) by the first hinge pin (13); the driving rod (10) and the first driven rod (11) are nested and constrained to rotate together, and the first driven rod (11) drives the second driven rod (12) to move up and down in a straight line; The limiting device (7) is composed of a helical tension spring (16) and a limiting block (17), wherein the limiting block (17) is welded to the inner side of the trailer frame, and the helical tension spring (16) connects the first hinge pin (13) and the second hinge pin (14) passing through the limiting block (17), and continuously provides a downward pulling force to the second hinge pin (14), thereby ensuring that the handbrake mechanism (6) is tightened and fixed in the limiting state; The piston device (8) and the friction disk (9) are fixedly connected. The piston device (8) is composed of a piston fixing flange (18), a cover plate (19), a piston block (20), a fixing pin (21), a helical compression spring (22), a cushion block (23), an M4 screw (24) and an M2 screw (25). The cushion block (23) limits the axial freedom of the second driven rod (12). The second driven rod (12) passes through the piston block (20) and the friction disk (9) connected by the fixing pin (21), converts the circular motion of the driving rod (10) into linear motion, drives the piston block (20) and the friction disk (9) to move, and squeezes the upper surface of the tire of the rear wheel train (5).

2. The manual brake pressing mechanism for a small non-motorized trailer according to claim 1, characterized in that: The piston block (20) and the helical compression spring (22) are installed together in the piston fixing flange (18), and the helical compression spring (22) plays the role of brake buffering and brake release and reset.

3. The manual brake pressing mechanism for a small non-motorized trailer according to claim 1, characterized in that: The cover plate (19) uses a mortise and tenon structure to seal the outer side surface of the piston fixing flange (18), and uses the M4 screws (24) and the M2 screws (25) to fix the cover plate (19) and the piston fixing flange (18) on the trailer frame (3).

4. The manual brake pressing mechanism for a small non-motorized trailer according to claim 1, characterized in that: In the parking brake state, the driving rod (10) is pushed clockwise, and the second driven rod (12) is pressed downward to drive the piston block (20) and the friction disk (9) downward, and the squeezed spiral compression spring (22) plays a buffering and vibration reduction role. Finally, the driving rod (10) reaches the brake limit, the friction disk (9) presses the tire of the rear wheel train (5), and the spiral tension spring (16) tightens the hand brake mechanism (6) to achieve fixation.

5. The manual brake pressing mechanism for a small non-motorized trailer according to claim 1, characterized in that: In the brake release state, the driving rod (10) is pushed counterclockwise, and the second driven rod (12) is lifted to drive the piston block (20) and the friction plate (9) upward, and finally the driving rod (10) reaches the driving limit position, the friction plate (9) is away from the tire of the rear wheel train (5), and the helical tension spring (16) tightens the hand brake mechanism (6) to achieve fixation.

6. A small non-motorized trailer, characterized in that: include: A steering and traction mechanism (1), a trailer frame (3), a front wheel train (4), a rear wheel train (5), and a brake pressure mechanism (2) as described in any one of claims 1 to 5, wherein the brake pressure mechanism (2) is arranged in a groove of the trailer frame (3) corresponding to the rear wheel train (5).

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