Anti-freezing quick return mechanism of low-temperature-resistant hydraulic brake pump

Abstract

The utility model discloses an anti-freezing quick return mechanism of a low-temperature-resistant hydraulic brake pump, which comprises a cylinder body, a heating component is wrapped on the outer wall of the cylinder body, a piston component is hermetically connected to the position, close to one end, in the cylinder body, a return structure is connected to the inner wall of the cylinder body in a clamping manner, and an oil pot is mounted at the top of the cylinder body. An oil outlet pipe is fixedly connected to the position, close to the tail end, of the top of the cylinder body, and the oil outlet pipe communicates with the interior of the cylinder body, so that when the brake pump is used, hydraulic oil in the brake pump can enter the brake pipe through the oil outlet pipe. The resistance heating wire is combined with the heat preservation layer, the temperature of oil can be rapidly increased to the flowing state, freezing is prevented, meanwhile, the cold-resistant sealing ring and the low-temperature lubricating grease reduce friction resistance in the low-temperature environment, flexible movement of the piston is ensured, the high-strength alloy spring and the guide sleeve structure are matched, the return path is optimized, and the return speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic braking system application technology, and in particular to a low-temperature resistant hydraulic brake pump antifreeze rapid return mechanism. Background Technology

[0002] The forklift braking system mainly consists of a brake pedal, brake pump, wheel brakes, and brake lines. The hydraulic brake pump converts the driver's pedal force into hydraulic pressure, which is then transmitted to the wheel brakes through the brake lines. The wheel brakes then convert the hydraulic pressure into mechanical force, enabling the wheel brakes to apply the brakes. A stable and reliable braking system is a key factor in the efficiency of forklift handling.

[0003] In cold regions or low-temperature environments, hydraulic brake pumps often experience delayed return or jamming due to fluid solidification and freezing of moving parts, affecting the reliability of the braking system. Traditional antifreeze measures mostly rely on fluid additives or external heating devices, but these have drawbacks such as high cost and slow response. In addition, the return spring of existing brake pumps is easily affected by low temperatures, resulting in decreased elasticity and increased piston return resistance, which affects braking efficiency. Therefore, this utility model proposes an antifreeze and rapid return mechanism for a low-temperature resistant hydraulic brake pump. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a low-temperature resistant hydraulic brake pump antifreeze rapid return mechanism. By combining a resistance heating wire with an insulation layer, the oil temperature can be quickly raised to a flowable state to prevent freezing. At the same time, the cold-resistant sealing ring and low-temperature grease reduce frictional resistance in low-temperature environments, ensuring flexible piston movement. In addition, the high-strength alloy spring and guide sleeve structure optimize the return path and improve the return speed.

[0005] To solve the above-mentioned technical problems, the present invention provides a low-temperature resistant hydraulic brake pump antifreeze rapid return mechanism, including a cylinder body, a heating component wrapped around the outer wall of the cylinder body, a piston assembly sealed and connected to the inside of the cylinder body near one end, a return structure engaged with the inner wall of the cylinder body, and an oil reservoir installed on the top of the cylinder body.

[0006] The present invention is further configured such that: an oil outlet pipe is fixedly connected to the center of the tail end of the cylinder, and the oil outlet pipe is connected to the interior of the cylinder.

[0007] The above technical solution facilitates the flow of hydraulic oil from the brake pump into the brake pipe through the outlet pipe when the brake pump is in use.

[0008] The present invention is further configured such that: the heating component includes a resistance heating wire tightly wrapped around the outer wall of the cylinder body, and the outer wall of the resistance heating wire is tightly wrapped with a heat insulation layer.

[0009] The above technical solution utilizes an internal resistance heating wire to heat the hydraulic oil inside the cylinder, and the insulation layer prevents heat loss, thus improving the internal insulation effect.

[0010] The present invention is further configured such that: the piston assembly includes a sealing cover that is threaded onto the cylinder port position, a push rod is provided through the center of the sealing cover, the end face of the push rod is fixedly connected to the piston, the outer wall of the piston is wrapped with a cold-resistant sealing ring, and the inside is filled with low-temperature grease.

[0011] Through the above technical solution, the push rod can drive the piston to slide on the inner wall of the guide sleeve, and under the action of the cold-resistant sealing ring, the internal low-temperature lubricating grease can improve the smoothness.

[0012] The present invention is further configured such that: the return structure includes a guide sleeve that is interference-fitted to the inside of the cylinder, and the inner wall of the guide sleeve is provided with a polytetrafluoroethylene friction-reducing layer; the end face of the guide sleeve is pressed against a limiting groove opened on the inner wall of the cylinder by a sealing gasket; the end face of the guide sleeve is provided with an annular buckle; the inner wall of the guide sleeve is provided with multiple spiral guide grooves; and the inner wall of the guide sleeve is provided with an alloy spring, and the two ends of the alloy spring are tapered and gradually changed.

[0013] The above technical solution utilizes a ring-shaped buckle to secure the guide sleeve installed inside the cylinder body, thereby fixing it against the sealing gasket. Furthermore, the PTFE anti-friction layer allows the piston to slide smoothly on the inner wall of the guide sleeve, reducing friction. Simultaneously, numerous spiral guide grooves inside the guide sleeve allow the hydraulic oil to circulate and prevent static cooling, quickly forming a dynamic oil film between the piston and the guide sleeve. Combined with the internal alloy spring, this enables rapid return to its original position.

[0014] The present invention is further configured such that the annular buckle is a four-fifths circle and is engaged with a corresponding slot on the inner wall of the cylinder.

[0015] The above technical solution allows the elasticity of the ring buckle to be used to quickly engage and connect to the inside of the slot, and to position and fix the internal guide sleeve, while also facilitating quick disassembly later.

[0016] The present invention is further configured such that: positioning holes B and positioning holes A are respectively provided on the outer walls of the guide sleeve and the cylinder near the end face, the positioning holes B and positioning holes A are coaxially arranged, and the inner walls are threaded with positioning threaded tubes, and the positioning threaded tubes connect the oil can and the guide sleeve.

[0017] The above technical solution facilitates the positioning and fixing of the guide sleeve and the cylinder body by using a positioning threaded tube after the guide sleeve is installed inside the cylinder body, and also facilitates the entry of hydraulic oil from the oil reservoir into the interior of the guide sleeve.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The antifreeze rapid return mechanism of the low-temperature hydraulic brake pump proposed in this utility model combines a resistance heating wire with an insulation layer, which can quickly raise the oil temperature to a flowing state and prevent freezing.

[0020] 2. The antifreeze and fast return mechanism of the low-temperature hydraulic brake pump proposed in this utility model reduces frictional resistance in low-temperature environments through cold-resistant sealing rings and low-temperature lubricating grease, ensuring flexible piston movement. It also optimizes the return path and improves the return speed by combining high-strength alloy springs and guide sleeve structure. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an antifreeze and rapid return mechanism for a low-temperature hydraulic brake pump according to this utility model.

[0022] Figure 2 This is a cross-sectional view of the antifreeze and rapid return mechanism of a low-temperature resistant hydraulic brake pump according to this utility model.

[0023] Figure 3 This is a structural diagram of the cylinder body in the antifreeze rapid return mechanism of a low-temperature hydraulic brake pump according to this utility model;

[0024] Figure 4 This is a structural diagram of the heating component in the antifreeze rapid return mechanism of a low-temperature hydraulic brake pump according to this utility model;

[0025] Figure 5 This is a structural diagram of the return structure in the antifreeze rapid return mechanism of a low-temperature hydraulic brake pump according to this utility model;

[0026] Figure 6 This is a structural diagram of the annular buckle in the antifreeze and rapid return mechanism of a low-temperature hydraulic brake pump according to this utility model.

[0027] In the diagram: 1. Cylinder block; 11. Limiting groove; 12. Slot; 13. Oil outlet pipe; 14. Positioning hole A; 2. Heating assembly; 21. Resistance heating wire; 22. Insulation layer; 3. Piston assembly; 31. Sealing cap; 32. Push rod; 33. Piston; 34. Cold-resistant sealing ring; 4. Return structure; 41. Guide sleeve; 42. Sealing gasket; 43. Ring buckle; 44. Positioning hole B; 45. Spiral guide groove; 46. Alloy spring; 5. Oil can; 51. Positioning threaded pipe. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] like Figures 1-4 As shown, a low-temperature resistant hydraulic brake pump antifreeze rapid return mechanism includes a cylinder body 1. An oil outlet pipe 13 is fixedly connected to the center of the tail end of the cylinder body 1, and the oil outlet pipe 13 is connected to the interior of the cylinder body 1, facilitating the flow of hydraulic oil into the brake pipe through the oil outlet pipe 13 when the brake pump is in use. A heating assembly 2 is wrapped around the outer wall of the cylinder body 1. The heating assembly 2 includes a resistance heating wire 21 tightly wrapped around the outer wall of the cylinder body 1. An insulation layer 22 is tightly wrapped around the outer wall of the resistance heating wire 21. The internal resistance heating wire 21 can heat the hydraulic oil inside the cylinder body 1. The insulation layer 22 prevents heat loss and improves the internal insulation effect. A piston assembly 3 is sealed and connected to one end of the cylinder body 1. The piston assembly 3 includes a sealing cover 31 that is threaded and fits into the port of the cylinder body 1. A push rod 32 is provided through the center of the sealing cover 31. A piston 33 is fixedly connected to the end face of the push rod 32. The outer wall of the piston 33 is wrapped with a cold-resistant sealing ring 34 and filled with low-temperature grease. The push rod 32 can drive the piston 33 to slide on the inner wall of the guide sleeve 41. Under the action of the cold-resistant sealing ring 34, the low-temperature grease inside improves the smoothness.

[0030] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, a return structure 4 is engaged with the inner wall of the cylinder body 1. The return structure 4 includes a guide sleeve 41 that is interference-fitted into the inside of the cylinder body 1. The inner wall of the guide sleeve 41 is provided with a polytetrafluoroethylene (PTFE) anti-friction layer. Positioning holes B44 and A14 are respectively opened on the outer wall of the guide sleeve 41 and the cylinder body 1 near the end face. Positioning holes B44 and A14 are coaxially arranged, and a positioning threaded tube 51 is threadedly connected to the inner wall. The positioning threaded tube 51 connects the oil reservoir 5 and the guide sleeve 41, facilitating the... After the guide sleeve 41 is installed inside the cylinder body 1, the positioning threaded tube 51 is used to position and fix the guide sleeve 41 and the cylinder body 1, and to facilitate the entry of hydraulic oil from the oil reservoir 5 into the guide sleeve 41. The end face of the guide sleeve 41 is pressed against the limiting groove 11 opened on the inner wall of the cylinder body 1 by the sealing gasket 42. The end face of the guide sleeve 41 is provided with an annular buckle 43, which is a four-fifths ring and is engaged with the corresponding groove 12 opened on the inner wall of the cylinder body 1, which facilitates the use of the ring. The elasticity of the snap-fit ​​43 allows it to quickly engage with the inside of the slot 12 and position and fix the internal guide sleeve 41, while facilitating quick disassembly later. The inner wall of the guide sleeve 41 has multiple spiral guide grooves 45, and an alloy spring 46 is provided on the inner wall of the guide sleeve 41. The two ends of the alloy spring 46 are tapered and gradually changed. The snap-fit ​​43 is used to fix the guide sleeve 41 installed inside the cylinder 1 and the sealing gasket 42 against the inside of the cylinder 1. The polytetrafluoroethylene friction-reducing layer allows the internal piston 33 to slide smoothly on the inner wall of the guide sleeve 41, thereby reducing the friction between them. At the same time, the numerous spiral guide grooves 45 inside the guide sleeve 41 allow the internal hydraulic oil to circulate and prevent static cooling, and can quickly form a dynamic oil film between the piston 33 and the guide sleeve 41. With the help of the internal alloy spring 46, a quick return function can be achieved. An oil can 5 is installed on the top of the cylinder 1.

[0031] In use, the present invention first activates the resistance heating wire 21 to raise the internal temperature, and the heat loss is prevented by the heat insulation layer 22. Then, the piston 33 is driven by the push rod 32 to slide inside the guide sleeve 41. The polytetrafluoroethylene friction-reducing layer allows the piston 33 to slide smoothly on the inner wall of the guide sleeve 41, thereby reducing the friction between them. Under the action of the piston 33, the hydraulic oil is discharged into the brake pipe through the oil outlet pipe 13. At the same time, the hydraulic oil inside tumbles inside the spiral guide groove 45. After the push rod 32 is released, the internal alloy spring 46 is compressed and uses its own elasticity to make the piston 33 quickly return to its original position.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low-temperature resistant hydraulic brake pump antifreeze rapid return mechanism, comprising a cylinder (1), characterized in that: The outer wall of the cylinder (1) is covered with a heating assembly (2), the inside of the cylinder (1) is sealed with a piston assembly (3) near one end, the inner wall of the cylinder (1) is engaged with a return structure (4), and an oil can (5) is installed on the top of the cylinder (1). The return structure (4) includes a guide sleeve (41) that is interference-connected to the inside of the cylinder (1), and the inner wall of the guide sleeve (41) is provided with a polytetrafluoroethylene friction-reducing layer. The end face of the guide sleeve (41) is pressed against the limiting groove (11) opened on the inner wall of the cylinder (1) by a sealing gasket (42). The end face of the guide sleeve (41) is provided with an annular buckle (43). The inner wall of the guide sleeve (41) is provided with multiple spiral guide grooves (45). The inner wall of the guide sleeve (41) is provided with an alloy spring (46), and the two ends of the alloy spring (46) are tapered and gradually changed. The ring buckle (43) is set as a four-fifths circle and is engaged with the corresponding slot (12) opened on the inner wall of the cylinder (1). The guide sleeve (41) and the cylinder (1) are respectively provided with positioning holes B (44) and A (14) near the end face of the outer wall. The positioning holes B (44) and A (14) are coaxially arranged, and the inner wall is threaded with a positioning threaded tube (51). At the same time, the positioning threaded tube (51) connects the oil can (5) and the guide sleeve (41).

2. The antifreeze rapid return mechanism for a low-temperature resistant hydraulic brake pump according to claim 1, characterized in that: An oil outlet pipe (13) is fixedly connected to the center of the tail end of the cylinder (1), and the oil outlet pipe (13) is connected to the interior of the cylinder (1).

3. The antifreeze rapid return mechanism for a low-temperature resistant hydraulic brake pump according to claim 1, characterized in that: The heating component (2) includes a resistance heating wire (21) tightly wrapped around the outer wall of the cylinder (1), and the outer wall of the resistance heating wire (21) is tightly wrapped with a heat insulation layer (22).

4. The antifreeze rapid return mechanism for a low-temperature resistant hydraulic brake pump according to claim 1, characterized in that: The piston assembly (3) includes a sealing cap (31) that is threaded onto the port of the cylinder (1). A push rod (32) is provided through the center of the sealing cap (31). A piston (33) is fixedly connected to the end face of the push rod (32). A cold-resistant sealing ring (34) is provided on the outer wall of the piston (33), and the interior is filled with low-temperature grease.

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