A manual hydraulic power system

Abstract

The present invention specifically relates to a manual hydraulic power system, which is used to solve the problem of low efficiency of existing manual pumps. The present invention includes a bracket, an oil tank, a pump structure, an oil circuit structure, a gear transmission structure, a crank handle, a breathable oil dipstick, a gear protection shell and a housing; an oil tank is fixed to the bottom of the front surface of the bracket, a connecting port of the oil circuit structure is provided on the oil tank and is connected to a breathable oil dipstick, a pump structure and an oil circuit structure are provided on the top of the front surface of the bracket, and the oil circuit structure is connected to the oil tank through a connecting port on the oil tank, a gear transmission structure is provided on the rear surface of the bracket, and the gear transmission structure is connected to the crank handle; the gear protection shell wraps the gear transmission structure; the housing wraps the pump structure and the oil circuit structure. The present invention can be used in a variety of environments.

Description

Technical Field

[0001] The invention belongs to a hydraulic power system, and in particular relates to a manual hydraulic power system. Background Art

[0002] A manual pump is a human-driven device that can ultimately generate high-pressure hydraulic oil. It can provide high-pressure hydraulic oil when no other power other than human power is required. Currently, most of them are double-plunger designs plus a lever design. The swing of the lever drives the plunger to move. Although it is simple, it has a small flow rate and low efficiency. Summary of the invention

[0003] The invention provides a manual hydraulic power system for solving the problem of low efficiency of the existing manual pump.

[0004] The technical method of the present invention is as follows:

[0005] A manual hydraulic power system, which is special in that it includes a bracket, an oil tank, a pump structure, an oil circuit structure, a gear transmission structure and a crank;

[0006] The bracket includes a main board, a top board, and a bottom board; the top board is vertically fixedly connected to the middle of the main board, and the bottom board is vertically fixedly connected to the bottom of the main board;

[0007] The oil tank is fixed between the top plate and the bottom plate;

[0008] The pump structure includes a bidirectional plunger pump fixed to the front surface of the main board;

[0009] The gear transmission structure includes a driving gear disposed on the rear surface of the main board and a driven gear meshing with the driving gear; the driven gear is coaxially fixedly connected to the power end of the bidirectional plunger pump;

[0010] The crank is coaxially fixedly connected to the driving gear;

[0011] The oil circuit structure is arranged between the oil tank and the pump structure.

[0012] Furthermore, the oil circuit structure includes an oil suction pipeline, an oil outlet pipeline, an oil drain pipe, a heating pipeline and an oil return pipeline;

[0013] The oil suction pipeline includes an inner oil suction pipe and an outer oil suction pipe located inside the oil tank;

[0014] One end of the inner oil suction pipe is located inside the oil tank, and the other end passes through the oil tank and is connected to one end of the outer oil suction pipe;

[0015] The other end of the external oil suction pipe is fixedly connected to a bidirectional plunger pump;

[0016] The oil outlet pipeline includes an oil pump pipe, an oil pump check valve, an external oil outlet pipe, a pipe valve bracket and a pressure gauge;

[0017] One end of the oil pump pipe is fixedly connected to the bidirectional plunger pump, and the other end is connected to the external oil outlet pipe through the oil pump one-way valve; the oil pump one-way valve is fixed on the pipe valve bracket, and the pipe valve bracket is fixedly connected to the upper surface of the main plate of the bracket. A pressure gauge is fixed on the pipe valve bracket, and the pressure gauge is connected to the oil pump one-way valve;

[0018] One end of the oil drain pipe is connected to the oil tank, and the other end is connected to the bidirectional plunger pump;

[0019] The heating pipeline includes a reverse one-way valve and a heating oil pipe fixedly connected to the pipe valve bracket;

[0020] One end of the reverse check valve is fixedly connected to the pump oil pipe, and the other end is fixedly connected to one end of the heating oil pipe; the other end of the heating oil pipe extends into the oil tank, is coiled, and then extends out of the oil tank, and is fixedly connected to one end of the external oil suction pipe;

[0021] The oil return pipeline includes an oil return pipe and a stop valve fixedly connected to a pipe and valve bracket; the oil return pipe is connected to an external oil outlet pipe through the stop valve, and the other end of the oil return pipe extends into the oil tank.

[0022] Furthermore, it also includes a breathable oil dipstick arranged on the oil tank, the breathable oil dipstick includes a gland, a waterproof breathable membrane, a sleeve column, an oil dipstick and a sponge ring;

[0023] The sleeve column is a hollow structure, the gland is located inside the top of the sleeve column and the two are interference fit; a side cavity is formed between the side of the gland and the sleeve column; a sponge ring is placed inside the side cavity; a waterproof and breathable membrane is provided on the end surface of the lower end of the gland that contacts the sleeve column; the waterproof and breathable membrane divides the hollow structure of the sleeve column into a gland chamber and a sleeve column chamber;

[0024] The side surface of the gland is provided with a plurality of small holes along the circumferential direction, so that the side cavity and the gland chamber are connected;

[0025] The side of the sleeve is provided with a plurality of small holes for connecting the side cavity with the external environment and the sleeve chamber with the external environment;

[0026] The center of the bottom of the sleeve column is connected with an oil dipstick through threads;

[0027] The outer circle of the bottom of the sleeve column is connected to the oil tank through threads.

[0028] Further, the oil tank includes an oil tank body, and an oil drain valve, a breathable oil dipstick seat, a hot oil pipe outlet seat, an oil suction pipe seat, a hot oil pipe inlet seat and an oil return pipe seat arranged on the oil tank body;

[0029] The oil tank body is a hollow structure and is located between the top plate and the bottom plate, and the oil drain valve is fixedly connected to the bottom of the outer side of the oil tank body;

[0030] An oil filter is fixed on the oil suction pipe seat and the hot oil pipe outlet seat;

[0031] The hot oil pipe outlet seat is used for the hot oil pipe to extend out of the oil tank body;

[0032] The oil suction pipe seat is connected with an inner oil suction pipe;

[0033] The hot oil pipe inlet seat is used for the heating oil pipe to extend into the oil tank body;

[0034] The oil return pipe seat is used for the oil return pipe to extend into the oil tank body;

[0035] The oil filter is fixedly connected to the external oil suction pipe, the oil drain pipe and the heating oil pipe;

[0036] The outer circle of the bottom of the sleeve column is connected to the breathable oil dipstick seat through threads, and a rubber pad is arranged between the breathable oil dipstick seat and the shoulder ring structure on the outer circle of the sleeve column.

[0037] Furthermore, the bidirectional plunger pump is provided with an oil suction articulated joint, an oil pumping articulated joint and an oil drain joint;

[0038] The bidirectional plunger pump is fixed to the upper surface of the main board, passes through the main board to connect the driven gear, and a cushion block is arranged between the main board and the main board;

[0039] The oil suction hinged joint is connected to the external oil suction pipe;

[0040] The oil pump articulated joint is connected to the oil pump pipe;

[0041] The oil drain joint is connected to the oil drain pipe.

[0042] Furthermore, the gear transmission structure also includes a cantilever shaft and a cantilever shaft seat;

[0043] The cantilever shaft is rotatably connected to the cantilever shaft seat, and the cantilever shaft seat is fixedly connected to the front surface of the main board; the cantilever shaft passes through the main board and is coaxially fixedly connected to the driving gear, and the end of the cantilever shaft is connected to the crank.

[0044] Furthermore, the crank comprises a fixed head, a rocker arm and a folding handle;

[0045] One end of the rocker arm is fixedly connected to a fixed head, the fixed head is fixedly connected to the end of the cantilever shaft, and the other end of the rocker arm is connected to a folding handle.

[0046] Furthermore, the oil dipstick is provided with two high liquid level holes and two low liquid level holes; the oil dipstick is also provided with scale lines.

[0047] Furthermore, it also includes a housing arranged on the front surface of the mainboard and a gear protection housing arranged on the rear surface of the mainboard;

[0048] The housing is located above the top plate and is used to protect the pump structure and the oil circuit structure; it includes a housing body, on which a movable cover plate is provided; the oil outlets of the pressure gauge and the external oil outlet pipe are both located outside the housing body;

[0049] The gear protection shell is used to protect the driving gear and the driven gear; the crank is located outside the gear protection shell.

[0050] Furthermore, the support also includes an auxiliary support;

[0051] One end of the auxiliary bracket is connected to the bottom plate, and the other end is connected to the top plate;

[0052] The bottom plate is provided with fixing holes for fixing the bracket.

[0053] The beneficial effects of the present invention are as follows:

[0054] (1) The bracket, oil tank, pump structure, oil circuit structure, gear transmission structure and crank in the present invention are reasonably arranged and compact as a whole, so that the system is small in size, easy to move, and can be used in a variety of environments.

[0055] (2) The present invention uses a novel breathable oil dipstick that is waterproof and dustproof by using small holes, cavities and breathable membranes in various places. The breathable oil dipstick is connected to the oil tank through a threaded hole set on the oil tank, and the threaded hole also serves as an oil filling port, saving space.

[0056] (3) In the present invention, human power drives the bidirectional piston pump through a crank and a transmission device. Gear pairs with different transmission ratios and crank combinations of different lengths can be replaced according to different application scenarios, and the flow rate of the high-pressure hydraulic oil can be controlled by manually controlling the rotation speed of the crank, so that the system can quickly adapt to a variety of working environments.

[0057] (4) In the present invention, the reversible pumping oil characteristic of the bidirectional piston pump is utilized, and a reversing heating pipeline is installed to heat the hydraulic oil in the oil tank and the pump when the bidirectional piston pump is reversed, so that the system can be used in a low temperature environment.

[0058] (5) In the present invention, a manual shut-off valve is provided in the oil return pipeline to adjust the oil return flow rate, and the system is provided with a pressure gauge to display the real-time pressure. It is convenient to accurately obtain the state of the system when using it, and then control the amount of oil.

[0059] (6) The crank handle of the present invention can be folded and removed, and after being removed, it can be placed in a storage position corresponding to the shell for storage, so as to prevent someone from accidentally touching the crank handle and causing oil to leak when the system is not in use.

[0060] (7) In the present invention, a shell is provided outside the system to protect the pipeline and the gear pair, so that the operating part of the stop valve and the pressure gauge are exposed, which is convenient for operation and observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0062] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0063] Figure 3 It is a schematic diagram of the support structure of the present invention;

[0064] Figure 4 It is a schematic diagram of the oil tank structure of the present invention;

[0065] Figure 5 It is a structural schematic diagram of the pump structure of the present invention;

[0066] Figure 6 It is a schematic diagram of the oil suction pipeline structure of the present invention;

[0067] Figure 7 It is a schematic diagram of the oil outlet pipeline structure of the present invention;

[0068] Figure 8 It is a schematic diagram of the heating pipeline structure of the pipe valve support of the present invention;

[0069] Fig. 9 It is a schematic diagram of the structure of the oil outlet pipeline and the oil drain pipeline of the bracket with a pipe valve of the present invention;

[0070] Fig.10 It is a schematic diagram of the gear transmission structure and the crank structure;

[0071] Fig.11 It is a structural schematic diagram of the breathable oil dipstick of the present invention;

[0072] Fig.12 It is a schematic diagram of the structure of the gear protection shell and the housing of the present invention.

[0073] The specific reference numerals are as follows:

[0074] 1. Bracket, 2. Oil tank, 3. Pump structure, 4. Oil circuit structure, 5. Gear transmission structure, 6. Crank, 7. Breathable oil dipstick, 8. Gear protection shell, 9. Shell, 10. Oil drain valve, 11. Oil tank body, 12. Breathable oil dipstick seat, 13. Hot oil pipe outlet seat, 14. Suction pipe seat, 15. Hot oil pipe inlet seat, 16. Return oil pipe seat, 17. Main board, 18. Auxiliary bracket, 19. Bottom plate, 20. Top plate, 21. Bracket cantilever shaft, 22. Cantilever shaft seat, 23. Driving gear, 24. Driven gear, 25. Bracket fixed head, 26. Rocker arm, 27. Folding handle, 28. Bidirectional plunger pump, 29. Gasket, 30. Oil suction hinged joint, 31. Pump oil hinged joint, 32. Oil drain joint, 33. Shell body, 34. Cover plate, 35. Oil suction pipeline, 36. Oil outlet pipeline, 37. Oil drain pipe, 38. Heating pipeline, 39. Oil return pipeline, 40. Internal oil suction pipe, 41. Oil filter, 42. External oil suction pipe, 43. Pump oil pipe, 44. Pump oil check valve, 45. External oil outlet pipe, 46. Pipe valve bracket, 47. Pressure gauge, 48. Reverse check valve, 49. Stop valve, 71. Pressure cap, 72. Waterproof breathable membrane, 73. Sleeve column, 74. Oil dipstick, 76. Rubber pad, 77. Sponge ring. DETAILED DESCRIPTION

[0075] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0076] A manual hydraulic power system, such as Figure 1 and Figure 2 As shown, it includes a bracket 1, an oil tank 2, a pump structure 3, an oil circuit structure 4, a gear transmission structure 5, a crank 6, a breathable oil dipstick 7, a gear protection shell 8 and a shell 9. The oil tank 2 is fixed in the inner cavity at the bottom of the bracket 1, and the breathable oil dipstick 7 is fixed on the oil tank 2. The pump structure 3 is arranged on the front surface of the upper part of the bracket 1; the oil circuit structure 4 is arranged between the oil tank 2 and the pump structure 3, and the oil circuit structure 4 is connected to the oil tank 2; the gear transmission structure 5 is arranged on the rear surface of the upper part of the bracket 1, and the gear protection shell 8 wraps the surface of the gear transmission structure 5 to protect the corresponding device, and the shell 9 wraps the pump structure 3 and the oil circuit structure 4 to protect the corresponding device.

[0077] like Figure 3 As shown, the bracket 1 includes a main board 17, an auxiliary bracket 18, a bottom plate 19, and a top plate 20. The bottom plate 19 is vertically fixedly connected to the bottom of the main board 17; the top plate 20 is vertically fixedly connected to the middle of the main board 17; the auxiliary bracket 18 is connected between the bottom plate 19 and the main board 20. The bottom plate 19 is provided with fixing holes for fixing the bracket 1.

[0078] like Figure 4As shown, the oil tank 2 includes an oil drain valve 10, an oil tank body 11, a breathable oil dipstick seat 12, a hot oil pipe outlet seat 13, an oil suction pipe seat 14, a hot oil pipe inlet seat 15, and an oil return pipe seat 16. The oil tank body 11 is located in a cavity formed by a bottom plate 19, an auxiliary bracket 18, a main plate 17, and a top plate 20. The oil tank body 11 is a hollow structure. The oil drain valve 10 is fixedly connected to the bottom of the outer side of the oil tank body 11. The upper surface of the oil tank body 11 is provided with a breathable oil dipstick seat 12, a hot oil pipe outlet seat 13, an oil suction pipe seat 14, a hot oil pipe inlet seat 15, and an oil return pipe seat 16 for connecting the oil circuit structure 4.

[0079] like Figure 5 As shown, the pump structure 3 includes a bidirectional plunger pump 28, a cushion block 29, and an oil suction articulated joint 30, an oil pumping articulated joint 31, and an oil discharge joint 32 arranged on the bidirectional plunger pump 28. The bidirectional plunger pump 28 is installed on the front surface of the main board 17 and passes through the main board 17. The cushion block 29 is fixed between the bidirectional plunger pump 28 and the main board 17. The end of the bidirectional plunger pump 28 located on the rear surface of the main board 17 is fixedly connected to the driven gear 24.

[0080] The oil circuit structure 4 includes an oil suction pipeline 35 , an oil outlet pipeline 36 , an oil drain pipe 37 , a heating pipeline 38 , and an oil return pipeline 39 .

[0081] like Figure 6 As shown, the oil suction line 35 includes an inner oil suction pipe 40 and an outer oil suction pipe 42 located inside the oil tank 2 .

[0082] One end of the inner oil suction pipe 40 is located inside the oil tank 2 , and the other end is connected to the oil suction pipe seat 14 located on the oil tank 2 ; an oil filter 41 is fixed on the oil suction pipe seat 14 .

[0083] One end of the oil drain pipe 37 is connected to the oil filter 41 , and the other end is connected to the oil drain interface 32 in the pump structure 3 , so as to transport the residual hydraulic oil in the pump structure to the inside of the oil tank 2 .

[0084] One end of an external oil suction pipe 42 is fixedly connected to the oil suction pipe seat 14 , and the other end of the external oil suction pipe 42 is fixedly connected to an oil suction hinged joint 30 located on the bidirectional plunger pump 28 .

[0085] like Figure 7 and Fig. 9 As shown, the oil outlet pipeline 36 includes an oil pumping pipe 43 with one end fixedly connected to the oil pumping articulated joint 31, the other end of the oil pumping pipe 43 is fixedly connected to one end of an oil pumping check valve 44, and the other end of the oil pumping check valve 44 is fixedly connected to an external oil outlet pipe 45, through which the liquid in the oil tank body 11 is directly transported to the outside of the system; the oil pumping check valve 44 is fixed on a pipe valve bracket 46, and the pipe valve bracket 46 is located on the front surface of the main board 17, and a pressure gauge 47 is fixed on the pipe valve bracket 46, and the pressure gauge 47 is connected to the oil pumping check valve 44.

[0086] The pipe and valve bracket 46 is fixedly connected to a reverse one-way valve 48 in the heating pipeline 38 and a stop valve 49 in the oil return pipeline 39 .

[0087] like Figure 8 As shown, the heating pipeline 38 includes a reverse check valve 48 and a heating oil pipe. One end of the reverse check valve 48 is fixedly connected to the pump oil pipe 43, and the other end is fixedly connected to one end of the heating oil pipe. The heating oil pipe extends into the oil tank 2 through the hot oil pipe outlet seat 13 and the hot oil pipe inlet seat 15 on the oil tank 2, and the other end of the heating oil pipe is fixedly connected to the external oil suction pipe 42 through the oil filter 41.

[0088] The oil return pipeline 39 includes an oil return pipe and a stop valve 49 ; the oil return pipe is connected to the external oil outlet pipe 45 through the stop valve 49 , and the other end of the oil return pipe extends into the oil tank 2 through the oil return pipe seat 16 .

[0089] like Fig.10 As shown, the gear transmission structure 5 includes a cantilever shaft 21, a cantilever shaft seat 22, a driving gear 23, and a driven gear 24. The cantilever shaft 21 is rotatably connected to the cantilever shaft seat 22, the cantilever shaft seat 22 is fixedly connected to the front surface of the main board 17, the cantilever shaft 21 passes through the corresponding hole on the main board, the protruding part of the cantilever shaft 21 is fixedly connected to the driving gear 23, the protruding end surface of the cantilever shaft 21 is connected to the crank 6, the driving gear 23 is meshed with the driven gear 24, and the crank 6 is indirectly connected to the driving gear 23 and the driven gear 24 through the cantilever shaft 21.

[0090] The crank 6 includes a fixed head 25, a rocker arm 26 and a folding handle 27. One end of the rocker arm 26 is fixedly connected to the fixed head 25, the fixed head 25 is fixed to the end of the cantilever shaft 21, and the other end of the rocker arm 26 is fixedly connected to the folding handle 27.

[0091] like Fig.11 As shown, the breathable oil dipstick 7 includes a pressure cap 71 , a waterproof breathable membrane 72 , a sleeve 73 , an oil dipstick 74 , a rubber pad 76 , and a sponge ring 77 .

[0092] The sleeve column 73 is an internal hollow structure and the outer side of the top is provided with knurling for roughening. The pressure cap 71 is located inside the top end of the sleeve column 73 and the two are interference fit. The bottom end face of the pressure cap 71 is provided with a waterproof breathable membrane 72 at the position where the contact between the sleeve column 73 and the bottom end face of the pressure cap 71 is provided. The waterproof breathable membrane 72 separates the inner cavity formed by the pressure cap 71 and the sleeve 73 into two parts. The waterproof breathable membrane 72 is fixed and pressed by the interference fit between the pressure cap 71 and the sleeve column 73.

[0093] After the gland 71, the waterproof breathable membrane 72 and the sleeve column 73 are connected together, a total of four cavities are generated, namely: a first chamber and a second chamber located on both sides of the gland 71 and generated by the gland 71 and the sleeve column 73, that is, the side cavity; a third chamber located between the inside of the gland 71 and the waterproof breathable membrane 72, that is, the gland chamber; and a fourth chamber located between the inside of the gland 71 and the waterproof breathable membrane 72, that is, the sleeve column chamber.

[0094] A sponge ring 77 is placed in each of the first and second chambers. A plurality of vent holes distributed in the circumferential direction are provided in the middle of the gland 71, so that the first, second and third chambers are connected. A small hole parallel to the axis is provided on the sleeve 73 to connect the first or second chamber with the external environment, and a plurality of small holes are provided at the bottom of the sleeve 73 to connect the fourth chamber with the external environment. An oil dipstick 74 is connected to the axis of the lower end of the sleeve 73 by a thread. The oil dipstick 74 is provided with two high liquid level holes and two low liquid level holes for storing oil, so that the oil dipstick 74 is easy to observe after being pulled out. A row of grooves is provided on the oil dipstick 74 as scale lines.

[0095] The outer circle at the bottom of the sleeve column 73 is provided with a thread for connecting with the breathable oil dipstick seat 12, and a rubber pad 76 is provided between the two for sealing.

[0096] like Fig.12 As shown, the gear protection housing 8 encloses the driving gear 23 and the driven gear 24 .

[0097] The shell 9 includes a shell body 33 and a cover plate 34. The shell body 33 encloses the two-way plunger pump 28 and the oil suction pipeline 35, the oil outlet pipeline 36, the oil drain pipe 37, the heating pipeline 38, and the oil return pipeline 39. A movable cover plate 34 is arranged on the side of the shell body 33. After removing the cover plate 34, the internal space can be used to place the folded handle 6.

[0098] The manual hydraulic power system has three working states: oil pumping, heating and oil return.

[0099] When pumping oil: the crank 6 rotates forward, and the two-way plunger pump 28 is driven to rotate through the gear pair. At this time, the hydraulic oil in the oil tank enters the two-way plunger pump 28 through the internal oil suction pipe 40, the oil suction pipe seat 14, the oil filter 41, the external oil suction pipe 42 and the oil suction articulated joint 30. The high-pressure hydraulic oil in the two-way plunger pump 28 is discharged to the outside through the cooperation of the oil pump pipe 43, the oil pump check valve 44 and the external oil outlet pipe 45 which are connected in sequence to the oil pump articulated joint 31.

[0100] During heating: the crank 6 rotates in the opposite direction, and the two-way piston pump 28 is driven to reverse through the gear pair. At this time, the heating oil pipe in the oil tank body 11 transports the hydraulic oil to the oil filter 41, the external oil suction pipe 42, the two-way piston pump 28, the pump oil pipe 43, the reverse one-way valve 48, and the heating oil pipe in sequence to form a loop. The hydraulic oil circulates and heats the hydraulic oil in the oil tank.

[0101] When returning oil: open the stop valve 49, and the hydraulic oil in the external oil outlet pipe 52 flows back to the oil tank through the stop valve 49 and the oil return pipeline 39.

Claims

1. A manual hydraulic power system, characterized in that: It comprises a bracket (1), an oil tank (2), a pump structure (3), an oil circuit structure (4), a gear transmission structure (5) and a crank (6); The bracket (1) comprises a main board (17), a top board (20) and a bottom board (19); the top board (20) is vertically fixedly connected to the middle of the main board (17), and the bottom board (19) is vertically fixedly connected to the bottom of the main board (17); The oil tank (2) is fixed between the top plate (20) and the bottom plate (19); The pump structure (3) comprises a bidirectional plunger pump (28) fixed to the front surface of the main board (17); The gear transmission structure (5) comprises a driving gear (23) arranged on the rear surface of the main board (17) and a driven gear (24) meshing with the driving gear (23); the driven gear is coaxially fixedly connected to the power end of the bidirectional plunger pump (28); the crank handle (6) is coaxially fixedly connected to the driving gear (23); The gear transmission structure (5) further comprises a cantilever shaft (21) and a cantilever shaft seat (22); The cantilever shaft (21) is rotatably connected to a cantilever shaft seat (22), and the cantilever shaft seat (22) is fixedly connected to the front surface of the main board (17); the cantilever shaft (21) passes through the main board (17) and is coaxially fixedly connected to the driving gear (23), and the end of the cantilever shaft (21) is connected to a crank (6); The crank handle (6) comprises a fixed head (25), a rocker arm (26) and a foldable handle (27); One end of the rocker arm (26) is fixedly connected to a fixed head (25), the fixed head (25) is fixedly connected to the end of the cantilever shaft (21), and the other end of the rocker arm (26) is connected to a folding handle (27); The oil circuit structure (4) is arranged between the oil tank (2) and the pump structure (3); The oil circuit structure (4) comprises an oil suction pipeline (35), an oil outlet pipeline (36), an oil drain pipe (37), a heating pipeline (38) and an oil return pipeline (39); The oil suction pipeline (35) comprises an inner oil suction pipe (40) and an outer oil suction pipe (42) located inside the oil tank (2); One end of the inner oil suction pipe (40) is located inside the oil tank (2), and the other end passes through the oil tank (2) and is connected to one end of the outer oil suction pipe (42); The other end of the external oil suction pipe (42) is fixedly connected to a bidirectional plunger pump (28); The oil outlet pipeline (36) comprises an oil pump pipe (43), an oil pump check valve (44), an external oil outlet pipe (45), a pipe valve bracket (46) and a pressure gauge (47); One end of the oil pump pipe (43) is fixedly connected to the bidirectional plunger pump (28), and the other end is connected to the external oil outlet pipe (45) via the oil pump check valve (44); the oil pump check valve (44) is fixed to a pipe valve bracket (46), and the pipe valve bracket (46) is fixedly connected to the upper surface of the main board (17) of the bracket (1); a pressure gauge (47) is fixed to the pipe valve bracket (46), and the pressure gauge (47) is connected to the oil pump check valve (44); One end of the oil drain pipe (37) is connected to the oil tank (2), and the other end is connected to the bidirectional plunger pump (28); The heating pipeline (38) comprises a reverse check valve (48) fixedly connected to a pipe valve bracket (46) and a heating oil pipe; One end of the reverse check valve (48) is fixedly connected to the pump oil pipe (43), and the other end is fixedly connected to one end of the heating oil pipe; the other end of the heating oil pipe extends into the oil tank (2), is coiled, and then extends out of the oil tank (2), and is fixedly connected to one end of the external oil suction pipe (42); The oil return pipeline (39) comprises an oil return pipe and a stop valve (49) fixedly connected to a pipe valve bracket (46); the oil return pipe is connected to an external oil outlet pipe (45) via the stop valve (49), and the other end of the oil return pipe extends into the oil tank (2); The bidirectional plunger pump (28) is provided with an oil suction hinged joint (30), an oil pumping hinged joint (31) and an oil drain joint (32); The oil suction hinged joint (30) is connected to an external oil suction pipe (42); The oil pump hinged joint (31) is connected to the oil pump pipe (43); The oil drain joint (32) is connected to the oil drain pipe (37).

2. A manual hydraulic power system according to claim 1, characterized in that: It also includes a breathable oil dipstick (7) disposed on the oil tank (2), the breathable oil dipstick (7) comprising a gland (71), a waterproof breathable membrane (72), a sleeve column (73), an oil dipstick (74) and a sponge ring (77); The sleeve column (73) is a hollow structure, the gland (71) is located inside the top end of the sleeve column (73) and the two are interference fit; a side cavity is formed between the side of the gland (71) and the sleeve column (73); a sponge ring (77) is placed inside the side cavity; a waterproof breathable membrane (72) is provided on the end surface of the lower end of the gland (71) that contacts the sleeve column (73); the waterproof breathable membrane (72) divides the hollow structure of the sleeve column (73) into a gland chamber and a sleeve column chamber; The side surface of the gland (71) is provided with a plurality of small holes along the circumferential direction, so that the side cavity and the gland chamber are in communication; The side of the sleeve (73) is provided with a plurality of small holes for connecting the side cavity with the external environment and the sleeve chamber with the external environment; The center of the bottom of the sleeve column (73) is connected to an oil dipstick (74) via a thread; The outer circle of the bottom of the sleeve column (73) is connected to the oil tank (2) via threads.

3. A manual hydraulic power system according to claim 2, characterized in that: The oil tank (2) comprises an oil tank body (11), and an oil drain valve (10), a breathable oil dipstick seat (12), a hot oil pipe outlet seat (13), an oil suction pipe seat (14), a hot oil pipe inlet seat (15) and an oil return pipe seat (16) arranged on the oil tank body (11); The oil tank body (11) is a hollow structure and is located between the top plate (20) and the bottom plate (19); the oil drain valve (10) is fixedly connected to the bottom of the outer side surface of the oil tank body (11); An oil filter (41) is fixed on the oil suction pipe seat (14) and the hot oil pipe outlet seat (13); The hot oil pipe outlet seat (13) is used for the hot oil pipe to extend out from the oil tank body (11); The oil suction pipe seat (14) is connected to an inner oil suction pipe (40); The hot oil pipe inlet seat (15) is used for the hot oil pipe to extend into the oil tank body (11); The oil return pipe seat (16) is used for the oil return pipe to extend into the oil tank body (11); The oil filter (41) is fixedly connected to an external oil suction pipe (42), an oil drain pipe (37), and a heating oil pipe; The outer circle of the bottom of the sleeve column (73) is connected to the breathable oil dipstick seat (12) via threads, and a rubber pad (76) is provided between the breathable oil dipstick seat (12) and the shoulder ring structure on the outer circle of the sleeve column (73).

4. A manual hydraulic power system according to claim 2 or 3, characterized in that: The bidirectional piston pump (28) is fixed to the front surface of the main board (17) and passes through the main board (17) to connect to the driven gear (24); a cushion block (29) is provided between the bidirectional piston pump (28) and the main board (17).

5. A manual hydraulic power system according to claim 2, characterized in that: The oil dipstick (74) is provided with two high liquid level holes and two low liquid level holes; the oil dipstick (74) is also provided with scale lines.

6. A manual hydraulic power system according to claim 5, characterized in that: It also includes a housing (9) arranged on the front surface of the main board (17) and a gear protection housing (8) arranged on the rear surface of the main board (17); The housing (9) is located above the top plate (20) and is used to protect the pump structure (3) and the oil circuit structure (4); it comprises a housing body (33), on which a movable cover plate (34) is provided; the oil outlets of the pressure gauge (47) and the external oil outlet pipe (45) are both located outside the housing body (33); The gear protection shell (8) is used to protect the driving gear (23) and the driven gear (24); the crank (6) is located outside the gear protection shell (8).

7. A manual hydraulic power system according to claim 1, characterized in that: The support (1) further comprises an auxiliary support (18); One end of the auxiliary bracket (18) is connected to the bottom plate (19), and the other end is connected to the top plate (20); The bottom plate (19) is provided with a fixing hole for fixing the bracket (1).

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