Hydraulic manual-electric integrated pump for overturning cab

Abstract

A first mounting cavity, a second mounting cavity, a manual oil suction channel, an electric oil suction channel, a working port A and a working port B are formed in a valve block, a valve sleeve is mounted in the first mounting cavity, a first oil channel communicates with an oil tank through the manual oil suction channel, the first oil channel communicates with a second oil channel, and the second oil channel communicates with a second oil channel; a first check valve is arranged in the first oil channel, a manual pump assembly is arranged on the valve block, the electric oil suction channel is communicated with the second oil channel through a third oil channel, the motor pump assembly can drive oil in the oil tank to be pumped to the second oil channel through the electric oil suction channel and the third oil channel, a second check valve is arranged in the third oil channel, and a distribution shaft is arranged in the second installation cavity. The distribution shaft is provided with a first distribution oil channel and a second distribution oil channel which are arranged in an isolated mode, the second distribution oil channel is communicated with the working port A and the working port B in a switching mode through the distribution shaft, a throttling block is arranged in the second distribution oil channel, throttling holes are formed in the throttling block, and through the arrangement, the integration level and safety are higher.

Description

Technical Field

[0001] The invention relates to the technical field of manual combined pumps, and in particular to a cab flipping hydraulic hand-electric integrated pump. Background Art

[0002] At present, in the field of new energy commercial heavy-duty trucks, the cab flipping requires the product to have the characteristics of small size, light weight, large-capacity oil box, low cost, safety and reliability. The manual combination pump is one of the important components of the heavy-duty truck cab. For example, a highly integrated flashlight pump is disclosed in a Chinese patent (application publication number CN115573877A). However, the oil circuit of the flashlight combination pump is complicated, the processing is inconvenient, there are many oil leakage points, and the volume is large. In addition, the oil return speed is too fast during the rotation process (resetting process) of the flipping cab. In addition, under the action of the cab's own gravity when rotating, it is easy to cause the cab to drop suddenly, which can easily cause a safety hazard to the driver, so it needs to be improved. Summary of the invention

[0003] The object of the present invention is to provide a cab tilting hydraulic hand-electric integrated pump, which has higher integration, smaller volume, lighter weight, lower cost and higher safety.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: a cab flip hydraulic hand-electric integrated pump, comprising a valve block and an oil tank and a motor pump assembly arranged on both sides of the valve block, the valve block is provided with a first installation cavity, a second installation cavity, a manual oil suction channel, an electric oil suction channel, a first oil channel, a second oil channel, a third oil channel, a working port A and a working port B, a valve sleeve is fixedly installed in the first installation cavity, one end of the first oil channel is connected to the oil tank through the manual oil suction channel, the other end of the first oil channel is connected to the second oil channel, a first check valve is arranged in the first oil channel, a manual pump assembly for pumping the oil in the manual oil suction channel into the second oil channel is arranged on the valve block, and the electric oil suction channel is connected to the third The oil channel is connected with the second oil channel, and the motor pump assembly can drive the oil in the oil tank to be pumped to the second oil channel through the electric oil suction channel and the third oil channel. A second check valve is provided in the third oil channel, and a distribution shaft is provided in the second installation cavity. The distribution shaft is provided with a first distribution oil channel and a second distribution oil channel which are isolated from each other. The second oil channel is connected to the working port A and the working port B through the distribution shaft switching. When the second oil channel is connected to the working port A through the first distribution oil channel, the working port B is connected to the oil tank through the second distribution oil channel; when the second oil channel is connected to the working port B through the first distribution oil channel, the working port A is connected to the oil tank through the second distribution oil channel. A throttling block is provided in the second distribution oil channel, and a throttling hole is provided on the throttling block.

[0005] Furthermore, the manual pump assembly includes a valve stem slidably arranged on the valve sleeve, a manual valve rotatably connected to the valve stem, and a connecting rod rotatably connected to the manual valve, the other end of the connecting rod is rotatably connected to the valve block, and first sealing members are respectively provided on both sides of the valve sleeve for sealing with the valve stem.

[0006] Further, the valve sleeve includes a first sleeve portion and a second sleeve portion, the first sleeve portion and the second sleeve portion are axially detachably fixedly connected as a whole, the second sleeve portion is provided with a valve cavity for accommodating the valve stem, the first oil channel includes an oil channel a and an oil channel b arranged in the first sleeve portion, one end of the oil channel a is connected to the manual oil suction channel, the other end of the oil channel a is connected to the valve cavity adjacent to one side of the first sleeve portion, one end of the oil channel b is connected to the valve cavity adjacent to the first sleeve portion, and the other end of the oil channel b is connected to the second oil channel.

[0007] Furthermore, a first check valve is respectively provided in the oil passage a and the oil passage b. When the manual valve drives the valve stem to rise, the oil in the oil tank is guided to the first check valve in the oil passage a to allow the oil to enter the valve chamber. When the manual valve drives the valve stem to descend, the first check valve in the oil passage a and the oil pressure in the valve chamber are guided to the first check valve in the oil passage b to allow the oil to enter the second oil passage.

[0008] Furthermore, an annular gap is provided between the valve sleeve and the first installation cavity, and second sealing members are provided on both sides of the first installation cavity corresponding to the annular gap, respectively, and the oil passage b and the second oil passage are connected through the annular gap.

[0009] Furthermore, a fourth oil channel is provided in the valve block, one end of the fourth oil channel is connected to the working port B, the other end of the fourth oil channel is arranged on the other side of the working port A and corresponds to the working port A, and the first end of the second distribution oil channel and the second end of the first distribution oil channel are located on both sides of the same circumferential surface.

[0010] Furthermore, the first distribution oil passage is obliquely arranged in the distribution shaft, and the distribution shaft is provided with an annular cavity connected with the first distribution oil passage, and the annular cavity is arranged at a position of the distribution shaft adjacent to the second oil passage.

[0011] Furthermore, the valve block is provided with an annular groove at a position corresponding to the outer periphery of the distribution shaft, and an emptying channel is provided in the valve block, one end of the emptying channel is connected to the oil tank, and the other end of the emptying channel is connected to the annular groove, and a rubber part is provided in the annular groove, and the rubber part is suspended in the annular groove to allow air to enter and exit the annular groove and to block the oil channel at the same time.

[0012] Furthermore, an arc-shaped limiting groove is arranged on the outer circumference of the distribution shaft, and a limiting rod is arranged in the valve block, and the limiting rod extends into the arc-shaped limiting groove, and the rotation angle of the distribution shaft is limited by the cooperation of the limiting rod and the arc-shaped limiting groove.

[0013] Furthermore, an oil pumping device is provided in the oil tank, the output end of the motor pump assembly is connected to the oil pumping device via a connecting shaft, a through hole for the connecting shaft to pass through is provided in the valve block, and the oil pumping device is driven to rotate by the motor pump assembly to realize electric oil pumping.

[0014] In summary, the present invention has the following beneficial effects: 1. The present invention greatly simplifies the oil circuit structure by designing the oil circuit of the valve block, making the structure of the flashlight integrated pump more compact, and solving the problem of many oil leakage points and inconvenient processing of the flashlight integrated pump; 2. The present invention arranges a throttling block at the second oil distribution channel, which can effectively reduce the speed at which the oil in the lower chamber of the oil cylinder flows to the oil tank, thereby ensuring that the problem of potential safety hazards to the driver caused by the sudden descent of the cab is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a front view of the present invention.

[0017] Figure 3 It is a schematic diagram of the installation structure of the connecting shaft of the present invention.

[0018] Figure 4 It is a cross-sectional view of the valve block of the present invention.

[0019] Figure 5 The present invention Figure 4 Enlarged view of point B.

[0020] Figure 6 The present invention Figure 4 Sectional view at point A.

[0021] Figure 7 It is a structural schematic diagram of the distribution shaft of the present invention.

[0022] Figure 8 It is a diagram of the working principle of the oil circuit of the present invention.

[0023] In the figure: 10, valve block; 11, first installation cavity; 12, second installation cavity; 121, drain channel; 122, ring groove; 123, rubber part; 13, manual oil suction channel; 14, electric oil suction channel; 15, first oil channel; 151, first check valve; 16, second oil channel; 17, third oil channel; 171, second check valve; 18, working port A; 19, working port B; 191, fourth oil channel; 20, oil tank; 21, oil pumping device; 30, motor pump assembly; 31, connecting Connecting shaft; 40, valve sleeve; 41, first sleeve; 411, oil channel a; 412, oil channel b; 42, second sleeve; 421, valve chamber; 43, annular gap; 50, manual pump assembly; 51, valve stem; 52, manual valve; 53, connecting rod; 60, distribution shaft; 61, first distribution oil channel; 62, second distribution oil channel; 63, annular chamber; 64, arc-shaped limit groove; 65, handle; 66, filter; 70, throttle block; 71, throttle hole; 80, limit rod; 90, switch assembly. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-Figure 8 As shown, a cab flipping hydraulic hand-electric integrated pump includes a valve block 10 and an oil tank 20 and a motor pump assembly 30 sealed on both sides of the valve block 10. A switch component 90 for controlling the opening and closing of the motor pump assembly 30 is installed on the valve block 10. The above constitutes the basic structure of the present invention.

[0026] The valve block 10 is provided with a first installation cavity 11, a second installation cavity 12, a manual oil suction channel 13, an electric oil suction channel 14, a first oil channel 15, a second oil channel 16, a third oil channel 17, a working port A18 and a working port B19, wherein the working port A18 is used to connect to the lower cavity of the oil cylinder (not shown in the figure), and the working port B19 is used to connect to the upper cavity of the oil cylinder. A valve sleeve 40 is fixedly installed in the first installation cavity 11, one end of the first oil channel 15 is connected to the oil tank 20 through the manual oil suction channel 13, and the other end of the first oil channel 15 is connected to the second oil channel 16. A first check valve 15 is provided in the first oil channel 15. 1. A manual pump assembly 50 is provided on the valve block 10 for pumping the oil in the manual oil suction channel 13 into the second oil channel 16. The electric oil suction channel 14 is connected to the second oil channel 16 through the third oil channel 17. The motor pump assembly 30 can drive the oil in the oil tank 20 to be pumped to the second oil channel 16 through the electric oil suction channel 14 and the third oil channel 17. A second check valve 171 is provided in the third oil channel 17. Both the first check valve 151 and the second check valve 171 are press-in check valves. The purpose of the second check valve 171 is to prevent the oil in the third oil channel 17 from flowing back to the electric oil suction channel 14.

[0027] A distribution shaft 60 is provided in the second installation cavity 12, and a handle 65 is provided at the outer end of the distribution shaft 60. The distribution shaft 60 is provided with a first distribution oil passage 61 and a second distribution oil passage 62 which are isolated from each other. The second oil passage 16 is switched to connect the working port A18 and the working port B19 through the distribution shaft 60. When the second oil passage 16 is connected to the working port A18 through the first distribution oil passage 61, the working port B19 is connected to the oil tank 20 through the second distribution oil passage 62; when the second oil passage 16 is connected to the working port B19 through the first distribution oil passage 61, the working port A18 is connected to the oil tank 20 through the second distribution oil passage 62. A throttling block 70 is provided in the second distribution oil passage 62, and a throttling hole 71 is provided on the throttling block 70. Specifically, a filter plate 66 is also provided in the second distribution shaft 60.

[0028] The manual pump assembly 50 includes a valve stem 51 slidably arranged on the valve sleeve 40, a manual valve 52 rotatably connected to the valve stem 51, and a connecting rod 53 rotatably connected to the manual valve 52. The other end of the connecting rod 53 is rotatably connected to the valve block 10. Both sides of the valve sleeve 40 are respectively provided with first sealing members sealed with the valve stem 51. The manual valve 52 is swung back and forth to achieve the purpose of manual oil pumping. The manual valve 52 is rotatably connected to the valve block 10 through the connecting rod 53, so that the manual valve 52, the connecting rod 53, and the valve stem 51 form a connecting rod 53 mechanism, so that the manual valve 52 is more labor-saving when manually pumping oil.

[0029] The valve sleeve 40 includes a first sleeve portion 41 and a second sleeve portion 42, and the first sleeve portion 41 and the second sleeve portion 42 are detachably fixedly connected as a whole along the axial direction. Specifically, the first sleeve portion 41 is provided with a cavity for the second sleeve portion 42 to partially extend into, and the inner wall of the cavity is provided with an internal thread, and the portion where the second sleeve portion 42 extends into the cavity is provided with an external thread. The first sleeve portion 41 and the second sleeve portion 42 are threadedly connected as a whole, and a sealing ring is provided between the first sleeve portion 41 and the second sleeve portion 42. The second sleeve portion 42 is provided with a valve cavity 421 for accommodating the valve stem 51. The first oil passage 15 includes an oil passage a411 and an oil passage b412 provided in the first sleeve portion 41, one end of the oil passage a411 is connected to the manual oil suction passage 13, and the other end of the oil passage a411 is connected to the valve cavity 421 adjacent to one side of the first sleeve portion 41, one end of the oil passage b412 is connected to the valve cavity 421 adjacent to the first sleeve portion 41, and the other end of the oil passage b412 is connected to the second oil passage 16.

[0030] The oil passage a411 and the oil passage b412 are respectively provided with a first check valve 151. When the manual valve 52 drives the valve stem 51 to rise, the oil in the oil tank 20 is guided to the first check valve 151 in the oil passage a411, so that the oil enters the valve chamber 421. When the manual valve 52 drives the valve stem 51 to descend, the first check valve 151 in the oil passage a411 and the oil pressure in the valve chamber 421 are guided to the first check valve 151 in the oil passage b412, so that the oil enters the second oil passage 16. The first check valve 151 in the oil passage a411 prevents the oil in the valve chamber 421 from flowing back to the oil passage a411, and the first check valve 151 in the oil passage b412 prevents the oil in the second oil passage 16 from flowing back to the oil passage b412.

[0031] An annular gap 43 is provided between the valve sleeve 40 and the first installation cavity 11 . Second sealing members are provided on both sides of the first installation cavity 11 corresponding to the annular gap 43 . The oil passage b412 and the second oil passage 16 are connected via the annular gap 43 .

[0032] A fourth oil passage 191 is provided in the valve block 10, one end of the fourth oil passage 191 is connected to the working port B19, the other end of the fourth oil passage 191 is arranged on the other side of the working port A18 and corresponds to the working port A18, the first end of the second distribution oil passage 62 and the second end of the first distribution oil passage 61 are located on both sides of the same circumferential surface, when the distribution shaft 60 rotates to the first position, the second oil passage 16 is connected to the working port A18 through the first distribution oil passage 61, and at this time the working port B19 is connected to the fourth oil passage 191, the second distribution flow channel and the oil tank 20 in sequence.

[0033] The first oil distribution passage 61 is obliquely disposed in the distribution shaft 60 . The distribution shaft 60 is provided with an annular cavity 63 communicating with the first oil distribution passage 61 . The annular cavity 63 is disposed at a position of the distribution shaft 60 adjacent to the second oil passage 16 .

[0034] The valve block 10 is provided with an annular groove 122 at a position corresponding to the outer periphery of the distribution shaft 60, and the valve block 10 is provided with an emptying channel 121, one end of the emptying channel 121 is communicated with the oil tank 20, and the other end of the emptying channel 121 is communicated with the annular groove 122, and a rubber member 123 is provided in the annular groove 122, and the rubber member 123 is suspended in the annular groove 122 to allow air to enter and exit the annular groove 122, and at the same time can block the oil channel, when the oil is manually or electrically pumped, the hydraulic oil in the oil tank 20 is reduced, and the pressure in the oil tank 20 is relatively small at this time, and the atmospheric pressure will enter the oil tank 20 through the suspended rubber member 123, thereby maintaining the pressure balance of the oil tank 20, and when the oil in the cylinder flows back to the oil tank 20, the oil pressure in the oil tank 20 increases, and at this time the air in the oil tank 20 will be discharged to the outside of the oil tank 20 through the suspended rubber member 123.

[0035] An arc-shaped limit groove 64 is arranged on the outer periphery of the distribution shaft 60, and a limit rod 80 is arranged in the valve block 10. The limit rod 80 extends into the arc-shaped limit groove 64. The rotation angle of the distribution shaft 60 is limited by the cooperation between the limit rod 80 and the arc-shaped limit groove 64. In the present invention, the limit rod 80 can rotate in the arc-shaped limit groove 64 to an angle of 180°.

[0036] The oil tank 20 is provided with an oil pumping device 21, and the output end of the motor pump assembly 30 is connected to the oil pumping device 21 via a connecting shaft 31. A through hole for the connecting shaft 31 to pass through is provided in the valve block 10. The motor pump assembly 30 drives the oil pumping device 21 to rotate, thereby realizing electric oil pumping.

[0037] The working principle of manual oil pumping of the present invention is as follows: when the distribution shaft 60 rotates to the first position, the second oil channel 16 is connected to the working port A18 through the first distribution oil channel 61, and the working port B19 is connected to the fourth oil channel 191, the second distribution channel and the oil tank 20 in sequence. At this time, the working port A18 is connected to the second oil channel 16, and the working port B19 is connected to the oil tank 20. When the manual oil pumping is performed by the manual pump assembly 50, the hydraulic oil in the oil tank 20 enters the working port A18 through the manual oil suction channel 13, the oil channel a411, the valve cavity 421, the oil channel b412, the annular gap 43, the second oil channel 16, and the first distribution oil channel 61. That is to say, at this time, the hydraulic oil enters the lower chamber of the oil cylinder. At the same time, the hydraulic oil in the upper chamber of the oil cylinder enters the oil tank 20 through the working port B19, the fourth oil channel 191, the second distribution oil channel 62, and the throttle hole 71. Box 20, at this time, the cylinder extends forward; when the distribution shaft 60 rotates to the second position, the second oil channel 16 is connected with the working port B19 through the first distribution oil channel 61, and the working port A18 is connected with the oil tank 20 through the second distribution flow channel. At this time, the working port B19 is connected with the second oil channel 16, and the working port A18 is connected with the oil tank 20. When the manual oil is pumped by the manual pump assembly 50, the hydraulic oil in the oil tank 20 enters the working port B19 through the manual oil suction channel 13, the oil channel a411, the valve cavity 421, the oil channel b412, the annular gap 43, the second oil channel 16, and the first distribution oil channel 61. That is to say, at this time, the hydraulic oil enters the upper chamber of the oil cylinder. At the same time, the hydraulic oil in the lower chamber of the oil cylinder enters the oil tank 20 through the working port A18, the second distribution oil channel 62, and the throttle hole 71. At this time, the cylinder retracts backward to its initial state.

[0038] The working principle of the electric oil pumping of the present invention is as follows: when the distribution shaft 60 rotates to the first position, the second oil passage 16 is connected to the working port A18 through the first distribution oil passage 61, and the working port B19 is connected to the fourth oil passage 191, the second distribution flow passage and the oil tank 20 in sequence. At this time, the working port A18 is connected to the second oil passage 16, and the working port B19 is connected to the oil tank 20. When the electric oil pump is performed through the motor pump assembly 30, the hydraulic oil in the oil tank 20 enters the working port A18 through the electric oil suction channel 14, the third oil passage 17, the second oil passage 16, and the first distribution oil passage 61. That is to say, at this time, the hydraulic oil enters the lower chamber of the oil cylinder. At the same time, the hydraulic oil in the upper chamber of the oil cylinder enters the oil tank 20 through the working port B19, the fourth oil passage 191, the second distribution oil passage 62, and the throttle hole 71. Box 20, at this time, the cylinder extends forward; when the distribution shaft 60 rotates to the second position, the second oil channel 16 is connected with the working port B19 through the first distribution oil channel 61, and the working port A18 is connected with the oil tank 20 through the second distribution channel. At this time, the working port B19 is connected with the second oil channel 16, and the working port A18 is connected with the oil tank 20. When the motor pump assembly 30 is used for electric oil pumping, the hydraulic oil in the oil tank 20 enters the working port B19 through the electric oil suction channel 14, the third oil channel 17, the second oil channel 16, and the first distribution oil channel 61. That is to say, at this time, the hydraulic oil enters the upper chamber of the oil cylinder. At the same time, the hydraulic oil in the lower chamber of the oil cylinder enters the oil tank 20 through the working port A18, the second distribution oil channel 62, and the throttle hole 71. At this time, the cylinder retracts backward to its initial state.

[0039] In summary, the present invention has the following beneficial effects: 1. The present invention greatly simplifies the oil circuit structure by designing the oil circuit of the valve block 10, making the structure of the flashlight integrated pump more compact, and solving the problem of many oil leakage points and inconvenient processing of the flashlight integrated pump; 2. The present invention provides a throttle block 70 at the second oil distribution passage 62, which can effectively reduce the speed at which the oil in the lower chamber of the oil cylinder flows to the oil tank 20, thereby ensuring that the problem of potential safety hazards to the driver caused by the sudden descent of the cab is solved.

[0040] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A cab tilting hydraulic hand-electric integrated pump, characterized in that: The invention comprises a valve block (10), an oil tank (20) and a motor pump assembly (30) arranged on both sides of the valve block (10); the valve block (10) is provided with a first installation cavity (11), a second installation cavity (12), a manual oil suction passage (13), an electric oil suction passage (14), a first oil passage (15), a second oil passage (16), a third oil passage (17), a working port A (18) and a working port B (19); a valve sleeve (40) is fixedly installed in the first installation cavity (11); and the first oil passage ( One end of the first oil passage (15) is connected to the oil tank (20) through the manual oil suction passage (13), the other end of the first oil passage (15) is connected to the second oil passage (16), a first check valve (151) is provided in the first oil passage (15), a manual pump assembly (50) is provided on the valve block (10) for pumping the oil in the manual oil suction passage (13) into the second oil passage (16), the electric oil suction passage (14) is connected to the second oil passage (16) through the third oil passage (17), and the motor pump assembly (30) is capable of driving the motor pump assembly (30) to drive ... The oil in the oil tank (20) is pumped to the second oil passage (16) through the electric oil suction passage (14) and the third oil passage (17); a second check valve (171) is provided in the third oil passage (17); a distribution shaft (60) is provided in the second installation cavity (12); the distribution shaft (60) is provided with a first distribution oil passage (61) and a second distribution oil passage (62) which are isolated from each other; a throttling block (70) is provided in the second distribution oil passage (62); a throttling hole (71) is provided on the throttling block (70); The second oil passage (16) is switched to connect the working port A (18) and the working port B (19) through the distribution shaft (60); when the second oil passage (16) is connected to the working port A (18) through the first distribution oil passage (61), the working port B (19) is connected to the oil tank (20) through the second distribution oil passage (62); when the second oil passage (16) is connected to the working port B (19) through the first distribution oil passage (61), the working port A (18) is connected to the oil tank (20) through the second distribution oil passage (62).

2. The cab tilting hydraulic hand-electric integrated pump according to claim 1, characterized in that: The manual pump assembly (50) comprises a valve stem (51) slidably arranged on the valve sleeve (40), a manual valve (52) rotatably connected to the valve stem (51), and a connecting rod (53) rotatably connected to the manual valve (52), the other end of the connecting rod (53) being rotatably connected to the valve block (10), and first sealing members which are sealed with the valve stem (51) are respectively provided on both sides of the valve sleeve (40).

3. The cab tilting hydraulic hand-electric integrated pump according to claim 2, characterized in that: The valve sleeve (40) comprises a first sleeve portion (41) and a second sleeve portion (42), the first sleeve portion (41) and the second sleeve portion (42) are detachably fixedly connected to form a whole along the axial direction, the second sleeve portion (42) is provided with a valve cavity (421) for accommodating a valve stem (51), the first oil passage (15) comprises an oil passage a (411) and an oil passage b (412) arranged in the first sleeve portion (41), one end of the oil passage a (411) is connected to the manual oil suction passage (13), the other end of the oil passage a (411) is connected to the valve cavity (421) adjacent to one side of the first sleeve portion (41), one end of the oil passage b (412) is connected to the valve cavity (421) adjacent to the first sleeve portion (41), and the other end of the oil passage b (412) is connected to the second oil passage (16).

4. The cab tilting hydraulic hand-electric integrated pump according to claim 3, characterized in that: The oil passage a (411) and the oil passage b (412) are respectively provided with a first check valve (151). When the manual valve (52) drives the valve stem (51) to rise, the oil in the oil tank (20) is conducted to the first check valve (151) in the oil passage a (411), so that the oil enters the valve chamber (421). When the manual valve (52) drives the valve stem (51) to descend, the first check valve (151) in the oil passage a (411) and the oil pressure in the valve chamber (421) are conducted to the first check valve (151) in the oil passage b (412), so that the oil enters the second oil passage (16).

5. The cab tilting hydraulic hand-electric integrated pump according to claim 4, characterized in that: An annular gap (43) is provided between the valve sleeve (40) and the first installation cavity (11), and second sealing members are provided on both sides of the first installation cavity (11) corresponding to the annular gap (43), respectively, and the oil passage b (412) and the second oil passage (16) are connected via the annular gap (43).

6. The cab tilting hydraulic hand-electric integrated pump according to claim 1, characterized in that: A fourth oil passage (191) is provided in the valve block (10), one end of the fourth oil passage (191) is connected to the working port B (19), the other end of the fourth oil passage (191) is arranged on the other side of the working port A (18) and is arranged corresponding to the working port A (18), and the first end of the second distribution oil passage (62) and the second end of the first distribution oil passage (61) are located on both sides of the same circumferential surface.

7. The cab tilting hydraulic hand-electric integrated pump according to claim 6, characterized in that: The first distribution oil passage (61) is obliquely arranged in the distribution shaft, and the distribution shaft (60) is provided with an annular cavity (63) connected to the first distribution oil passage (61), and the annular cavity (63) is arranged at a position of the distribution shaft (60) adjacent to the second oil passage (16).

8. The cab tilting hydraulic hand-electric integrated pump according to claim 6, characterized in that: The valve block (10) is provided with an annular groove (122) at a position corresponding to the outer periphery of the distribution shaft (60), and an emptying channel (121) is provided in the valve block (10). One end of the emptying channel (121) is communicated with the oil tank (20), and the other end of the emptying channel (121) is communicated with the annular groove (122). A rubber part (123) is provided in the annular groove (122). The rubber part (123) is suspended in the annular groove (122) so that air can enter and exit the annular groove (122) and can block the oil channel at the same time.

9. The cab tilting hydraulic hand-electric integrated pump according to claim 1, characterized in that: The distribution shaft (604) is provided with an arc-shaped limit groove (64) on its outer periphery, and the valve block (10) is provided with a limit rod (80), which extends into the arc-shaped limit groove (64), and the rotation angle of the distribution shaft (60) is limited by the cooperation of the limit rod (80) and the arc-shaped limit groove (64).

10. A cab tilting hydraulic hand-electric integrated pump according to any one of claims 1 to 9, characterized in that: An oil pumping device (21) is provided in the oil tank (20); an output end of the motor pump assembly (30) is connected to the oil pumping device (21) via a connecting shaft (31); a through hole for the connecting shaft (31) to pass through is provided in the valve block (10); the motor pump assembly (30) drives the oil pumping device (21) to rotate, thereby realizing electric oil pumping.

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