A cab flip flashlight combination pump with double plunger manual function

Abstract

The present invention discloses a cab tilting flashlight combination pump with a double-plunger manual function, comprising a valve seat, a fuel tank and a motor pump assembly, wherein a first valve cavity, a second valve cavity, an oil channel a, an oil channel b and an oil channel c are provided in the valve seat, and the motor pump assembly is connected to the oil channel a through the oil channel c, the first valve cavity is provided with two groups, a manual valve core is provided in the first valve cavity, an operating rod a that drives the two groups of manual valve cores to slide back and forth is provided on the valve seat, a distribution valve core is provided in the second valve cavity, the valve seat is provided with an operating rod b that drives the distribution valve core to reverse, the oil channel a connects the two groups of first valve cavities and the second valve cavity, the oil channel b connects the oil tank and the oil channel a, a one-way ball is provided at the position of the oil channel a corresponding to the two groups of first valve cavities to separate the oil channel a and the oil channel b, an oil channel d that connects the oil tank and the inner cavity of the motor pump assembly is provided in the valve seat, the distribution valve core is provided with an oil return channel connected to the oil tank, and the valve seat is provided with a working port A and a working port B that are connected to the second valve cavity. Through the above arrangement, the user's operation convenience is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of manual combination pumps, in particular to a cab flip flashlight combination pump with a double-plunger manual function. Background Art

[0002] Currently, in the field of new energy commercial heavy-duty trucks, cab flipping requires products with small size, light weight, large-capacity oil tank, low cost, safety and reliability. Manual combination pumps are one of the important components of heavy-duty truck cabs. For example, a highly integrated flashlight pump is disclosed in a Chinese patent (application publication number CN115573877A). However, the flashlight combination pump has a complex oil circuit, is inconvenient to manufacture, has many oil leakage points, and is large in size.

[0003] To this end, technicians have designed a cab flip flashlight combined pump assembly (patent publication number CN116538081A), which includes a valve seat, a fuel tank and a motor pump assembly. The valve seat is provided with a first valve chamber, a second valve chamber, an oil channel a, an oil channel b and an oil channel c. The first valve chamber is provided with a manual valve core, the valve seat is provided with an operating rod a, the second valve chamber is provided with a distribution valve core, the valve seat is provided with an operating rod b, the oil channel a connects the first valve chamber and the second valve chamber, the oil channel b connects the oil channel a and the fuel tank, and the oil channel a is provided with a partition oil channel a. And the one-way ball of oil channel b, the valve seat is provided with oil channel d connecting the oil tank and the motor pump assembly, the distribution valve core includes a distribution valve core, the distribution valve core is provided with a central cavity and an outer ring groove, and is connected to the return oil channel and the oil tank through the oil channel c, the valve seat is provided with a working port A and a working port B, the distribution valve core is provided with a channel port, the distribution valve core is provided with a one-way valve structure for preventing the hydraulic oil in the central cavity from flowing back to the oil channel a, and the valve seat is provided with an overflow port. Through the setting, the volume of the combined pump assembly is reduced, and the problem of many leakage points is solved at the same time.

[0004] However, the manual pump of the manual combination pump has a small displacement, and the user needs to operate the operating lever of the manual pump for a long time when manually pumping oil, which makes it inconvenient to use. Therefore, it needs to be improved. Summary of the Invention

[0005] The purpose of the present invention is to provide a cab flip flashlight combination pump with a double-plunger manual function. By providing a double manual valve core and improving the oil circuit system of the valve seat, the displacement of the manual combination pump of the present invention is increased to twice the original when the user operates the operating lever a single time, thereby effectively improving the user's operating convenience.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a cab flip flashlight combination pump with a double-plunger manual function, including a valve seat and an oil tank and a motor pump assembly arranged on the valve seat, the valve seat is provided with a first valve chamber, a second valve chamber, an oil channel a, an oil channel b and an oil channel c, the motor pump assembly is connected to the oil channel a through the oil channel c, when the motor pump assembly is driven, the oil channel a is converted into an oil suction state, the first valve chamber is provided with two groups, a manual valve core is provided in the first valve chamber, an operating rod a for driving the two groups of manual valve cores to slide back and forth is provided on the valve seat, a distribution valve core is provided in the second valve chamber, and an operating rod b for driving the distribution valve core to reversing is provided on the valve seat, Oil channel a connects two groups of first valve chambers and second valve chambers, oil channel b connects the oil tank and oil channel a, and one-way balls for isolating oil channel a and oil channel b are respectively provided at the positions of oil channel a corresponding to the two groups of first valve chambers. An oil channel d connecting the oil tank and the inner cavity of the motor pump assembly is provided in the valve seat, and the distribution valve core is provided with a return oil channel connecting the oil tank. The valve seat is provided with a working port A and a working port B connected to the second valve chamber. Oil channel a is switched to connect to one of the working port A and the working port B through the distribution valve core, and the other working port is switched to be isolated from oil channel a and connected to the oil tank through the return oil channel. A one-way valve structure is provided in oil channel a to prevent the oil pressure in the second valve chamber from flowing back to oil channel a.

[0007] Furthermore, the inner end of the operating rod a is connected to a driving block arranged in the oil tank, and linkage rods are respectively provided on both sides of the driving block. Limiting grooves are respectively provided on both sides of the valve seat in an arc shape with the operating rod a as the center. The limiting grooves are connected to the first valve cavity, and the linkage rods extend into the limiting grooves and are linked with the manual valve core, so that when the operating rod a rotates, the manual valve cores on both sides can be driven to slide back and forth along the corresponding first valve cavity through the driving block.

[0008] Furthermore, a central flow channel is provided in the manual valve core, and the central flow channel connects the oil tank and the oil channel a. An overflow port connected to the oil tank is provided at the central flow channel. The central flow channel is provided with a support seat a, an elastic member a and a ball head a arranged in sequence close to the oil channel a. A valve port is provided on the side of the manual valve core adjacent to the oil channel a. The elastic member a is arranged between the support seat a and the ball head a. The ball head a blocks the valve port under the action of the elastic member a. The support seat a is provided with a connecting hole a connecting the central flow channel and the oil tank. The outer periphery of the manual valve core is provided with a piston sleeve that contacts the cavity wall of the first valve cavity.

[0009] Furthermore, the oil channel a includes a first flow channel corresponding one-to-one to the first valve cavity and a second flow channel connecting the two groups of first flow channels, and the first flow channel is connected to the second valve cavity through the second flow channel.

[0010] Furthermore, the one-way valve structure is arranged in the second flow channel, and the one-way valve structure includes an elastic part b and a ball b arranged on both sides of the elastic part b. A step portion is provided on one side of the second flow channel, and a support seat b is provided on the other side of the second flow channel. The one-way valve assembly is respectively arranged between the step portion and the support seat b, and the support seat b is provided with a connecting hole b connecting the second flow channel and the first flow channel on the corresponding side.

[0011] Furthermore, the operating rod a and the operating rod b are both arranged on the bottom end surface of the valve seat, and the manual valve core and the distribution valve core are arranged vertically.

[0012] Furthermore, three internally interconnected communication holes c are provided on the outer periphery of the distribution valve core, and the communication holes c are isolated from the oil return channel. The communication ports c are respectively provided with sealing members that contact the cavity wall of the second valve cavity, and a through groove is provided in the center of the sealing member.

[0013] Furthermore, the working port A is connected to the second valve chamber through the oil passage e, and the working port B is connected to the second valve chamber through the oil passage f. When the working port A is connected to the oil passage a through the oil passage e and the connecting port c, the working port B is connected to the oil tank through the oil passage f and the return oil passage. When the working port B is connected to the oil passage a through the oil passage f and the connecting port c, the working port A is connected to the oil tank through the oil passage e and the return oil passage.

[0014] Furthermore, a notch is provided at one end of the distribution valve core extending out of the valve seat, and a limit block is detachably connected to the bottom of the valve seat. The limit block is partially inserted into the notch and cooperates with the notch to limit the depth of the distribution valve core inserted into the second valve cavity. The distribution valve core is provided with a first limit surface on both sides corresponding to the notch, and the limit block is provided with a second limit surface at the position corresponding to the first limit surface. The rotation angle of the distribution valve core is limited by the cooperation of the first limit surface and the second limit surface.

[0015] Furthermore, the operating rod a includes an inner cylindrical section and an outer nut section, a through hole for the inner cylindrical section to pass through is provided in the valve seat, a plurality of groups of self-lubricating bearings are provided from the inside to the outside of the through hole, an O-ring is provided between adjacent self-lubricating bearings, a groove with a diameter larger than the through hole is provided at the outer end of the through hole, a dust cover is provided in the groove, a dust ring is provided between the dust cover and the inner cylindrical section, and the dust ring prevents external dust from clogging the self-lubricating bearing, the inner cylindrical section and the drive block are fixedly connected by a pin, and the operating rod a is rotated through the outer nut section.

[0016] In summary, the present invention has the following beneficial effects:

[0017] The flashlight combination pump of the present invention is provided with dual manual valve cores and the oil circuit system of the valve seat is improved so that when the user operates the operating lever a once, the displacement of the manual combination pump of the present invention is increased to twice the original amount, thereby effectively improving the user's operating convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the first perspective of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the second viewing angle of the present invention.

[0020] Figure 3 It is a schematic diagram of the split structure of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the operating lever b of the present invention.

[0022] Figure 5 It is a schematic diagram of the installation structure of the operating lever a of the present invention.

[0023] Figure 6 It is a schematic diagram of the internal structure of the valve seat of the present invention.

[0024] Figure 7 The present invention Figure 6 Enlarged view of point A.

[0025] Figure 8 The present invention Figure 6 Enlarged view of point B.

[0026] Figure 9 It is a partial schematic diagram of the motor pump assembly of the present invention.

[0027] Figure 10 It is a schematic diagram of the oil circuit of the present invention.

[0028] Figure 11 It is a schematic diagram of the first limiting surface and the second limiting surface of the present invention.

[0029] Figure 12 Schematic diagram of the notch groove of the present invention.

[0030] In the figure: 10, valve seat; 11, first valve chamber; 12, second valve chamber; 13, oil channel a; 131, one-way ball; 132, one-way valve structure; 1321, elastic member b; 1322, ball b; 1323, support seat b; 133, first flow channel; 134, second flow channel; 14, oil channel b; 15, oil channel c; 16, oil channel d; 17, working port A; 18, working port B; 19, limit groove; 20, oil tank; 30, motor pump assembly; 40, manual valve core; 41, operating lever a; 411, inner cylinder section; 412, outer Nut segment; 413, self-lubricating bearing; 414, O-ring; 415, dust cover; 416, dust ring; 42, drive block; 43, linkage rod; 44, center flow channel; 45, overflow port; 46, support seat a; 47, elastic member a; 48, ball head a; 481, inverted cone block; 49, piston sleeve; 50, distribution valve core; 51, operating rod b; 52, oil return channel; 53, connecting hole c; 54, sealing member; 55, notch groove; 551, first limit surface; 56, limit block; 561, second limit surface; 60, relay. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] like Figure 1-12As shown, a cab flip flashlight combination pump with a double-plunger manual function includes a valve seat 10 and an oil tank 20 and a motor pump assembly 30 arranged on the valve seat 10. The valve seat 10 is provided with a first valve chamber 11, a second valve chamber 12, an oil passage a13, an oil passage b14 and an oil passage c15. The motor pump assembly 30 is connected to the oil passage a13 through the oil passage c15. When the motor pump assembly 30 is driven, the oil passage a13 is converted into an oil suction state. The first valve chamber 11 is provided with two groups, and a manual valve core 40 is provided in the first valve chamber 11. The valve seat 10 is provided with an operating rod a41 that drives the two groups of manual valve cores 40 to slide back and forth. Specifically, the operating rod a415 is rotatably mounted on the valve seat 10 and is connected to the valve seat. 10 is sealed together, the outer end of the operating rod a41 extends out of the valve seat 10, the inner end of the operating rod a41 is inserted into the valve seat 10 and extends into the oil tank 20, the inner end of the operating rod a41 is connected to the driving block 42 arranged in the oil tank 20, and the two sides of the driving block 42 are respectively provided with a linkage rod 43, and the two sides of the valve seat 10 are respectively provided with a limiting groove 19 arranged in an arc shape with the operating rod a41 as the center, the limiting groove 19 is communicated with the first valve cavity 11, and the linkage rod 43 extends into the limiting groove 19 and is linked with the manual valve core 40, so that when the operating rod a41 rotates, it can drive the manual valve cores 40 on both sides to slide back and forth along the corresponding first valve cavity 11 through the driving block 42. Furthermore, the spacing of the limit grooves 19 is slightly larger than the diameter of the linkage rod 43. Through this setting, the reciprocating rotational motion of the operating rod a41 is converted into the reciprocating linear motion of the manual valve core 40, that is, with the reciprocating rotational motion of the operating rod a41, the functions of manual oil suction and oil pumping are realized.

[0033] A distribution valve core 50 is provided in the second valve chamber 12, and an operating rod b51 is provided on the valve seat 10 for driving the distribution valve core 50 to change direction. The outer end of the operating rod b51 extends outside the valve seat 10. Specifically, the distribution valve core 50 is rotatably provided in the second valve chamber 12, and the lifting action and the lowering action are switched by driving the operating rod b51 to rotate.

[0034] In order to limit the depth of the distribution valve core 50 extending into the second valve chamber 12, prevent the working port A17 from being misaligned with the connecting hole c53 or the return oil channel 52, and also prevent the working port B18 from being misaligned with the connecting hole c53 or the return oil channel 52, a cutout groove 55 is provided at the position where the distribution valve core 50 of the present invention extends out of the valve seat 10, and a limit block 56 is detachably installed on the outer end surface of the valve seat 10. The limit block 56 is partially inserted into the cutout groove 55 and cooperates with the cutout groove 55 to limit the position, thereby effectively controlling the depth of the distribution valve core 50 extending into the second valve chamber 12.

[0035] The distribution valve core 50 is provided with a first limiting surface 551 on both sides corresponding to the incision groove 55, and the limiting block 56 is provided with a second limiting surface 561 at the position corresponding to the first limiting surface 551. The rotation angle of the distribution valve core 50 is limited by the cooperation of the first limiting surface 551 and the second limiting surface 561. In the present invention, the incision groove 55 is a U-shaped groove structure, which includes a semicircular groove and a strip groove located on both sides of the semicircular groove. The first limiting surface is the two inner end surfaces of the strip groove. The first limiting surface 551 and the second limiting surface 561 are respectively provided with two groups, and each group of the first limiting surface 551 and the second limiting surface 561 corresponds one to one. The rotation stroke of the distribution valve core 50 in the present invention is 180°, that is, 90° in the forward rotation and 90° in the reverse rotation.

[0036] The oil passage a13 connects the two groups of first valve chambers 11 and the second valve chamber 12, and the oil passage b14 connects the oil tank 20 and the oil passage a13. The positions of the oil passage a13 corresponding to the two groups of first valve chambers 11 are respectively provided with one-way balls 131 for isolating the oil passage a13 and the oil passage b14. Under normal circumstances, the one-way ball 131 is in the position of isolating the oil passage a13 and the oil passage b14. When the operating lever a41 rotates back and forth continuously, it drives the manual valve core 40 to slide back and forth continuously in the first valve chamber 11, and the oil passage a13 generates negative pressure. The one-way ball 131 is pushed open under the action of the pressure difference on both sides, so that the oil passage a13 and the oil passage b14 are connected. At this time, the hydraulic oil in the oil tank 20 enters the second valve chamber 12 through the oil passage b14 and the oil passage a13 in turn.

[0037] An oil passage d16 is provided in the valve seat 10, connecting the oil tank 20 and the inner cavity of the motor pump assembly 30. An oil passage g is provided in the valve seat 10, connecting the output end of the motor pump assembly 30 and the oil passage a13. When the motor pump assembly 30 is working, the oil passage g and the oil passage a13 generate negative pressure, and the one-way ball 131 is pushed open under the action of the pressure difference on both sides, so that the oil passage a13 and the oil passage b14 are connected. At this time, the hydraulic oil in the oil tank 20 enters the second valve chamber 12 through the oil passage b14 and the oil passage a13 in turn.

[0038] The distribution valve core 50 is provided with an oil return channel 52 connected to the oil tank 20, and the valve seat 10 is provided with a working port A17 and a working port B18 connected to the second valve chamber 12. The oil channel a13 is switched to connect to one of the working port A17 and the working port B18 through the distribution valve core 50, and the other working port is switched to be isolated from the oil channel a13 and connected to the oil tank 20 through the oil return channel 52. A one-way valve structure 132 is provided in the oil channel a13 to prevent the oil pressure in the second valve chamber 12 from flowing back to the oil channel a13.

[0039] A central flow channel 44 is provided in the manual valve core 40, and the central flow channel 44 communicates with the oil tank 20 and the oil channel a13. An overflow port 45 connected to the oil tank 20 is provided at the central flow channel 44. A support seat a46, an elastic member a47 and a ball head a48 are provided in sequence in the direction close to the oil channel a13. A valve port is provided on the side of the manual valve core 40 adjacent to the oil channel a13. The elastic member a47 is arranged between the support seat a46 and the ball head a48. The ball head a48 blocks the valve under the action of the elastic member a47. To allow the elastic member a47 to better act on the ball head a48, the present invention adds an inverted cone block 481 between the elastic member a47 and the ball head a48. The side of the inverted cone block 481 adjacent to the elastic member a47 is a flat surface, and the side of the inverted cone block 481 adjacent to the ball head a48 is a tapered groove. The ball head a48 is seated at the notch of the tapered groove. The support seat a46 is provided with a connecting hole a connecting the central flow channel 44 and the oil tank 20. The outer periphery of the manual valve core 40 is provided with a piston sleeve 49 that contacts the cavity wall of the first valve chamber 11. When the hydraulic oil pressure in the oil channel a13 exceeds the set value, the hydraulic oil in the oil channel a13 overcomes the elastic action of the elastic member a47 and pushes open the ball head a48, causing the central flow channel 44 to be opened. At this time, the hydraulic oil in the oil channel a13 flows back into the oil tank 20 through the central flow channel 44, and the overflow port 45 is provided to provide a safety function.

[0040] The oil channel a13 includes a first flow channel 133 corresponding one-to-one to the first valve chamber 11 and a second flow channel 134 connecting the two groups of first flow channels 133. The first flow channel 133 is connected to the second valve chamber 12 through the second flow channel 134. In the present invention, the two first flow channels 133 are arranged in parallel, and the second flow channel 134 is arranged between the two first flow channels 133. The middle part of the second flow channel 134 is connected to the second valve chamber 12.

[0041] The one-way valve structure 132 is arranged in the second flow channel 134. The one-way valve structure 132 includes an elastic member b1321 and a ball b1322 arranged on both sides of the elastic member b1321. A step portion is provided on one side of the second flow channel 134, and a support seat b1323 is provided on the other side of the second flow channel 134. The one-way valve assembly is respectively arranged between the step portion and the support seat b1323. The support seat b1323 is provided with a connecting hole b connecting the second flow channel 134 and the first flow channel 133 on the corresponding side. The one-way valve assembly is used to prevent oil backflow.

[0042] The operating rod a41 and the operating rod b51 are both arranged on the bottom end surface of the valve seat 10, and the manual valve core 40 and the distribution valve core 50 are arranged vertically. The present invention arranges the operating rod a41 and the operating rod b51 on the same end surface of the valve seat 10 for easy use by the operator.

[0043] The distribution valve core 50 is provided with three internally interconnected communicating holes c53 on the outer periphery. The communicating holes c53 are isolated from the return oil channel 52. The communicating ports c are respectively provided with sealing members 54 that contact the cavity wall of the second valve chamber 12. The center of the sealing member 54 is provided with a through groove. Specifically, the return oil channel 52 includes an oil return port at the same depth as the communicating hole c53. The three communicating holes c53 and the return oil port are separated at equal angles around the distribution valve core 50. Furthermore, the working port A17 is connected to the second valve chamber 12 through the oil channel e, and the working port B18 is connected to the second valve chamber 12 through the oil channel f. When the working port A17 is connected to the oil channel a13 through the oil channel e and the communicating port c, the working port B18 is connected to the oil tank 20 through the oil channel f and the return oil channel 52. When the working port B18 is connected to the oil channel a13 through the oil channel f and the communicating port c, the working port A17 is connected to the oil tank 20 through the oil channel e and the return oil channel 52.

[0044] The valve seat 10 is provided with a relay 60 electrically connected to the motor pump assembly 30 , and the motor pump assembly 30 is driven by the relay 60 .

[0045] The operating rod a41 includes an inner cylindrical section 411 and an outer nut section 412. A through hole is provided in the valve seat 10 for the inner cylindrical section 411 to pass through. A plurality of self-lubricating bearings 413 are provided from the inside to the outside of the through hole. O-rings 414 are provided between adjacent self-lubricating bearings 413. A groove with a diameter larger than the through hole is provided at the outer end of the through hole. A dust cover 415 is provided in the groove. A dust ring 416 is provided between the dust cover 415 and the inner cylindrical section 411. The dust ring 416 prevents external dust from clogging the self-lubricating bearing 413. The inner cylindrical section 411 is fixedly connected to the drive block 42 by a pin, and the operating rod a41 is rotated by the outer nut section 412.

[0046] When the distribution valve core 50 is rotated to the position where the two connecting ports c connect to the working port A17 and the oil channel a13, in this position the working port B18 is connected to the oil return channel 52. At this time, the operating lever a41 is manually driven to rotate (manual oiling) or the motor pump assembly 30 is operated (electric oiling). At this time, negative pressure is generated in the oil channels a13 on both sides. The hydraulic oil in the oil tank 20 flows through the oil channel b14, the oil channel a13, the connecting hole c53 of the distribution valve core 50, and the oil channel e to the working port A17, and finally enters the upper chamber of the oil cylinder. At the same time, the hydraulic oil in the lower chamber of the oil cylinder flows back to the oil tank 20 through the working port B18, the oil channel f, the oil return channel 52, and the oil channel c15 in sequence. At this time, the output end of the oil cylinder descends.

[0047] When the distribution valve core 50 is rotated to the position where the two connecting ports c connect the working port B18 and the oil channel a13, the working port A17 is connected to the return oil channel 52 in this position. At this time, the operating lever a41 is manually driven to rotate (manual oiling) or the motor pump assembly 30 is operated (electric oiling). At this time, negative pressure is generated in the oil channels a13 on both sides, and the hydraulic oil in the oil tank 20 enters the working port B18 through the oil channel b14, the oil channel a13, the connecting hole c53 of the distribution valve core 50 and the oil channel f, and finally enters the lower chamber of the oil cylinder. At the same time, the hydraulic oil in the upper chamber of the oil cylinder flows back to the oil tank 20 through the working port A17, the oil channel e, the return oil channel 52, and the oil channel c15 in sequence. At this time, the external oil cylinder is lifted.

[0048] In summary, the present invention has the following beneficial effects:

[0049] The flashlight combination pump of the present invention is provided with a double manual valve core 40 and the oil circuit system of the valve seat 10 is improved so that when the user operates the operating lever a41 once, the displacement of the flashlight combination pump of the present invention is increased to twice the original amount, thereby effectively improving the user's operating convenience.

[0050] The above description is only a preferred embodiment of the present invention. Therefore, any 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 flashlight combination pump with a double-plunger manual function, comprising a valve seat (10), an oil tank (20) and a motor pump assembly (30) arranged on the valve seat (10), wherein a first valve chamber (11), a second valve chamber (12), an oil passage a (13), an oil passage b (14) and an oil passage c (15) are provided in the valve seat (10), the motor pump assembly (30) is connected to the oil passage a (13) through the oil passage c (15), and when the motor pump assembly (30) is driven, the oil passage a (13) is converted into an oil suction state, characterized in that: The first valve chamber (11) is provided with two groups, a manual valve core (40) is provided in the first valve chamber (11), an operating rod a (41) for driving the two groups of manual valve cores (40) to slide back and forth is provided on the valve seat (10), a distribution valve core (50) is provided in the second valve chamber (12), an operating rod b (51) for driving the distribution valve core (50) to switch is provided on the valve seat (10), an oil passage a (13) connects the two groups of first valve chambers (11) and the second valve chamber (12), an oil passage b (14) connects the oil tank (20) and the oil passage a (13), and a one-way ball (131) for isolating the oil passage a (13) and the oil passage b (14) is provided at the positions of the oil passage a (13) corresponding to the two groups of first valve chambers (11). The seat (10) is provided with an oil passage d (16) communicating with the oil tank (20) and the inner cavity of the motor pump assembly (30); the distribution valve core (50) is provided with an oil return passage (52) communicating with the oil tank (20); the valve seat (10) is provided with a working port A (17) and a working port B (18) communicating with the second valve cavity (12); the oil passage a (13) is switched to communicate with one of the working port A (17) and the working port B (18) through the distribution valve core (50); the other working port is switched to be isolated from the oil passage a (13) and communicated with the oil tank (20) through the oil return passage (52); the oil passage a (13) is provided with a one-way valve structure (132) for preventing the oil pressure in the second valve cavity (12) from flowing back to the oil passage a (13); The inner end of the operating rod a (41) is connected to a driving block (42) arranged in the oil tank (20), and linkage rods (43) are respectively provided on both sides of the driving block (42). The valve seat (10) is respectively provided with a limiting groove (19) arranged in an arc shape with the operating rod a (41) as the center. The limiting groove (19) is connected to the first valve cavity (11). The linkage rod (43) extends into the limiting groove (19) and is linked with the manual valve core (40), so that when the operating rod a (41) rotates, it can drive the manual valve cores (40) on both sides to slide back and forth along the corresponding first valve cavity (11) through the driving block (42).

2. The cab flip flashlight combination pump with a double plunger manual function according to claim 1, characterized in that: The manual valve core (40) is provided with a central flow channel (44), the central flow channel (44) is connected to the oil tank (20) and the oil channel a (13), the central flow channel (44) is provided with an overflow port (45) connected to the oil tank (20), the central flow channel (44) is provided with a support seat a (46), an elastic member a (47) and a ball head a (48) arranged in sequence in the direction close to the oil channel a (13), a valve port is provided on one side of the manual valve core (40) adjacent to the oil channel a (13), the elastic member a (47) is arranged between the support seat a (46) and the ball head a (48), and the ball head a (48) blocks the valve port under the action of the elastic member a (47), the support seat a (46) is provided with a connecting hole a connecting the central flow channel (44) and the oil tank (20), and the outer periphery of the manual valve core (40) is provided with a piston sleeve (49) that contacts the cavity wall of the first valve cavity (11).

3. The cab flip flashlight combination pump with a double plunger manual function according to claim 1, characterized in that: The oil passage a (13) includes a first flow passage (133) corresponding one-to-one to the first valve chamber (11) and a second flow passage (134) connecting the two groups of first flow passages (133). The first flow passage (133) is connected to the second valve chamber (12) through the second flow passage (134).

4. The cab flip flashlight combination pump with a double plunger manual function according to claim 3, characterized in that: The one-way valve structure (132) is arranged in the second flow channel (134), and the one-way valve structure (132) includes an elastic member b (1321) and spheres b (1322) arranged on both sides of the elastic member b (1321). A step portion is provided on one side of the second flow channel (134), and a support seat b (1323) is provided on the other side of the second flow channel (134). The one-way valve assembly is respectively arranged between the step portion and the support seat b (1323), and the support seat b (1323) is provided with a connecting hole b connecting the second flow channel (134) and the first flow channel (133) on the corresponding side.

5. The cab flip flashlight combination pump with a double plunger manual function according to claim 1, characterized in that: The operating rod a (41) and the operating rod b (51) are both arranged on the bottom end surface of the valve seat (10), and the manual valve core (40) and the distribution valve core (50) are arranged vertically.

6. The cab flip flashlight combination pump with a double plunger manual function according to claim 5, characterized in that: The outer periphery of the distribution valve core (50) is provided with three internally interconnected communication holes c (53), the communication holes c (53) are isolated from the oil return channel (52), and sealing members (54) are respectively provided at the communication ports c, which are in contact with the cavity wall of the second valve cavity (12), and a through groove is provided at the center of the sealing member (54).

7. The cab flip flashlight combination pump with a double plunger manual function according to claim 6, characterized in that: The working port A (17) is connected to the second valve chamber (12) through the oil passage e, and the working port B (18) is connected to the second valve chamber (12) through the oil passage f. When the working port A (17) is connected to the oil passage a (13) through the oil passage e and the connecting port c, the working port B (18) is connected to the oil tank (20) through the oil passage f and the oil return passage (52). When the working port B (18) is connected to the oil passage a (13) through the oil passage f and the connecting port c, the working port A (17) is connected to the oil tank (20) through the oil passage e and the oil return passage (52).

8. The cab flip flashlight combination pump with a double plunger manual function according to claim 1, characterized in that: The distribution valve core (50) is provided with a notch groove (55) at one end extending out of the valve seat (10), and the bottom of the valve seat (10) is detachably connected to a limiting block (56), and the limiting block (56) is partially inserted into the notch groove (55) and cooperates with the notch groove (55) to limit the depth of the distribution valve core (50) inserted into the second valve cavity (12), and the distribution valve core (50) is provided with a first limiting surface (551) on both sides corresponding to the notch groove (55), and the limiting block (56) is provided with a second limiting surface (561) at the position corresponding to the first limiting surface (551), and the rotation angle of the distribution valve core (50) is limited by the cooperation of the first limiting surface (551) and the second limiting surface (561).

9. The cab flip flashlight combination pump with a double plunger manual function according to claim 1, characterized in that: The operating rod a (41) includes an inner cylindrical section (411) and an outer nut section (412). A through hole is provided in the valve seat (10) for the inner cylindrical section (411) to pass through. A plurality of groups of self-lubricating bearings (413) are provided in the through hole from the inside to the outside. An O-type sealing ring (414) is provided between adjacent self-lubricating bearings (413). A groove with a larger diameter than the through hole is provided at the outer end of the through hole. A dust cover (415) is provided in the groove. A dust ring (416) is provided between the dust cover (415) and the inner cylindrical section (411). The dust ring (416) prevents external dust from clogging the self-lubricating bearings (413). The inner cylindrical section (411) and the driving block (42) are fixedly connected by a pin. The operating rod a (41) rotates through the outer nut section (412).

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