CN218407988U

CN218407988U - Three-power-source oil pump and jack applying same

Info

Publication number: CN218407988U
Application number: CN202221999424.XU
Authority: CN
Inventors: 杨军; 金建平; 赵国东
Original assignee: Jiaxing Jinrisheng Tools Co ltd
Current assignee: Jiaxing Jinrisheng Tools Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-01-31
Anticipated expiration: 2032-07-28

Abstract

The utility model provides a three power supply oil pumps belongs to hydro-cylinder technical field, the on-line screen storage device comprises a base, a fixedly connected with cylinder body on the base, sliding connection has a piston rod on the inner wall of cylinder body, a fixedly connected with piston head is served at piston rod, piston head sliding connection is on the inner wall of cylinder body, be equipped with an oil storage tank on the cylinder body, be equipped with two sets of independent oil circuits on the base, be equipped with the manual pump body and the hydraulic pressure pump body on two oil circuits respectively, a connecting hole has been seted up on the oil circuit of the hydraulic pressure pump body, can connect external hydraulic pressure oil circuit on the connecting hole inner wall, the utility model has the advantages of having made things convenient for the operator to select the power supply as required, the operator can a power supply of exclusive use, perhaps also can use a plurality of power supplies to drive the piston rod motion.

Description

Three-power-source oil pump and jack applying same

Technical Field

The utility model belongs to the technical field of the hydro-cylinder, especially a three power supply oil pumps.

Background

The hydraulic oil cylinder is a hydraulic actuating element for converting hydraulic energy into mechanical energy, can do linear reciprocating motion, moves stably and has no transmission clearance, so the hydraulic oil cylinder is widely applied to hydraulic systems of various machines, but continuously operates in a high-pressure environment.

The existing oil cylinder is usually provided with only one interface of a power source in the using process, when the power source needs to be replaced, an operator needs to disassemble the original power source and then connect a new power source, and the oil cylinder is troublesome to use.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a three power supply oil pump, had and made things convenient for the operator to select the power supply as required, the operator can a power supply of exclusive use, perhaps also can use a plurality of power supplies to drive the characteristics of piston rod motion.

The purpose of the utility model can be realized by the following technical proposal:

a three-power-source oil pump comprises a base, wherein a cylinder body is fixedly connected to the base, a piston rod is connected to the inner wall of the cylinder body in a sliding mode, a piston head is fixedly connected to one end of the piston rod, the piston head is connected to the inner wall of the cylinder body in a sliding mode, an oil storage tank is arranged on the cylinder body, two groups of independent oil paths are arranged on the base, a manual pump body and a hydraulic pump body are arranged on the two oil paths respectively, a connecting hole is formed in the oil path of the hydraulic pump body, and the inner wall of the connecting hole can be connected with an external hydraulic oil path; the oil circuit is including offering the first hole on the base, offer the second hole that first hole one end was served, offer the third hole on the one end terminal surface of keeping away from first hole in the second hole, offer the fourth hole on third hole bottom, offer the inlet port on fourth hole lateral wall, offer the power hole on third hole inner wall, offer the mounting hole on the base outer wall, set up the load protection mechanism on the third hole, install the first ball in the third hole, install the second ball in the fourth hole and set up and be used for making things convenient for the piston rod slowly to fall the pressure release mechanism that drops when empty load on the base, the one end and the oil storage tank intercommunication in second hole are kept away from in the first hole, the diameter of third hole is greater than the diameter in second hole, the diameter in fourth hole is greater than the diameter in third hole, the second ball supports tightly on the one end that the fourth hole is close to the third hole, the one end and the cylinder body inner wall intercommunication in fourth hole are kept away from in the inlet hole, the mounting hole and the hydraulic pressure mounting hole is installed in the manual pump body.

Further, the load protection mechanism includes a fifth hole formed in the inner wall of the third hole, a sixth hole formed in the side wall of the fifth hole, a first threaded hole formed in the outer wall of the base, a first threaded column in the first threaded hole in threaded connection, a abutting spring sleeved on one end of the first threaded column, an abutting block abutting on one end of the abutting spring, a third ball installed on one side, away from the abutting spring, of the abutting block, and an oil return hole formed in the inner wall of the second hole, the sixth hole is communicated with the first threaded hole, the third ball blocks the sixth hole under the action of the restoring force of the abutting spring, the third ball abuts on one end, away from the fifth hole, of the sixth hole, and the oil return hole is communicated with the first threaded hole.

Further, the pressure relief mechanism comprises a seventh hole formed in the side wall of the base close to the cylinder body, an eighth hole formed in the side wall of one end of the seventh hole, a ninth hole formed in the bottom of the eighth hole, a second threaded hole formed in the end of the base far away from the cylinder body, a tenth hole formed in the bottom of the second threaded hole, a fourth ball mounted in the second threaded hole, a second threaded post connected to the second threaded hole in a threaded manner, and a pressure relief piece arranged on the side wall of one end of the seventh hole close to the eighth hole and used for facilitating slow-down no-load and fast-down of the piston rod load, wherein the diameter of the ninth hole is smaller than that of the eighth hole, the ninth hole is communicated with the second threaded hole, the diameter of the tenth hole is smaller than that of the second threaded hole, and the fourth ball abuts against the tenth hole through the second threaded post and blocks up the tenth hole.

Further, the pressure release piece is including offering the third screw post on the pressure release hole inner wall of pressure release hole, threaded connection on the base outer wall, supporting tight ring, both ends of supporting on the eighth hole inner wall and supporting tight first butt spring, the second butt spring of installing on the inner wall of butt spring and setting up the fifth ball that is served at the second butt spring on supporting tight ring and third screw post respectively, the elastic coefficient of first butt spring is greater than the elastic coefficient of second butt spring, the both ends of second butt spring butt respectively on fifth ball and third screw post, pressure release hole and seventh hole intercommunication, the pressure release hole is coaxial setting with the eighth hole, and the ninth hole is plugged up to the fifth ball.

Furthermore, an annular groove has been seted up on the second screw thread post outer wall install a baffle on the base outer wall, baffle one end butt is on the annular groove bottom, and threaded connection has a locking bolt on the baffle, and locking bolt threaded connection is on the base outer wall.

Furthermore, a protection groove has been seted up on the one end inner wall that the fourth hole was kept away from to the inlet port, one side and the cylinder body inner wall intercommunication in protection groove installs the sixth ball on the protection groove inner wall through a bolt fixedly connected with separation blade, the separation blade is with the locking of sixth ball in protection groove on the base outer wall.

A jack, includes supporting seat, crane arm subassembly and can provide the hydraulic assembly of power for crane arm subassembly, hydraulic assembly sets up to the aforesaid three power source oil pumps

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a be equipped with two independent oil circuits on the base, be equipped with the manual pump body and the hydraulic pump body on two independent oil circuits respectively, the connecting hole has been seted up on the oil circuit of the hydraulic pump body, can connect external hydraulic pressure oil circuit on the connecting hole inner wall, through such setting, moreover, the steam generator is simple in structure, high durability and convenient operation, through setting up two independent oil circuits, made things convenient for the operator to select the power supply as required, the operator can a power supply of exclusive use, perhaps also can use a plurality of power supplies to drive the piston rod motion.

2. The utility model discloses a rotate second screw thread post, second screw thread post breaks away from the fourth ball, the fourth ball breaks away from the tenth hole, hydraulic oil on the cylinder body inner wall moves to the ninth hole from the tenth hole, under the condition that the piston rod is in the load, the pressure of hydraulic oil is great, hydraulic oil drive fifth ball compression second butt spring, the fifth ball supports tightly on supporting the tight ring, make hydraulic oil from the fifth ball and support the space between the tight ring slowly pass through, hydraulic oil gets into the oil storage tank from seventh hole and eighth hole, when the piston rod is in idle load, hydraulic oil gets into in the second screw hole from the tenth hole, under the effect of hydraulic oil, the fifth ball breaks away from the ninth hole, hydraulic oil is from the ninth hole, support the tight ring inner wall, eighth hole and seventh hole get into in the oil storage tank, through such setting, moreover, the steam generator is simple in structure, and convenient for operation, the piston rod has made things convenient for buffering, and the service life of device is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a cross-sectional view of the structure of the first embodiment of the present invention, in order to show the oil path;

fig. 3 is a cross-sectional view of the structure of the first embodiment of the present invention, in order to show the power hole and the mounting hole;

fig. 4 is a cross-sectional view of the structure of the first embodiment of the present invention, in order to show the pressure relief mechanism;

FIG. 5 is a schematic view of a base structure of an embodiment of the present invention, illustrating a protection groove;

fig. 6 is a schematic structural diagram of a second embodiment of the present invention.

In the figure, 1, a base; 2. a cylinder body; 3. a piston rod; 4. a piston head; 5. an oil storage tank; 6. an oil path; 7. a manual pump body; 8. a hydraulic pump body; 9. connecting holes; 10. a first hole; 11. a second hole; 12. a third aperture; 13. a fourth aperture; 14. an oil inlet hole; 15. a power aperture; 16. mounting holes; 17. a load protection mechanism; 18. a first ball; 19. a second ball; 20. a pressure relief mechanism; 21. a fifth aperture; 22. a sixth aperture; 23. a first threaded hole; 24. a first threaded post; 25. the spring is tightly propped; 26. a tightening block; 27. a third ball; 28. A seventh hole; 29. an eighth hole; 30. a ninth well; 31. a second threaded hole; 32. a tenth aperture; 33. a fourth ball; 34. a second threaded post; 35. releasing the pressure; 36. a pressure relief vent; 37. a third threaded post; 38. a tightening ring; 39. a first abutting spring; 40. a second abutting spring; 41. a fifth ball; 42. a ring groove; 43. a baffle plate; 44. a protective slot; 45. A sixth ball; 46. a baffle plate; 47. a supporting seat; 48. a boom assembly; 49. and a hydraulic assembly.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, a three-power-source oil pump includes a base 1, a cylinder body 2 fixedly connected to the base 1, a piston rod 3 slidably connected to an inner wall of the cylinder body 2, a piston head 4 fixedly connected to one end of the piston rod 3, the piston head 4 slidably connected to an inner wall of the cylinder body 2, and an oil storage tank 5 disposed on the cylinder body 2.

As shown in fig. 1, 2, 3, 4 and 5, two sets of independent oil paths 6 are arranged on the base 1, a manual pump body 7 and a hydraulic pump body 8 are respectively arranged on the two oil paths 6, a connecting hole 9 is arranged on the oil path 6 of the hydraulic body, and the inner wall of the connecting hole 9 can be connected with an external hydraulic oil path.

As shown in fig. 1, 2, 3, 4, and 5, the oil path 6 includes a first hole 10, a second hole 11, a third hole 12, a fourth hole 13, an oil inlet 14, a power hole 15, an installation hole 16, a load protection mechanism 17, a first ball 18, a second ball 19, and a pressure relief mechanism 20, the first hole 10 is opened on the base 1, one end of the first hole 10 communicates with the oil storage tank 5 on the cylinder body 2, the second hole 11 is opened on an inner wall of one end of the first hole 10, the third hole 12 is opened on a Kong Deshang of the second hole 11 far from the first hole 10, the diameter of the second hole 11 is larger than that of the second hole 11, the fourth hole 13 is opened on the bottom of the third hole 12, the diameter of the fourth hole 13 is larger than that of the third hole 12, the oil inlet 14 is opened on a side wall of the fourth hole 13, one end of the oil inlet 14 far from the fourth hole 13 communicates with the inside of the cylinder body 2, the first ball 18 is installed in the third hole 12, the third hole 18 is tightly installed on the third hole 12, the outer wall of the third hole 12, the piston rod 14 is installed on the third hole 12, the piston rod 17 is installed on the third hole 12, the piston rod 15, the piston rod is installed on the load protection mechanism 20, the piston rod 15, the piston rod protection mechanism 20, the piston rod protection mechanism is installed on the third hole 12, the piston rod 15, the piston rod protection mechanism 20, the piston rod protection mechanism for limiting the piston rod.

As shown in fig. 1, 2, 3, 4, and 5, the load protection mechanism 17 includes a fifth hole 21, a sixth hole 22, a first threaded hole 23, a first threaded post 24, a tightening spring 25, a tightening block 26, a third ball 27, and an oil return hole, where the fifth hole 21 is formed in the inner wall of the third hole 12, the sixth hole 22 is formed in the side wall of the fifth hole 21, the first threaded hole 23 is formed in the outer wall of the base 1, the first threaded hole 23 is communicated with the sixth hole 22, the first threaded post 24 is threaded in the first threaded hole 23, the tightening spring 25 is sleeved on one end of the first threaded post 24, the tightening block 26 is tightened on one end of the tightening spring 25, the third ball 27 is installed on the side wall of the tightening spring 25 far from the tightening spring 25, the third ball 27 is tightened on the sixth hole 22 under the restoring force of the tightening spring 25, the third ball 27 blocks the sixth hole 22, the oil return hole is formed in the inner wall of the second hole 11, and the first threaded hole 23 is communicated with the first threaded hole 23.

As shown in fig. 1, 2, 3, 4, and 5, the pressure relief member 35 includes a seventh hole 28, an eighth hole 29, a ninth hole 30, a second threaded hole 31, a tenth hole 32, a fourth ball 33, a second threaded post 34, and a pressure relief member 35, the seventh hole 28 is opened on a side wall of the base 1 near the cylinder 2, one end of the seventh hole 28 communicates with the oil storage tank 5 on the cylinder 2, the eighth hole 29 is opened on a side wall of one end of the seventh hole 28, the ninth hole 30 is opened on a bottom of the eighth hole 29, the diameter of the ninth hole 30 is smaller than that of the eighth hole 29, the second threaded hole 31 is opened on an end of the base 1 far from the cylinder 2, the ninth hole 30 communicates with the second threaded hole 31, the tenth hole 32 is opened on a second threaded hole 31 Kong Deshang, one end of the tenth hole 32 far from the second threaded hole 31 communicates with the inside of the cylinder 2, the fourth ball 33 is installed in the second threaded hole 31, the second threaded post 34 tightly blocks the fourth ball 33 on the tenth hole 32, and the eighth hole 35 is arranged near the seventh hole 35 for facilitating the pressure relief member 35 to be loaded and unloaded.

As shown in fig. 1, 2, 3, 4, and 5, the pressure relief piece 35 includes a pressure relief hole 36, a third threaded post 37, a tightening ring 38, a first tightening spring 39, a second tightening spring 40, and a fifth ball 41, the pressure relief hole 36 is opened on the outer wall of the base 1, the pressure relief hole 36 is communicated with the seventh hole 28, the pressure relief hole 36 and the eighth hole 29 are coaxially disposed, the third threaded post 37 is screwed on the inner wall of the pressure relief hole 36, the tightening ring 38 is tightened on the inner wall of the eighth hole 29, two ends of the first tightening spring 39 are tightened on the tightening ring 38 and the third threaded post 37 respectively, the second tightening spring 40 is disposed on the inner wall of the first tightening spring 39, one end of the second tightening spring 40 is tightened on the third threaded post 37, the fifth ball 41 is disposed on one end of the second tightening spring 40, and the fifth ball 41 is tightened on the ninth hole 30 under the restoring force of the second tightening spring 40.

As shown in fig. 1, 2, 3, 4 and 5, in order to prevent the second threaded column 34 from being detached from the base 1, an annular groove 42 is formed in the outer wall of the second threaded column 34, a baffle 43 is mounted on the outer wall of the base 1, one end of the baffle 43 abuts against the bottom of the annular groove 42, a locking bolt is screwed on the baffle 43, and the locking bolt is screwed on the outer wall of the base 1.

As shown in fig. 1, 2, 3, 4, and 5, in order to improve the stability of the piston rod 3 in jacking, a protection groove 44 is formed in an inner wall of one end of the oil inlet 14 away from the fourth hole 13, one side of the protection cover is communicated with the inside of the cylinder 2, a sixth ball 45 is mounted on the inner wall of the protection groove 44, a stop piece 46 is fixedly connected to the outer wall of the base 1 through a bolt, and the stop piece 46 locks the sixth ball 45 in the protection groove 44.

The utility model discloses theory of operation of embodiment: an operator can select a power source according to needs, and can select a manual pump body 7, a hydraulic pump body 8 or an external hydraulic oil circuit 6;

when the jacking load of the piston rod 3 is overlarge, the hydraulic oil drives the third ball 27 to compress the abutting spring 25, the third ball 27 is separated from the sixth hole 22, and the hydraulic oil returns to the oil storage tank 5 from the fifth hole 21 and the floor drain hole;

when an operator needs to relieve pressure, the second threaded column 34 is rotated, the second threaded column 34 is separated from the fourth ball 33, the fourth ball 33 is separated from the tenth hole 32, hydraulic oil on the inner wall of the cylinder body 2 moves from the tenth hole 32 to the ninth hole 30, when the piston rod 3 is under a load, the pressure of the hydraulic oil is high, the hydraulic oil drives the fifth ball 41 to compress the second abutting spring 40, the fifth ball 41 abuts against the abutting ring 38, the hydraulic oil slowly passes through a gap between the fifth ball 41 and the abutting ring 38, the hydraulic oil enters the oil storage groove 5 from the seventh hole 28 and the eighth hole 29, when the piston rod 3 is under no-load, the hydraulic oil enters the second threaded hole 31 from the tenth hole 32, under the action of the hydraulic oil, the fifth ball 41 is separated from the ninth hole 30, and the hydraulic oil enters the oil storage groove 5 from the ninth hole 30, the inner wall of the abutting ring 38, the eighth hole 29 and the seventh hole 28.

The second embodiment is different from the first embodiment in that: as shown in fig. 6, the second embodiment applies the three-power-source oil pump of the first embodiment to a lifting jack, and the lifting jack comprises a support base 47, a lifting arm assembly 48 and a hydraulic assembly 49 capable of providing power for the lifting arm assembly 48, wherein the hydraulic assembly 49 is provided as the three-power-source oil pump of the first embodiment.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, the base is used more herein; 2. a cylinder body; 3. a piston rod; 4. a piston head; 5. an oil storage tank; 6. an oil path; 7. a manual pump body; 8. a hydraulic pump body; 9. connecting holes; 10. a first hole; 11. a second hole; 12. a third aperture; 13. a fourth aperture; 14. An oil inlet hole; 15. a power aperture; 16. mounting holes; 17. a load protection mechanism; 18. a first ball; 19. a second ball; 20. a pressure relief mechanism; 21. a fifth aperture; 22. a sixth hole; 23. A first threaded hole; 24. a first threaded post; 25. the spring is tightly propped; 26. a propping block; 27. A third ball; 28. a seventh hole; 29. an eighth hole; 30. a ninth well; 31. a second threaded hole; 32. a tenth aperture; 33. a fourth ball; 34. a second threaded post; 35. a pressure relief piece; 36. a pressure relief vent; 37. a third threaded post; 38. a tightening ring; 39. a first abutting spring; 40. a second abutting spring; 41. a fifth ball; 42. a ring groove; 43. a baffle plate; 44. A protective groove; 45. a sixth ball; 46. a baffle plate; 47. a base; 48. a boom assembly; 49. hydraulic assembly, etc., without excluding the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A three-power-source oil pump is characterized by comprising a base (1), wherein a cylinder body (2) is fixedly connected to the base (1), a piston rod (3) is connected to the inner wall of the cylinder body (2) in a sliding manner, a piston head (4) is fixedly connected to one end of the piston rod (3), the piston head (4) is connected to the inner wall of the cylinder body (2) in a sliding manner, an oil storage tank (5) is arranged on the cylinder body (2), two groups of independent oil ways (6) are arranged on the base (1), a manual pump body (7) and a hydraulic pump body (8) are respectively arranged on the two oil ways (6), a connecting hole (9) is formed in the oil way (6) of the hydraulic pump body (8), and an external hydraulic oil way (6) can be connected to the inner wall of the connecting hole (9); the oil circuit (6) comprises a first hole (10) formed in the base (1), a second hole (11) formed in one end of the first hole (10), a third hole (12) formed in the end face of one end, away from the first hole (10), of the second hole (11), a fourth hole (13) formed in the bottom of the third hole (12), an oil inlet hole (14) formed in the side wall of the fourth hole (13), a power hole (15) formed in the inner wall of the third hole (12), a mounting hole (16) formed in the outer wall of the base (1), a load protection mechanism (17) arranged in the third hole (12), a first ball (18) arranged in the third hole (12), a second ball (19) arranged in the fourth hole (13), and a pressure relief mechanism (20) arranged on the base (1) and used for facilitating the slow reduction of the piston rod (3) during the load and the fast reduction, wherein the end, away from the second hole (11), of the first hole (10) is communicated with the oil storage tank (5), the diameter of the third hole (12) is larger than that of the third hole (12), and the third hole (12) is close to the diameter of the third hole (13), one end of the oil inlet hole (14) far away from the fourth hole (13) is communicated with the inner wall of the cylinder body (2), the mounting hole (16) is communicated with the third hole (12), and the manual pump body (7) and the hydraulic pump body (8) are mounted in the mounting hole (16).

2. The oil pump with three power sources as claimed in claim 1, wherein the load protection mechanism (17) comprises a fifth hole (21) formed in the inner wall of the third hole (12), a sixth hole (22) formed in the side wall of the fifth hole (21), a first threaded hole (23) formed in the outer wall of the base (1), a first threaded post (24) screwed in the first threaded hole (23), a resisting spring (25) sleeved on one end of the first threaded post (24), a resisting block (26) tightly contacted with one end of the resisting spring (25), a third ball (27) mounted on one side of the resisting block (26) far from the resisting spring (25), and an oil return hole formed in the inner wall of the second hole (11), wherein the sixth hole (22) is communicated with the first threaded hole (23), the third ball (27) blocks the sixth hole (22) under the action of the restoring force of the resisting spring (25), and the third ball (27) is tightly contacted with the sixth hole (22) far from the fifth hole (21) and communicated with the first threaded hole (23).

3. The oil pump with the three power sources as claimed in claim 2, wherein the pressure relief mechanism (20) comprises a seventh hole (28) formed in the side wall of the base (1) on the side close to the cylinder body (2), an eighth hole (29) formed in the side wall of one end of the seventh hole (28), a ninth hole (30) formed in the bottom of the eighth hole (29), a second threaded hole (31) formed in the end of the base (1) far away from the cylinder body (2), a tenth hole (32) formed in the bottom of the second threaded hole (31), a fourth ball (33) installed in the second threaded hole (31), a second threaded post (34) screwed into the second threaded hole (31), and a pressure relief member (35) arranged on the side wall of one end of the seventh hole (28) close to the eighth hole (29) and used for facilitating slow load reduction and no-load reduction of the piston rod (3), the diameter of the ninth hole (30) is smaller than that of the eighth hole (29), the ninth hole (30) is communicated with the second threaded hole (31), the tenth hole (32) is communicated with the second threaded hole (31), and the tenth threaded post (32) blocks the tenth threaded hole (32) on the tenth threaded post (34).

4. The oil pump with three power sources as claimed in claim 3, wherein the pressure relief member (35) comprises a pressure relief hole (36) formed in the outer wall of the base (1), a third threaded post (37) screwed on the inner wall of the pressure relief hole (36), a pressing ring (38) pressed against the inner wall of the eighth hole (29), a first abutting spring (39) with two ends respectively pressed against the pressing ring (38) and the third threaded post (37), a second abutting spring (40) mounted on the inner wall of the first abutting spring (39), and a fifth ball (41) disposed on one end of the second abutting spring (40), wherein the elastic coefficient of the first abutting spring (39) is greater than that of the second abutting spring (40), two ends of the second abutting spring (40) are respectively pressed against the fifth ball (41) and the third threaded post (37), the pressure relief hole (36) is communicated with the seventh hole (28), the pressure relief hole (36) and the eighth hole (29) are coaxially disposed, and the ninth ball (30) is blocked by the fifth ball (41).

5. The three-power-source oil pump as claimed in claim 4, wherein an annular groove (42) is formed in the outer wall of the second threaded column (34), a baffle plate (43) is mounted on the outer wall of the base (1), one end of the baffle plate (43) abuts against the bottom of the annular groove (42), and a locking bolt is connected to the baffle plate (43) in a threaded manner and is connected to the outer wall of the base (1) in a threaded manner.

6. The oil pump with three power sources as claimed in claim 5, wherein a protection groove (44) is formed in an inner wall of one end, away from the fourth hole (13), of the oil inlet hole (14), one side of the protection groove (44) is communicated with an inner wall of the cylinder body (2), a sixth ball (45) is mounted on the inner wall of the protection groove (44), a blocking piece (46) is fixedly connected to the outer wall of the base (1) through a bolt, and the blocking piece (46) locks the sixth ball (45) in the protection groove (44).

7. A jack, its characterized in that: comprising a support base (47), a boom assembly (48) and a hydraulic assembly (49) capable of powering the boom assembly, said hydraulic assembly (49) being configured as a three-power source oil pump as claimed in claim 6.