CN212744578U

CN212744578U - Differential connection type quick hydraulic cylinder

Info

Publication number: CN212744578U
Application number: CN202021438543.9U
Authority: CN
Inventors: 宗伯良
Original assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Current assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-19
Anticipated expiration: 2030-07-20

Abstract

The utility model relates to a differential connection type quick hydraulic cylinder; the method is characterized in that: the device comprises a connecting pipe, a hydraulic cylinder, a hydraulic rod movably arranged in the hydraulic cylinder, a first end cover sealing one end of the hydraulic cylinder, a second end cover sealing the other end of the hydraulic cylinder, a piston separating the hydraulic cylinder, a first flow port communicating one end of the hydraulic cylinder and a second flow port communicating the other end of the hydraulic cylinder; the hydraulic rod penetrates through the second end cover; the piston is arranged on the hydraulic rod; the first flow opening is formed in the first end cap; the second flow port is formed in the hydraulic cylinder; the connecting pipe is communicated with the second flow port. The problem of hydraulic stem and the piston translation rate that the current scheme caused accelerate very fast that hydraulic stem and piston wearing and tearing lead to the fact the leakage of pneumatic cylinder fluid and the connecting pipe is connected with the pole chamber and appears becoming flexible the leakage that causes fluid and influence the drive speed of pneumatic cylinder etc. is solved.

Description

Differential connection type quick hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder, concretely relates to quick pneumatic cylinder of differential connection formula.

Background

In general, the hydraulic cylinder may be used alone as a driving device, or may be used in combination with a plurality of driving devices or other mechanisms to perform a specific function. The differential connection of the hydraulic cylinder refers to connecting the oil inlet and the oil return of the hydraulic cylinder together and returning the oil in the rod cavity of the oil cylinder to the rodless cavity so as to increase the outward extending speed of the hydraulic cylinder. Differential connections are used in fast forward strokes with no or little load, which increase the speed of motion at the expense of output power. Differential coupling is an effective way to achieve rapid motion without increasing the flow rate of the hydraulic pump. Because the hydraulic cylinder is driven at a high speed, the abrasion in the hydraulic cylinder is serious, and how to solve the problem becomes very important.

The existing scheme adopts the technical scheme that a hydraulic rod is arranged in a cylinder body in a moving mode, and a piston is arranged on the hydraulic rod. The rodless cavity is communicated with the liquid inlet, the connecting pipe is communicated with the rod cavity, and the connecting pipe is communicated with the liquid inlet through the reversing valve. Such a solution has the following problems: (1) the hydraulic rod and the piston move faster, so that the abrasion of the hydraulic rod and the piston is accelerated, and the leakage of oil liquid of the hydraulic cylinder is caused; (2) the connecting pipe is connected with a rod cavity, so that the looseness occurs, the leakage of oil is caused, and the driving speed of the hydraulic cylinder is influenced.

SUMMERY OF THE UTILITY MODEL

The not enough to prior art, the utility model discloses a quick pneumatic cylinder of differential connection formula to solve among the prior art hydraulic stem and the piston translation rate very fast accelerated the wearing and tearing that hydraulic stem and piston caused the pneumatic cylinder fluid leak and the connecting pipe is connected with the pole chamber and appears becoming flexible the drive speed scheduling problem that causes the leakage of fluid to influence the pneumatic cylinder.

The utility model discloses the technical scheme who adopts as follows:

a differential connection type quick hydraulic cylinder;

the device comprises a connecting pipe, a hydraulic cylinder, a hydraulic rod movably arranged in the hydraulic cylinder, a first end cover sealing one end of the hydraulic cylinder, a second end cover sealing the other end of the hydraulic cylinder, a piston separating the hydraulic cylinder, a first flow port communicating one end of the hydraulic cylinder and a second flow port communicating the other end of the hydraulic cylinder; the hydraulic rod penetrates through the second end cover; the piston is arranged on the hydraulic rod; the first flow opening is formed in the first end cap; the second flow port is formed in the hydraulic cylinder; the connecting pipe is communicated with the second flow port.

The further technical scheme is as follows: the hydraulic cylinder comprises a cylinder body and a connecting piece in threaded connection with the other end of the hydraulic cylinder; the second end cap is connected to the connecting piece; the second end cover is embedded into the other end of the hydraulic cylinder.

The further technical scheme is as follows: the second end cover comprises a first sealing ring for sealing the hydraulic rod, a first connecting cover connected to the connecting piece, a second connecting cover for pressing the first sealing ring, a first screw for fixing the first connecting cover and a second screw for fixing the second connecting cover; the first screw penetrates through the first connecting cover and is screwed into the connecting piece; the second screw penetrates through the second connecting cover, and the second screw is screwed into the first connecting cover.

The further technical scheme is as follows: expansion openings are arranged around the first screw in parallel; the connecting piece is in threaded connection with a third screw for pushing the first screw to expand; the third screw is embedded into one end of the first screw screwed into the connecting piece.

The further technical scheme is as follows: the inner side and the outer side of the first connecting cover are respectively provided with a second sealing ring in parallel; the second sealing ring is respectively attached to the other end in the hydraulic cylinder and the outer surface of the hydraulic rod.

The further technical scheme is as follows: the connecting pipe comprises a circulation bent pipe communicated with the second flow port, a circulation straight pipe communicated with the circulation bent pipe and a fixing piece for pushing the circulation straight pipe to be close to the circulation bent pipe; the fixing piece is rotatably arranged on the flow straight pipe; the fixing piece is in threaded connection with the flow elbow.

The further technical scheme is as follows: a first sealing block is arranged around one end of the circulation bent pipe close to the circulation straight pipe in parallel; a second sealing block is arranged around one end of the flow straight pipe close to the flow bent pipe in parallel; the first sealing blocks are embedded between the adjacent second sealing blocks; the second sealing blocks are embedded between the adjacent first sealing blocks.

The further technical scheme is as follows: the piston comprises a plug body sleeved on the hydraulic rod, a locking piece pressing the plug body and a third sealing ring separating the hydraulic cylinder; the locking piece is in threaded connection with the hydraulic rod; the third sealing rings are arranged on the plug body in parallel; a conical surface is arranged around the locking piece; the plug body is provided with a conical groove attached to the conical surface; the retaining member is disposed in the tapered slot.

The further technical scheme is as follows: the first end cover comprises a sealing cover arranged at one end of the hydraulic cylinder, a fourth screw for fixing the sealing cover, a boss arranged around the sealing cover and a fourth sealing ring for sealing one end of the hydraulic cylinder; the boss is embedded into one end of the hydraulic cylinder; the fourth sealing ring is arranged around the outer surface of the boss; the fourth screw penetrates through the sealing cover and the boss respectively, and the fourth screw is screwed into the hydraulic cylinder.

The utility model has the advantages as follows: the utility model discloses a differential connection formula quick pneumatic cylinder adopts fixed circulation straight tube of mounting and circulation return bend. The two ends of the hydraulic cylinder are respectively sealed by a first end cover and a second end cover. The differential connection type quick hydraulic cylinder has the following effects: (1) the first screw is screwed into the connecting piece to screw the third screw, and the third screw pushes the first screw to expand to firmly fix the first screw, so that the second end cover can firmly seal the hydraulic cylinder; (2) the fixing piece is screwed down to pull the circulation straight pipe leftwards, and the first sealing block and the second sealing block are attached to each other, so that the circulation bent pipe and the circulation straight pipe can be connected in a sealing manner to avoid leakage of oil; (3) make the retaining member can be stable compress tightly the cock body through the conical surface, avoid the not hard up wearing and tearing that cause a hydraulic pressure section of thick bamboo of cock body.

Drawings

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

Fig. 2 is an enlarged view of a point a in fig. 1.

Fig. 3 is an enlarged view at B in fig. 1.

In the figure: 1. a hydraulic cylinder; 11. a barrel; 12. a connecting member; 2. a hydraulic lever; 3. a first end cap; 31. a sealing cover; 32. a fourth screw; 33. a boss; 34. a fourth seal ring; 4. a second end cap; 41. a first connection cover; 42. a second connecting cover; 43. a first screw; 44. a second screw; 45. a first seal ring; 46. expanding the mouth; 47. a third screw; 48. a second seal ring; 5. a piston; 51. a plug body; 52. a locking member; 53. a third seal ring; 54. a conical groove; 6. a connecting pipe; 61. a flow-through elbow; 62. a flow-through straight tube; 63. a fixing member; 64. a first seal block; 65. a second seal block; 7. a first flow port; 8. a second flow port.

Detailed Description

The following describes a specific embodiment of the present embodiment with reference to the drawings.

Fig. 1 is a schematic structural diagram of the present invention. Fig. 2 is an enlarged view of a point a in fig. 1. Fig. 3 is an enlarged view at B in fig. 1. With reference to fig. 1, 2 and 3, the utility model discloses a differential connection type quick hydraulic cylinder. The direction of X in the figure does the utility model discloses structure schematic's upper end, the direction of Y in the figure does the utility model discloses structure schematic's right-hand member. The differential connection type quick hydraulic cylinder comprises a connecting pipe 6, a hydraulic cylinder 1, a hydraulic rod 2 movably arranged in the hydraulic cylinder 1, a first end cover 3 sealing one end of the hydraulic cylinder 1, a second end cover 4 sealing the other end of the hydraulic cylinder 1, a piston 5 separating the hydraulic cylinder 1, a first flow port 7 communicating one end of the hydraulic cylinder 1 and a second flow port 8 communicating the other end of the hydraulic cylinder 1. The hydraulic rod 2 is arranged on the second end cover 4 in a penetrating mode. The piston 5 is arranged on the hydraulic rod 2. A first flow port 7 opens in the first end cap 3. The second flow port 8 opens in the hydraulic cylinder 1. The connecting pipe 6 communicates with the second flow port 8.

The hydraulic cylinder 1 comprises a cylinder body 11 and a connecting piece 12 which is in threaded connection with the other end of the hydraulic cylinder 1. The second end cap 4 is attached to the connecting member 12. The second end cap 4 is inserted into the other end of the hydraulic cylinder 1.

The cylinder 11 is arranged in the left-right direction. The second end cap 4 is disposed at the left end of the barrel 11. The outer end of the second end cap 4 is connected to a connector 12. The inner end of the second end cap 4 is embedded in the left end of the hydraulic cylinder 1. The position of the connecting member 12 can be adjusted by screwing the connecting member 12.

The second end cap 4 includes a first packing 45 sealing the hydraulic rod 2, a first connection cap 41 connected to the connection member 12, a second connection cap 42 pressing the first packing 45, a first screw 43 fixing the first connection cap 41, and a second screw 44 fixing the second connection cap 42. The first screw 43 passes through the first connection cover 41, and the first screw 43 is screwed into the connection member 12. The second screw 44 passes through the second connection cover 42, and the second screw 44 is screwed into the first connection cover 41.

Preferably, the first seal 45 is a rubber seal. The first connection cap 41 is provided at the left end of the cylinder 11. The second connection cap 42 is disposed at the left end of the first connection cap 41. A first packing 45 is provided at the left end of the first connection cover 41 near the hydraulic rod 2. A first screw 43 is passed through the outer end of the first connection cover 41, and the right end of the first screw 43 is screwed into the connection member 12. The second screw 44 passes through the second connection cover 42, and the right end of the second screw 44 is screwed into the left end of the first connection cover 41.

Flared openings 46 are provided in parallel around the first screw 43. The connector 12 is threaded with a third screw 47 which pushes the first screw 43 to expand. The third screw 47 is embedded in the end of the first screw 43 screwed into the connector 12.

The expansion openings 46 are juxtaposed around the right end of the first screw 43. The third screw 47 is embedded in the right end of the first screw 43. The third screw 47 pushes the right end of the first screw 43 outward.

The first connection cover 41 has second sealing rings 48 respectively provided in parallel on the inner and outer sides thereof. The second sealing ring 48 is respectively attached to the other end of the hydraulic cylinder 1 and the outer surface of the hydraulic rod 2.

Preferably, the second seal 48 is a rubber seal. The second packing 48 is wound around the right side of the outer surface of the first connection cap 41 and the inner surface of the first connection cap 41, respectively. The left end of the hydraulic cylinder 1 can be sealed by a second sealing ring 48.

By tightening the second screw 44, the second connection cap 42 presses the first seal ring 45, so that the first seal ring 45 can be closely attached to the hydraulic rod 2. The first screw 43 can be firmly fixed by screwing the first screw 43 into the connecting member 12, tightening the third screw 47, and pushing the first screw 43 to expand by the third screw 47, so that the second end cap 4 can firmly seal the hydraulic cylinder 1.

The connection pipe 6 includes a flow-through elbow 61 communicating with the second flow port 8, a flow-through straight pipe 62 communicating with the flow-through elbow 61, and a fixing member 63 pushing the flow-through straight pipe 62 close to the flow-through elbow 61. The mount 63 is rotatably provided on the flow straight pipe 62. The fixture 63 is threadedly connected to the flow-through elbow 61.

Preferably, the flow elbow 61 is L-shaped. The lower end of the flow-through elbow 61 communicates with the second flow port 8. The right end of the flow-through bent pipe 61 communicates with the left end of the flow-through straight pipe 62. The flow straight pipe 62 is provided in the left-right direction. The mount 63 is rotatably provided at the left end of the flow straight pipe 62. The right end of the fixing member 63 is rotatably connected to the left end of the flow straight pipe 62. The left end of the fixing member 63 is screwed to the right end of the flow elbow 61.

A first sealing block 64 is juxtaposed around one end of the flow-through elbow 61 adjacent the flow-through straight tube 62. A second sealing block 65 is juxtaposed around the end of the flow-through straight tube 62 adjacent the flow-through elbow 61. The first seal blocks 64 are embedded between adjacent second seal blocks 65. The second seal blocks 65 are embedded between adjacent first seal blocks 64.

A first seal block 64 is disposed around the right end of the flow-through elbow 61. A second seal block 65 is disposed around the left end of the flow-through straight tube 62. The right end of the first seal block 64 is embedded between the adjacent second seal blocks 65. The left end of the second seal block 65 is embedded between the adjacent first seal blocks 64.

When the fixing piece 63 is screwed down, the fixing piece 63 pulls the circulation straight pipe 62 leftwards, and the first sealing block 64 and the second sealing block 65 are attached to each other, so that the circulation bent pipe 61 and the circulation straight pipe 62 can be connected in a sealing mode, and leakage of oil is avoided.

The piston 5 comprises a plug body 51 sleeved on the hydraulic rod 2, a locking piece 52 pressing the plug body 51 and a third sealing ring 53 separating the hydraulic cylinder 1. The locking member 52 is screwed to the hydraulic rod 2. The third seal ring 53 is juxtaposed on the plug body 51. A tapered surface is cut around the locking member 52. The plug body 51 is provided with a tapered groove 54 which fits the tapered surface. Retaining member 52 is disposed within tapered slot 54.

Preferably, the third seal 53 is a rubber seal. The plug body 51 is sleeved on the right end of the outer surface of the hydraulic rod 2. The locker 52 is screw-coupled to the right end of the hydraulic rod 2. A third sealing ring 53 is provided around the outer surface of the plug body 51.

A tapered surface is formed around the left end of the outer surface of the locker 52. The right end of the plug body 51 is provided with a conical groove 54 attached to the conical surface. When retaining member 52 is positioned within tapered slot 54, the tapered surface engages the inner surface of tapered slot 54.

When the locking member 52 is tightened, the locking member 52 presses the plug body 51, and the locking member 52 firmly fixes the plug body 51. The interior of the hydraulic cylinder 1 can be partitioned by a third seal 53. The locking piece 52 can stably press the plug body 51 through the conical surface, and abrasion of the hydraulic cylinder 1 caused by looseness of the plug body 51 is avoided.

The first end cap 3 includes a sealing cap 31 provided at one end of the hydraulic cylinder 1, a fourth screw 32 fixing the sealing cap 31, a boss 33 provided around the sealing cap 31, and a fourth packing 34 sealing one end of the hydraulic cylinder 1. The boss 33 is fitted into one end of the hydraulic cylinder 1. A fourth seal ring 34 is disposed around the outer surface of the boss 33. The fourth screw 32 is passed through the seal cover 31 and the boss 33, respectively, and the fourth screw 32 is screwed into the hydraulic cylinder 1.

Preferably, the fourth seal ring 34 is a rubber seal ring. Preferably, the boss 33 is trapezoidal. The seal cap 31 is provided at the right end of the hydraulic cylinder 1. The boss 33 is provided around the left surface of the sealing cover 31. The fourth seal rings 34 are juxtaposed around the inner and outer sides of the boss 33. The right end of the boss 33 is connected to the left end of the sealing cover 31. The left end of the boss 33 is fitted into the right end of the hydraulic cylinder 1. After the fourth screw 32 passes through the sealing cover 31 and the boss 33, the left end of the fourth screw 32 is screwed into the right end of the hydraulic cylinder 1.

The boss 33 is embedded into the right end of the hydraulic cylinder 1, the fourth sealing ring 34 seals the right end of the hydraulic cylinder 1, and the fourth screw 32 fixes the first end cover 3, so that the first end cover 3 can firmly seal the right end of the hydraulic cylinder 1.

When the hydraulic rod 2 needs to be extended, oil enters the right end in the hydraulic cylinder 1 from the first flow port 7. The oil liquid at the left end in the hydraulic cylinder 1 flows into the connecting pipe 6 through the second flow port 8. Oil at the right end in the hydraulic cylinder 1 pushes the hydraulic rod 2 and the piston 5 to move from right to left along the hydraulic cylinder 1. The oil liquid in the connecting pipe 6 flows into the right end of the hydraulic cylinder 1 after flowing through the first flow port 7 through the reversing valve. The oil liquid at the left end in the hydraulic cylinder 1 is utilized through the connecting pipe 6, and the moving speed of the hydraulic rod 2 and the piston 5 is accelerated.

When the hydraulic rod 2 needs to be contracted, oil flows into the connecting pipe 6 through the reversing valve. The oil in the connecting pipe 6 flows into the left end of the hydraulic cylinder 1 through the second flow port 8. The oil at the left end in the hydraulic cylinder 1 pushes the hydraulic rod 2 and the piston 5 to move from left to right along the hydraulic cylinder 1. The oil at the right end in the hydraulic cylinder 1 is discharged through the first flow port 7.

In the present embodiment, the first seal ring 45 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present embodiment, the second seal ring 48 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present embodiment, the third seal ring 53 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present embodiment, the fourth seal ring 34 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present specification, terms such as "L-shaped" and "trapezoidal" are used, and these terms are not exactly "L-shaped" and "trapezoidal" and may be in a state of "substantially L-shaped" and "substantially trapezoidal" within a range in which the functions thereof can be exerted.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.

Claims

1. The utility model provides a quick pneumatic cylinder of differential connection formula which characterized in that: the hydraulic cylinder comprises a connecting pipe (6), a hydraulic cylinder (1), a hydraulic rod (2) movably arranged in the hydraulic cylinder (1), a first end cover (3) for sealing one end of the hydraulic cylinder (1), a second end cover (4) for sealing the other end of the hydraulic cylinder (1), a piston (5) for separating the interior of the hydraulic cylinder (1), a first flow port (7) communicated with one end of the interior of the hydraulic cylinder (1) and a second flow port (8) communicated with the other end of the interior of the hydraulic cylinder (1); the hydraulic rod (2) penetrates through the second end cover (4); the piston (5) is arranged on the hydraulic rod (2); the first flow port (7) is formed in the first end cover (3); the second flow port (8) is formed in the hydraulic cylinder (1); the connecting pipe (6) is communicated with the second flow port (8).

2. The differentially connected hydraulic ram of claim 1, wherein: the hydraulic cylinder (1) comprises a cylinder body (11) and a connecting piece (12) in threaded connection with the other end of the hydraulic cylinder (1); the second end cover (4) is connected to the connecting piece (12); the second end cover (4) is embedded into the other end of the hydraulic cylinder (1).

3. The differentially connected hydraulic ram of claim 2, wherein: the second end cover (4) comprises a first sealing ring (45) for sealing the hydraulic rod (2), a first connecting cover (41) connected to the connecting piece (12), a second connecting cover (42) for pressing the first sealing ring (45), a first screw (43) for fixing the first connecting cover (41) and a second screw (44) for fixing the second connecting cover (42); the first screw (43) penetrates through the first connecting cover (41), and the first screw (43) is screwed into the connecting piece (12); the second screw (44) penetrates the second connection cover (42), and the second screw (44) is screwed into the first connection cover (41).

4. The differentially connected hydraulic ram of claim 3, wherein: expansion openings (46) are arranged around the first screw (43) in parallel; the connecting piece (12) is in threaded connection with a third screw (47) which pushes the first screw (43) to expand; the third screw (47) is embedded in one end of the first screw (43) screwed into the connecting piece (12).

5. The differentially connected hydraulic ram of claim 4, wherein: the inner side and the outer side of the first connecting cover (41) are respectively provided with a second sealing ring (48) in parallel; the second sealing ring (48) is respectively attached to the other end in the hydraulic cylinder (1) and the outer surface of the hydraulic rod (2).

6. The differentially connected hydraulic ram of claim 1, wherein: the connecting pipe (6) comprises a circulation bent pipe (61) communicated with the second flow port (8), a circulation straight pipe (62) communicated with the circulation bent pipe (61), and a fixing piece (63) for pushing the circulation straight pipe (62) to be close to the circulation bent pipe (61); the fixing piece (63) is rotatably arranged on the flow straight pipe (62); the fixing piece (63) is in threaded connection with the flow-through elbow (61).

7. The differentially connected hydraulic ram of claim 6, wherein: a first sealing block (64) is arranged around one end of the flow-through bent pipe (61) close to the flow-through straight pipe (62) in parallel; a second sealing block (65) is arranged around one end of the flow straight pipe (62) close to the flow bent pipe (61) in parallel; the first sealing blocks (64) are embedded between the adjacent second sealing blocks (65); the second seal blocks (65) are embedded between adjacent first seal blocks (64).

8. The differentially connected hydraulic ram of claim 1, wherein: the piston (5) comprises a plug body (51) sleeved on the hydraulic rod (2), a locking piece (52) pressing the plug body (51) and a third sealing ring (53) separating the interior of the hydraulic cylinder (1); the locking piece (52) is in threaded connection with the hydraulic rod (2); the third sealing rings (53) are arranged on the plug body (51) in parallel; a conical surface is arranged around the locking piece (52); the plug body (51) is provided with a conical groove (54) attached to the conical surface; the locking member (52) is arranged in the conical groove (54).

9. The differentially connected hydraulic ram of claim 1, wherein: the first end cover (3) comprises a sealing cover (31) arranged at one end of the hydraulic cylinder (1), a fourth screw (32) for fixing the sealing cover (31), a boss (33) arranged around the sealing cover (31) and a fourth sealing ring (34) for sealing one end of the hydraulic cylinder (1); the boss (33) is embedded into one end of the hydraulic cylinder (1); the fourth sealing ring (34) is arranged around the outer surface of the boss (33); the fourth screw (32) penetrates through the sealing cover (31) and the boss (33) respectively, and the fourth screw (32) is screwed into the hydraulic cylinder (1).