Guide sleeve of hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinder guide sleeves, in particular to a hydraulic oil cylinder guide sleeve which can play a role in buffering protection on the guide sleeve, prevent the guide sleeve from being impacted by a piston rod, enable the guide sleeve to be matched with a cylinder body and the piston rod more tightly, and improve the sealing performance between the guide sleeve and the cylinder body and between the guide sleeve and the piston rod. A guide sleeve is integrally and fixedly arranged at the bottom of the guide sleeve connecting base, piston rod holes are formed in the guide sleeve connecting base and the guide sleeve in a penetrating mode, four sets of threaded through holes are formed in the top end of the guide sleeve connecting base in an annular array mode, hexagon socket screws are installed on the four sets of threaded through holes in a threaded mode, and the top end of a buffer rubber ring is fixedly connected with the bottom end of the guide sleeve. The top ends of the four sets of ejector rods are fixedly connected with trapezoid ejector blocks, the outer side slopes of the four sets of trapezoid sliding blocks make contact with the inner side slopes of the four sets of trapezoid ejector blocks respectively, the inner sides of the four sets of trapezoid sliding blocks are fixedly connected with rubber rings, the four sets of rubber rings are arranged on the four sets of ejector columns in a sleeving mode respectively, and the inner sides of the four sets of rubber rings are connected with the inner wall of the buffer cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinder guide sleeves, in particular to a hydraulic oil cylinder guide sleeve. Background Art

[0002] The hydraulic cylinder guide sleeve is an indispensable component in the hydraulic cylinder. The guide sleeve supports and ensures the coaxiality of the piston rod and the cylinder barrel. During the extension of the hydraulic cylinder piston rod, it can prevent the piston rod from being pushed out of the cylinder body.

[0003] During the movement of the hydraulic cylinder piston rod, the guide sleeve needs to withstand the impact of the piston movement. The bottom of the existing hydraulic cylinder guide sleeve is mostly unable to buffer the movement of the piston rod. When the piston rod moves, it causes an impact on the guide sleeve, which easily makes the fit between the guide sleeve and the cylinder body and the piston rod loose, affecting the sealing between the guide sleeve and the cylinder body and the piston rod. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a hydraulic cylinder guide sleeve that can provide buffering protection for the guide sleeve, prevent the guide sleeve from being impacted by the piston rod, make the fit between the guide sleeve, the cylinder body and the piston rod tighter, and improve the sealing between the guide sleeve, the cylinder body and the piston rod.

[0005] Technical Solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic cylinder guide sleeve, including a guide sleeve structure and a buffer structure, the guide sleeve structure includes a guide sleeve connecting seat, a guide sleeve is fixedly provided with an integral guide sleeve at the bottom of the guide sleeve connecting seat, a piston rod hole is penetrated through the guide sleeve connecting seat and the guide sleeve, four groups of threaded through holes are arranged in an annular array at the top of the guide sleeve connecting seat, and hexagon socket bolts are screwed on the four groups of threaded through holes, an outer sealing gasket is sleeved on the guide sleeve, and the top of the outer sealing gasket contacts the bottom end of the guide sleeve connecting seat, an inner sealing groove is provided on the wall of the piston rod hole of the guide sleeve, an inner sealing ring is clamped on the inner sealing groove, the buffer structure includes a buffer rubber ring, the top of the buffer rubber ring is fixedly connected to the bottom end of the guide sleeve, and four groups of buffer cavities are arranged in an annular array inside the guide sleeve, The bottom end of the guide sleeve is provided with four groups of sliding holes communicated with the buffer cavity, the bottom ends of the four groups of sliding holes are all provided with buffer grooves, the four groups of sliding holes are all slidably provided with push rods, the bottom ends of the four groups of push rods are all fixedly connected with top plates, the four groups of push rods are all sleeved with buffer springs, the two ends of the buffer springs are respectively connected with the buffer grooves and the top ends of the top plates, the top ends of the four groups of push rods are all fixedly connected with trapezoidal top blocks, the four groups of trapezoidal top blocks slide in the four groups of buffer cavities respectively, the four groups of buffer cavities are all provided with top holes connected with the inner sealing grooves, the four groups of top holes are all slidably provided with push columns, the outer sides of the four groups of top columns are all fixedly connected with trapezoidal sliders, the outer inclined surfaces of the four groups of trapezoidal sliders are respectively in contact with the inner inclined surfaces of the four groups of trapezoidal top blocks, the inner sides of the four groups of trapezoidal sliders are all fixedly connected with rubber rings, the four groups of rubber rings are respectively sleeved on the four groups of top columns, and the inner sides of the four groups of rubber rings are all connected to the inner wall of the buffer cavity.

[0007] Preferably, two groups of external sealing grooves are provided on the outer wall of the guide sleeve, and sealing rubber rings are clamped in both groups of external sealing grooves.

[0008] Preferably, gaskets are sleeved on the four groups of hexagon socket bolts.

[0009] Preferably, countersunk holes are provided at the top ends of the four groups of threaded through holes.

[0010] Preferably, the buffer rubber ring is made of polyurethane material.

[0011] Preferably, the guide sleeve connecting seat and the guide sleeve are both made of stainless steel.

[0012] Compared with the prior art, the utility model has the following beneficial effects: when in use, a threaded mounting hole matching the inner hexagonal bolt is provided on the cylinder body, and a mounting groove matching the guide sleeve connecting seat is provided on the top of the cylinder body. When installing, the guide sleeve connecting seat is buckled in the mounting groove, so that the outer wall of the guide sleeve contacts the inner wall of the cylinder body, and the piston rod slides through the piston rod hole, and the guide sleeve connecting seat is fixed to the mounting groove at the top of the cylinder body by the inner hexagonal bolt. The sealing between the guide sleeve and the cylinder body is improved by the outer sealing gasket, and the piston rod squeezes the inner sealing groove, so that the inner sealing groove tightly embraces the piston rod, thereby improving the sealing between the guide sleeve and the piston rod. When the piston rod moves, when the piston rod moves upward, the piston rod first contacts the top plate, and the top plate pushes the top rod to slide upward, so that The buffer spring is compressed to play a preliminary buffering role, and then the piston rod is against the buffer rubber ring, and the buffer rubber ring is compressed, which plays a secondary buffering role for the piston rod, and during the second buffering process, the piston rod reaches the maximum stroke. During this process, the piston rod pushes the push rod to slide upward through the top plate, so that the push rod pushes the trapezoidal slider to slide inward through the trapezoidal top block, and then the trapezoidal slider pushes the push column to slide inward, so that the rubber ring is compressed, and the push column generates an inward radial thrust on the inner sealing ring, further strengthening the tightness of the inner sealing ring around the piston rod, thereby playing a buffering protection for the guide sleeve, preventing the guide sleeve from being impacted by the piston rod, making the fit between the guide sleeve and the cylinder body and the piston rod tighter, and improving the sealing between the guide sleeve and the cylinder body and the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 2 It is a front structural schematic diagram of the utility model;

[0015] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0016] Figure 4 It is a schematic diagram of the bottom axonometric structure of the guide sleeve connecting seat and the guide sleeve in the utility model;

[0017] Figure 5 This utility model Figure 4 A front view structural diagram of

[0018] Figure 6 It is a schematic diagram of the cross-sectional structure of the utility model when installed with the cylinder body and the piston rod;

[0019] Markings in the attached drawings: 1. guide sleeve connecting seat; 2. guide sleeve; 3. threaded through hole; 4. hexagon socket bolt; 5. external sealing gasket; 6. internal sealing groove; 7. internal sealing ring; 8. buffer rubber ring; 9. push rod; 10. push plate; 11. buffer spring; 12. trapezoidal push block; 13. push column; 14. trapezoidal slider; 15. external sealing groove; 16. sealing rubber ring; 17. gasket; 18. countersunk hole; 19. rubber ring. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] Example 1

[0022] See also Figure 1-Figure 6The utility model is a hydraulic cylinder guide sleeve, the bottom of the guide sleeve connecting seat 1 is fixed with a guide sleeve 2 in an integrated manner, the guide sleeve connecting seat 1 and the guide sleeve 2 are penetrated with a piston rod hole, the top of the guide sleeve connecting seat 1 is provided with four groups of threaded through holes 3, the four groups of threaded through holes 3 are all screwed with hexagon socket bolts 4, an outer sealing gasket 5 is sleeved on the guide sleeve 2, and the top of the outer sealing gasket 5 contacts the bottom end of the guide sleeve connecting seat 1, an inner sealing groove 6 is provided on the piston rod hole wall of the guide sleeve 2, an inner sealing ring 7 is clamped on the inner sealing groove 6, and the top of the buffer rubber ring 8 is fixedly connected to the bottom end of the guide sleeve 2, the inner annular array of the guide sleeve 2 is provided with four groups of buffer cavities, the bottom end of the guide sleeve 2 is provided with four groups of sliding holes communicating with the buffer cavity, the bottom ends of the four groups of sliding holes are provided with buffer sinks, and the four groups of sliding holes are provided with buffer sinks. A push rod 9 is slidably provided on the hole, and a top sheet 10 is fixedly connected to the bottom end of the four groups of push rods 9. A buffer spring 11 is sleeved on the four groups of push rods 9. The two ends of the buffer spring 11 are respectively connected to the buffer sink and the top of the top sheet 10. The tops of the four groups of push rods 9 are fixedly connected with a trapezoidal top block 12. The four groups of trapezoidal top blocks 12 slide in the four groups of buffer cavities respectively. The four groups of buffer cavities are all provided with a top hole connected to the inner sealing groove 6. A top column 13 is slidably provided in the four groups of top holes. The outer sides of the four groups of top columns 13 are fixedly connected with a trapezoidal slider 14. The outer inclined surfaces of the four groups of trapezoidal sliders 14 are respectively in contact with the inner inclined surfaces of the four groups of trapezoidal top blocks 12. The inner sides of the four groups of trapezoidal sliders 14 are fixedly connected with rubber rings 19. The four groups of rubber rings 19 are respectively sleeved on the four groups of top columns 13, and the inner sides of the four groups of rubber rings 19 are connected to the inner wall of the buffer cavity.When in use, the cylinder body is provided with a threaded mounting hole matching the hexagon socket bolt 4, and the top of the cylinder body is provided with a mounting groove matching the guide sleeve connecting seat 1. When installing, the guide sleeve connecting seat 1 is buckled into the mounting groove so that the outer wall of the guide sleeve 2 contacts the inner wall of the cylinder body, and the piston rod slides through the piston rod hole, and the guide sleeve connecting seat 1 is fixed to the mounting groove at the top of the cylinder body by the hexagon socket bolt 4. The sealing between the guide sleeve and the cylinder body is improved by the external sealing gasket 5, and the piston rod squeezes the inner sealing groove 6 so that the inner sealing groove 6 tightly embraces the piston rod, thereby improving the sealing between the guide sleeve and the piston rod. When the piston rod moves, when the piston rod moves upward, the piston rod first contacts the top plate 10, and the top plate 10 pushes the top rod 9 to slide upward, so that the buffer spring 11 is compressed, which plays a preliminary role. The piston rod then contacts the buffer rubber ring 8, and the buffer rubber ring 8 is compressed, which plays a secondary buffering role for the piston rod. In the second buffering process, the piston rod reaches the maximum stroke. In this process, the piston rod pushes the top rod 9 to slide upward through the top sheet 10, so that the top rod 9 pushes the trapezoidal slider 14 to slide inward through the trapezoidal top block 12, and then the trapezoidal slider 14 pushes the top column 13 to slide inward, so that the rubber ring 19 is compressed, and the top column 13 generates an inward radial thrust on the inner sealing ring 7, further strengthening the tightness of the inner sealing ring 7 around the piston rod, thereby playing a buffering protection role for the guide sleeve, preventing the guide sleeve from being impacted by the piston rod, making the guide sleeve more closely matched with the cylinder body and the piston rod, and improving the sealing performance between the guide sleeve, the cylinder body and the piston rod. ;

[0023] Example 2

[0024] See also Figure 1-Figure 6The utility model is a guide sleeve of a hydraulic cylinder. The bottom of the guide sleeve connecting seat 1 is fixed with a guide sleeve 2 in an integrated manner. The guide sleeve connecting seat 1 and the guide sleeve 2 are penetrated with a piston rod hole. The top of the guide sleeve connecting seat 1 is provided with four groups of threaded through holes 3 in an annular array. The four groups of threaded through holes 3 are all screwed with hexagon socket bolts 4. An outer sealing gasket 5 is sleeved on the guide sleeve 2, and the top of the outer sealing gasket 5 contacts the bottom end of the guide sleeve connecting seat 1. Two groups of outer sealing grooves 15 are provided on the outer wall of the guide sleeve 2. Sealing rubber rings 16 are clamped in the two groups of outer sealing grooves 15. An inner sealing groove 6 is provided on the piston rod hole wall of the guide sleeve 2. An inner sealing ring 7 is clamped on the inner sealing groove 6. The top of the buffer rubber ring 8 is fixedly connected to the bottom end of the guide sleeve 2. Four groups of buffer cavities are provided in an annular array inside the guide sleeve 2. The bottom end of the guide sleeve 2 is provided with four groups of sliding Holes, buffer grooves are provided at the bottom ends of the four groups of sliding holes, push rods 9 are slidably provided on the four groups of sliding holes, and top sheets 10 are fixedly connected to the bottom ends of the four groups of push rods 9. Buffer springs 11 are sleeved on the four groups of push rods 9, and the two ends of the buffer springs 11 are respectively connected to the buffer grooves and the top ends of the top sheets 10. The top ends of the four groups of push rods 9 are fixedly connected to trapezoidal top blocks 12, and the four groups of trapezoidal top blocks 12 slide in the four groups of buffer cavities respectively. The four groups of buffer cavities are all provided with top holes connected to the inner sealing grooves 6, and top columns 13 are slidably provided in the four groups of top holes. The outer sides of the four groups of top columns 13 are fixedly connected to trapezoidal sliders 14, and the outer inclined surfaces of the four groups of trapezoidal sliders 14 are respectively in contact with the inner inclined surfaces of the four groups of trapezoidal top blocks 12, and the inner sides of the four groups of trapezoidal sliders 14 are fixedly connected to rubber rings 19, and the four groups of rubber rings 19 are respectively sleeved on the four groups of top columns 13, and the inner sides of the four groups of rubber rings 19 are connected to the inner wall of the buffer cavity;When in use, the cylinder body is provided with a threaded mounting hole matching the hexagon socket bolt 4, and the top of the cylinder body is provided with a mounting groove matching the guide sleeve connecting seat 1. When installing, the guide sleeve connecting seat 1 is buckled into the mounting groove so that the outer wall of the guide sleeve 2 contacts the inner wall of the cylinder body, and the piston rod slides through the piston rod hole, and the guide sleeve connecting seat 1 is fixed to the mounting groove at the top of the cylinder body by the hexagon socket bolt 4. The sealing between the guide sleeve and the cylinder body is improved by the external sealing gasket 5, and the piston rod squeezes the inner sealing groove 6 so that the inner sealing groove 6 tightly embraces the piston rod, thereby improving the sealing between the guide sleeve and the piston rod. When the piston rod moves, when the piston rod moves upward, the piston rod first contacts the top plate 10, and the top plate 10 pushes the top rod 9 to slide upward, so that the buffer spring 11 is compressed, which plays a preliminary role. The piston rod then contacts the buffer rubber ring 8, and the buffer rubber ring 8 is compressed, which plays a secondary buffering role for the piston rod. In the second buffering process, the piston rod reaches the maximum stroke. In this process, the piston rod pushes the top rod 9 to slide upward through the top sheet 10, so that the top rod 9 pushes the trapezoidal slider 14 to slide inward through the trapezoidal top block 12, and then the trapezoidal slider 14 pushes the top column 13 to slide inward, so that the rubber ring 19 is compressed, and the top column 13 generates an inward radial thrust on the inner sealing ring 7, further strengthening the tightness of the inner sealing ring 7 around the piston rod, thereby playing a buffering protection role for the guide sleeve, preventing the guide sleeve from being impacted by the piston rod, making the guide sleeve more closely matched with the cylinder body and the piston rod, and improving the sealing performance between the guide sleeve, the cylinder body and the piston rod. ;

[0025] The outer wall of the guide sleeve 2 is provided with two groups of external sealing grooves 15, and sealing rubber rings 16 are clamped in the two groups of external sealing grooves 15; by providing the external sealing grooves 15 and the sealing rubber rings 16, when the guide sleeve connecting seat 1 and the guide sleeve 2 are installed, the sealing rubber rings 16 are squeezed by the cylinder body, which can further enhance the sealing performance of the fit between the guide sleeve and the cylinder body.

[0026] Washers 17 are sleeved on the four groups of hexagon socket bolts 4. By providing the washers 17, the hexagon socket bolts 4 can be more secure when tightened to avoid loosening.

[0027] The tops of the four groups of threaded through holes 3 are all provided with countersunk holes 18; by providing the countersunk holes 18, when installing the guide sleeve connecting seat 1, the nuts on the hexagon socket bolts 4 can be sunk into the countersunk holes 18, so that after the guide sleeve connecting seat 1 is installed, the nuts of the hexagon socket bolts 4 are prevented from protruding, thereby improving the aesthetics.

[0028] The buffer rubber ring 8 is made of polyurethane material; the polyurethane material is more durable than rubber material, and the impact resistance and compression resistance of the buffer rubber ring 8 are effectively enhanced.

[0029] The guide sleeve connecting seat 1 and the guide sleeve 2 are both made of stainless steel. By adopting stainless steel, the surfaces of the guide sleeve connecting seat 1 and the guide sleeve 2 can be more shiny and less prone to rust.

[0030] The utility model provides a guide sleeve of a hydraulic oil cylinder, and its working principle is that when in use, a sealing rubber ring 16 is clamped on the outer sealing groove 15 of the guide sleeve 2, a threaded mounting hole matching with the inner hexagonal bolt 4 is provided on the cylinder body, and a mounting groove matching with the guide sleeve connecting seat 1 is provided on the top of the cylinder body. When installing, the guide sleeve connecting seat 1 is buckled and installed in the mounting groove, so that the outer wall of the guide sleeve 2 contacts the inner wall of the cylinder body, and the piston rod slides through the piston rod hole, and the guide sleeve connecting seat 1 is fixed to the mounting groove at the top of the cylinder body by the inner hexagonal bolt 4. The sealing between the guide sleeve and the cylinder body is improved by the outer sealing gasket 5 and the sealing rubber ring 16, and the piston rod squeezes the inner sealing groove 6, so that the inner sealing groove 6 tightly embraces the piston rod, thereby improving the sealing between the guide sleeve and the piston rod. When the piston rod moves, when the piston rod moves upward, the piston rod first contacts the top plate 10, and pushes the top rod 9 to slide upward through the top plate 10, so that the buffer spring 11 is compressed, which plays a preliminary buffering role, and then the piston rod contacts the buffer rubber ring 8 again, and the buffer rubber ring 8 is compressed, which plays a secondary buffering role for the piston rod, and in the second buffering process, the piston rod reaches the maximum stroke. During this process, the piston rod pushes the top rod 9 to slide upward through the top plate 10, so that the top rod 9 pushes the trapezoidal slider 14 to slide inward through the trapezoidal top block 12, and then the trapezoidal slider 14 pushes the top column 13 to slide inward, so that the rubber ring 19 is compressed, and the top column 13 generates an inward radial thrust on the inner sealing ring 7, further strengthening the tightness of the inner sealing ring 7 around the piston rod.

[0031] The utility model provides a hydraulic cylinder guide sleeve, and its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic cylinder guide sleeve, characterized in that: It also includes a guide sleeve structure and a buffer structure; A guide sleeve structure, the guide sleeve structure comprising a guide sleeve connecting seat (1), a guide sleeve (2) is integrally fixedly provided at the bottom of the guide sleeve connecting seat (1), a piston rod hole is penetrated through the guide sleeve connecting seat (1) and the guide sleeve (2), four groups of threaded through holes (3) are provided in an annular array at the top of the guide sleeve connecting seat (1), and hexagon socket bolts (4) are screwed on the four groups of threaded through holes (3), an outer sealing gasket (5) is sleeved on the guide sleeve (2), and the top of the outer sealing gasket (5) contacts the bottom of the guide sleeve connecting seat (1), an inner sealing groove (6) is provided on the piston rod hole wall of the guide sleeve (2), and an inner sealing ring (7) is clamped on the inner sealing groove (6); The buffer structure comprises a buffer rubber ring (8), the top end of the buffer rubber ring (8) is fixedly connected to the bottom end of the guide sleeve (2), the guide sleeve (2) is provided with four groups of buffer cavities in an annular array inside, the bottom end of the guide sleeve (2) is provided with four groups of sliding holes communicating with the buffer cavities, the bottom ends of the four groups of sliding holes are all provided with buffering grooves, the four groups of sliding holes are all slidably provided with push rods (9), the bottom ends of the four groups of push rods (9) are all fixedly connected with top sheets (10), the four groups of push rods (9) are all sleeved with buffer springs (11), the two ends of the buffer springs (11) are respectively connected to the buffering groove and the top end of the top sheet (10), and the top ends of the four groups of push rods (9) are all A trapezoidal top block (12) is fixedly connected, and four groups of trapezoidal top blocks (12) slide in four groups of buffer chambers respectively. Top holes are provided in the four groups of buffer chambers and are connected to the inner sealing groove (6). Top pillars (13) are slidably provided in the four groups of top holes. Trapezoidal sliders (14) are fixedly connected to the outside of the four groups of top pillars (13). The outer inclined surfaces of the four groups of trapezoidal sliders (14) are in contact with the inner inclined surfaces of the four groups of trapezoidal top blocks (12) respectively. Rubber rings (19) are fixedly connected to the inside of the four groups of trapezoidal sliders (14). The four groups of rubber rings (19) are respectively sleeved on the four groups of top pillars (13). The inner sides of the four groups of rubber rings (19) are connected to the inner wall of the buffer chamber.

2. A hydraulic cylinder guide sleeve as claimed in claim 1, characterized in that: Two groups of external sealing grooves (15) are arranged on the outer wall of the guide sleeve (2), and sealing rubber rings (16) are clamped in the two groups of external sealing grooves (15).

3. A hydraulic cylinder guide sleeve as claimed in claim 2, characterized in that: Washers (17) are sleeved on the four groups of hexagon socket bolts (4).

4. A hydraulic cylinder guide sleeve as claimed in claim 3, characterized in that: The top ends of the four groups of threaded through holes (3) are all provided with countersunk holes (18).

5. A hydraulic cylinder guide sleeve as claimed in claim 4, characterized in that: The buffer rubber ring (8) is made of polyurethane material.

6. A hydraulic cylinder guide sleeve as claimed in claim 5, characterized in that: The guide sleeve connecting seat (1) and the guide sleeve (2) are both made of stainless steel.

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