Hydraulic oil cylinder with piston rod protection structure

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a piston rod protection structure, which comprises a cylinder body, a piston rod main body, a bearing plate, a telescopic rubber sleeve main body and a fastening connecting piece, a piston rod body is arranged in the cylinder body, a first supporting ring is fixedly arranged at the end of the cylinder body, and first positioning grooves are annularly formed in the end face of the cylinder body at equal intervals. A bearing plate is arranged at one end of the piston rod body. The telescopic rubber sleeve is mainly used in cooperation with the fastening connecting piece, on the basis that it is guaranteed that the telescopic rubber sleeve stably protects the piston rod, the telescopic rubber sleeve is convenient to disassemble and assemble, the corresponding connecting stability is achieved, and the protection work of the telescopic rubber sleeve cannot be affected; in addition, an auxiliary clamping frame, a heat dissipation hole groove and an auxiliary vent hole arranged in the fastening connecting piece are used in cooperation with an auxiliary through groove in the side of the connecting ring pipe, a certain heat dissipation auxiliary effect is achieved on the piston rod, and the protection performance of the piston rod is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and particularly to a hydraulic cylinder with a piston rod protection structure. Background Technique

[0002] A document with the publication number CN110630583A discloses a hydraulic cylinder protection device and an engineering vehicle. Its solution includes an airbag, a first slider, and a second slider; the airbag includes a first side and a second side; one end of the first slider is connected to one end of the first side of the airbag, and the other end of the first slider is slidably connected to the cylinder port flange along its circumference; one end of the second slider is connected to the other end of the first side of the airbag, and the other end of the second slider is slidably connected to the piston rod fixed flange along its circumference; the first slider and the second slider are used to adjust the area of the airbag along the circumference of the piston rod; when in use, as the piston rod fixed flange moves away from and approaches the cylinder port flange, the airbag is driven to expand and fold axially. When adjusting the positions of the first slider and the second slider in the first chute and the second chute, the area of the airbag along the circumference of the piston rod is changed, so as to adjust the protection area of the airbag.

[0003] For the protection of the piston rod in the above solution and the prior art hydraulic cylinders, generally, a dust-proof ring is arranged at the end of the cylinder body and used in cooperation with a telescopic rubber sleeve or a telescopic airbag to protect the piston rod from dust, and the telescopic rubber sleeve and the telescopic airbag also have a certain buffering and protection effect; one end of the existing telescopic rubber sleeve is arranged at the end of the cylinder body, and the other end is arranged on the bearing part on the piston rod. On the one hand, its fixing method is relatively inconvenient to disassemble, and some use a detachable method, but its connection stability cannot be well guaranteed; moreover, the telescopic rubber sleeve wraps and protects the extended piston rod, which will affect its heat dissipation, and may not be worth the loss. Therefore, further improvement and optimization are needed.

[0004] Therefore, the present invention proposes a hydraulic cylinder with a piston rod protection structure to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydraulic cylinder with a piston rod protection structure to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A hydraulic cylinder with a piston rod protection structure includes a cylinder body, a piston rod main body, a bearing plate member, a telescopic rubber sleeve main body, and a fastening connecting member;

[0007] The piston rod main body is arranged in the cylinder body. A first support ring is fixedly arranged at the end of the cylinder body, and first positioning grooves are arranged equidistantly in a ring shape on the end face of the cylinder body;

[0008] One end of the piston rod body is provided with a bearing plate member;

[0009] A second support ring is fixedly arranged on the bottom side of the bearing plate member, and second positioning grooves are arranged annularly at equal intervals on the same side as the second support ring of the bearing plate member. The bearing plate member is fixedly connected to one end of the piston rod body through mounting screws;

[0010] One end of the telescopic rubber sleeve body is fixedly connected to the cylinder block through a fastening connecting member, and the other end of the telescopic rubber sleeve body is fixedly connected to the bearing plate member through a fastening connecting member.

[0011] Preferably, connecting ring pipes are symmetrically and fixedly arranged at both ends of the telescopic rubber sleeve body. Auxiliary through grooves are symmetrically arranged at the side positions of the connecting ring pipes, and positioning ring heads are fixedly arranged at the ends of the connecting ring pipes. A positioning plug is fixedly arranged on the end face of the positioning ring head.

[0012] Preferably, the positioning plugs are also arranged annularly at equal intervals on the end face of the positioning ring head, and the positioning plugs are arranged in corresponding positions and have the same number of sets as the first positioning grooves and the second positioning grooves. The positioning plugs are adaptively inserted into the first positioning grooves and are also adaptively inserted into the second positioning grooves.

[0013] Preferably, the fastening connecting member includes a fastening clamp, a connecting plate head, a mounting hole, an auxiliary clamping frame, a heat dissipation hole groove, an auxiliary ventilation hole and a locking structure; Connecting plate heads are symmetrically and fixedly arranged at both ends of the fastening clamp, and a mounting hole is arranged in the connecting plate head. The auxiliary clamping frame is fixedly arranged on the inner side wall of the fastening clamp, and heat dissipation hole grooves are arranged at equal intervals on the side wall of the auxiliary clamping frame. The auxiliary ventilation hole is arranged on the side wall of the fastening clamp, and the auxiliary ventilation hole is communicated with the auxiliary clamping frame.

[0014] Preferably, the auxiliary clamping frame and the auxiliary through groove are arranged in corresponding positions and have the same number of sets, and the auxiliary clamping frame is adaptively inserted into the auxiliary through groove.

[0015] Preferably, two of the fastening clamps are set as a group, and the fastening clamps are fixed through the arranged locking structure.

[0016] Preferably, the locking structure includes a connecting threaded column, a pull-connecting nut, an auxiliary ring opening, a locking screw and an internal thread fastening cap; The connecting threaded column passes through the mounting hole on the connecting plate head, and pull-connecting nuts are symmetrically threadedly connected to both ends of the connecting threaded column.

[0017] Preferably, auxiliary ring openings are fixedly arranged at equal intervals on one end side of the pull-connecting nut. The locking screw passes through one of the auxiliary ring openings, and the locking screw is threadedly connected to the internal thread fastening cap.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The hydraulic cylinder piston rod protection structure designed by the present invention mainly uses the telescopic rubber sleeve and the fastening connecting piece in cooperation. On the basis of ensuring the stable protection of the piston rod by the telescopic rubber sleeve, the disassembly and assembly of the telescopic rubber sleeve are convenient, and it has corresponding connection stability, which will not affect the protection work of the telescopic rubber sleeve; furthermore, the auxiliary clamping frame, heat dissipation hole groove, auxiliary ventilation hole provided in the fastening connecting piece cooperate with the auxiliary through groove on the side of the connecting ring pipe, which also has a certain auxiliary heat dissipation effect on the piston rod, further improving the protection performance of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the structure connection of the hydraulic cylinder of the present invention;

[0021] Figure 2 For the present invention Figure 1 A partially enlarged schematic view of the connection between the middle cylinder body and the piston rod main body structure;

[0022] Figure 3 For the present invention Figure 1 An enlarged schematic view of the connection of the end part of the telescopic rubber sleeve main body;

[0023] Figure 4 It is a bottom view of the structure connection of the hydraulic cylinder of the present invention;

[0024] Figure 5 For the present invention Figure 4 An enlarged schematic view of the connection of the end part of the telescopic rubber sleeve main body;

[0025] Figure 6 For the present invention Figure 4 An enlarged schematic view of the connection of the bearing plate structure;

[0026] Figure 7 It is an inner side schematic view of the connection of the fastening clamp structure of the present invention;

[0027] Figure 8 It is an outer side schematic view of the connection of the fastening clamp structure of the present invention;

[0028] Figure 9 It is a schematic view of the connection of the locking structure of the present invention.

[0029] In the figure: cylinder block 1, first support ring 11, first positioning groove 12, piston rod main body 2, bearing plate member 3, second support ring 31, mounting screw 32, second positioning groove 33, telescopic rubber sleeve main body 4, connecting ring pipe 41, auxiliary through groove 42, positioning ring head 43, positioning plug 44, fastening clamp 501, connecting plate head 502, mounting hole 503, auxiliary clamping frame 504, heat dissipation hole groove 505, auxiliary ventilation hole 506, connecting threaded column 601, tension connection nut 602, auxiliary ring opening 603, locking screw 604, internal thread fastening cap 605. Specific embodiments

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those of ordinary skill in the art without creative efforts in the embodiments of the present invention belong to the scope of protection of the present invention.

[0031] Embodiment 1: Please refer to Figures 1-9 , a hydraulic cylinder with a piston rod protection structure, including a cylinder block 1, a piston rod main body 2, a bearing plate member 3, a telescopic rubber sleeve main body 4 and a fastening connecting member.

[0032] Wherein, a piston rod main body 2 is arranged in the cylinder block 1, a first support ring 11 is fixedly arranged at the end of the cylinder block 1, and a first positioning groove 12 is arranged equidistantly and annularly on the end face of the cylinder block 1; a bearing plate member 3 is arranged at one end of the piston rod main body 2; a second support ring 31 is fixedly arranged on the bottom side of the bearing plate member 3, and a second positioning groove 33 is arranged equidistantly and annularly on the same side as the second support ring 31 of the bearing plate member 3, and the bearing plate member 3 is fixedly connected with one end of the piston rod main body 2 through a mounting screw 32;

[0033] One end of the telescopic rubber sleeve main body 4 is fixedly connected with the cylinder block 1 through a fastening connecting member, and the other end of the telescopic rubber sleeve main body 4 is fixedly connected with the bearing plate member 3 through a fastening connecting member; connecting ring pipes 41 are symmetrically fixedly arranged at both ends of the telescopic rubber sleeve main body 4, auxiliary through grooves 42 are symmetrically arranged at the side positions of the connecting ring pipes 41, and a positioning ring head 43 is fixedly arranged at the end of the connecting ring pipe 41, and a positioning plug 44 is fixedly arranged on the end face of the positioning ring head 43; the positioning plugs 44 are also arranged equidistantly and annularly on the end face of the positioning ring head 43, and the positioning plugs 44 are arranged at corresponding positions and in the same number as the first positioning groove 12 and the second positioning groove 33, and the positioning plugs 44 are adapted to be inserted into the first positioning groove 12 and are also adapted to be inserted into the second positioning groove 33.

[0034] For the connection between the telescopic rubber sleeve body 4 and the cylinder block 1, the telescopic rubber sleeve body 4 is sleeved on the piston rod body 2. Then, the positioning ring head 43 at one end of the telescopic rubber sleeve body 4 is press-fitted on the first support ring 11 at the end of the cylinder block 1. At the same time, the positioning plug 44 provided on the positioning ring head 43 is inserted into the first positioning groove 12, and then a fastening connection is carried out through the provided fastening connection member; for the other end of the telescopic rubber sleeve body 4, it is fixedly connected to the bearing plate member 3. The bearing plate member 3 is first fixed to the end of the piston rod body 2 through the mounting screws 32. Then, the positioning ring head 43 at the other end of the telescopic rubber sleeve body 4 is sleeved in the second support ring 31 on the bearing plate member 3, and the positioning plug 44 is inserted and positioned in the second positioning groove 33, and then a fastening connection is carried out through the fastening connection member.

[0035] The present invention mainly uses the provided telescopic rubber sleeve and the fastening connection member in cooperation. On the basis of ensuring the stable protection of the piston rod by the telescopic rubber sleeve, the disassembly and assembly of the telescopic rubber sleeve are convenient, and it has corresponding connection stability, without affecting the protection work of the telescopic rubber sleeve; furthermore, the auxiliary clamping frame 504, the heat dissipation hole groove 505, the auxiliary ventilation hole 506 provided in the fastening connection member cooperate with the auxiliary through groove 42 on the side of the connecting ring pipe 41, which also has a certain auxiliary heat dissipation effect on the piston rod.

[0036] Embodiment 2: On the basis of Embodiment 1, please refer to Figures 7-9 , the fastening connection member here includes a fastening clamp 501, a connecting plate head 502, a mounting hole 503, an auxiliary clamping frame 504, a heat dissipation hole groove 505, an auxiliary ventilation hole 506 and a locking structure; connecting plate heads 502 are symmetrically and fixedly arranged at both ends of the fastening clamp 501, mounting holes 503 are arranged in the connecting plate heads 502, the auxiliary clamping frame 504 is fixedly arranged on the inner side wall of the fastening clamp 501, and heat dissipation hole grooves 505 are equidistantly arranged on the side wall of the auxiliary clamping frame 504. The auxiliary ventilation hole 506 is arranged on the side wall of the fastening clamp 501, and the auxiliary ventilation hole 506 is communicated with the auxiliary clamping frame 504; the positions of the auxiliary clamping frame 504 and the auxiliary through groove 42 are corresponding and the number of sets is the same, and the auxiliary clamping frame 504 is adaptively inserted into the auxiliary through groove 42.

[0037] Two fastening clamps 501 here are set as a group, and the fastening clamps 501 are fixed through the set locking structure; the locking structure here includes a connecting threaded column 601, a tension connecting nut 602, an auxiliary ring 603, a locking screw 604, and an internal thread fastening cap 605; the connecting threaded column 601 passes through the mounting hole 503 on the connecting plate head 502, and tension connecting nuts 602 are symmetrically threadedly connected to both ends of the connecting threaded column 601; here, auxiliary rings 603 are equidistantly and fixedly arranged at one end side position of the tension connecting nut 602, the locking screw 604 passes through one of the auxiliary rings 603, and the locking screw 604 is threadedly connected to the internal thread fastening cap 605.

[0038] When using the fastening connector to fasten the end of the telescopic rubber sleeve body 4, first, the fastening clamp 501 is clamped on the side of the connecting ring pipe 41, and the auxiliary clamping frame 504 inside the fastening clamp 501 is inserted into the auxiliary through groove 42 on the side of the connecting ring pipe 41. Then, it is fastened through the cooperation of the connecting threaded column 601 and the tension connecting nut 602. The purpose of setting the auxiliary ring 603 on the side of the tension connecting nut 602 is, on the one hand, to facilitate locking the tension connecting nut 602 through the locking screw 604 and the internal thread fastening cap 605, that is, to further improve the connection stability between the tension connecting nut 602 and the connecting threaded column 601; on the other hand, it has an auxiliary effect on the rotation of the tension connecting nut 602, making its rotation more convenient.

[0039] After the auxiliary clamping frame 504 is inserted into the auxiliary through groove 42, for the heat inside the telescopic rubber sleeve body 4, it can be dissipated through the cooperation of the heat dissipation hole groove 505 and the auxiliary ventilation hole 506 on the auxiliary clamping frame 504, avoiding the influence on the piston rod due to the inability to dissipate the heat.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a piston rod protection structure, characterized in that: It comprises a cylinder body (1), a piston rod body (2), a bearing plate (3), a telescopic rubber sleeve body (4) and a fastening connector; A piston rod body (2) is arranged in the cylinder body (1), a first support ring (11) is fixedly arranged at the end of the cylinder body (1), and first positioning grooves (12) are arranged in an annular shape at equal intervals on the end surface of the cylinder body (1); A bearing plate (3) is provided at one end of the piston rod body (2); A second support ring (31) is fixedly arranged on the bottom side of the bearing plate (3), and a second positioning groove (33) is equidistantly arranged in an annular shape on the same side of the bearing plate (3) as the second support ring (31), and the bearing plate (3) is fixedly connected to one end of the piston rod body (2) by means of a mounting screw (32); One end of the telescopic rubber sleeve body (4) is fixedly connected to the cylinder body (1) via a fastening connector, and the other end of the telescopic rubber sleeve body (4) is fixedly connected to the bearing plate (3) via a fastening connector.

2. The hydraulic cylinder with a piston rod protection structure according to claim 1, characterized in that: Connecting ring tubes (41) are symmetrically fixedly provided at both ends of the telescopic rubber sleeve body (4), auxiliary through grooves (42) are symmetrically provided at the sides of the connecting ring tube (41), and a positioning ring head (43) is fixedly provided at the end of the connecting ring tube (41), and a positioning plug (44) is fixedly provided on the end surface of the positioning ring head (43).

3. The hydraulic cylinder with a piston rod protection structure according to claim 2, characterized in that: The positioning plugs (44) are also arranged in an annular shape at equal intervals on the end surface of the positioning ring head (43), and the positioning plugs (44) are arranged at corresponding positions and in the same number of groups as the first positioning groove (12) and the second positioning groove (33), and the positioning plugs (44) are adapted to be plugged in with the first positioning groove (12) and the second positioning groove (33).

4. The hydraulic cylinder with a piston rod protection structure according to claim 1, characterized in that: The fastening connector comprises a fastening clamp (501), a connecting plate head (502), a mounting hole (503), an auxiliary clamp frame (504), a heat dissipation hole groove (505), an auxiliary ventilation hole (506) and a locking structure; the connecting plate heads (502) are symmetrically fixedly arranged at both ends of the fastening clamp (501), the connecting plate head (502) is provided with a mounting hole (503), the auxiliary clamp frame (504) is fixedly arranged on the inner side wall of the fastening clamp (501), and the heat dissipation hole grooves (505) are equidistantly arranged on the side wall of the auxiliary clamp frame (504), the auxiliary ventilation hole (506) is arranged on the side wall of the fastening clamp (501), and the auxiliary ventilation hole (506) is connected to the auxiliary clamp frame (504).

5. The hydraulic cylinder with a piston rod protection structure according to claim 4, characterized in that: The auxiliary card frame (504) and the auxiliary through slot (42) are arranged at corresponding positions and have the same number of groups, and the auxiliary card frame (504) is adapted to be plugged and arranged in the auxiliary through slot (42).

6. The hydraulic cylinder with a piston rod protection structure according to claim 4, characterized in that: The two fastening clamps (501) are arranged as a group, and the fastening clamps (501) are fixed by means of a provided locking structure.

7. The hydraulic cylinder with a piston rod protection structure according to claim 4, characterized in that: The locking structure comprises a connecting thread column (601), a tension connection nut (602), an auxiliary ring (603), a locking screw (604), and an internal thread fastening cap (605); the connecting thread column (601) passes through the mounting hole (503) on the connecting plate head (502), and the two ends of the connecting thread column (601) are symmetrically threadedly connected and provided with tension connection nuts (602).

8. The hydraulic cylinder with a piston rod protection structure according to claim 7, characterized in that: Auxiliary ring openings (603) are equidistantly fixedly provided on the side of one end of the tension connection nut (602), the locking screw (604) passes through one of the auxiliary ring openings (603), and the locking screw (604) is threadedly connected to the internal thread fastening cap (605).

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