Hydraulic cylinder barrel structure and hydraulic cylinder

Abstract

The hydraulic cylinder barrel structure comprises a cylinder barrel, end covers and a sealing cover, the end covers comprise the first end cover and the second end cover, a first rivet hole and a sealing ring groove are formed in the position, used for installing the end covers, of the cylinder barrel, and the sealing ring groove is located on the outer side of the first rivet hole. The end cover is provided with a second rivet hole, an oil outlet hole and an end cover sealing ring used for being matched with the cylinder barrel, the end cover is connected with the cylinder barrel through a rivet, the sealing cover is installed at the two ends of the cylinder barrel, the oil outlet hole is formed in the end cover and used for installing an oil pipe, circulation of hydraulic oil in the hydraulic cylinder is achieved, and the process that a hole is formed in a cylinder barrel of a conventional hydraulic cylinder is replaced. Compared with the prior art, the cylinder has the advantages that the process is simple, the production efficiency is high, the product quality stability is high, the end cover and the cylinder barrel are connected through the rivet, compared with a welding and butt clamping structure, the production efficiency is improved, the cost is reduced, the rivet structure can achieve the dismounting effect, and therefore the end cover can be more conveniently maintained and replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field especially a hydraulic cylinder barrel structure and hydraulic cylinder. BACKGROUND

[0002] The present hydraulic cylinder commonly adopts welding or bolt pair clamping structure, adopts welding between the end cover of the two heads of the hydraulic cylinder and the hydraulic cylinder barrel in the welding structure, then punches a hole on the hydraulic cylinder barrel for oil outlet of the hydraulic cylinder, the bolt is threaded on the end cover of the bolt pair clamping structure, two end covers clamp the middle cylinder through the bolt, then punch a hole on the hydraulic cylinder barrel for oil outlet of the hydraulic cylinder, since the surface of the cylinder is cylindrical, the requirement for welding is very high, and false welding is prone to occur, which leads to complex welding process, low efficiency, increase of the outer shape size and thickness of the end cover of the clamping type, increase of cost, and increase of the cost of the bolt, in addition, pressure fluctuation occurs in the working process of the hydraulic system, which is easy to cause damage to the hydraulic system, and the present application is proposed in view of the above-mentioned defects. SUMMARY

[0003] The utility model discloses a hydraulic cylinder barrel structure and hydraulic cylinder, solve the problem that the present hydraulic cylinder and end cover are connected through welding or pair clamping structure and exist complex process, low efficiency and cost increase.

[0004] To solve the above problems, the utility model provides a kind of hydraulic cylinder barrel structure, including cylinder, end cover and sealing cover, the end cover includes end cover one, end cover two, the position for installing end cover of the cylinder is provided with rivet hole one and sealing ring groove, the sealing ring groove is located the outside of rivet hole one, the end cover is provided with rivet hole two, oil outlet hole and the end cover sealing ring for cooperating with cylinder, the end cover is connected between cylinder by rivet, the sealing cover is installed at both ends of cylinder, the sealing ring groove is provided with the cylinder outer sealing ring between sealing cover and cylinder, since end cover is provided with oil outlet hole, for installing oil pipe, realize the circulation of hydraulic oil in hydraulic cylinder, replace the process that conventional hydraulic cylinder is punched on cylinder, process is simple, production efficiency is high, and product quality stability is high.

[0005] According to an embodiment of the utility model, the rivet hole one and rivet hole two are all provided with several groups, and are evenly distributed on circumference, preferably provided with two to four groups.

[0006] According to an embodiment of the utility model, the end cover is also provided with sealing ring between sealing cover for sealing, to further realize better sealing effect.

[0007] According to an embodiment of the utility model, the end cover sealing ring is located the inside of rivet hole two.

[0008] According to an embodiment of the present invention, a piston rod mounting hole and an oil seal mounting hole are provided on the second end cover.

[0009] According to an embodiment of the present invention, a lifting ear mounting screw hole is provided on the end cover 1 for mounting the lifting ear.

[0010] According to one embodiment of the present invention, an airbag assembly is provided in the cylinder, and the airbag can mitigate hydraulic shock. When the load fluctuates, the pressure of the hydraulic oil acting in the hydraulic cylinder will fluctuate, causing impact damage to the hydraulic system. The impact damage can be reduced through the cushioning effect of the airbag.

[0011] According to an embodiment of the present invention, the airbag assembly is provided in two groups, which are respectively arranged close to the end covers on both sides.

[0012] According to one embodiment of the present invention, the airbag assembly is connected to the inflation port and the pressure sensor, which are respectively used to inflate the airbag and monitor the pressure. The volume of the airbag can be controlled by adjusting the pressure in the airbag to change the effective stroke of the hydraulic cylinder.

[0013] A hydraulic cylinder comprises the above-mentioned hydraulic cylinder barrel structure.

[0014] The beneficial effect of the utility model is that an oil outlet hole is provided on the end cover for installing an oil pipe, thereby realizing the circulation of the hydraulic oil in the hydraulic cylinder, replacing the process of drilling holes on the cylinder barrel of a conventional hydraulic cylinder. The process is simple, the production efficiency is high, and the product quality stability is high. The end cover and the cylinder barrel are connected by rivets, which improves the production efficiency and reduces the cost compared with welding and clamping structures. The rivet structure can achieve a disassembly effect, so that the end cover can be repaired and replaced more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the cylinder barrel and end cover;

[0017] Figure 2 Schematic diagram of the structure of end cover 1;

[0018] Figure 3 is a cross-sectional view of end cap 1;

[0019] Figure 4 2 is a structural diagram of the end cover 2;

[0020] Figure 5 is a cross-sectional view of the second end cover;

[0021] Figure 6 It is a structural diagram of the cylinder;

[0022] Figure 7 Structure diagram of sealing cover;

[0023] Figure 8 Sectional view of hydraulic cylinder barrel structure in Example 3. DETAILED DESCRIPTION

[0024] The following description is merely intended for the purpose of revealing the present application so that those skilled in the art can implement the present application. The examples in the following description are only for example, and those skilled in the art can think of other obvious modifications. The basic principles of the present application defined in the following description can be applied to other embodiments, modification schemes, improvement schemes, equivalent schemes and other schemes without departing from the spirit and scope of the present application.

[0025] Example 1:

[0026] A hydraulic cylinder barrel structure and a hydraulic cylinder, such as Figures 1-7 , comprising a cylinder barrel 1, an end cover and a sealing cover 4, the end cover comprising an end cover one 3 and an end cover two 2, the end cover being provided with a rivet hole two, an oil outlet hole and an end cover sealing ring for cooperation with the cylinder barrel, the end cover one 3 and the end cover two 2 being respectively installed at both ends inside the cylinder barrel 1, and the sealing cover 4 being installed at both ends of the cylinder barrel 1 to further seal the end cover installation position.

[0027] As shown in Figure 5 , the cylinder barrel 1 is provided with a rivet hole one 12 and a sealing ring groove 11 at the position for installing the end cover, the sealing ring groove 11 is located outside the rivet hole one 12 (the side close to the end of the cylinder barrel is the outside), and the sealing ring groove 11 is provided with a barrel outer sealing ring 13 located between the sealing cover 4 and the cylinder barrel 1,

[0028] As shown in Figure 2 , Figure 3 , the end cover one 3 is provided with a lifting lug mounting screw hole 32 for installing a lifting lug, and is also provided with an end cover one rivet hole two 33, an end cover one end cover sealing ring 35 and an end cover one oil outlet hole 31, preferably, the end cover one end cover sealing ring 35 is located inside the end cover one rivet hole two 33, and is also provided with an auxiliary sealing ring one 34 for cooperation with the sealing cover 4, and when installing the oil pipe, the sealing cover 4 can be treated with corresponding hole opening and the like.

[0029] As shown in Figure 4 , Figure 5 , the end cover two 2 is provided with a piston rod mounting hole 23 and an oil seal mounting hole 26, and is also provided with an end cover two rivet hole two 25, an end cover two end cover sealing ring 21 and an end cover two oil outlet hole 24, preferably, the end cover two end cover sealing ring 21 is located inside the end cover two rivet hole two 25, and is also provided with an auxiliary sealing ring two 22 for cooperation with the sealing cover 4.

[0030] The rivet holes are arranged in several groups and are evenly distributed on the circumference of the cylinder barrel and the end cover, preferably two to four groups.

[0031] Due to the oil outlet hole arranged on the end cover for installing the oil pipe to realize the circulation of the hydraulic oil in the hydraulic cylinder, the process is simple, the production efficiency is high, the product quality is stable, the end cover is connected with the cylinder barrel through the rivet, compared with the welding and the clamping structure, the production efficiency is improved, the cost is reduced, the rivet structure can realize the disassembly effect, so that the end cover can be more conveniently repaired and replaced.

[0032] Embodiment 2:

[0033] On the basis of embodiment 1, as Figure 8 , two groups of air bag assemblies are arranged in the cylinder barrel 1, the air bag assemblies are air bag one 51 and air bag two 52, the air bag assemblies are adaptively arranged in shape, avoiding the oil way and the piston rod, for example, the air bag one 51 is arranged in a ring shape, the inner circle is used for installing the piston rod, the two air bag assemblies are arranged close to the two end covers, the air bag can slow down the hydraulic impact, when the load fluctuates, the pressure of the hydraulic oil acting on the hydraulic cylinder will fluctuate, which will form an impact damage to the hydraulic system, through the buffering effect of the air bag, the impact damage can be reduced.

[0034] Embodiment 3:

[0035] On the basis of embodiment 2, the air bag assemblies are connected with the inflation port 53 and the pressure sensor 54, respectively used for inflating the air bag and monitoring the pressure, the inflation port 53 extends to the outside of the cylinder barrel 1, the inflation and exhaust of the air bag can be controlled by controlling the opening and closing of the inflation port 53, a gas pump can be installed on the inflation port to realize the inflation and exhaust, and the pressure sensor is installed outside the cylinder barrel.

[0036] The stroke of the conventional hydraulic cylinder is fixed, which can only adapt to a single working condition, through controlling the volume of the air bag, the effective stroke of the hydraulic cylinder can be changed, specifically, the volume of the air bag can be obtained through the pressure value, the effective volume of the hydraulic oil in the cylinder barrel can be controlled by controlling the volume of the air bag; the volume of the air bag can be controlled by adjusting the pressure in the air bag, the effective stroke of the hydraulic cylinder is changed, and different working conditions can be adapted.

[0037] A hydraulic cylinder, comprising the hydraulic cylinder barrel structure in any of the above embodiments.

[0038] It should be understood by those skilled in the art that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can have any deformation and modification without departing from the principle.

Claims

1. A hydraulic cylinder structure, characterized in that: The invention comprises a cylinder barrel (1), an end cover and a sealing cover (4), wherein the end cover comprises an end cover 1 (3) and an end cover 2 (2), a rivet hole 1 (12) and a sealing ring groove (11) are provided at a position of the cylinder barrel (1) for installing the end cover, the sealing ring groove (11) is located outside the rivet hole 1 (12), the end cover is provided with a rivet hole 2, an oil outlet hole and an end cover sealing ring for matching with the cylinder barrel, the end cover and the cylinder barrel (1) are connected by rivets, the sealing cover (4) is installed at both ends of the cylinder barrel (1), and an outer cylinder sealing ring (13) is provided in the sealing ring groove (11) and is located between the sealing cover (4) and the cylinder barrel (1).

2. The hydraulic cylinder structure according to claim 1, characterized in that: The rivet holes 1 (12) and the rivet holes 2 are both provided in a plurality of groups and are evenly distributed on the circumference.

3. The hydraulic cylinder structure according to claim 1, characterized in that: A sealing ring is also provided between the end cover and the sealing cover (4) for sealing.

4. The hydraulic cylinder structure according to claim 1, characterized in that: The end cover sealing ring is located on the inner side of the second rivet hole.

5. The hydraulic cylinder structure according to any one of claims 1 to 4, characterized in that: The second end cover (2) is provided with a piston rod mounting hole (23) and an oil seal mounting hole (26).

6. The hydraulic cylinder structure according to claim 5, characterized in that: The end cover 1 (3) is provided with a screw hole (32) for mounting an ear.

7. The hydraulic cylinder structure according to any one of claims 1 to 4, characterized in that: An airbag assembly is arranged in the cylinder (1).

8. The hydraulic cylinder structure according to claim 7, characterized in that: The airbag components are arranged in two groups, and are respectively arranged close to the end covers on both sides.

9. The hydraulic cylinder structure according to claim 8, characterized in that: The airbag assembly is connected to the inflation port (53) and the pressure sensor (54).

10. A hydraulic cylinder, characterized in that: The hydraulic cylinder structure comprises the hydraulic cylinder structure described in any one of claims 1 to 9.

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