Swing oil cylinder with hydraulic oil way sealing device

Abstract

The utility model provides a swing oil cylinder with a hydraulic oil way sealing device, which is provided with an outer shell and an oil balance valve, the bottom end of the oil balance valve is fixedly connected with a fixed plane at the top end of the outer shell, and a positioning column is arranged at the top end of the outer shell and positioned on the fixed plane. A positioning hole is formed in the position, corresponding to the positioning column, of the bottom end of the oil balance valve, a left oil hole and a right oil hole are formed in the positions, located on the fixed plane, of the top end of the outer shell, grooves are formed in the positions, located on the outer circumferences of the left oil hole and the right oil hole, of the top end of the outer shell, and oil sealing rings are arranged in the grooves. The oil balance valve is provided with a first oil hole and a second oil hole, and the left oil hole and the right oil hole are in sealed connection with the first oil hole and the second oil hole through oil sealing rings respectively. According to the swing oil cylinder, the groove is formed in the outer circumference of the oil hole of the outer shell, the oil liquid sealing ring is placed in the groove, and oil liquid sealing between the oil outlet hole in the oil liquid balance valve and the oil hole in the outer shell is achieved. The swing oil cylinder can be widely applied to swing oil cylinders.

Description

Technical Field

[0001] The utility model relates to a swing oil cylinder, in particular to a swing oil cylinder with a hydraulic oil circuit sealing device. Background Art

[0002] In order to increase the stability of oil transmission in the swing cylinder, an oil balancing valve is usually installed outside the outer shell of the swing cylinder. The two oil inlet holes of the oil balancing valve are respectively connected to the oil outlet holes of the hydraulic station, and the two oil outlet holes at the bottom of the oil balancing valve are respectively connected to the two oil holes on the outer shell to achieve stable transmission of oil.

[0003] Since the oil has a certain pressure during transmission, it is easy for the oil to leak out from the connection between the oil balancing valve and the outer shell. In order to solve this problem, a groove is usually provided on the outer circumference of the two oil outlet holes of the oil balancing valve, and an oil sealing ring is placed in the groove. The oil sealing is achieved between the two oil outlet holes of the oil balancing valve and the two oil holes on the outer shell through the oil sealing ring.

[0004] However, since the oil sealing ring is placed at the bottom of the oil balancing valve, the oil sealing ring is prone to shifting or falling off during the installation of the oil balancing valve to the cylinder outer shell, which reduces installation efficiency and wastes operation time. Utility Model Content

[0005] In response to the above technical problems, the utility model provides a swing oil cylinder with a hydraulic oil circuit sealing device. The swing oil cylinder with the hydraulic oil circuit sealing device is provided with grooves on the outer circumference of the two oil holes on the outer shell of the oil cylinder, and an oil sealing ring is placed in the groove, thereby realizing oil sealing between the two oil outlet holes of the oil balance valve and the two oil holes on the outer shell;

[0006] Placing the oil seal ring on the outer circumference of the oil hole of the cylinder outer body can prevent the oil seal ring from shifting or falling off during the installation of the oil balance valve to the cylinder outer body, thereby improving installation efficiency and saving operation time;

[0007] At the same time, by setting positioning holes and positioning columns at the bottom end of the oil balance valve and the corresponding positions of the cylinder outer shell, pre-positioning is formed during the installation of the oil balance valve to the cylinder outer shell, further improving the installation accuracy and saving operation time.

[0008] To this end, the technical solution of the utility model is a swing oil cylinder with a hydraulic oil circuit sealing device, which is provided with an outer shell and an oil balance valve. The top of the outer shell is provided with a fixed plane, and the bottom end of the oil balance valve is fixedly connected to the fixed plane at the top of the outer shell;

[0009] The top of the outer shell is located at the position of the fixed plane and a positioning column is provided. The positioning column protrudes upward along the fixed plane. The bottom end of the oil balance valve is located at a position corresponding to the positioning column and a positioning hole is provided. The positioning hole and the positioning column can be matched and plugged with each other.

[0010] A left oil hole and a right oil hole are respectively provided at the top end of the outer shell at a position located on the fixed plane. The inner sides of the left oil hole and the right oil hole respectively penetrate into the inner cavity of the outer shell, and the outer sides of the left oil hole and the right oil hole respectively penetrate to the outside of the outer shell;

[0011] The top of the outer shell is provided with grooves on the outer circumference of the left oil hole and the right oil hole, and an oil sealing ring is provided in the groove;

[0012] The oil balancing valve is provided with a first oil hole and a second oil hole, respectively. One end of the first oil hole and the second oil hole is connected to the oil outlet of the hydraulic station respectively, and the other end of the first oil hole and the second oil hole passes through the bottom end of the oil balancing valve and is connected with the left oil hole and the right oil hole respectively. The left oil hole and the right oil hole are sealed with the first oil hole and the second oil hole respectively through oil sealing rings.

[0013] Preferably, there are multiple positioning posts and multiple positioning holes, and the multiple positioning posts are respectively located on the fixed plane near the outer side, and the multiple positioning holes are respectively located at the bottom end of the oil balance valve and at positions corresponding to the positioning posts;

[0014] The top end of the positioning column is in an arc shape.

[0015] Preferably, an exhaust hole is provided on the oil balancing valve at an outer position of the positioning hole, one side of the exhaust hole is connected to the bottom end of the positioning hole, and the other side of the exhaust hole passes through to the outside of the oil balancing valve.

[0016] Preferably, a slot is provided at the top of the outer shell at a position on the fixed plane, and a through hole is provided on the oil balancing valve which is longitudinally symmetrical with the slot. The oil balancing valve is screwed through the through hole on the oil balancing valve and is threadedly locked with the slot to achieve locking between the oil balancing valve and the outer shell.

[0017] Preferably, there are multiple slots, and the multiple slots are respectively located on both sides of the two grooves in the radial direction.

[0018] The beneficial effect of the utility model is that, by symmetrically providing positioning posts and positioning holes on the outer shell and the oil balance valve, and providing grooves on the outer circumference of the left oil hole and the right oil hole at the top end of the outer shell, the oil sealing ring is placed in the groove. When the oil balance valve is assembled on the outer shell, first, the oil sealing ring is placed inside the groove. Then, the positioning holes on the oil balance valve and the positioning posts on the outer shell are plugged into each other for positioning. After plugging and positioning, the oil balance valve is moved downward until the oil balance valve and the top end of the outer shell are completely fitted into the position on the fixed plane, and finally the oil balance valve is fixedly connected to the outer shell.

[0019] Pre-positioning is achieved through the positioning holes on the oil balancing valve and the positioning columns on the outer shell, which ensures that the bottom end of the oil balancing valve is accurately pressed vertically against the oil sealing ring, avoiding the direct contact and fitting of the oil balancing valve and the outer shell by humans, which causes the oil balancing valve to collide with the oil sealing ring from an unacceptable angle, resulting in displacement, damage, and falling off of the oil sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is another three-dimensional diagram of the utility model;

[0022] Figure 3 This is a three-dimensional diagram of the outer shell structure of the utility model;

[0023] Figure 4 This is the main view of the utility model;

[0024] Figure 5 This utility model Figure 4 Middle AA section view;

[0025] Figure 6 This utility model Figure 4 Middle BB cross-section;

[0026] Figure 7 This utility model Figure 5 Enlarged view of point C in the middle;

[0027] Figure 8 This utility model Figure 6 Enlarged view of point D in the middle;

[0028] Figure 9 This utility model Figure 3 Enlarged view of point E in the middle.

[0029] Explanation of symbols in the figure:

[0030] 1. Outer shell; 2. Oil balance valve; 3. Positioning column; 4. Slotted hole; 5. Groove; 6. Exhaust hole; 7. Screw; 8. First oil hole; 9. Second oil hole; 10. Left oil hole; 11. Right oil hole; 12. Positioning hole; 13. Fixing plane; 14. Oil sealing ring. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the embodiments.

[0032] pass Figures 1-9 It can be seen that the swing cylinder with a hydraulic oil circuit sealing device is provided with an outer shell 1 and an oil balancing valve 2. A fixed plane 13 is provided at the top of the outer shell 1. The bottom end of the oil balancing valve 2 is fixedly connected to the fixed plane 13 at the top of the outer shell 1. By setting the fixed plane 13, the contact area between the oil balancing valve 2 and the outer shell 1 can be increased, thereby ensuring the stability of the fixation between the oil balancing valve 2 and the outer shell 1.

[0033] A positioning column 3 is provided at the top of the outer shell 1 at the position of the fixed plane 13. The positioning column 3 protrudes upward along the fixed plane 13. A positioning hole 12 is provided at the bottom end of the oil balance valve 2 at the position corresponding to the positioning column 3. The positioning hole 12 and the positioning column 3 can be matched and plugged into each other.

[0034] The top end of the outer shell 1 is located at the position of the fixed plane 13 and is respectively provided with a left oil hole 10 and a right oil hole 11. The inner sides of the left oil hole 10 and the right oil hole 11 respectively penetrate into the inner cavity of the outer shell 1, and the outer sides of the left oil hole 10 and the right oil hole 11 penetrate to the outside of the outer shell 1.

[0035] A groove 5 is provided at the top end of the outer shell 1 on the outer circumference of the left oil hole 10 and the right oil hole 11 , and an oil sealing ring 14 is provided in the groove 5 .

[0036] The oil balancing valve 2 is respectively provided with a first oil hole 8 and a second oil hole 9. One end of the first oil hole 8 and the second oil hole 9 are respectively connected to the oil outlet of the hydraulic station, and the other end of the first oil hole 8 and the second oil hole 9 passes through the bottom end of the oil balancing valve 2 and is respectively connected with the left oil hole 10 and the right oil hole 11. The left oil hole 10 and the right oil hole 11 are respectively sealed with the first oil hole 8 and the second oil hole 9 through an oil sealing ring 14.

[0037] When the oil balancing valve 2 is assembled on the outer shell 1, first, the oil sealing ring 14 is placed inside the groove 5, and then the positioning hole 12 on the oil balancing valve 2 and the positioning column 3 on the outer shell 1 are plugged into each other for positioning. After plugging and positioning, the oil balancing valve 2 is moved downward until the oil balancing valve 2 and the top of the outer shell 1 are completely fitted with the position of the fixed plane 13, and finally the oil balancing valve 2 is fixedly connected to the outer shell 1. The advantage of the structure targeted by the above installation process is that the positioning holes 12 on the oil balancing valve 2 and the positioning columns 3 on the outer shell 1 are used to achieve early pre-positioning, which can ensure that the bottom end of the oil balancing valve 2 is accurately pressed vertically against the oil sealing ring 14, avoiding manual direct contact and fitting of the oil balancing valve 2 with the outer shell 1, which causes the oil balancing valve 2 to bump against the oil sealing ring 14 from an unacceptable angle, causing the oil sealing ring to shift, be damaged, or fall off.

[0038] There are multiple positioning columns 3 and positioning holes 12. Multiple positioning columns 3 are located on the fixed plane 13 near the outside, and multiple positioning holes 12 are located at the bottom end of the oil balancing valve 2 corresponding to the positioning columns 3. By setting multiple positioning columns 3 and positioning holes 12, the stability of the pre-positioning between the oil balancing valve 2 and the outer shell 1 can be increased, avoiding the shaking of the oil balancing valve 2 during the installation process, and further avoiding the oil balancing valve 2 from causing collision with the oil sealing ring 14.

[0039] The top of the positioning post 3 is in the shape of an arc surface, which plays a certain guiding role, increasing the accuracy of the insertion between the positioning post 3 and the positioning hole 12.

[0040] An exhaust hole 6 is provided on the oil balance valve 2 at the outer side of the positioning hole 12. One side of the exhaust hole 6 is connected to the bottom end of the positioning hole 12, and the other side of the exhaust hole 6 extends to the outside of the oil balance valve 2. In order to increase the accuracy of the oil balance valve 2 and the outer shell 1 after installation, during installation, the outer circumference of the positioning column 3 is almost in contact with the inner circumference of the positioning hole 12. At this time, since the air inside the positioning hole 12 is difficult to be discharged outward, the resistance in the plugging process of the positioning column 3 and the positioning hole 12 is large, and the operation efficiency is slow. Therefore, by providing the exhaust hole 6 at the outer side of the positioning hole 12, during the plugging process of the positioning column 3 and the positioning hole 12, the air inside the positioning hole 12 is discharged outward from the exhaust hole 6, thereby reducing the resistance of the plugging process and saving time and effort.

[0041] A slotted hole 4 is provided at the top of the outer shell 1 at the position of the fixed plane 13, and a through hole is provided on the oil balancing valve 2 which is longitudinally symmetrical with the slotted hole 4. The oil balancing valve 2 is threadedly locked with the slotted hole 4 through a screw 7 passing through the through hole on the oil balancing valve 2, thereby realizing the locking between the oil balancing valve 2 and the outer shell 1. The oil balancing valve 2 and the outer shell 1 are locked and fixed by the screw 7, so that the oil balancing valve 2 and related components can be quickly disassembled and assembled, saving operation time.

[0042] There are multiple slots 4 , and the multiple slots 4 are respectively located on both sides of the two grooves 5 in the radial direction.

[0043] The slots 4 are respectively arranged at the radial sides of the two grooves 5, which can form the same force squeezing on the two oil sealing rings 14, ensure the uniformity of the force on the oil sealing rings 14, and give full play to the sealing effect of the oil sealing rings 14. If the slots 4 are located on the same side of the grooves 5, after the oil balancing valve 2 and the outer shell 1 are locked, the compression of the oil sealing ring 14 on one side of the slot 4 will be significantly greater than the compression on the other side of the oil sealing ring 14, which directly affects the sealing effect of the oil sealing ring 14.

[0044] However, the above description is merely a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A swing cylinder with a hydraulic oil circuit sealing device, characterized by: An outer shell and an oil balance valve are provided, the top of the outer shell is provided with a fixed plane, and the bottom end of the oil balance valve is fixedly connected to the fixed plane on the top of the outer shell; The top end of the outer shell is located at the position of the fixed plane and is provided with a positioning post, the positioning post protrudes upward along the fixed plane, and the bottom end of the oil balance valve is located at a position corresponding to the positioning post and is provided with a positioning hole, the positioning hole and the positioning post can be matched and plugged with each other; The top end of the outer shell is located at a position of the fixed plane and is respectively provided with a left oil hole and a right oil hole. The inner sides of the left oil hole and the right oil hole respectively penetrate into the inner cavity of the outer shell, and the outer sides of the left oil hole and the right oil hole respectively penetrate to the outside of the outer shell; The top end of the outer shell is provided with a groove on the outer circumference of the left oil hole and the right oil hole, and an oil sealing ring is provided in the groove; The oil balancing valve is respectively provided with a first oil hole and a second oil hole, one end of the first oil hole and the second oil hole is respectively connected to the oil outlet of the hydraulic station, and the other end of the first oil hole and the second oil hole passes through the bottom end of the oil balancing valve and is respectively communicated with the left oil hole and the right oil hole, and the left oil hole and the right oil hole are respectively sealed with the first oil hole and the second oil hole through oil sealing rings.

2. The swing cylinder with a hydraulic oil circuit sealing device according to claim 1, characterized in that: There are multiple positioning posts and positioning holes, and the multiple positioning posts are respectively located on the fixed plane near the outer side, and the multiple positioning holes are respectively located at the bottom end of the oil balance valve and at positions corresponding to the positioning posts; The top end of the positioning column is in the shape of an arc surface.

3. The swing cylinder with a hydraulic oil circuit sealing device according to claim 2, characterized in that: An exhaust hole is provided on the oil balance valve at an outer position of the positioning hole. One side of the exhaust hole is connected to the bottom end of the positioning hole, and the other side of the exhaust hole passes through to the outside of the oil balance valve.

4. The swing cylinder with a hydraulic oil circuit sealing device according to claim 3, characterized in that: A slot is provided at the top of the outer shell at a position on the fixed plane, and a through hole is provided on the oil balancing valve that is longitudinally symmetrical with the slot. The oil balancing valve is screwed through the through hole on the oil balancing valve and is threadedly locked with the slot to achieve locking between the oil balancing valve and the outer shell.

5. The swing cylinder with a hydraulic oil circuit sealing device according to claim 4, characterized in that: There are multiple slots, and the multiple slots are respectively located on both sides of the two grooves in the radial direction.

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