Supporting arm telescopic oil cylinder

Abstract

The utility model discloses an oil cylinder structure, belongs to the technical field of hydraulic oil cylinders, and particularly relates to a corbel telescopic oil cylinder which comprises a cylinder body, a first piston, a second piston, a first piston rod, a second piston rod, a front cover, a rear cover and a partition plate. The partition plate is located in the middle of the cylinder body to divide the cylinder body into a left cavity and a right cavity, the front cover is fixedly connected to the front end of the cylinder body in a sleeving mode, the rear cover is fixedly connected to the rear end of the cylinder body in a sleeving mode, and the first piston and the second piston are installed in the cylinder body in a sliding mode and located in the left cavity and the right cavity respectively; according to the telescopic arm oil cylinder, the cylinder body is divided into the left cavity and the right cavity through the division plate, the flow direction of oil is controlled and the pressure is adjusted through the two sets of pistons and piston rods, the oil cylinder is prevented from generating impact and shaking during oil return, and through cooperation of the components, the telescopic arm oil cylinder can achieve stable and efficient telescopic action.

Description

Technical Field

[0001] The utility model discloses an oil cylinder structure, belongs to the technical field of hydraulic oil cylinders, and particularly relates to a supporting arm telescopic oil cylinder. Background Art

[0002] Telescopic boom cylinders are commonly used in equipment such as aerial work platforms. They operate primarily through a hydraulic system to achieve their telescopic function. When pressurized oil enters the rodless chamber, the cylinder with the largest piston effective area begins to extend. As the stroke progresses, the cylinders with the smaller piston effective areas extend in sequence, achieving a longer working stroke. The smaller the effective area of ​​the extended cylinder, the faster the extension speed.

[0003] The telescopic arm oil cylinder in the prior art generates impact and vibration when returning oil, which causes the telescopic arm oil cylinder to work unstably, thereby causing the working efficiency of the telescopic arm oil cylinder to decrease. Utility Model Content

[0004] The purpose of the utility model is to provide a telescopic oil cylinder for supporting arms to solve the above-mentioned problems.

[0005] Technical solution: A support arm telescopic oil cylinder, comprising: a cylinder body, a first piston, a second piston, a first piston rod, a second piston rod, a front cover, a rear cover and a dividing plate;

[0006] In a further embodiment, the dividing plate is located in the middle of the cylinder body to divide the cylinder body into a left cavity and a right cavity, the front cover is fixedly sleeved on the front end of the cylinder body, and the rear cover is fixedly sleeved on the rear end of the cylinder body. The first piston and the second piston are slidably installed in the cylinder body and are respectively located in the left cavity and the right cavity. The first piston rod is slidably installed in the left cavity and one end is fixedly connected to the first piston and the other end extends to the outside through the rear cover. The second piston rod is slidably installed in the right cavity and one end is fixedly connected to the second piston and the other end extends to the outside through the front cover.

[0007] In a further embodiment, the other ends of the first piston rod and the second piston rod are provided with lifting rings.

[0008] In a further embodiment, the cylinder body is provided with an oil pipe, and the oil pipe connects the left cavity and the right cavity.

[0009] In a further embodiment, a spherical bearing is provided in the lifting ring, and the spherical bearing is fixedly installed in the lifting ring by a bearing retaining ring.

[0010] In a further embodiment, a fixing plate is provided outside the cylinder body.

[0011] In a further embodiment, the interior of the first piston rod is cavity-shaped, and a rod cavity is provided in the first piston rod. A first countersunk hole and a second countersunk hole are provided on the lifting ring of the first piston rod. The first countersunk hole is connected to the rod cavity, and the second countersunk hole is connected to the first piston rod cavity.

[0012] In a further embodiment, the first piston rod is fixedly connected to the first piston via a piston nut.

[0013] In a further embodiment, an O-ring and a dumbbell ring are provided between the first piston and the rear cover and between the second piston and the front cover;

[0014] A dust ring, a sealing ring, a buffer ring and a supporting ring are provided between the rear cover and the first piston rod, and between the front cover and the second piston rod.

[0015] In a further embodiment, the first piston and the first piston rod are fixedly connected by a locking screw and a locking washer, a sealing ring and a support ring are provided between the first piston and the cylinder body, and an O-ring is provided between the first piston and the first piston rod.

[0016] In a further embodiment, the second piston and the second piston rod are fixedly connected by a locking screw, a dirt receiving ring and a support ring are provided between the second piston and the cylinder body, and an O-ring is provided between the second piston and the second piston rod.

[0017] Beneficial effects: The utility model divides the cylinder body into a left cavity and a right cavity through a dividing plate, controls the flow direction of oil and adjusts the pressure through two groups of pistons and piston rods, and prevents the cylinder from generating impact and shaking when returning oil. Through the cooperation of these components, the telescopic arm cylinder can achieve smooth and efficient telescopic action. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the present utility model.

[0019] Figure 2 It is a partial cross-sectional view of the present utility model.

[0020] Figure 3 It is a right view of the present utility model.

[0021] Figure 4 It is a schematic diagram of a fixing plate of the present utility model.

[0022] Figure 5 It is a partial schematic diagram of I of the present utility model.

[0023] Figure 6 It is a partial schematic diagram of II of the utility model.

[0024] Figure numerals: cylinder body 1, first piston 2, second piston 3, first piston rod 4, second piston rod 5, front cover 6, rear cover 7, partition plate 8, left cavity 9, right cavity 10, lifting ring 11, oil pipe 12, spherical bearing 13, bearing retaining ring 14, fixing plate 15, rod cavity 16, first counterbore 17, second counterbore 18, piston nut 19, O-ring 20, dumbbell ring 21, dust ring 22, sealing ring 23, buffer ring 24, support ring 25, locking screw 26, locking washer 27, O-ring 28, dirt retaining ring 30. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] A supporting arm telescopic oil cylinder comprises: a cylinder body 1, a first piston 2, a second piston 3, a first piston rod 4, a second piston rod 5, a front cover 6, a rear cover 7, and a dividing plate 8.

[0029] In one embodiment, Figures 1 to 6As shown, the dividing plate 8 is located in the middle of the cylinder body 1 to divide the cylinder body 1 into a left cavity 9 and a right cavity 10, the front cover 6 is fixedly sleeved on the front end of the cylinder body 1, and the rear cover 7 is fixedly sleeved on the rear end of the cylinder body 1, the first piston 2 and the second piston 3 are slidably installed in the cylinder body 1 and are respectively located in the left cavity 9 and the right cavity 10, the first piston rod 4 is slidably installed in the left cavity 9 and one end is fixedly connected to the first piston 2, and the other end extends to the outside through the rear cover 7, and the second piston rod 5 is slidably installed in the right cavity 10 and one end is fixedly connected to the second piston 3, and the other end extends to the outside through the front cover 6.

[0030] In one embodiment, Figures 1 to 6 As shown, the other ends of the first piston rod 4 and the second piston rod 5 are provided with lifting rings 11.

[0031] In one embodiment, Figures 1 to 6 As shown, the cylinder body 1 is provided with an oil pipe 12 , and the oil pipe 12 connects the left cavity 9 and the right cavity 10 .

[0032] In one embodiment, Figures 1 to 6 As shown, a spherical bearing 13 is provided in the lifting ring 11 , and the spherical bearing 13 is fixedly installed in the lifting ring 11 by a bearing retaining ring 14 .

[0033] In one embodiment, Figures 1 to 6 As shown, a fixing plate 15 is provided outside the cylinder body 1 .

[0034] In one embodiment, Figures 1 to 6 As shown, the interior of the first piston rod 4 is in the form of a cavity, and a rod cavity 16 is provided in the first piston rod 4. A first countersunk hole 17 and a second countersunk hole 18 are provided on the lifting ring 11 of the first piston rod 4. The first countersunk hole 17 is connected to the rod cavity 16, and the second countersunk hole 18 is connected to the cavity 16 of the first piston rod 4.

[0035] In one embodiment, Figures 1 to 6 As shown, the first piston rod 4 is fixedly connected to the first piston 2 via a piston nut 19 .

[0036] In one embodiment, Figures 1 to 6 As shown, an OO ring 20 and a dumbbell ring 21 are provided between the first piston 2 and the rear cover 7 and between the second piston 3 and the front cover 6;

[0037] A dust ring 22 , a sealing ring 23 , a buffer ring 24 and a support ring 25 are provided between the rear cover 7 and the first piston rod 4 and between the front cover 6 and the second piston rod 5 .

[0038] In one embodiment, Figures 1 to 6As shown, the first piston 2 and the first piston rod 4 are fixedly connected by a locking screw 26 and a locking washer 27, a sealing ring 23 and a support ring are provided between the first piston 2 and the cylinder body 1, and an OO-type retaining ring 28 is provided between the first piston 2 and the first piston rod 4.

[0039] In one embodiment, Figures 1 to 6 As shown, the second piston 3 and the second piston rod 5 are fixedly connected by a locking screw 26, a dirt receiving ring 30 and a support ring are provided between the second piston 3 and the cylinder body 1, and an OO-type retaining ring 28 is provided between the second piston 3 and the second piston rod 5.

[0040] Working principle: When the utility model is working, first, the first piston rod 4 and the second piston rod 5 are connected to the external equipment through the lifting ring 11. Secondly, during operation, the hydraulic oil is input through the first countersunk hole 17 and flows out into the cylinder body 1 through the rod cavity 16, so that the first piston 2 and the second piston 3 move outward. As the hydraulic oil increases, the first piston rod 4 and the second piston rod 5 are driven to move outward. When the first piston rod 4 and the second piston rod 5 retract, the hydraulic oil is released through the second countersunk hole 18, thereby completing the retraction work.

[0041] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A telescopic oil cylinder for supporting arm, characterized in that: The telescopic oil cylinder comprises: a cylinder body, a first piston, a second piston, a first piston rod, a second piston rod, a front cover, a rear cover and a dividing plate; The dividing plate is located in the middle of the cylinder body to divide the cylinder body into a left cavity and a right cavity, the front cover is fixedly sleeved on the front end of the cylinder body, and the rear cover is fixedly sleeved on the rear end of the cylinder body. The first piston and the second piston are slidably installed in the cylinder body and are respectively located in the left cavity and the right cavity. The first piston rod is slidably installed in the left cavity and one end is fixedly connected to the first piston, and the other end extends to the outside through the rear cover. The second piston rod is slidably installed in the right cavity and one end is fixedly connected to the second piston, and the other end extends to the outside through the front cover.

2. The telescopic oil cylinder for supporting arm according to claim 1, characterized in that: The other ends of the first piston rod and the second piston rod are provided with lifting rings.

3. The support arm telescopic oil cylinder according to claim 1, characterized in that: The cylinder body is provided with an oil pipe, and the oil pipe is connected with the left cavity and the right cavity.

4. The telescopic oil cylinder for supporting arms according to claim 2, characterized in that: A spherical bearing is provided in the lifting ring, and the spherical bearing is fixedly installed in the lifting ring by a bearing retaining ring.

5. The support arm telescopic oil cylinder according to claim 1, characterized in that: A fixing plate is provided outside the cylinder body.

6. The support arm telescopic cylinder according to claim 1, characterized in that: The interior of the first piston rod is a cavity, and a rod cavity is provided in the first piston rod. A first countersunk hole and a second countersunk hole are provided on the lifting ring of the first piston rod. The first countersunk hole is connected to the rod cavity, and the second countersunk hole is connected to the first piston rod cavity.

7. The support arm telescopic oil cylinder according to claim 6, characterized in that: The first piston rod is fixedly connected to the first piston via a piston nut.

8. The support arm telescopic oil cylinder according to claim 1, characterized in that: An O-ring and a dumbbell ring are provided between the first piston and the rear cover, and between the second piston and the front cover; A dust ring, a sealing ring, a buffer ring and a supporting ring are provided between the rear cover and the first piston rod, and between the front cover and the second piston rod.

9. The support arm telescopic oil cylinder according to claim 1, characterized in that: The first piston and the first piston rod are fixedly connected by a locking screw and a locking washer. A sealing ring and a support ring are provided between the first piston and the cylinder body. An O-ring is provided between the first piston and the first piston rod.

10. The support arm telescopic oil cylinder according to claim 1, characterized in that: The second piston is fixedly connected to the second piston rod by a locking screw. A dirt receiving ring and a support ring are provided between the second piston and the cylinder body. An O-ring is provided between the second piston and the second piston rod.

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