Hydraulic shaft of automobile oil cylinder

Abstract

The utility model discloses a hydraulic shaft of an automobile oil cylinder, and relates to the field of hydraulic cylinder parts, the hydraulic shaft of the automobile oil cylinder comprises a shaft rod, the shaft rod is provided with a first end and a second end which are arranged back to back, the first end of the shaft rod is used for connecting a piston, and the second end of the shaft rod is used for extending out of the automobile oil cylinder to be connected with a hanging ring; a circle of supporting ring is arranged at the second end of the shaft rod, the supporting ring and the shaft rod are coaxially arranged, and the supporting ring is arranged in a protruding mode towards the outer side in the radial direction of the shaft rod. A positioning column is arranged on the end face of the second end of the shaft rod, the positioning column is arranged in a protruding mode in the direction away from the first end in the axial direction of the shaft rod, the diameter of the positioning column is smaller than that of the second end of the shaft rod, and the positioning column is arranged at the dead center of the end face of the second end. The utility model has the advantages that the hydraulic shaft and the lifting ring can be conveniently positioned, and the connection strength of the hydraulic shaft and the lifting ring is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic cylinder components, in particular to a hydraulic shaft of an automotive oil cylinder. Background Art

[0002] An automotive oil cylinder is a power component on an automobile. It acts on a piston in a cylinder body through hydraulic oil to push a hydraulic shaft out of the cylinder body and act on a stressed component, so as to push the automobile for jacking and flipping, buffering or providing steering assistance for the automobile.

[0003] The invention patent with the publication number of CN108825706B discloses an intelligent variable damping shock absorber for an electric vehicle, which includes a working cylinder barrel and a piston shaft. The outer end of the piston shaft extends out of the working cylinder barrel and is connected with an upper hanging ear, and the piston shaft is connected to the automobile through the hanging ear. When the automobile vibrates during operation, the vibration of the automobile pushes the piston shaft to expand and contract through the upper hanging ear, so as to change the inner cavity of the working cylinder and achieve shock absorption.

[0004] The hanging ear on the piston shaft of the above shock absorber is usually welded and fixed to the piston shaft. The outer end of the piston shaft is cylindrical. When welding the hanging ear, it is inconvenient to position the hanging ear and the end of the piston shaft, resulting in inconvenient processing of the piston shaft. Moreover, the area of the end of the traditional piston shaft is small, and the connection strength with the hanging ear is weak. Summary of the Invention

[0005] To solve the defects existing in the piston shaft in the prior art, the utility model provides a hydraulic shaft of an automotive oil cylinder, which has the advantages of convenient positioning of the hydraulic shaft and the hanging ring and improved connection strength between the hydraulic shaft and the hanging ring.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] The utility model provides a hydraulic shaft of an automotive oil cylinder. The hydraulic shaft includes a shaft rod, and the shaft rod has a first end and a second end arranged opposite to each other. The first end of the shaft rod is used to connect a piston, and the second end of the shaft rod is used to extend out of the automotive oil cylinder to connect a hanging ring;

[0008] A support ring is arranged at the second end of the shaft rod. The support ring is coaxially arranged with the shaft rod, and the support ring protrudes outward along the radial direction of the shaft rod; a positioning column is arranged on the end face of the second end of the shaft rod. The positioning column protrudes along the axial direction of the shaft rod away from the first end. The diameter of the positioning column is smaller than the diameter of the second end of the shaft rod, and the positioning column is arranged at the center of the end face of the second end.

[0009] Further, a chamfer is arranged on the side of the support ring facing away from the first end.

[0010] Further, the angle of the chamfer is 30° - 45°.

[0011] Furthermore, a ring-shaped positioning groove is provided on the circumferential side of the second end of the shaft rod, the positioning groove extends along the circumference of the shaft rod, and the positioning groove is located on the side of the support ring facing the first end of the shaft rod.

[0012] Furthermore, a piston connecting column is protruding from the end surface of the first end of the shaft rod in a direction away from the second end of the shaft rod, the diameter of the piston connecting column is smaller than the diameter of the second end of the shaft rod, and the piston connecting column is coaxially connected to the second end of the shaft rod and is used to connect the piston.

[0013] Furthermore, a piston limiting groove is provided on the piston connecting column, and the piston limiting groove extends along the circumference of the piston connecting column.

[0014] Furthermore, two piston limiting grooves are provided, and the two piston limiting grooves are arranged in parallel and at intervals on the piston connecting column.

[0015] Furthermore, on a section passing through the axis of the shaft rod, the cross section of the piston limiting groove is rectangular.

[0016] Furthermore, a sealing ring installation groove is provided on the circumferential side of the second end of the shaft rod along the circumferential direction.

[0017] Furthermore, the bottom wall of the positioning groove is parallel to the circumferential side of the shaft rod.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. In the hydraulic shaft of the utility model, the first end of the shaft is connected to the piston to seal and slide in the cylinder body of the oil cylinder; the second end of the shaft is provided with a support ring protruding radially outward, and the lifting ring is connected to the support ring. The provision of the support ring increases the contact area between the lifting ring and the second end of the shaft, thereby facilitating the connection between the lifting ring and the shaft, and after the lifting ring and the shaft are connected, the supporting effect of the shaft through the lifting ring is better. At the same time, a positioning hole can be provided on the lifting ring, and the positioning column protruding at the end of the second end of the shaft can cooperate with the positioning hole on the lifting ring to achieve the preliminary positioning of the lifting ring and the shaft, and facilitate the welding of the lifting ring and the shaft.

[0020] 2. A chamfer is provided on the side of the support ring away from the first end, so that the support ring is not easily damaged due to stress concentration when in contact with the lifting ring.

[0021] 3. A positioning groove is arranged on the circumferential side of the second end of the shaft rod, and a structure matching with the positioning groove can be arranged on the lifting ring, so as to position the lifting ring along the circumference of the shaft rod through the positioning groove, further facilitating the welding of the lifting ring.

[0022] 4. A piston connecting column is provided at the first end of the shaft rod, and the piston is connected through the piston connecting column; the diameter of the piston connecting column is smaller than the diameter of the second end of the shaft rod, so that a step portion is formed between the piston connecting column and the second end of the shaft rod to limit the piston and prevent the piston from moving relative to the shaft rod.

[0023] 5. A limiting groove is provided on the piston connecting column, so that the piston can be embedded in the limiting groove to enhance the connection strength between the piston and the hydraulic shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a hydraulic shaft according to an embodiment of the present invention.

[0025] Figure 2 It is a schematic axial sectional structure diagram of a hydraulic shaft according to an embodiment of the present invention.

[0026] Figure 3 It is Figure 2 The enlarged schematic diagram at position A in

[0027] Figure 4 It is Figure 2 The enlarged schematic diagram at position B in

[0028] In the figure:

[0029] 1000, hydraulic shaft; 100, shaft rod; 110, first end; 120, second end; 130, piston connecting column; 131, piston limiting groove; 140, seal ring installation groove; 150, support ring; 160, chamfer; 170, positioning column; 180, positioning groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] This embodiment discloses a hydraulic shaft 1000 of an automobile oil cylinder. Referring to Figures 1 to 4 , the hydraulic shaft 1000 is used for an automobile oil cylinder. A piston is arranged in the cylinder body of the automobile oil cylinder, the hydraulic shaft 1000 is connected to the piston, and hydraulic oil is introduced into the rodless cavity of the oil cylinder to drive the hydraulic shaft 1000 to move along the cylinder body.

[0032] The hydraulic shaft 1000 is a cylindrical member, which includes a shaft rod 100. The two opposite ends of the shaft rod 100 are defined as a first end 110 and a second end 120 respectively. The first end 110 of the shaft rod 100 is used to insert into the cylinder body and connect to the piston to seal and slide in the cylinder body of the oil cylinder. The second end 120 of the shaft rod 100 is used to extend out of the automobile oil cylinder to connect to a sling. The shaft rod 100 is fixedly connected to the sling, and the sling supports the shaft rod 100 and connects the shaft rod 100 to the automobile.

[0033] A piston connecting column 130 protrudes from the end surface of the first end 110 of the shaft rod 100 in a direction away from the second end 120 of the shaft rod 100. The piston connecting column 130 is used to connect a piston. Specifically, when the piston connecting column 130 is connected to the piston, the piston is sleeved outside the piston connecting column 130 and fixed. The pressure of the hydraulic oil in the cylinder body acts on the piston to push the hydraulic shaft 1000 to reciprocate and slide.

[0034] In this embodiment, the piston connecting column 130 is coaxially connected to the end surface of the first end 110 of the shaft rod 100. The piston connecting column 130 is disposed at the center of the end surface of the first end 110 of the shaft rod 100 and extends in a direction away from the second end 120 of the shaft rod 100. The diameter of the piston connecting column 130 is smaller than the diameter of the first end 110 of the shaft rod 100, so that a stepped portion is formed between the piston connecting column 130 and the first end 110 of the shaft rod 100 to limit the piston, avoiding the piston from moving relative to the shaft rod 100 and making the connection between the piston and the shaft rod 100 more reliable.

[0035] A piston limiting groove 131 is formed on the piston connecting column 130. The piston limiting groove 131 extends along the circumferential direction of the piston connecting column 130, so that the piston limiting groove 131 is coaxially arranged in a ring shape on the piston connecting column 130. When installing the piston, the piston can be embedded in the limiting groove to limit the piston through the limiting groove, enhancing the connection strength between the piston and the hydraulic shaft 1000.

[0036] Refer to Figure 1 and Figure 3 In this embodiment, two piston limiting grooves 131 are provided. The two piston limiting grooves 131 are arranged in parallel at intervals on the piston connecting column 130. By providing two piston limiting grooves 131, the connection strength between the piston and the piston connecting column 130 is further increased. In addition, in other embodiments, the piston limiting groove 131 can also be set to other appropriate numbers.

[0037] In this embodiment, the piston limiting groove 131 is a groove with a rectangular cross-section. Specifically, in the section passing through the axis of the shaft rod 100, the cross-section of the piston limiting groove 131 is rectangular, thereby enhancing the fit between the piston and the piston limiting groove 131 and increasing the connection strength between the piston and the piston connecting column 130.

[0038] Refer to Figure 1 As shown in [reference figure], a sealing ring installation groove 140 is formed in the circumferential direction on the circumferential side of the first end 110 of the shaft rod 100. The sealing ring installation groove 140 is used for installing a sealing ring to be sleeved on the circumferential side of the first end 110 of the shaft rod 100.

[0039] Refer to Figure 1 and Figure 4, in this embodiment, a support ring 150 is provided at the second end 120 of the shaft rod 100, and the support ring 150 is coaxially arranged with the shaft rod 100. The support ring 150 protrudes outward along the radial direction of the shaft rod 100, so that the radial cross-section of the second end 120 of the shaft rod 100 increases at the support ring 150. The support ring 150 protrudes radially outward at the second end 120 of the shaft rod 100, and the sling is connected to the support ring 150. The arrangement of the support ring 150 increases the contact area between the sling and the second end 120 of the shaft rod 100, thus facilitating the connection between the sling and the shaft rod 100, and the supporting effect of the sling on the shaft rod 100 is better after the sling is connected to the shaft rod 100.

[0040] Referring to Figure 4 , a positioning post 170 is provided on the end face of the second end 120 of the shaft rod 100. The positioning post 170 protrudes along the axial direction of the shaft rod 100 away from the first end 110. Thus, positioning structures such as positioning holes can be provided on the sling, and the positioning post 170 protruding from the end of the second end 120 of the shaft rod 100 can cooperate with the positioning holes on the sling to realize the preliminary positioning of the sling and the shaft rod 100, facilitating the welding of the sling and the shaft rod 100.

[0041] In this embodiment, the diameter of the positioning post 170 is smaller than the diameter of the second end 120 of the shaft rod 100, and the positioning post 170 is arranged at the center of the end face of the second end 120 to ensure coaxial positioning of the positioning post 170 and the sling and ensure the connection effect between the shaft rod 100 and the sling.

[0042] Referring to Figure 4 , a chamfer 160 is provided on the side of the support ring 150 facing away from the first end 110. The side of the support ring 150 facing away from the first end 110 contacts the sling. The arrangement of the chamfer 160 makes it not easy to be damaged due to stress concentration when the support ring 150 contacts the sling. Specifically, in this embodiment, the angle of the chamfer 160 is 30° - 45°, preferably 35°.

[0043] A ring-shaped positioning groove 180 is formed on the circumferential side of the second end 120 of the shaft rod 100. The positioning groove 180 extends along the circumferential direction of the shaft rod 100, and the positioning groove 180 is located on the side of the support ring 150 facing the first end 110 of the shaft rod 100. Structures cooperating with the positioning groove 180 can be provided on the sling to position the sling along the circumferential direction of the shaft rod 100 through the positioning groove 180, further facilitating the welding of the sling.

[0044] In this embodiment, the bottom wall of the positioning groove 180 is parallel to the circumferential side of the shaft rod 100, that is, the bottom wall of the positioning groove 180 is a cylindrical circumferential surface, which facilitates the structure on the sling cooperating with the positioning groove 180 to fit on the bottom wall of the positioning groove 180, and further facilitates the positioning of the sling.

[0045] The above are only the preferred embodiments of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A hydraulic shaft of an automotive oil cylinder, characterized in that, The hydraulic shaft (1000) includes a shaft rod (100), the shaft rod (100) has a first end (110) and a second end (120) arranged opposite to each other, the first end (110) of the shaft rod (100) is used to connect a piston, and the second end (120) of the shaft rod (100) is used to extend out of the vehicle oil cylinder to connect a lifting ring; A support ring (150) is arranged at the second end (120) of the shaft rod (100), the support ring (150) is coaxially arranged with the shaft rod (100), and the support ring (150) protrudes outward along the radial direction of the shaft rod (100); a positioning post (170) is arranged on the end face of the second end (120) of the shaft rod (100), the positioning post (170) protrudes along the axial direction of the shaft rod (100) in a direction away from the first end (110), the diameter of the positioning post (170) is smaller than the diameter of the second end (120) of the shaft rod (100), and the positioning post (170) is arranged at the exact center of the end face of the second end (120).

2. The hydraulic shaft of an automotive oil cylinder according to claim 1, characterized in that, A chamfer (160) is arranged on the side of the support ring (150) facing away from the first end (110).

3. The hydraulic shaft of an automotive oil cylinder according to claim 2, characterized in that, The angle of the chamfer (160) is 30° - 45°.

4. The hydraulic shaft of an automotive oil cylinder according to claim 1, characterized in that, A ring-shaped positioning groove (180) is formed on the circumferential side of the second end (120) of the shaft rod (100), the positioning groove (180) extends along the circumferential direction of the shaft rod (100), and the positioning groove (180) is located on the side of the support ring (150) facing the first end (110) of the shaft rod (100).

5. The hydraulic shaft of an automotive oil cylinder according to claim 1, characterized in that, A piston connection post (130) protrudes from the end face of the first end (110) of the shaft rod (100) in a direction away from the second end (120) of the shaft rod (100), the diameter of the piston connection post (130) is smaller than the diameter of the second end (120) of the shaft rod (100), and the piston connection post (130) is coaxially connected to the second end (120) of the shaft rod (100) and is used to connect a piston.

6. The hydraulic shaft of an automotive oil cylinder according to claim 5, characterized in that, A piston limiting groove (131) is formed on the piston connection post (130), and the piston limiting groove (131) extends along the circumferential direction of the piston connection post (130).

7. The hydraulic shaft of an automotive oil cylinder according to claim 6, characterized in that, There are two piston limiting grooves (131), and the two piston limiting grooves (131) are arranged in parallel at intervals on the piston connection post (130).

8. The hydraulic shaft of an automotive oil cylinder according to claim 6, characterized in that, In the section passing through the axis of the shaft rod (100), the cross-section of the piston limiting groove (131) is rectangular in shape.

9. The hydraulic shaft of an automotive oil cylinder according to claim 6, characterized in that, A sealing ring installation groove (140) is formed on the circumferential side of the second end (120) of the shaft rod (100) along the circumferential direction.

10. The hydraulic shaft of an automotive oil cylinder according to claim 4, characterized in that, The bottom wall of the positioning groove (180) is parallel to the circumferential side of the shaft rod (100).

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