Piston rod with end face positioned

Abstract

The utility model discloses an end face positioning piston rod, and relates to the field of hydraulic cylinder parts, the piston rod comprises a shaft rod body, two opposite ends of the shaft rod body are respectively a first end and a second end, the first end is used for connecting a piston, and the second end is used for connecting a hanging ring; the end face of the second end is coaxially connected with a connecting column, the connecting column extends in the direction away from the shaft rod body, and external threads are arranged on the periphery of the connecting column. A rotation stopping plane is formed on the periphery of the second end in a cutting mode, the rotation stopping plane extends in the direction parallel to the length direction of the shaft rod body, and the rotation stopping plane extends to the connecting position of the second end and the connecting column. The lifting ring has the advantages that the lifting ring is convenient to connect, and the piston rod is not easy to rotate.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic cylinder components, and particularly relates to a piston rod with end face positioning. Background Art

[0002] Hydraulic cylinders are widely used as power components or buffer components in automobiles. The hydraulic cylinders in automobiles usually include a working cylinder barrel and a piston rod. The inner end of the piston rod extends into the working cylinder barrel to connect the piston, the outer end of the piston rod extends out of the working cylinder barrel and is connected with a lifting ring, and the outer end of the piston rod is connected to the automobile through the lifting ring.

[0003] In the existing hydraulic cylinders, the lifting ring on the piston rod is usually fixed to the piston rod by welding. The connection between the piston rod and the lifting ring is inconvenient, and the piston rod is prone to circumferential rotation when sliding in the working cylinder barrel of the hydraulic cylinder, which affects the normal use of the hydraulic cylinder. Summary of the Invention

[0004] In order to solve the defects that the connection of the lifting ring on the piston rod is inconvenient and the piston rod is prone to rotation in the prior art, the utility model provides a piston rod with end face positioning.

[0005] The above technical purpose of the utility model is realized by the following technical solutions:

[0006] The utility model provides a piston rod with end face positioning. The piston rod includes a shaft rod body, the opposite ends of the shaft rod body are respectively a first end and a second end, the first end is used for connecting the piston, and the second end is used for connecting the lifting ring;

[0007] A connecting column is coaxially connected to the end face of the second end. The connecting column extends along the direction away from the shaft rod body, and an external thread is arranged on the outer circumference of the connecting column;

[0008] A rotation stopping plane is formed by cutting on the outer circumference of the second end. The rotation stopping plane extends parallel to the length direction of the shaft rod body, and the rotation stopping plane extends to the connection part of the second end and the connecting column.

[0009] Furthermore, the diameter of the connecting column is smaller than the diameter of the second end.

[0010] Furthermore, a flush plane is formed by cutting on the outer circumference of the external thread, and the flush plane is coplanar with the rotation stopping plane.

[0011] Furthermore, a first flow channel is arranged in the shaft rod body, a second flow channel is arranged in the connecting column, and the first flow channel and the second flow channel are communicated with each other and both extend along the central axis of the shaft rod body.

[0012] Further, a positioning hole is formed at one end of the connecting column away from the shaft rod body, the positioning hole penetrates through the end of the connecting column, and the diameter of the positioning hole is larger than the diameter of the second flow channel.

[0013] Further, a limiting surface is formed on one side edge of the second end away from the connecting column on the anti-rotation plane, and the limiting surface extends perpendicular to the anti-rotation plane.

[0014] Further, a positioning ring groove is formed in the second end along the circumferential direction, and the positioning ring groove penetrates through the end of the second end; a flat bottom groove is milled in the positioning ring groove, the flat bottom groove penetrates through the end face of the second end, the bottom wall of the flat bottom groove is the anti-rotation plane, and the side wall of the flat bottom groove is the limiting surface.

[0015] Further, two limiting ring grooves are formed on the shaft rod body, and the limiting ring grooves extend along the circumferential direction of the shaft rod body in a ring shape.

[0016] Further, a piston limiting ring groove is formed in the first end, and the piston limiting ring groove extends along the circumferential direction of the shaft rod body in a ring shape.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. In the utility model, the first end of the shaft rod body is used to extend into the hydraulic cylinder to connect the piston, and the second end of the shaft rod body is connected with a connecting column. External threads are provided on the outer circumference of the connecting column, so that threaded holes provided on the lifting ring can be matched therewith, and the shaft rod body and the lifting ring are connected by means of threaded connection, thus eliminating the need for welding, reducing the connection difficulty, and facilitating the connection between the shaft rod body and the lifting ring; the anti-rotation plane is cut and formed on the outer circumference of the second end, and the anti-rotation plane extends to the connection between the shaft rod body and the connecting column, so that the vehicle can be provided with structures such as bumps or grooves at the end connected with the lifting ring to fit on the anti-rotation plane, so as to circumferentially limit the piston rod and prevent the piston rod from rotating, ensuring the normal operation of the hydraulic cylinder.

[0019] 2. The diameter of the connecting column is smaller than the diameter of the second end, so that a step is formed at the connection between the connecting column and the second end. When the connecting column is matched with the threaded hole on the lifting ring, the step can limit the lifting ring, enabling the lifting ring to be rotated to tighten the connecting column and the lifting ring.

[0020] 3. The outer circumference of the external thread is cut into a flat plane, and the flat plane is coplanar with the anti-rotation plane, so that the connecting column provided with the external thread is not easily blocked by structures such as bumps and grooves provided at the lifting ring, ensuring that the connecting column can be normally connected with the lifting ring. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of a piston rod according to an embodiment of the utility model.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the second end of the piston rod in an embodiment of the present utility model.

[0023] Figure 3 It is a front-view structural schematic diagram of the piston rod in an embodiment of the present utility model.

[0024] Figure 4 It is a vertical sectional structural schematic diagram of the piston rod in an embodiment of the present utility model.

[0025] In the figure:

[0026] 1000, piston rod; 100, shaft rod body; 110, first end; 111, piston limiting ring groove; 120, second end; 121, anti-rotation plane; 122, limiting surface; 123, positioning ring groove; 130, limiting ring groove; 140, first flow channel; 200, connecting column; 210, external thread; 211, flush surface; 220, second flow channel; 230, positioning hole. Detailed implementation manners

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] This embodiment discloses a piston rod 1000 with end face positioning. Refer to Figures 1 to 4 , a piston rod 1000 with end face positioning, including a shaft rod body 100. Among them, the two opposite ends of the shaft rod body 100 are defined as a first end 110 and a second end 120 respectively. The first end 110 extends into the working cylinder of the hydraulic cylinder for connecting the piston, and the second end 120 is used to extend out of the working cylinder of the hydraulic cylinder to connect the lifting ring.

[0029] Refer to Figure 1 , the shaft rod body 100 is integrally cylindrical. A piston limiting ring groove 111 is formed at the first end 110 of the shaft rod body 100. The piston limiting ring groove 111 is annular and extends along the circumferential direction of the shaft rod body 100, so that the piston limiting ring groove 111 is coaxial with the shaft rod body 100. The piston limiting ring groove 111 has opposite side walls and a bottom wall located between the two side walls, and its bottom wall is parallel to the outer peripheral surface of the shaft rod body 100. When installing the piston, the piston is embedded in the piston limiting ring groove 111 and fits on the bottom wall of the piston limiting ring groove 111. The opposite side walls of the piston limiting ring groove 111 limit and fix the piston axially.

[0030] Refer to Figure 1, two limiting ring grooves 130 are formed on the shaft rod body 100. The limiting ring grooves 130 are both annular and extend along the circumferential direction of the shaft rod body 100, so that the limiting ring grooves 130 are also coaxial with the shaft rod body 100. By providing the limiting ring grooves 130, a force application point is provided on the outer peripheral side of the shaft rod body 100, which facilitates the handling and installation of the shaft rod body 100.

[0031] In this embodiment, the two limiting ring grooves 130 are respectively arranged at the first end 110 and the second end 120 of the shaft rod body 100, so that when the shaft rod body 100 is handled and installed by a tool clamped in the limiting ring groove 130, the shaft rod body 100 is more evenly stressed. In addition, in other embodiments, the two limiting ring grooves 130 can also be arranged at other positions on the shaft rod body 100.

[0032] In this embodiment, the limiting ring groove 130 is specifically formed on the shaft rod body 100 by turning.

[0033] Refer to Figure 1 and Figure 2 , a connecting column 200 is coaxially connected to the end face of the second end 120 of the shaft rod body 100. Specifically, the connecting column 200 and the shaft rod body 100 are integrally cast to improve the overall strength of the piston rod 1000. The connecting column 200 extends in a direction away from the shaft rod body 100 and is used to connect with a lifting ring. Specifically, a hole matching the connecting column 200 can be provided on the lifting ring, and the connecting column 200 is inserted into the hole to connect with the lifting ring.

[0034] Among them, an external thread 210 is provided on the outer periphery of the connecting column 200, so that a threaded hole provided on the lifting ring can be matched with it, and the shaft rod body 100 and the lifting ring are connected by a threaded connection method, thus eliminating the need for welding, reducing the connection difficulty, and facilitating the connection between the shaft rod body 100 and the lifting ring.

[0035] In this embodiment, the diameter of the connecting column 200 is smaller than the diameter of the second end 120, so that a step is formed at the connection between the connecting column 200 and the second end 120. When the connecting column 200 is matched with the threaded hole on the lifting ring, the lifting ring can be limited at this step, so that the lifting ring can be rotated to tighten the connecting column 200 and the lifting ring.

[0036] In this embodiment, a first flow channel 140 is arranged in the shaft rod body 100, a second flow channel 220 is arranged in the connecting column 200, and the first flow channel 140 and the second flow channel 220 are communicated with each other and both extend along the central axis of the shaft rod body 100. Through the communicated first flow channel 140 and second flow channel 220, the inner cavity of the piston rod 1000 can be communicated with the lifting ring and the working cylinder barrel of the hydraulic cylinder, meeting the flow requirement of the hydraulic oil.

[0037] Refer to Figure 2 andFigure 4 One end of the connecting column 200 away from the shaft body 100 is provided with a positioning hole 230, and the positioning hole 230 penetrates through the end of the connecting column 200. One end of the positioning hole 230 communicates with the second flow channel 220, and the diameter of the positioning hole 230 is larger than that of the second flow channel 220. When installing the lifting ring, a shaft matching the positioning hole 230 can be arranged on the lifting ring, so as to initially position the connecting column 200 and the lifting ring.

[0038] Refer to Figure 2 In this embodiment, an anti-rotation plane 121 is formed by cutting on the outer periphery of the second end 120, and the anti-rotation plane 121 extends parallel to the length direction of the shaft body 100, and the anti-rotation plane 121 extends to the connection between the second end 120 and the connecting column 200. The anti-rotation plane 121 extends to the connection between the shaft body 100 and the connecting column 200, so that the vehicle can be provided with structures such as bumps or grooves at the end connected to the lifting ring to fit the anti-rotation plane 121, so as to circumferentially limit the piston rod 1000 and prevent the piston rod 1000 from rotating, ensuring the normal operation of the hydraulic cylinder.

[0039] Preferably, a limiting surface 122 is formed on the edge of the second end 120 on the side of the anti-rotation plane 121 away from the connecting column 200, and the limiting surface 122 extends perpendicular to the anti-rotation plane 121. The block or groove fitting the anti-rotation plane 121 arranged at the lifting ring can block the moving path of the limiting surface 122 while restricting the circumferential rotation of the piston rod 1000, so as to limit the extending distance of the piston rod 1000.

[0040] Specifically, in this embodiment, a positioning ring groove 123 is formed in the second end 120 along the circumferential direction, and the positioning ring groove 123 penetrates through the end of the second end 120, that is, by arranging the positioning ring groove 123, the diameter of the part of the second end 120 close to the connecting column 200 is reduced, so as to form a step on the outer periphery of the second end 120 to facilitate the positioning of the shaft body 100. A flat-bottom groove is milled in the positioning ring groove 123, and the flat-bottom groove penetrates through the end face of the second end 120, so that the flat-bottom groove only has a bottom wall and a side wall, the bottom wall of the flat-bottom groove is the anti-rotation plane 121, and the side wall of the flat-bottom groove is the limiting surface 122.

[0041] Preferably, in this embodiment, a flush surface 211 is milled on the external thread 210 on the connecting section, and the flush surface 211 is coplanar with the anti-rotation plane 121, so that the connecting column 200 provided with the external thread 210 is not easily blocked by structures such as bumps and grooves arranged at the lifting ring, ensuring that the connecting column 200 can be normally connected to the lifting ring.

[0042] The above are only the preferred embodiments of the present invention. Therefore, 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 piston rod with end face positioning, characterized in that, The piston rod (1000) includes a shaft body (100). The opposite ends of the shaft body (100) are a first end (110) and a second end (120) respectively. The first end (110) is used to connect to the piston, and the second end (120) is used to connect to the sling. A connecting column (200) is coaxially connected to the end face of the second end (120). The connecting column (200) extends in a direction away from the shaft body (100), and an external thread (210) is provided on the outer circumference of the connecting column (200). An anti-rotation plane (121) is formed by cutting on the outer circumference of the second end (120). The anti-rotation plane (121) extends parallel to the length direction of the shaft body (100), and the anti-rotation plane (121) extends to the connection part between the second end (120) and the connecting column (200).

2. The piston rod with end face positioning according to claim 1, characterized in that, The diameter of the connecting column (200) is smaller than the diameter of the second end (120).

3. The piston rod with end face positioning according to claim 2, characterized in that, A flush surface (211) is formed by cutting on the outer circumference of the external thread (210). The flush surface (211) is coplanar with the anti-rotation plane (121).

4. The piston rod with end face positioning according to claim 2, wherein, A first flow channel (140) is provided in the shaft body (100), and a second flow channel (220) is provided in the connecting column (200). The first flow channel (140) and the second flow channel (220) communicate with each other and both extend along the central axis of the shaft body (100).

5. The piston rod with end face positioning according to claim 4, characterized in that, A positioning hole (230) is opened at one end of the connecting column (200) away from the shaft body (100). The positioning hole (230) penetrates through the end of the connecting column (200), and the diameter of the positioning hole (230) is larger than the diameter of the second flow channel (220).

6. The piston rod with end face positioning according to claim 1, characterized in that, A limiting surface (122) is formed on the edge of the second end (120) on the side away from the connecting column (200) of the anti-rotation plane (121). The limiting surface (122) extends perpendicular to the anti-rotation plane (121).

7. The piston rod with end face positioning according to claim 6, wherein, A positioning ring groove (123) is provided in the second end (120) along the circumferential direction. The positioning ring groove (123) penetrates through the end of the second end (120); a flat-bottom groove is milled in the positioning ring groove (123). The flat-bottom groove penetrates through the end face of the second end (120). The bottom wall of the flat-bottom groove is the anti-rotation plane (121), and the side wall of the flat-bottom groove is the limiting surface (122).

8. The piston rod with end face positioning according to claim 1, characterized in that, Two limiting ring grooves (130) are provided on the shaft body (100). The limiting ring grooves (130) extend along the circumferential direction of the shaft body (100) in a ring shape.

9. The piston rod with end face positioning according to claim 1, wherein, A piston limiting ring groove (111) is opened at the first end (110). The piston limiting ring groove (111) extends along the circumferential direction of the shaft body (100) in a ring shape.

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