Piston

Abstract

The utility model discloses a piston, which relates to the technical field of pistons and comprises a piston body, the top of the piston body extends upwards to form a first protrusion and a second protrusion, the first protrusion is arranged on the outer ring of the piston body, and the second protrusion is arranged on the inner ring of the piston body. A first oil guide hole and a second oil guide hole are formed in the piston body, a flow limiting block is fixed to the second oil guide hole, and a first flow limiting hole and a second flow limiting hole are formed in the flow limiting block. Circulating oil liquid can be conveniently controlled according to the size of the installed valve plate, the shock absorber has different damping effects, when the oil liquid in the shock absorber flows to the piston through the oil guide hole, the impact on the oil guide hole is large, the impact on the oil guide hole by the oil liquid can be effectively reduced through the flow limiting block, and the service life of the shock absorber is prolonged. And oil flowing to the first oil guide hole and the second oil guide hole is smoother, protection on the piston is improved, and therefore the service life of the piston is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pistons, in particular to a piston. Background Art

[0002] Shock absorbers are mainly used to suppress the shock caused by the rebound of the spring after absorbing the shock and the impact from the road. The shock absorber includes a cylinder filled with oil, a piston, a piston rod and cavities on both sides of the piston. The oil in the cavities on both sides of the shock absorber separated by the piston can replenish each other. If the oil flows too fast when passing through the piston, it will cause a certain impact on the piston. Long-term use will also cause serious corrosion of the piston, reducing the service life of the piston.

[0003] The existing patent (Announcement No.: CN211449481U) proposes a shock absorber piston, a piston body, and the piston body includes a mounting platform, an oil retaining ring is provided on the mounting platform, a concave cavity is provided on the inner side of the oil retaining ring, and oil guide holes penetrating the piston body are evenly distributed on the bottom of the concave cavity, and an oil guide groove is provided on the oil retaining ring; the bottom height of the oil guide groove is higher than the upper edge height of the hole wall of the oil guide hole. The design of this utility model saves the material of an elastic valve plate, and the structure of installing elastic plates on both sides is changed to a structure with an elastic plate on one side, which is more convenient for disassembly and installation during replacement, and also reduces the probability of damage. By adjusting the size of the piston and the number of oil guide holes and oil guide grooves, it can adapt to shock absorbers of different sizes, and adjust the liquid resistance on both sides of the piston when working.

[0004] The above-mentioned shock absorber piston adopts a technical solution of saving materials, changing the structure with elastic sheets installed on both sides to a structure with elastic sheets on one side. It is more convenient to disassemble and install during replacement. The problem with this solution is that although it saves an elastic valve sheet, at the same time it makes the oil in the shock absorber have a greater impact on the oil guide hole, which can easily cause damage to the piston over time. Therefore, we propose a piston to solve the above problem. Utility Model Content

[0005] The utility model provides a piston, which solves the current technical problem that the piston is easily damaged.

[0006] To solve the above technical problems, the utility model provides a piston, including a piston body, a first protrusion and a second protrusion extending upward from the top of the piston body, the first protrusion is arranged on the outer ring of the piston body, the second protrusion is arranged on the inner ring of the piston body, the area between the first protrusion and the second protrusion is used to set the valve plate, and a first oil guide hole and a second oil guide hole are opened in the piston body, the first oil guide hole is close to the second protrusion and the first oil guide hole is evenly distributed in an annular shape on the piston body, the second oil guide hole is close to the first protrusion and is distributed in an annular shape on the piston body, the center positions of the first oil guide hole and the second oil guide hole are on the same horizontal line, a limiting flow block is fixed on the second oil guide hole, and the limiting flow block is provided with a first limiting flow hole and a second limiting flow hole.

[0007] Preferably, the current limiting block is arched and clamping blocks are fixed on both sides of the current limiting block.

[0008] By adopting the above technical solution, the flow limiting block is arched and clamping blocks are fixed on both sides of the flow limiting block, so that the flow limiting block can be easily installed on the piston.

[0009] Preferably, two first flow limiting holes are provided and are symmetrically distributed on the flow limiting block with the second flow limiting hole as the axis.

[0010] The above technical solution is adopted: two first flow limiting holes are opened and symmetrically distributed on the flow limiting block with the second flow limiting hole as the axis. The multiple flow limiting holes can limit the flow of oil in the shock absorber, increase damping, and improve the shock absorption effect. At the same time, it prevents the oil flow rate from being too high to impact the second oil guide hole and cause damage to the piston.

[0011] Preferably, an oil baffle plate is provided on the piston body, and the oil baffle plate separates two adjacent second oil guide holes. A plurality of the oil baffle plates are provided, and an oil guide groove is provided between two of the oil baffle plates.

[0012] The above technical solution is adopted: an oil baffle plate is arranged on the piston body, the oil baffle plate separates two adjacent second oil guide holes, a plurality of oil baffle plates are arranged, and an oil guide groove is arranged between two oil baffle plates, so that the oil in the shock absorber can flow along the oil guide groove, the oil flow is more uniform, and the impact of the oil on the piston body is further avoided.

[0013] Preferably, the oil guide groove is connected to both the first oil guide hole and the second oil guide hole.

[0014] The above technical solution is adopted: the oil guide groove is connected with the first oil guide hole and the second oil guide hole, so that the oil can flow to the first oil guide hole and the second oil guide hole through the oil guide groove, thereby realizing the circulation of oil up and down the piston. When the oil flows to the bottom of the piston, the bottom valve plate is closed, and the oil lifts the piston. When the oil flows to the top of the piston, the top valve plate is closed, and the oil presses the piston to its original position. The first oil guide hole and the second oil guide hole enhance the fluidity of the oil in the piston.

[0015] Preferably, two sides of the second oil guide hole are provided with card slots, and the size of the card slots matches the size of the card block.

[0016] By adopting the above technical solution, slots are provided on both sides of the second oil guide hole, and the size of the slots matches the size of the block, so as to facilitate the installation of the current limiting block on the second oil guide hole.

[0017] Preferably, a side wall of the piston body is provided with a piston ring groove, and at least one piston ring groove is provided.

[0018] The above technical solution is adopted: a piston ring groove is opened through the side wall of the piston body for installing the piston ring, and at least one piston ring groove is opened. The piston ring mainly ensures that the piston moves smoothly in the working cylinder, that is, at least one piston ring groove is opened for installing the piston ring to ensure the stability of the shock absorber during operation, thereby improving the practicality of the piston.

[0019] Compared with the related art, the utility model has the following beneficial effects:

[0020] 1. Compared with the traditional piston, the utility model provides a limited flow block, and the top of the piston body extends upward with a first protrusion and a second protrusion, the first protrusion is provided on the outer ring of the piston body, the second protrusion is provided on the inner ring of the piston body, the area between the first protrusion and the second protrusion is used to provide a valve plate, and the piston body is provided with a first oil guide hole and a second oil guide hole, the first oil guide hole is close to the second protrusion and the first oil guide hole is evenly distributed in an annular shape on the piston body, the second oil guide hole is close to the first protrusion and is distributed in an annular shape on the piston body, and the first oil guide hole is close to the first protrusion and is distributed in an annular shape on the piston body. The center positions of the hole and the second oil guide hole are on the same horizontal line, a limiting flow block is fixed on the second oil guide hole, and the limiting flow block is provided with a first limiting flow hole and a second limiting flow hole. The new design has the first oil guide hole and the second oil guide hole, which is convenient for controlling the circulating oil according to the size of the control installation valve plate to form shock absorbers with different damping effects. When the oil in the shock absorber flows to the piston through the oil guide hole, the impact on the oil guide hole is relatively large. The limiting flow block can effectively reduce the impact of the oil on the oil guide hole, thereby extending the service life of the piston and improving the protection of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the piston;

[0022] Figure 2 The figure is a disassembled structural diagram of the piston in the piston;

[0023] Figure 3 A cross-sectional view of a piston within a piston.

[0024] Numbers in the figure: 1. Piston body; 2. Piston ring groove; 3. Oil guide groove; 4. First protrusion; 5. Second protrusion; 6. Oil baffle plate; 7. First oil guide hole; 8. Second oil guide hole; 9. Current limiting block; 91. First current limiting hole; 92. Clamp block; 93. Second current limiting hole; 10. Clamp groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] like Figure 1-Figure 3 As shown, the piston comprises a piston body 1, a first protrusion 4 and a second protrusion 5 extending upward from the top of the piston body 1, the first protrusion 4 being arranged on the outer ring of the piston body 1, the second protrusion 5 being arranged on the inner ring of the piston body 1, the area between the first protrusion 4 and the second protrusion 5 being used to arrange a valve sheet, a first oil guide hole 7 and a second oil guide hole 8 being provided in the piston body 1, the first oil guide hole 7 being close to the second protrusion 5 and the first oil guide hole 7 being evenly distributed in an annular shape on the piston body 1, the second oil guide hole 8 being close to the first protrusion 4 and being distributed in an annular shape on the piston body 1, the center positions of the first oil guide hole 7 and the second oil guide hole 8 being on the same horizontal line, a limiting flow block 9 being fixed on the second oil guide hole 8, and a first limiting flow hole 91 and a second limiting flow hole 93 being provided on the limiting flow block 9;

[0028] The top of the piston body 1 extends upward with a first protrusion 4 and a second protrusion 5, the first protrusion 4 is arranged on the outer ring of the piston body 1, the second protrusion 5 is arranged on the inner ring of the piston body 1, the area between the first protrusion 4 and the second protrusion 5 is used to set the valve plate, and the piston body 1 is provided with a first oil guide hole 7 and a second oil guide hole 8, the first oil guide hole 7 is close to the second protrusion 5 and the first oil guide hole 7 is evenly distributed in an annular shape on the piston body 1, the second oil guide hole 8 is close to the first protrusion 4 and is distributed in an annular shape on the piston body 1, and the first oil guide hole 7 and the second oil guide hole 8 are arranged in an annular shape on the piston body 1. The center positions are on the same horizontal line, a limiting block 9 is fixed on the second oil guide hole 8, and a first limiting hole 91 and a second limiting hole 93 are provided on the limiting block 9. The new design has a first oil guide hole 7 and a second oil guide hole 8, which is convenient for controlling the circulating oil according to the size of the control installation valve plate to form shock absorbers with different damping effects. When the oil in the shock absorber flows to the piston through the oil guide hole, the impact on the oil guide hole is relatively large. The limiting block 9 can effectively reduce the impact of the oil on the oil guide hole, thereby extending the service life of the piston and improving the protection of the piston.

[0029] Embodiment 2

[0030] like Figure 1-Figure 3 As shown, the flow limiting block 9 is arched and blocks 92 are fixed on both sides of the flow limiting block 9. Two first flow limiting holes 91 are provided and are symmetrically distributed on the flow limiting block 9 with the second flow limiting hole 93 as the axis. An oil baffle plate 6 is provided on the piston body 1. The oil baffle plate 6 separates two adjacent second oil guide holes 8. Several oil baffle plates 6 are provided. An oil guide groove 3 is provided between the two oil baffle plates 6. The oil guide groove 3 is connected to the first oil guide hole 7 and the second oil guide hole 8. Slots 10 are provided on both sides of the second oil guide hole 8. The size of the slot 10 is adapted to the size of the block 92. A piston ring groove 2 is provided on the side wall of the piston body 1. At least one piston ring groove 2 is provided. The piston ring mainly ensures that the piston moves smoothly in the working cylinder, that is, at least one piston ring groove 2 is provided for installing the piston ring to ensure the stability of the shock absorber during operation, thereby improving the practicality of the piston.

[0031] The flow limiting block 9 is arched and clamping blocks 92 are fixed on both sides of the flow limiting block 9, which facilitates the installation of the flow limiting block 9 on the piston. Two first flow limiting holes 91 are opened and symmetrically distributed on the flow limiting block 9 with the second flow limiting hole 93 as the axis. The multiple flow limiting holes can limit the flow of the oil in the shock absorber, increase the damping, and improve the shock absorption effect. At the same time, it prevents the oil flow rate from being too high to impact the second oil guide hole 8 and cause damage to the piston.

[0032] An oil baffle plate 6 is arranged on the piston body 1, and the oil baffle plate 6 separates two adjacent second oil guide holes 8. A plurality of oil baffle plates 6 are arranged, and an oil guide groove 3 is arranged between two oil baffle plates 6, so that the oil in the shock absorber can flow along the oil guide groove 3, and the oil flow is more uniform, further avoiding the impact of the oil on the piston body 1.

[0033] Working principle: Figure 1-3 As shown, the oil can flow to the first oil guide hole 7 and the second oil guide hole 8 through the oil guide groove 3, so as to realize the circulation of the oil up and down the piston. When the oil flows to the bottom of the piston, the bottom valve plate is closed, and the oil lifts the piston. When the oil flows to the top of the piston, the top valve plate is closed, and the oil presses the piston to its original position. The up and down movement of the piston realizes the damping and shock absorbing effect of the shock absorber. The first oil guide hole 7 and the second oil guide hole 8 are convenient for controlling the circulating oil according to the size of the control installation valve plate to form shock absorbers with different damping effects. When the oil in the shock absorber flows to the piston through the oil guide hole, the impact on the oil guide hole is relatively large. The flow limiting block 9 can effectively reduce the impact force of the oil on the oil guide hole, so that the oil flowing to the first oil guide hole 7 and the second oil guide hole 8 is smoother, thereby improving the protection of the piston and extending the service life of the piston.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston, characterized in that: The invention comprises a piston body (1), wherein a first protrusion (4) and a second protrusion (5) are extended upward from the top of the piston body (1), wherein the first protrusion (4) is arranged on the outer ring of the piston body (1), and the second protrusion (5) is arranged on the inner ring of the piston body (1), and the area between the first protrusion (4) and the second protrusion (5) is used to arrange a valve plate, and a first oil guide hole (7) and a second oil guide hole (8) are provided in the piston body (1), wherein the first oil guide hole (7) is close to the second protrusion (5) and the first oil guide hole (7) is evenly distributed in an annular shape on the piston body (1), and the second oil guide hole (8) is close to the first protrusion (4) and is distributed in an annular shape on the piston body (1), wherein the center positions of the first oil guide hole (7) and the second oil guide hole (8) are on the same horizontal line, and a flow limiting block (9) is fixed on the second oil guide hole (8), and the flow limiting block (9) is provided with a first flow limiting hole (91) and a second flow limiting hole (93).

2. The piston according to claim 1, characterized in that The current limiting block (9) is arched and clamping blocks (92) are fixed on both sides of the current limiting block (9).

3. The piston according to claim 1, characterized in that Two first flow limiting holes (91) are provided and are symmetrically distributed on the flow limiting block (9) with the second flow limiting hole (93) as an axis.

4. The piston according to claim 1, characterized in that The piston body (1) is provided with an oil baffle plate (6), which separates two adjacent second oil guide holes (8). A plurality of the oil baffle plates (6) are provided, and an oil guide groove (3) is provided between two of the oil baffle plates (6).

5. The piston according to claim 4, characterized in that The oil guide groove (3) is in communication with both the first oil guide hole (7) and the second oil guide hole (8).

6. The piston according to claim 1, characterized in that The second oil guide hole (8) is provided with clamping grooves (10) on both sides, and the size of the clamping grooves (10) is adapted to the size of the clamping block (92).

7. The piston according to claim 3, characterized in that The side wall of the piston body (1) is provided with a piston ring groove (2), and at least one piston ring groove (2) is provided.

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