Single-cylinder adjustable shock absorber

Abstract

The single-cylinder adjustable shock absorber comprises an oil storage cylinder and a working cylinder, a piston rod penetrates through one side of the oil storage cylinder, one end of the piston rod penetrates into an inner cavity of the working cylinder and is provided with a piston, an oil hole is formed in the piston, a movable cavity is formed in the piston rod, a driving rod is arranged in the movable cavity in a sliding mode, and a supporting ring is arranged at one end of the driving rod. A conical block opposite to the oil hole is arranged on the supporting ring, a containing groove is formed in the piston rod, a driving ring is arranged in the containing groove, a connecting rod with external threads is arranged at one end of a driving rod, a positioning block with internal threads is arranged in the movable cavity, the outer wall of the connecting rod is sleeved with a gear, the gear is in meshing transmission with a rack, and an extension rod is arranged at one end of the rack. A movable groove is formed in the inner wall of the driving ring, the driving ring rotates to indirectly drive the rack and the gear to be in meshing transmission through the extension rod, traditional bolts are prone to seizure with a rotary table after being damaged, the damping force adjusting device can prevent oil from flowing into a gap to affect damping force adjustment, and meanwhile seizure caused by collision is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, and particularly relates to a single-tube adjustable shock absorber. Background Art

[0002] A shock absorber is an essential component of a motor vehicle. Its structure affects the handling and comfort of the whole vehicle, and the stability and reliability of its performance are directly related to the safety, reliability, comfort and handling of the whole vehicle.

[0003] The Chinese utility model patent with the application number CN22120233801.8 discloses a single-tube adjustable shock absorber, which includes an oil storage cylinder. A working cylinder is installed on the inner wall of the oil storage cylinder. A piston rod penetrates through the right side of the oil storage cylinder. The left end of the piston rod penetrates into the inner cavity of the working cylinder and is fixedly connected with a piston. A long groove is formed on the left side of the piston rod. A groove is formed on the right side of the piston. The right side of the inner cavity of the long groove is movably connected with a threaded rod through a bearing. The left end of the threaded rod penetrates through the long groove and extends into the inner cavity of the groove and is movably connected with the left side of the inner cavity of the groove through a bearing. An oil hole is formed on the left side of the piston, which solves the problem that in the existing automobile shock absorber, when working normally, the piston rod drives the piston valve to move up and down in the internal oil pipe. Because the piston rod of a general hydraulic shock absorber does not have an adjustment function, when it cooperates with other components of the shock absorber, it cannot be adjusted, resulting in poor use effect.

[0004] However, the adjusting plate needs to slide at the oil hole, and there will be a certain gap between the two. Part of the oil will enter the gap between the oil hole and the adjusting plate, affecting the adjustment of the oil flow in the oil hole and reducing the effect of adjusting the damping force. At the same time, the bolt and the turntable are connected by screwing. The bolt and the turntable are exposed outside the piston rod. The bolt is very easy to be damaged by external bumps. After being damaged, it is easy to cause jamming with the turntable, affecting the use by personnel. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a single-tube adjustable shock absorber.

[0006] The above technical object of the present utility model is achieved by the following technical solutions: A single-cylinder adjustable shock absorber includes a storage oil cylinder and a working cylinder disposed therein. One side of the storage oil cylinder is provided with a piston rod penetrating through it. One end of the piston rod penetrates into the inner cavity of the working cylinder and is provided with a piston. An oil hole is opened on the piston. An activity cavity is opened inside the piston rod. A driving rod is slidably disposed in the activity cavity. One end of the driving rod penetrates through the piston and is located in the inner cavity of the working cylinder. A support ring is disposed at the position where it is located in the inner cavity of the working cylinder. A conical block opposite to the oil hole is disposed on the support ring. An accommodation groove is opened at one end of the piston rod located outside the storage oil cylinder. A driving ring is rotatably disposed in the accommodation groove. A connecting rod is disposed at one end of the driving rod away from the piston. A positioning block is disposed in the activity cavity. An internal thread is opened in the middle of the positioning block. An external thread screwed with the internal thread is disposed on the connecting rod. A gear is sleeved on the outer wall of the connecting rod. The gear is meshed and driven with a rack. One end of the rack is provided with an extension rod. One end of the extension rod penetrates out of the inside of the activity cavity. An arc-shaped activity groove is opened along the circumference of the inner wall of the driving ring. One end of the extension rod is slidably connected with the activity groove. The rotation of the driving ring can indirectly drive the rack to be meshed and driven with the gear through the extension rod.

[0007] Preferably, a placement groove is opened on the inner wall of the accommodation groove. A driving block is slidably disposed at the placement groove. A plurality of groups of slots are opened along the circumferential direction of the outer wall of the driving ring. A plug rod inserted and matched with the slots is disposed on the driving block.

[0008] Preferably, an arc-shaped sliding groove is opened along the length direction of the inner wall of the activity groove. The extension rod is slidably connected with the sliding groove through a sliding rod.

[0009] Preferably, the gear is connected to the inner wall of the activity cavity through a connecting plate. A guiding groove is opened along the length of the connecting rod. A convex block is disposed on the inner wall of the gear and slidably connected with the guiding groove.

[0010] Preferably, a knob is sleeved on the outer wall of the driving ring.

[0011] Preferably, a friction pad is disposed on the outer wall of the driving block. A telescopic spring is disposed in the placement groove and connected to the bottom side of the driving block.

[0012] Preferably, a telescopic cover is sleeved on one end of the driving rod located in the inner cavity of the working cylinder. One end of the telescopic cover is connected to the outer wall of the piston, and the other end is connected to the support ring. A sealing ring is sleeved on the bottom outer wall of the conical block.

[0013] The beneficial effects of the utility model are as follows: an active cavity is opened inside the piston rod, a driving rod is slidably arranged in the active cavity and extends out from one end, a supporting ring is arranged on the end of the driving rod that extends out, a conical block opposite to the oil hole is arranged on the supporting ring, a receiving groove is opened on the piston rod, a driving ring is arranged at the receiving groove, a connecting rod is arranged on the driving rod, the connecting rod is threadedly engaged with the internal thread of the positioning block through an external thread, a gear is sleeved on the connecting rod, a rack meshing with the gear is slidably connected with the active groove opened in the driving ring through an extension rod, the driving ring is rotated, the extension rod drives the rack to mesh with the gear for transmission, the connecting rod is rotated and translated, thereby allowing the conical block to approach or move away from the oil hole, and the oil flow through the oil hole is adjusted.

[0014] Compared with the prior art, the utility model avoids the problem that oil flows into the gap and affects the damping force adjustment effect. At the same time, the setting of the accommodating groove and the placing groove plays a certain protective role on the driving ring. The plug-in cooperation of the plug rod on the driving block and the slot on the driving ring avoids the situation that the oil is stuck and difficult to separate due to bumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram for showing the external structure of the oil storage cylinder in one embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram for showing some internal mechanisms of the oil storage cylinder in one embodiment of the utility model;

[0017] Figure 3 for Figure 2 A magnified view of part A;

[0018] Figure 4 This is an exploded view for showing some internal mechanisms of the oil storage cylinder in one embodiment of the utility model;

[0019] Figure 5 for Figure 4 A magnified view of part B;

[0020] Figure 6 for Figure 4 Enlarged view of part C;

[0021] Figure 7 This is a schematic diagram for separately showing the external part of the piston rod in one embodiment of the utility model;

[0022] Figure 8 for Figure 7 The structural diagram along the DD direction.

[0023] Reference numerals: 1, oil storage cylinder; 2, piston rod; 3, working cylinder; 4, piston; 5, oil hole; 6, movable cavity; 7, driving rod; 8, support ring; 9, conical block; 10, receiving groove; 11, driving ring; 12, connecting rod; 13, positioning block; 14, internal thread; 15, external thread; 16, gear; 17, rack; 18, extension rod; 19, movable groove; 20, placement groove; 21, driving block; 22, slot; 23, plug rod; 24, sliding groove; 25, sliding rod; 26, connecting plate; 27, guiding groove; 28, convex block; 29, knob; 30, friction pad; 31, telescopic spring; 32, sealing ring; 33, telescopic cover. Detailed implementation manners

[0024] The following is only the preferred implementation manner of the present invention, and the protection scope is not limited to this embodiment. Any technical solution within the idea of the present invention shall belong to the protection scope of the present invention. At the same time, it should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

[0025] It should be noted that in this article, relational terms such as first and second, such as "connecting plate one, connecting plate two", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0026] The orientation terms mentioned in this embodiment, such as "up, down, left, right", etc. are only used to assist those skilled in the art in this technical field to understand the connection between each feature or part, etc. with the help of each drawing.

[0027] In this embodiment, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] Such as Figures 1 to 8As shown in the figure, a single-tube adjustable shock absorber includes an oil storage cylinder 1 and a working cylinder 3 disposed therein. A piston rod 2 penetrates through the right end of the oil storage cylinder 1. The left end of the piston rod 2 penetrates into the interior of the working cylinder 3, and a piston 4 is provided at the left end of the piston rod 2. A number of groups of oil holes 5 are formed along the circumference of the piston 4. An activity cavity 6 is formed inside the piston rod 2. A driving rod 7 is slidably disposed inside the activity cavity 6. The left end of the driving rod 7 penetrates through the piston 4 and is located inside the working cylinder 3. A support ring 8 is provided at one end of the driving rod 7 located inside the working cylinder 3. A tapered block 9 is provided on the side of the support ring 8 facing the piston 4. A number of groups of tapered blocks 9 are provided, which are arranged opposite to the oil holes 5 one by one. In this embodiment, the oil holes 5 are circularly arranged. The outer diameter of the front end of the tapered block 9 is smaller than the inner diameter of the oil holes 5, and the outer diameter of the rear end of the tapered block 9 is larger than the inner diameter of the oil holes 5. The purpose is to block a certain area of the oil holes 5 and adjust the oil delivery of the oil holes 5. A sealing ring 32 is sleeved on the outer wall of the rear end of the tapered block 9. The purpose is to be able to completely block the oil holes 5. A telescopic cover 33 is sleeved on one end of the driving rod 7 located inside the working cylinder 3. The purpose is to prevent external oil from flowing into the activity cavity 6 through the gap between the driving rod 7 and the piston 4.

[0029] An annular receiving groove 10 is formed on the outer wall of the right end of the piston rod 2 located outside the oil storage cylinder 1. A driving ring 11 is rotatably disposed inside the receiving groove 10. A knob 29 is sleeved on the outer wall of the driving ring 11. The purpose is to facilitate rotation by personnel. For example, Figure 6 As shown in the figure, a placement groove 20 is formed on the left side of the inner wall of the receiving groove 10. An L-shaped driving block 21 is vertically slidably disposed inside the placement groove 20. Friction pads 30 are provided on the left and right sides of the driving block 21. A telescopic spring 31 is vertically disposed at the bottom side inside the placement groove 20. The upper end of the telescopic spring 31 is connected to the lower side of the driving block 21.

[0030] For example, Figures 2 to 3 As shown in the figure, a number of groups of slots 22 are formed along the circumferential direction on the left side of the outer wall of the driving ring 11. A plug rod 23 that is inserted and matched with the slots 22 is provided at the lower side of one end of the driving block 21 facing the driving ring 11. The purpose is to be able to limit the position of the driving ring 11.

[0031] For example, Figures 4 to 5As shown in the figure, a connecting rod 12 is rotatably arranged around its own central axis at the right end of the driving rod 7. A positioning block 13 is arranged at the inner right end of the moving cavity 6. An internal thread 14 is provided in the middle of the positioning block 13. External threads 15 that are screwed and matched with the internal thread 14 are arranged on the left and right of the connecting rod 12. A gear 16 is sleeved between the positioning block 13 and the driving rod 7 on the connecting rod 12. Moreover, a rectangular guiding groove 27 is provided on the upper side of the outer wall of the connecting rod 12 along its length direction. The middle part of the gear 16 is hollow. A convex block 28 is arranged on its inner wall and is slidably connected with the guiding groove 27. The gear 16 is connected to the inner wall of the moving cavity 6 through a connecting plate 26. A rack 17 that meshes and drives with the gear 16 is arranged in the moving cavity 6. An extension rod 18 is arranged on the upper side of the rack 17. One end of the extension rod 18 passes through the inside of the moving cavity 6 and is located in the receiving groove 10, as Figures 7 to 8 shown in the figure, an arc-shaped moving groove 19 is provided along the circumference on the inner wall of the driving ring 11. An arc-shaped sliding groove 24 is provided on the inner wall of the moving groove 19 along its length direction. The extension rod 18 is slidably connected with the sliding groove 24 through a sliding rod 25.

[0032] It should be noted that in this embodiment, the centers of the moving groove 19 and the sliding groove 24 are offset. The centers of the two are not coincident with the center of the connecting rod 12. The purpose is that when the driving ring 11 rotates, the sliding groove 24 will guide the extension rod 18 to move vertically up and down, so that the rack 17 and the gear 16 are meshed and driven.

[0033] When the personnel do not adjust the damping force, the telescopic spring 31 is in a retracted state. The driving block 21 is located inside the placement groove 20. At the same time, its insertion rod 23 is inserted into a group of slots 22 on the driving ring 11. The driving ring 11 is in a limited state. By placing the driving block 21 in the placement groove 20 and the driving ring 11 in the receiving groove 10, the problem that the connection part between the two is exposed outside and is easily damaged by external bumps is avoided. Through the plug-in method, the problem of damage and jamming is further avoided.

[0034] When adjustment is required by personnel, first pull up the driving block 21 to move it upward so that the inserting rod 23 moves out of the slot 22, and then rotate the driving ring 11. It should be noted that scales can be provided on the outer wall of the accommodating groove 10 along the circumferential direction of the piston rod 2 to facilitate the accuracy of personnel rotating the driving ring 11. When personnel rotate the driving ring 11, the sliding rod 25 slides in the sliding groove 24, and the extension rod 18 is driven to move vertically. The rack 17 starts to engage and drive with the gear 16. The gear 16 drives the connecting rod 12 to rotate around its own central axis. At the same time, the external thread 15 on it is screwed with the internal thread 14 on the positioning block 13, so that the connecting rod 12 moves in a rotational manner, pushing the driving rod 7 to move. Since the driving rod 7 is rotatably connected to the connecting rod 12, the driving rod 7 can move horizontally along the length direction of the piston rod 2. The support ring 8 is driven by the driving rod 7, and the position of the tapered block 9 on it changes in the oil hole 5, thereby changing the oil flow at the oil hole 5. The tapered block 9 is not directly placed at the oil hole 5 for sliding, avoiding gaps between the tapered block 9 and the oil hole 5.

[0035] The above embodiments are illustrative of the present invention, not restrictive thereof. Any simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A single-tube adjustable shock absorber, comprising an oil storage cylinder (1) and a working cylinder (3) arranged therein. One side of the oil storage cylinder (1) is provided with a piston rod (2) penetrating through it. One end of the piston rod (2) penetrates into the inner cavity of the working cylinder (3) and is provided with a piston (4). An oil hole (5) is formed on the piston (4). It is characterized in that An activity cavity (6) is formed inside the piston rod (2). A driving rod (7) is slidably arranged in the activity cavity (6). One end of the driving rod (7) penetrates through the piston (4) and is located in the inner cavity of the working cylinder (3). A support ring (8) is arranged at the position of the driving rod (7) in the inner cavity of the working cylinder (3). A conical block (9) opposite to the oil hole (5) is arranged on the support ring (8). One end of the piston rod (2) outside the oil storage cylinder (1) is provided with a receiving groove (10). A driving ring (11) is rotatably arranged in the receiving groove (10). One end of the driving rod (7) away from the piston (4) is provided with a connecting rod (12). A positioning block (13) is arranged in the activity cavity (6). An internal thread (14) is formed in the middle of the positioning block (13). An external thread (15) screwed with the internal thread (14) is arranged on the connecting rod (12). A gear (16) is sleeved on the outer wall of the connecting rod (12). The gear (16) is engaged and driven with a rack (17). One end of the rack (17) is provided with an extension rod (18). One end of the extension rod (18) penetrates out of the inside of the activity cavity (6). An arc-shaped activity groove (19) is formed along the circumference of the inner wall of the driving ring (11). One end of the extension rod (18) is slidably connected with the activity groove (19). The rotation of the driving ring (11) can indirectly drive the rack (17) to be engaged and driven with the gear (16) through the extension rod (18).

2. The single-tube adjustable shock absorber according to claim 1, characterized in that, A placing groove (20) is formed on the inner wall of the receiving groove (10). A driving block (21) is slidably arranged at the placing groove (20). A plurality of groups of slots (22) are formed along the circumferential direction of the outer wall of the driving ring (11). A plug rod (23) inserted and matched with the slots (22) is arranged on the driving block (21).

3. A single-tube adjustable shock absorber according to claim 1, characterized in that, An arc-shaped sliding groove (24) is formed along the length direction of the inner wall of the activity groove (19). The extension rod (18) is slidably connected with the sliding groove (24) through a sliding rod (25).

4. A single-tube adjustable shock absorber according to claim 1, characterized in that, The gear (16) is connected with the inner wall of the activity cavity (6) through a connecting plate (26). A guiding groove (27) is formed along the length of the connecting rod (12). A convex block (28) is arranged on the inner wall of the gear (16) and is slidably connected with the guiding groove (27).

5. A single-tube adjustable shock absorber according to claim 1, characterized in that, A knob (29) is sleeved on the outer wall of the driving ring (11).

6. A single-tube adjustable shock absorber according to claim 2, characterized in that, A friction pad (30) is arranged on the outer wall of the driving block (21). A telescopic spring (31) is arranged in the placing groove (20) and is connected with the bottom side of the driving block (21).

7. A single-tube adjustable shock absorber according to claim 1, characterized in that, One end of the driving rod (7) located inside the working cylinder (3) is sleeved with a telescopic cover (33). One end of the telescopic cover (33) is connected to the outer wall of the piston (4), and the other end is connected to the support ring (8). The outer wall of the bottom end of the conical block (9) is sleeved with a sealing ring (32).

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