Bidirectional pre-tightening type tension and compression spring buffering and damping mechanism

Abstract

A bidirectional pre-tightening type tension and compression spring buffering and damping mechanism comprises a tension and compression rod and a cover cylinder. The pulling and pressing rod comprises a connecting end, a working end and an adjusting end which are sequentially connected, the adjusting end is in threaded connection with an adjusting mechanism, and the moving stroke of the adjusting mechanism is that the adjusting mechanism axially moves along the adjusting end; the working end is sleeved with the lower pressing plate, the spring, the upper pressing plate and the upper end cover, the upper end cover is connected with the cover cylinder, and the lower end cover is arranged in the other end of the cover cylinder. When the pulling and pressing rod is subjected to pulling force or pressure exceeding the pre-tightening force, the spring provides a buffering and vibration reduction effect; different pre-tightening forces can be obtained by setting the position of the adjusting mechanism, so that the application range is wide; the adjusting mechanism is in threaded connection with the adjusting end, the adjusting mechanism can be moved only by rotating the adjusting mechanism, and therefore operation is convenient. Therefore, the design is wide in application range and convenient to operate.

Description

Technical Field

[0001] The invention relates to a buffer vibration reduction mechanism, belongs to the field of buffer vibration reduction, and in particular to a bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. The elasticity of the spring can usually be used to control the movement of mechanical parts, buffer and reduce vibration, store energy, etc. Under some specific working conditions in the field of buffer and vibration reduction, the buffer and vibration reduction mechanism is required to have the following two functions at the same time: ① When the pressure or tension does not exceed a certain preload, the spring does not produce relative displacement; ② When the pressure or tension exceeds a certain preload, the spring can buffer and reduce vibration of the pressure or tension.

[0003] The Chinese patent application number is 201710941388.9, and the application date is October 11, 2017. It discloses a bidirectional spring preload mechanism, in which the outer cylinder is a fixed support structure, the inner cylinder can slide axially in the outer cylinder, the compression spring is compressed by the pressure plate and has a certain preload force, the limit block 1 is installed on the pressure plate and can slide in the slide grooves of the outer cylinder and the inner cylinder, the limit block 2 is installed on the inner cylinder, the pressure plate and the piston fit together without gap, the piston is the motion output end, and can do stretching or compression movement. After the compression spring is preset with a certain pressure during installation, the piston needs to overcome the same size of preload force regardless of compression or stretching. Although this design enables the single spring to have the function of bidirectional preload, it still has the following defects: In this design, the length of the inner cylinder is fixed, so the preload compression length of the spring in the inner cylinder is fixed, and the size of the preload force generated by the spring is fixed, so this design cannot adapt to situations where different preload forces are required. Therefore, the application range of this design is relatively narrow.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects and problems of the narrow application range in the prior art and to provide a bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism with a wider application range.

[0006] To achieve the above objectives, the technical solution of the present invention is: A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism, the mechanism comprising a tension and compression rod and a cover cylinder; The tension and compression rod comprises a connecting end, a working end and an adjusting end which are connected in sequence, an adjusting mechanism is sleeved on the outer surface of the adjusting end, and the movement stroke of the adjusting mechanism is axial movement along the adjusting end; a side of the adjusting mechanism close to the working end is connected to a side of the lower pressing plate, the middle part of the lower pressing plate is sleeved on the working end, an end of a spring is connected to a side of the lower pressing plate away from the adjusting end, the middle part of the spring is sleeved on the outside of the working end, an end of the spring away from the lower pressing plate is connected to a side of the upper pressing plate, the middle part of the upper pressing plate is sleeved on the outside of the working end, and an upper end cover is arranged on the working end along the direction in which the upper pressing plate is away from the adjusting end; A connecting end is inserted into the upper end cover, the outer surface of the upper end cover is connected to one end of the cover tube, one end of the lower end cover is inserted into the end of the cover tube away from the upper end cover, and the end of the lower end cover close to the lower pressure plate is a limiting end.

[0007] External threads are evenly distributed on the outer surface of the adjustment end; and internal threads are evenly distributed on the inner surface of the adjustment mechanism.

[0008] The adjustment mechanism comprises a thin nut and a thick nut, one side of the thin nut is connected to a side of the lower pressure plate away from the spring, and the other side of the thin nut is connected to one side of the thick nut.

[0009] The limiting end comprises a limiting surface, an insertion hole is arranged in the middle of the limiting surface, and the movement stroke of the adjustment end is to move in the insertion hole along the axial direction of the insertion hole.

[0010] A plurality of adjustment holes are evenly distributed on the limit surface around the insertion hole, and an adjustment screw is inserted into the adjustment hole. The movement stroke of the adjustment end in the insertion hole is along the axial direction of the insertion hole, and the side of the adjustment screw away from the adjustment hole faces the side of the lower pressure plate.

[0011] One end of the adjustment hole away from the adjustment screw is connected to one end of the large adjustment hole, and the other end of the large adjustment hole is connected to the outside through the lower end cover. The diameter of the large adjustment hole is larger than the diameter of the adjustment hole.

[0012] The end of the lower end cover away from the limiting end is a lower fixed end, one side of the lower fixed end is connected to one side of the cover cylinder, and a lower connecting ring is provided in the middle of the side of the lower fixed end away from the cover cylinder.

[0013] A plurality of lower fixing holes are evenly distributed on the portion where the lower fixing end is connected to the cover tube, and a plurality of lower holes are arranged on the cover tube at positions corresponding to the lower fixing holes, and lower fixing screws are inserted into the lower holes and the lower fixing holes.

[0014] The end of the upper end cover away from the upper pressure plate is an upper fixed end, one side of the upper fixed end is connected to one side of the cover cylinder, and an upper connecting ring is arranged on the end of the connecting end away from the upper fixed end.

[0015] A plurality of upper fixing holes are evenly distributed on the portion where the upper fixing end is connected to the cover tube, and a plurality of upper holes are arranged on the cover tube at positions corresponding to the upper fixing holes, and upper fixing screws are inserted into the upper holes and the upper fixing holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In a bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism of the present invention, the mechanism includes a tension and compression rod and a cover tube, the tension and compression rod includes a connecting end, a working end and an adjusting end connected in sequence, the adjusting end is threadedly connected with an adjusting mechanism, the adjusting mechanism is connected to one side of a lower pressure plate, an upper pressure plate is sleeved on the end of the working end away from the adjusting mechanism, a spring is arranged between the upper pressure plate and the lower pressure plate, the outer parts of the upper pressure plate and the lower pressure plate are covered with a cover tube, an upper end cover and a lower end cover are arranged on the cover tube, and a limiting end is arranged on the lower end cover. When in use, the adjusting mechanism is first moved on the adjusting end, The adjustment mechanism then pushes the lower pressure plate to move, so the distance between the lower pressure plate and the upper pressure plate can be lengthened or shortened, and the length of the spring can be lengthened or shortened. The spring generates different preloads of different lengths, and the tension rod and the lower end cover are fixed to the corresponding devices respectively. When the pressure or tension on the tension rod is less than the preload, the spring does not move relatively. When the pressure or tension on the tension rod is greater than the preload, the tension rod drives the upper or lower pressure plate to move to squeeze the spring, and the spring generates elastic force to provide a buffering and vibration reduction effect. The advantages of the present invention also include: First point: the adjustment mechanism is moved to move the lower pressing plate, so the distance between the lower pressing plate and the upper pressing plate changes, and the length of the spring between the lower pressing plate and the upper pressing plate changes, that is, the compression length of the spring is changed. The preload force of the spring is the compression length multiplied by the elastic coefficient, so the preload force of the spring is changed; the preload force of the spring can be adjusted by changing the position of the adjustment mechanism, so the present invention can set the preload force as needed, and the application range is wide; Second point: the adjustment end and the adjustment mechanism are connected by threads, and the adjustment mechanism can be moved by simply rotating the adjustment mechanism. At the same time, the threaded connection can also achieve a good fixing effect between the adjustment mechanism and the adjustment end, so the present invention is easy to operate; The third point: when the pressure or tension on the tension and compression rod is greater than the preload, if the pressure or tension is a force in the direction away from the lower end cover, the tension and compression rod drives the lower pressure plate to move away from the lower end cover, and then the lower end cover squeezes the spring to make the spring produce damping motion to absorb and consume the pressure or tension, so as to achieve the buffering and vibration reduction function; if the pressure or tension is a force in the direction of the lower end cover, the tension and compression rod drives the upper pressure plate to move toward the lower end cover, and then the upper end cover squeezes the spring to make the spring produce damping motion to absorb and consume the pressure or tension, so as to achieve the buffering and vibration reduction function; therefore, the buffering and vibration reduction effect of the present invention is better; Therefore, the present invention has a wide application range and is easy to operate.

[0017] 2. In a bidirectional preloaded tension and compression spring buffer vibration reduction mechanism of the present invention, an adjustment hole and a large adjustment hole are provided on the limit end, an adjustment screw is inserted in the adjustment hole, the lower end cover is threadedly connected to the cover tube, and a lower connecting ring is also provided on the lower end cover. When the preload force needs to be fine-tuned, the adjustment screw is moved to make the adjustment screw move against the lower pressure plate, thereby slightly changing the position of the lower pressure plate, and thus slightly changing the distance between the lower pressure plate and the upper pressure plate, thereby achieving the effect of fine-tuning the preload force. Therefore, the present invention has the effect of fine-tuning the preload force.

[0018] 3. In a bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism of the present invention, the lower end cover is threadedly connected to the cover tube, a lower connecting ring is arranged on the lower end cover, the upper end cover is threadedly connected to the cover tube, and an upper connecting ring is arranged on the connecting end. When used, the upper end cover and the lower end cover are threadedly connected to the cover tube, which not only achieves a stable connection effect, but also allows for convenient removal and installation of the upper end cover and the lower end cover, that is, the tension and compression rod can be conveniently taken out of the cover tube, and then the adjustment mechanism can be moved to adjust the pre-tightening force; the upper connecting ring and the lower connecting ring are used to connect and cooperate with other equipment. Therefore, the connection of the present invention is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the present invention being subjected to a pressure greater than the preload force.

[0021] Figure 3 It is a schematic diagram of the present invention being subjected to a tensile force greater than the preload force.

[0022] Figure 4 yes Figure 1 Schematic diagram of the structure of the adjustment mechanism.

[0023] Figure 5 yes Figure 1 Exploded view of.

[0024] Figure 6 yes Figure 5 Schematic diagram of the structure of the upper pressure plate in FIG.

[0025] Figure 7 yes Figure 5 Schematic diagram of the structure of the thick nut.

[0026] Figure 8 yes Figure 5 Schematic diagram of the structure of the hood tube.

[0027] Fig. 9 yes Figure 5Schematic diagram of the structure of the lower end cover.

[0028] Fig.10 yes Figure 1 Schematic diagram of the structure of the stop step.

[0029] Fig.11 yes Figure 1 Schematic diagram of the structure of the limiting surface.

[0030] Fig.12 It is a structural schematic diagram of Example 2.

[0031] In the figure: tension and compression rod 1, connecting end 11, upper connecting ring 111, working end 12, lower pressure plate 121, spring 122, upper pressure plate 123, adjustment end 13, external thread 131, cotter pin 14, stop step 15, cover tube 2, lower hole 21, upper hole 22, adjustment mechanism 3, internal thread 31, thin nut 32, thick nut 33, upper end cover 4, upper fixed end 42, upper fixing hole 421, upper fixing screw 422, lower end cover 5, limiting end 51, limiting surface 511, insertion hole 512, adjustment hole 513, adjustment screw 514, large adjustment hole 515, lower fixed end 52, lower fixing hole 521, lower fixing screw 522, lower connecting ring 53. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] See also Figure 1 — Fig.12 , a bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism, the mechanism comprises a tension and compression rod 1 and a cover tube 2; The tension and compression rod 1 includes a connecting end 11, a working end 12 and an adjusting end 13 connected in sequence, an adjusting mechanism 3 is sleeved on the outer surface of the adjusting end 13, and the movement stroke of the adjusting mechanism 3 is axial movement along the adjusting end 13; a side of the adjusting mechanism 3 close to the working end 12 is connected to a side of a lower pressing plate 121, and the middle part of the lower pressing plate 121 is sleeved on the working end 12, and a side of the lower pressing plate 121 away from the adjusting end 13 is connected to one end of a spring 122, and the middle part of the spring 122 is sleeved on the outside of the working end 12, and the end of the spring 122 away from the lower pressing plate 121 is connected to a side of an upper pressing plate 123, and the middle part of the upper pressing plate 123 is sleeved on the outside of the working end 12, and an upper end cover 4 is provided on the working end 12 along the direction of the upper pressing plate 123 away from the adjusting end 13; The upper end cover 4 has a connecting end 11 inserted therein, the outer surface of the upper end cover 4 is connected to one end of the cover tube 2, one end of the lower end cover 5 is inserted therein at the end of the cover tube 2 away from the upper end cover 4, and the end of the lower end cover 5 close to the lower pressure plate 121 is a limiting end 51.

[0034] External threads 131 are evenly distributed on the outer surface of the adjustment end 13 ; internal threads 31 are evenly distributed on the inner surface of the adjustment mechanism 3 .

[0035] The adjustment mechanism 3 includes a thin nut 32 and a thick nut 33 . One side of the thin nut 32 is connected to a side of the lower pressing plate 121 away from the spring 122 , and the other side of the thin nut 32 is connected to one side of the thick nut 33 .

[0036] The limiting end 51 includes a limiting surface 511 , and an insertion hole 512 is provided in the middle of the limiting surface 511 . The movement stroke of the adjustment end 13 is to move in the insertion hole 512 along the axial direction of the insertion hole 512 .

[0037] A plurality of adjustment holes 513 are evenly distributed around the insertion hole on the limiting surface 511, and an adjustment screw 514 is inserted into the adjustment hole 513. The movement stroke of the adjustment end 13 in the insertion hole 512 is axial movement along the insertion hole 512, and the side of the adjustment screw 514 away from the adjustment hole 513 faces the side of the lower pressure plate 121.

[0038] One end of the adjustment hole 513 away from the adjustment screw 514 is connected to one end of the adjustment large hole 515 , and the other end of the adjustment large hole 515 passes through the lower end cover 5 to communicate with the outside world. The diameter of the adjustment large hole 515 is larger than the diameter of the adjustment hole 513 .

[0039] The end of the lower end cover 5 away from the limiting end 51 is a lower fixed end 52 , one side of the lower fixed end 52 is connected to one side of the cover tube 2 , and a lower connecting ring 53 is provided in the middle of the side of the lower fixed end 52 away from the cover tube 2 .

[0040] A plurality of lower fixing holes 521 are evenly distributed on the portion where the lower fixing end 52 is connected to the cover tube 2 , a plurality of lower holes 21 are provided on the cover tube 2 at positions corresponding to the lower fixing holes 521 , and lower fixing screws 522 are inserted into the lower holes 21 and the lower fixing holes 521 .

[0041] The end of the upper end cover 4 away from the upper pressure plate 123 is an upper fixed end 42 , one side of the upper fixed end 42 is connected to one side of the cover tube 2 , and an upper connecting ring 111 is provided on the end of the connecting end 11 away from the upper fixed end 42 .

[0042] A plurality of upper fixing holes 421 are evenly distributed on the portion where the upper fixing end 42 is connected to the cover tube 2 , a plurality of upper holes 22 are arranged on the cover tube 2 at positions corresponding to the upper fixing holes 421 , and upper fixing screws 422 are inserted into the upper holes 22 and the upper fixing holes 421 .

[0043] The supplementary description of the present invention is as follows: The preload force described in the present invention is: before the spring 122 is installed, the upper pressure plate 123 and the lower pressure plate 121 are used to squeeze the spring 122 so that an initial elastic force is generated on the spring 122, and the elastic force is the preload force; when the pressure or tension does not exceed the preload force, the pressure or tension will not pull or compress the spring 122; when the pressure or tension exceeds the preload force, the spring 122 is compressed or elongated to play a buffering and vibration reduction role.

[0044] Embodiment 1: See also Figure 1 — Fig.12 , a bidirectional pre-tightening tension and compression spring buffering and vibration reduction mechanism, the mechanism includes a tension and compression rod 1 and a cover tube 2; the tension and compression rod 1 includes a connecting end 11, a working end 12 and an adjusting end 13 connected in sequence, an adjusting mechanism 3 is sleeved on the outer surface of the adjusting end 13, and the movement stroke of the adjusting mechanism 3 is axial movement along the adjusting end 13; the side of the adjusting mechanism 3 close to the working end 12 is connected to the side of the lower pressing plate 121, the middle part of the lower pressing plate 121 is sleeved on the working end 12, and the side of the lower pressing plate 121 away from the adjusting end 13 is connected to one end of a spring 122, the middle part of the spring 122 is sleeved on the outside of the working end 12, the end of the spring 122 away from the lower pressing plate 121 is connected to a side of an upper pressing plate 123, the middle part of the upper pressing plate 123 is sleeved on the outside of the working end 12, and an upper end cover 4 is arranged on the working end 12 along the direction of the upper pressing plate 123 away from the adjusting end 13; The upper end cover 4 is inserted with a connecting end 11, and the outer surface of the upper end cover 4 is connected to one end of the cover tube 2. One end of the lower end cover 5 is inserted into the end of the cover tube 2 away from the upper end cover 4, and the end of the lower end cover 5 close to the lower pressure plate 121 is a limiting end 51. The outer surface of the adjustment end 13 is evenly distributed with external threads 131; the inner surface of the adjustment mechanism 3 is evenly distributed with internal threads 31. The adjustment mechanism 3 includes a thin nut 32 and a thick nut 33, one side of the thin nut 32 is connected to the side of the lower pressure plate 121 away from the spring 122, and the other side of the thin nut 32 is connected to one side of the thick nut 33. Preferably, the lower pressure plate 121 is connected to the spring 122 through the stop step 15, and the upper pressure plate 123 is connected to the spring 122 through the stop step 15. Preferably, the diameter of the connecting end 11 is larger than the diameter of the working end 12, and the diameter of the connecting end 11 is larger than the diameter of the hole in the middle of the upper pressure plate 123. Preferably, a cotter pin 14 is also provided on the adjustment end 13 .

[0045] When in use, first screw the thin nut 32 and the thick nut 33 in sequence to move the thin nut 32 and the thick nut 33 on the adjustment end 13 until the upper pressure plate 123 and the lower pressure plate 121 squeeze the spring 122 to generate a preload; when a larger preload is needed, the thin nut 32 and the thick nut 33 are located at one end of the adjustment end 13 close to the upward pressure plate 123, so the distance between the lower pressure plate 121 and the upper pressure plate 123 is smaller, then the upper pressure plate 123 and the lower pressure plate 121 squeeze the spring 122 to a greater extent, and the spring 122 can generate a larger preload; when a medium preload is needed, the thin nut 32 and the thick nut 33 are located in the middle of the adjustment end 13, so the distance between the lower pressure plate 121 and the upper pressure plate 123 is smaller. When the distance between the upper and lower pressing plates 123 and 121 is medium, the compression degree of the upper and lower pressing plates 123 and 121 on the spring 122 is medium, and the spring 122 can generate a medium preload force. When a smaller preload force is needed, the thin nut 32 and the thick nut 33 are located on the end of the adjustment end 13 away from the upward pressing plate 123. Therefore, the distance between the lower pressing plate 121 and the upper pressing plate 123 is large, and the compression degree of the upper and lower pressing plates 123 and 121 on the spring 122 is small, and the spring 122 can generate a smaller preload force. If there is a clear preload force value, divide the preload force value by the elastic coefficient of the spring 122 to obtain the compressed length of the spring 122, and then adjust the distance between the upper and lower pressing plates 123 and 121 according to the compressed length. The connecting end 11 and the lower end cover 5 are respectively connected to the corresponding equipment. When the connecting end 11 is subjected to tension, when the tension is less than the preload force, the spring 122 does not move relatively. When the tension is greater than the preload force, the connecting end 11 drives the working end 12 and the adjusting end 13 to move in the direction of the tension in turn, and then the adjusting mechanism 3 drives the lower pressing plate 121 to move in the direction of the tension. At this time, one side of the upper pressing plate 123 is against the upper end cover 4, so the upper end cover 4 forms a limit on the upper pressing plate 123, and the distance between the lower pressing plate 121 and the upper pressing plate 123 is reduced, so the lower pressing plate 121 and the upper pressing plate 123 squeeze the spring 122, and the spring 122 generates elastic force to buffer and reduce vibration of the tension. When the connecting end 11 is subjected to pressure When in use, when the pressure is less than the preload force, at this time, the spring 122 does not move relatively. When the pressure is greater than the preload force, the connecting end 11 drives the working end 12 and the adjusting end 13 to move in the pressure direction in turn, and then the working end 12 drives the upper pressing plate 123 to move in the pressure direction. At this time, the diameter of the connecting end 11 is greater than the diameter of the hole in the middle of the upper pressing plate 123, so the connecting end 11 forms a limit for the upper pressing plate 123, and one side of the lower pressing plate 121 is against the limit end 41, so the limit end 41 forms a limit for the lower pressing plate 121, then the distance between the lower pressing plate 121 and the upper pressing plate 123 is reduced, then the lower pressing plate 121 and the upper pressing plate 123 squeeze the spring 122, and the spring 122 generates elastic force to buffer and reduce the pressure;The diameter of the spring 122 is slightly smaller than the lower pressing plate 121 and the upper pressing plate 123 to prevent the spring 122 from rigidly contacting the cover tube 2 and eccentrically deviating from the cover tube 2. The outer surfaces of the lower pressing plate 121 and the upper pressing plate 123 are clearance-matched with the inner surface of the cover tube 2. The lower pressing plate 121 and the upper pressing plate 123 are both provided with stop steps 15, which are connected to the spring 122 through the stop steps 15, so that the spring 122 is reliably centered and does not tilt and force the spring 122; the thin nut 32 and the thick nut 33 are used at the same time to improve the stability of the fixing of the lower pressing plate 121, and the cotter pin 14 is used to prevent the thin nut 32 and the thick nut 33 from loosening. ;

[0046] Embodiment 2: The basic content is the same as that of Example 1, except that: See also Figure 1 — Fig.12 The limiting end 51 includes a limiting surface 511, and an insertion hole 512 is provided in the middle of the limiting surface 511. The movement stroke of the adjustment end 13 in the insertion hole 512 is to move along the axial direction of the insertion hole 512. A plurality of adjustment holes 513 are evenly distributed around the insertion hole on the limiting surface 511. An adjustment screw 514 is inserted into the adjustment hole 513. The movement stroke of the adjustment screw 514 is to move along the axial direction of the adjustment hole 513 in the adjustment hole 513. The side of the adjustment screw 514 away from the adjustment hole 513 faces the side of the lower pressing plate 121. One end of the adjustment hole 513 away from the adjustment screw 514 is connected to one end of the large adjustment hole 515. The other end of the large adjustment hole 515 passes through the lower end cover 5 and is connected to the outside. The diameter of the large adjustment hole 515 is larger than the diameter of the adjustment hole 513.

[0047] During application, when the connecting end 11 is subjected to pressure, the adjusting end 13 moves in the direction of pressure, so the adjusting end 13 enters the insertion hole 512, and the insert hole 512 provides the movable range of the adjusting end 13; when it is necessary to fine-tune the preload force, the adjusting device is extended into the large adjusting hole 515, and then the adjusting device is connected to the adjusting screw 514, and then the adjusting device moves the adjusting screw 514 along the adjusting hole 513, so that the end of the adjusting screw 514 located outside the adjusting hole 513 moves, that is, the adjusting screw 514 protrudes from the limiting surface 511, and at this time, the lower pressure plate 121 is supported by the adjusting screw 514 to fine-tune the distance between the lower pressure plate 121 and the upper pressure plate 123; there are multiple adjusting screws 514, and the sides of all the adjusting screws 514 protruding outside the limiting surface 511 are located on the same horizontal plane, so that the force on the lower pressure plate 121 is flat and uniform.

[0048] Embodiment 3: The basic content is the same as that of Example 1, except that: See also Figure 1 — Fig.12The end of the lower end cover 5 away from the limiting end 51 is the lower fixed end 52, one side of the lower fixed end 52 is connected to one side of the cover tube 2, and a lower connecting ring 53 is provided in the middle of the side of the lower fixed end 52 away from the cover tube 2. A plurality of lower fixing holes 521 are evenly distributed on the part where the lower fixed end 52 is connected to the cover tube 2, and a plurality of lower holes 21 are provided at positions corresponding to the lower fixing holes 521 on the cover tube 2, and lower fixing screws 522 are inserted into the lower holes 21 and the lower fixing holes 521. The end of the upper end cover 4 away from the upper pressure plate 123 is the upper fixed end 42, one side of the upper fixed end 42 is connected to one side of the cover tube 2, and an upper connecting ring 111 is provided on the end of the connecting end 11 away from the upper fixed end 42. A plurality of upper fixing holes 421 are evenly distributed on the portion where the upper fixing end 42 is connected to the cover tube 2 , a plurality of upper holes 22 are arranged on the cover tube 2 at positions corresponding to the upper fixing holes 421 , and upper fixing screws 422 are inserted into the upper holes 22 and the upper fixing holes 421 .

[0049] When the preload needs to be adjusted during use, first remove the upper fixing screw 422 from the upper fixing hole 421 and the upper hole 22 in sequence, then remove the upper end cover 4, then hold the connecting end 11 to pull the tension and compression rod 1 out of the cover tube 2, then make the thin nut 32 and the thick nut 33 be located at the appropriate position of the adjustment end 13, then put the tension and compression rod 1 into the cover tube 2, and then make the upper end cover 4 press the upper pressure plate 123 into the cover tube 2, and then insert all the upper fixing screws 422 into the upper fixing hole 421 and the upper hole 22 in sequence to fix the upper fixing end 42 It is fixed to the cover tube 2, thereby realizing the fixation of the upper end cover 4; when the lower end cover 5 needs to be removed, the lower fixing screws 522 are first taken out from the lower fixing holes 521 and the lower holes 21 in turn, and the lower end cover 5 can be taken out from the cover tube 2. When the lower end cover 5 needs to be fixed, the limiting end 51 is first pushed into the cover tube 2, and then the lower fixing hole 521 is aligned with the lower hole 21, and then all the lower fixing screws 522 are inserted into the lower fixing holes 521 and the lower hole 21 in turn to fix the lower fixing end 52 to the cover tube 2, thereby realizing the fixation of the lower end cover 5.

[0050] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism, characterized in that: The mechanism comprises a tension and compression rod (1) and a cover tube (2); The tension and compression rod (1) comprises a connecting end (11), a working end (12) and an adjusting end (13) which are connected in sequence. An adjusting mechanism (3) is sleeved on the outer surface of the adjusting end (13). The movement stroke of the adjusting mechanism (3) is axial movement along the adjusting end (13). A side of the adjusting mechanism (3) close to the working end (12) is connected to a side of a lower pressing plate (121). The middle part of the lower pressing plate (121) is sleeved on the working end (12). 21) one end of a spring (122) is connected to a surface away from the adjustment end (13), the middle portion of the spring (122) is sleeved on the outside of the working end (12), one end of the spring (122) away from the lower pressing plate (121) is connected to a surface of an upper pressing plate (123), the middle portion of the upper pressing plate (123) is sleeved on the outside of the working end (12), and an upper end cover (4) is provided on the working end (12) along the upper pressing plate (123) in a direction away from the adjustment end (13); A connecting end (11) is inserted into the upper end cover (4), and an outer surface of the upper end cover (4) is connected to one end of the cover tube (2). One end of the lower end cover (5) is inserted into the end of the cover tube (2) away from the upper end cover (4), and the end of the lower end cover (5) close to the lower pressure plate (121) is a limiting end (51).

2. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 1, characterized in that: External threads (131) are evenly distributed on the outer surface of the adjustment end (13); and internal threads (31) are evenly distributed on the inner surface of the adjustment mechanism (3).

3. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 2, characterized in that: The adjustment mechanism (3) comprises a thin nut (32) and a thick nut (33), one side of the thin nut (32) is connected to a side of the lower pressing plate (121) away from the spring (122), and the other side of the thin nut (32) is connected to one side of the thick nut (33).

4. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 1, 2 or 3, characterized in that: The limiting end (51) comprises a limiting surface (511), an insertion hole (512) is provided in the middle of the limiting surface (511), and the movement stroke of the adjustment end (13) in the insertion hole (512) is axial movement along the insertion hole (512).

5. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 4, characterized in that: A plurality of adjustment holes (513) are evenly distributed around the insertion hole on the upper edge of the limiting surface (511), an adjustment screw (514) is inserted into the adjustment hole (513), and the movement stroke of the adjustment screw (514) is to move axially along the adjustment hole (513) in the adjustment hole (513), and the side of the adjustment screw (514) away from the adjustment hole (513) faces the side of the lower pressing plate (121).

6. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 5, characterized in that: One end of the adjustment hole (513) away from the adjustment screw (514) is connected to one end of the large adjustment hole (515), and the other end of the large adjustment hole (515) passes through the lower end cover (5) to communicate with the outside, and the diameter of the large adjustment hole (515) is greater than the diameter of the adjustment hole (513).

7. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 1, 2 or 3, characterized in that: One end of the lower end cover (5) away from the limiting end (51) is a lower fixed end (52), one side of the lower fixed end (52) is connected to one side of the cover cylinder (2), and a lower connecting ring (53) is provided in the middle of the side of the lower fixed end (52) away from the cover cylinder (2).

8. The bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 7, characterized in that: A plurality of lower fixing holes (521) are evenly distributed on the portion where the lower fixing end (52) is connected to the cover tube (2); a plurality of lower holes (21) are provided on the cover tube (2) at positions corresponding to the lower fixing holes (521); and lower fixing screws (522) are inserted into the lower holes (21) and the lower fixing holes (521).

9. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 8, characterized in that: The end of the upper end cover (4) away from the upper pressure plate (123) is an upper fixed end (42), one side of the upper fixed end (42) is connected to one side of the cover cylinder (2), and an upper connecting ring (111) is provided on the end of the connecting end (11) away from the upper fixed end (42).

10. A bidirectional pre-tightening tension and compression spring buffer vibration reduction mechanism according to claim 9, characterized in that: A plurality of upper fixing holes (421) are evenly distributed on the portion where the upper fixing end (42) is connected to the cover tube (2); a plurality of upper holes (22) are provided on the cover tube (2) at positions corresponding to the upper fixing holes (421); and upper fixing screws (422) are inserted into the upper holes (22) and the upper fixing holes (421).

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