High-strength automobile shock absorber inner pipe and clamp for machining

Abstract

The invention discloses a high-strength automobile shock absorber inner pipe and a clamp for machining, an inner pipe body comprises the following material components: 0.35% of carbon, 0.27% of silicon, 1.38% of manganese, 0.009% of phosphorus, 0.002% of sulfur, 0.0023% of boron, 0.17% of chromium, 0.03% of aluminum, 0.05% of titanium, 0.02% of copper and the balance of ferrum, in daily use, by adopting the technical scheme, the yield strength of the manufactured inner pipe body is greater than or equal to 1397Mpa, and the yield strength of the manufactured inner pipe body is greater than or equal to 1397Mpa. And compared with an inner pipe body made of 26MnB5 steel, the yield strength of the inner pipe body is improved by 15%.

Description

Technical Field

[0001] The invention relates to the field of automobile and motorcycle shock absorption, in particular to a high-strength automobile and motorcycle shock absorber inner tube and a processing fixture. Background Art

[0002] Shock absorbers are widely used in the fields of automobiles and motorcycles to cushion the impact vibrations on drivers and passengers caused by the impact of vehicles when they are running. Automobile and motorcycle shock absorbers mainly include an outer tube, an inner tube, an oil seal, an oil seal retaining ring, an outer tube guide sleeve, an inner tube guide sleeve and a spring.

[0003] The yield strength of the inner tube of the mainstream automobile shock absorber made of 26MnB5 in the prior art is ≥1250Mpa. In order to strengthen the rigidity of the shock absorber and increase its bending resistance, the method of increasing the diameter of the outer tube and the inner tube is generally adopted. However, this method does not have an obvious effect on increasing rigidity and bending resistance, so it is necessary to make improvements. Summary of the invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art.

[0005] The present application provides a high-strength automobile and motorcycle shock absorber inner tube, which includes an inner tube body with an oil hole, wherein the inner tube body is made of 34MnB5 steel, and the material components of the 34MnB5 steel are: 0.35%~0.34% carbon, 0.27% silicon, 1.38%~1.33% manganese, 0.009%~0.01% phosphorus, 0.002%~0.001% sulfur, 0.0023%~0.0021% boron, 0.17% chromium, 0.03%~0.024% aluminum, 0.05%~0.037% titanium, 0.02% copper and the remaining weight portion of iron.

[0006] The inner tube body is made of 34MnB5 steel, and the material components are: 0.35% carbon, 0.27% silicon, 1.38% manganese, 0.009% phosphorus, 0.002% sulfur, 0.0023% boron, 0.17% chromium, 0.03% aluminum, 0.05% titanium, 0.02% copper and the remaining weight portion of iron.

[0007] The inner tube body is made of 34MnB5 steel, and the material components are: 0.34% carbon, 0.27% silicon, 1.33% manganese, 0.01% phosphorus, 0.001% sulfur, 0.0021% boron, 0.17% chromium, 0.024% aluminum, 0.037% titanium, 0.02% copper and the remaining weight portion of iron.

[0008] Also disclosed is a high-strength automobile and motorcycle shock absorber inner tube processing fixture, including a frame consisting of a bottom plate and two vertical plates, and also includes: A pair of inner clamping devices are respectively installed on the inner side of each vertical plate, and are used to clamp and fix the inner cavity of the inner tube body, and are driven by a motor to move synchronously.

[0009] The inner clamping device includes: A sliding hole, which penetrates the vertical plate and has a telescopic piston slidably installed inside; An expansion ring, which is detachably mounted on one end of the telescopic piston; A bulging mechanism, which is used to control the bulging ring to bulge outwards; The hydraulic mechanism is used to control the sliding of the telescopic piston in the sliding hole and control the action of the expansion mechanism at the same time.

[0010] Bulging mechanisms include: A connecting cavity, which is arranged on the end surface of the telescopic piston away from the expansion ring; A first ring groove, which is arranged at the outer end of the outer peripheral wall of the telescopic piston; A plurality of expansion blocks are movably mounted on the outside of the telescopic piston and are controlled by a plurality of hydraulic transmission mechanisms to move in the radial direction of the telescopic piston; Among them, each hydraulic transmission mechanism is connected to the connecting chamber, and the action is controlled by the hydraulic mechanism.

[0011] The hydraulic transmission mechanism includes: A pair of connecting holes, one end of which is symmetrically arranged on the opposite side walls of the annular groove 1, and the other end of which is connected to the connecting cavity; A pair of piston rods are slidably mounted in the connecting holes, with adjacent ends extending into annular groove 1 and a spring 1 disposed therebetween; Two pairs of connecting rods are arranged in an "eight" shape and are used to drive the expansion block to a pair of piston rods.

[0012] The hydraulic mechanism includes: A hydraulic housing is fixed on the outer side wall of the vertical plate, and its inner cavity is connected with the outer end of the sliding hole; A plurality of telescopic blocks are slidably inserted on the peripheral wall of the hydraulic housing; A swivel ring is rotatably sleeved on the outer peripheral wall of the hydraulic housing and is transmission-connected to each telescopic block through an arc groove and a transmission block; A plurality of springs are mounted between the hydraulic housing and the outer ends of each telescopic block through a pair of vertical plates; The adjustable stroke rotary drive unit is driven by a motor and is used to control the rotation of the swivel.

[0013] Adjustable stroke rotary drive unit includes: A driven tooth group, which is arranged on one side of the rotating ring surface; A fan-shaped fixed plate, one end of which is fixedly connected to the output shaft of the motor, and the other end of which is provided with a driving tooth set; The fan-shaped movable plate has one end which can be rotatably mounted on the output shaft of the motor, and the overlapping area with the fan-shaped fixed plate can be adjusted by an adjusting member, and the other end is provided with a second active tooth set; The first driving tooth group and the second driving tooth group are both meshed with the driven tooth group for transmission.

[0014] Adjustment parts include: Arc slot 2, which is arranged on the fan-shaped movable plate and is concentric with the output shaft of the motor; A plurality of circular grooves are arranged at intervals on the fan-shaped movable plate and distributed along the arc groove; The locking nut has a bolt portion that can pass through the second arc groove and be threadedly connected with the fan-shaped fixed plate through a threaded hole, and a nut portion that can be engaged with one of the circular grooves to fix the fan-shaped movable plate.

[0015] Telescopic piston includes: The piston body is slidably mounted in the sliding hole, and a movable annular protrusion is fixedly arranged on the outer peripheral wall; A second ring groove is provided on the peripheral wall of the piston body and is used for inserting one end of the expansion ring; A screw hole is provided at the outer end of the piston body; A buckle cap is fixed to the outer end of the piston body through threaded cooperation with the screw hole, and is used to fix the other end of the expansion ring; Wherein, a fixing ring convex is arranged at the inner end of the sliding hole.

[0016] The buckle cap comprises: A connecting column having an inner cavity and a pressure edge fixed at one end of an outer peripheral wall; A pair of through holes are provided on the outer wall of the pressing edge and communicate with the inner cavity; A pair of side grooves are provided on the side walls of the connecting column and communicate with the inner cavity; A pair of bottom grooves are arranged at the end of the connecting column away from the pressing edge; A pair of L-shaped sliders are slidably mounted in the inner cavity, each through hole, each side groove and each bottom groove, and springs are arranged between them; Wherein, an external thread for matching with the screw hole is arranged on the outer side wall of each L-shaped sliding block.

[0017] Also includes: A floating hole is arranged at the inner end of the screw hole, and a floating block is installed therein in a floating manner through a spring; A plurality of trapezoidal blocks are fixedly arranged at the outer end of the floating block at intervals along the circumferential direction, and one side wall of the blocks is inclined; A plurality of trapezoidal grooves are arranged on the end surfaces of the L-shaped sliding blocks extending out of the bottom grooves, and are inclined with the side walls adjacent to the trapezoidal blocks.

[0018] The beneficial effects of the present invention are as follows: 1. The yield strength of the inner tube body composed of 0.35% to 0.34% carbon, 0.27% silicon, 1.38% to 1.33% manganese, 0.009% to 0.01% phosphorus, 0.002% to 0.001% sulfur, 0.0023% to 0.0021% boron, 0.17% chromium, 0.03% to 0.024% aluminum, 0.05% to 0.037% titanium, 0.02% copper and the remaining weight percentage of iron is ≥1397Mpa; 2. Through the setting of sliding hole, telescopic piston, expansion mechanism and hydraulic mechanism, it reaches into the inner cavity of the inner tube body, applies force from inside to outside to clamp and fix the inner tube body, so as to avoid the problem of large internal vibration around the processing position; 3. The expansion degree of the expansion mechanism is controlled by setting a hydraulic housing, a plurality of telescopic blocks, a rotating ring, a plurality of arc grooves 1, a plurality of transmission blocks, a plurality of springs 2, a driven tooth group, a fan-shaped fixed plate, an active tooth group 1, a fan-shaped movable plate, an active tooth group 2, an adjusting member and a motor to adapt to the fixation of the inner tube body with different inner diameters, and the clamping force can be adjusted to improve the clamping stability of the shock-absorbing inner tube; 4. Through the arrangement of the second ring groove, the screw hole, the connecting column, the pair of through holes, the pair of side grooves, the pair of bottom grooves, the pair of L-shaped sliders and the third spring, it is convenient to replace the vulnerable part of the expansion ring and to maintain the equipment; 5. Through the setting of floating holes, a plurality of trapezoidal blocks and a plurality of trapezoidal grooves, a pair of L-shaped sliders are used to lock the connecting column to prevent the connecting column from reversing and falling off, thereby improving the installation stability of the expansion ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a fixture for processing an inner tube of a high-strength automobile and motorcycle shock absorber in an embodiment of the present application; Figure 2 This is a partial enlarged view of a fixture for processing the inner tube of a high-strength automobile and motorcycle shock absorber in an embodiment of the present application (outside of the vertical plate); Figure 3 This is a three-dimensional display diagram of the internal structure of the telescopic piston in the embodiment of the present application; Figure 4 It is a partial stereoscopic diagram of the hydraulic transmission mechanism in the embodiment of the present application; Figure 5 A partial enlarged view of a fixture for processing the inner tube of a high-strength automobile and motorcycle shock absorber in an embodiment of the present application (inside of a vertical plate); Figure 6 This is a three-dimensional diagram of the coordination state between the rotating ring and each telescopic block in the embodiment of the present application; Figure 7 This is a three-dimensional diagram of the structure of the adjustable stroke rotation drive unit in the embodiment of the present application; Figure 8 This is a three-dimensional display diagram of the internal structure of the buckle cap in the embodiment of the present application; Fig. 9 This is a three-dimensional display diagram of the back structure of the buckle cap in the embodiment of the present application.

[0020] Reference numerals 100-oil hole, 200-inner tube body, 1-frame, 11-bottom plate, 12-vertical plate, 2-motor, 3-sliding hole, 4-telescopic piston, 41-piston body, 42-movable ring convex, 43-ring groove 2, 44-screw hole, 45-buckle cap, 451-connecting column, 452-pressure edge, 453-through hole, 454-side groove, 455-bottom groove, 456-L-shaped slider, 457-spring 3, 5-bulging ring, 6-bulging mechanism, 61-connecting cavity, 62-ring groove 1, 63-bulging block, 64-hydraulic transmission mechanism, 641-connecting hole, 642-piston rod, 643-spring 1, 644-connecting rod, 7-hydraulic mechanism, 71-hydraulic shell, 72-telescopic block, 73-swivel, 74-arc groove 1, 75-spring 2, 76-vertical plate, 77-adjustable stroke rotation drive unit, 771-driven tooth group, 772-fan-shaped fixed plate, 773-active tooth group 1, 774-fan-shaped movable plate, 775-active tooth group 2, 8-adjusting member, 81-arc groove 2, 82-circular groove, 83-locking nut, 91-floating hole, 92-floating block, 93-trapezoidal block, 94-trapezoidal groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] The following is a detailed description of the high-strength automobile and motorcycle shock absorber inner tube processing fixture provided in the embodiment of the present application through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0024] Embodiment 1: The embodiment of the present application provides a high-strength automobile and motorcycle shock absorber inner tube, which includes an inner tube body 200 with an oil hole 100, and the inner tube body is made of 34MnB5 steel. The material components of the 34MnB5 steel are: 0.35%~0.34% carbon, 0.27% silicon, 1.38%~1.33% manganese, 0.009%~0.01% phosphorus, 0.002%~0.001% sulfur, 0.0023%~0.0021% boron, 0.17% chromium, 0.03%~0.024% aluminum, 0.05%~0.037% titanium, 0.02% copper and the remaining weight percentage of iron.

[0025] Specifically, two sets of specifications are provided: The first group: The specifications are diameter 43.4mm, wall thickness 2.05mm, and length 575mm. The material composition of the inner tube body is: 0.35% carbon, 0.27% silicon, 1.38% manganese, 0.009% phosphorus, 0.002% sulfur, 0.0023% boron, 0.17% chromium, 0.03% aluminum, 0.05% titanium, and 0.02% copper. The tensile strength (Rm) of the inner tube body is 1458~1427Mpa, the yield strength (Rel) is 1444~1397 Mpa, and the elongation (A) is 12.5%.

[0026] The second group: The specifications are diameter 39.4mm, wall thickness 2.125mm, and length 575mm. The material composition of the inner tube body is: 0.34% carbon, 0.27% silicon, 1.33% manganese, 0.01% phosphorus, 0.001% sulfur, 0.0021% boron, 0.17% chromium, 0.024% aluminum, 0.037% titanium, and 0.02% copper. The tensile strength (Rm) of the inner tube body is 1453~1476Mpa, the yield strength (Rel) is 1444~1435 Mpa, and the elongation (A) is 11.5%~12%.

[0027] Control group: made of 26MnB5 steel, with specifications of diameter 48mm, wall thickness 1.5mm, length 600mm. The material composition of the inner tube body is: 0.27% carbon, 0.28% silicon, 1.36% manganese, 0.016% phosphorus, 0.004 sulfur, 0.002% boron, 0.14% chromium, 0.03% aluminum, 0.04% titanium, 0.05% copper. The tensile strength (Rm) of the inner tube body is ≥1400Mpa, the yield strength (Rel) is ≥1250Mpa, and the elongation (A) is 11%-16%.

[0028] Embodiment 2: like Figures 1 to 4As shown, an embodiment of the present application provides a fixture for processing the inner tube of a high-strength automobile and motorcycle shock absorber, including a frame 1 composed of a base plate 11 and two vertical plates 12, and also includes a pair of internal clamping devices, which are respectively installed on the inner side of each vertical plate 12, and are used to clamp and fix the inner cavity of the inner tube body 200, and are driven by a motor 2 for synchronous movement.

[0029] Furthermore, the internal clamping device includes a sliding hole 3, which passes through the vertical plate 12, and a telescopic piston 4 is slidably installed inside; an expansion ring 5, which is detachably installed at one end of the telescopic piston 4; an expansion mechanism 6, which is used to control the expansion of the expansion ring 5 outward; a hydraulic mechanism 7, which is used to control the telescopic piston 4 to slide in the sliding hole 3 and control the action of the expansion mechanism 6 at the same time.

[0030] Furthermore, the expansion mechanism 6 includes a connecting cavity 61, which is arranged on the end surface of the telescopic piston 4 away from the expansion ring 5; a ring groove 62, which is arranged at the outer end of the outer peripheral wall of the telescopic piston 4; a plurality of expansion blocks 63, which are movably installed on the outer side of the telescopic piston 4, and are controlled by a plurality of hydraulic transmission mechanisms 64 to move along the radial direction of the telescopic piston 4. Each hydraulic transmission mechanism 64 is connected to the connecting cavity 61, and the movement is controlled by the hydraulic mechanism 7.

[0031] Furthermore, the hydraulic transmission mechanism 64 includes a pair of connecting holes 641, one end of which is symmetrically arranged on the opposite side walls of the annular groove 62, and the other end is connected to the connecting cavity 61; a pair of piston rods 642, which are slidably installed in each connecting hole 641, and the adjacent ends extend into the annular groove 62 and a spring 643 is provided therebetween; two pairs of connecting rods 644 are arranged in an "eight" shape, and are used to make the bulging block 63 and the pair of piston rods 642 drive connected.

[0032] In this embodiment of the present application, due to the adoption of the above-mentioned structure, there is hydraulic oil in the sliding hole 3, the connecting cavity 61 and each connecting hole 641, the inner tube body 200 to be clamped is placed between a pair of standing plates 12, the two ends are aligned with the telescopic pistons 4 of the inner clamping device on both sides, and then the hydraulic mechanism 7 is actuated, the hydraulic pressure is supplied to the sliding hole 3, and each telescopic piston 4 is pushed into the inner cavity of the inner tube body 200, and the telescopic piston 4 is extended to the limit position, and the hydraulic mechanism 7 continues to operate, so that the hydraulic oil continues to be supplied from the connecting cavity 61. The piston rods 642 are inserted into the connecting holes 641, so that the outer ends of the piston rods 642 enter the annular groove, and the ends of the adjacent pairs of piston rods 642 are close to each other, the spring 1 643 is compressed and shortened, and the lower ends of the corresponding two pairs of connecting rods 644 are close to each other, and the upper ends lift the bulging blocks 63, and each bulging block 63 moves along the radial direction of the telescopic piston 4, so that the bulging ring 5 bulges outward until the outer peripheral wall of the bulging ring 5 (made of rubber to avoid scratching the inner surface of the inner tube body 200) is pressed against the inner wall of the inner tube body 200, and the hydraulic mechanism 7 stops acting; When it is necessary to release the clamping and fixing of the inner tube body 200, the hydraulic mechanism 7 is activated to make the hydraulic oil in the sliding hole 3 flow to the hydraulic mechanism 7, and each spring 643 releases elastic potential energy to push each piston rod 642 to penetrate into the corresponding connecting hole 641, and the distance between the outer ends of the corresponding pair of piston rods 642 increases. The lower ends of the two pairs of connecting rods 644 corresponding to the pair of piston rods 642 move away from each other, and the upper ends drop, so that each expansion block 63 moves along the radial direction of the telescopic piston 4 toward the telescopic piston 4, so that the outer peripheral wall of the expansion ring 5 is separated from the contact with the inner tube body 200, until each connecting rod 644 abuts against the side wall of the connecting cavity 61, and each piston rod 642 cannot continue to penetrate into the corresponding connecting hole 641, and then the telescopic piston 4 moves in the direction away from the inner tube body 200 and retreats to the inner end of the sliding hole 3. After each telescopic piston 4 has withdrawn from the inner cavity of the inner tube body 200, the hydraulic mechanism 7 stops running.

[0033] Embodiment 3: like Figures 5 to 7 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the hydraulic mechanism 7 further includes a hydraulic shell 71, which is fixed on the outer wall of the vertical plate 12, and the inner cavity is connected to the outer end of the sliding hole 3; a plurality of telescopic blocks 72, which can be slidably inserted on the peripheral wall of the hydraulic shell 71; a swivel 73, which can be rotatably sleeved on the outer peripheral wall of the hydraulic shell 71, and is connected to the transmission block through an arc groove 74 with each telescopic block 72; a plurality of springs 75, which are installed between the hydraulic shell 71 and the outer end of each telescopic block 72 through a pair of vertical plates 76; an adjustable stroke rotation drive unit 77, which is driven by a motor 2 and is used to control the rotation of the swivel 73.

[0034] Furthermore, the adjustable stroke rotation drive unit 77 includes a driven tooth group 771, which is arranged on one side of the surface of the rotating ring 73; a fan-shaped fixed plate 772, one end of which is fixedly connected to the output shaft of the motor 2, and the other end is provided with an active tooth group 1 773; a fan-shaped movable plate 774, one end of which can be rotatably installed on the output shaft of the motor 2, and the overlapping area with the fan-shaped fixed plate 772 is adjusted by the adjusting member 8, and the other end is provided with an active tooth group 2 775; wherein, the active tooth group 1 773 and the active tooth group 2 775 are both meshed with the driven tooth group 771 for transmission.

[0035] Preferably, each arc groove 74 has one end close to the hydraulic housing 71 and the other end far away from the hydraulic housing 71 .

[0036] Furthermore, the adjusting member 8 includes an arc groove 81, which is arranged on the fan-shaped movable plate 774 and is concentric with the output shaft of the motor 2; a plurality of circular grooves 82, which are arranged at intervals on the fan-shaped movable plate 774 and distributed along the arc groove 81; a locking nut 83, whose bolt portion can pass through the arc groove 81 and be threadedly connected to the fan-shaped fixed plate 772 through a threaded hole, and whose nut portion can engage with one of the circular grooves 82 to fix the fan-shaped movable plate 774.

[0037] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the telescopic piston 4 needs to extend out of the sliding hole 3, the motor 2 drives the fixed sector plate and the sector movable plate 774 to rotate, and the active tooth group 1 773 and the active tooth group 2 775 are engaged with the driven tooth group 771 on the rotating ring 73, driving the rotating ring 73 to rotate, and each arc groove 1 74 rotates with the rotating ring 73, so that each transmission block slides in the direction of the corresponding arc groove 1 74 close to the hydraulic housing 71, driving each telescopic block 72 to extend into the hydraulic housing 71 The hydraulic oil in the hydraulic housing 71 is pressed into the sliding hole 3, causing the telescopic piston 4 to extend out of the sliding hole 3, and then the expansion mechanism 6 is actuated to expand the outer ring of the expansion ring 5, thereby fixing the inner tube body 200. During this process, each vertical plate 76 on each telescopic block 72 approaches the corresponding vertical plate 76 on the outer wall of the hydraulic housing 71, each spring 2 75 is compressed and shortened, the motor 2 stops rotating, and the active tooth group 1 773 and the active tooth group 2 775 are about to separate from the driven tooth group 771; When it is necessary to separate the telescopic piston 4 from the inner cavity of the inner tube body 200, the motor 2 continues to rotate, so that the active tooth group 1 773 and the active tooth group 2 775 are separated from the driven tooth group 771, and the motor 2 stops running. At this time, each spring 2 75 releases elastic potential energy, and pushes each telescopic block 72 to the outside of the hydraulic housing 71 through the corresponding vertical plate 76, and the rotating ring 73 reverses, and part of the hydraulic oil in the sliding hole 3 returns to the hydraulic housing 71, and the expansion mechanism 6 is reset, and the outer peripheral wall of the expansion ring 5 is separated from the contact with the inner tube body 200, and then the telescopic piston 4 is separated from the inner tube body 200; When it is necessary to adjust the expansion degree of the expansion mechanism 6, when the active tooth group 1 773 and the active tooth group 2 775 are not engaged with the driven tooth group 771, loosen the locking nut 83 to disengage the nut portion of the locking nut 83 from the corresponding circular groove 82, and then rotate the fan-shaped movable plate 774 to adjust the overlapping range of the fan-shaped movable plate 774 and the fixed fan-shaped plate, so that the overlapping range of the active tooth group 1 773 and the active tooth group 2 775 changes. When the active tooth group 1 773 completely overlaps with the driven tooth group 771, the transmission stroke with the driven tooth group 771 is the smallest, the rotation amplitude of the swivel 73 is the smallest, the sliding distance of each transmission block in the corresponding arc groove 1 74 is the shortest, and accordingly, the stroke that each telescopic block 72 can extend into the inner cavity of the hydraulic shell 71 is also the smallest, and the hydraulic oil squeezed out of the hydraulic shell 71 is also the least (but At least it can ensure that the telescopic piston 4 will be pushed out to the limit position and fixed, and the expansion degree of the expansion mechanism 6 is minimal. On the contrary, the smaller the overlap range of the active tooth group 1 773 and the active tooth group 2 775, the longer the stroke that the active tooth group 1 773 and the active tooth group 2 775 can engage with the driven tooth group 771, the greater the rotation amplitude of the swivel 73, the longest sliding distance of each transmission block in the corresponding arc groove 1 74, and accordingly, the greater the stroke that each telescopic block 72 can extend into the inner cavity of the hydraulic shell 71, the more hydraulic oil is squeezed out of the hydraulic shell 71, and the greater the expansion degree of the expansion mechanism 6. After the adjustment is completed, tighten the locking nut 83 to make the nut part enter the corresponding circular groove 82 at this time, so that the fan-shaped fixed plate 772 and the fan-shaped movable plate 774 cannot move relative to each other, and the adjustment is completed.

[0038] Embodiment 4: like Figure 3 , Figure 8 and Fig. 9 As shown, in the present embodiment, in addition to the structural features of the aforementioned embodiments, the telescopic piston 4 includes a piston body 41, which can be slidably installed in the sliding hole 3, and a movable ring protrusion 42 is fixedly provided on the outer peripheral wall; a ring groove 43 is provided on the peripheral wall of the piston body 41, and is used to insert one end of the expansion ring 5; a screw hole 44 is provided at the outer end of the piston body 41; a buckle cap 45 is fixed to the outer end of the piston body 41 through a thread and the screw hole 44 through a thread, and is used to fix the other end of the expansion ring 5, and a fixed ring protrusion is provided at the inner end of the sliding hole 3.

[0039] Furthermore, the buckle cap 45 includes a connecting column 451, which has an inner cavity, and a pressure edge 452 is fixed at one end of the outer peripheral wall; a pair of through holes 453 are arranged on the outer wall of the pressure edge 452 and connected to the inner cavity; a pair of side grooves 454 are arranged on the side walls of the connecting column 451 and connected to the inner cavity; a pair of bottom grooves 455 are arranged on the end of the connecting column 451 away from the pressure edge 452; a pair of L-shaped sliders 456 can be slidably installed in the inner cavity, each through hole 453, each side groove 454 and each bottom groove 455, and a spring 457 is arranged between them, and the outer side wall of each L-shaped slider 456 is provided with an external thread for matching the screw hole 44.

[0040] Furthermore, it also includes a floating hole 91, which is arranged at the inner end of the screw hole 44, in which a floating block 92 is floatingly installed through a spring 4; a plurality of trapezoidal blocks 93 are fixedly arranged at the outer end of the floating block 92 at intervals along the circumferential direction, and one side wall is inclined; a plurality of trapezoidal grooves 94 are arranged on the end faces of each L-shaped sliding block 456 extending out of each bottom groove 455, and the side walls adjacent to each trapezoidal block 93 are inclined.

[0041] In this embodiment of the present application, due to the adoption of the above-mentioned structure, the expansion ring 5 is made of rubber material, which is prone to wear or loss of elasticity after long-term use and needs to be replaced. At this time, pressure is applied to one end of a pair of L-shaped sliders 456 extending out of each through hole 453, so that the pair of L-shaped sliders 456 are close to each other, each trapezoidal groove 94 is disengaged from the corresponding trapezoidal block 93, the spring three 457 is compressed and shortened, and the external thread on the side wall of each L-shaped slider 456 is separated from the screw hole 44, and the threaded connection state is released. The staff can directly move the buckle cap 45 away from the piston body 41, and then pull the expansion ring 5 off the piston body 41, put a new expansion ring 5 on the outer peripheral wall of the piston body 41, and insert one end of it into the ring groove two 43, then release the pair of L-shaped sliders 456, grab the pressure edge 452, align the connecting column 451 with the screw hole 44, and then After that, the buckle cap 45 is rotated, and the external threads on the outer side walls of a pair of L-shaped sliders 456 cooperate with the threads of the screw hole 44, so that the connecting column 451 rotates and penetrates into the screw hole 44, and the middle pressure edge 452 gradually coincides with the outer peripheral wall of the other end of the expansion ring 5. In this process, the inclined side walls of each trapezoidal groove 94 cooperate with the inclined side walls of the corresponding trapezoidal blocks 93, so that the floating block 92 (whose cross-section and the cross-section of the floating hole 91 are both elliptical, and the floating block 92 cannot rotate in the floating hole 91) floats repeatedly relative to the connecting column 451 until the inner end wall of the pressure edge 452 is tightly pressed against the outer end surface of the piston body 41, and the side walls on the other side of each trapezoidal block 93 are upright, and the side walls on the other side of each trapezoidal block 93 are also upright, so that the connecting column 451 cannot rotate in the opposite direction, and the connecting column 451 can only be disengaged from the screw hole 44 by pressing the L-shaped slider 456.

[0042] When the outer end of the piston body 41 extends to the limit position, the movable annular protrusion 42 abuts against the fixed annular protrusion, and the piston body 41 will not be separated from the sliding hole 3, and the hydraulic oil continuously supplied to the connecting chamber 61 can also enter the connecting hole 641.

[0043] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0044] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A high-strength automobile and motorcycle shock absorber inner tube, comprising an inner tube body (200) with an oil hole (100), characterized in that: The inner tube body (200) is made of 34MnB5 steel, and the material composition of the 34MnB5 steel is: 0.35%-0.34% carbon, 0.27% silicon, 1.38%-1.33% manganese, 0.009%-0.01% phosphorus, 0.002%-0.001% sulfur, 0.0023%-0.0021% boron, 0.17% chromium, 0.03%-0.024% aluminum, 0.05%-0.037% titanium, 0.02% copper, and the remaining weight percentage of iron.

2. The high-strength automobile and friction shock absorber inner tube according to claim 1, characterized in that: The inner tube body (200) is made of 34MnB5 steel, the material composition of which is: 0.35% carbon, 0.27% silicon, 1.38% manganese, 0.009% phosphorus, 0.002% sulfur, 0.0023% boron, 0.17% chromium, 0.03% aluminum, 0.05% titanium, 0.02% copper and the remaining weight percentage of iron.

3. The high-strength automobile and motorcycle shock absorber inner tube according to claim 1, characterized in that: The inner tube body (200) is made of 34MnB5 steel, the material composition of which is: 0.34% carbon, 0.27% silicon, 1.33% manganese, 0.01% phosphorus, 0.001% sulfur, 0.0021% boron, 0.17% chromium, 0.024% aluminum, 0.037% titanium, 0.02% copper and the remaining weight percentage of iron.

4. A fixture for processing the inner tube of a high-strength automobile and motorcycle shock absorber according to any one of claims 1 to 3, comprising a frame (1) consisting of a bottom plate (11) and two vertical plates (12), characterized in that: Also includes: A pair of inner clamping devices are respectively mounted on the inner side of each of the vertical plates (12) and are used to clamp and fix the inner cavity of the inner tube body (200), and are driven to move synchronously by the motor (2).

5. A high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 4, characterized in that: The inner clamping device comprises: A sliding hole (3) which passes through the vertical plate (12) and has a telescopic piston (4) slidably mounted therein; An expansion ring (5) which is detachably mounted on one end of the telescopic piston (4); A bulging mechanism (6) used to control the bulging ring (5) to bulge outwards; A hydraulic mechanism (7) is used to control the telescopic piston (4) to slide in the sliding hole (3) and simultaneously control the action of the expansion mechanism (6).

6. A high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 5, characterized in that: The expansion mechanism (6) comprises: A connecting cavity (61) arranged on an end surface of the telescopic piston (4) away from the expansion ring (5); A first ring groove (62) is arranged at the outer end of the outer peripheral wall of the telescopic piston (4); A plurality of expansion blocks (63) are movably mounted on the outside of the telescopic piston (4) and are controlled by a plurality of hydraulic transmission mechanisms (64) to move in the radial direction of the telescopic piston (4); Wherein, each of the hydraulic transmission mechanisms (64) is in communication with the connecting chamber (61), and its action is controlled by the hydraulic mechanism (7).

7. A high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 6, characterized in that: The hydraulic transmission mechanism (64) comprises: A pair of connecting holes (641), one end of which is symmetrically arranged on the opposite side walls of the annular groove (62), and the other end of which is connected to the connecting cavity (61); A pair of piston rods (642) are slidably mounted in the connecting holes (641) respectively, with adjacent ends extending into the annular groove (62) and a spring (643) disposed therebetween; Two pairs of connecting rods (644) are arranged in an "eight" shape and are used to drive the expansion block (63) to a pair of piston rods (642).

8. The high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 5, characterized in that: The hydraulic mechanism (7) comprises: A hydraulic housing (71) is fixedly mounted on the outer wall of the vertical plate (12), and its inner cavity is connected to the outer end of the sliding hole (3); A plurality of telescopic blocks (72) slidably inserted on the peripheral wall of the hydraulic housing (71); A swivel ring (73) rotatably sleeved on the outer peripheral wall of the hydraulic housing (71) and connected to each of the telescopic blocks (72) through an arc groove (74) and a transmission block; A plurality of springs (75) are installed between the hydraulic housing (71) and the outer ends of each telescopic block (72) via a pair of vertical plates (76); The adjustable stroke rotation drive unit (77) is driven by the motor (2) and is used to control the rotation of the rotating ring (73).

9. A high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 8, characterized in that: The adjustable stroke rotation drive unit (77) comprises: A driven tooth group (771) disposed on one side of the surface of the rotating ring (73); A fan-shaped fixing plate (772), one end of which is fixedly connected to the output shaft of the motor (2), and the other end of which is provided with a driving tooth set (773); A fan-shaped movable plate (774), one end of which is rotatably mounted on the output shaft of the motor (2), and the overlapping area with the fan-shaped fixed plate (772) is adjusted by an adjusting member (8), and the other end of which is provided with a second active tooth set (775); Wherein, the active tooth group one (773) and the active tooth group two (775) are both meshed with the driven tooth group (771) for transmission.

10. A high-strength automobile and motorcycle shock absorber inner tube processing fixture according to claim 9, characterized in that: The adjusting member (8) comprises: A second arc groove (81) is arranged on the fan-shaped movable plate (774) and is concentric with the output shaft of the motor (2); A plurality of circular grooves (82) are arranged at intervals on the fan-shaped movable plate (774) and distributed along the arc groove 2 (81); The locking nut (83) has a bolt portion that can pass through the second arc groove (81) and be threadedly connected to the fan-shaped fixed plate (772) through a threaded hole, and a nut portion that can be engaged with one of the circular grooves (82) to fix the fan-shaped movable plate (774).

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