Segmented serial spring shock absorber and processing equipment

Abstract

The invention discloses a segmented series spring shock absorber and machining equipment, and belongs to the technical field of vehicle shock absorption. The shock absorber comprises a gas spring, a heavy-load spring, a light-load spring and a retainer, wherein the retainer is arranged between the light-load spring and the heavy-load spring; a load energy release device and a temperature adaptation assembly are further arranged on the retainer, and the load energy release device comprises a bearing disc, an annular storage cavity and an energy release pad and is used for absorbing beat vibration energy; the temperature adaptation assembly comprises a ventilation hole and a friction pad, heat generated by the friction pad can be transmitted to the energy release pad, and low-temperature compensation and high-temperature heat dissipation are achieved. The invention further provides milling equipment for machining the clamping-in groove and the wedge-shaped groove, precise machining of the wedge-shaped groove is achieved through the eccentric milling principle, and the pressure relieving assembly ensures that a cutter stably stretches out through buffering of non-Newtonian fluid. The problems of response accuracy, retainer stability, beating vibration durability and temperature adaptability of the shock absorber under different load working conditions are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spring shock absorber, more particularly, to a segmented series spring shock absorber and processing equipment. BACKGROUND

[0002] The spring shock absorber is the core component of the vehicle suspension system, and its performance directly affects the ride comfort and driving stability of the vehicle. With the diversification of vehicle load conditions, the traditional single spring shock absorber is difficult to balance in different conditions such as empty load and full load, resulting in the problem of hard damping under light load and insufficient damping under heavy load.

[0003] Chinese patent CN107218327A discloses a double-spring shock absorber assembly, which adopts a series spring structure to realize graded damping response. Chinese patent CN107429772B discloses a combination of a damping air spring and a shock absorber for a vehicle axle / suspension system, which relates to the combined application of springs and shock absorbers in vehicle suspension systems. Although the existing technology has proposed a damping scheme of series spring structure, there are still the following deficiencies in actual application: First, the connecting components between the series springs are not stable enough. The existing retainer structure is mostly connected by a simple sleeve, which is easy to deviate radially or dislocate axially under continuous vibration impact, resulting in interference between the two-stage springs, abnormal noise and accelerated component wear.

[0004] Second, the periodic vibration caused by wheel-rail contact or road excitation causes beat vibration, and the alternating load causes continuous impact on the internal structure of the shock absorber. The existing shock absorber lacks an effective beat vibration energy release mechanism and is prone to fatigue damage after long-term work.

[0005] Third, the working performance of the shock absorber is significantly affected by the environmental temperature. In low temperature environment, the elastic element response is sluggish, and the damping effect is reduced; after long-term continuous work, the temperature rises, and the elastic element appears heat recession phenomenon. The existing shock absorber generally lacks a temperature self-adaptive adjustment mechanism.

[0006] Fourth, in order to improve the connection stability of the retainer, some designs open a wedge-shaped groove on the sleeve hole wall to cooperate with a wedge-shaped block locking structure. However, the wedge-shaped groove requires high machining precision, and the traditional milling process is difficult to accurately machine on the arc wall surface of the sleeve inner hole, and the tool is easy to be damaged by impact during the machining process. SUMMARY

[0007] The present application aims to solve the technical problems of the existing technology, such as inaccurate response of the shock absorber when switching between light load and heavy load conditions, insufficient stability of the retainer structure leading to spring dislocation, poor durability under alternating load impact, and performance degradation in extreme temperature environment, and provides a segmented series spring shock absorber and processing equipment.

[0008] To achieve the above object, the present application adopts the following technical scheme: A segmented series spring shock absorber, comprising: a gas spring, the outer wall of both ends of the gas spring is respectively provided with a first bearing plate and a second bearing plate; a heavy load spring is arranged on one side of the first bearing plate; a light load spring is arranged on one side of the second bearing plate; a retainer is arranged between the light load spring and the heavy load spring; the retainer comprises an outer sleeve and an inner sleeve nested with each other, a plurality of clamping grooves are formed in the outer wall of the outer sleeve, and the inner sleeve is provided with a plurality of elastic protrusions capable of being clamped into the clamping grooves.

[0009] As a preferred, the hole wall arc part of the outer sleeve is provided with a wedge-shaped groove, and the outer wall of the elastic protrusion is fixedly connected with a wedge-shaped block matched with the wedge-shaped groove, and the wedge-shaped block enters the inside of the clamping groove by swinging with the elastic protrusion.

[0010] As a preferred, the inner wall of the inner sleeve is provided with a limiting ring for supporting a plurality of elastic protrusions, and the outer wall of the limiting ring is fixedly connected with a plurality of retaining frames for limiting the circumferential movement of the elastic protrusions.

[0011] As a preferred, the retainer is further provided with: a load energy release device, comprising a bearing disc and an annular receiving cavity formed in the inside of the bearing disc; an energy release protection mechanism, comprising a partition disc arranged in the annular receiving cavity and an energy release pad arranged on the partition disc, the energy release pad is used for absorbing vibration energy; a temperature adaptation assembly, comprising an air exchange hole for air exchange and heat dissipation of the annular receiving cavity, and a friction pad for generating heat, the heat generated by the friction pad can be transmitted to the energy release pad.

[0012] As a preferred, the temperature adaptation assembly further comprises: a heat conduction column arranged in the inside of the annular receiving cavity; a sliding block movably mounted in the inside of the movable cavity of the annular receiving cavity, the outer wall of the sliding block and the outer wall of the heat conduction column are both provided with the friction pad; a temperature change plate arranged between the inner wall of the movable cavity and the sliding block, the temperature change plate can be deformed with temperature change to adjust the contact state between the two friction pads; an arc-shaped heat transfer plate arranged at the end of the heat conduction column and in contact with the energy release pad, for transmitting the heat generated by friction to the energy release pad.

[0013] The application further provides a milling device for processing the snap-in groove and the wedge-shaped groove of the segmented serial spring shock absorber, comprising: a milling machine body; a milling tool, comprising a tool shank, a main milling tooth arranged at the end of the tool shank, and a milling assembly arranged on the outer wall of the tool shank; the milling assembly comprises a side milling tooth capable of radially expanding and contracting; a pressure transmission mechanism for converting the axial feeding movement of the tool shank into the radial expansion movement of the side milling tooth; a pressure relief assembly, comprising an annular liquid storage cavity for storing non-Newtonian fluid and an annular partition plate having elastic deformation capacity, for buffering the pressure impact when the side milling tooth expands; wherein the tool shank has an eccentricity between the tool shank axis and the center of the inner arc surface of the snap-in groove when the tool shank processes the wedge-shaped groove.

[0014] Preferably, the pressure transmission mechanism comprises: an annular liquid storage groove arranged in the interior of the tool shank for storing hydraulic fluid; an annular piston arranged in the annular liquid storage groove; a fixed cover fixedly connected to the outer wall of the tool shank, wherein the fixed cover is rotatably mounted with an annular positioning seat; an annular cover slidably mounted in the annular positioning seat for contacting the outer wall of the outer sleeve; a drive rod rotatably mounted in the fixed cover, wherein one end of the drive rod is rotatably mounted with a roller in contact with the top end of the annular cover, and the other end is rotatably connected with the annular piston, and the outer wall of the drive rod is provided with a reset spring for pulling the annular piston back to its original position.

[0015] Preferably, the pressure relief assembly further comprises: an annular gas storage cavity arranged in the inner wall of the annular liquid storage groove; a communication hole arranged in the inner wall of the annular liquid storage cavity for communicating the annular liquid storage cavity and the annular gas storage cavity; a hydraulic buffer cavity arranged outside the annular partition plate for providing the annular partition plate with elastic deformation capacity; a plurality of annular support discs arranged in the annular liquid storage cavity, wherein the inner circle of the annular support disc is fixedly connected with the outer wall of the annular partition plate, and the outer circle is fixedly connected with the inner wall of the annular liquid storage cavity, and a plurality of deformation grooves are arranged in the interior of the annular support disc for deformation.

[0016] Preferably, the milling assembly comprises a fixed seat fixedly connected to the outer wall of the tool shank, wherein the fixed seat is internally provided with a communication cavity, the communication cavity is movably mounted with a piston rod, and the side milling tooth is fixedly connected to the two sides of the end of the piston rod; the side milling tooth comprises a mounting portion for mounting and positioning, a first milling edge for milling the inclined wedge surface of the wedge-shaped groove, and a second milling edge for milling the reference surface.

[0017] Preferably, the milling device further comprises a three-jaw chuck fixedly connected to the machining table of the milling machine body, wherein the three-jaw chuck is fixedly connected with a centering support column arranged to extend into the interior of the outer sleeve and abut against the inner wall thereof, and the outer wall of the centering support column is provided with a chip removal groove.

[0018] The application has the following beneficial effects: By the sectional structure of the gas spring in series with the light load spring and the heavy load spring, the grading response of light load and heavy load conditions is realized, and the adaptability of the damping system to different loads is improved. The retainer adopts the nested structure of inner and outer sleeves, and cooperates with the locking of the elastic block and the clamping groove, effectively reduces the radial deviation, ensures that the two-stage spring does not dislocate or collide when stressed, and protects the overall stability of the damping system. Through the energy release pad in the load energy release device, the vibration energy is absorbed, the impact amplitude of alternating load is weakened, and the durability problem of the shock absorber under periodic excitation is solved. The temperature adaptation assembly compensates for the slow response of the energy release pad in the low temperature environment through the heat generation of the friction pad, and realizes heat dissipation through the air hole to prevent thermal decay, so as to ensure the response performance of the shock absorber in the extreme temperature environment. The special milling equipment realizes the precise machining of the wedge-shaped groove through the eccentric milling principle and the hydraulic drive side milling tooth telescopic mechanism; the pressure relief assembly utilizes the non-Newtonian fluid buffer and the elastic deformation of the annular partition plate to ensure the smooth extension of the tool and avoid impact damage, thereby protecting the machining precision and tool life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the shock absorber structure main body of the present application; Figure 2 It is a schematic diagram of the retainer structure main body of the present application; Figure 3 It is a schematic diagram of the retainer structure section of the present application; Figure 4 It is a schematic diagram of the Figure 3 enlarged schematic diagram of the A structure of the present application; Figure 5 It is a local enlarged schematic diagram of the bearing disc structure of the present application; Figure 6 It is a local sectional view schematic diagram of the bearing disc structure of the present application; Figure 7 It is a local sectional view schematic diagram of the outer sleeve structure of the present application; Figure 8 It is a schematic diagram of the Figure 7 enlarged schematic diagram of the B structure of the present application; Figure 9 It is a sectional view schematic diagram of the inner sleeve structure of the present application; Figure 10 It is an enlarged schematic diagram of the outer sleeve structure of the present application; Figure 11 It is a schematic diagram of the Figure 10 enlarged schematic diagram of the C structure of the present application; Figure 12 It is a schematic diagram of the milling machine body structure main body of the present application; Figure 13Splitting schematic view of the milling tool structure of the present application; Figure 14 Splitting schematic view of the three-jaw chuck structure of the present application; Figure 15 Schematic view of one use state of the milling tool structure of the present application; Figure 16 Local enlarged schematic view of the tool shank structure of the present application; Figure 17 Local sectional view schematic view of the fixed cover structure of the present application; Figure 18 Local sectional view schematic view of the tool shank structure of the present application; Figure 19 Sectional view schematic view of the fixed seat structure of the present application; Figure 20 Splitting schematic view of the piston rod structure of the present application; Figure 21 Enlarged schematic view of the side milling cutter structure of the present application; Figure 22 Schematic view of the fixed cover structure of the present application from below; Figure 23 Local sectional view schematic view of the tool shank structure of the present application; Figure 24 Schematic view of the Figure 23 Enlarged schematic view of the D structure of the present application.

[0020] Label explanation in the figure: 1, gas spring; 11, light load spring; 12, heavy load spring; 13, first bearing plate; 14, adjusting end cover; 15, knuckle bearing; 16, second bearing plate; 2, retainer; 21, outer sleeve; 22, inner sleeve; 23, clamping groove; 24, elastic lug; 25, limiting boss; 26, limiting ring; 27, retainer; 28, wedge-shaped groove; 3, load release device; 31, bearing disc; 32, annular receiving cavity; 33, movable hole; 34, support ring; 35, heat preservation cover; 4, release protection mechanism; 41, fixed column; 42, partition disc; 43, release pad; 44, deformation cavity; 45, retaining ring; 5, temperature adaptation assembly; 51, air exchange hole; 52, rubber diaphragm; 53, heat conducting column; 54, arc-shaped heat transfer plate; 55, friction pad; 56, movable cavity; 57, sliding block; 58, temperature change plate; 59, ejection rod; 6, milling machine body; 61, three-jaw chuck; 62, centering support column; 7, milling cutter; 71, tool shank; 72, main milling tooth; 73, counterweight; 8, milling assembly; 81, fixed seat; 82, communication cavity; 83, piston rod; 84, side milling tooth; 85, mounting portion; 86, first milling edge; 87, second milling edge; 9, pressure transmission mechanism; 91, annular liquid storage groove; 92, annular piston; 93, fixed cover; 94, annular positioning seat; 95, annular cover; 96, driving rod; 97, roller; 98, return spring; 10, pressure relief assembly; 101, annular liquid storage cavity; 102, annular gas storage cavity; 103, communication hole; 104, annular partition plate; 105, hydraulic buffer cavity; 106, annular support disc; 107, deformation groove. DETAILED DESCRIPTION EMBODIMENT

[0021] The embodiment discloses a segmented series spring shock absorber. By connecting the gas spring, the light load spring and the heavy load spring in series, the graded response of light load and heavy load working conditions is realized; the retainer adopts the nested structure of the inner and outer sleeves, and the locking cooperation of the elastic lug and the clamping groove is matched to ensure that the two-stage springs do not dislocate or collide when being stressed, and the overall stability of the damping system is ensured.

[0022] As Figures 1 to 3As shown, the spring shock absorber includes a gas spring 1 and a first load bearing plate 13 and a second load bearing plate 16 arranged at the top and bottom outer walls of the gas spring 1 respectively, the bottom end of the first load bearing plate 13 is provided with a heavy load spring 12 for heavy load intervention damping, the top end of the second load bearing plate 16 is provided with a light load spring 11 for light load damping, the opposite ends of the light load spring 11 and the heavy load spring 12 are provided with a retainer 2 for separating the position, the retainer 2 includes an outer sleeve 21 and an inner sleeve 22, the inner sleeve 22 is inside the outer sleeve 21, the outer wall of the outer sleeve 21 is provided with a plurality of clamping grooves 23, the inner sleeve 22 is provided with a plurality of elastic lugs 24 inside for limiting the relative position of the outer sleeve 21 and the inner sleeve 22, the elastic lugs 24 are inside the clamping grooves 23, and the inner wall of the outer sleeve 21 is provided with a limiting boss 25 at the bottom end for limiting the movement stroke of the inner sleeve 22. The nested structure of the outer sleeve 21 and the inner sleeve 22 can reduce the radial deviation, the cooperation of the elastic lugs 24 and the clamping grooves 23 can enhance the overall stability of the retainer 2, avoid dislocation impact of the light load spring 11 and the heavy load spring 12 under stress, and the limiting boss 25 can accurately control the movement range of the inner sleeve 22 to prevent excessive displacement from causing structural damage.

[0023] Specifically, as shown in the figure, Figures 1 to 2 The hole wall of the outer sleeve 21 is provided with a wedge-shaped groove 28, and the outer wall of the elastic lug 24 is fixedly connected with a wedge-shaped block matched with the wedge-shaped groove 28, the wedge-shaped block enters the inside of the clamping groove 23 by swinging with the elastic lug 24, and the wedge-shaped groove 28 and the wedge-shaped block can increase the clamping stability of the elastic lug 24 inside the clamping groove 23, the top end and the bottom end of the gas spring 1 are fixedly connected with joint bearings 15 for connecting with external equipment, the bottom end of the second load bearing plate 16 is provided with an adjusting end cover 14 for adjusting the initial compression amount of the light load spring 11, and the outer wall of the gas spring 1 on both sides is fixedly connected with a top-holding block for holding the adjusting end cover 14. The joint bearing 15 can realize multi-angle adaptive connection, the adjusting end cover 14 can flexibly adapt to different light load working condition requirements, the top-holding block can guarantee the installation stability of the adjusting end cover 14, and avoid loosening and deviation in the damping process. Embodiment

[0024] Based on the embodiment 1, a load energy release and temperature self-adaptive system is added to the retainer. The energy release pad absorbs the vibration energy, the friction pad generates heat to compensate for the low temperature delay, and the air exchange hole realizes heat dissipation at high temperature, solving the durability problem of the shock absorber under alternating load impact and the response performance problem in extreme temperature environment.

[0025] As shown in the figure, Figures 3 to 7As shown, the load energy-releasing structure comprises a load energy-releasing device 3, the load energy-releasing device 3 comprises a bearing disc 31 and an annular receiving cavity 32 opened inside the bearing disc 31, a plurality of movable holes 33 are opened at the inner wall bottom end of the annular receiving cavity 32, the energy-releasing protection mechanism 4 comprises a plurality of fixed columns 41 inside the movable holes 33 and a partition disc 42 fixedly connected at the top end of the fixed columns 41, the outer wall of the top end and the bottom end of the partition disc 42 is fixedly connected with an energy-releasing pad 43 for weakening the beat amplitude, the energy-releasing pad 43 is inside the annular receiving cavity 32, the temperature adaptation assembly 5 comprises a plurality of air exchange holes 51 for air exchange inside the annular receiving cavity 32, a plurality of heat conduction columns 53 fixedly connected inside the fixed columns 41 for heat conduction and two sliding blocks 57 movably installed inside the movable holes 33, the outer wall of the sliding blocks 57 and the outer wall of the heat conduction columns 53 are fixedly connected with a friction pad 55 for generating heat by friction, the relative movement between the heat conduction columns 53 and the sliding blocks 57 will cause the two friction pads 55 to rub against each other, and the generated temperature compensates for the reaction sluggishness of the energy-releasing pad 43 in the initial low-temperature state. The air exchange holes 51 realize air exchange between the annular receiving cavity 32 and the outside during the long-term use process, realize heat exchange of the energy-releasing pad 43, avoid heat decay of the energy-releasing pad 43 caused by long-time high temperature, the bearing disc 31 provides a stable installation basis for each assembly, the annular receiving cavity 32 can accommodate the energy-releasing pad 43 and limit the deformation range thereof, the movable holes 33 ensure the flexible movement of the fixed columns 41, the fixed columns 41 and the partition disc 42 can uniformly transmit the vibration force, the energy-releasing pad 43 can directly weaken the beat amplitude, reduce the impact of the alternating load on the retainer 2, thereby reducing the wear caused by the relative movement or impact between the outer sleeve 21 and the inner sleeve 22, the heat conduction columns 53 efficiently transmit the heat generated by friction, the heat generated by the cooperation of the sliding blocks 57 and the friction pads 55 can optimize the initial low-temperature working performance of the energy-releasing pad 43, the air exchange holes 51 realize internal and external air exchange and heat dissipation, and avoid the influence of heat decay on the energy-releasing effect. Specifically, when the temperature of the energy-releasing pad 43 is lower than a first preset threshold value (such as 0°C), the friction pads 55 are in a contact state and continuously generate heat by friction; when the temperature of the energy-releasing pad 43 is higher than a second preset threshold value (such as 60°C), the air exchange holes 51 are opened to realize heat dissipation; a temperature buffer interval is provided between the first preset threshold value and the second preset threshold value, and in this interval, neither the heat generation mechanism nor the air exchange and heat dissipation mechanism actively intervenes, and the working temperature is maintained stable by relying on the heat capacity of the energy-releasing pad 43 itself.

[0026] Further, as Figure 9As shown, the inner wall of the inner sleeve 22 is provided with a limiting ring 26 for supporting a plurality of elastic lugs 24, and the outer wall of the limiting ring 26 is fixedly connected with a plurality of retaining frames 27 for limiting the circumferential movement of the elastic lugs 24. The inner wall of the inner sleeve 22 and the inner wall of the elastic lugs 24 are both provided with assembly grooves for mounting the limiting ring 26 and the retaining frame 27, and the limiting ring 26 and the retaining frame 27 are embedded in the assembly grooves. The limiting ring 26 enhances the installation stability of the elastic lugs 24, avoids the elastic lugs 24 from following the vibration under stress, and the retaining frame 27 limits the circumferential displacement of the elastic lugs 24, ensuring that the elastic lugs 24 are always accurately clamped into the clamping grooves 23. The assembly grooves realize the concealed installation of the limiting ring 26 and the retaining frame 27, without affecting the cooperation accuracy of the inner sleeve 22 and the gas spring 1.

[0027] Further, as shown in Figure 5 The top end and the bottom end of the inner wall of the movable hole 33 are both fixedly connected with a support ring 34 for limiting the movement trajectory of the fixed column 41. The support ring 34 cooperates with the fixed column 41 to limit the axial movement trajectory between the bearing disc 31 and the outer sleeve 21, avoiding the circumferential rotation of the bearing disc 31 relative to the outer sleeve 21 from causing damage to the light load spring 11 or the heavy load spring 12. The bottom end of the outer wall of the bearing disc 31 is fixedly connected with a heat preservation cover 35 for heat preservation between the bearing disc 31 and the outer sleeve 21, and the heat preservation cover 35 heat preserves the friction pad 55 and the sliding block 57. The support ring 34 accurately limits the movement trajectory of the fixed column 41, preventing the circumferential rotation of the bearing disc 31 from damaging the light load spring 11 and the heavy load spring 12. The heat preservation cover 35 reduces the influence of external temperature on the friction pad 55 and the sliding block 57, ensures the stable efficiency of friction heat generation, prolongs the service life of the temperature adaptation assembly 5, and prevents the influence of external airflow on the friction temperature of the friction pad 55.

[0028] Further, as shown in Figures 7 to 8 The separation disc 42 is inside the annular receiving cavity 32, and the inner arc surface and the outer arc surface of the separation disc 42 are both fixedly connected with a retaining ring 45, which is in contact with the outer wall of the fixed column 41. The retaining ring 45 is used to fill the gap between the inner arc surface and the outer arc surface of the separation disc 42 and the inner arc surface and the outer arc surface of the inner wall of the annular receiving cavity 32. The retaining ring 45 ensures the stable and smooth movement path of the separation disc 42 inside the annular receiving cavity 32, avoids the jamming or deviation of the separation disc 42 during movement, ensures the uniform stress of the energy release pad 43, and improves the vibration damping effect.

[0029] It is worth noting that, as shown in Figures 7 to 8As shown, the top end of the heat-conducting column 53 is fixedly connected with an arc-shaped heat-conduction plate 54, the arc-shaped heat-conduction plate 54 and the top end and bottom end of the partition disc 42 are at the same horizontal plane, the arc-shaped heat-conduction plate 54 is in contact with the energy-releasing pad 43, the arc-shaped heat-conduction plate 54 is used for heat conduction between the heat-conducting column 53 and the energy-releasing pad 43, and the temperature generated by the mutual friction of the friction pads 55 is transmitted to the energy-releasing pad 43. According to the vibration force of the bearing disc 31, the vibration force is converted into the storage gas heating of the energy-releasing pad 43, the arc-shaped heat-conduction plate 54 increases the contact area of the heat-conducting column 53 and the energy-releasing pad 43, improves the heat conduction efficiency, quickly compensates for the low-temperature reaction delay problem of the energy-releasing pad 43, and ensures that the energy-releasing pad 43 can play a damping role efficiently under different temperature environments.

[0030] It is worth introducing that, as shown in Figures 5 to 6 As shown, the inner walls of the movable holes 33 are provided with movable cavities 56 on both sides, sliding blocks 57 are slidingly installed in the movable cavities 56, temperature-changing plates 58 for temperature change are fixedly connected to the inner walls of the movable cavities 56 on both sides, the other ends of the temperature-changing plates 58 are fixedly connected to the outer walls of the sliding blocks 57, and the temperature-changing plates 58 are deformed and stretched out along with the friction temperature of the friction pads 55. The positions of the sliding blocks 57 are adjusted to control the two friction pads 55 to be out of contact, so as to avoid long-time continuous friction of the friction pads 55. The movable cavities 56 provide stable sliding space for the sliding blocks 57, the temperature-changing plates 58 can automatically adjust the positions of the sliding blocks 57 according to the temperature, the automatic start and stop of the friction pads 55 are realized, excessive friction is avoided to cause wear, and the service life of the friction pads 55 is prolonged.

[0031] It is worth noting that, as shown in Figures 3 to 5 As shown, the gas exchange holes 51 are designed in a conical structure, the annular receiving cavity 32 is connected with the outside through the gas exchange holes 51, the annular receiving cavity 32 forms a gas exchange channel through the gas exchange holes 51, the inner wall diameter of the gas exchange holes 51 towards the annular receiving cavity 32 is smaller than the inner wall diameter of the gas exchange holes 51 towards the outside, rubber diaphragms 52 for plugging the gas exchange channel are fixedly connected to one side of the inner wall of the gas exchange holes 51 towards the annular receiving cavity 32, a plurality of ventilation slits are formed in the rubber diaphragms 52, a plurality of deformation cavities 44 for deformation are formed in the energy-releasing pad 43, the energy-releasing pad 43 is deformed to relieve the amplitude through the deformation cavities 44 under the extrusion of the partition disc 42, ejection rods 59 for driving the ventilation slits to separate are fixedly connected to one side of the inner wall of the deformation cavities 44, the deformation cavities 44 drive the ejection rods 59 to move transversely to the ventilation slits, drive the rubber diaphragms 52 to open, force the annular receiving cavity 32 to communicate with the gas exchange holes 51, and can realize heat exchange. The elastic deformation ability of the rubber diaphragms 52 closes the ventilation slits, prevents foreign matters from entering the annular receiving cavity 32, the conical structure of the gas exchange holes 51 improves the gas exchange efficiency, the deformation cavities 44 enhance the deformation ability of the energy-releasing pad 43, improve the amplitude relief effect, and the ejection rods 59 realize the automatic opening and closing of the ventilation slits, ensure that the heat exchange is timely and does not affect the sealing performance. Embodiment

[0032] The embodiment discloses a special milling device for processing the sleeve pipe clamping groove and the wedge-shaped groove in the embodiment 1. Through the eccentric milling principle and the hydraulic drive side milling tooth telescopic mechanism, the precise processing of the wedge-shaped groove is realized; the pressure relief assembly (containing the non-Newton fluid buffer) ensures that the cutter smoothly extends, avoids the impact damage, and guarantees the processing precision and the cutter life.

[0033] The device comprises a milling machine body 6, a milling cutter 7 arranged at a cutter clamping position of the milling machine body 6, and a three-jaw chuck 61 fixedly connected to a machining table of the milling machine body 6, an outer sleeve 21 is fixedly connected to a clamping end of the three-jaw chuck 61, the milling cutter 7 comprises a tool shank 71, a main milling tooth 72 fixedly connected to a bottom end of the tool shank 71 and used for milling a clamping groove 23, and a milling assembly 8 arranged on an outer wall of the tool shank 71 and used for milling a wedge-shaped groove 28, the milling assembly 8 comprises a fixing seat 81 fixedly connected to the outer wall of the tool shank 71, a communication cavity 82 formed in the fixing seat 81, and a piston rod 83 movably arranged in the communication cavity 82, two side milling teeth 84 fixedly connected to both sides of an end portion of the piston rod 83 and used for milling the wedge-shaped groove 28, the side milling tooth 84 comprises a mounting portion 85 used for mounting and positioning, a first milling edge 86 used for milling an inclined wedge surface, and a second milling edge 87 used for milling a reference surface, when the tool shank 71 mills the wedge-shaped groove 28, an axis of the tool shank 71 is parallel to but offset from a center of an inner arc surface of the waist-shaped hole of the clamping groove 23, so that the tool shank 71 has an eccentricity with the inner arc surface, the first milling edge 86 and the second milling edge 87 of the two side milling teeth 84 are designed to have an inclined angle, and the relative inclination angle of the tool heads of the two first milling edges 86 and the two second milling edges 87 corresponds to a cutting length of the wedge-shaped groove 28, because the side milling tooth 84 has a fixed eccentricity with the position where the wedge-shaped groove 28 is formed, when the milling machine body 6 drives the tool shank 71 and the side milling tooth 84 to rotate back and forth according to the circumferential length of the wedge-shaped groove 28, if the tool shank 71 turns to the left side, the left side milling tooth 84 obtains a complete effective eccentricity for milling the waist-shaped hole, and the right side milling tooth 84 only obtains an invalid eccentricity (eccentricity reduction), so that the right side milling tooth 84 does not touch the hole wall, and as the milling machine body 6 continues to drive the tool shank 71 to further mill the clamping groove 23 during the reciprocating rotation, the wedge-shaped groove 28 can be completely formed, the milling cutter 7 further comprises a pressure transmission mechanism 9 used for driving the side milling tooth 84 to move out and a pressure relief assembly 10 used for protecting the side milling tooth 84, the pressure transmission mechanism 9 comprises an annular liquid storage groove 91 formed in the tool shank 71 and used for storing hydraulic liquid, and an annular piston 92 arranged in the annular liquid storage groove 91 and used for driving the hydraulic liquid to move, the movement of the annular piston 92 can drive the hydraulic liquid in the annular liquid storage groove 91 to flow to the communication cavity 82, so as to drive the side milling tooth 84 to move out, the pressure relief assembly 10 comprises an annular liquid storage cavity 101 formed in an inner cavity wall of the annular liquid storage groove 91 and used for storing non-Newtonian fluid, an annular gas storage cavity 102 formed in the inner cavity wall of the annular liquid storage groove 91, a plurality of communication holes 103 formed in an inner cavity wall of the annular liquid storage cavity 101 and used for communicating the annular gas storage cavity 102, an annular partition plate 104 fixedly connected to an outer arc surface of an inner wall of the annular liquid storage groove 91 and used for separating the annular liquid storage groove 91 and the annular liquid storage cavity 101, a plurality of hydraulic buffer cavities 105 formed in an outer portion of the annular partition plate 104,The hydraulic buffer cavity 105 gives the annular partition plate 104 the ability to elastically deform, so that when the annular cover 95 initially contacts the outer sleeve 21 and the hydraulic fluid is extruded by the annular piston 92, the buffer absorbs the instantaneous pressure impact of contacting the outer sleeve 21, avoids the instantaneous extension of the side milling teeth 84, provides protection for the side milling teeth 84, and when the annular partition plate 104 elastically deforms, it absorbs and dissipates part of the impact energy, and sharp force pulses are attenuated into a relatively gentle pressure rise process. Subsequently, this initially moderated pressure is transmitted to the chamber filled with non-Newtonian fluid, and when the non-Newtonian fluid is suddenly extruded, its molecular or particle structure will instantaneously interlock, behaving like a viscous paste or even a solid, and the transmission of pressure is strongly retarded and buffered, thereby ensuring the smoothness of the extension of the side milling teeth 84. In the subsequent continuous extension of the tool holder 71, the pressure transmitted by the annular cover 95 to the annular piston 92 tends to be stable, and the annular partition plate 104 transitions from the initial impact absorption state to the stable compression deformation state, providing a soft and continuous volume change space for the hydraulic oil, avoiding pressure fluctuations caused by sudden volume changes. At the same time, under stable and continuous shear, the internal structure of the non-Newtonian fluid maintains a dynamic balance, and the existence of the annular gas storage cavity 102, like a miniature gas spring, further absorbs the vibration of the tool holder 71 during the processing of the wedge-shaped groove 28. The combined action of the three ensures that the conversion relationship from the axial feed displacement to the radial extension displacement of the side milling teeth 84 is highly stable and linear. Therefore, as the tool continuously deepens in the reciprocating rotation, the side milling teeth 84 can smoothly extend at a constant rate, and the wedge-shaped groove 28 with uniformly increasing depth is milled into the inner wall of the clamping groove 23, providing reliable protection for the contour accuracy and smoothness. The storage level of the non-Newtonian fluid in the annular liquid storage cavity 101 is higher than the hydraulic buffer cavity 105 and lower than the communication hole 103, and the annular gas storage cavity 102 also provides deformation space for the non-Newtonian fluid.

[0034] Specifically, as shown in Figure 14 , the three-jaw chuck 61 is fixedly connected with a centering support column 62 inside for supporting the outer sleeve 21. The centering support column 62 supports the inside of the outer sleeve 21, and the centering support column 62 is in contact with the inner wall of the outer sleeve 21, ensuring that the centering support column 62 will not deviate during processing, providing protection for the machining accuracy of the clamping groove 23 and the wedge-shaped groove 28. The outer wall of the centering support column 62 is provided with a plurality of chip removal grooves for chip removal of the clamping groove 23. The chip removal grooves can provide chip removal space for the debris generated when the wedge-shaped groove 28 is drilled.

[0035] Further, as shown in Figure 18 , the tool holder 71 is fixedly connected with a counterweight 73 on one side of the outer wall for dynamic balance compensation. The weight of the counterweight 73 is equal to the weight of the milling assembly 8, providing protection for the stable cutting posture of the tool holder 71 and ensuring the milling accuracy.

[0036] As shown in Figures 17 to 22 the outer wall of the shank 71 is fixedly connected with a fixed cover 93, the inner arc surface of the fixed cover 93 is rotatably connected with an annular positioning seat 94, the annular positioning seat 94 is slidably connected with an annular cover 95 for extruding the outer sleeve 21, a plurality of drive rods 96 are rotatably connected with the inner wall of the fixed cover 93, one end of the drive rod 96 is rotatably connected with a roller 97, the roller 97 is in contact with the top outer wall of the annular cover 95, the other end of the drive rod 96 is rotatably connected with the outer wall of the annular piston 92, when the shank 71 is driven to extend into the clamping groove 23, the annular cover 95 remains stable on the outside of the outer sleeve 21, so that the annular cover 95 moves vertically in the fixed cover 93, and the annular piston 92 moves in the annular liquid storage groove 91 through the roller 97 and the drive rod 96, so as to drive the hydraulic oil in the annular liquid storage groove 91 to move the piston rod 83, and since the fixed cover 93 is rotatably connected with the annular positioning seat 94, the rotation of the shank 71 will not be transmitted to the annular cover 95, which ensures the extension accuracy of the side milling teeth 84, the annular cover 95 is fixedly connected with a protective pad towards the outer wall of the outer sleeve 21, the protective pad can protect the outer sleeve 21 and prevent the annular cover 95 from hard contact with the outer sleeve 21 to damage the outer sleeve 21, the outer wall of the drive rod 96 is fixedly connected with a return spring 98, the return spring 98 is used to support one end of the drive rod 96, when the annular cover 95 is separated from the outer sleeve 21, the return spring 98 releases the elastic force and pulls the annular piston 92 upwards to reset, through the backflow of hydraulic oil, the side milling teeth 84 and the piston rod 83 can be pulled back to reset, which ensures the smoothness of the milling tool 7 in the clamping groove 23.

[0037] As shown in Figures 18 to 24 the annular liquid storage cavity 101 is provided with a plurality of annular support discs 106 for supporting the annular partition plate 104, the inner and outer circles of the annular support disc 106 are fixedly connected with the outer arc surface of the annular partition plate 104 and the inner arc surface of the annular liquid storage cavity 101, respectively, a plurality of deformation grooves 107 are formed in the inner wall of the annular support disc 106, the deformation grooves 107 provide elastic deformation ability for the annular support disc 106, which can ensure the initial position of the annular partition plate 104 when the annular partition plate 104 is not stressed, and can inhibit the deformation path of the annular partition plate 104 when the annular partition plate 104 is extruded by the internal hydraulic oil pressure, so as to ensure the stability of the transmission path of the hydraulic oil and the uniformity of the pressure relief.

[0038] Working principle: the embodiment provides a segmented spring shock absorber and processing equipment, in use, the joint bearing 15 at the top end and the bottom end of the gas spring 1 realizes adaptive connection with external equipment, in the initial state, the initial compression amount of the light load spring 11 can be adjusted by adjusting the end cover 14, the top holding block forms stable top holding to the adjusting end cover 14, at this time, the light load spring 11 plays a role first, and vibration and impact in the light load working condition such as vehicle empty load are coped with, when the vehicle enters the heavy load working condition such as full load, the heavy load spring 12 synchronously intervenes, and the light load spring 11 cooperates to realize staged damping, in the vibration transmission process, the outer sleeve pipe 21 and the inner sleeve pipe 22 of the retainer 2 adopt a nested structure, effectively reducing the radial deviation, the elastic lug 24 on the inner sleeve pipe 22 is clamped into the clamping groove 23 of the outer sleeve pipe 21, the overall stability of the retainer 2 is enhanced, and the dislocation impact of the light load spring 11 and the heavy load spring 12 when subjected to stress is avoided, the limiting boss 25 accurately controls the movement range of the inner sleeve pipe 22, and the limiting ring 26 and the retainer 27 on the inner wall of the inner sleeve pipe 22 further limit the circumferential movement of the elastic lug 24, so that the elastic lug 24 is always accurately clamped into the clamping groove 23, when the periodic excitation caused by wheel-rail contact causes beat vibration, the load energy release device 3 starts to play a role, the alternating load generated by vibration is transmitted to the bearing disc 31, the bearing disc 31 weakens the beat vibration amplitude through the energy release protection mechanism 4 in the annular receiving cavity 32, the energy release pad 43 at the top end and the bottom end of the partition disc 42 is extruded and deformed through the internal deformation cavity 44 after the partition disc 42 moves up and down under the action of vibration force, directly relieving the vibration amplitude, the retaining ring 45 on the inner arc surface and the outer arc surface of the partition disc 42 ensures that the movement path in the annular receiving cavity 32 is stable and smooth, and the stress of the energy release pad 43 is uniform, in the initial low-temperature environment, the fixed column 41 and the sliding block 57 will move relatively with each other due to vibration, driving the friction pads 55 on the outer walls of the two to rub against each other and generate heat, the heat generated by friction is efficiently transmitted to the energy release pad 43 through the arc-shaped heat transfer plate 54, temperature compensation is realized, the working response speed of the energy release pad 43 in the low-temperature environment is improved, the temperature change plate 58 in the movable cavity 56 will deform and stretch straight with the change of the friction temperature, and then the position of the sliding block 57 is adjusted, when the temperature reaches the deformation temperature of the temperature change plate 58, the two friction pads 55 are controlled to be out of contact, and the heat preservation cover 35 at the bottom end of the bearing disc 31 reduces the influence of external temperature on the friction pads 55 and the sliding block 57, so that the friction heating efficiency is stable, in terms of air exchange and heat dissipation, when the deformation cavity 44 of the energy release pad 43 is extruded and deformed, the internal ejector rod 59 is driven to move horizontally to the ventilation channel in the air exchange hole 51, the rubber diaphragm 52 is pushed open, the annular receiving cavity 32 forms an air exchange channel with the outside through the air exchange hole 51, heat exchange between the inside and the outside is realized, heat decay of the energy release pad 43 due to high temperature caused by long-term damping is avoided, the air exchange hole 51 adopts a tapered structure and has a smaller diameter on the side of the annular receiving cavity 32, and is matched with the elastic deformation ability of the rubber diaphragm 52 to close the ventilation channel when the ejector rod 59 is not in action, preventing external foreign matters from entering the annular receiving cavity 32,The support ring 34 cooperates with the fixed column 41 to limit the axial movement track between the bearing disc 31 and the outer sleeve 21, and fix the outer sleeve 21 to the clamping end of the three-jaw chuck 61 at the machining table of the milling machine body 6. The centering support column 62 inside the three-jaw chuck 61 extends into the inside of the outer sleeve 21 and is attached to the inner wall, realizing the coaxial centering support of the outer sleeve 21. The relief groove on the outer wall of the centering support column 62 reserves the space for the discharge of the debris generated when the wedge-shaped groove 28 is opened. At the same time, the milling cutter 7 at the tool clamping position of the milling machine body 6 completes the initial positioning. First, the milling machine body 6 drives the tool holder 71 and the main milling teeth 72 to follow the machining path of the waist-shaped hole of the clamping-in groove 23 to perform milling machining, until the clamping-in groove 23 is machined completely. Then, the axis of the tool holder 71 is kept parallel and offset to the center of the inner arc surface of the waist-shaped hole of the clamping-in groove 23, forming a fixed eccentricity, and the counterweight 73 on the outer wall of the tool holder 71 is equal in weight to the milling assembly 8, realizing the dynamic balance of the rotation of the tool holder 71. As the tool holder 71 continuously extends along the axial direction of the clamping-in groove 23, the annular cover 95 on the fixed cover 93 of the tool holder 71 contacts the outer side of the outer sleeve 21 and keeps the position stable. The protective pad on the annular cover 95 towards the outer wall of the outer sleeve 21 can avoid the damage of the outer sleeve 21 caused by the hard contact between the two. The axial feed of the tool holder 71 makes the annular cover 95 move vertically relative to the annular positioning seat 94. The annular positioning seat 94 is rotationally connected with the fixed cover 93, which can prevent the rotational movement of the tool holder 71 from being transmitted to the annular cover 95. When the annular cover 95 moves, the roller 97 at the top end pushes the driving rod 96 to rotate around the hinge point, and the other end of the driving rod 96 drives the annular piston 92 to move downward in the annular liquid storage groove 91 inside the tool holder 71. After the hydraulic liquid stored in the annular liquid storage groove 91 is extruded, it flows to the communication cavity 82 of the fixed seat 81 of the milling assembly 8, pushes the piston rod 83 in the communication cavity 82 to extend radially, and then drives the side milling teeth 84 on both sides of the end of the piston rod 83 to move out synchronously. The installation part 85 of the side milling teeth 84 realizes its own positioning and installation. The first milling edge 86 and the second milling edge 87 are designed with an inclination angle that is suitable for the wedge-shaped groove 28. The relative inclination angle of the tool bits of the two first milling edges 86 and the two second milling edges 87 corresponds to the cutting length of the wedge-shaped groove 28, meeting the milling requirements of the inclined wedge surface and the reference surface of the wedge-shaped groove 28. In the process of the hydraulic liquid pushing the side milling teeth 84 to extend, the pressure relief assembly 10 realizes multi-stage buffer protection. The non-Newtonian fluid is contained in the annular liquid storage cavity 101 on the cavity wall of the annular liquid storage groove 91. The annular gas storage cavity 102 is connected with the annular liquid storage cavity 101 through the communication hole 103. The annular partition plate 104 separates the annular liquid storage groove 91 from the annular liquid storage cavity 101, avoiding the mixing of the hydraulic liquid and the non-Newtonian fluid, and ensuring the driving precision and efficiency of the hydraulic liquid. The hydraulic buffer cavity 105 outside the annular partition plate 104 provides the elastic deformation ability for it. When the annular piston 92 extrudes the hydraulic liquid instantaneously, it absorbs the pressure impact, converts the sharp force pulse into a gentle pressure rising process, and further blocks the buffer pressure transmission when the non-Newtonian fluid is suddenly extruded and its molecular structure is instantaneously interlocked to form a solid-like state.The annular support disc 106 in the annular liquid storage cavity 101 is deformed by the elastic deformation of the deformation groove 107, which ensures the stability of the initial position of the annular partition plate 104 and inhibits the deformation path of the annular partition plate 104 under stress, ensures the uniformity of pressure relief, and the annular gas storage cavity 102 can also absorb the milling vibration of the tool holder 71 and provide a deformation space for the non-Newtonian fluid. Then the milling machine body 6 drives the tool holder 71 to drive the side milling teeth 84 to make reciprocating rotary motion according to the circumferential length of the wedge-shaped groove 28, and the differential milling is realized by the fixed eccentricity of the tool holder 71 and the waist-shaped hole of the clamping groove 23. When the tool holder 71 turns to the left side, the left side milling teeth 84 obtain complete and effective eccentricity, and the first milling edge 86 and the second milling edge 87 of the left side milling teeth 84 mill the corresponding surface of the wedge-shaped groove 28. The right side milling teeth 84 only obtain invalid eccentricity due to the eccentricity reduction and do not contact the hole wall. With the continuous deepening of the tool holder 71 in the reciprocating rotation in the clamping groove 23, the wedge-shaped groove 28 is gradually and completely opened with uniform and increasing depth. When the machining is completed, the milling machine body 6 drives the milling cutter 7 to move axially upward, the annular cover 95 is separated from the outer sleeve 21, the reset spring 98 on the outer wall of the driving rod 96 releases the elastic force, the driving rod 96 is reversely rotated and drives the annular piston 92 to move upward and reset, the hydraulic liquid flows back to pull the piston rod 83 and the side milling teeth 84 to retract to the initial position, and the milling cutter 7 is smoothly removed from the clamping groove 23, and the whole machining process is completed.

[0039] The embodiments of the present application are disclosed, but are not limited to the embodiments, and those skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, which are within the protection scope of the present application.

Claims

1. A segmented series spring damper, characterized in that, include: Gas spring (1), with a first bearing plate (13) and a second bearing plate (16) respectively provided on the outer walls of both ends of the gas spring (1); A heavy-duty spring (12) is disposed on one side of the first bearing plate (13); A light-load spring (11) is disposed on one side of the second bearing plate (16); A retainer (2) is disposed between the light-load spring (11) and the heavy-load spring (12); the retainer (2) includes an outer sleeve (21) and an inner sleeve (22) nested together. The outer sleeve (21) has a plurality of slots (23) on its outer wall, and the inner sleeve (22) has a plurality of elastic protrusions (24) that can be inserted into the slots (23).

2. The spring shock absorber according to claim 1, characterized in that, The outer sleeve (21) has a wedge-shaped groove (28) on the arc-shaped part of the hole wall. The elastic protrusion (24) has a wedge-shaped block that is adapted to the wedge-shaped groove (28) fixedly connected to one side of the outer wall. The wedge-shaped block swings with the elastic protrusion (24) and enters the slot (23).

3. The spring shock absorber according to claim 1, characterized in that, The inner wall of the inner sleeve (22) is provided with a limiting ring (26) for supporting a plurality of elastic protrusions (24), and the outer wall of the limiting ring (26) is fixedly connected with a plurality of retainers (27) for restricting the circumferential movement of the elastic protrusions (24).

4. The spring shock absorber according to claim 1, characterized in that, The retainer (2) is also provided with: The load release device (3) includes a support plate (31) and an annular receiving cavity (32) opened inside the support plate (31). The energy release protection mechanism (4) includes a partition plate (42) disposed in the annular storage cavity (32) and an energy release pad (43) disposed on the partition plate (42), the energy release pad (43) being used to absorb vibration energy; The temperature adaptation component (5) includes a ventilation hole (51) for ventilation and heat dissipation of the annular storage cavity (32) and a friction pad (55) for frictional heat generation, wherein the heat generated by the friction pad (55) can be transferred to the energy release pad (43).

5. The spring damper according to claim 4, characterized in that, The temperature adaptation component (5) also includes: Heat-conducting column (53) disposed inside the annular receiving cavity (32); A slider (57) is installed inside the movable cavity (56) of the annular storage cavity (32). The outer wall of the slider (57) and the outer wall of the heat-conducting column (53) are both provided with friction pads (55). A temperature-sensitive plate (58) is disposed between the inner wall of the active cavity (56) and the slider (57). The temperature-sensitive plate (58) can deform with temperature changes to adjust the contact state between the two friction pads (55). An arc-shaped heat transfer plate (54) is disposed at the end of the heat-conducting column (53) and in contact with the energy-releasing pad (43) to transfer the heat generated by friction to the energy-releasing pad (43).

6. A milling machine for machining the insertion groove and wedge groove of the spring damper as described in claim 2, characterized in that, include: Milling machine body (6); The milling cutter (7) includes a shank (71), a main milling tooth (72) disposed at the end of the shank (71), and a milling assembly (8) disposed on the outer wall of the shank (71); the milling assembly (8) includes a side milling tooth (84) capable of radial extension and retraction. Pressure transmission mechanism (9) is used to convert the axial feed motion of the tool holder (71) into the radial extension motion of the side milling tooth (84); The pressure relief assembly (10) includes an annular reservoir (101) for storing non-Newtonian fluid and an annular partition (104) with elastic deformation capability for buffering the pressure impact when the side milling teeth (84) extend. When the tool holder (71) processes the wedge groove (28), there is an eccentricity between the axis of the tool holder (71) and the center of the inner arc surface of the groove (23).

7. The milling equipment according to claim 6, characterized in that, The pressure transmission mechanism (9) includes: An annular reservoir (91) is formed inside the tool holder (71) for storing hydraulic fluid. An annular piston (92) is disposed inside the annular reservoir (91). A fixed cover (93) is fixedly connected to the outer wall of the handle (71), and an annular positioning seat (94) is rotatably installed inside the fixed cover (93). An annular cover (95) is slidably installed inside the annular positioning seat (94) for contacting the outer wall of the outer sleeve (21). A drive rod (96) is rotatably installed inside the fixed cover (93). One end of the drive rod (96) is rotatably installed with a roller (97) that contacts the top of the annular cover (95), and the other end is rotatably connected to the annular piston (92). A reset spring (98) is provided on the outer wall of the drive rod (96) for pulling the annular piston (92) back to its original position.

8. The milling equipment according to claim 6, characterized in that, The pressure relief component (10) also includes: An annular gas storage chamber (102) is formed in the inner wall of the annular liquid storage tank (91). A connecting hole (103) is provided in the inner wall of the annular liquid storage chamber (101) to connect the annular liquid storage chamber (101) and the annular gas storage chamber (102). A hydraulic buffer cavity (105) is provided outside the annular partition plate (104) to provide the annular partition plate (104) with elastic deformation capability. A plurality of annular support disks (106) are disposed inside the annular liquid storage cavity (101). The inner ring of the annular support disk (106) is fixedly connected to the outer wall of the annular partition plate (104), and the outer ring is fixedly connected to the inner wall of the annular liquid storage cavity (101). A plurality of deformation grooves (107) for deformation are opened inside the annular support disk (106).

9. The milling equipment according to claim 6, characterized in that, The milling assembly (8) includes a fixed base (81) fixedly connected to the outer wall of the tool holder (71). The fixed base (81) has a communicating cavity (82) inside. A piston rod (83) is movably installed in the communicating cavity (82). The side milling teeth (84) are fixedly connected to both sides of the end of the piston rod (83). The side milling teeth (84) include a mounting part (85) for mounting and positioning, a first milling cutter (86) for milling the wedge surface of the wedge groove (28), and a second milling cutter (87) for milling the reference surface.

10. The milling equipment according to claim 6, characterized in that, It also includes a three-jaw chuck (61) fixedly connected to the machining table of the milling machine body (6). The three-jaw chuck (61) has a centering support column (62) fixedly connected inside for extending into the inner wall of the outer sleeve (21) and fitting against its inner wall. The outer wall of the centering support column (62) has a chip removal groove.

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