CN212804016U - Wedge block type piston gap adjusting device and aviation brake device piston - Google Patents
Wedge block type piston gap adjusting device and aviation brake device piston Download PDFInfo
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- CN212804016U CN212804016U CN202020622691.XU CN202020622691U CN212804016U CN 212804016 U CN212804016 U CN 212804016U CN 202020622691 U CN202020622691 U CN 202020622691U CN 212804016 U CN212804016 U CN 212804016U
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Abstract
The embodiment of the utility model discloses wedge block formula piston gap adjusting device and aviation brake equipment piston. The wedge block assembly in the gap adjusting device comprises at least three wedge blocks; the sleeve comprises a sleeve body and a sleeve base; one end of the pull rod penetrates through the sleeve body, and the wedge block assembly, the thrust seat, the disc spring assembly and the compression screw plug are uniformly distributed in the sleeve body; the wedge block assembly is abutted against the inner wall of the second end face of the sleeve, and the plurality of wedge blocks are uniformly arranged outside the pull rod in a surrounding mode along the circumferential direction of the pull rod; the thrust seat is partially nested outside the wedge block assembly, the disc spring assembly is nested outside the pull rod, and one end surface of the disc spring assembly abuts against the end surface of the thrust seat; one end of the compression screw plug is provided with a concave hole which is used for being nested at one end of the pull rod and abutting against the other end face of the disc spring component. The embodiment of the utility model provides an eliminated current automatic clearance mechanism machining precision to the influence of piston performance, realized a repeatedly usable, reduced part manufacturing cost, improved and drawn the qualification rate of taking off power and the wedge type piston clearance adjustment device of stability.
Description
Technical Field
The application relates to the technical field of but not limited to aeronautical machinery, in particular to a wedge type piston gap adjusting device for an aerobraking wheel and an aerobraking device piston.
Background
In order to improve the stability of the braking performance and the braking sensitivity, the modern aircraft wheel adopts an automatic clearance adjusting mechanism. The functions are as follows: after the aircraft is braked by landing for many times, the distance between the piston and the pressing disc is increased due to the abrasion of the brake disc, and the automatic gap adjusting mechanism can automatically adjust the gap between the piston and the pressing disc to meet the specified requirement.
The automatic gap adjusting mechanism commonly used at home and abroad at present is divided into two types according to the pulling-out force: a spring sleeve type automatic clearance adjusting mechanism (shown in figure 1) and an expansion pipe type automatic clearance adjusting mechanism (shown in figure 3). The pulling-out force of the spring sleeve type automatic clearance adjusting mechanism comes from the radial interference fit between the pull rod and the spring sleeve, and the pulling-out force is greatly influenced by the self rigidity of the spring sleeve, the environmental temperature, the manufacturing error, the lubricating medium, the surface processing quality and the like; because the spring housing part processing route is long, the precision requirement is high, the wrapping force is unstable under the influence of temperature, pulling-out speed and the like, and the problems of low finished product yield, large pulling-out force attenuation and the like exist. The pulling-out force of the expansion pipe type automatic gap adjusting mechanism is derived from the plastic deformation of the expansion pipe, and is greatly influenced by the plastic deformation performance of materials, the manufacturing error of a ball head, a lubricating medium and the surface processing quality; due to the poor batch stability of materials for manufacturing the expansion pipes in China and the defect of one-time use of the expansion pipes, the popularization and the application of the structure are restricted.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the embodiment of the utility model provides a wedge type piston clearance adjustment device and aviation brake device piston to eliminate the influence of current automatic clearance adjustment mechanism machining precision to the piston performance, realize a repeatedly usable, reduce part manufacturing cost, improve the wedge type piston clearance adjustment device of the qualification rate of drawing out power and stability.
The embodiment of the utility model provides a wedge block formula piston gap adjusting device, include: the device comprises a sleeve, a wedge block assembly, a pull rod, a thrust seat, a disc spring assembly and a compression screw plug, wherein the wedge block assembly comprises at least three wedge blocks;
the sleeve comprises a sleeve body and a sleeve base vertically arranged on the outer side of the first end face of the sleeve body, a second through hole is formed in the second end face, far away from the sleeve base, of the sleeve body, and a first through hole is formed in the sleeve base; one end of the pull rod penetrates through the second through hole of the sleeve body, and the wedge block assembly, the thrust seat, the disc spring assembly and the compression screw plug are uniformly distributed in the sleeve body;
the wedge block assembly abuts against the inner wall of the second end face, and the plurality of wedge blocks are uniformly arranged in a surrounding mode along the circumferential direction of the pull rod and attached to the outer portion of the pull rod; the thrust seat is of a circular ring structure, and the thrust seat part is nested outside the wedge block assembly; the disc spring assembly is nested outside the pull rod, and one end face of the disc spring assembly abuts against the end face of the thrust seat; and one end of the compression screw plug is provided with a concave hole for being nested at one end of the pull rod embedded sleeve and abutting against the other end surface of the disc spring assembly.
Optionally, in the wedge-type piston gap adjusting device as described above, the wedge assembly includes three wedges, each wedge is arranged at an angle of 115 degrees along the axial direction of the pull rod, and a gap is formed between adjacent wedges.
Optionally, in the wedge type piston clearance adjusting device, the cross section of the wedge along the axial direction of the pull rod is a right trapezoid, and the acute angle of the right trapezoid is between 80 degrees and 88 degrees.
Optionally, in the wedge type piston gap adjusting device, the taper of the inner annular surface of the thrust seat is the same as that of the wedge block assembly, and the width of the inner annular surface of the thrust seat nested with the wedge block assembly is two thirds of the width of the thrust seat;
the thrust block is configured to compress the wedge assembly such that the wedge assembly exerts radial pressure on the tie rod.
Optionally, in the wedge type piston backlash adjustment device as described above, a coefficient of friction of the thrust seat with the wedge assembly is less than a friction threshold.
Optionally, in the wedge type piston clearance adjusting apparatus as described above, the disc spring assembly is formed by stacking n disc springs in an axial direction of the drawbar, where n is an even number.
Optionally, in the wedge type piston gap adjusting device as described above, an inner surface of the first end surface of the sleeve body is provided with an internal thread, and the other end of the compression plug screw is provided with an external thread matching the internal thread;
the compression screw plug is configured to compress the disc spring assembly and provide pre-pressure for the thrust seat.
The embodiment of the utility model provides a still provide an aviation brake equipment piston, include: the wedge type piston gap adjusting device comprises a cylinder seat assembly, a piston bushing embedded in the cylinder seat assembly, and a piston embedded in the piston bushing, wherein the wedge type piston gap adjusting device is arranged in the piston, a return spring is embedded outside the wedge type piston gap adjusting device, and a screw cap is embedded in one end, close to the pull rod handle, of the piston.
The wedge block type piston gap adjusting device and the aviation brake device piston provided by the embodiment of the utility model control the precompression force of the disc spring assembly by adjusting the screwing-in depth of the compression screw plug, so that the thrust block compresses the wedge block assembly; the wedge block assembly is matched with the taper angle of the thrust seat, and the pre-compression force is converted and amplified into radial pressure of the wedge block assembly on the pull rod, so that the pull rod is compressed; when the pull rod appears sliding trend relatively to the voussoir subassembly axial, produce frictional force between pull rod and the voussoir subassembly, this frictional force is the embodiment of the utility model provides an in wedge type piston gap adjusting device draw the power of taking off. In addition, the embodiment of the utility model provides an adopt the packing force of dish spring subassembly to produce and draw the disengaging force, along with the wearing and tearing volume of brake disc, the precompression volume that can adjust the pressure of spring is pre-stressed to control the pulling and disengaging force of this wedge block formula piston clearance adjustment device; therefore, the influence of the manufacturing errors of the wedge block assembly, the thrust seat and the spring on the pulling-out force is eliminated, and the rejection rate of parts is greatly reduced. Furthermore, the embodiment of the utility model provides a wedge type piston gap adjusting device can repeat repetitious usage, is showing and is reducing part manufacturing cost.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention.
FIG. 1 is a schematic structural diagram of a spring-sleeve type automatic gap adjusting mechanism in the prior art;
FIG. 2 is a schematic diagram of the spring sleeve type automatic gap adjusting mechanism shown in FIG. 1;
FIG. 3 is a schematic structural diagram of an expanding tube type automatic gap adjusting mechanism in the prior art;
fig. 4 is a schematic structural diagram of a wedge type piston gap adjusting device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wedge assembly in a wedge-type piston gap adjusting device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an aviation brake device piston provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
It has been described in the above background that the currently commonly used automatic gap adjustment mechanisms are classified into two types according to the pull-off force: spring sleeve type automatic gap adjusting mechanism and expansion pipe type automatic gap adjusting mechanism.
Fig. 1 is a schematic structural diagram of a spring sleeve type automatic clearance adjustment mechanism in the prior art, and fig. 2 is a schematic diagram of the spring sleeve type automatic clearance adjustment mechanism shown in fig. 1. The spring sleeve type automatic gap adjusting mechanism shown in fig. 1 may include: the brake disc comprises a cylinder seat assembly 1, a lining 2, a pull rod 3, a return spring 4, a screw cap 5, a sleeve 6, a spring sleeve 7, a support sleeve 8, a piston 9 and a brake disc assembly 10. Fig. 1 shows the initial brake releasing state, fig. 2 shows the brake releasing state when the brake disc is worn, and the working principle of the spring sleeve type automatic clearance adjusting mechanism is as follows: referring to fig. 1 and 2, the "delta" value of the brake disc wear increases the piston stroke after a number of brakes. When the screw cap 5 moves to the value of "b", the screw cap will touch the end surface K of the sleeve 6, and because the thrust of the piston 9 is far greater than the pulling-out force generated by the friction of the interference fit between the spring sleeve 7 and the pull rod 3, the screw cap 5 will push the sleeve 6 to move forward to the value of "delta", and the normal braking after abrasion is ensured. When the brake is released, the piston 9 returns to the value of 'b' because the pulling-out force of the spring sleeve 7 and the pull rod 3 is greater than the pressure of the return spring 4, and the whole piston 9 moves forwards by the value of 'delta'; therefore, the piston 9 moves to a value of 'b' when braking every time, and the purposes of controlling the stroke of the piston 9 and improving the braking sensitivity are achieved.
Fig. 3 is a schematic structural diagram of an expanding tube type automatic gap adjusting mechanism in the prior art. The expanding tube type automatic gap adjusting mechanism shown in fig. 3 may include: the cylinder block assembly comprises a cylinder block assembly 1, a lining 2, a force transmission plate 3, a piston 4, a pull rod 5, an expansion pipe 6, a ball head 7, a nut 8 and a return spring 9. The pulling-out force of the expansion pipe type automatic gap adjusting mechanism is the force which causes the expansion pipe 6 to generate plastic deformation when the bulb 7 moves along the axial direction of the expansion pipe 6 and causes the expansion pipe 6 to generate plastic deformation.
Aiming at the spring sleeve type automatic clearance adjusting mechanism, the problems of low finished product yield, large pull-out force attenuation and the like exist because the processing route of the spring sleeve part is long, the precision requirement is high, and the wrapping force is unstable under the influence of temperature, pull-out speed and the like. Aiming at the expansion pipe type automatic gap adjusting mechanism, the expansion pipe type expansion pipe has the defects of one-time use and restriction on the popularization and application of the structure due to poor batch stability of materials for manufacturing the expansion pipe in China.
In view of the problem that several kinds of automatic clearance adjustment mechanism forms exist above, the embodiment of the utility model provides a can eliminate the machining precision influence, but reuse reduces part manufacturing cost, improves the qualification rate of drawing the power of taking off and the wedge type piston clearance adjustment mechanism of stability.
The present invention provides that several specific embodiments below may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 4 is a schematic structural diagram of a wedge type piston gap adjusting device according to an embodiment of the present invention. The wedge type piston gap adjusting device provided by the embodiment can comprise: the wedge assembly comprises a sleeve 1, a wedge assembly 3, a pull rod 4, a thrust seat 5, a disc spring assembly 2 and a compression screw plug 6, wherein the wedge assembly 3 comprises at least three wedges.
As shown in fig. 4, the wedge-type piston gap adjusting device according to the embodiment of the present invention includes a sleeve body and a sleeve base vertically disposed outside a first end surface of the sleeve body, wherein a second end surface of the sleeve body, which is far away from the sleeve base, is provided with a second through hole, and the sleeve base is provided with a first through hole; one end of the pull rod 4 penetrates through a second through hole of the sleeve body, and the wedge block component 3, the thrust seat 5, the disc spring component 2 and the compression screw plug 6 are uniformly distributed in the sleeve body.
In the wedge type piston gap adjusting device provided by the embodiment of the utility model, the wedge block component 3 is propped against the inner wall of the second end surface of the sleeve 1, and a plurality of wedges are uniformly arranged around the circumference of the pull rod 4 and are attached to the outer part of the pull rod 4; in the embodiment of the utility model, the thrust bearing 5 is a circular ring structure, the thrust bearing 5 is partially embedded outside the wedge block component 3, the disc spring component 2 is embedded outside the pull rod 4, and one end face of the disc spring component 2 is abutted against the end face of the thrust bearing 5; one end of the compression screw plug 6 is provided with a concave hole for being nested at one end of the pull rod 4 embedded in the sleeve 1 and abutting against the other end surface of the disc spring component 2.
In practical application, the pull rod 4 in the embodiment of the present invention may be a rod structure, for example, a structure formed by overlapping a cylindrical section and a plate-shaped portion. The plate-like portion is called a head portion, and has a thickness of, for example, 5 mm; the diameter of the cylindrical section is called as the diameter of the pull rod, and can be set to be 4-6 mm. The connecting area of the cylindrical section and the plate-shaped part is provided with circular arc transition.
Optionally, the sleeve 1 in the embodiment of the present invention may be a rotating body formed by sequentially nesting a large ring, a small ring and a cylinder. The small ring is arranged at one end of the cylinder for inserting the pull rod 4, the outer diameter of the small ring is the same as the inner diameter of the cylinder, the inner diameter of the small ring is slightly larger than the diameter of the pull rod, and the thickness of the small ring can be 3 mm; the large ring is arranged at the other end of the cylinder, the inner diameter of the large ring is the same as the outer diameter of the cylinder, the outer diameter of the large ring is larger than the outer diameter of the cylinder, and the thickness of the large ring can be 3 mm. The outer diameter of the cylinder is 1-2 mm smaller than the inner diameter of the return spring, and the wall thickness is 1.5 mm. In practical application, the inner surface of the cylinder close to one side of the large circular ring is provided with internal threads with the specification of M12-M15.
Optionally, the disc spring assembly 2 in the embodiment of the present invention is formed by stacking n disc springs in the axial direction of the pull rod 4, where n is an even number. That is, the disc spring assembly 2 is formed by combining single disc spring pieces, and the disc spring pieces can be selected from standard parts, or can be selected from self-made parts by calculation due to the size limitation of the sleeve 1. In one implementation mode, the disc spring combination mode is formed by stacking single disc springs in the same direction, the number of disc springs in each group is n (n is calculated and rounded through the rigidity of the disc spring group), each wedge type piston gap adjusting device can select i groups of disc spring groups according to the size of the sleeve 1 and the requirement of the spring compression amount, i preferably takes even number pairs, and the disc springs are assembled in a positive and negative mode and the small ends of the disc springs are prevented from being used as supporting surfaces as far as possible.
Optionally, fig. 5 is a schematic structural diagram of a wedge assembly in a wedge-type piston gap adjusting device according to an embodiment of the present invention. The wedge block assembly 3 in the embodiment of the present invention may include three wedge blocks distributed along the circumference of the pull rod, the inner cylindrical surface of the wedge block is attached to the cylindrical surface of the pull rod, and each wedge block encloses an angle of 115 degrees along the axial direction of the pull rod 4, i.e. each wedge block is a revolution body rotating around the axis of the pull rod 4 by 115 degrees, and a gap is formed between adjacent wedge blocks; the wedge has a right-angled trapezoid cross section, and the acute trapezoid angle of the right-angled trapezoid is, for example, 88 to 80 °. Fig. 5 is a sectional view taken along a-a in fig. 4, and fig. 4 shows a structure for detaching the thrust bearing 5.
Optionally, the taper of the inner annular surface of the thrust bearing 5 in the embodiment of the present invention is the same as the taper of the wedge assembly 3, and the width (i.e., the width of the contact) nested with the wedge assembly may be two thirds of the width of the thrust bearing 5. The embodiment of the utility model provides an in the thrust bearing 5 is configured to compress tightly wedge subassembly 3 for wedge subassembly 3 produces radial pressure to pull rod 4, and 5 materials of thrust bearing select to consider with the coefficient of friction of voussoir as little as possible, so that the coefficient of friction of thrust bearing 5 and wedge subassembly 3 is less than the friction threshold value.
Optionally, in the embodiment of the present invention, an internal thread is disposed on an inner surface of the first end surface of the sleeve body, and an external thread matched with the internal thread is disposed on the other end of the compression plug 6; accordingly, the compression screw 6 is configured to compress the disc spring assembly 2 and provide a pre-pressure to the thrust seat 5.
In practical application, the basic shape of the compression screw plug 6 can be a cylinder with external threads; the bottom of the pull rod is provided with a counter bore with an inner hexagonal shape or four corners, the depth of the counter bore is 3-5 mm, and the middle of the pull rod is provided with a through hole with the diameter slightly larger than that of the pull rod; the thread diameter of which is the same as the thread diameter of the sleeve 1. The compression screw plug 6 is used for compressing the disc spring assembly 2 and providing pre-pressure for the thrust seat 5.
The wedge type piston gap adjusting device provided by the embodiment of the utility model can be regarded as a wedge type automatic gap adjusting mechanism according to the pulling-out force generating method, and the precompression force of a disc spring assembly is controlled by adjusting the screwing-in depth of a compression screw plug, so that a thrust seat compresses the wedge assembly; the wedge block assembly is matched with the taper angle of the thrust seat, and the pre-compression force is converted and amplified into radial pressure of the wedge block assembly on the pull rod, so that the pull rod is compressed; when the pull rod appears sliding trend relatively to the voussoir subassembly axial, produce frictional force between pull rod and the voussoir subassembly, this frictional force is the embodiment of the utility model provides an in wedge type piston gap adjusting device draw the power of taking off. In addition, the embodiment of the utility model provides an adopt the packing force of dish spring subassembly to produce and draw the disengaging force, along with the wearing and tearing volume of brake disc, the precompression volume that can adjust the pressure of spring is pre-stressed to control the pulling and disengaging force of this wedge block formula piston clearance adjustment device; therefore, the influence of the manufacturing errors of the wedge block assembly, the thrust seat and the spring on the pulling-out force is eliminated, and the rejection rate of parts is greatly reduced. Furthermore, the embodiment of the utility model provides a wedge type piston gap adjusting device can repeat repetitious usage, is showing and is reducing part manufacturing cost.
Based on the utility model discloses realize the wedge type piston gap adjusting device that above-mentioned embodiment provided, the embodiment of the utility model provides a still provide an aircraft brake device piston, fig. 6 is the utility model provides an aircraft brake device piston's schematic structure diagram, this piston can include: the piston rod comprises a cylinder seat assembly (not shown in figure 3), a piston bushing 7 nested inside the cylinder seat assembly, and a piston 8 nested inside the piston bushing 7, wherein a wedge type piston gap adjusting device in any one embodiment is arranged inside the piston 8, a return spring 9 is nested outside the wedge type piston gap adjusting device, and a screw cap 10 is nested inside one end, close to a pull rod, of the piston 8.
The following describes in detail an implementation of the wedge type piston backlash adjusting device according to an embodiment of the present invention with reference to a specific embodiment.
Taking a piston of a braking device of a certain type of airplane wheel as an example, the parameters of the piston are as follows: the inner diameter of the return spring is 17mm, and the pull-off force is 2000N.
In the embodiment, the wall thickness of the sleeve 1 is 2mm, the major diameter of the inner cavity is 12mm, and the minor diameter of the inner cavity is 5.3 mm. The big-end internal thread M12 has the thread depth of 10 mm.
The disc spring component 2 is formed by combining and overlapping GB-T1972-2005 phi 10 multiplied by phi 5.2 multiplied by 0.5 multiplied by 0.75-C1 type disc spring sheets, the outer diameter of each disc spring sheet is 10mm, the inner diameter of each disc spring sheet is 5.2mm, the thickness of each disc spring sheet is 0.5mm, and the free height of each disc spring sheet is 0.75 mm. Each set of disc spring set comprises 3 disc spring pieces, and 6 sets of disc spring sets are used in total.
The wedge 3 is made of 45 steel and designed with a cone angle of 3 degrees. 3 blocks are uniformly arranged in the sleeve to wrap the pull rod.
The diameter of the pull rod 4 is 5mm, and the material is copper alloy.
The cone angle of the inner surface of the thrust seat 5 is 3 degrees, and the material is QT 600-3.
The compression screw plug 6 is tapped with a thread M12, and the length of the thread is 7 mm. The diameter of the unthreaded cylindrical surface is 10mm, and the diameter of the lightening hole is 6 mm.
The embodiment considers all friction of the whole clearance adjusting mechanism, the design pre-compression amount is 1mm, and the calculated pre-compression force is 800N, wherein the disc spring friction coefficient is 0.015. The radial pressure of the thrust seat 5 on the wedge block 3 is calculated to be 15184N, wherein the friction coefficient of the thrust seat and the wedge block is 0.1, and the maximum friction force of the wedge block 3 and the pull rod is calculated to be 2277N, namely the friction force is the pull-out force of the wedge block type automatic clearance adjusting mechanism. The pulling-out force of the embodiment is larger than 2000N required by the spring sleeve type gap adjusting mechanism, and the structural size meets the space requirement of the plunger.
Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A wedge type piston lash adjuster, comprising: the wedge block assembly comprises a sleeve, a wedge block assembly, a pull rod with a pull rod handle, a thrust seat, a disc spring assembly and a compression screw plug;
the sleeve comprises a sleeve body and a sleeve base vertically arranged on the outer side of the first end face of the sleeve body, a second through hole is formed in the second end face, far away from the sleeve base, of the sleeve body, and a first through hole is formed in the sleeve base; the end part of the pull rod penetrates through the second through hole of the sleeve body, and the wedge block assembly, the thrust seat, the disc spring assembly and the compression screw plug are uniformly distributed in the sleeve body;
the wedge block assembly abuts against the inner wall of the second end face, and a plurality of wedge blocks in the wedge block assembly are uniformly arranged in a surrounding mode along the circumferential direction of the pull rod and attached to the outer portion of the pull rod; the thrust seat part is nested outside the wedge block assembly; the disc spring assembly is nested outside the pull rod, and one end face of the disc spring assembly abuts against the end face of the thrust seat; and one end of the compression screw plug is provided with a concave hole for being nested at one end of the pull rod embedded sleeve and abutting against the other end surface of the disc spring assembly.
2. A sprag-type piston shim device according to claim 1 wherein the sprag assembly includes three sprags, each sprag being angled at 115 degrees along the axial extent of the drawbar with a gap between adjacent sprags.
3. The sprag-type piston lash adjuster according to claim 2, wherein the sprag has a right-angled trapezoid shape in an axial cross section of the drawbar, and an acute angle of the right-angled trapezoid is between 80 and 88 degrees.
4. A sprag-type piston shim device according to claim 1, wherein the taper of the inner annular surface of the thrust block is the same as the taper of the sprag assembly, and the width of the nest with the sprag assembly is two thirds of the width of the thrust block;
the thrust block is configured to compress the wedge assembly such that the wedge assembly exerts radial pressure on the tie rod.
5. A sprag-type piston lash adjuster according to claim 4 wherein the coefficient of friction of the thrust block with the sprag assembly is less than a friction threshold.
6. The sprag-type piston backlash adjusting device according to claim 1, wherein the disc spring assembly is formed by stacking n disc springs in an axial direction of the drawbar, and n is an even number.
7. The wedge type piston gap adjusting device according to claim 1, wherein an inner surface of the first end surface of the sleeve body is provided with an internal thread, and the other end of the compression plug screw is provided with an external thread matched with the internal thread;
the compression screw plug is configured to compress the disc spring assembly and provide pre-pressure for the thrust seat.
8. An aircraft brake piston, comprising: the wedge type piston gap adjusting device comprises a cylinder seat assembly, a piston bushing embedded in the cylinder seat assembly, and a piston embedded in the piston bushing, wherein the wedge type piston gap adjusting device as claimed in any one of claims 1-7 is arranged in the piston, a return spring is embedded outside the wedge type piston gap adjusting device, and a screw cap is embedded in one end, close to the pull rod handle, of the piston.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020622691.XU CN212804016U (en) | 2020-04-22 | 2020-04-22 | Wedge block type piston gap adjusting device and aviation brake device piston |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020622691.XU CN212804016U (en) | 2020-04-22 | 2020-04-22 | Wedge block type piston gap adjusting device and aviation brake device piston |
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| CN212804016U true CN212804016U (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944708A (en) * | 2021-10-17 | 2022-01-18 | 西安航空制动科技有限公司 | Expanding tube type automatic gap-adjusting piston mechanism |
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2020
- 2020-04-22 CN CN202020622691.XU patent/CN212804016U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944708A (en) * | 2021-10-17 | 2022-01-18 | 西安航空制动科技有限公司 | Expanding tube type automatic gap-adjusting piston mechanism |
| CN113944708B (en) * | 2021-10-17 | 2023-08-18 | 西安航空制动科技有限公司 | Automatic gap adjusting piston mechanism of expansion pipe type |
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