CN109058327B - Brake half shaft device for engineering machinery drive axle - Google Patents
Brake half shaft device for engineering machinery drive axle Download PDFInfo
- Publication number
- CN109058327B CN109058327B CN201811169881.4A CN201811169881A CN109058327B CN 109058327 B CN109058327 B CN 109058327B CN 201811169881 A CN201811169881 A CN 201811169881A CN 109058327 B CN109058327 B CN 109058327B
- Authority
- CN
- China
- Prior art keywords
- ring
- piston
- brake
- half shaft
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 33
- 238000010276 construction Methods 0.000 claims description 14
- 238000004146 energy storage Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 2
- 210000001503 joint Anatomy 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 19
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000037237 body shape Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/08—Seals, e.g. piston seals
Abstract
The utility model provides a braking semi-axis device for engineering machine tool transaxle, include the braking semi-axis device body that has piston (6), set up on one of them side of piston (6) and be used for piston (6) to produce spring (9) of braking force, set up on one of them another side of piston (6) and be used for constituteing solid fixed ring (8) of hydraulic seal cavity with piston (6), through spring (9), produce normal closed braking effort to piston (6), through solid fixed ring (8) and the hydraulic seal cavity of piston (6) constitution, produce compression effort to spring (9), produce the effort of releasing the braking to piston (6), consequently realized the emergency braking to the transaxle, the security performance of engineering machine tool transaxle has been improved.
Description
Technical Field
The invention relates to a brake half shaft device, in particular to a brake half shaft device for a driving axle of engineering machinery.
Background
The brake half shaft is a component part of the engineering mechanical drive axle, and the brake of the drive axle is realized through the brake half shaft, so that the brake half shaft device for the engineering mechanical drive axle is an important engineering part, and in the existing brake half shaft device for the engineering mechanical drive axle, the brake form of the engineering mechanical vehicle is mainly as follows: firstly, a drum brake, hydraulic or pneumatic braking and spring return; secondly, a caliper disc brake, hydraulic braking and elastic return of a rectangular sealing ring; and thirdly, the normally open wet brake, the hydraulic brake and the spring return, and the high-pressure liquid is required to be converted into braking acting force, so that emergency braking and stopping can not be realized when the pump body generating the high-pressure liquid stops working due to flameout or faults of the engine, and the safety performance of the engineering mechanical drive axle is influenced.
Meanwhile, in the existing normally closed wet brake, a manual pump is adopted for emergency release, and the piston compression spring is pushed by pressure oil to release the brake, but when the piston sealing element of the brake is damaged, the manual pump is not used.
Based on the technical problem, technical characteristics and technical effects existing in technical base books of the applicant at the date of 2018, 9 and 3 and the background technology, the technical scheme of the invention is made.
Disclosure of Invention
The invention discloses a brake half shaft device for a driving axle of engineering machinery.
In order to overcome the technical defects, the invention aims to provide a brake half shaft device for a driving axle of engineering machinery, so that the emergency braking of the driving axle is realized, and the safety performance of the driving axle of the engineering machinery is improved.
In order to achieve the above purpose, the invention adopts the following technical scheme: the brake half shaft device comprises a brake half shaft device body with a piston, a spring which is arranged on one side surface part of the piston and used for generating braking force by the piston, and a fixing ring which is arranged on the other side surface part of the piston and used for forming a hydraulic sealing cavity with the piston.
Because the spring, the fixed ring and the braking half shaft device body are designed, normal closed braking acting force is generated on the piston through the spring, compression acting force is generated on the spring through the hydraulic sealing cavity formed by the fixed ring and the piston, braking releasing acting force is generated on the piston, emergency braking on the driving axle is realized, and the safety performance of the engineering mechanical driving axle is improved.
The invention designs a method for mutually connecting a spring, a fixed ring and a brake half shaft device body in a mode of forming a single hydraulic cavity.
The invention designs a method for connecting a fixed ring with a spring and a brake half shaft device body in a mode of overcoming the hydraulic pushing force of spring energy storage.
The invention designs that the braking half shaft device body is arranged to further comprise a friction plate, a braking plate, a meshing sleeve and a half shaft.
The invention is designed to further comprise a first attachment means arranged to be coupled to the securing ring, the first attachment means being arranged as a retainer ring.
The invention is designed to further comprise a second attachment means arranged to be coupled to the spring, the second attachment means being arranged as a guide shaft.
The invention is designed to further comprise a third accessory device arranged to be coupled to the piston, the third accessory device being arranged as a knock pin.
The invention also comprises a fourth accessory device which is respectively connected with the piston and the fixed ring, and the fourth accessory device is a sealing ring.
The invention designs that a half shaft is arranged in a shell and an axle housing, a meshing sleeve is arranged on the half shaft, a brake block is arranged on the axle housing, a friction plate is arranged on the meshing sleeve, the friction plate and the brake block are arranged in a staggered arrangement at intervals, a piston and a spring are respectively arranged between the brake block and the shell, the spring is arranged on a guide shaft, the guide shaft is arranged on the shell, a retainer ring and a fixed ring are arranged on the piston, the retainer ring is arranged on the shell, an oil inlet port is arranged on the shell, the oil inlet port is arranged between the fixed ring and the piston, a top pin is arranged on the shell and is connected with the piston in a contact mode, and sealing rings are respectively arranged between the piston and the shell, between the fixed ring and the shell, and between the fixed ring and the piston.
According to the invention, one end of the half shaft is arranged to extend into the axle housing, the other end of the half shaft is arranged to be connected with the housing through the bearing, the middle step part of the half shaft is arranged to be connected with the meshing sleeve, and the half shaft is arranged to be connected with the piston in series.
The invention designs that the friction plate and the brake plate are respectively arranged as annular plate-shaped bodies and the meshing sleeve is arranged as a tubular body, the brake plate is connected with the inner wall of the shell through a spline and the friction plate is connected with the meshing sleeve through a spline, one brake plate at the left end is connected with the axle housing in a contact mode, the other brake plate at the left end is connected with the piston in a contact mode, and the brake plate at the middle part is connected with the friction plate in a dual mode.
The invention designs that the piston is provided with a plate part, a left ring part, a right inner ring part and a right outer ring part, wherein the left ring part is arranged on the left side surface part of the plate part, the right inner ring part is arranged on the outer side surface part of the plate part, the right outer ring part is arranged on the outer side surface part of the right inner ring part, the right inner ring part and the right outer ring part are distributed in an L shape, and are provided with serial connection hole bodies in the plate part, an opening body is arranged on the left ring part, a containing groove body is arranged on the outer side surface part of the right outer ring part, the outer end face part of the left ring part is connected with a brake disc in a contact way, and is connected with a half shaft in a serial way, the right inner ring part is connected with a retainer ring and a fixed ring in a serial connection way, and is arranged in a corresponding distribution way to the right outer ring part, the containing groove body is connected with a sealing ring, an oil inlet port is arranged between the right outer ring part and the fixed ring part, the plate part is arranged in a circular sheet shape, the left ring part, the right inner ring part and the right outer ring part are respectively arranged in a circular tubular shape, the hole body is arranged in a circular shape, the opening body is arranged in a staggered way, and the bottom end face body is arranged in a staggered way, and the opening body is arranged in a U shape is arranged in a staggered way, and the opening body is arranged in a groove body shape is arranged in a shape.
The invention provides that one end of the spring is connected with the piston in a contact way and the other end of the spring is connected with the shell in a contact way, and the spring is connected with the guide shaft in series.
The invention designs that the guide shaft is a round rod-shaped body, one end of the guide shaft is connected with the shell in an embedded mode, and the guide shaft is connected with the spring in series.
The invention designs that the fixed ring is arranged as a ring-shaped body, the inner wall and the outer wall of the fixed ring are provided with annular groove bodies, the left end face part of the fixed ring is arranged to be in contact connection with the check ring, the right end face part of the fixed ring is arranged to be in interval connection with the piston, the outer side face part of the fixed ring is arranged to be in contact connection with the shell, the inner side face part of the fixed ring is arranged to be in contact connection with the piston, and the annular groove bodies of the fixed ring are arranged to be in contact connection with the sealing ring.
The invention designs that the check ring is arranged as a circular ring body and is connected with the shell in an embedded mode, and the end face of the right end of the check ring is connected with the fixed ring in a contact mode.
The invention designs that the sealing ring is arranged as an O-shaped sealing ring body.
The invention designs that the oil inlet port is arranged as a circular hole-shaped body and is connected with the output port of the high-pressure liquid pump.
The invention designs that the ejector pin is arranged as an optical head screw rod, the inner end head of the ejector pin is arranged as a conical body, the ejector pin is arranged in threaded connection with the shell, and the inner end head of the ejector pin is arranged in contact connection with the piston.
The invention designs that the friction plate, the brake block, the meshing sleeve, the half shaft, the piston, the fixed ring and the spring are distributed according to a mode of braking by a single hydraulic cavity, the friction plate, the brake block, the meshing sleeve, the half shaft, the piston, the fixed ring, the spring and the ejector pins are distributed in a jacking movement mode, the spring and the guide shaft are distributed according to a mode of middle support, one spring and one guide shaft are arranged to form a group of elastic energy storage components, at least three elastic energy storage components are arranged to be distributed at intervals along the periphery of the piston, at least three ejector pins are arranged to be distributed at intervals along the periphery of the shell, and the center line of the friction plate, the center line of the brake block, the center line of the piston, the center line of the retainer ring, the center line of the seal ring, the center line of the meshing sleeve and the center line of the half shaft are arranged on the same straight line.
The invention has the technical effects that: the wet normally closed multi-disc brake with the emergency release mechanism comprises a brake assembly consisting of a shell, a piston, a rectangular compression spring, a brake plate, a friction plate, a top pin and a meshing sleeve, wherein the piston is arranged in the shell and forms a hydraulic cavity with the shell through a sealing piece; the rectangular compression springs are arranged in a cavity formed between the shell and the piston and are uniformly distributed in the circumferential direction through a guide shaft fixed on the shell; the brake block is fixed in the shell through a spline; the friction plate is connected with the half shaft through a meshing sleeve and assembled with the brake plate in a pair mode; the top pin head is semicircular sphere and distributed on the outer circumference of the shell, is connected with the shell through threads and corresponds to three wedge surfaces on the piston respectively, not only can the requirement of service braking be met, but also the requirement of parking braking can be met under the condition that a hand braking device is not required to be additionally added, emergency braking can be automatically realized under the condition that a vehicle breaks down, the safety and reliability of the whole machine are greatly improved, and the provided brake emergency release mechanism can release braking to realize the walking problem of the trailer of the whole machine when a hydraulic system breaks down.
In the technical scheme, the spring, the fixed ring and the brake half shaft device body which form a single hydraulic cavity are important technical characteristics, and the brake half shaft device has novelty, creativity and practicability in the technical field of the brake half shaft device for the engineering mechanical drive axle, and the terms in the technical scheme can be explained and understood by the patent literature in the technical field.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Figure 1 is a schematic view of the present invention,
figure 2 is a schematic view of the structure of the piston 6,
the device comprises a top pin (2), a friction plate (3), a brake plate (4), a piston (6), a retainer ring (7), a fixed ring (8), a spring (9), a sealing ring (10), a guide shaft (11), a meshing sleeve (12), a half shaft (13), a shell (1), an axle housing (5), an oil inlet port (14),
The plate part-61, the left ring part-62, the right inner ring part-63, the right outer ring part-64, the serial hole body-65, the opening body-66 and the containing groove body-67.
Detailed Description
Terms such as "having," "including," and "comprising," as used herein, are to be construed as not being accompanied by the presence or addition of one or more other elements or combinations thereof, in accordance with the censoring guidelines.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 shows a first embodiment of the invention, which is specifically described with reference to the accompanying drawings and comprises a top pin 2, a friction plate 3, a brake plate 4, a piston 6, a retainer ring 7, a fixed ring 8, a spring 9, a sealing ring 10, a guide shaft 11, an engagement sleeve 12 and a half shaft 13,
half shafts 13 are provided in the housing 1 and the axle housing 5 and a meshing sleeve 12 is provided on the half shafts 13, brake pads 4 are provided on the axle housing 5 and friction pads 3 are provided on the meshing sleeve 12, the friction pads 3 and the brake pads 4 are provided in a staggered arrangement at intervals and the pistons 6 are provided on the half shafts 13, pistons 6 and springs 9 are provided between the brake pads 4 and the housing 1, respectively, and springs 9 are provided on guide shafts 11, the guide shafts 11 are provided on the housing 1, retainer rings 7 and retainer rings 8 are provided on the pistons 6 and retainer rings 7 are provided on the housing 1, oil inlet ports 14 are provided on the housing 1 and oil inlet ports 14 are provided to be distributed between the retainer rings 8 and the pistons 6, the knock pins 2 are provided on the housing 1 and the knock pins 2 are provided to be in contact with the pistons 6, and seal rings 10 are provided between the pistons 6 and the housing 1, between the retainer rings 8 and the housing 1, and between the retainer rings 8 and the pistons 6, respectively.
In the present embodiment, one of the ends of the half shaft 13 is provided to extend in the axle housing 5 and the other of the ends of the half shaft 13 is provided to be coupled to the housing 1 through a bearing, the intermediate step of the half shaft 13 is provided to be coupled to the engagement sleeve 12 and the half shaft 13 is provided to be coupled in series with the piston 6.
Through semi-axis 13, formed to piston 6 and meshing cover 12 support tie point, realized being connected with meshing cover 12 by semi-axis 13, realized being connected with piston 6, its aim at: for transmitting braking forces to the drive axle.
In the present embodiment, the friction plates 3 and the brake plates 4 are respectively provided as annular plate-like bodies and the engagement sleeve 12 is provided as a tubular body, the brake plates 4 are provided to be coupled with the inner wall of the housing 1 by splines and the friction plates 3 are provided to be coupled with the engagement sleeve 12 by splines, one of the brake plates 4 at the left end is provided to be coupled in contact with the axle housing 5 and the other brake plate 4 at the left end is provided to be coupled in contact with the piston 6, and the brake plate 4 at the intermediate portion is provided to be coupled in pair with the friction plates 3.
Through friction disc 3, brake block 4 and adapter sleeve 12, formed the tie point of supporting piston 6 and semi-axis 13, realized being connected with semi-axis 13 by friction disc 3 and adapter sleeve 12, realized being connected with piston 6 by brake block 4, its aim at: for generating braking force to the half shafts 13.
In this embodiment, the piston 6 is configured to include a plate portion 61, a left ring portion 62, a right inner ring portion 63 and a right outer ring portion 64, and the left ring portion 62 is disposed at a left side surface portion of the plate portion 61, the right inner ring portion 63 is disposed at an outer side surface portion of the plate portion 61, and the right outer ring portion 64 is disposed at an outer side surface portion of the right inner ring portion 63, the right inner ring portion 63 and the right outer ring portion 64 are distributed in an L-shape and are provided with a series connection hole body 65 in the plate portion 61, an opening body 66 is disposed on the left ring portion 62, and a containing groove body 67 is disposed at an outer side surface portion of the right outer ring portion 64, an outer end face portion of the left ring portion 62 is configured to be in contact connection with the brake pad 4 and is configured to be in connection with the half shaft 13, the right inner ring portion 63 is configured to be in series connection with the retainer ring 7 and the retainer ring 8 and is configured to be distributed corresponding to the right outer ring portion 64, the containing groove body 67 is configured to be in connection with the seal ring 10, and the right side surface portion of the plate portion 61 is configured to be in contact connection with the spring 9, an oil inlet port body 14 is disposed between the right ring portion 64 and the retainer ring 8, the opening body 64 is configured to be in a circular shape, and the opening body 66 is configured to be in a circular shape, and the opening body is configured to be in a circular shape, and the opening body 66 is configured to be in a top opening is configured to be in a circular shape, and a top opening is configured to be in a top-shaped.
Through piston 6, formed to knock pin 2, brake block 4, retaining ring 7, solid fixed ring 8, spring 9, sealing washer 10 and semi-axis 13 support tie point, by opening body 66, realized being connected with knock pin 2, by left circle portion 62, realized being connected with brake block 4, by right inner circle portion 63, realized being connected with retaining ring 7, realized being connected with solid fixed ring 8, by plate portion 61, realized being connected with spring 9, by right outer circle portion 64 and containing groove body 67, realized being connected with sealing washer 10, by concatenate hole body 65, realized being connected with semi-axis 13, its aim at: the fixing ring 8 and the right outer ring portion 64 constitute a hydraulic chamber for generating an urging force to the brake pad 4.
In the present embodiment, one of the ends of the spring 9 is provided in contact with the piston 6 and the other end of the spring 9 is provided in contact with the housing 1, and the spring 9 is provided in series with the guide shaft 11.
Through spring 9, formed to piston 6 and guiding axle 11 support tie point, realized being connected with piston 6 by spring 9, realized being connected with guiding axle 11, its aim at: for generating a normally closed braking force to the brake pad 4.
In the present embodiment, the guide shaft 11 is provided as a circular rod-shaped body and one of the ends of the guide shaft 11 is provided as an insert-type coupling with the housing 1, and the guide shaft 11 is provided as a tandem coupling with the spring 9.
Through guiding axle 11, formed the tie point to spring 9 support, realized being connected with spring 9 by guiding axle 11, its aim at: for the carrier of the springs 9.
In the present embodiment, the fixing ring 8 is provided as a ring-shaped body and annular groove bodies are provided at the inner and outer walls of the fixing ring 8, the left end face portion of the fixing ring 8 is provided to be coupled in contact with the retainer ring 7 and the right end face portion of the fixing ring 8 is provided to be coupled with the piston 6 at a spacing, the outer side face portion of the fixing ring 8 is provided to be coupled in contact with the housing 1 and the inner side face portion of the fixing ring 8 is provided to be coupled in contact with the piston 6, and the annular groove body of the fixing ring 8 is provided to be coupled with the seal ring 10.
Through solid fixed ring 8, formed to piston 6, retaining ring 7 and sealing washer 10 support tie point, realized being connected with piston 6 by solid fixed ring 8, realized being connected with retaining ring 7, realized being connected with sealing washer 10, its aim at: for forming a hydraulic chamber with the piston 6 and the housing 1.
In the present embodiment, the retainer ring 7 is provided as a circular annular body and the retainer ring 7 is provided as an insert coupling with the housing 1, and the right end face portion of the retainer ring 7 is provided as a contact coupling with the fixing ring 8.
Through retaining ring 7, formed the tie point to solid fixed ring 8 support, by retaining ring 7, realized being connected with solid fixed ring 8, its aim at: for fixing and limiting the fixing ring 8.
In this embodiment, the seal ring 10 is provided as an O-ring body.
Through sealing washer 10, formed the tie point to piston 6 and solid fixed ring 8 support, realized being connected with piston 6 by sealing washer 10, realized being connected with solid fixed ring 8, its aim at: for sealing between the housing 1, the piston 6 and the fixing ring 8.
In the present embodiment, the oil inlet port 14 is provided as a circular hole-like body and the oil inlet port 14 is provided to be coupled with the output port of the high-pressure liquid pump.
By the oil inlet port 14, realized being connected with piston 6, realized being connected with solid fixed ring 8, its aim at: for injecting a high-pressure liquid between the piston 6 and the stationary ring 8.
In the present embodiment, the knock pin 2 is provided as an optical head screw and the inner end of the knock pin 2 is provided as a cone, the knock pin 2 is provided in threaded engagement with the housing 1 and the inner end of the knock pin 2 is provided in contact engagement with the piston 6.
Through knock pin 2, formed the tie point to the piston 6 support, realized by knock pin 2 with piston 6 connection, its aim at: for generating a compressive force on the spring 9.
In the present embodiment, the friction plate 3, the brake plate 4, the engagement sleeve 12 and the half shaft 13 are arranged to be distributed in a single hydraulic chamber braking manner with the piston 6, the fixed ring 8 and the spring 9, and the friction plate 3, the brake plate 4, the engagement sleeve 12, the half shaft 13, the piston 6, the fixed ring 8 and the spring 9 are arranged to be distributed in a jacking movement manner with the jack pins 2, the spring 9 and the guide shaft 11 are arranged to be distributed in an intermediate support manner and one spring 9 and one guide shaft 11 are arranged to constitute a set of elastic energy storage members, at least three elastic energy storage members are arranged to be arranged at intervals along the periphery of the piston 6, at least three jack pins 2 are arranged to be arranged at intervals along the periphery of the housing 1 and the center line of the friction plate 3, the center line of the brake plate 4, the center line of the piston 6, the center line of the retainer ring 7, the center line of the fixed ring 8, the center line of the seal ring 10, the center line of the engagement sleeve 12 and the center line of the half shaft 13 are arranged on the same straight line.
Before the engineering mechanical drive axle is started, the spring 9 is in an elongation state, the spring 9 generates an impetus to the plate part 61, the left ring part 62 moves leftwards, the brake piece 4 generates impetus, the brake piece 4 is kneaded with the friction piece 3, the brake piece 4 generates braking force to the friction piece 3, the half axle 13 is in a limiting state, the engineering mechanical drive axle is in a braking state, after the engineering mechanical drive axle is started, the high-pressure liquid pump of the engineering machinery outputs high-pressure liquid, the high-pressure liquid is injected into a hydraulic cavity formed by the shell 1, the right inner ring part 63, the right outer ring part 64 and the fixed ring 8 through the oil inlet port 14, the high-pressure liquid generates a rightward moving acting force to the right outer ring part 64, the plate part 61 moves rightwards, the plate part 61 compresses the spring 9 against spring energy storage, the plate part 61 is separated from the brake piece 4, the brake piece 4 is separated, the friction piece 3 and the half axle 13 are in a free state, the engineering mechanical drive axle is in a braking state, when the engine fails and can not be started or a braking hydraulic system fails, the driving axle is in a braking state, the vehicle needs to be braked first, three jack pins 2 are evenly screwed respectively, the jack pins 6 are separated from the piston part 6, the opening part 6 is separated from the piston part 6 from the brake piece 4, the piston part is separated from the brake piece 4, and the head part is separated from the brake piece 4, and the brake piece 4 is separated from the brake piece 4 from the piston part 4.
In a second embodiment of the invention, the spring 9, the retaining ring 8 and the brake half shaft device body are coupled to each other in such a way that a single hydraulic chamber is formed.
In this embodiment, the retaining ring 8 is coupled to the spring 9 and the brake half shaft assembly body in a manner that overcomes the hydraulic thrust force of the spring charge.
In this embodiment, the brake half shaft device body is configured to further include a friction plate 3, a brake plate 4, a meshing sleeve 12, and a half shaft 13.
In this embodiment, a first attachment means is also included and is arranged to be coupled with the securing ring 8, the first attachment means being arranged as a collar 7.
In this embodiment, a second attachment means is also included and is arranged to be coupled with the spring 9, the second attachment means being arranged as a guide shaft 11.
In the present embodiment, a third accessory device is also included and is provided to be coupled with the piston 6, the third accessory device being provided as the knock pin 2.
In the present embodiment, fourth accessory means are also included and are provided in connection with the piston 6 and the stationary ring 8, respectively, the fourth accessory means being provided as a sealing ring 10.
The second embodiment of the present invention is based on the first embodiment.
When the invention is verified, an annular single cavity is formed under the integration of the piston 6, the retainer ring 7 and the fixed ring 8, the capacity for containing high-pressure liquid is reduced, the sensitivity to the action of the piston 6 is improved, an elastic energy storage component in a compressed state is formed under the integration of the spring 9 and the guide shaft 11, the braking of the friction plate 3 and the brake plate 4 in a normal state is kept, the safety performance of the drive axle is higher under the action of the annular single cavity and the elastic energy storage component in the compressed state, the influence of the loss facing braking performance between the friction plate 3 and the brake plate 4 is eliminated under the integration of the ejector pin 2, and the reliability performance of the drive axle is higher.
The invention has the following characteristics:
1. due to the design of the spring 9, the fixed ring 8 and the brake half shaft device body, normal-closed braking acting force is generated on the piston 6 through the spring 9, compression acting force is generated on the spring 9 through a hydraulic sealing cavity formed by the fixed ring 8 and the piston 6, braking releasing acting force is generated on the piston 6, emergency braking on a driving axle is realized, and safety performance of the engineering mechanical driving axle is improved.
2. Due to the design of the friction plate 3, the brake plate 4, the meshing sleeve 12 and the half shaft 13, a normally closed brake component is formed, and the half shaft 13 is braked.
3. Due to the design of the retainer ring 7, a limit supporting component is formed, and the connection of the fixed ring 8 is realized.
4. Owing to the design of the guide shaft 11, a support element is formed, a carrier connection to the spring 9 being achieved.
5. Due to the design of the ejector pin 2, a pushing member is formed, which realizes a pushing displacement of the piston 6.
6. Due to the design of the sealing ring 10, a sealing member is formed, sealing between the piston 6 and the fixing ring 8 and the housing 1 is achieved.
7. Because the technical characteristics of the invention are designed, the experiment shows that the performance indexes of the invention are at least 1.7 times of the existing performance indexes under the independent and mutually aggregated functions of the technical characteristics, and the invention has good market value through evaluation.
Still other technical features of the coupling with the spring 9, the fixing ring 8 and the brake half shaft device body forming a single hydraulic chamber are one of the embodiments of the present invention, and the technical features of the above-described embodiments may be arbitrarily combined, and embodiments of all possible combinations of the technical features of the above-described embodiments will not be described in order to satisfy the requirements of patent laws, patent implementation details and examination guidelines.
In the technical field of brake axle shafts for drive axles of construction machines, therefore, all the technical contents of a brake axle shaft device body comprising a piston 6, a spring 9 arranged on one of the side faces of the piston 6 and used for generating a braking force by the piston 6, and a fastening ring 8 arranged on the other of the side faces of the piston 6 and used for forming a hydraulic sealing chamber with the piston 6 are within the scope of the invention.
Claims (14)
1. A brake semi-axis device for engineering machine tool transaxle, characterized by: comprising a brake half shaft device body with a piston (6), a spring (9) which is arranged on one side surface part of the piston (6) and is used for generating braking force by the piston (6), and a fixed ring (8) which is arranged on the other side surface part of the piston (6) and is used for forming a hydraulic sealing cavity with the piston (6),
the braking half shaft device body is arranged to further comprise a friction plate (3), a braking plate (4), a meshing sleeve (12) and a half shaft (13),
a first attachment means is also included and is arranged to be coupled with the securing ring (8), the first attachment means being arranged as a collar (7),
a second attachment means is also included and is arranged to be coupled to the spring (9), the second attachment means being arranged as a guide shaft (11),
a third accessory device is also included and is arranged to be coupled with the piston (6), the third accessory device is arranged as a knock pin (2),
a fourth accessory device is also included and is respectively arranged to be connected with the piston (6) and the fixed ring (8), the fourth accessory device is arranged as a sealing ring (10),
half shaft (13) is arranged in shell (1) and axle housing (5) and engaging sleeve (12) is arranged on half shaft (13), brake disc (4) is arranged on axle housing (5) and friction disc (3) is arranged on engaging sleeve (12), friction disc (3) and brake disc (4) are arranged to be distributed in interval staggered arrangement and piston (6) is arranged on half shaft (13), piston (6) and spring (9) are respectively arranged between brake disc (4) and shell (1) and spring (9) is arranged on guide shaft (11), guide shaft (11) is arranged on shell (1), retainer ring (7) and retainer ring (8) are arranged on piston (6) and retainer ring (7) is arranged on shell (1), oil inlet port (14) is arranged on shell (1) and oil inlet port (14) is arranged between distribution retainer ring (8) and piston (6), top pin (2) is arranged on shell (1) and top pin (2) is arranged to be contacted with piston (6) and is connected between piston (6) and shell (1), sealing rings (10) are respectively arranged between the fixing ring (8) and the shell (1) and between the fixing ring (8) and the piston (6).
2. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the spring (9), the fixing ring (8) and the brake half shaft device body are mutually connected in a mode of forming a single hydraulic cavity.
3. The brake half shaft device for a drive axle of a construction machine according to claim 2, wherein: the fixed ring (8) is connected with the spring (9) and the braking half shaft device body in a mode of overcoming the hydraulic pushing force of spring energy storage.
4. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the fixed ring (8) is arranged into a ring shape, an annular groove body is arranged on the inner wall and the outer wall of the fixed ring (8), the left end face part of the fixed ring (8) is in contact connection with the check ring (7), the right end face part of the fixed ring (8) is in interval connection with the piston (6), the outer side part of the fixed ring (8) is in contact connection with the shell (1), the inner side part of the fixed ring (8) is in contact connection with the piston (6), and the annular groove body of the fixed ring (8) is in contact connection with the sealing ring (10).
5. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: one end of the spring (9) is arranged to be in contact with the piston (6) and the other end of the spring (9) is arranged to be in contact with the housing (1), the spring (9) being arranged to be in series with the guide shaft (11).
6. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: one end of the half shaft (13) is arranged to extend in the axle housing (5) and the other end of the half shaft (13) is arranged to be coupled with the housing (1) through a bearing, the middle step of the half shaft (13) is arranged to be coupled with the engagement sleeve (12) and the half shaft (13) is arranged to be coupled in series with the piston (6).
7. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the friction plate (3) and the brake plate (4) are respectively arranged as annular plate-shaped bodies, the meshing sleeve (12) is arranged as a tubular body, the brake plate (4) is connected with the inner wall of the shell (1) through a spline, the friction plate (3) is connected with the meshing sleeve (12) through a spline, one brake plate (4) at the left end is connected with the axle housing (5) in a contact mode, the other brake plate (4) at the left end is connected with the piston (6) in a contact mode, and the brake plate (4) at the middle part is connected with the friction plate (3) in a butt joint mode.
8. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the piston (6) is provided with a plate part (61), a left ring part (62), a right inner ring part (63) and a right outer ring part (64), the left ring part (62) is arranged on the left side surface part of the plate part (61), the right inner ring part (63) is arranged on the outer side surface part of the plate part (61), the right outer ring part (64) is arranged on the outer side surface part of the right inner ring part (63), the right inner ring part (63) and the right outer ring part (64) are distributed in an L shape, a series connection hole body (65) is arranged in the plate part (61), an opening body (66) is arranged on the left ring part (62), a containing groove body (67) is arranged on the outer side surface part of the right outer ring part (64), the outer end surface part of the left ring part (62) is arranged to be connected with a brake disc (4) in a contact mode, the series connection hole body (65) is arranged to be connected with a half shaft (13), the right inner ring part (63) is arranged to be connected with a retainer ring (7) and a fixed ring (8) in series mode, the fixed ring (8) is arranged to be connected with the right ring part (64) correspondingly, a containing groove body (67) is arranged between the right ring part (64) and a fixed ring (10) is arranged on the outer ring part (14) in a contact mode, an oil inlet port (9) is arranged between the connecting port (10), the plate part (61) is a circular sheet-shaped body, the left ring part (62), the right inner ring part (63) and the right outer ring part (64) are respectively arranged into circular tubular bodies, the serial hole body (65) is arranged into a circular hole body, the containing groove body (67) is arranged into an annular groove body, the opening body (66) is arranged into a U-shaped opening body, the bottom end face part of the opening body (66) is arranged into a wedge-shaped surface, and the opening body (66) is arranged to be distributed in a dislocation mode with the ejector pin (2).
9. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the guide shaft (11) is a round rod-shaped body, one end of the guide shaft (11) is connected with the shell (1) in an embedded mode, and the guide shaft (11) is connected with the spring (9) in series.
10. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the retainer ring (7) is a circular ring body, the retainer ring (7) is connected with the shell (1) in an embedded mode, and the right end face of the retainer ring (7) is connected with the fixed ring (8) in a contact mode.
11. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the sealing ring (10) is arranged as an O-shaped sealing ring body.
12. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the oil inlet port (14) is provided as a circular hole-like body and the oil inlet port (14) is provided to be coupled with an output port of the high-pressure liquid pump.
13. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: the ejector pin (2) is arranged as an optical head screw rod, the inner end head of the ejector pin (2) is arranged as a conical body, the ejector pin (2) is arranged in threaded connection with the shell (1), and the inner end head of the ejector pin (2) is arranged in contact connection with the piston (6).
14. The brake half shaft device for a drive axle of a construction machine according to claim 1, wherein: friction disc (3), brake disc (4), adapter sleeve (12) and semi-axis (13) and piston (6), solid fixed ring (8) and spring (9) set up to be distributed according to the mode of single hydraulic pressure cavity braking and friction disc (3), brake disc (4), adapter sleeve (12), semi-axis (13), piston (6), gu fixed ring (8) and spring (9) set up to jack-in removal mode and distribute, spring (9) set up to be distributed according to the mode of intermediate strut with guiding axle (11), and a spring (9) and a guiding axle (11) set up to constitute a set of elastic energy storage part, at least three elastic energy storage part sets up to be arranged along the peripheral interval of piston (6) and distributes, at least three jack-pin (2) set up to be arranged along the peripheral interval of casing (1) and the central line of friction disc (3), the central line of brake disc (4), the central line of piston (6), the central line of retaining ring (7), the central line of gu fixed ring (8), the central line of sealing washer (10), the central line of adapter sleeve (12) and central line setting on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169881.4A CN109058327B (en) | 2018-10-08 | 2018-10-08 | Brake half shaft device for engineering machinery drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169881.4A CN109058327B (en) | 2018-10-08 | 2018-10-08 | Brake half shaft device for engineering machinery drive axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058327A CN109058327A (en) | 2018-12-21 |
| CN109058327B true CN109058327B (en) | 2024-01-26 |
Family
ID=64767406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811169881.4A Active CN109058327B (en) | 2018-10-08 | 2018-10-08 | Brake half shaft device for engineering machinery drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058327B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361598B (en) * | 2020-03-16 | 2021-01-22 | 李富盈 | Wet brake for urban rail vehicle |
| CN113531011B (en) * | 2021-09-17 | 2021-12-07 | 中车戚墅堰机车车辆工艺研究所有限公司 | Parking brake with braking force automatic compensation function |
| CN116025706B (en) * | 2022-12-12 | 2024-02-27 | 荣成市兴银机械工程有限公司 | Vehicle emergency braking parking brake and braking method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101175930A (en) * | 2004-10-13 | 2008-05-07 | 克诺尔商用车制动系统有限公司 | Self-energising disk brake and control method for a self-energising brake |
| CN201062643Y (en) * | 2007-07-31 | 2008-05-21 | 徐州美驰车桥有限公司 | Wet-type multi-disc brake for loader drive axle |
| CN201461796U (en) * | 2009-08-27 | 2010-05-12 | 三一重机有限公司 | Complete disc brake |
| CN102774367A (en) * | 2012-07-31 | 2012-11-14 | 肥城众力机械有限公司 | Wet type braking device for driving axle |
| CN202753929U (en) * | 2012-07-31 | 2013-02-27 | 肥城众力机械有限公司 | Wet braking device for driving axle |
| CN203082077U (en) * | 2013-01-05 | 2013-07-24 | 中国一拖集团有限公司 | Built-in tension spring wet-type hydraulic arrester brake for vehicle driving axle |
| CN104019158A (en) * | 2014-05-22 | 2014-09-03 | 厦门厦金机械股份有限公司 | Normally closed type brake for hydraulic wet-type drive axle |
| CN104675889A (en) * | 2014-12-19 | 2015-06-03 | 徐州徐工传动科技有限公司 | Braking structure of engineering machinery drive axle |
| CN106969067A (en) * | 2017-04-20 | 2017-07-21 | 武汉理工大学 | It is low to drag automotive disc floating brake device and its braking method |
| CN208966919U (en) * | 2018-10-08 | 2019-06-11 | 山东云宇机械集团有限公司 | Braking semi-shaft equipment for driving bridge for engineering machinery |
-
2018
- 2018-10-08 CN CN201811169881.4A patent/CN109058327B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101175930A (en) * | 2004-10-13 | 2008-05-07 | 克诺尔商用车制动系统有限公司 | Self-energising disk brake and control method for a self-energising brake |
| CN201062643Y (en) * | 2007-07-31 | 2008-05-21 | 徐州美驰车桥有限公司 | Wet-type multi-disc brake for loader drive axle |
| CN201461796U (en) * | 2009-08-27 | 2010-05-12 | 三一重机有限公司 | Complete disc brake |
| CN102774367A (en) * | 2012-07-31 | 2012-11-14 | 肥城众力机械有限公司 | Wet type braking device for driving axle |
| CN202753929U (en) * | 2012-07-31 | 2013-02-27 | 肥城众力机械有限公司 | Wet braking device for driving axle |
| CN203082077U (en) * | 2013-01-05 | 2013-07-24 | 中国一拖集团有限公司 | Built-in tension spring wet-type hydraulic arrester brake for vehicle driving axle |
| CN104019158A (en) * | 2014-05-22 | 2014-09-03 | 厦门厦金机械股份有限公司 | Normally closed type brake for hydraulic wet-type drive axle |
| CN104675889A (en) * | 2014-12-19 | 2015-06-03 | 徐州徐工传动科技有限公司 | Braking structure of engineering machinery drive axle |
| CN106969067A (en) * | 2017-04-20 | 2017-07-21 | 武汉理工大学 | It is low to drag automotive disc floating brake device and its braking method |
| CN208966919U (en) * | 2018-10-08 | 2019-06-11 | 山东云宇机械集团有限公司 | Braking semi-shaft equipment for driving bridge for engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109058327A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109058327B (en) | Brake half shaft device for engineering machinery drive axle | |
| CN107265354B (en) | Integrated wet braking drive axle for forklift traveling and parking | |
| CN110697089A (en) | Combined type bears non-firer greatly and connects separator | |
| CN106523550B (en) | Automobile-used gap adjustable cone shape brake apparatus | |
| CN113483038A (en) | Brake with self-compensation and braking method thereof | |
| CN104989749A (en) | Multi-plate dry brake | |
| CN107859699B (en) | Brake | |
| CN2769602Y (en) | Spring braking disc-shape braker | |
| CN114576289B (en) | Traveling and parking integrated brake | |
| CN101303051A (en) | Locking device for shaft | |
| CN207313042U (en) | A kind of fork truck driving parking integrates wet-type braking driving axle | |
| CN210290547U (en) | Wet-type brake structure of through bridge | |
| CN101659252B (en) | Brake with cooling in driving axle of battery forklift | |
| CN208966919U (en) | Braking semi-shaft equipment for driving bridge for engineering machinery | |
| CN106286648B (en) | Brake for hydrostatic transmissions | |
| CN109538663B (en) | Normally closed wet brake | |
| CN112628313B (en) | Brake | |
| CN211314925U (en) | Transfer case with parking brake device | |
| CN110725873B (en) | Stable wet-type multi-disc brake | |
| CN110345177B (en) | Disc brake and control method | |
| CN214499846U (en) | Brake integrating parking braking and service braking functions | |
| CN220248757U (en) | Parking braking unlocking mechanism of gearbox | |
| CN217633558U (en) | Wet brake with double friction pairs | |
| CN212055587U (en) | Wet type parking brake | |
| CN217496097U (en) | Automatic parking mechanism of scraper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |