CN114992262B - Integrated spring power unit - Google Patents
Integrated spring power unit Download PDFInfo
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- CN114992262B CN114992262B CN202210756095.4A CN202210756095A CN114992262B CN 114992262 B CN114992262 B CN 114992262B CN 202210756095 A CN202210756095 A CN 202210756095A CN 114992262 B CN114992262 B CN 114992262B
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- spline
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 56
- 238000007789 sealing Methods 0.000 description 16
- 239000010720 hydraulic oil Substances 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
-
- 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
- B60T1/065—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 employing disc
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
-
- 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
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/62—Slack adjusters mechanical self-acting in both directions for adjusting excessive and insufficient play
- F16D65/66—Slack adjusters mechanical self-acting in both directions for adjusting excessive and insufficient play with screw-thread and nut
-
- 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
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
-
- 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
- F16D2123/00—Multiple operation forces
-
- 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
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides an integrated spring power unit. A main shaft is arranged in the cylinder body of the oil cylinder, and a tooth slot is arranged on the disk surface of the shaft end of the main shaft; the nut shaft sleeve is in threaded connection with the main shaft, and splines are arranged along the peripheral wall; the spline sleeve is in spline fit with the nut shaft sleeve; the spring is arranged on the periphery of the nut shaft sleeve and positioned in a gap between the spline sleeve and the first stepped structure of the cylinder body; the end fluted disc is matched with the disc surface of the main shaft provided with the tooth grooves; the handle-shaped protruding part of the common piston is inserted into a gap between the spline sleeve and the cylinder body of the oil cylinder and is positioned between the third step structure and the fourth step structure in the cylinder body, the main body part of the common piston is limited at the fourth step structure, and the main body part forms a circumferential mounting groove; the auxiliary piston is arranged in a gap between the common piston handle-shaped protruding part and the end face of the third step structure. The spring power unit has the advantages of compact structure, higher modularization degree, low fault point, higher reliability and longer service life.
Description
Technical Field
The invention relates to the technical field of train braking, in particular to an integrated spring power unit.
Background
The invention relates to the technical field of railway vehicle braking, in particular to an integrated spring power unit for a hydraulic braking clamp of a low-floor tram.
Compared with subways, the modern tram runs on a special track on the ground, has low construction cost and high energy efficiency, and is very suitable for being used as a vehicle between a central urban area and a satellite city. Modern tram adopts low floor structure, need not to set up special platform, and the passenger gets on and off the bus conveniently, but also put forward very high requirement to the installation space of the equipment especially braking system under the car, and modern low floor tram adopts compact structure's hydraulic braking system in order to adapt to harsh installation space requirement generally. The hydraulic brake clamp is a basic brake device of a tramcar hydraulic brake system, the braking of the train is realized by pushing a brake pad to squeeze a brake disc to generate friction force by the brake clamp, the spring power unit is a key component for realizing the function of the hydraulic brake clamp, and the operation reliability is a key of accurate braking of the train hydraulic brake system.
With the increasing development of urban traffic, urban tramcars are rapidly developed due to the characteristics of low cost, light weight, rapidness, low chassis and the like, and are an important component of urban traffic. Because of the characteristics of light weight and low chassis, the tram has low weight and small space requirements on a braking system, and most of tram adopts a hydraulic braking system. The hydraulic brake clamp is used as an important component of the actuating mechanism, the spring power unit of the internal core component of the hydraulic brake clamp is required to have a clearance compensation function under the condition of abrasion of brake pads, and the spring outputs braking force under the emergency power failure state so as to meet the braking condition, so that the completion of the functions becomes particularly critical under the development trend of light weight and modularization.
Disclosure of Invention
The invention aims to solve one of the technical problems and provide an integrated spring power unit for a passive hydraulic brake clamp, which has compact structure and high modularization degree, and has the functions of service braking, emergency braking, clearance compensation, mechanical relief and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An integrated spring power unit comprising:
And (3) an oil cylinder body: forming an oil cylinder cavity, wherein a first step structure, a second step structure, a third step structure and a fourth step structure are sequentially formed at the axial first end of the oil cylinder cavity towards the second end;
A main shaft: the oil cylinder body comprises a main body part and a shaft end part positioned at one end of the main body part, wherein the main body part is columnar and provided with external threads, the shaft end part is disk-shaped, and a tooth slot is arranged along the disk surface of one side of the shaft end part far away from the main body part;
nut shaft sleeve: an internal thread is arranged along the inner wall of the sleeve and is in threaded connection with the main shaft, a peripheral spline is arranged along the peripheral wall and is attached to the inner wall of the cylinder body of the oil cylinder;
And (3) a top plate: the nut shaft sleeve is arranged on one side of the nut shaft sleeve extending out of the cylinder body cavity of the oil cylinder;
spline sleeve: the nut shaft sleeve is sleeved on the outer side of the nut shaft sleeve, and the inner wall of the nut shaft sleeve is provided with an internal spline which is matched with the nut shaft sleeve through a spline; the outer wall of the spline sleeve is provided with a shaft shoulder, and the shaft shoulder is clamped in a second ladder structure of the cylinder body of the oil cylinder;
And (3) spring holding: the spline sleeve is arranged on the outer periphery of the nut shaft sleeve and positioned in an axial gap between the end face of the spline sleeve and the first step structure;
End fluted disc: tooth grooves are arranged along the disk surface of the spindle and are matched with the disk surface of the spindle provided with the tooth grooves;
Rear cover: the second end of the cylinder body of the oil cylinder is provided with a first end;
A common piston: the device comprises a handle-shaped protruding part and a main body part, wherein the main body part has a larger radial width relative to the handle-shaped protruding part; the handle-shaped protruding part is inserted into a gap between the spline sleeve and the cylinder body of the oil cylinder and is positioned between the third step structure and the fourth step structure; the main body part is sleeved outside the main shaft and limited at the fourth step structure, and forms a circumferential mounting groove;
An auxiliary piston; a gap is formed between the handle-shaped bulge of the common piston and the end face of the third step structure, and the auxiliary piston is arranged in the gap;
Disc spring: the device is arranged in the circumferential mounting groove and is limited between the rear cover and the mounting groove, a gap is formed between one side of the mounting groove, which is close to the inner wall of the cylinder body, and the rear cover, and a limiting ring is arranged in the gap;
And (3) a spring: the main body part of the common piston forms a radial protruding structure towards one side of the main shaft, and the spring is sleeved and arranged between the radial protruding structure and a disc-shaped structure at the end part of the main shaft;
a first oil cavity is formed among the oil cylinder body, the common piston and the auxiliary piston and is communicated with a first oil port on the oil cylinder body, and a second oil cavity is formed among the oil cylinder body and the auxiliary piston and is communicated with a second oil port on the oil cylinder body.
In some embodiments of the invention, the device further comprises a retainer, wherein the retainer is annular and sleeved on the main shaft, and balls are arranged between the retainer and the disc-shaped structure at the end part of the main shaft; the spring is located between the cage and the conventional piston.
In some embodiments of the invention, the end face of the disk-shaped structure facing to one side of the retainer is provided with an arc groove, and the balls are arranged in the arc groove.
In some embodiments of the present invention, a circumferential radially protruding ring is formed on a side of the spline sleeve facing the first step structure, and is in contact with an end surface of the first step structure, and the armful spring is located between the radially protruding ring and the main shaft.
In some embodiments of the invention, external threads are provided along the periphery of the end tooth disc, and the common piston body is provided with internal cavity threads which are in fit connection with the end holding disc.
In some embodiments of the invention, the tooth slot of the main shaft disk surface is arranged at the periphery of the disk surface, is adjacent to the tooth slot, and is provided with a peripheral groove towards the position close to the center of the disk surface;
Further comprising a ball bearing disposed within the groove;
The ball bearing is sleeved on the periphery of the end fluted disc, and the positioning ring is arranged between the rear cover and the bearing cover.
In some embodiments of the present invention, the bearing cap has an internal thread, a protruding shaft is axially arranged in the center of the main shaft disk surface, and the protruding shaft has an external thread and is mounted in cooperation with the internal thread of the bearing cap.
In some embodiments of the invention, spline grooves are provided along the circumferential folds of the bearing cap and splines are provided along the inner circumferential wall of the end-toothed disc, the splines being inserted into the spline grooves.
In some embodiments of the invention, the retaining ring is mounted on the outside of the bearing cap and has a hollow shaft bore, the spring power unit further comprising:
Protective cover: is arranged in the shaft hole;
Positioning screw: is inserted through the rear cover and is in threaded connection with the protective cover.
In some embodiments of the invention, a sealing sleeve is arranged between the rear cover and the common piston, and a sealing element is arranged in an inner groove at one side of the sealing sleeve, which faces the common piston;
A dust cover is arranged between the rear cover and the positioning ring.
The invention provides a tight-lock coupler, which has the beneficial effects that:
(1) The spring power unit provided by the invention is a novel integrated spring power unit, and has the advantages of compact structure, higher modularization degree, simple structure, low fault point, higher reliability and longer service life. The integrated spring power unit can be used for a passive hydraulic brake clamp cylinder and can replace an active hydraulic brake clamp function.
(2) When the brake pad or the brake disc is worn, the wear can be automatically compensated, the brake clearance is kept unchanged, and the braking force output is stable.
(3) The manual relief device may provide emergency manual relief when hydraulic oil pressure relief fails.
(4) The clearance adjusting function is that the large-pitch thread pair is used, so that the clearance adjusting amount is larger, and particularly, the clearance adjusting times are smaller under the condition of larger initial installation time clearance, so that the target requirement can be met more quickly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a spring power unit.
Fig. 2 is a schematic diagram of a spring power unit.
Fig. 3 is a schematic view of a first view angle structure of the spindle.
Fig. 4 is a schematic view of the second view angle structure of the spindle.
FIG. 5 is a first view structural schematic diagram of a nut sleeve;
FIG. 6 is a second view structural schematic diagram of a nut bushing;
FIG. 7 is a schematic view of a first view of an end disk;
FIG. 8 is a second view structural schematic diagram of an end tooth disk;
FIG. 9 is a schematic view of a bearing cap from a first perspective;
FIG. 10 is a schematic view of a second view structure of a bearing cap;
Wherein:
1-an oil cylinder body, 101-a first step structure, 102-a second step structure, 103-a third step structure and 104-a fourth step structure;
2-main shaft, 201-external screw thread, 202-tooth slot, 203-arc slot, 204-groove, 205-protruding shaft,
3-Nut sleeve, 301-internal thread, 302-external spline,
4-Top plate;
5-pressing plates;
6-spline sleeve, 601-internal spline, 602-shoulder, 603-radially projecting ring,
7-Embracing the spring;
8-end fluted disc, 801-tooth slot, 802-external thread and 801-internal spline;
9-a rear cover;
10-a common piston, 1001-a handle-shaped bulge, 1002-a main body, 1003-a circumferential mounting groove, 1004-a radial bulge structure;
11-auxiliary pistons;
12-disc springs;
13-a spring;
1401-first oil chamber, 1402-second oil chamber;
15-a retainer;
16-balls;
17-ball bearings;
18-positioning rings;
19-bearing cap, 1901-spline grooves;
20-positioning pins;
21-a protective cover;
22-set screws;
23-a dust cover;
24-limiting rings.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on," "connected to," another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be understood that the terms "upper," "lower," "bottom," and the like indicate a position or a positional relationship based on the orientation or the positional relationship described in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. The terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and not for purposes of implying importance.
The invention provides an integrated spring power unit which is compact in structure and high in modularization degree, and has the functions of service braking, emergency braking, clearance compensation, mechanical relief and the like.
The construction of the integrated spring power unit is described in detail below with reference to fig. 1.
Cylinder body 1: the method comprises the steps of forming an oil cylinder body cavity, wherein the oil cylinder body cavity is of a hollow penetrating structure, and a first step structure 101, a second step structure 102, a third step structure 103 and a fourth step structure 104 are sequentially formed along the direction from a first end to a second end of the oil cylinder body cavity in the axial direction; the cylinder block 1 formed by each step structure gradually increases in inner diameter in the direction from the first step structure 101 to the fourth step structure 104.
And a main shaft 2: the oil cylinder body 1 comprises a main body part and a shaft end part positioned at one end of the main body part, wherein the main body part is columnar and provided with external threads 201, the shaft end part is disk-shaped, and a tooth groove 202 is arranged along the disk surface of one side of the shaft end part far away from the main body part.
Nut sleeve 3: an internal thread 301 is arranged along the inner wall of the sleeve and matched with the external thread 201 of the main shaft, the internal thread 301 and the external thread are in threaded connection, a peripheral external spline 302 is arranged along the peripheral wall, one side of the external spline near the first end of the cylinder body 1 of the oil cylinder is jointed with the inner wall of the first step structure 101 of the cylinder body 1 of the oil cylinder, the internal thread 301 and the external spline can move relatively, and a sealing element is arranged at the joint of the internal thread and the external spline; the spline 302 is a circumferential bump structure arranged along the inner wall of the nut shaft sleeve 3 at intervals, the gaps between any two adjacent bumps are equal, and the bumps are uniform in size. The position of the spline 302 may be located opposite to the cylinder second stepped structure 102, the third stepped structure 103 and the fourth stepped structure 104, i.e., at a position where the first stepped structure 101 should be avoided.
Top plate 4: the sealing device is arranged on one side of the nut shaft sleeve 3 extending out of the cavity of the cylinder body 1, the top plate 4 is provided with external threads, extends into the cavity of the nut shaft sleeve 3 and is in threaded connection with the nut shaft sleeve 3, and a sealing piece is arranged at the joint of the top plate 4 and the nut shaft sleeve 3; the outer side of the top plate 4 can be further provided with a pressing plate 5, the pressing plate 5 is fixedly connected with the top plate 4, and a sealing piece is arranged at the joint of the pressing plate 5 and the top plate 4.
Spline sleeve 6: the nut shaft sleeve 3 is sleeved on the outer side of the nut shaft sleeve, and the inner wall of the nut shaft sleeve is provided with an inner spline 601 which is matched with the nut shaft sleeve spline 302; the internal spline 601 is similar in structure to the external spline 402, and the projections of the internal spline 601 can be inserted into the gaps between the projections of the external spline 402. The shoulder 602 is provided along the outer wall of the spline sleeve 6, and is a circumferential radial protruding structure arranged along the outer wall of the spline sleeve. The shaft shoulder is clamped at the position of the second stepped structure 102 of the cylinder body of the oil cylinder, and a sealing piece is arranged between the spline sleeve 6 and the inner wall of the second stepped structure 102.
Embracing spring 7: the nut shaft sleeve is arranged on the periphery of the nut shaft sleeve 4 and is positioned in an axial gap between the end face of the spline sleeve 6 and the first step structure 101; specifically, in some embodiments of the present invention, a circumferential radially protruding ring 603 is formed on a side of the spline sleeve 6 facing the first step structure 101, and is in contact with an end surface of the first step structure 101, and the armful spring 7 is located between the radially protruding ring 603 and the main shaft.
End fluted disc 8: a tooth groove 801 is arranged along the disk surface of the main shaft 2 and is matched with the disk surface provided with the tooth groove 202;
rear cover 9: is arranged at the second end of the oil cylinder body 1 of the oil cylinder; a sealing element is arranged between the rear cover 9 and the inner wall of the oil cylinder body 1.
The usual piston 10: comprising a handle-like projection 1001 and a body portion 1002, the body portion 1002 having a greater radial width relative to the handle-like projection; the handle-shaped bulge 1001 of the handle-shaped bulge is inserted into a gap between the spline sleeve 6 and the oil cylinder body 1 and is positioned between the third step structure 103 and the fourth step structure 104; the main body is sleeved outside the main shaft and limited at the fourth step structure 104, and forms a circumferential mounting groove 1003. A sealing element is arranged between the common piston 10 and the inner wall of the cylinder body, and a sealing element is also arranged on the joint surface of the common piston and the spline housing 6. The relative rotation of the conventional piston 8 and cylinder 1 is limited by a locating pin 20.
An auxiliary piston 11; a clearance is provided between the conventional piston stem-like projection 1001 and the end face of the third step structure 103, and the auxiliary piston 11 is disposed in the clearance therebetween. A sealing element is arranged between the auxiliary piston 11 and the inner wall of the cylinder body, and a sealing element is also arranged on the joint surface of the auxiliary piston and the spline housing 6.
Disc spring 12: is fitted into the circumferential mounting groove 1003 of the conventional piston main body, and is restricted between the rear cover 9 and the mounting groove 1003. A gap is formed between one side of the mounting groove, which is close to the inner wall of the cylinder body 1, and the rear cover, and a limiting ring 24 is arranged in the gap. The limiting ring 24 can also move axially of the positioning pin 20, the limiting ring 24 is connected with the inner annular surface of the cylinder body 1 in a threaded manner, and the positioning pin 20 limits the rotation between the common piston 10 and the cylinder body 1.
Spring 13: the conventional piston body 1002 forms a radial protrusion 1004 toward the spindle side, and the spring 13 is fitted between the radial protrusion and the disk-like structure at the end of the spindle.
A first oil cavity 1401 is formed among the oil cylinder body 1, the common piston 10 and the auxiliary piston 11 and is communicated with a first oil port P on the oil cylinder body, a second oil cavity 1402 is formed among the oil cylinder body 1 and the auxiliary piston 11 and is communicated with a second oil port H on the oil cylinder body. The first oil port and the second oil port are arranged at the front end of the cylinder body 1 of the oil cylinder at two sides of the auxiliary piston 11.
In some embodiments of the present invention, the present invention further comprises a retainer 15, wherein the retainer 15 is annular and is installed on the spindle 2 in a sleeved mode, and balls 16 are arranged between the retainer 15 and the disk-shaped structure at the end of the spindle; the spring 12 is located between the cage 15 and the conventional piston 10.
Further, in order to facilitate the installation of the balls 16, in some embodiments of the present invention, an arc groove 203 is provided on an end surface of the disk-shaped structure facing the side of the cage 15, and the balls are disposed in the arc groove 203. The spring 12 presses the spindle against the front end of the end disk 8 via the cage 15 and the balls 16.
In some embodiments of the present invention, external threads 802 are provided along the periphery of the end tooth disk 8, and the body of the conventional piston 10 is provided with internal cavity threads for mating connection with the end tooth disk.
In some embodiments of the present invention, the tooth grooves 202 of the main shaft disk surface are arranged at the periphery of the disk surface, and are adjacent to the tooth grooves 202, and a peripheral groove 204 is arranged at a position close to the center of the disk surface;
Further comprising a ball bearing 17 disposed within the groove 204;
The ball bearing comprises a ball bearing body 17, an end tooth disc 8 and a rear cover 9, and is characterized by further comprising a positioning ring 18 and a bearing cover 19, wherein the bearing cover 19 abuts against the ball bearing body 17, the end tooth disc 8 is sleeved on the periphery of the bearing cover 19, and the positioning ring 18 is arranged between the rear cover 9 and the bearing cover 19.
In some embodiments of the present invention, the bearing cap 19 has an internal thread, the center of the main shaft disk surface is axially provided with a protruding shaft 205, and the protruding shaft 205 has an external thread and is mounted in cooperation with the internal thread of the bearing cap 19.
In some embodiments of the invention, spline grooves 1901 are provided along the circumferential folds of the bearing cap 19, and internal splines 803 are provided along the inner circumferential wall of the end disk 8, the splines being inserted into the spline grooves 1901.
In some embodiments of the invention, further comprising:
the positioning ring 18 is arranged on the outer side of the bearing cover and is provided with a hollow shaft hole;
Protective cover 21: is arranged in the shaft hole;
set screw 22: inserted through the rear cover and screwed into the protective cover 21.
In some embodiments of the present invention, in order to solve the problem of dust prevention inside the cylinder body 1, a sealing sleeve 23 is disposed between the rear cover 9 and the common piston 10, and a sealing element is installed in an inner groove of one side of the sealing sleeve 23 facing the common piston 10; a dust cover 23 is arranged between the rear cover 9 and the positioning ring 18.
The spring power unit provided by the invention works in the following principle.
1. Passive braking
In the normal driving process, the spring power unit is in a release state, the first oil port P is filled with pressure oil, the pressure oil enters the first hydraulic oil cavity 1401, the hydraulic oil pushes the common piston 10 to move backwards, the disc spring 12 is compressed until the b surface of the notch of the common piston 10 coincides with the limiting surface a surface of the limiting ring 24 of the baffle ring, meanwhile, the common piston 10 drives the main shaft 2 to move backwards, and the main shaft 2 drives the nut shaft sleeve 3, the nut shaft top plate 4 and the pressing plate 5 to move backwards, so that a brake pad and a brake disc keep a normal release gap.
The brake applying process is as follows, the pressure oil is released from the first oil port P, so that the disc spring 12 in a compressed state under the action of the pressure oil is released, the common piston 10 is pushed to move forwards, meanwhile, the common piston 10 drives the end tooth disc 8 which is connected with the common piston through threads to move forwards, the end tooth disc 8 pushes the main shaft 2, the nut shaft sleeve 3 and the nut shaft top plate 4 to move forwards until the pressing plate 5 pushes the brake pad to press the brake disc, and braking force is generated, so that the braking of the vehicle is realized.
In the braking process, the external spline of the nut shaft sleeve 3 is matched with the internal spline of the spline sleeve 6, and the spline sleeve 6 is in threaded fastening connection with the cylinder body 1 of the oil cylinder, so that the nut shaft sleeve 3 can only axially move but cannot rotate; in addition, the spring pretightening force of the spring 13 acts on the main shaft 2 through the steel ball retainer 15 and the ball 16, so that the end face teeth on the shaft shoulder of the main shaft 2 are completely meshed with the end face teeth of the end tooth disc 8, and the main shaft 2 cannot rotate, therefore, the axial movement of the nut shaft sleeve 3 can only be realized through the rotation of the main shaft, and as long as the end face teeth on the shaft shoulder of the main shaft 2 are meshed with the end face teeth of the end tooth disc 8, the main shaft 2 cannot rotate, and the main shaft 2 and the nut shaft sleeve 3 can only axially move at the same time; in the passive braking process, the disc spring pushes the common piston 10 to move forward by a certain distance, the main shaft 2 and the nut shaft sleeve 3 move forward by a certain distance, and the pressing plate 5 pushes the brake pad to move forward by a certain distance.
2. Commonly used relief
The port P is filled with pressure oil, the pressure oil enters the first hydraulic oil cavity 1401, referring to fig. 2, the hydraulic oil pushes the common piston 10 to move backwards and compress the disc spring 12 until the b surface of the notch of the common piston 10 coincides with the a surface of the limiting ring 24 of the baffle ring, meanwhile, the common piston 10 drives the main shaft 2 to move backwards, and the main shaft 2 drives the nut shaft sleeve 3, the nut shaft top plate 4 and the pressing plate 5 to move backwards, so that the brake pad and the brake disc keep normal relief clearance.
3. Auxiliary relief
When the normal release of the vehicle fails, namely, the pressure oil is introduced into the first oil port P, the normal release pressure cannot be established to release the brake clamp, the auxiliary release mode can be used for releasing the brake clamp.
The pressure oil enters the H port and flows into the second hydraulic oil chamber 1402, referring to fig. 2, the hydraulic oil pushes the auxiliary piston 11 and the common piston 10 to move backward, compressing the disc spring 12 until the b surface of the notch of the common piston 10 coincides with the a surface of the limiting ring 24 of the retainer ring, meanwhile, the common piston 10 drives the spindle 2 to move backward, and the spindle 2 drives the nut shaft sleeve 3, the nut shaft top plate 4 and the pressing plate 5 to move backward, so that the brake pad and the brake disc keep normal relief clearance.
4. Manual mitigation
The manual release function is used for emergency manual release of the clamp through the manual release device of the brake clamp cylinder when the common release and the auxiliary release are invalid.
The manual release is implemented by screwing the protective cover 21 on the protective cover 21 down, screwing the screw matched with the screw thread in the inner cavity of the bearing cover 19 into the inner cavity of the bearing cover 19, continuously screwing the screw, converting torque into axial force to push the bearing cover to move, further applying force to the rear end of the spindle 2, and pushing the spindle 2 to move forwards, wherein the spindle is in a braking state, the pressing plate 5 presses the brake pad and is tightly attached to the brake disc, the spindle 2 cannot move forwards, only a large force can be applied to the brake pad, meanwhile, the brake pad applies a reaction force to the spindle 2, the spindle 2 transmits the force to the end fluted disc 8 and the common piston 10, the compression disc spring 12 moves backwards, at this time, the end tooth groove 202 at the rear end of the shaft shoulder of the spindle 2 is separated from the end tooth groove 801 of the end fluted disc 8, the spindle 2 and the nut shaft rotate under the condition of non-self-locking thread pair and interaction force, so that the nut shaft sleeve 3 moves backwards, the pressing plate 5 is separated from the brake pad, and the braking is released.
5. Automatic compensation for brake clearance wear
When the brake pad or the brake disc is worn, the invention has the function of automatic compensation of the brake clearance wear in order to ensure that the brake force output is stable and unchanged.
After the vehicle runs for a certain mileage, abrasion is generated on the brake pad and the brake disc, the brake gap is assumed to be L normally, the abrasion is assumed to be DeltaL on the brake pad and the brake disc, the brake gap is changed to be L+ DeltaL, the brake is applied, the pressure in the inner cavity of the first hydraulic oil is reduced, the disc spring 12 pushes the common piston 10 to move forwards, and meanwhile, the common piston 10 moves forwards with the end tooth disc 8, the main shaft 2, the nut shaft sleeve 3 and the pressing plate 5, and the moving distance is L+ DeltaL; at this time, the pressure oil is introduced into the first port P, the pressure oil enters the first hydraulic oil cavity, the hydraulic oil pushes the common piston 10 to move backwards, the disc spring 12 is compressed, when the left end surface d surface of the disc spring 2 contacts the cavity step surface c surface of the spline sleeve 6 (i.e., l=cd), the disc spring 2 cannot move leftwards any more, because the disc spring 2 and the nut sleeve 3 are in interference fit, a certain clamping force is applied, the nut sleeve 3 cannot move leftwards any more, but the common piston 10 still moves leftwards by delta L under the action of the hydraulic pressure until the surface b of the notch of the common piston 10 coincides with the limiting surface a surface of the limiting ring 24 of the baffle ring, the spindle 2 and the nut sleeve 3 are in non-self-locking threaded pair connection, at this moment, the spindle 2 is subjected to the forward pulling force of the nut shaft, the spindle holding position of the compression spring 13 is not moved, and then the end tooth grooves 801 of the end tooth discs 8 are separated from the spindle 2 at the spindle shoulder, under the action of the non-self-locking threaded pair and the pulling force, the spindle release and the spindle shaft relatively rotate with the nut shaft until the end tooth grooves 202 at the end of the spindle shoulder end of the spindle 2 and the tooth grooves 202 at the spindle shoulder end of the spindle shoulder are in the opposite directions, the corresponding to the left direction L is released, and the displacement of the corresponding nut is guaranteed, i.e., the displacement of the left-shaped disc is only is guaranteed, and the left-shaped nut is released, and the displacement is guaranteed, namely, and the displacement of the corresponding nut is left is released, and is only is released, and the displacement, and is left, and is due to the displacement.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. An integrated spring power unit comprising:
And (3) an oil cylinder body: forming an oil cylinder cavity, wherein a first step structure, a second step structure, a third step structure and a fourth step structure are sequentially formed at the axial first end of the oil cylinder cavity towards the second end;
A main shaft: the device is arranged in the cylinder body of the oil cylinder and comprises a main shaft main body part and a shaft end part positioned at one end of the main body part; the main shaft is provided with external threads, the shaft end part of the main shaft is in a disc shape, and a main shaft tooth slot is arranged along the disc surface of one side of the main shaft far away from the main shaft main body;
Nut shaft sleeve: the outer peripheral wall is provided with a peripheral spline which is attached to the inner wall of the cylinder body of the oil cylinder; the inner wall of the nut shaft sleeve is provided with an internal thread which is connected with the spindle thread;
And (3) a top plate: the nut shaft sleeve is arranged on one side of the nut shaft sleeve extending out of the cylinder body cavity of the oil cylinder;
spline sleeve: the nut shaft sleeve is sleeved on the outer side of the nut shaft sleeve, and the inner wall of the nut shaft sleeve is provided with an internal spline which is matched with the nut shaft sleeve through a spline; the outer wall of the spline sleeve is provided with a shaft shoulder which is clamped at a second step structure of the cylinder body of the oil cylinder;
And (3) spring holding: the spline sleeve is arranged on the outer periphery of the nut shaft sleeve and positioned in an axial gap between the end face of the spline sleeve and the first step structure;
A common piston: comprises a handle-shaped bulge part and a common piston main body part; the handle-shaped protruding part is inserted into a gap between the spline sleeve and the cylinder body of the oil cylinder and is positioned between the third step structure and the fourth step structure; the main body part of the common piston is sleeved outside the main shaft and limited at the fourth step structure, and forms a circumferential mounting groove;
an auxiliary piston; a first gap is formed between the handle-shaped bulge of the common piston and the end face of the third step structure, and the auxiliary piston is arranged in the first gap;
Disc spring: the device is arranged in the circumferential mounting groove and is limited between the rear cover at the second end of the cylinder body and the mounting groove, a second gap is formed between one side of the mounting groove, which is close to the inner wall of the cylinder body, and the rear cover, and a limiting ring is arranged in the second gap;
And (3) a spring: the main body part of the common piston forms a radial protruding structure towards one side of the main shaft, and the spring is sleeved and arranged between the radial protruding structure and a disc-shaped structure at the end part of the main shaft;
A first oil cavity is formed among the oil cylinder body, the common piston and the auxiliary piston and is communicated with a first oil port on the oil cylinder body, a second oil cavity is formed among the oil cylinder body, the auxiliary piston and the third stepped structure and is communicated with a second oil port on the oil cylinder body;
The main shaft tooth grooves of the main shaft disc surface are arranged on the periphery of the disc surface and adjacent to the main shaft tooth grooves, and a circumferential groove is arranged at a position close to the center of the disc surface;
Further comprising a ball bearing disposed within the groove;
the piston is characterized by further comprising an end tooth disc, wherein an end tooth disc tooth groove is arranged along the disc surface of the end tooth disc, the end tooth disc tooth groove is matched with the disc surface of the main shaft, an external thread is arranged along the periphery of the end tooth disc, and an inner cavity thread is arranged on the main body of the common piston and is matched and connected with the end tooth disc;
The ball bearing is characterized by further comprising a positioning ring and a bearing cover, wherein the bearing cover is propped against the ball bearing, a spline groove is formed along the outer peripheral wall of the bearing cover, an end tooth disc spline is formed along the inner peripheral wall of the end tooth disc, and the end tooth disc spline is inserted into the spline groove; the positioning ring is arranged between the rear cover and the bearing cover;
The main shaft is wholly located inside the cylinder body, and the end fluted disc, the locating ring and the bearing cover are also located inside the cylinder body.
2. The integrated spring power unit of claim 1, further comprising a cage, the cage being annular and being mounted on the spindle in a nested manner, balls being disposed between the cage and the disk-like structure at the end of the spindle; the spring is located between the cage and the conventional piston.
3. The integrated spring power unit according to claim 2, wherein the end face of the disk-like structure facing the side of the cage is provided with an arc groove, and the balls are disposed in the arc groove.
4. The integrated spring power unit of claim 1, wherein a side of the spline sleeve facing the first step structure forms a circumferential radially protruding ring in contact with an end surface of the first step structure, and the wrap spring is located between the radially protruding ring and the spindle.
5. The integrated spring power unit of claim 1, wherein the bearing cap has internal threads, a protruding shaft is axially disposed in the center of the main shaft disk surface, and the protruding shaft has external threads and is mounted in cooperation with the internal threads of the bearing cap.
6. The integrated spring power unit of claim 1, wherein the retaining ring: install in the axial outside of bearing cap, have hollow shaft hole, spring power unit further includes:
Protective cover: is arranged in the shaft hole;
Positioning screw: is inserted through the rear cover and is in threaded connection with the protective cover.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210756095.4A CN114992262B (en) | 2022-06-30 | 2022-06-30 | Integrated spring power unit |
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| CN202210756095.4A CN114992262B (en) | 2022-06-30 | 2022-06-30 | Integrated spring power unit |
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|---|---|
| CN114992262A (en) | 2022-09-02 |
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