CN214607462U - Drum brake connection structure, vehicle braking system and vehicle - Google Patents
Drum brake connection structure, vehicle braking system and vehicle Download PDFInfo
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- CN214607462U CN214607462U CN202023170069.9U CN202023170069U CN214607462U CN 214607462 U CN214607462 U CN 214607462U CN 202023170069 U CN202023170069 U CN 202023170069U CN 214607462 U CN214607462 U CN 214607462U
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Abstract
An embodiment of the utility model provides a drum brake connection structure, vehicle braking system and vehicle relates to car technical field, drum brake connection structure include: the brake comprises a rear axle, a transmission shaft, a brake drum and a brake shoe; the first side of the brake drum is connected with the transmission shaft, and the second side of the brake drum is connected with an input shaft in the rear axle; the brake shoe is fixedly connected with the axle housing of the rear axle. The parking torque applied to the transmission shaft by the drum brake is amplified due to the speed ratio of the rear axle, and the amplified parking torque is transmitted to the wheels through the rear axle of the vehicle so as to increase the total parking braking torque, solve the problem of insufficient parking torque caused by the adoption of the wheel-side parking brake in the prior art, and ensure the driving safety.
Description
Technical Field
The utility model relates to the field of automotive technology, in particular to drum brake connection structure, vehicle braking system and vehicle.
Background
When the vehicle is in a stop state, the parking brake is usually adopted to ensure the parking stability of the vehicle, and accidents caused by vehicle sliding when the vehicle is parked on a slope road surface are avoided. In the prior art, a wheel-side parking device is usually adopted, and the wheel-side parking device comprises an air brake, a hydraulic brake and a pull-cord brake.
At present, aiming at medium and large-sized automobiles, air brake is often adopted, so that a better parking effect can be achieved; for a small automobile, the small automobile does not have an air brake braking system, the small automobile can not be parked in a parking mode of air brake, a hydraulic brake or pull-wire brake mode in a wheel-side parking device is often adopted for parking, the two wheel-side parking devices are difficult to meet the actual parking requirement under the conditions that the vehicle is relatively high in quality or overloaded, the situation that the parking moment is insufficient to cause sliding is easily generated, and particularly when the small automobile is parked on a road with a large gradient, the problem of insufficient parking moment can cause serious traffic accidents.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a drum brake connection structure, vehicle braking system and vehicle to wheel limit parking brake parking moment is not enough among the solution prior art, can't satisfy the problem that the vehicle parking required.
In order to solve the technical problem, the utility model discloses a realize like this:
the embodiment of the utility model discloses drum brake connection structure, drum brake connection structure includes: the brake comprises a rear axle, a transmission shaft, a brake drum and a brake shoe;
the first side of the brake drum is connected with the transmission shaft, the second side of the brake drum is connected with the input shaft in the rear axle, and the first side and the second side are two sides which deviate from each other; the brake shoe is fixedly connected with the axle housing of the rear axle.
Optionally, the first side of the brake drum is detachably connected to the transmission shaft, and the second side of the brake drum is detachably connected to the input shaft in the rear axle.
Optionally, a flange is arranged on the first side of the brake drum in an axially extending manner, and the brake drum is detachably connected with the transmission shaft through the flange.
Optionally, a shaft sleeve extends from the second side of the brake drum along the axial direction, and the input shaft is detachably connected with the shaft sleeve.
Optionally, an inner spline is arranged in the shaft sleeve, an outer spline is arranged on the input shaft, and the inner spline is engaged with the outer spline.
Optionally, the drum brake connecting structure further includes: a base plate;
the first side of bottom plate with the brake shoe is connected, the second side of bottom plate with the axle housing of rear axle is connected, wherein, the first side of bottom plate with the second side of bottom plate is the both sides that deviate from each other.
Optionally, the first side of the bottom plate is detachably connected with the brake shoe, and the second side of the bottom plate is detachably connected with the axle housing of the rear axle.
Optionally, the second side of the bottom plate is detachably connected with an axle housing of the rear axle through bolts.
The embodiment of the utility model also discloses a vehicle braking system, which comprises a parking manipulator, a parking pull wire and the drum brake connecting structure;
the parking manipulator is connected with the brake shoe through the parking pull wire.
The embodiment of the utility model also discloses a vehicle with the vehicle braking system;
the brake drum is arranged between the transmission shaft and the rear axle.
Compared with the prior art, drum brake connection structure have following advantage:
the utility model discloses in install drum brake in the rear axle front end and cooperate with the transmission shaft, drum brake exerts the parking moment on the transmission shaft because the rear axle speed ratio is enlarged, and the parking moment after the enlargement passes through vehicle rear axle and transmits to the wheel to realize the increase of total parking braking moment, solved prior art, adopted the wheel limit parking brake to lead to the problem that parking moment is not enough, guaranteed driving safety; in addition, in the installation process of the drum brake, the drum brake is not limited by the size of a vehicle rim and the like, the installation space is sufficient, and the size of the drum brake can be selected according to actual requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a drum brake connection structure according to an embodiment of the present invention;
fig. 2 is a schematic structural view along a direction in a schematic structural view of a drum brake connection according to an embodiment of the present invention;
fig. 3 is a schematic structural view along the direction b in a schematic structural view of a drum brake connection according to an embodiment of the present invention;
fig. 4 is a schematic structural view along the direction c in a schematic structural view of a drum brake connection according to an embodiment of the present invention;
fig. 5 is a schematic structural view along a direction d in a schematic structural view of a drum brake connection according to an embodiment of the present invention;
fig. 6 is a schematic view of a drum brake bottom plate connection structure according to an embodiment of the present invention;
fig. 7 is a schematic structural view along a direction in a schematic structural view of a drum brake base plate connection according to an embodiment of the present invention;
fig. 8 is a schematic structural view along the direction b in a schematic structural view of a drum brake base plate connection according to an embodiment of the present invention;
fig. 9 is a schematic structural view along the direction c in a schematic structural view of a drum brake base plate connection according to an embodiment of the present invention;
fig. 10 is a schematic structural view along the direction d in a schematic structural view of a drum brake base plate connection according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to increase vehicle parking moment, solve the not enough problem of wheel limit parking brake parking moment of adoption among the prior art, save vehicle in-wheel space, see fig. 1 and fig. 6, the embodiment of the utility model provides a drum brake connection structure, drum brake connection structure includes: a rear axle 12, a transmission shaft 10, a brake drum 111 and brake shoes; a first side of the brake drum 111 is used for being connected with the transmission shaft 10, and a second side of the brake drum 111 is used for being connected with an input shaft in the rear axle 12, wherein the first side and the second side are two sides which are deviated from each other; the brake shoe is fixedly connected with an axle housing 121 of the rear axle 12.
In a vehicle having a propeller shaft 10 and a rear axle 12, a vehicle engine transmits power to the vehicle rear axle 12 through the propeller shaft 10, and distributes the power to vehicle tires via a final drive and half shafts inside the rear axle 12. When the vehicle is parked, if the vehicle rolls, the tires will feed the rotation back to the transmission shaft 10 through the power transmission path, i.e. the transmission shaft 10 will rotate when the vehicle rolls. Therefore, it is possible to mount the drum brake 11 at the front end of the rear axle 12 to be engaged with the propeller shaft 10 for applying a braking force to the propeller shaft 10 to achieve parking braking of the vehicle.
The drum brake 11 includes a brake drum 111 and brake shoes.
Specifically, the first side of brake drum 111 is connected with transmission shaft 10, and modes such as welded fastening, bolt fastening can be adopted with transmission shaft 10's connected mode to brake drum 111, the embodiment of the utility model provides a do not do the restriction to this. When the transmission shaft 10 performs power transmission rotation, the brake drum 111 rotates at the same speed as the transmission shaft 10; the second side of the brake drum 111 is connected with the input shaft 122 in the rear axle 12, wherein the input shaft 122 in the rear axle 12 is used for transmitting power to the final drive in the rear axle 12, at this time, the transmission shaft 10 can transmit power to the rear axle 12 of the vehicle and further to the rear wheels of the vehicle through the brake drum 111 and the input shaft 122, and the power transmission in the driving process of the vehicle is not affected by the connection mode.
The brake shoes are fixed to an axle housing 121 of the rear axle 12 and are fitted with the brake drum 111. When the vehicle needs to be subjected to parking braking, the brake shoes are expanded outwards under the control of the parking manipulator and rub the inner side surfaces of the brake drums 111 to apply parking braking force to the brake drums 111, and the brake drums 111 are connected with the transmission shaft 10, so that the parking braking force is applied to the transmission shaft 10. When the vehicle does not need to be subjected to parking braking, the braking state can be relieved through the parking manipulator, at the moment, the brake shoes return to the original position and a preset gap is kept between the brake shoes and the brake drum 111, and the influence on the normal running of the vehicle is avoided.
In the in-service use, the vehicle is when the ramp parking, the component force that produces along the ramp direction of overcoming vehicle self gravity, use the utility model provides a drum brake, the braking torque that need exert on the transmission shaft when just reaching braking effect is M the Grsin alpha/i, wherein G is the self gravity of vehicle, r is tire rolling radius, alpha is the ramp angle, i is the rear axle speed ratio of vehicle, the rear axle speed ratio is the gear drive ratio of main reducer in the automobile drive axle, it equals the ratio of the rotational angular velocity of transmission shaft and the rotational angular velocity of axle semi-axis, also equals the ratio of their rotational speed, this ratio is the constant that is greater than 1. From the above formula, M i ═ Grsin α, and i is a constant greater than 1, it can be seen that the rear axle speed ratio amplifies the braking torque applied to the propeller shaft, and that the amplification of the braking torque applied to the propeller shaft is more pronounced when the rear axle speed ratio is greater.
Exemplarily, when the vehicle self quality is 5600kg, the rear axle speed ratio is 4.785, and tire rolling radius is 342mm, when parking 20% slope, the parking braking moment that need exert on the transmission shaft is 754.4N m, the utility model discloses use brake drum diameter 200 mm's stopper, the braking moment that can produce on the transmission shaft is 1764N m, is far more than the required braking moment of vehicle satisfaction parking demand.
The embodiment of the utility model provides a drum brake 11 installs in rear axle 12 front end and cooperatees with transmission shaft 10, and drum brake 11 applies the parking moment on transmission shaft 10 because the rear axle speed ratio is enlarged, and the parking moment after the enlargement passes through vehicle rear axle 12 and transmits to the wheel to realize the increase of total parking braking moment, solved prior art, adopted the not enough problem of parking moment that wheel limit parking brake leads to, guaranteed driving safety; in addition, the drum brake 11 is not limited by the size of a vehicle rim or the like in the mounting process, the mounting space is sufficient, and the size of the drum brake 11 can be selected according to actual requirements.
Optionally, a first side of the brake drum 111 is detachably connected to the transmission shaft 10, and a second side of the brake drum 111 is detachably connected to the input shaft in the rear axle 12.
Referring to fig. 1, a first side of the brake drum 111 is detachably connected to the transmission shaft 10, and a second side of the brake drum 111 is detachably connected to the input shaft 122 in the rear axle 12. The detachable mode has the advantages that the detachable mode can be detached at any time according to needs without influencing the shape and the strength of the connecting piece, the brake drum 111, the transmission shaft 10 and the input shaft 122 adopt the detachable connection mode, when the drum brake 11, the rear axle 12 or the transmission shaft 10 of the vehicle breaks down, the connecting piece can be directly detached, the broken part is maintained and replaced independently, the maintenance cost is reduced, the shape and the strength of the connecting piece do not need to be damaged, and the influence on the strength of the vehicle is avoided.
Optionally, a flange 113 extends from the first side of the brake drum 111 along the axial direction, and the brake drum 111 is detachably connected to the transmission shaft 10 through the flange 113.
Referring to fig. 1, the flange connection ensures the connection strength between the transmission shaft 10 and the brake drum 111, during the driving process of the automobile, the transmission shaft 10 and the brake drum 111 rotate at the same speed, during the rotation process, the load of the connection part is large, and the flange 113 connection mode is adopted, so that the strength of the connection part is improved on the premise of ensuring the convenient disassembly of the transmission shaft 10 and the brake drum 111.
Optionally, a shaft sleeve extends from the second side of the brake drum 111 along the axial direction, and the input shaft is detachably connected with the shaft sleeve.
Referring to fig. 6, a second side of the brake drum 111 is provided with a bushing extending in an axial direction, and the input shaft 122 is detachably connected to the bushing. In the power transmission process, the transmission shaft 10, the brake drum 111 and the shaft sleeve axially extending from the second side of the brake drum 111 rotate at the same speed to transmit power to the rear axle 12 of the vehicle through the input shaft 122, the brake drum 111 and the input shaft 122 in the rear axle 12 are detachably connected through the shaft sleeve, and when the drum brake 11 breaks down, the drum brake can be independently detached, maintained or replaced. The detachable connection between the brake drum 111 and the input shaft 122 in the rear axle 12 may include a pin joint or a spline joint, which is not limited by the embodiment of the present invention.
Optionally, an inner spline is arranged in the shaft sleeve, an outer spline is arranged on the input shaft, and the inner spline is engaged with the outer spline.
Referring to fig. 6, the sleeve is provided with internal splines, and the input shaft 122 is provided with external splines, which are engaged with the internal splines. By adopting the spline connection mode, the bearing is more uniform after the internal spline and the external spline are meshed, and the contact area is larger, so that the shaft sleeve and the input shaft 122 adopt the spline connection mode, can bear larger load, and ensure the stability in the power transmission process.
Optionally, the drum brake connecting structure further includes: a base plate 112; a first side of the bottom plate 112 is connected to the brake shoe, a second side of the bottom plate 112 is connected to the axle housing 121 of the rear axle 12, wherein the first side of the bottom plate 112 and the second side of the bottom plate 112 are two sides facing away from each other.
Referring to fig. 6, the drum brake 11 further includes a base plate 112, a first side of the base plate 112 being connected to the brake shoes, and a second side of the base plate 112 being connected to an axle housing 121 of the rear axle 12. When the axle housing 121 of the rear axle 12 cannot provide a mounting plane for the brake shoes, the brake shoe plates can be mounted in the plane mounting area formed on the first side of the bottom plate 112, and the second side of the bottom plate 112 is connected with the axle housing 121, so that the braking effect of the drum brake 11 is ensured.
Alternatively, the first side of the bottom plate 112 is detachably connected to the brake shoe, and the second side of the bottom plate 112 is detachably connected to the axle housing 121 of the rear axle 12.
Referring to FIG. 6, a first side of the base plate 112 is removably coupled to the brake shoes and a second side of the base plate 112 is removably coupled to an axle housing 121 of the rear axle 12. The adoption can dismantle the mode of connecting, can directly dismantle its connecting piece, maintain alone the change to the spare part that breaks down, reduced cost of maintenance.
Alternatively, the second side of the bottom plate 112 is detachably connected to the axle housing 121 of the rear axle 12 by bolts.
Referring to fig. 6, the second side of the base plate 112 is detachably bolted to the axle housing 121 of the rear axle 12. Bolts may pass through the axle housing 121 and the bottom plate 112 in sequence to connect the axle housing 121 and the bottom plate 112. The adoption can dismantle the mode of connecting, can directly dismantle its connecting piece, maintain alone the change to the spare part that breaks down, reduced cost of maintenance.
The embodiment of the utility model provides a vehicle braking system with above-mentioned drum brake connection structure is still provided, vehicle braking system still includes that parking executor, parking are acted as go-between, and parking executor is acted as go-between with the brake shoe through the parking and is connected.
Due to the adoption of the drum brake connecting structure, the parking torque applied to the transmission shaft 10 by the drum brake 11 is amplified due to the speed ratio of the rear axle, and the amplified parking torque is transmitted to the wheels through the rear axle 12 of the vehicle, so that the increase of the total parking braking torque is realized, the problem of insufficient parking torque caused by the adoption of a wheel-side parking brake in the prior art is solved, and the driving safety is ensured; in addition, the drum brake 11 is not limited by the size of a vehicle rim or the like in the mounting process, the mounting space is sufficient, and the size of the drum brake 11 can be selected according to actual requirements.
In the actual use process, the parking manipulator controls the brake shoes in the drum brake 11 through the parking pull wire, when a user switches the parking manipulator into a parking mode, the brake shoes are controlled to expand through the parking pull wire, the inner side surface of the friction brake drum 111 is squeezed to lock the brake drum 111, and the parking effect is achieved. The parking manipulator can be the parking pull rod, also can be electron parking button, the embodiment of the utility model provides a do not do the restriction to this.
The embodiment of the utility model provides a vehicle that has above-mentioned vehicle braking system is still provided.
In the driving process, the vehicle braking system is carried, so that a larger parking torque can be obtained when the vehicle is parked, the vehicle slipping phenomenon is not easy to occur, and the stability of the vehicle in the parking state is ensured. Meanwhile, the vehicle brake system is mounted, the wheel side parking brake system can be replaced, the mounting position is located at the front end of a rear axle of the vehicle, the mounting space is sufficient, the size of the drum brake 11 can be selected according to actual requirements, and the size limit of a vehicle rim and the like is not required to be considered.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided by the present application are described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understanding the present application, and the content of the present description should not be construed as limiting the present application. While various modifications of the illustrative embodiments and applications will be apparent to those skilled in the art based upon this disclosure, it is not necessary or necessary to exhaustively enumerate all embodiments, and all obvious variations and modifications can be resorted to, falling within the scope of the disclosure.
Claims (10)
1. A drum brake coupling structure, characterized by comprising: the brake comprises a rear axle (12), a transmission shaft (10), a brake drum (111) and a brake shoe;
a first side of the brake drum (111) is connected with the transmission shaft (10), a second side of the brake drum (111) is connected with an input shaft (122) in the rear axle (12), wherein the first side and the second side are two sides which are deviated from each other;
the brake shoe is fixedly connected with an axle housing (121) of the rear axle (12).
2. A drum brake connection according to claim 1, characterized in that a first side of the brake drum (111) is detachably connected to the transmission shaft (10) and a second side of the brake drum (111) is detachably connected to an input shaft (122) in the rear axle (12).
3. A drum brake connection according to claim 2, characterized in that the first side of the brake drum (111) is provided with a flange (113) extending in the axial direction, the brake drum (111) being detachably connected to the transmission shaft (10) via the flange (113).
4. A drum brake connection according to claim 2, characterized in that the second side of the brake drum (111) is provided with a sleeve extending in axial direction, the input shaft (122) being detachably connected to the sleeve.
5. A drum brake connection according to claim 4, characterized in that the sleeve is provided with internal splines and the input shaft (122) is provided with external splines, the internal splines engaging with the external splines.
6. The drum brake coupling structure according to claim 1, further comprising: a base plate (112);
the first side of bottom plate (112) with the brake shoe is connected, the second side of bottom plate (112) with axle housing (121) of rear axle (12) are connected, wherein, the first side of bottom plate (112) with the second side of bottom plate (112) is the both sides that deviate from each other.
7. A drum brake attachment arrangement according to claim 6, characterised in that a first side of the base plate (112) is releasably attached to the brake shoes and a second side of the base plate (112) is releasably attached to the axle housing (121) of the rear axle (12).
8. The drum brake connection according to claim 7, characterized in that the second side of the base plate (112) is detachably connected to the axle housing (121) of the rear axle (12) by bolts.
9. A vehicle braking system, comprising: a parking manipulator, a parking cable, and the drum brake attachment structure of any one of claims 1 to 8;
the parking manipulator is connected with the brake shoe through the parking pull wire.
10. A vehicle characterized by comprising the vehicle brake system of claim 9;
the brake drum (111) is arranged between the transmission shaft (10) and the rear axle (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023170069.9U CN214607462U (en) | 2020-12-24 | 2020-12-24 | Drum brake connection structure, vehicle braking system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023170069.9U CN214607462U (en) | 2020-12-24 | 2020-12-24 | Drum brake connection structure, vehicle braking system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214607462U true CN214607462U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023170069.9U Active CN214607462U (en) | 2020-12-24 | 2020-12-24 | Drum brake connection structure, vehicle braking system and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN214607462U (en) |
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2020
- 2020-12-24 CN CN202023170069.9U patent/CN214607462U/en active Active
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