CN212766180U - Automobile and wheel-side parking brake device thereof - Google Patents
Automobile and wheel-side parking brake device thereof Download PDFInfo
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- CN212766180U CN212766180U CN202021573306.3U CN202021573306U CN212766180U CN 212766180 U CN212766180 U CN 212766180U CN 202021573306 U CN202021573306 U CN 202021573306U CN 212766180 U CN212766180 U CN 212766180U
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Abstract
The utility model discloses an automobile and wheel limit parking arresting gear thereof. In this wheel limit parking brake device: the one-way ratchet mechanism comprises a ratchet wheel, a stopping pawl and an elastic piece for forcing the stopping pawl and a tooth socket on the ratchet wheel to keep contact; the driving mechanism is used for driving the ratchet wheel to rotate around the central axis; the reciprocating mechanism comprises a guide mechanism and a sliding part used for connecting the braking part, and the sliding part can reciprocate along the guide mechanism; one end of the connecting rod is hinged with the sliding piece, and the distance between the hinged point of the other end on the ratchet wheel and the central axis of the ratchet wheel is greater than zero; the driving mechanism drives the sliding piece to reciprocate along the guide mechanism through the ratchet wheel and the connecting rod, so that the braking piece connected with the sliding piece can realize braking or loosening. The wheel-side parking brake device has the advantages of short transmission path, quick braking response, high braking efficiency and large braking force in the braking process.
Description
Technical Field
The utility model relates to a vehicle manufacturing technical field, in particular to wheel limit parking arresting gear to and a be provided with this wheel limit parking arresting gear's car.
Background
Parking braking is different from service braking, and parking braking is mainly used for ensuring reliable parking of an automobile after the automobile stops. Currently, a wheel parking system mainly adopts a pull-cord parking brake (hand brake). The parking cable connection structure generally includes a main cable, a left auxiliary cable, and a right auxiliary cable. During parking braking, a driver pulls the hand brake, the hand brake manipulator amplifies the hand brake control force, and the hand brake control force acts on the parking brake through the brake cable connector respectively to realize parking braking.
When the stay wire parking brake is adopted, the main stay wire needs to pull the core wire of the left auxiliary stay wire and the core wire of the right auxiliary stay wire at the same time, the brake mode has long transmission path and slow brake response, so the parking brake efficiency is low and the brake speed is slow. In addition, the stay wire is long, and the arrangement in the automobile is orderly inconvenient. The parking brake force of acting as go-between is less, and along with the car to the demand of parking brake force bigger and bigger, parking brake of acting as go-between hardly satisfies the market demand.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a wheel-side parking brake device and a vehicle provided with the wheel-side parking brake device, which have a short transmission path, fast braking response, high braking efficiency and large braking force during braking.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a wheel limit parking brake device, includes actuating mechanism, one-way ratchet, reciprocating mechanism and connecting rod, wherein:
the one-way ratchet mechanism comprises a ratchet wheel, a stopping claw and an elastic piece for forcing the stopping claw and a tooth socket on the ratchet wheel to keep contact;
the driving mechanism is used for driving the ratchet wheel to rotate around a central axis;
the reciprocating mechanism comprises a guide mechanism and a sliding piece connected with the braking piece, and the sliding piece can reciprocate along the guide mechanism;
one end of the connecting rod is hinged with the sliding piece, and the distance between the other end of the connecting rod on the ratchet wheel and the central axis of the ratchet wheel is greater than zero;
the driving mechanism drives the sliding piece to reciprocate along the guide mechanism through the ratchet wheel and the connecting rod, so that the braking piece connected with the sliding piece is braked or released.
In the above wheel-side parking brake apparatus, the slider includes a sleeve, a push-pull rod, and a constant-force spring, wherein:
the sleeve is in sliding fit with the guide mechanism and is connected with the braking part;
the sliding end of the push-pull rod is arranged in the sleeve and is in sliding fit with the sleeve, and the connecting end of the push-pull rod penetrates through a through hole in the bottom of the sleeve and is hinged with the connecting rod;
the constant force spring is sleeved on the push-pull rod, and two ends of the constant force spring are respectively abutted against the sliding end of the push-pull rod and the cylinder bottom of the sleeve.
In the above wheel-side parking brake apparatus, the slider includes a sleeve, a push-pull rod, and a constant-force spring, wherein:
the sleeve is in sliding fit with the guide mechanism and is hinged with the connecting rod;
the sliding end of the push-pull rod is arranged in the sleeve and is in sliding fit with the sleeve, and the connecting end of the push-pull rod extends out of the opening of the sleeve and is connected with the braking piece;
and two ends of the constant force spring are respectively abutted with the sliding end of the push-pull rod and the cylinder top of the sleeve.
In the wheel-side parking brake device, the guide mechanism is a linear groove, and the sleeve is provided in the linear groove so as to be relatively slidable.
In the wheel-side parking brake device, a slide key is provided between the linear groove and the sleeve.
In the above wheel-side parking brake device, the drive mechanism includes a drive motor, a worm, and a worm wheel, wherein:
the turbine is coaxially connected with the ratchet wheel;
the driving motor drives the worm to rotate so as to drive the ratchet wheel connected with the turbine to rotate around the central shaft.
In the above wheel-side parking brake device, the worm wheel is provided integrally with the ratchet wheel, wherein:
the ratchet wheel comprises a middle fixing piece and a rotary disc; the rotary table is arranged on the middle fixing piece in a relatively rotating manner, and the middle fixing piece is positioned at the center of the rotary table;
a circular ring frame is arranged on the rotary table, the tooth grooves are formed in the inner side of the circular ring frame, and the central axis of the circular ring frame is collinear with the central axis of the rotary table;
and transmission teeth matched with the worm are arranged on the peripheral side of the turntable and/or the peripheral side of the circular ring frame.
In the wheel-side parking brake device, one end of the locking pawl is a hinged end hinged with a fixed point, and the other end of the locking pawl is a clamping end used for realizing reverse self-locking with a tooth socket on the ratchet wheel;
one end of the elastic piece is fixed, and the other end of the elastic piece enables the clamping end of the stopping claw to be abutted to the tooth groove.
In the wheel-side parking brake device, a central axis of the ratchet wheel and a central axis of the guide mechanism are perpendicular and coplanar.
An automobile in which a wheel-side parking brake device as described above is provided.
The utility model provides a working process of wheel limit parking arresting gear and car includes:
the driving mechanism drives the sliding piece to reciprocate along the guide mechanism through the ratchet wheel and the connecting rod, so that the braking piece connected with the sliding piece is braked or released.
According to the technical scheme, the wheel-side parking brake device is provided with the pull wire in the prior art, and the transmission system with the one-way ratchet mechanism, the reciprocating mechanism and the connecting rod as the braking parts is adopted, so that the transmission path is short, the braking response is fast, the braking efficiency is high, and the braking force is large.
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 cable wheel-side parking brake device according to a first embodiment of the present invention;
fig. 2 is a schematic view of a reciprocating mechanism in a cable wheel-side parking brake device according to a first embodiment of the present invention;
fig. 3 is a schematic view of a one-way ratchet mechanism in a cable wheel parking brake device according to a first embodiment of the present invention;
fig. 4 is a schematic view of a worm and gear mechanism in a cable wheel parking brake device according to a first embodiment of the present invention;
fig. 5 is a schematic view of a link structure in a cable wheel-side parking brake device according to a first embodiment of the present invention;
fig. 6 is a schematic view of a hold-down wheel-side parking brake device according to a second embodiment of the present invention;
fig. 7 is a schematic view of a reciprocating mechanism in a hold-down wheel-side parking brake device according to a second embodiment of the present invention.
Wherein:
1-reciprocating mechanism, 2-driving mechanism, 3-one-way ratchet mechanism, 4-connecting rod,
11-linear groove, 12-sliding key, 13-sleeve, 14-push-pull rod, 15-constant force spring,
16-a sleeve connecting buckle, wherein the sleeve connecting buckle is arranged on the sleeve,
31-ratchet wheel, 32-stopping pawl, 33-elastic piece, 34-middle fixing piece,
21-drive motor, 22-worm, 23-turbine,
41-a first rotating pair and 42-a second rotating pair.
Detailed Description
The utility model discloses a wheel limit parking arresting gear to and be provided with this wheel limit parking arresting gear's car, its transmission path among the braking process is short, the braking response is fast, braking efficiency is higher, and the braking force is great moreover.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
First embodiment
The utility model discloses a first concrete embodiment provides a wheel limit parking arresting gear specifically is cable-stayed wheel limit parking arresting gear.
Referring to fig. 1 to 5, fig. 1 is a schematic view of a cable wheel parking brake device according to a first embodiment of the present invention; fig. 2 is a schematic view of a reciprocating mechanism in a cable wheel-side parking brake device according to a first embodiment of the present invention; fig. 3 is a schematic view of a one-way ratchet mechanism in a cable wheel parking brake device according to a first embodiment of the present invention; fig. 4 is a schematic view of a worm and gear mechanism in a cable wheel parking brake device according to a first embodiment of the present invention; fig. 5 is a schematic view of a link structure in a cable wheel-side parking brake device according to a first embodiment of the present invention.
The utility model discloses wheel limit parking arresting gear that first embodiment provided, including actuating mechanism 2, one-way ratchet 3, reciprocating mechanism 1 and connecting rod 4. Wherein:
referring to fig. 1 and 3, the one-way ratchet mechanism 3 includes a ratchet wheel 31, a stopping pawl 32 and an elastic member 33 for forcing the stopping pawl 32 and a tooth socket on the ratchet wheel 31 to maintain contact, when in use, a central hinge point of the ratchet wheel 31 is fixedly constrained by an intermediate fixing member 34, the stopping pawl 32 is always maintained in contact with the tooth socket on the ratchet wheel 31 under the action of the elastic member 33, and the ratchet wheel 31 can only rotate in a forward direction, for example, the ratchet wheel 31 can only rotate in a counterclockwise direction as shown in the arrow direction of fig. 1;
the driving mechanism 2 is used for driving the ratchet wheel 31 to rotate around the central axis;
the reciprocating mechanism 1 comprises a guide mechanism and a sliding part used for connecting a braking part (a braking cushion block or a braking sheet), when in use, the guide mechanism is fixedly restrained, and the sliding part is arranged on the guide mechanism and can reciprocate along the guide mechanism;
one end of the connecting rod 4 is hinged with the sliding piece of the reciprocating mechanism 1, and the distance d between the hinged point of the other end on the ratchet wheel 31 and the central axis of the ratchet wheel 31 is larger than zero, specifically, referring to fig. 1 and 5, the joint between the connecting rod 4 and the sliding piece of the reciprocating mechanism 1 constitutes a first rotating pair 41, and the joint between the connecting rod 4 and the ratchet wheel 31 constitutes a second rotating pair 42.
When the wheel-side parking brake device is used, the device is connected into an automobile hub through related fixed constraints (namely, fixed constraints of a guide mechanism and fixed constraints of a central hinge point of a ratchet wheel 31), and the working process of the device comprises the following steps:
if the driving mechanism 2 drives the sliding part to move along the guide mechanism in the positive direction through the ratchet wheel 31 and the connecting rod 4 (i.e. the sliding part moves to the right as shown in figure 1), the sliding part pushes the braking part to press the wheel hub to realize braking. Specifically, referring to fig. 1, when the connecting rod 4 moves to the horizontal direction, the first rotating pair 41 is located at the left side of the middle fixing member 34, and the second rotating pair 42 is located at the right side of the middle fixing member 34, at this time, the sliding member moves to the right end limit position, so that the braking member is pulled to press the hub to realize braking.
And (II) if the driving mechanism 2 drives the sliding piece to move reversely along the guide mechanism through the ratchet wheel 31 and the connecting rod 4, the braking piece is far away from the hub to cancel braking. Specifically, referring to fig. 1, when the connecting rod 4 moves to the horizontal direction, the first rotating pair 41 and the second rotating pair 42 are both located at the left side of the middle fixing member 34, and at this time, the sliding member moves to the left end limit position, so that the braking member is far away from the hub, and the braking is cancelled.
According to the technical scheme, the wheel-side parking brake device is provided with the pull wire in the prior art, and the transmission system with the one-way ratchet mechanism 3, the reciprocating mechanism 1 and the connecting rod 4 as braking parts is adopted, so that the transmission path is short, the braking response is fast, the braking efficiency is high, and the braking force is large.
Specifically, referring to fig. 2, in the wheel-side parking brake apparatus described above, the slider in the reciprocator 1 includes a sleeve 13, a push-pull rod 14, and a constant-force spring 15. Wherein:
the sleeve 13 is in sliding fit with the guide mechanism and is connected with the braking part;
the sliding end of the push-pull rod 14 is arranged in the sleeve 13 and is in sliding fit with the sleeve, and the connecting end of the push-pull rod 14 penetrates through the through hole at the bottom of the sleeve 13 and is hinged with the connecting rod 4; wherein, the cylinder bottom is one side provided with a through hole, and the other side opposite to the cylinder bottom is the cylinder top;
the constant force spring 15 is sleeved on the push-pull rod 14, and two ends of the constant force spring 15 are respectively abutted against the sliding end of the push-pull rod 14 and the cylinder bottom of the sleeve 13.
When the push-pull rod 14 moves rightward, the sleeve 13 moves rightward by applying a pushing force to the sleeve 13 via the constant force spring 15. When the connecting rod 4 moves to the horizontal direction, and the first rotating pair 41 is positioned at the left side of the middle fixing piece 34, and the second rotating pair 42 is positioned at the right side of the middle fixing piece 34, at this time, the compression amount of the constant force spring 15 is maximum, and the sliding piece moves to the right end limit position, so that the braking piece is pulled to press the wheel hub to realize braking.
The push-pull rod 14 moves to the left until the connecting rod 4 moves to the horizontal direction, and the first rotating pair 41 and the second rotating pair 42 are both located at the left side of the middle fixing member 34, at this time, the compression amount of the constant force spring 15 is minimum, and the sliding member moves to the left end limit position, so that the braking member is far away from the hub, and the braking is cancelled.
Preferably, the guide mechanism in the reciprocating mechanism 1 is a linear groove 11, and the sleeve 13 is slidably disposed in the linear groove 11. Further, a sliding key 12 is provided between the linear groove 11 and the sleeve 13. During operation, the outer surface of the sliding chute 11 is fixedly restrained, and the sleeve 13 can move in the horizontal direction along the sliding key 12.
Specifically, referring to fig. 1 and 4, in the wheel-side parking brake apparatus described above, the drive mechanism 2 includes a drive motor 21, a worm 22, and a worm wheel 23. Wherein: the turbine 23 is coaxially connected with the ratchet wheel 31; the driving motor 21 drives the worm 22 to rotate, so as to drive the ratchet wheel 31 connected with the worm wheel 23 to rotate around the central shaft.
Specifically, referring to fig. 1 and 3, in the wheel-side parking brake device described above, the worm wheel 23 is provided integrally with the ratchet wheel 31, that is, the ratchet wheel 31 includes an intermediate fixing member 34 and a dial. Wherein: the rotary table is relatively rotatably arranged on the middle fixing piece 34, and the middle fixing piece 34 is positioned at the central position of the rotary table; a circular ring frame is arranged on the rotary table, a tooth socket is arranged on the inner side of the circular ring frame, and the central axis of the circular ring frame is collinear with the central axis of the rotary table; the circumferential side of the turntable and/or the circumferential side of the ring frame are provided with drive teeth which cooperate with the worm 22, i.e. the worm wheel 23 may be constituted by the drive teeth on the circumferential side of the turntable and/or the ring frame.
In this embodiment, the worm wheel 23 and the ratchet wheel 31 are integrally arranged, so that the space occupied by the device is further reduced, the compactness of the structure is increased, and the transmission of the torque is more efficient and stable.
Specifically, referring to fig. 1 and 3, in the wheel-side parking brake device, one end of the locking pawl 32 is a hinged end hinged to the opposite fixed point, and the other end is a clamping end for realizing reverse self-locking with a tooth space on the ratchet wheel 31; one end of the elastic member 33 is fixed and the other end is connected to the catching end of the locking pawl 32 so that the locking pawl 32 is held in contact with the tooth grooves of the ratchet wheel 31. In the working process, the ratchet wheel 31 rotates anticlockwise to realize braking or cancel braking; the holding pawl 32 serves to prevent the ratchet wheel 31 from rotating clockwise.
Specifically, the central axis of the ratchet 31 and the central axis of the guide mechanism are perpendicular and coplanar. The central axis of the guide means is the same central axis as the sliding direction of the slider, for example, a broken line L in fig. 2.
In summary, when the cable wheel-side parking brake device according to the first embodiment of the present invention starts braking (see fig. 1 to 5):
the hand brake is pulled, the driving motor 21 is started to drive the worm 22 to rotate, the torque is transmitted to the turbine 23, the turbine 23 rotates anticlockwise, the force increasing effect can be achieved according to the transmission principle of the turbine and the worm, and the reverse self-locking function can be achieved. The stop pawl 32 can limit the clockwise rotation of the ratchet wheel 31 under the action of the elastic member 33 and can support the whole structure. When the ratchet wheel 31 rotates anticlockwise, the connecting rod 4 drives the push-pull rod 14 to move horizontally rightwards through the revolute pair, the constant force spring 15 is compressed, the acting force of the constant force spring 15 acts on the sleeve 13, and the sleeve 13 moves rightwards along the sliding key 12 under the action of the spring force, so that parking braking is generated. In the process, the reciprocating mechanism 1 converts the rotation action of the worm gear mechanism and the one-way ratchet mechanism 3 into linear motion, and has obvious force boosting effect. Moreover, the wheel-side parking brake device has good force limiting effect due to the fact that the constant force spring 15 is adopted. Furthermore, the input/output relationship of the reciprocating mechanism 1 is determined, and the maximum pulling/compressing position of the constant force spring 15 does not cause the motor load to be increased remarkably.
Therefore, the stay cable type wheel side parking brake device has the following advantages:
simple and reliable mechanical mechanism combination connection such as worm and gear, ratchet wheel and reciprocating motion is applied, and the reliability is high;
the worm wheel 23 and the ratchet wheel 31 are integrated, so that the worm wheel and worm mechanism can realize the boosting function and also has the reverse self-locking function, and the volume of the whole space is reduced;
because the stop pawl 32 (also called pawl) is meshed with the ratchet wheel 31, the stop pawl 32 can bear part of the weight of the ratchet wheel 31 and the whole device, and meanwhile, the one-way ratchet mechanism 3 also has the effect of reverse self-locking;
the reciprocating mechanism 1 can change the rotation motion of the worm gear and the worm and the unidirectional ratchet mechanism 3 into reciprocating motion, which is beneficial to the reinforcement of the parking device;
since the whole braking device is arranged inside the wheel, space has certain requirements (namely, the space cannot be too thick) for the radial size of the braking device, and the wheel-side parking braking device is mainly combined in series through a mechanical structure, so that the space arrangement is convenient;
the constant force spring 15 has a force limiting function due to constant elasticity and can realize overrunning reset;
all mechanical mechanisms in the wheel side parking brake device are in contact fit, and the wheel side parking brake device has the advantages of short brake response time and quick action.
Second embodiment
The utility model discloses a second concrete embodiment provides a wheel limit parking arresting gear specifically is pressing mode wheel limit parking arresting gear.
Referring to fig. 6 to 7, fig. 6 is a schematic view of a hold-down wheel-side parking brake device according to a second embodiment of the present invention; fig. 7 is a schematic view of a reciprocating mechanism in a hold-down wheel-side parking brake device according to a second embodiment of the present invention.
The utility model discloses the compacting wheel limit parking arresting gear that the second embodiment provided with the utility model discloses the difference of the pull rope formula wheel limit parking arresting gear that the first embodiment provided only lies in the slider structure different, but other structures cross reference.
Specifically, the second embodiment of the present invention provides a slider in a wheel-side parking brake device, which includes a sleeve 13, a push-pull rod 14, and a constant-force spring 15. Wherein:
the sleeve 13 is in sliding fit with the guide mechanism and is hinged with the connecting rod 4, for example, a connecting buckle 16 is arranged on the outer side of the sleeve 13 and the top of the sleeve, and the sleeve 13 is hinged with the connecting rod 4 through the connecting buckle 16;
the sliding end of the push-pull rod 14 is arranged in the sleeve 13 and is in sliding fit with the sleeve, and the connecting end of the push-pull rod 14 extends out of the opening of the sleeve 13 and is connected with the braking part;
two ends of the constant force spring 15 are respectively abutted against the sliding end of the push-pull rod 14 and the cylinder top of the sleeve 13.
When the sleeve 13 moves leftward, the pushing force is applied to the push-pull rod 14 by the constant force spring 15, so that the push-pull rod 14 moves leftward. When the connecting rod 4 moves to the horizontal direction and the first rotating pair 41 and the second rotating pair 42 are both located at the left side of the middle fixing piece 34, at this time, the compression amount of the constant force spring 15 is maximum, and the sliding piece moves to the left end limit position, so that the braking piece is pressed to press the hub to realize braking.
The sleeve 13 moves to the right until the connecting rod 4 moves to the horizontal direction, and the first rotating pair 41 is positioned at the left side of the middle fixing member 34, and the second rotating pair 42 is positioned at the right side of the middle fixing member 34, at which time, the compression amount of the constant force spring is minimum, and the sliding member moves to the right end limit position, so that the braking member is far away from the hub, and the braking is cancelled.
In summary, when the hold-down wheel-side parking brake device according to the second embodiment of the present invention starts braking (see fig. 6 to 7, and fig. 3 and 4):
the hand brake is pulled, the driving motor 21 is started to drive the worm 22 to rotate, the torque is transmitted to the turbine 23, the turbine 23 rotates anticlockwise, the force increasing effect can be achieved according to the transmission principle of the turbine and the worm, and the reverse self-locking function can be achieved. The stop pawl 32 can limit the clockwise rotation of the ratchet wheel 31 under the action of the elastic member 33 and can support the whole structure. When the ratchet wheel 31 rotates counterclockwise, the connecting rod 4 acts on the sleeve connecting buckle 16 of the reciprocating mechanism 1 through a revolute pair and drives the sleeve 13 to move horizontally leftward along the sliding key 12, when the sleeve 13 moves leftward, acting force acts on the constant force spring 15, the constant force spring 15 compresses and transmits elastic force to the push-pull rod 14, so that the push-pull rod 14 moves horizontally leftward, and the push-pull rod 14 is connected with a braking piece, so that the braking piece can be squeezed to generate parking braking through the horizontal movement of the push-pull rod 14. In the process, the reciprocating mechanism 1 converts the rotation action of the worm gear mechanism and the one-way ratchet mechanism 3 into linear motion, and has obvious force boosting effect. Moreover, the wheel side parking brake device has good force limiting effect because the constant force spring 15 is introduced. Furthermore, the input/output relationship of the reciprocating mechanism 1 is determined, and the maximum pulling/compressing position of the constant force spring 15 does not cause the motor load to be increased remarkably.
It is thus clear that this pressing mode wheel limit parking arresting gear, except the utility model discloses the advantage of the cable formula wheel limit parking arresting gear that the first embodiment provided still has following advantage:
determining the maximum compression position of the constant force spring 15 according to the stroke distance of the parking brake push-pull rod of the reciprocating mechanism, thereby determining the performance of the driving motor 21 and enabling the load of the driving motor 21 to be controllable;
because of the adoption of the constant force spring 15, the pressing force can be accurately controlled, the whole device is not influenced by gaps and errors, the control difficulty of the whole device is low, and the maintenance is hardly needed in the whole service life period.
Third embodiment
The utility model discloses third embodiment provides a car, is provided with in this car the utility model discloses first embodiment or the utility model discloses the wheel limit parking brake device that provides in the second embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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. 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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a wheel limit parking brake device which characterized in that, includes actuating mechanism (2), one-way ratchet (3), reciprocating mechanism (1) and connecting rod (4), wherein:
the one-way ratchet mechanism (3) comprises a ratchet wheel (31), a stopping claw (32) and an elastic piece (33) for forcing the stopping claw (32) and a tooth socket on the ratchet wheel (31) to keep contact;
the driving mechanism (2) is used for driving the ratchet wheel (31) to rotate around a central axis;
the reciprocating mechanism (1) comprises a guide mechanism and a sliding piece connected with the braking piece, and the sliding piece can reciprocate along the guide mechanism;
one end of the connecting rod (4) is hinged with the sliding piece, and the distance between the hinged point of the other end on the ratchet wheel (31) and the central axis of the ratchet wheel (31) is greater than zero;
the driving mechanism (2) drives the sliding piece to reciprocate along the guide mechanism through the ratchet wheel (31) and the connecting rod (4) so as to brake or release the braking piece connected with the sliding piece.
2. Wheel-side parking brake device according to claim 1, characterized in that the slider comprises a sleeve (13), a push-pull rod (14) and a constant force spring (15), wherein:
the sleeve (13) is in sliding fit with the guide mechanism and is connected with the braking part;
the sliding end of the push-pull rod (14) is arranged in the sleeve (13) and is in sliding fit with the sleeve, and the connecting end of the push-pull rod (14) penetrates through a through hole in the bottom of the sleeve (13) and is hinged with the connecting rod (4);
the constant force spring (15) is sleeved on the push-pull rod (14), and two ends of the constant force spring (15) are respectively abutted to the sliding end of the push-pull rod (14) and the cylinder bottom of the sleeve (13).
3. Wheel-side parking brake device according to claim 1, characterized in that the slider comprises a sleeve (13), a push-pull rod (14) and a constant force spring (15), wherein:
the sleeve (13) is in sliding fit with the guide mechanism and is hinged with the connecting rod (4);
the sliding end of the push-pull rod (14) is arranged in the sleeve (13) and is in sliding fit with the sleeve, and the connecting end of the push-pull rod (14) extends out of the opening of the sleeve (13) and is connected with the braking part;
and two ends of the constant force spring (15) are respectively abutted against the sliding end of the push-pull rod (14) and the cylinder top of the sleeve (13).
4. Wheel-side parking brake device according to any of claims 2 or 3, characterized in that the guiding means is a linear groove (11), the sleeve (13) being relatively slidably arranged in the linear groove (11).
5. Wheel-side parking brake arrangement according to claim 4, characterized in that a feather key (12) is provided between the linear groove (11) and the sleeve (13).
6. Wheel-side parking brake device according to claim 1, characterized in that the drive mechanism (2) comprises a drive motor (21), a worm (22) and a worm wheel (23), wherein:
the turbine (23) is coaxially connected with the ratchet wheel (31); the driving motor (21) drives the worm (22) to rotate so as to drive the ratchet wheel (31) connected with the worm wheel (23) to rotate around a central shaft.
7. Wheel-side parking brake device according to claim 6, characterized in that the turbine wheel (23) is provided integrally with the ratchet wheel (31), wherein:
the ratchet wheel (31) comprises an intermediate fixing piece (34) and a rotating disc,
the rotary disc is relatively rotatably arranged on the middle fixing piece (34), and the middle fixing piece (34) is positioned at the center of the rotary disc;
a circular ring frame is arranged on the rotary table, the tooth grooves are formed in the inner side of the circular ring frame, and the central axis of the circular ring frame is collinear with the central axis of the rotary table;
and transmission teeth matched with the worm (22) are arranged on the peripheral side of the turntable and/or the peripheral side of the circular ring frame.
8. The wheel side parking brake device according to claim 1, wherein one end of the locking pawl (32) is a hinged end hinged with a fixed point, and the other end of the locking pawl is a clamping end used for realizing reverse self-locking with a tooth socket on the ratchet wheel (31);
one end of the elastic piece (33) is fixed, and the other end of the elastic piece props the clamping end of the stopping claw (32) to the tooth groove.
9. Wheel-side parking brake device according to claim 1, characterized in that the central axis of the ratchet wheel (31) and the central axis of the guiding mechanism are perpendicular and coplanar.
10. An automobile, characterized in that a wheel-side parking brake device according to any one of claims 1 to 9 is provided.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021573306.3U CN212766180U (en) | 2020-07-31 | 2020-07-31 | Automobile and wheel-side parking brake device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021573306.3U CN212766180U (en) | 2020-07-31 | 2020-07-31 | Automobile and wheel-side parking brake device thereof |
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| Publication Number | Publication Date |
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| CN212766180U true CN212766180U (en) | 2021-03-23 |
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| CN202021573306.3U Active CN212766180U (en) | 2020-07-31 | 2020-07-31 | Automobile and wheel-side parking brake device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118144746A (en) * | 2024-05-09 | 2024-06-07 | 第一拖拉机股份有限公司 | Automatic parking control system and method for tractor based on double-motor driving |
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2020
- 2020-07-31 CN CN202021573306.3U patent/CN212766180U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118144746A (en) * | 2024-05-09 | 2024-06-07 | 第一拖拉机股份有限公司 | Automatic parking control system and method for tractor based on double-motor driving |
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