JPH0625407Y2 - Parking brake operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a parking brake operating device used for operating a parking brake for a vehicle.

[Prior Art] A parking brake operating device for a vehicle is formed so that a parking brake can be operated simply by gripping a grip of an operating lever and rotating the operating lever all at once by a predetermined angle.

However, in this type of operating device, when the operating lever is turned, the claw member and the locking tooth engage intermittently, so that a striking sound is continuously generated, which becomes noise and becomes a noise in the passenger compartment. There was a problem of sounding.

In particular, in recent years, there has been a strong demand to reduce noise in the passenger compartment as much as possible, and therefore, it is required to reduce noise when the claw member and the sector are engaged with each other.

FIG. 8 shows an example of a conventional parking brake operating device. This parking brake includes a sector 10 fixed to a vehicle body, a sector 10 rotatably supported by the sector 10, and a brake operating cable 12. The operating lever 14 coupled to the operating lever 14, a pawl 16 which is rotatably supported by the operating lever 14, and is a claw member that can engage with the sector 10, a knob 20 that can be retracted into a grip 18 of the operating lever 14, and this knob. It is provided with a rod 22 which is a transmission member for separating the pole 16 from the sector 10 in conjunction with the pushing of 20.

The rod 22 has a shape of the operating lever 14, a knob 20,
According to the arrangement of the pole 16 and the like, the first portion is provided via the curved portion 21a.
The rod portion 23a and the second rod portion 23b are bent and formed in a substantially V shape.
The end on the a side is fixed to the knob 20, and the end on the second rod portion 23b side is attached and fixed to the end of the pole 16.

The knob 20 is provided with a spring 26 stretched between the knob 20 and the spring locking portion 24 of the operation lever 14.
The pole 16 attached to the end of the rod 22 is biased in the projecting direction, whereby the pole 16 is pivotally biased in a direction to engage with the locking tooth 10a of the sector 10.

When the parking brake is operated, the grip 18 is gripped and the operation lever 14 is operated by the arrow 10
It is rotated by a predetermined angle along 0 in the figure upward. As a result, the brake cable 12 is tightened and the parking brake operates.

However, at this time, with respect to the rotating direction, the pole 16 moves while passing over the respective locking teeth 10a against the biasing force of the spring 26, so that the pole 16 and the locking teeth 10a intermittently move. There was a problem in that the engagement sound was continuously generated as a noise due to the engagement.

In order to solve this problem, it is effective to weaken the urging force of the spring 26 and reduce the pushing load for engaging the pole 16 with the sector 10.

However, in the conventional device, one spring 26 is used both for the return biasing of the knob 20 and the biasing engagement of the pole 16 with respect to the sector 10. Therefore, the spring 26
If the urging force is weakened, the operation feeling of the knob 20 is deteriorated, so it was not possible to reduce the pushing load below a certain level to reduce the impact sound.

Furthermore, in this type of conventional device, the pole 16 and the rod 2
2 and are directly connected. Therefore, during the operation of the lever 14, the rod 22 interlocks with the swing of the pole 16 that follows the tooth profile of the sector 10. Therefore, the pole 16 gets over the tooth 10a of the sector 10 and again
The vibrations that occur when engaging the valley between 0a
There was a problem that the system including 2 was resonated and doubled, and this was heard as unpleasant noise when the lever was operated.

In order to solve such a problem, a parking brake operating device formed as shown in, for example, FIG. 9 is also known.

In this conventional device, the pole 16 is provided with the locking tooth 1 of the sector 10.
0a and the first spring 30 and the knob 20
A second spring 26 for urging the pole 16 in a protruding direction, and the urging forces of the first and second springs 30 and 26 are independently set, so that the pole 16
It is formed so as to reduce the hitting sound caused by and to maintain a good operation feeling of the knob 20.

Further, this parking brake locks one end of the rod 22 so that a slight gap 110 remains between the pole 16 and the end of the rod 22 when the pole 16 is engaged with the sector 10. A stopper pin 32 is provided.

By doing so, the operation lever 14 is moved to the arrow 10
Even when it is rotated upward as indicated by 0, the vibration of the pole 16 is not transmitted to the rod 22 due to the setting of the gap 110, and the noise of the operation lever 14 is also shown in FIG. 8 from this surface. It is significantly smaller than.

[Problems to be Solved by the Invention] However, such a conventional device has the problems described in detail below.

(A) First, this conventional device is formed so that one end of the rod 22 is bent in a U shape and is hooked on the stopper pin 32, so that the rod 22 is held by the stopper pin 32 and the knob 20. ing.

Therefore, when assembling the stopper pin 3,
2 is caulked and fixed to the inner wall of the operating lever 14, then the second spring 26 is inserted from the opening end of the grip 18, and then the rod 22 is inserted into the operating lever 14 from the opening end of the grip 18. . At this time, this rod 22
The operation knob 20 is attached and fixed to one end side of the and the U-shaped hook portion 22b is formed on the other end side.

Then, the U-shaped hooking portion 22b of the rod 22 thus inserted is hooked on the stopper pin 32, whereby the attachment of the rod 23 is completed.

Therefore, the conventional parking brake operating device has a problem that it takes time and labor to attach the rod 22, and the assembling work of the entire device cannot be efficiently performed.

In particular, in this conventional device, it takes a lot of time to attach the U-shaped hooking portion 22 provided at the tip of the rod 22 to the stopper pin 32, and particularly the rod 22 is bent into a dogleg shape from the middle thereof. In that case, there was a problem that the mounting was difficult.

(B) In the conventional device, both ends of the rod 22 are held by using the stopper pin 32 and the operation knob 20. Therefore, for example, if the dimensions of the rod 22 are varied or the shape of the U-shaped hooking portion 22b is varied, the distance from the stopper pin 32 to the tip of the knob 20 is not constant, and further, the rod 22 If the curved portion is bent in a substantially V shape, and if the curved portion 22a is displaced and the bending angle is varied, the distance from the stopper pin 32 to the tip of the knob 20 is further varied. Will end up.

Therefore, even when the same spring 26 is used, the biasing force of the knob 20 by the spring 26 is not constant, and there is a problem that it is not possible to mass-produce parking brake operating devices having the same operation feeling. .

In order to solve such a problem, the rod 22
However, if this is done, there is a problem that the unit price of the parts will increase.

(C) Further, in this conventional device, the U-shaped hooking portion 22b formed at the end of the rod 22 is hooked on the stopper pin 32 to prevent the rod 22 from coming off by the second spring 26. Therefore, the movement of the rod 22 in the vertical and horizontal directions on the U-shaped hooking portion 22b side is not sufficiently regulated, and when the operation knob 20 is pressed, there is a problem in that the movement path of the rod 22 is likely to be shaken. there were.

Therefore, the operation feeling of the operation knob 20 is bad, and moreover, it is necessary to make a large clearance between the operation knob 20 and the grip 18 and the inner wall of the operation lever 14.
When vibration is applied from the outside, there is a problem that the operation knob 20 rattles, and noise that is harsh is generated.

The present invention has been made in view of the above conventional problems, and an object thereof is to solve the above conventional problems and to provide a parking brake operating device which has good assembly workability, small noise, and good operation feeling. To do.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an operating lever for operating a parking brake, a fixed support that rotatably supports the operating lever, and has locking teeth on the outer circumference. And a claw member that is rotatably supported by the operation lever and is urged to engage with the sector by a first spring member, and is arranged to be retractable in the grip portion of the operation lever. It has an operation knob and a bent portion formed into a predetermined shape, and is normally urged by the second spring member so that one end thereof faces the pawl member with a gap therebetween, and resists this urging force. A transmission member for rotatably displacing the claw member in a direction in which the engagement member is disengaged from the sector by pressing the operation knob; and a rotation restricting hole of a polygonal transmission member attached to the inside of the operation lever. Formed At the same time, the transmission member is slidable in the rotation restricting hole with the engaging means protruding outward from the outer surface, and with the second spring member interposed between the engaging member and the operation knob. A guide member that is inserted into and held by the transmission member; and a stopper that is provided on the transmission member and that restricts movement of the guide member. The guide member, the operation knob, the second spring member, and the transmission member are the transmission member. Second by the stopper located above
It is characterized in that the sub-assembly is assembled in a state in which the movement of the guide member by the spring material is restricted.

[Operation] As described above, according to the present invention, in the state where the second spring member is inserted between the operation knob and the guide member, the transmission member whose one end side is connected to the operation knob is the guide member. It is slidably inserted and held in the insertion hole. The transmission member is prevented from coming off by restricting its movement in the direction of the operation knob by locking the stopper to the guide member.

Therefore, according to the present invention, the guide member, the operation knob, the second spring member, and the transmission member can be formed in advance as one assembly part, and the sub-assembly responsible for this assembly part is the operation lever. By inserting it inside, the assembly can be done easily.

In particular, according to the present invention, since there is no complicated work such as hooking the end portion of the operation lever on the stopper pin as in the conventional case, the assembling workability becomes extremely good as compared with the conventional device.

Moreover, according to the present invention, by engaging the engaging means provided on the guide member included in the sub-assembly with the operation lever, the guide member is necessarily positioned, so that the assembly is facilitated. Can be converted.

Further, according to the present invention, since the guide member is slidably inserted and held in the rod insertion hole of the guide member, the pressing direction of the operation knob and the moving direction of the rod can be completely matched. Therefore, the operation knob can be operated extremely smoothly. Furthermore, since the clearance between the operating knob and the grip and the inner wall of the operating lever can be reduced, the rattling of the operating knob itself is also reduced, and this aspect also improves the operating feel of the operating knob. In addition, it is possible to suppress the generation of noise due to rattling of the operation knob.

Further, according to the present invention, since the stopper that engages with the guide member and restricts the movement of the transmission member by the second spring member is provided around the transmission member, the transmission member has some dimensional error. Even in this case, the distance between the stopper and the operation knob can always be kept substantially constant. Therefore, the force exerted by the second spring member on the operation knob is always constant, and a hand brake operating device with a uniform operation feeling of the operation knob can be mass-produced.

Moreover, according to the present invention, the above-mentioned prevention of noise generation and improvement of the operation feeling can be achieved at the time when the sub-assembly is formed, so that adjustment of each component is not necessary after the operation lever is assembled. You can save the trouble of.

[Embodiment] Next, a preferred embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a preferred example of the handbrake operating device according to the present invention.

In the apparatus of the present embodiment, the sector 40 is attached and fixed to the vehicle body 42, and the sector 40 has locking teeth 40a formed on a fan-shaped outer periphery whose center position is O ₁ .

The sector 40 is provided with an operation lever 50 which is rotatable around a rotation shaft 44 arranged at the center O ₁ . A brake cable 52 is connected to one end of the operation lever 50 on the right side of the center O ₁ , and the cable 52 is operated by the rotation of the operation lever 50.

A pole 60, which is an example of a claw member, is attached inside the operation lever 50. This pole 60
Are rotatably supported around a rotary shaft 62 provided in the operation lever 50. The pole 60 is formed in a substantially V shape, and one end thereof is a pawl 64 that engages with the locking tooth 40a of the sector 40.

Further, inside the operation lever 50, a torsion coil spring for biasing the pawl 60 in the counterclockwise direction in the drawing and pressing the pawl 64 against the locking tooth 40a of the sector 40 is provided.
It is attached as a spring 66 of.

Further, the pole 60 is formed so as to rotate clockwise against the biasing force of the first spring 66 by a pressing operation of a rod described later. A pole stopper 68 is provided inside the operating lever 50 in order to regulate the clockwise rotation range.

Further, in the present embodiment, the operation lever 50 has a shape in which the left end of the center O ₁ is formed such that the end portion inclined obliquely upward extends horizontally, and the horizontal end portion is curled in a tubular shape. A grip 54 is fitted and fixed to the horizontal tubular portion 50a.

An operation knob 56, which can be pushed, is arranged at the end of the grip 54 so as to be retractable.

A rod guide 70 is mounted and fixed in the horizontal tubular portion 50a of the operating lever 50 at a predetermined distance from the back surface of the operating knob 56.

As shown in FIG. 2, the rod guide 70 is formed by integral molding using, for example, resin, a rod insertion hole 72 is formed at the center thereof, and a pair of mounting arms are provided from both sides thereof. 74, 74 are formed to extend.

As shown in FIG. 3, a claw portion 76 is formed on the outer circumference of each of the mounting arms 74, 74, the claw portion 76 forming an engaging means projecting outward with a constant biasing force. The lever 50 is adapted to be fitted into a fitting recess (not shown) provided on the inner wall of the horizontal tubular portion 50a.

Therefore, in this embodiment, the rod guide 70 is
If the rod guide 70 is positioned by using a predetermined jig and is pushed in while being aligned from the opening side of the grip 54 into the horizontal tubular portion 50a, the claw portion 76 of the rod guide 70 is pushed when the rod guide 70 is pushed to a predetermined position. The rod guide 70 can be easily attached to the horizontal tubular portion 50a because it is fitted and locked by the snap action operation toward the fitting concave portion on the inner wall of the horizontal tubular portion 50a.

A second coil spring 58 is arranged between the back surface of the operation lever 50 and the rod guide 70 to bias the operation knob 56 to the left in FIG.

In the present embodiment, the operation knob 56 is formed of a material such as resin, and connects a rod 80 which is an example of a transmission member having one end locked in the resin.

In this embodiment, the rod 80 is bent in a dogleg shape into a first rod portion 84 and a second rod portion 86 via a curved portion 82.

The first rod portion 84 is connected to the rod guide 70.
The rod insertion hole 72 is slidably inserted, and its tip is connected to the operation knob 56 as described above.
Further, a stopper 88 is formed on the first rod portion 84, and when the rod 80 is moved leftward in the figure by the second spring 58, the stopper 88 is locked by the rod guide 70. .

The end of the second rod portion 86 normally faces the pole 60 with a gap 110. Then, by pushing the operation knob 56 against the biasing force of the second spring 58, the pole 60 is pushed clockwise so that the engagement with the sector 40 is released.

Further, the first rod portion 84 is formed as a guide regulating portion having a quadrangular cross section as shown in FIG. 4, and the rod insertion hole 72 is similarly formed as a rotation regulating hole having a quadrangular cross section. ing. Therefore, even when the rod 80 bent into a substantially V shape is used, the rod 80 causes the first rod portion 84 to move due to the vibration applied from the outside.
Since there is no so-called rocking, that is, a case where the second rod portion 86 swings in the lateral direction with the rotation axis as the rotation axis, the second rod portion 86 does not hit the inner wall of the operation lever and generate noise.

The present embodiment has the above configuration, and its operation will be described below.

In the parking brake operating device of the present invention, the stopper 88 provided on the rod 80 is locked to the rod guide 70,
The rod 80 is held by the operation knob 56 and the rod guide 70 in a state where the rod 80 is prevented from coming off by the urging force of the spring.

Therefore, as shown in FIG. 5, the rod 80 includes the operation knob 56, the rod guide 70, and the second spring 58.
In addition, it can be formed in advance as one assembly part, that is, the subassembly 200. When the sub-assembly 200 is formed as described above, the first rod 84 described above has the operation knob 56 and the rod guide 7.
By being slidably supported by 0, the pressing direction and the moving direction of the operation knob 56 are matched, and
By matching the movement direction, the operation knob 56 and the grip 5
Since the clearance with respect to 4 is also made small, it means that the operation feeling is improved and noise is prevented from occurring.

Therefore, if this subassembly 200 is positioned by using a predetermined jig and is pushed into the inside of the operation lever 50 from the opening, when the rod guide 70 is pushed to a predetermined position, the claw portion 76 thereof is pushed. Is automatically fitted and locked by a snap action operation toward the fitting recess of the inner wall of the horizontal tubular portion 50a, and the mounting of the subassembly 200 inside the operation lever 50 is completed. Thus, according to the present invention, the subassembly 2 inside the operating lever 50 is
00 can be easily and efficiently attached, and the assembly work efficiency can be significantly increased as compared with the case where each component is attached to the operation lever 50 one by one.

Further, according to the present invention, such a subassembly 2
It is preferable to form 00 as a universal type for various types of parking brake operating devices. By doing so, it is possible to increase the commonality of parts for various types of parking brake operating devices, and to operate the parking brake operating device. The cost of the device can be reduced.

Further, the subassembly 200 mounted inside the operation lever 50 in this manner holds the rod 80 by using the operation knob 56 and the rod insertion hole 72. Therefore, the operation knob 56 and the rod 80 (first rod portion 84)
The movement directions of can be perfectly matched. Therefore,
When the operation knob 56 is pressed against the biasing force of the second spring 58, the operation knob 56 moves linearly and smoothly in the axial direction of the first rod portion 84, and therefore the operation knob 56 is operated. Feeling is extremely good.

Further, according to the present invention, since the operation knob 56 moves linearly in the axial direction of the first rod portion 84, the operation knob 56
It is possible to make the clearance between the periphery of the grip 54 and the inner wall of the horizontal tubular portion 50a small. Therefore, the rattling of the operation knob 56 itself can be made small, and the operation feeling can be made good also from this aspect. Further, since the rattling of the operation knob 56 is small, it is possible to suppress the generation of noise due to the rattling of the operation knob 56 even when vibration of the vehicle is applied from the outside.

Further, according to the present invention, by providing the stopper 88 on the first rod portion 84, the protrusion amount of the operation knob 56 from the grip 54 is always constant even if the rod 80 has some shape and size errors. Can be Therefore, the urging force of the second spring 58 with respect to the operation knob 56 can always be made constant without being affected by a slight dimensional error of the rod 80, and as a result, a parking brake operation device of this type. Even in the case of mass production, it is possible to eliminate variations in the operation feeling of the operation knob 56.

The present invention is not limited to the above embodiment,
Various modified embodiments are possible within the scope of the present invention.

For example, FIG. 6 shows a second preferred embodiment of the present invention. The characteristic feature of the present invention is that the rod guide 70 is used.
A cylindrical portion 78 having an open tip is erected from the bottom surface 70a of the above, and the operation knob 56 is arranged at the tip of the cylindrical portion 78 so as to be retractable.

By forming the sub-assembly 200 in this way, the second spring 58 is covered from the outside by the tubular portion 78, so that the spring 5 is protected from an impact from the outside.
It is possible to prevent the situation in which the deformation of 8 causes the biasing force on the operation knob 56 to vary. Further, the tubular portion 78 can be accurately formed by integral molding according to the size of the operation knob 56. Therefore, the clearance between the operation knob 56 and the cylindrical portion 78 can be made smaller, and from this aspect, the operation feeling of the operation knob 56 can be improved, and the operation knob 56 can be loosened. The tsukitsuki can be small.

Further, according to this embodiment, this subassembly 200
Since the inside of the is completely covered by the tubular portion 78,
No dust or dust will enter from the outside, and the operation feeling can be improved from this aspect as well.

By the way, the subassembly 200 formed as in this embodiment can be inserted and attached from the front end opening portion of the operation lever 50 as shown in FIG. 7, for example. In addition,
In the subassembly 200 shown in the figure, instead of the claw portion 76 which is the engaging means in the first embodiment, the tip end opening portion of the tubular portion 78 is bent outward to form a locking portion 79.

Therefore, as for the attachment, the subassembly 200 is pushed inward from the opening of the tip of the operation lever 50 until the locking portion 79 is locked, and the locking portion 79 is locked at the opening end of the horizontal tubular portion 50a. After that, the grip 54 is fitted and fixed to the horizontal tubular portion 50a.

Further, in each of the above-described embodiments, the case where the rod 80 having a substantially V-shape is used has been described as an example, but the present invention is not limited to this, and the rod 80 having a shape other than this, for example, a linear shape. Needless to say, it is also applicable to.

[Effects of the Invention] As described above, according to the present invention, there is an effect that it is possible to obtain a parking brake operating device which has a good assembly work efficiency, a small noise, and a good operation feeling of the operation knob.

Particularly, according to the present invention, the transmission member, the operation knob, the second spring member and the guide member can be preformed as one assembly part, so that the work efficiency at the time of assembling the operation device is extremely high, and The work efficiency at the time of assembly can be enhanced by the easy positioning when the subassembly is inserted into the operation lever. Moreover, by making these assembled parts common to various types of parking brake operating devices, the cost can be reduced.

Further, according to the present invention, it is possible to improve the operation feeling at the time of forming the sub-assembly and prevent the generation of noise. Position adjustment and the like can be eliminated.

[Brief description of drawings]

1 is an explanatory view of a first preferred embodiment of a parking brake operating device according to the present invention, FIG. 2 is an enlarged view of a part of FIG. 1, and FIG. 3 is used for the device shown in FIG. 4 is a perspective view of a guide member to be used, FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, FIG. 5 is an explanatory view of a main part of the apparatus shown in FIG. 1, and FIGS. FIGS. 8 and 9 are explanatory views of a conventional parking brake operating device according to a second preferred embodiment. 40 ... Sector 50 ... Operating lever 54 ... Grip 56 ... Operating knob 58 ... Second spring 60 ... Pole 66 ... First spring 70 ... Rod guide 72 ... Rod insertion hole 78 ... Cylindrical part 80 ... Rod 82 ... Curved part 84 ... 1st rod part 86 ... 2nd rod part 88 ... Stopper 110 ... Gap 200 ... Sub-assembly

Claims (3)

[Scope of utility model registration request] 1. An operating lever for operating a parking brake, a fixed sector that rotatably supports the operating lever and has locking teeth on its outer circumference, and an operation lever rotatably supported by the operating lever. 1 has a claw member that is biased to engage with the sector by the spring member, an operation knob that is arranged to be retractable in the grip portion of the operation lever, and a curved portion that is bent and formed into a predetermined shape. , The second spring member is normally urged so that its one end side faces the claw member with a gap, and the claw member is engaged with the sector by pressing the operation knob against the urging force. And a transmission member for rotatively displacing in a disengaging direction, and a rotation restricting hole of a polygonal transmission member attached to the inside of the operation lever and formed in the center portion of the transmission member and projecting outward from the outer surface. Engaging means A guide member that slidably inserts and holds the transmission member in a rotation restriction hole in a state where the second spring member is inserted between the operation knob and the guide, and the guide member is provided on the transmission member. A stopper for restricting movement of the member, and the guide member, the operating knob, the second spring member and the transmission member,
Parking brake operating device, characterized in that it is a sub-assembly assembled in a state in which the movement of the guide member by the spring material of FIG. 2. The device according to claim 1 of the utility model registration, wherein the engaging means provided on the guide member is formed by a claw portion formed on the outer surface of the guide member and protruding outward. Parking brake operation device characterized by being provided. 3. An apparatus according to claim 1 of the utility model registration, wherein the engaging means provided on the guide member is a cylindrical portion whose distal end is opened from one end side of the bottom surface of the guide member. A parking brake operating device, characterized in that the parking brake operating device is formed by a locking portion that is bent outward.