JP2010274856A - Parking brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily manufacturable parking brake improving the quietness and comfort of a brake lever operation. <P>SOLUTION: The parking brake is equipped with a damper 50 having an engaging end 51 engaged/disengaged to/from teeth 31 of a rachet plate 30. The damper 50 can rock about the rocking center of a pole 40, and at least the engaging end 51 is made of synthetic resin. The engaging end 51 is separated from a claw end 41 of the pole 40 at a predetermined interval, and a distance from the rocking center is set larger than a distance from the rocking center to the claw end 41. In the damper 50 and the pole 40 rocking while a brake lever 20 is braking-operated to pull a brake cable C, the engaging end 51 of the damper 50 hits on the teeth 31 of the rachet plate 30, and then the claw end 41 hits the teeth 31 separated at a predetermined gear cutting pitch. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention pivots a base of a brake lever on a base fixed to a vehicle body so as to be able to swing, and a ratchet plate fixed to one of the base or the brake lever and a pole provided so as to swing on the other of the base or the brake lever It is related with the parking brake which locks or cancels | releases engagement with and makes the state which the brake is braking or the state which the brake of the brake released.

  In general, a conventional parking brake has a ratchet plate fixed to the vehicle side, a pole pivotally supported by the brake lever, and a blade of this pole in a direction to mesh with the teeth of the ratchet plate. When the brake lever is operated by hand, the pole swings by the action of the spring and is guided by the teeth of the ratchet plate to perform repetitive motion.

  Similarly, in a foot-operated parking brake, a ratchet plate fixed to the vehicle side, a pole pivotally supported by a brake lever provided with a pedal, and a blade tip of the pole are used as teeth of the ratchet plate. It is composed of a spring that urges in the meshing direction, and when the pedal is operated with a foot, the pole is swung by the action of the spring, guided by the teeth of the ratchet plate, and repetitively moves. In the case of such a stepping parking brake, there is a ratchet plate that is integrally fixed to the brake lever. There exists a thing as described in patent document 1 as such a stepping type parking brake. That is, it has a structure that can hold and release the braking force of the parking brake cyclically by depressing the pedal.

JP 2002-274343 A

  However, in such a conventional parking brake, the pawl repeatedly swings when the brake lever is operated. However, since the hitting sound when the pole tip hits the teeth of the ratchet plate is large, the quietness is lacking. The timbre itself is of a kind that makes the user feel uncomfortable, so there is a problem that the discomfort increases.

  As a technique for solving such a problem, an extremely thin resin coating is applied to the tip of the pole where the sound is generated or the teeth of the ratchet plate to reduce the sound and to change the tone. There is. However, in the case of such a technique, since the resin coating is applied to the portion where the hitting sound is generated, that is, the portion where the pole and the ratchet plate are engaged, there is a problem in locking the brake braking state at the time of engagement, that is, at the time of brake braking. There is concern about causing it.

  For this reason, a pole or ratchet plate with a resin coating must be manufactured with high accuracy. That is, the new problem that manufacture is difficult and manufacturing cost becomes high arises.

  Also, since the resin coating is applied very thinly, considering durability and secular change, the need for inspection and repair increases in order to maintain the effect of reducing the impact sound and changing the tone. There is.

  The present invention has been made paying attention to such problems of the prior art, and by providing a damper for buffering the hitting sound, the hitting generated between the ratchet plate and the ratchet plate by the repeated swinging motion of the pole. An object of the present invention is to provide a parking brake that can reduce noise and improve timbre, improve quietness and comfort during operation of the brake lever, and is easy to manufacture.

The gist of the present invention for achieving the object lies in the inventions of the following items. [1] The base (21) of the brake lever (20) is pivotally supported on the base (10) fixed to the vehicle body, and is fixed to either the base (10) or the brake lever (20). Lock or lock the engagement between the ratchet plate (30) and the base (10) or the pawl (40) swingably provided on the brake lever (20) where the ratchet plate (30) is not fixed. The brake cable (C) connected to the brake lever (20) is pulled and locked in a state where the brake is braked, or the brake is released so that the brake cable (C) is not pulled. In the parking brake designed to
A swingable damper (50) having an engagement end (51) that engages and disengages with the teeth (31) of the ratchet plate (30), and whose swing center is concentric with the swing center of the pole (40). Prepared,
The damper (50) has at least the engagement end (51) made of synthetic resin,
An engagement end (51) of the damper (50) is separated from a claw end (41) of the pole (40) engaged with and disengaged from a tooth (31) of the ratchet plate (30), and the The distance from the swing center is larger than the distance from the swing center to the claw end (41),
While the brake lever (20) is operated so as to pull the brake cable (C) to brake the brake, the swinging damper (50) and the pawl (40) are connected to the damper (50). The parking end characterized in that the engaging end (51) hits the tooth (31) of the ratchet plate (30), and then the claw end (41) hits the tooth (31) separated by the predetermined gear cutting pitch. brake.

[2] The base (21) of the brake lever (20) is pivotally supported by the base (10) fixed to the vehicle body, and fixed to either the base (10) or the brake lever (20). Lock or lock the engagement between the ratchet plate (30) and the base (10) or the pawl (40) swingably provided on the brake lever (20) where the ratchet plate (30) is not fixed. The brake cable (C) connected to the brake lever (20) is pulled and locked in a state where the brake is braked, or the brake is released so that the brake cable (C) is not pulled. In the parking brake designed to
A swingable damper (50a) having a contact end portion (51a) that contacts the teeth (31) of the ratchet plate (30) and whose swing center is concentric with the swing center of the pole (40). Prepared,
The damper (50a) has at least the contact end portion (51a) made of a synthetic resin,
The contact end portion (51a) of the damper (50a) is separated from the claw end (41) of the pole (40) engaged with and disengaged from the teeth (31) of the ratchet plate (30), and A distance from the swing center is larger than a distance from the swing center to the claw end (41);
While the brake lever (20) is operated so as to pull the brake cable (C) to brake the brake, the swinging damper (50a) and the pawl (40) are connected to the damper (50a). The contact end portion (51a) hits and contacts the tooth (31) of the ratchet plate (30), and then the claw end (41) hits the tooth (31) separated by the predetermined gear cutting pitch. Features a parking brake.

[3] The parking brake according to [1] or [2], wherein the predetermined interval is one gear cutting pitch of the teeth (31) of the ratchet plate (30).

[4] The parking brake according to [1] or [2], wherein the predetermined interval is a plurality of gear cutting pitches of the teeth (31) of the ratchet plate (30).

[5] The parking brake according to any one of [1] to [4], wherein the damper (50, 50a) is provided on the pole (40).

The present invention operates as follows.
The brake lever (20) of the parking brake is operated so as to pull the brake cable (C) in order to brake the brake. While performing this operation, the pawl (40) is moved while the engaging end (51) formed on the pawl end (41) and the damper (50) successively contacts the teeth (31) of the ratchet plate (30). Swing.

  When the pole (40) and the damper (50) are in contact with the teeth (31) of the ratchet plate (30) one after the other, the engagement end (51) of the damper (50) comes before the claw end (41). It hits the teeth (31) of the ratchet plate (30). This is because the distance from the swing center to the engagement end (51) is larger than the distance from the swing center to the claw end (41).

  When the engagement end (51) of the damper (50) first hits the tooth (31) of the ratchet plate (30), the engagement end (51) is made of synthetic resin, so that the generated hitting sound is small, and Most of the shock is absorbed. Further, the timbre of the hitting sound is not unpleasant unlike the sound generated by the collision between metals.

  When the engaging end (51) hits the tooth (31) of the ratchet plate (30), the claw end (41) hits the other tooth (31) of the ratchet plate (30). For example, the engagement end (51) and the claw end (41) of the damper (50) are one gear-cutting pitch of the ratchet plate (30) on the swing surface on which the pole (40) and the damper (50) swing. In the case of being separated, the claw end (41) hits the tooth (31) adjacent to the tooth (31) hit by the engagement end (51). In addition, when the engagement end (51) and the claw end (41) of the damper (50) are separated from each other by two gear cutting pitches, the teeth from the tooth (31) hit by the engagement end (51) The nail end (41) hits the adjacent tooth (31) on which one (31) is placed.

  If the operation of the brake lever (20) is continued, the claw end (41) gets over the teeth (31) of the ratchet plate (30) that is in contact. Subsequently, the engagement end (51) of the damper (50) gets over the teeth (31) of the ratchet plate (30). After the engagement end (51) gets over the tooth (31) of the ratchet plate (30), the engagement end (51) first hits the next tooth (31) as described above, and then the claw end ( 41) hits the next tooth (31).

  When the operation is stopped when the brake lever (20) reaches a substantially predetermined position, the brake lever (20) is slightly pulled in the direction opposite to the operation direction by being pulled by the braking reaction force applied to the brake cable (C). Returning, the pawl end (41) and the engagement end (51) of the pole (40) mesh with the teeth (31) of the ratchet plate (30), respectively. As a result, the brake cable (C) is pulled to lock the brake.

  Thus, the hitting sound generated when the pawl end (41) hits the teeth (31) of the ratchet plate (30) during operation of the brake lever (20) is reduced, and the engagement end of the damper (50) is reduced. The hitting sound generated when (51) hits the teeth (31) of the ratchet plate (30) is not unpleasant and is small, and further, the impact when the engaging end (51) hits the teeth (31). Is almost absorbed, so that the hitting sound generated when the claw end (41) hits the teeth (31) of the ratchet plate (30) is extremely small, and therefore when the brake lever (20) is operated. The quietness and comfort will be improved.

  If the damper (50a) has a contact end (51a) that contacts the teeth (31) of the ratchet plate (30) instead of the engagement end (51), the brake is braked. When the operation of the brake lever (20) continues and the pawl (40) comes into contact with the teeth (31) of the ratchet plate (30) one after the other, first, the contact end (51a) of the damper (50a) Hits the teeth (31) of the ratchet plate (30). When the contact end portion (51a) of the damper (50a) first hits the tooth (31) of the ratchet plate (30), the contact end portion (51a) is made of synthetic resin, so that the generated hitting sound is small. And most of the shock is absorbed. Further, the timbre of the hitting sound is not unpleasant unlike the sound generated by the collision between metals.

  When the contact end portion (51a) hits and contacts the teeth (31) of the ratchet plate (30), the claw end (41) subsequently contacts the other teeth (31) of the ratchet plate (30).

  If the operation of the brake lever (20) is continued, the claw end (41) gets over the teeth (31) of the ratchet plate (30) that is in contact. Before the claw end (41) that has passed over the tooth (31) of the ratchet plate (30) hits the next tooth (31), the abutting end (51a) first hits the next tooth (31), followed by The nail end (41) hits the tooth (31).

  When the operation is stopped when the brake lever (20) reaches a substantially predetermined position, the brake lever (20) is slightly pulled in the direction opposite to the operation direction by being pulled by the braking reaction force applied to the brake cable (C). Returning, the pawl end (41) of the pole (40) engages with the teeth (31) of the ratchet plate (30), and the brake cable (C) is pulled to lock the brake. .

  As a result, the effect of improving the quietness and comfort can be obtained as in the case where the damper (50a) has the engagement end (51).

  According to the parking brake of the present invention, since the distance from the swing center to the engagement end of the damper is larger than the distance from the swing center to the pawl end of the pole, the engagement end of the damper is in contact with the teeth of the ratchet plate. After the contact, the pawl end of the pole hits the other teeth of the ratchet plate, and the impact when the engaging end of the damper hits the teeth of the ratchet plate is almost absorbed by the engaging end made of synthetic resin. In addition, the hitting sound caused by the contact between the engaging end and the ratchet plate teeth is small, and the tone is not unpleasant, and when the pawl end of the pole hits the ratchet plate tooth, Since the shock is almost absorbed, the hitting sound generated when the pawl end of the pole hits the teeth of the ratchet plate is extremely small, and the operation of the brake lever It is possible to improve the quietness and comfort of the.

  Further, since the damper does not require high precision, it is easy to manufacture.

  Furthermore, in the case where the engagement end of the damper is located at a position separated from the pawl end of the pole by a plurality of gear cutting pitches, the difference in moving distance between the engagement end and the end of the pawl end can be greatly increased, so the wear allowance due to repeated operation is reduced. Especially effective when large.

  Similarly, in the case of having a contact end that abuts against the teeth of the ratchet plate instead of the engagement end of the damper, the distance from the swing center to the contact end of the damper is the same as the pole from the swing center. Since the distance between the end of the damper hits the teeth of the ratchet plate and the contact ends of the pole hit the other teeth of the ratchet plate, the damper's synthetic resin Because the impact is absorbed when the contact end of the ratchet collides with the teeth of the ratchet plate, the hitting sound caused by the contact between the contact end and the teeth of the ratchet plate is small, and the tone is not unpleasant. When the end of the nail hits the teeth of the ratchet plate, the impact is already absorbed by the damper, so the hitting sound is low, so the quietness and comfort when operating the brake lever It is possible to improve the.

It is a figure which shows the structure of the parking brake which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the ratchet plate in FIG. 1, a pole, and its peripheral member. It is a perspective view which shows the pole and damper in FIG. FIG. 6 is a simplified diagram showing, in a simplified manner, an example of the state of the ratchet plate and the pawl and their surrounding members during braking operation of the brake lever. FIG. 5 is a simplified diagram showing a state of a ratchet plate, a pawl, and peripheral members when the braking operation of the brake lever is further advanced from the state of FIG. 4. FIG. 6 is a simplified diagram showing the state of the ratchet plate, the pawl, and the surrounding members when the braking operation of the brake lever is further advanced from the state of FIG. 5. FIG. 7 is a simplified diagram showing the state of the ratchet plate, the pawl, and the surrounding members when the braking operation of the brake lever is further advanced from the state of FIG. 6. FIG. 8 is a simplified diagram showing the state of the ratchet plate, the pole, and the surrounding members when the braking operation of the brake lever is further advanced from the state of FIG. 7. FIG. 6 is a simplified diagram showing a state when the brake pawl position is in a state where the pawl end of the pawl and the engagement end of the damper are engaged with the teeth of the ratchet plate and the braking force is applied. It is an enlarged view which expands and shows the state of the nail | claw end of a pole in the state of FIG. 8, the engagement end of a damper, and the tooth | gear of a ratchet plate. It is explanatory drawing explaining an example of the space | interval of the nail | claw end of a pole, and the engagement end of a damper. It is a perspective view which shows the ratchet plate and pole of a parking brake which concern on the 2nd Embodiment of this invention, and its peripheral member. It is a perspective view which shows the example which implemented this invention with the lever-type parking brake. It is a perspective view which shows the pole and damper in FIG.

Hereinafter, various preferred embodiments of the present invention will be described with reference to the drawings.
1 to 11 show a first embodiment of the present invention.
As shown in FIG. 1, the parking brake in the present embodiment is a stepping type, and a base 21 of a brake lever 20 is pivotally supported by a pivot A1 on a base 10 fixed to the vehicle body.

  As shown in FIG. 1, a brake cable C is connected to the base portion 21 of the brake lever 20 via a connector C1. On the other hand, a tip 23 of the brake lever 20 is provided with a pedal 23 on which a foot is placed when the brake lever 20 is operated. When the pedal 23 is depressed, the base 21 connects the brake cable C on the paper surface. Pull the brake clockwise to apply the brake.

  As shown in FIGS. 1 and 2, a ratchet plate 30 is fixed to the edge of the base 21 of the brake lever 20. On the periphery of the ratchet plate 30, a plurality of teeth 31 forming a tooth shape in the circumferential direction about the pivot A1 are formed.

  A metal pole 40 is disposed on the base 10 side facing the teeth 31. The pole 40 has a claw end 41 that engages with and disengages from the teeth 31 of the ratchet plate 30. The pawl 40 has a damper for reducing the hitting sound and generating an unpleasant hitting sound by hitting the ratchet plate 30 just before the pawl end 41 hits the teeth 31 of the ratchet plate 30 to absorb the shock. 50 is provided.

  As shown in FIGS. 2 and 3, the damper 50 is formed by molding a synthetic resin material so as to be integrated with the pole 40 by molding, and the ratchet plate is located at a predetermined distance from the claw end 41 of the pole 40. It has an engagement end 51 that engages with and disengages from the 30 teeth 31. The engagement end 51 is formed in substantially the same shape as the claw end 41. The synthetic resin damper 50 reaches the vicinity of the engagement end 51 in order to reinforce the pole 40. In the example illustrated as the present embodiment, most of the pole 40 is covered with the damper 50 except for the claw end 41 and the vicinity thereof.

  The pole 40 and the damper 50 are provided with a common long hole 42 at the center thereof. A support pin A2 fixed to the base 10 is inserted into the elongated hole 42, and the pole 40 and the damper 50 are supported by the support pin A2 so as to be swingable around the support pin A2. The support pin A <b> 2 is a swing center common to the pole 40 and the damper 50. The support pin A2 can move relatively from the upper end edge 42a to the lower end edge 42b of the elongated hole 42 while abutting against the inner peripheral edge of the elongated hole 42.

  That is, the pawl 40 and the damper 50 are clawed to the first position which is the so-called operation position during the braking operation of the brake lever 20 shown in FIGS. 4 to 8 and the teeth 31 and 31 of the ratchet plate 30 shown in FIG. The end 41 and the engagement end 51 can be engaged and moved while swinging to a second position which is a braking holding position where a braking force is applied.

  A biasing member 60, which is a coil spring, is disposed facing the tail end of the pole 40 and the damper 50, and the biasing member 60 has a ratchet 41 at the second position (braking holding position). The pole 40 is urged in the direction away from the teeth 31 of the plate 30, while the pole 40 is urged in the first position (operating position) in the direction in which the pawl end 41 of the pole 40 meshes.

  That is, the urging member 60 has a coil portion 61 and leg portions 62, 63 urged in the leg opening direction, and the engaging end 62 a of the leg portion 62 is engaged with the engaging hole 12 formed in the base 10. The engagement end 63 a of the leg portion 63 is engaged with the notch groove 43 at the tail end of the pole 40.

  As apparent from FIGS. 4 to 8, in the first position (operating position), the line of action connecting the engaging ends 62a and 63a is on the same side as the pawl end 41 of the pole 40 with respect to the support pin A2. As can be seen from FIG. 9, at the second position (braking holding position), the action line d connecting the engagement ends 62a and 63a is disposed on the opposite side of the claw end 41 with respect to the support pin A2.

  When the brake lever 20 is stepped on in the first position (operating position), the pawl 40 and the damper 50 are moved to the teeth 31 and 31 of the ratchet plate 30 by the urging force of the urging member 60 and the pawl end 41 and the damper 50 of the pawl 40. The engagement ends 51 of the two are elastically engaged and disengaged one after another. At this time, the engaging end 51 hits the tooth 31 first, and then the claw end 41 hits the tooth 31.

  When the depression of the brake lever 20 is stopped, the brake lever 20 is pulled back to the non-braking state by the brake cable C to which the braking reaction force is applied. At this time, the claw end 41 and the engagement end 51 are pushed by the teeth 31, 31 of the ratchet plate 30 by the urging force of the urging member 60, thereby causing the second position (the engagement end 51 and the claw to move from the first position (operation position)). The end 41 is displaced to a braking holding position that maintains the engaged state with the teeth 31 and 31, respectively.

  When the brake lever 20 in the braking state is stepped on again, the pawl 40 and the damper 50 are separated from the teeth 31 and 31, and the pawl end 41 and the engagement end 51 are moved to the teeth 31 and 31 by the urging force of the urging member 60. And the brake lever 20 is swung to the non-braking holding position for releasing the brake. When the brake lever 20 returns to the braking release state, the pole 40 and the damper 50 are displaced from the non-braking holding position to the first position (operating position). In this way, the pole 40 and the damper 50 are arranged.

  As described above, when the brake lever 20 is depressed, the claw end 41 and the engagement end 51 are engaged with and disengaged from the teeth 31 and 31 one after another. At this time, the engagement end 51 first hits the tooth 31 and then the claw end. 41 is configured to come into contact with the tooth 31. A configuration for performing such an operation will be described below with reference to FIG. In addition, what was shown with the dashed-two dotted line in FIG. 10 is the pole 40 and the damper 50 in FIG.

  The pawl end 41 of the pole 40 and the engagement end 51 of the damper 50 are arranged so that each track is on the same swinging surface when the pole 40 (and the damper 50) swings. The claw end 41 and the engagement end 51 are arranged with a predetermined interval. In the example illustrated in FIG. 10, the predetermined interval is one gear cutting pitch of the ratchet plate 30, but may be two gear cutting pitches as illustrated in FIG. 11, More than that.

  In this way, the claw end 41 and the engagement end 51 arranged at a predetermined interval are the swing center (instantaneously “rotation center”) of the pole 40 and the damper 50. The distance from) is different. The pole 40 and the damper 50 have the same rotation center (concentric), and the axis of the support pin A2 is the rotation center.

  As shown in FIG. 10, the distance from the rotation center to the claw end 41 and the distance from the rotation center to the engagement end 51 are set such that the distance to the engagement end 51 is greater. Here, if the distance from the rotation center to the tip of the pawl end 41 of the pole 40 is 7r, the distance from the rotation center to the tip of the engagement end 51 of the damper 50 is 8r, and the rotation angle of the pole 40 is θ, The moving distance of the tip of the claw end 41, that is, the length of the arc of the locus drawn by the tip of the claw end 41 is 7r × θ, and similarly, the moving distance of the tip of the engaging end 51 is 8r × θ. Here, since 7r <8r, 7r × θ <8r × θ. That is, when the engagement end 51 of the damper 50 hits the tooth 31 of the ratchet plate 30, the pawl end 41 of the pole 40 has not yet hit the tooth 31 of the ratchet plate 30, and There is a gap s between them.

  This gap s is caused by the difference in the moving distance between the tips of the claw ends 41 and the engaging ends 51. When the brake lever 20 is further depressed from this state, the brake lever 20 moves in a direction in which the tooth 31 approaches the claw end 41 and eliminates the gap s, so that the claw end 41 hits the tooth 31. Accordingly, the engaging end 51 and the tooth 31 strike with force so as to collide, but the claw end 41 and the tooth 31 do not collide but contact with the claw end 41 and the tooth 31.

  When the depression of the brake lever 20 continues, the claw end 41 and the engagement end 51 get over the teeth 31 and 31 and hit the next teeth 31 and 31, respectively. At this time, the engagement end 51 hits the tooth 31 before the claw end 41 as described above, and the impact is almost absorbed, so that the claw end 41 subsequently contacts the tooth 31 when it abuts. The hitting sound generated is much smaller than the hitting sound generated when the pawl end of the pole suddenly collides with the teeth of the ratchet plate in the prior art.

Next, the operation will be described.
4 to 8 show the relative motion of the ratchet plate 30, the pole 40, and the damper 50 in the process of depressing the brake lever 20 to brake the brake. That is, the state when the pole 40 and the damper 50 are in the operating position is shown. 4 is a state explanatory view showing the state of the ratchet plate 30, the pole 40 and the damper 50 before the brake pedal 23 in FIG. 1 is depressed. FIGS. 5 to 8 show the state of the brake pedal 23 from the state of FIG. Is a state explanatory view showing a state in which the pawl end 41 of the pole 40 and the engagement end 51 of the damper 50 get over the teeth 31 of the ratchet plate 30, and FIG. It shows the state when there is.

  When a force is applied to the pedal 23 at the distal end portion 22 of the brake lever 20, the base portion 21 of the brake lever 20 swings with respect to the base 10, and the base portion 21 is displaced to be connected to the brake lever 20 by the connector C1. The brake cable C is pulled to brake the brake.

  That is, when the brake lever 20 is in the brake release state and the pawl 40 is in the operating position, when the pedal 23 of the distal end portion 22 of the brake lever 20 is depressed, the brake lever 20 rotates clockwise in FIG. Is displaced. Accordingly, as shown in FIG. 5, the ratchet plate 30 fixed to the base 21 and having teeth 31 formed on the periphery thereof is also displaced, and the poles 40 that are elastically pressed against the teeth 31 of the ratchet plate 30 are displaced. The claw end 41 and the engagement end 51 of the damper 50 move over the teeth 31 as shown in FIGS.

  The pawl end 41 of the pawl 40 and the engagement end 51 of the damper 50 are swung while the teeth 31 of the ratchet plate 30 contact each other until the operation of the brake lever 20 is stopped at a desired position. Since the distance from the swing center to the engagement end 51 is larger than the distance from the swing center to the claw end 41 as described above, when the pole 40 and the damper 50 are in contact with the teeth 31 of the ratchet plate 30 one after another. The engaging end 51 of the damper 50 contacts the teeth 31 of the ratchet plate 30 before the claw end 41 of the pole 40.

  When the brake lever 20 is stepped on, the ratchet plate 30 fixed to the brake lever 20 rotates in the clockwise direction on the paper surface of FIG. FIG. 5 shows a state where the brake lever 20 is depressed from the state of FIG. 4 and the uppermost tooth 31 of the ratchet plate 30 first contacts the pawl end 41 of the pole 40. At this time, the long hole 42 penetrating the pole 40 and the damper 50 moves relative to the support pin A2, and the lower end edge 42b of the inner periphery thereof is in contact with the support pin A2. Thereby, the pole 40 is urged | biased clockwise by the effect | action of the urging | biasing force of the coil part 61 on the paper surface of FIG.

  When the brake lever 20 is further depressed from this state, the claw end 41 gets over the uppermost tooth 31 of the ratchet plate 30 with which the ratchet plate 41 first contacts. At this time, the pole 40 is pushed by the teeth 31 and moved counterclockwise against the urging force of the coil portion 61, so that the second tooth 31 is strongly struck by the urging force of the coil portion 61. However, the engaging end 51 of the damper 50 contacts the uppermost tooth 31 of the ratchet plate 30 immediately before the claw end 41 contacts the second tooth 31. Since the engaging end 51 is made of synthetic resin, it almost absorbs the impact well when it hits the teeth 31 and the hitting sound generated at this time is small. Further, the tone color of this hitting sound is not unpleasant compared to the hitting sound when metal hits each other. When the engaging end 51 hits the tooth 31, the shock is absorbed immediately before the claw end 41 hits the second tooth 31. Therefore, when the claw end 41 hits the second tooth 31, the impact received is small and thus occurs. The hitting sound is also small. Thus, the operation in which the engagement end 51 hits the tooth 31 immediately before the claw end 41 hits the tooth 31 continues during the operation of stepping on the brake lever 20.

  In this operation, the claw end 41 and the engaging end 51 ride on the teeth 31 and 31 as shown in FIG. 6 following the state in which the claw end 41 and the engaging end 51 are engaged with the teeth 31 and 31. 7, after the claw end 41 and the engagement end 51 have passed over the teeth 31 and 31 as shown in FIG. 7, the engagement end 51 comes before the claw end 41 as shown in FIG. The state hitting the tooth 31, that is, the state shown in FIG.

  When the force applied to the pedal 23 at the tip 22 of the brake lever 20 is stopped from the state shown in FIG. 8 and the brake lever 20 is released, the brake cable C pulled by the braking reaction force pulls the brake lever 20 back. Trying to swing counterclockwise. At this time, since the engaging end 51 is engaged with the teeth 31 of the ratchet plate 30, the pole 40 and the damper 50 also move together with the ratchet plate 30. Accordingly, the gap s between the pawl end 41 of the pole 40 and the tooth 31 of the ratchet plate 30 shown in FIG. 10 is eliminated, and the pawl end 41 and the tooth 31 are brought into contact with each other and engaged.

  The urging direction of the urging member 60 is reliably switched at the neutral position while the elongated hole 42 is guided by the support pin A2 and moved to the second position (braking holding position). 9, the braking reaction force from the brake cable C is maintained by receiving the pin A <b> 2 at the upper end edge 42 a of the long hole portion 42. Thus, when the long hole portion 42 is guided to the pin A2 and the pole 40 and the damper 50 are moved to the second position, the direction of the acting line of the urging force of the urging member 60 is changed, and the pole 40 is counterclockwise, that is, It is biased in the direction in which the engagement is released. However, the pole 40 is restrained from moving in the direction in which the engagement with the meshing resistance with the ratchet plate 30 is released, and thus the braking state of the brake is locked.

  The locked state of the brake can be released by stepping on the brake lever 20 again to remove the meshing resistance between the pole 40 and the ratchet plate 30.

  As described above, the hitting sound generated when the pawl end 41 hits the teeth 31 of the ratchet plate 30 during operation of the brake lever 20 is small, and when the engaging end 51 of the damper 50 hits the teeth 31 of the ratchet plate 30. The generated hitting sound is not unpleasant and small, and the claw end 41 hits the tooth 31 of the ratchet plate 30 immediately after the hitting sound by the engagement end 51 and the tooth 31 of the ratchet plate 30 is generated. The effect that the hitting sound generated at that time is mixed with the hitting sound of the engaging end 51 and the teeth 31 is added, thereby improving the quietness and comfort during the operation of the brake lever 20. In addition, the manufacture of the damper is easy because it does not require high precision.

FIG. 12 shows a second embodiment of the present invention.
As shown in FIG. 12, in the present embodiment, the damper 50a has a contact end portion 51a that contacts the tooth 31 of the ratchet plate 30 instead of the engagement end 51 of the damper 50 in the first embodiment. It is what I did. In the first embodiment, the engagement end 51 is engaged with the teeth 31 of the ratchet plate 30. However, in this embodiment, the contact end portion 51 a hits the tip of the teeth 31 of the ratchet plate 30. The point of contact is different from the first embodiment. Since the configuration other than this is the same as that of the parking brake in the first embodiment, the same members and parts as those in the parking brake in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. .

  The contact end portion 51a of the damper 50a is located at a position away from the claw end 41 of the pole 40 that engages and disengages with the teeth 31 of the ratchet plate 30 like the engagement end 51, and the swing of the pole 40 and the damper 50a. The distance from the center is larger than the distance from the swing center to the claw end 41.

  Also in this case, when the operation of the brake lever 20 for braking the brake continues and the pawl 40 and the damper 50a successively contact the teeth 31 of the ratchet plate 30, first, the contact end 51a of the damper 50a is After hitting and contacting the teeth 31 of the ratchet plate 30, the pawl end 41 of the pole 40 hits the teeth 31. Therefore, when the claw end 41 hits the tooth 31, the impact is almost absorbed by the abutting end portion 51 a, and the hitting sound generated when the claw end 41 hits the tooth 31 is extremely small. . Further, the hitting sound generated when the contact end portion 51a, which is a synthetic resin, hits the metal teeth 31, is smaller than the hitting sound generated when the metals hit each other, and the tone of the hitting sound hits the metals. Unlike the sound that is generated, it is not unpleasant. Thereby, the effect which improves silence and comfort similarly to the case where the damper 50 has the engagement end 51 can be acquired.

  In addition, the location where the contact end portion 51 a first hits the tip of the tooth 31 of the ratchet plate 30 and the claw end 41 are arranged at a predetermined interval. This predetermined interval is the same as the predetermined interval between the engagement end 51 and the claw end 41 in the first embodiment, and corresponds to one gear cutting pitch of the ratchet plate 30, but is equal to two gear cutting pitches. It may be more than that.

  Although the stepping type parking brake has been described above, the present invention can also be applied to a lever type parking brake in which the brake lever 20A is operated with a hand as shown in FIG. As shown in the drawing, the base 10A is fixed to the vehicle body, and the base of the brake lever 20A is pivotally supported by the base 10A so as to be able to swing. The ratchet plate 30A is fixed to the base 10A. On the other hand, a pole 40A is swingably provided on the brake lever 20A.

  As shown in FIG. 14, a damper 50A made of synthetic resin is formed on the pole 40A so as to be integrated with the pole 40A by molding. A through hole 42A is formed in the pole 40A and the damper 50A. A support pin (not shown) fixed to the brake lever 20A is inserted into the through hole 42A, and the pole 40A and the damper 50A are supported by the support pin and can swing around the support pin. it can.

  The operation and effect of the parking brake according to the present embodiment having such a configuration is the same as the operation and effect of the parking brake according to the first embodiment described by exemplifying the stepping type parking brake.

  Widely applied to mechanisms that have a structure that engages and disengages with the ratchet plate by repeated swinging motion of the pole, reducing the sound generated between the pole and the ratchet plate during repeated swinging motion of the pole and reducing the timbre Can be improved.

A1 ... Pivot A2 ... Support pin C ... Brake cable C1 ... Connector s ... Gap 10,10A ... Base 12 ... Engagement hole 20,20A ... Brake lever 21 ... Base 22 ... Tip 23 ... Pedal 30,30A ... Ratchet plate 31 ... Teeth 40, 40A ... Pole 41 ... Claw end 42 ... Elongate hole 42a ... Upper edge 42A ... Through hole 42b ... Lower end edge 43 ... Notch groove 50, 50a, 50A ... Damper 51 ... Engagement end 51a ... Contact end 60 ... Biasing member 61 ... Coil portion 62, 63 ... Leg portion 62a, 63a ... Engagement end

Claims (5)

A base of a brake lever is pivotally supported on a base fixed to a vehicle body, and a ratchet plate fixed to either the base or the brake lever and the ratchet plate of the base or the brake lever are fixed. Lock or release the engagement with the pole that can swing on the other side and lock the brake cable connected to the brake lever so that the brake is braking, or pull the brake cable. In the parking brake that is set to the brake release state that is not applied,
It has an engagement end that engages and disengages with the teeth of the ratchet plate, and includes a swingable damper whose swing center is concentric with the swing center of the pole,
The damper has at least the engagement end made of a synthetic resin,
The engagement end of the damper is separated from the pawl end of the pole that engages and disengages with the teeth of the ratchet plate, and the distance from the swing center is the distance from the swing center to the pawl end. Bigger than
The damper and the pole swinging while the brake lever is operated to pull the brake cable to brake the brake, the engaging end of the damper hits the teeth of the ratchet plate, and then the A parking brake, wherein a claw end abuts against a tooth separated by the predetermined gear cutting pitch. A base of a brake lever is pivotally supported on a base fixed to a vehicle body, and a ratchet plate fixed to either the base or the brake lever and the ratchet plate of the base or the brake lever are fixed. Lock or release the engagement with the pole that can swing on the other side and lock the brake cable connected to the brake lever so that the brake is braking, or pull the brake cable. In the parking brake that is set to the brake release state that is not applied,
It has a contact end that contacts the teeth of the ratchet plate, and includes a swingable damper whose swing center is concentric with the swing center of the pole,
The damper has at least the abutting end portion made of synthetic resin,
The contact end portion of the damper is separated from the pawl end of the pole engaged with and disengaged from the teeth of the ratchet plate, and the distance from the swing center is from the swing center to the pawl end. Greater than the distance,
While the brake lever is operated to pull the brake cable in order to brake the brake, the swinging damper and the pawl abut against the teeth of the ratchet plate at the abutting end of the damper. The parking brake is characterized in that, thereafter, the claw end comes into contact with a tooth separated by the predetermined gear cutting pitch.   The parking brake according to claim 1 or 2, wherein the predetermined interval is one gear cutting pitch of the ratchet plate.   The parking brake according to claim 1 or 2, wherein the predetermined interval is a plurality of gear cutting pitches of the ratchet plate.   The parking brake according to any one of claims 1 to 4, wherein the damper is provided on the pole.

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