CN207178543U - A kind of wear indicating device for disk brake - Google Patents

Abstract

The utility model provides a kind of wear indicating device for disk brake, belongs to field of mechanical technique.It is inconvenient that it solves the problems, such as that existing wear indicating device dismounts with disk brake.It includes on-off type switch, guide rod, trigger mechanism and shell, guide rod and on-off type switch may be contained within shell and guide rod can move axially relative to shell, the outer end of guide rod is stretched out outside shell, the part that shell is stretched out in guide rod is arranged with spring, the inner of spring is acted on shell, on the guide bar, when guide rod moves setpoint distance to the direction for stretching out shell, trigger mechanism can trigger on-off type switch for the outer end effect of spring.It has the advantages that dismounting convenience is high, can depart from disk brake and sold separately.

Description

A kind of wear indicating device for disk brake

Technical field

The utility model belongs to field of mechanical technique, is related to a kind of wear indicating device for disk brake.

Background technology

Disk brake is a kind of brake more conventional in current middle-and-high-ranking commercial car, two frictions in brake Pad is separately positioned on the both sides of brake disc, and braking is realized by rubbing after being press respectively against by two lining pads in brake disc.By In realizing braking by friction, lining pad just occurs after frequent use to wear and causes between lining pad and brake disc There is brake clearance, time during braking can be extended with the increase of brake clearance, therefore in existing disk brake Brake clearance auto-adjusting mechanism will be set to adjust brake clearance.But when the abrasion of lining pad oversteps the extreme limit attrition value, It can not be made up by self-adjusting mechanism, now just need the lining pad more renewed.The lining pad more renewed for when, All it is to be observed by the personal driving experience or naked eyes of driver in tradition, but this mode time delay is larger.

In order to solve the above problems, Chinese patent is it is proposed that excessively a kind of wear indicating device [Shen for disk brake Please number：201420448432.4], disk brake includes brake casing and self-regulated gear, and wear indicating device includes positioning Arm, adjustment arm, wear indicator and adjustment bolt, self-regulated gear engage with an adjustment gear, adjustment axle shaft end and adjustment gear Interference fit, registration arm are connected with adjustment axle thread, and registration arm can produce upper and lower displacement, adjustment axle and system with the rotation of adjustment axle Coordinated between dynamic device housing using bearing pin, adjustment bolt is installed in registration arm, adjustment bolt and wear indicator coaxial line and Adjustment bolt and the distance between wear indicator are adjustable, and wear indicator is fixedly connected with brake casing, wear indicator Lower end is provided with a long make and break and closed, wear indicator upper end connection vehicle circuit.With the mill of the lining pad on disk brake Damage, self-regulated gear is rotated to compensate the abrasion of lining pad, so as to drive adjustment pinion rotation, is interference fitted in adjustment gear Adjustment axle together will drive registration arm to move upwards so as to adjust with adjustment pinion rotation due to adjusting the rotation of axle The distance between whole bolt and wear indicator diminish, when lining pad may wear to the limit, adjustment bolt touching wear indicator The long make and break of lower end is closed and wear indicator is powered and connect vehicle circuit, finally sends warning in driver's cabin by vehicle circuit Signal prompt changes lining pad.

Although the above-mentioned wear indicating device for disk brake can send police when lining pad may wear to the limit Show signal prompt change lining pad, but it there is also certain weak point：Each parts of the wear indicating device Location arrangements obtain more dispersed, integrated level is relatively low, cumbersome when being assembled on disk brake, it is necessary to by each parts It is individually connected to one by one on disk brake；In addition, though wear indicating device is all mounted in the enterprising enforcement of disk brake , but the reason for each parts arrangement is scattered is also due to, cause the wear indicating device to be mounted in disk brake Upper carry out integrated marketing, and can not be sold separately.

The content of the invention

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, it is proposed that one kind is used for disk brake Wear indicating device, technical problem to be solved is that the dismounting for how improving wear indicating device and disk brake facilitates Property.

The purpose of this utility model can be realized by following technical proposal：

A kind of wear indicating device for disk brake, including on-off type switch, guide rod and trigger mechanism, its It is characterised by, wear indicating device also includes shell, and described guide rod and on-off type switch may be contained within shell and be oriented to Bar can move axially relative to shell, and the outer end of described guide rod is stretched out outside shell, stretch out the part of shell in guide rod Be arranged with spring, the inner of spring is acted on shell, the effect of the outer end of spring on the guide bar, when guide rod is to stretching out shell Direction movement setpoint distance when trigger mechanism can trigger on-off type switch.

When wear indicating device is connected on disk brake, shell is fixed to disk brake by fastener Housing on, and ensure that the outer end of guide rod is resisted against on the part that can be moved linearly when brake clearance increases, and to ensure The outer end of guide rod acts on the components all the time under the elastic force effect of spring, i.e., is in spring in original state and is compressed State, then vehicle circuit or warning device are connected by electric connection line with the lead that on-off type switchs.In this company Connect under relation, when brake clearance increase and make the part move linearly when, guide rod stretch out shell outside one end spring bullet Power effect is lower to move same distance, then only need the limiting wear value of lining pad computed in advance, and utilize the limit Alarm can be achieved to design trigger mechanism triggering on-off type switch after guide rod is moved to same distance in attrition value.

This wear indicating device is directed to bar, on-off type switch and trigger mechanism and is integrated in shell, except shell is consolidated Outside being scheduled on the housing of disk brake, only disk brake is resisted against under the elastic force effect of spring by the outer end of guide rod Matching relationship is formed on one part, is not related to other connections with disk brake, therefore improve abrasion well The connection convenience of instruction device and disk brake, it need to only secure the housing on the housing of disk brake or by shell Pulled down from the housing of disk brake, you can realize the dismounting of whole wear indicating device and disk brake.Further, since Each accessory is integrated in shell so that this wear indicating device can depart from disk brake and be sold separately.

In the above-mentioned wear indicating device for disk brake, described shell includes body and is connected to this Enclosing cover on body, the outer end of described guide rod are stretched out originally external, described outer cover and are provided with for drawing for on-off type switch The wire hole and the mounting hole for making enclosing cover be fixed on disk brake that line passes.

Because guide rod, on-off type switch and trigger mechanism are worked in coordination, therefore for the ease of each accessory in shell Installation and cooperation, are split as body and enclosing cover, when being connected on disk brake, body is inserted into disc type brake by shell In the housing of device, enclosing cover be resisted against on the housing of disk brake and by fasteners through mounting holes and with disk brake Housing is mutually fixed.The mode of split settings shell not only increases installation and cooperation convenience of each accessory in shell, simultaneously The dismounting convenience of whole wear indicating device and disk brake is not interfered with again.Further, since on-off type switch is set In shell, in order to facilitate the connection of on-off type switch and vehicle circuit or warning device, therefore setting outlet is covered outside Hole, the lead for switching on-off type pass.

In the above-mentioned wear indicating device for disk brake, described body is cylindrical in shape, described outer to cover Location division with protrusion, location division are provided with positioning chamber, and described body is inner to have protrude and external diameter external more than this The extension in footpath, in described extension insertion positioning chamber, the inwall of described positioning chamber port is to contract.

When connecting body with enclosing cover, the extension that body one end is protruded is inserted in positioning chamber, then by positioning chamber end The inwall of mouth can not just be deviate to contract, the so extension of body out of positioning chamber, body is connected shape with enclosing cover Into shell, guide rod, on-off type switch and trigger mechanism are all located between body and enclosing cover again, so that by shell in disc type brake The dismounting of whole wear indicating device can be achieved in dismounting on the housing of device, improves the convenience of dismounting well.

In the above-mentioned wear indicating device for disk brake, the import of described wire hole is located at positioning chamber In cavity wall, the sidepiece of described enclosing cover is provided with the protection department of protrusion, and described protection department is provided with protection chamber, described wire hole Outlet positioned at protection chamber inwall on, described on-off type switch lead protection intracavitary is stretched into by wire hole, it is described Protection intracavitary is provided with protective plug.

Due to this wear indicating device be directed to bar, trigger mechanism and on-off type switch etc. accessory be all integrated into shell with The dismounting convenience with disk brake is improved, and wear indicating device is departed from disk brake and is sold separately, Disconnected or bending is touched in transportation or during selling separately in order to avoid the lead of on-off type switch, therefore is covered outside Protection department is set, the lead that on-off type switchs is introduced protection intracavitary by wire hole, protection then is set in protection intracavitary Plug gets up the pilot protection of on-off type switch.When wear indicating device and vehicle circuit or warning device are electrically connected Only need to remove protective plug from protection intracavitary.

In the above-mentioned wear indicating device for disk brake, described on-off type switch is brush plate, described Trigger mechanism include the brush layer being arranged on brush plate and the brush box being fixed on guide rod the inner, described brush The box side relative with brush plate is provided with brush, and the end of described brush is resisted against on brush layer, when guide rod is to stretching Go out shell direction be moved to brush when being separated with brush layer brush plate be in "on" position.

Original state, brush are resisted against on the brush layer of brush plate.When there is brake clearance to occur, guide rod is in spring Elastic force effect under moved to the direction for stretching out shell, now brush is together moved with guide rod, in this condition, brush Son is still to be in contact with the brush layer on brush plate, therefore brush plate is still not at on-state.When guide rod is to reach After dynamic distance reaches the limiting wear value of lining pad, brush is separated with brush layer, now brush plate and vehicle circuit Or the connection circuit of warning device forms and is powered and sends alarm.

Switched using this brush plate as on-off type, and the brush layer in the brush box and brush plate of powered brush is made Used for trigger mechanism so that this wear indicating device switchs on-off type and the connection circuit of vehicle circuit or warning device Connection process is all carried out in shell, is not related to the internal structure of disk brake, for improve this wear indicating device with The connection convenience of disk brake provides the foundation.

In the above-mentioned wear indicating device for disk brake, the bottom wall in described positioning chamber is provided with protrusion Attachment, there is ring-type protrusion, ring-type protrusion insertion attachment lateral wall and positioning cavity wall on the extension of described body Between, described attachment is provided with connection cavity, has on described body and is opened up from extension to the neck of the body other end One and neck two, neck three and neck four are offered on the inwall of described connection cavity, and described brush plate is stuck in neck one Interior and brush plate part is stuck in neck three, and described brush box is stuck in neck two and brush box part is stuck in neck four.

The extension of body upper end is inserted into the positioning chamber of enclosing cover, then the internal diameter of positioning chamber is necessarily greater than stretching The external diameter in portion, and brush plate and brush box must be fixed for the reason for avoid and influence fitment stability, Therefore set on body from extension and open up neck one and neck two to the body other end, card is set on the inwall of connection cavity Groove three and neck four, make brush plate be fixed on by neck one and neck three between body and enclosing cover, and brush box passes through neck two It is fixed on neck four between body and enclosing cover, brush box can so forms with brush plate while being integrated into shell It is preferably fixed, especially prevent brush plate from swinging, with this come ensure to be fixed on brush in brush box can stably with Brush layer on brush plate is engaged.

In the above-mentioned wear indicating device for disk brake, described extension sidepiece has outlet breach, The lead of described brush plate passes from outlet breach.

Being switched using brush plate as on-off type causes the inwall that lead is just face extension, therefore in order to avoid Wire kink, outlet breach is set in the sidepiece of extension, the lead of brush plate is directly passed and is worn from outlet breach Enter in wire hole.

In the above-mentioned wear indicating device for disk brake, as another technical solution, described break-make Formula switch is is fixed on the pull switch in positioning chamber, and the part that described guide rod is located in shell is in hollow form, and drawstring is opened The drawstring of pass is located in guide rod, and described trigger mechanism includes being fixed on the pull head of drawstring end and is fixed in guide rod Ring-shaped baffle on wall, described ring-shaped baffle can be resisted against on pull head and pull pull head.

Original state, there is the distance equal with the limiting wear value of lining pad between ring-shaped baffle and pull head.When having When brake clearance occurs, guide rod moves under the elastic force effect of spring to outside shell, and ring-shaped baffle together moves with guide rod Dynamic, the distance between ring-shaped baffle and pull head constantly reduce.When guide rod, which is moved to ring-shaped baffle, to be leant with pull head, friction Pad is in the critical point of limiting wear.As lining pad wears up to the limit, ring-shaped baffle can further be moved and pulled Head, pull head are pulled and pull switch is triggered, so that the company of on-off type switch and vehicle circuit or warning device Circuit is connect to be switched on and alarm occurs.

In the above-mentioned wear indicating device for disk brake, as another technical solution, described break-make For formula switch to be fixed on the microswitch in positioning chamber, described trigger mechanism includes trigger button and the setting of microswitch In intrinsic lever, the inwall of body is provided with the supporting part of protrusion, and described lever is hinged with supporting part, described thick stick The inner side of bar is relative with the trigger button of microswitch, and the inner of described guide rod is provided with butting section, and butting section is stretched out The sidepiece of guide rod is outer and the sidepiece of butting section is resisted against on lever, has kink on lever, when butting section be moved to it is curved Folding part can make lever the inner to the side oscillation close to microswitch when leaning.

When there is brake clearance to occur, guide rod moves under the elastic force effect of spring to the direction stretched out outside shell, supports Relying part together moves with guide rod.As lining pad wears up to the limit, the butting section of guide rod can be with the bending on lever Portion is in contact and extrudes kink, so that the inner of lever swings around supporting part and presses the trigger button of microswitch, So that it is switched on the connection circuit of vehicle circuit or warning device and alarm occurs.

In the above-mentioned wear indicating device for disk brake, positioning step is provided with the outside of described extension, The inwall of positioning chamber is provided with shoulder block, and shoulder block is resisted against on positioning step, and positioning step is provided with raised line and raised line is connected in and stretched Go out the outside in portion, the inwall of positioning chamber is provided with groove, and groove is identical with the shape of raised line and raised line is embedded in groove.

The quick assembling of body and enclosing cover can be realized by the cooperation of raised line and groove, saves installation time, especially Under the installation situation that trigger mechanism is considered between body and enclosing cover, quickly each part can be integrated using this structure Into a shell.

Compared with prior art, this wear indicating device for being used for disk brake is directed to bar, on-off type switch and touched Hair mechanism is integrated in shell, in addition to shell is fixed on the housing of disk brake, only by the outer end of guide rod in bullet It is resisted against under the elastic force effect of spring on a part of disk brake and forms matching relationship, is not related to and disk brake Other connections, therefore improve the connection convenience of wear indicating device and disk brake well, shell need to only be consolidated It is fixed to being pulled down on the housing of disk brake or by shell from the housing of disk brake, you can realize whole abrasion instruction The dismounting of device and disk brake.Further, since each accessory is integrated in shell so that this wear indicating device can depart from Disk brake is sold separately.

Brief description of the drawings

Fig. 1 is this schematic diagram for the wear indicating device of disk brake.

Fig. 2 is the schematic cross-sectional view that trigger mechanism in embodiment one is in original state.

Fig. 3 is the partial enlarged drawing in Fig. 2.

Fig. 4 is the schematic cross-sectional view that trigger mechanism in embodiment one is in triggering state.

Fig. 5 is the partial enlarged drawing in Fig. 4.

Fig. 6 is the structural representation between guide rod and brush plate in embodiment one.

Fig. 7 is that the brush box in embodiment one is stuck in intrinsic schematic diagram with brush plate.

Fig. 8 is the sectional view that the brush box in embodiment one is stuck in brush plate in enclosing cover.

Fig. 9 is this partial exploded view for the wear indicating device embodiment one of disk brake.

Figure 10 is the sectional view of the enclosing cover in embodiment one.

Figure 11 is this sectional view for the wear indicating device embodiment two of disk brake.

Figure 12 sheets are used for the sectional view of the wear indicating device embodiment three of disk brake.

In figure, 1, shell；1a, body；1a1, extension；1a11, outlet breach；1a2, positioning step；1a3, raised line； 1a4, neck one；1a5, neck two；1a6, ring-type protrusion；1a7, supporting part；1b, enclosing cover；1b1, mounting hole；1b2, wire hole； 1b3, location division；1b31, positioning chamber；1b32, shoulder block；1b33, groove；1b4, attachment；1b41, connection cavity；1b42, neck Three；1b43, neck four；1b5, protection department；1b51, protection chamber；2nd, guide rod；2a, butting section；3rd, trigger mechanism；4th, spring；5、 Brush plate；5a, brush layer；6th, brush box；7th, brush；8th, packing ring；9th, protective plug；10th, lead；11st, pull switch；11a, drawing Rope；12nd, pull head；13rd, ring-shaped baffle；14th, microswitch；14a, trigger button；15th, lever；15a, kink.

Embodiment

It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

Embodiment one

As shown in figure 1, a kind of wear indicating device for disk brake, including shell 1 and it is arranged in shell 1 On-off type switch, guide rod 2 and trigger mechanism 3, the outer end of guide rod 2 stretched out outside shell 1, and is stretched out in guide rod 2 outer The part of shell 1 is arranged with spring 4, and the inner of spring 4 is acted on shell 1, and the outer end of spring 4 is acted on guide rod 2.

As shown in Fig. 2, Fig. 4 and Fig. 9, shell 1 includes body 1a and enclosing cover 1b, and body 1a is cylindrical in shape, enclosing cover 1b connections In body 1a the inner, axial direction of the guide rod 2 along body 1a is located in body 1a and can moved relative to body 1a, break-make Formula switch is arranged between body 1a and enclosing cover 1b, and the outer end of guide rod 2 is stretched out outside body 1a, and in the outer end of guide rod 2 Packing ring 8 is fixed with, the outer end of spring 4 withstands on packing ring 8 and acted on by packing ring 8 on guide rod 2.

As shown in Fig. 2, Fig. 4, Fig. 8 and Fig. 9, there is the location division 1b3 of protrusion, location division 1b3 to be provided with fixed on enclosing cover 1b The inner extension 1a1 that there is protrude and external diameter to be more than body 1a external diameters of position chamber 1b31, body 1a, extension 1a1 insertions are fixed The inwall of in the chamber 1b31 of position and positioning chamber 1b31 ports just can not take off to contract, such extension 1a1 out of positioning chamber 1b31 Go out.Positioning step 1a2 is provided with the outside of extension 1a1, positioning chamber 1b31 inwall is provided with shoulder block 1b32, and shoulder block 1b32 is resisted against On positioning step 1a2, positioning step 1a2 is provided with raised line 1a3 and raised line 1a3 is connected in extension 1a1 outside, positioning chamber 1b31 inwall is provided with groove 1b33, and groove 1b33 is identical with raised line 1a3 shape and raised line 1a3 is embedded in groove 1b33.

As shown in fig. 6, on-off type switch is brush plate 5, trigger mechanism 3 includes the brush layer 5a being arranged on brush plate 5 And the brush box 6 on the inner of guide rod 2 is fixed on, the side relative with brush plate 5 of brush box 6 is provided with brush 7, brush 7 end is resisted against on brush layer 5a, when guide rod 2, which moves outwardly to brush 7, to be separated with brush layer 5a, at brush plate 5 In "on" position.

As shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10, in the present embodiment, the bottom wall in positioning chamber 1b31 is provided with the connection of protrusion There is ring-type protrusion 1a6, ring-type protrusion 1a6 insertion attachment 1b4 lateral walls and positioning on portion 1b4, body 1a extension 1a1 Between chamber 1b31 madial wall, attachment 1b4 is provided with connection cavity 1b41, has on body 1a from extension 1a1 and opens up to this The 1a4 of neck one and the 1a5 of neck two of body 1a outer ends, the 1b42 of neck three and neck four are offered on connection cavity 1b41 inwall 1b43, brush plate 5 and brush box 6 are stretched into connection cavity 1b41.Brush plate 5 is stuck in the 1a4 of neck one, and brush plate 5 stretches into Part in connection cavity 1b41 is stuck in the 1b42 of neck three, and brush box 6 is stuck in the 1a5 of neck two, and brush box 6 stretches into connection cavity Part in 1b41 is stuck in the 1b43 of neck four.

As shown in figs. 2 and 10, enclosing cover 1b is provided with some mounting hole 1b1, and mounting hole 1b1 center line is with body 1a's Axis is parallel.There is enclosing cover 1b sidepieces the protection department 1b5 of protrusion, protection department 1b5 to be set provided with chamber 1b51 is protected on enclosing cover 1b There is the wire hole 1b2 of the extraction of lead 10 for brush board 5 of powering, wire hole 1b2 import is located on positioning chamber 1b31 bottom wall, Wire hole 1b2 outlet, for the ease of outlet, is provided with protection chamber 1b51 bottom wall on body 1a extension 1a1 Outlet breach 1a11, it is intraoral that the lead 10 of brush plate 5 from outlet breach 1a11 is incorporated into entering for wire hole 1b2, and from wire hole 1b2 outlet is led in protection chamber 1b51.It is provided with protective plug 9 in protection chamber 1b51, protective plug 9 is by the lead 10 of brush plate 5 It is enclosed in protection chamber 1b51, only when the lead 10 of brush plate 5 and vehicle circuit or warning device are electrically connected Just protective plug 9 is removed out of protection chamber 1b51.

When wear indicating device is connected on disk brake, by shell 1 by fasteners through mounting holes 1b1 simultaneously On housing fixed to disk brake, and ensure that the outer end of guide rod 2 is resisted against and can be moved forward when brake clearance increases Part on, and to ensure that the outer end of guide rod 2 acts on the components, i.e., initial all the time under the elastic force effect of spring 4 State makes spring 4 be in confined state, then the drawing by electric connection line and brush plate 5 by vehicle circuit or warning device Line 10 is connected.

Under above-mentioned annexation, when brake clearance increases and moves forward the part, guide rod 2 stretches out shell 1 Outer one end can move forward same distance under the elastic force effect of spring 4, then only need lining pad computed in advance Limiting wear value, and touched using the limiting wear value to design the trigger mechanism 3 after guide rod 2 moves forward to same distance Send out on-off type switch and alarm can be achieved.

The specific galvanization of brush plate 5 is such：As shown in Figures 2 and 3, original state, brush 7 are resisted against electricity On the brush layer 5a of brush board 5.When there is brake clearance to occur, guide rod 2 moves under the elastic force effect of spring 4 to outside shell 1, Now brush 7 is together moved with guide rod 2, and in this condition, brush 7 is still and the brush layer 5a on brush plate 5 It is in contact, therefore brush plate 5 is still not at on-state.As shown in Figure 4 and Figure 5, when the distance that guide rod 2 moves forward reaches To after the limiting wear value of lining pad, brush 7 is separated with brush layer 5a, now brush plate 5 and vehicle circuit or alarm The connection circuit of device, which is formed, to be powered and sends alarm.

This wear indicating device is directed to bar 2, on-off type switch and trigger mechanism 3 and is integrated in shell 1, except shell 1 is fixed on the housing of disk brake outside, is only resisted against disc type system under the elastic force effect of spring 4 by the outer end of guide rod 2 Matching relationship is formed on one part of dynamic device, is not related to other connections with disk brake, therefore improve well The connection convenience of wear indicating device and disk brake, shell 1 need to be only fixed on the housing of disk brake or It is to pull down shell 1 from the housing of disk brake, you can realize the dismounting of whole wear indicating device and disk brake. Further, since each accessory is integrated in shell 1 so that this wear indicating device can depart from disk brake and individually be sold Sell.

Embodiment two

The present embodiment is essentially identical with the structure and principle of embodiment one, and difference is：As shown in figure 11, in this reality Apply in example, to be fixed on the pull switch 11 in positioning chamber 1b31, the part that guide rod 2 is located in shell 1 is in on-off type switch Hollow form, the drawstring 11a of pull switch 11 are located in guide rod 2, and trigger mechanism 3 includes the drawstring for being fixed on pull switch 11 The pull head 12 of 11a ends and the ring-shaped baffle 13 being fixed on the inwall of guide rod 2, ring-shaped baffle 13 can be resisted against pull head 12 Go up and pull pull head 12.

The specific trigger process of trigger mechanism 3 in the present embodiment is such：Original state, ring-shaped baffle 13 and pull head There is the distance equal with the limiting wear value of lining pad between 12.When there is brake clearance to occur, guide rod 2 is in spring 4 Elastic force effect under moved to outside shell 1, ring-shaped baffle 13 together moves with guide rod 2, ring-shaped baffle 13 and pull head 12 it Between distance constantly reduce.When guide rod 2, which is moved to ring-shaped baffle 13, to be leant with pull head 12, lining pad is in limit mill The critical point of damage.As lining pad wears up to the limit, ring-shaped baffle 13 can further move and pull pull head 12, the quilt of pull head 12 Pull and pull switch 11 is triggered, so that on-off type switch and vehicle circuit or the connection circuit quilt of warning device Connect and alarm occurs.

Embodiment three

The present embodiment is essentially identical with the structure and principle of embodiment one, and difference is：As shown in figure 12, in this reality Apply in example, for on-off type switch to be fixed on the microswitch 14 in positioning chamber 1b31, trigger mechanism 3 includes touching for microswitch 14 Hair button 14a and the lever 15 being arranged in body 1a, body 1a inwall are provided with the supporting part 1a7 of protrusion, lever 15 It is hinged with supporting part 1a7, the inner side of lever 15 is relative with the trigger button 14a of microswitch 14, the inner of guide rod 2 Provided with butting section 2a, the sidepiece of butting section 2a stretching guide rods 2 is outer and butting section 2a sidepiece is resisted against on lever 15, lever 15 Upper to have kink 15a, when butting section, 2a, which is moved to when being leant with kink 15a, can make lever 15 is inner to be held to close to fine motion Close 14 side oscillation.

The specific trigger process of trigger mechanism 3 in the present embodiment is such：When there is brake clearance to occur, guide rod 2 move under the elastic force effect of spring 4 to outside shell 1, and butting section 2a together moves with guide rod 2, butting section 2a extruding thick sticks Bar 15 and make the inner side oscillation and lever 15 to close to microswitch 14 of lever 15 be resisted against the triggering of microswitch 14 by On button 14a.As lining pad wears up to the limit, the butting section 2a of guide rod 2 can be extruded and be pressed the triggering of microswitch 14 Button 14a, so that being switched on the connection circuit of vehicle circuit or warning device and alarm occurring.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Claims (10)

1. a kind of wear indicating device for disk brake, including on-off type switch, guide rod (2) and trigger mechanism (3), it is characterised in that wear indicating device also includes shell (1), and described guide rod (2) and on-off type switch may be contained within In shell (1) and guide rod (2) can move axially relative to shell (1), and shell is stretched out in the outer end of described guide rod (2) (1) outside, the part for shell (1) being stretched out in guide rod (2) is arranged with spring (4), and the inner of spring (4) is acted on shell (1), The outer end of spring (4) is acted on guide rod (2), is touched when guide rod (2) moves setpoint distance to the direction for stretching out shell (1) Hair mechanism (3) can trigger on-off type switch.

2. the wear indicating device according to claim 1 for disk brake, it is characterised in that described shell (1) body (1a) and the enclosing cover (1b) being connected on body (1a) are included, body is stretched out in the outer end of described guide rod (2) (1a) outside, described enclosing cover (1b) be provided with the wire hole (1b2) that passes of lead (10) that is used for switching for on-off type and In the mounting hole (1b1) for making enclosing cover (1b) be fixed on disk brake.

3. the wear indicating device according to claim 2 for disk brake, it is characterised in that described body (1a) is cylindrical in shape, and has the location division (1b3) of protrusion on described enclosing cover (1b), location division (1b3) is provided with positioning chamber (1b31), the inner extension (1a1) that there is protrude and external diameter to be more than body (1a) external diameter of described body (1a) are described In extension (1a1) insertion positioning chamber (1b31), the inwall of described positioning chamber (1b31) port is to contract.

4. the wear indicating device according to claim 3 for disk brake, it is characterised in that described wire hole The import of (1b2) is located in the cavity wall of positioning chamber (1b31), and the sidepiece of described enclosing cover (1b) is provided with the protection department of protrusion (1b5), described protection department (1b5) are provided with protection chamber (1b51), and the outlet of described wire hole (1b2) is positioned at protection chamber On the inwall of (1b51), the lead (10) of described on-off type switch is stretched into protection chamber (1b51) by wire hole (1b2), institute Protective plug (9) is provided with the protection chamber (1b51) stated.

5. the wear indicating device for disk brake according to claim 3 or 4, it is characterised in that described is logical Disconnected formula switch is brush plate (5), and described trigger mechanism (3) includes the brush layer (5a) being arranged on brush plate (5) and consolidated Brush box (6) on guide rod (2) the inner, described brush box (6) are provided with brush with the relative side of brush plate (5) (7), the end of described brush (7) is resisted against on brush layer (5a), when guide rod (2) moves to the direction for stretching out shell (1) Move to brush (7) separated with brush layer (5a) when brush plate (5) be in "on" position.

6. the wear indicating device according to claim 5 for disk brake, it is characterised in that described positioning chamber Bottom wall in (1b31) is provided with the attachment (1b4) of protrusion, has ring-type protrusion on the extension (1a1) of described body (1a) (1a6), between ring-type protrusion (1a6) insertion attachment (1b4) lateral wall and positioning chamber (1b31) inwall, described attachment (1b4) is provided with connection cavity (1b41), has on described body (1a) and is opened up from extension (1a1) to body (1a) other end Neck one (1a4) and neck two (1a5), neck three (1b42) and card are offered on the inwall of described connection cavity (1b41) Groove four (1b43), described brush plate (5) is stuck in neck one (1a4) and brush plate (5) is partly stuck in neck three (1b42), Described brush box (6) is stuck in neck two (1a5) and brush box (6) is partly stuck in neck four (1b43).

7. the wear indicating device according to claim 6 for disk brake, it is characterised in that described extension (1a1) sidepiece has outlet breach (1a11), and the lead (10) of described brush plate (5) passes from outlet breach (1a11).

8. the wear indicating device for disk brake according to claim 3 or 4, it is characterised in that described is logical For disconnected formula switch to be fixed on the pull switch (11) in positioning chamber (1b31), described guide rod (2) is located at the portion in shell (1) It is in hollow form to divide, and the drawstring (11a) of pull switch (11) is located in guide rod (2), and described trigger mechanism (3) includes being fixed on The pull head (12) of drawstring (11a) end and the ring-shaped baffle (13) being fixed on guide rod (2) inwall, described ring-shaped baffle (13) it can be resisted against on pull head (12) and pull pull head (12).

9. the wear indicating device for disk brake according to claim 3 or 4, it is characterised in that described is logical For disconnected formula switch to be fixed on the microswitch (14) in positioning chamber (1b31), described trigger mechanism (3) includes microswitch (14) trigger button (14a) and the lever (15) being arranged in body (1a), the inwall of body (1a) are provided with protrusion Supporting part (1a7), described lever (15) are hinged with supporting part (1a7), the inner side of described lever (15) and fine motion Relatively, the inner of described guide rod (2) is provided with butting section (2a) to the trigger button (14a) of switch (14), and butting section (2a) stretches It is outer and the sidepiece of butting section (2a) is resisted against on lever (15) to go out the sidepiece of guide rod (2), there is kink on lever (15) (15a), when butting section, (2a), which is moved to when being leant with kink (15a), can make lever (15) inner to close to microswitch (14) a side oscillation.

10. the wear indicating device for disk brake according to claim 3 or 4, it is characterised in that described stretches Go out on the outside of portion (1a1) and be provided with positioning step (1a2), the inwall of positioning chamber (1b31) is provided with shoulder block (1b32), shoulder block (1b32) It is resisted against on positioning step (1a2), positioning step (1a2) is provided with raised line (1a3) and raised line (1a3) is connected in extension The outside of (1a1), the inwall of positioning chamber (1b31) are provided with groove (1b33), the shape phase of groove (1b33) and raised line (1a3) In the embedded groove (1b33) of same and raised line (1a3).