CN201206605Y

CN201206605Y - Floating caliper brake

Info

Publication number: CN201206605Y
Application number: CNU2008200939838U
Authority: CN
Inventors: 李小永; 李传博
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2008-05-14
Filing date: 2008-05-14
Publication date: 2009-03-11
Anticipated expiration: 2018-05-14

Abstract

The utility model provides a floating caliper disk brake, which comprises a caliper body, a support and a shaft pin. The shaft pin comprises a polished rod, a connection part and a fixed lever. The fixed lever is fixed on the other side where the connection part is opposite to the polished rod; the connection part and the fixed lever is connected coaxially as a whole; a location hole is formed on the caliper body and matched with the fixed lever; the fixed lever passes through the location hole and is fixedly connected with the caliper body. The fixed lever is connected with the connection part as a whole, the fixed lever passes through the location hole and the fixed lever is matched with the location hole, so that the parallelism of the medial axes between the shaft pin and the caliper body can be ensured by the parallelism of the medial axes between the location hole and the caliper body. From the viewpoint of the processing technology, the parallelism of the location hole can be easily ensured, thereby improving the parallelism between the shaft pin and the caliper body, avoiding the problem that the shaft pin is ineffective or stuck because the shaft pin and the caliper body are fixed through a bolt and a screwed hole, and enabling the shaft pin to have better guide function.

Description

A kind of unsteady caliper disc brake

Technical field

The utility model relates to a kind of unsteady caliper disc brake.

Background technique

As shown in Figure 1, a kind of unsteady caliper disc brake of the prior art, be fixed on the stub axle, the pivot pin 13 that it comprises brake-caliper support 11, braking clamp body 12 and is symmetricly set in support 11 both sides, pivot pin 13 1 ends are fixed on the caliper 12 by bolt 14, its the other end is positioned at the guiding groove 111 of support 11, is slidingly connected with support 11.

Please in conjunction with Fig. 2, above-mentioned caliper 12 tops are provided with filler opening 121, are provided with piston 122, first brake pad 123, brake disc 124 and second brake pad 125 in the cavity of caliper 12 vertically successively.When braking, brake fluid is entered in the caliper 12 by filler opening 121, and the piston 122 in the caliper 12 is pushed first brake pad 123 to brake disc 124 under the effect of hydraulic coupling.Simultaneously, the reaction force promotion caliper 12 that acts on the caliper 12 moves in the other direction along pivot pin 13, and second brake pad 125 is pressed against on the brake disc 124.Like this, the brake pad 123,125 of brake disc 124 both sides clamps brake disc 124 under this effect to active force, produce friction torque, makes automobile brake.

Therefore, in braking process, pivot pin 13 plays leading role for caliper 12 axial motions, and guarantees that the principal element of caliper 12 axial motions is the parallelism of two pivot pins, 13 medial axis and caliper 12 medial axis.

As shown in Figure 3, the pivot pin 13 that prior art adopts comprises polished rod 131, joint 132, hexagon head 133, polished rod 131 is connected by joint 132 with hexagon head 133, pivot pin 13 is offered tapped hole 134 vertically in hexagon head 133 1 ends, and the size of the size of tapped hole 134 and above-mentioned bolt 14 is complementary.During assembling, the polished rod 131 of pivot pin 13 is arranged in the guiding groove 111 of support 11, enters in the guiding groove 111 in order to prevent dust, and dustproof groove 132a is set on joint 132, and this dustproof groove 132a circumferentially is provided with pivot pin sheath 135.The assembly department that bolt 14 passes caliper 12 is fixed in the tapped hole 134 of pivot pin 13, and the end face of the attachment face of caliper 12 and hexagon head 133 is fitted, and utilizes nut 15 tight tops of twisting bolt 14, and caliper 12 is fixedlyed connected with pivot pin 13.

The shortcoming of this pivot pin 13 is: 1, the blank of general pivot pin 13 adopts forging, the bad assurance of coaxality in the process of processing between the axis of the axis of polished rod 131 and tapped hole 134; 2, during thread mill drilling 134, cause the wall thickness of tapped hole thin excessively easily, cause installing 13 distortion of back pivot pin or lost efficacy; 3, be subject to processing the influence of technology, be difficult to guarantee the perpendicularity of the medial axis of hexagon head 133 end faces and polished rod 131 medial axis, tapped hole 134, it is angled that back two bearing pins 13 are installed, and makes caliper 12 be difficult to slide or stuck, and pivot pin 13 can't play leading role.

The model utility content

Technical problem to be solved in the utility model is, a kind of unsteady caliper disc brake is provided, and can make pivot pin play leading role better.

In order to solve the problems of the technologies described above, the utility model provides a kind of unsteady caliper disc brake, comprises caliper, support and pivot pin.Pivot pin comprise polished rod with the coaxial joint that is connected of polished rod, guiding groove is set on support, polished rod is positioned at guiding groove, and is slidingly connected with support, and positioning hole is set on caliper.Pivot pin also comprises the fixing rod that is complementary with positioning hole, and fixing rod is positioned at the joint opposite side relative with polished rod, and joint is connected with the fixing rod one is coaxial, and fixing rod is arranged in the positioning hole, and fixedlys connected with caliper.

The fixing rod of pivot pin is fixedlyed connected with caliper, and its polished rod and support are slidingly connected, and when unsteady caliper disc brake was braked, caliper was along the axial motion of guiding groove.Because the fixing rod of pivot pin is connected with joint is coaxial, and joint is coaxial with polished rod, therefore can guarantee the coaxality of fixing rod and polished rod.Again because fixing rod is that one is connected with joint, and fixing rod is in positioning hole, and fixing rod and positioning hole be complementary, therefore, between pivot pin and the caliper parallelism of medial axis dependence positioning hole and caliper between the parallelism of medial axis guarantee.On processing technology, the parallelism of positioning hole more easily guarantees, thereby improved the parallelism between bearing pin and the caliper, prevented in the prior art, problem such as cause fixedly by bolt and tapped hole that pivot pin lost efficacy between pivot pin and the caliper and stuck makes pivot pin play leading role better.

Description of drawings

Fig. 1 is a kind of unsteady caliper disc brake structural representation that prior art provides;

Fig. 2 is the cross-sectional schematic of Fig. 1;

Fig. 3 is the structural representation of pivot pin among Fig. 1;

Fig. 4 is a kind of unsteady caliper disc brake structural representation that the utility model embodiment provides;

Fig. 5 is the structural representation of pivot pin among Fig. 4.

Embodiment

In order to make technical problem to be solved in the utility model, technological scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

See also Fig. 4 and Fig. 5, the utility model embodiment provides a kind of unsteady caliper disc brake, comprises caliper 21, support 22 and pivot pin 23.Pivot pin 23 comprises polished rod 231, joint 232 and fixing rod 233, and polished rod 231 and 232 coaxial connections of joint are provided with guiding groove 221 on support 22, and polished rod 231 is positioned at guiding groove 221, is slidingly connected with support 22.Fixing rod 233 is positioned at the relative opposite side of joint 232 and polished rod 231, joint 232 and coaxial connection of fixing rod 233 one.The positioning hole (not shown) is set on caliper 21, and this positioning hole and fixing rod 233 are complementary, and fixing rod 233 is arranged in the positioning hole, and fixedly connected with caliper 21.

Particularly, in the present embodiment, pivot pin 23 roughly is column, its fixing rod 233 comprise connecting part 233a with the coaxial screw rod 233b that is connected of connecting part 233a, connecting part 233a is between joint 232 and screw rod 233b.Caliper 21 has assembly department 211, and above-mentioned positioning hole is arranged on the assembly department 211, and connecting part 233a is arranged in the positioning hole, and with assembly department 211 Spielpassung.Go up a sheathed nut 233c in screw rod 233b, nut 233c and screw rod 233b are complementary, and will be threaded to the assembly department 211 of crimper body 21 under the nut 233c with instrument, and assembly department 211 is fastened onto between nut 233c and the joint 232.Like this,, need only the parallelism between the medial axis 32 of the medial axis 31 of assurance positioning hole and caliper 21, just can make the medial axis 31 ' of bearing pin 23 parallel with the medial axis 32 of caliper 21 because the medial axis 31 of positioning hole overlaps with the medial axis 31 ' of pivot pin 23.

Above-mentioned joint 232 is the boss shape, and its external diameter is greater than the external diameter of fixing rod 233 and polished rod 231.The end that joint 232 is connected with connecting part 233a has the supporting portion 232a of a boss shape, and supporting portion 232a and 233a joint, connecting part form circular table, and this table top is used to support the lower surface of assembly department 211.Compared with prior art, owing to need not to offer tapped hole, can process circular table littler at this end face, reduced of the influence of this table top to pivot pin 23 parallelism, and, also avoided because of the wall thickness of tapped hole is thin excessively, cause installing 23 distortion of back pivot pin or inefficacy.

Assembly department 211 is fixing better for convenience, also is provided with the clamping position 232b that is connected with above-mentioned supporting portion 232a on the joint 232 of boss shape, and from the footpath always, the outer surface that clamps position 232b is higher than the outer surface of supporting portion 232a.When screw rod 233b screws in nut 233c, clamping the position 232b pivot pin 23 that is fixedly clamped, prevent pivot pin 23 rotations with instrument.In the present embodiment, the cross section that clamps position 232b is roughly rounded, and its bilateral symmetry has been excised a string arc, skids when preventing tool holder.This cross section can also be a polygonal, as long as can clamp position 232b all within protection domain of the present utility model for instrument provides.

In order to prevent that dust from entering in the guiding groove 221, influence sliding capability between polished rod 231 and the guiding groove 221, on joint 232, also offer dustproof groove 232c, should be positioned at a clamping position 232b opposite side relative by dustproof groove 232c with supporting portion 232a, in the guiding groove 221 of support 22, also offer dustproof groove 222, the two ends of one dirt-proof boot 24 are individually fixed in the dustproof groove 232c, 222 of joint 232 and guiding groove 221, and joint 232 is in dirt-proof boot 24.Dirt-proof boot 24 parts stretch in the guiding groove 221, and part is positioned at the outside of guiding groove 221, like this, can make pivot pin 23 better with guiding groove 221 outlet junction sealabilities.

The fixing rod 233 of pivot pin 23 is fixedlyed connected with caliper 21, and its polished rod 231 is slidingly connected with support 22, and when unsteady caliper disc brake was braked, caliper 21 was along the axial motion of guiding groove 221.Since the fixing rod 233 and 232 coaxial connections of joint of pivot pin 23, and joint 232 is coaxial with polished rod 231, therefore can guarantee the coaxality of fixing rod 233 and polished rod 231.Again because fixing rod 233 is that one is connected with joint 232, and fixing rod 233 is in positioning hole, and fixing rod 233 is complementary with positioning hole, therefore, the parallelism between the

medial axis

31,32 of dependence positioning hole of the parallelism between the medial axis 31 ', 32 of pivot pin 23 and caliper 21 and caliper 21 guarantees.On processing technology, the parallelism of positioning hole more easily guarantees, thereby improved the parallelism between the medial axis 31 ', 32 of bearing pin 23 and caliper 21, prevented in the prior art, problem such as cause fixedly by bolt and tapped hole that pivot pin lost efficacy between pivot pin 23 and the caliper 21 and stuck makes pivot pin 23 play leading role better.In addition, because pivot pin 23 need not to offer tapped hole,, make the processing of bearing pin 23 convenient with fixing rod 233 and joint 232 one machine shapings.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, a kind of unsteady caliper disc brake, comprise caliper, support and pivot pin, described pivot pin comprise polished rod with the coaxial joint that is connected of described polished rod, on described support, guiding groove is set, described polished rod is positioned at described guiding groove, and be slidingly connected with described support, on described caliper, positioning hole is set, it is characterized in that: described pivot pin also comprises the fixing rod that is complementary with described positioning hole, described fixing rod is positioned at the described joint opposite side relative with described polished rod, described joint is connected with the fixing rod one is coaxial, and described fixing rod is arranged in the positioning hole, and fixedlys connected with described caliper.

2, unsteady caliper disc brake as claimed in claim 1 is characterized in that: described fixing rod comprises connecting part and the screw rod that is connected with described connecting part, and described binding site is between described joint and screw rod, and described connecting part is arranged in the described positioning hole.

3, unsteady caliper disc brake as claimed in claim 2, it is characterized in that: described caliper has assembly department, described positioning hole is arranged on the described assembly department, is with a nut on described screw rod, and described assembly department is fastened onto between described nut and the joint.

4, unsteady caliper disc brake as claimed in claim 3, it is characterized in that: described joint is provided with the supporting portion of boss shape, described supporting portion is connected with the connecting part, and the junction surface between described supporting portion and connecting part forms circular table, and the bottom surface of described table top and assembly department connects.

5, unsteady caliper disc brake as claimed in claim 4 is characterized in that: described joint is provided with the clamping position that promising clamping tool provides the fixed position, and described clamping position is connected with the supporting portion.

6, unsteady caliper disc brake as claimed in claim 5 is characterized in that: the described surface of position that clamps is on the surface that radially is higher than the supporting portion.

7, unsteady caliper disc brake as claimed in claim 5 is characterized in that: the described cross section that clamps the position is the circle that lacks the string arc.

8, unsteady caliper disc brake as claimed in claim 5 is characterized in that: the described cross section that clamps the position is a polygonal.

9, unsteady caliper disc brake as claimed in claim 1 is characterized in that: described fixing rod and positioning hole Spielpassung.

10, as each described unsteady caliper disc brake of claim 1-9, it is characterized in that: offer dustproof groove respectively on the described joint and in the guiding groove of described support, one dirt-proof boot two ends are individually fixed in the dustproof groove of described joint and guiding groove, and described joint is in described dirt-proof boot.