CN1789749A

CN1789749A - Caliper disc brake

Info

Publication number: CN1789749A
Application number: CN 200410089486
Authority: CN
Inventors: 萧方忠; 张群威
Original assignee: Individual
Current assignee: NINGBO HELI MOULD TECHNOLOGY Co Ltd
Priority date: 2004-12-13
Filing date: 2004-12-13
Publication date: 2006-06-21
Anticipated expiration: 2024-12-13
Also published as: CN100363641C

Abstract

This invention relates to one clamp disc brake, which comprises card clamp rack, card clamp part, friction bus, upper cover, pressure arm with other end fixed on the cover and rotation socket, wherein, the racket two sides have screw holes connected with screw bar with its down end through axis socket connected with pressure block; the block bottom and friction bus block surface are contacted together; the one screw bar has adjusting gap drive axis automatic structure; the other screw bar has adjusting gap passive axis structure bus connected through one simultaneous drive structure.

Description

Caliper disc brake

Technical field

The present invention relates to the technical field of automobile, relate in particular to a kind of caliper disc brake with break.

Background technique

Existing automobile brake has drum-type and disc type two big classes, and power mode has the branch of hydraulic pressure and air pressure.Early stage automobile brake is based on drum-type, development along with braking technology, disk type braker has appearred, because disk type braker has rapid heat dissipation, in light weight, simple structure, advantage such as easy to adjust, therefore disk type braker has obtained using widely, as a patent No. is that the Chinese invention patent " automobile pressure disk type braker " of ZL01212585.7 (notification number is CN2468851Y) has disclosed the structure so a kind of, a kind of automobile pressure disk type braker, it is characterized in that break is mainly by caliper bracket, caliper body, long guide pin bushing, the short-range missile cover, lining, pressure arm, rotating assembly, the needle roller pair, supported spring, piston rod, slurcocks and brake pad assembly are formed, its connection relationship is: the caliper bracket stay bolt, lag bolt and long guide pin bushing, the short-range missile cover is fastenedly connected, guide pin bushing inserts the Kong Zhongyu lining of caliper body and does movingly, and caliper body is in axial sliding with respect to caliper bracket along the guide pin bushing axis: the brake pad assembly of brake disc both sides is pressed on the supporting surface of caliper bracket by two place's friction plate stage clips; Rotating assembly is contained in the inner chamber of caliper body by two support springs are outstanding, and move in cylinder hole, well; Pressure arm one end freedom is against loam cake, and another cambered surface forms relative movement by needle roller is secondary with rotating assembly; Piston rod is connected with rotating assembly by screw thread, and its end face spline pin inserts in the slurcocks spacing hole; Slurcocks is pressed on the caliper bracket supporting surface by the friction plate stage clip, the slip of leading in the skewed slot of caliper bracket of the flange of lower end.Yet because the upper end of brake pad assembly has only one place, center to be subjected to the thrust of push pedal in the above-mentioned model utility; in this case; if being worn, the brake pad assembly can be easy to generate discontinuity; not only can make the faster of brake pad assembly wearing and tearing; but also braking effect is weakened; though also have above-mentioned automobile pressure disk type braker shaft assembly; the needle roller pair; pressure arm and piston rod constitute one group of unidirectional rotation boosting mechanism; can adjust the excessive gaps between brake pad assembly and the brake disc; owing to wherein there is not a protection mechanism; adjusting when us in the process of excessive gaps; may occur pressure arm is overexerted; thereby cause the damage of whole break, so the structure of above-mentioned automobile pressure disk type braker can also be improved further.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of caliper disc brake at above-mentioned prior art present situation, this caliper disc brake can exert oneself simultaneously to brake to brake pad assembly both sides, has advantages such as good braking effect, compactness rational in infrastructure, long service life.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: a kind of caliper disc brake, include caliper bracket, caliper body, brake pad assembly, loam cake, pressure arm, loam cake and caliper body link together, but between described caliper bracket and the caliper body by bolt and guide pin bushing slide relative link together; The brake pad assembly of brake disc both sides is pressed on the supporting surface of caliper bracket by the friction plate stage clip;

It is characterized in that described pressure arm one end freely is resisted against a side of loam cake, the loam cake below is provided with shaft support, the pressure arm the other end is placed between loam cake and the shaft support rotationally, and links together by an eccentric stiffener and the shaft support that shaft support is produced to bottom offset;

Be supported with return spring between described shaft support below and the caliper body, has tapped hole in the shaft support both sides, its internal thread is connected with screw rod, and the lower end of described screw rod is connected with briquetting by bearing, and briquetting bottom surface and brake pad assembly surface contact matching are together.

Adjust function in order to make above-mentioned caliper disc brake have the excess gap, above-mentioned screw rod has a cavity, the driving shaft automechanism assembly that also has clearance-adjustable therein in screw cavity, the driven axle automechanism assembly that has clearance-adjustable in another screw cavity is connected together by a synchronous driving mechanism between described driving shaft automechanism assembly and the driven axle automechanism assembly.

In order to make above-mentioned driving shaft automechanism assembly and driven axle automechanism assembly not only have the function in automatic adjustment excess gap, also make it have the function of overload protection, above-mentioned its structure of driving shaft automechanism assembly is: include driving shaft, driving shaft one end is connected with positioning seat assembly and gap positioning seat by bearing, described positioning seat assembly links to each other with caliper body, positioning seat one side in gap has breach, on the driving shaft below the positioning seat of gap, also be provided with declutch shaft and separation block, the separation block below has a cavity, above-mentioned driving shaft tail end is fixed with fixed block, fixed block is arranged in below in the separation block cavity, between separation block and screw cavity inwall, be provided with one and drive the drive mechanism that screw rod rotates, at the gap positioning seat, be provided with overrunning clutch between declutch shaft and the driving shaft, between declutch shaft and separation block, be provided with free wheel device;

Described its structure of driven axle automechanism assembly is: include driven axle, driven axle one end is connected with the positioning seat assembly by bearing, described positioning seat assembly links to each other with caliper body, above-mentioned driven axle afterbody end is fixed with adjusts seat, adjust between seat and the positioning seat assembly and be provided with supported spring, and between adjustment seat and screw cavity inwall, be provided with the drive mechanism that a drive screw rod rotates;

Described synchronous drive mechanism just is arranged between driving shaft and the driven axle end;

Has the driving lever that matches with described breach on the described pressure arm.

Above-mentioned overrunning clutch is a clutch spring; Its structure of described free wheel device is: be provided with groove in the separation block upper-end surface, the lower end surface correspondence of declutch shaft is provided with groove, groove is built-in with ball, and declutch shaft and separation block combine by ball, and is being supported with spring between the inwall on fixed block upper-end surface and the separation block cavity.

Its structure of above-mentioned synchronous drive mechanism is: the end of described driving shaft is provided with sprocket wheel, also be provided with sprocket wheel on the described driven axle, between above-mentioned sprocket wheel, link together, adopt this kind synchronous drive mechanism to have advantages such as simple in structure, easy to process by a chain.

Being provided with one between above-mentioned separation block and the screw cavity inwall drives the drive mechanism that screw rod rotates and be: described separation block outer wall has lug boss, and the corresponding position has a retaining groove that matches with lug boss in screw cavity.Being provided with a drive mechanism that drives the screw rod rotation between above-mentioned adjustment seat and the screw cavity inwall is; A described adjustment seat outer wall has lug boss, and the corresponding position has a retaining groove that matches with lug boss in the screw cavity.

Above-mentioned eccentric stiffener is: the pressure arm convex globoidal is rotatably connected to loam cake by needle bearing, and its concave arc surface of described pressure arm links together by ball and shaft support, and the center of described convex globoidal and concave arc surface is eccentric.Its concave arc surface of pressure arm is linked together by steel ball and shaft support, can make the rotation of pressure arm more flexible.

Compared with prior art, the invention has the advantages that because it has tapped hole in the shaft support both sides, its internal thread is connected with screw rod, the lower end of described screw rod is connected with briquetting by bearing, the pressure arm convex globoidal is in the swing at needle bearing and loam cake center so the swing process at pressure arm, because the off-centring of pressure arm convex globoidal and pressure arm concave surface, its concave arc surface center produces a downward displacement distance, it is descending to make the shaft support assembly overcome return spring power, and then promote inboard brake pad assembly, the brake pad assembly is contacted with brake disc, act on the opposite force of caliper body simultaneously, make caliper body unsteady with respect to the caliper body support along two guide pin bushings, make the brake pad in the outside press brake disc, finally make the brake pad of two sides compress brake disc simultaneously, thereby realized the purpose of braking, will make the both sides of brake pad assembly, multiple spot is simultaneously stressed, make between brake pad assembly and the brake disc close more contiguously and descending steady, so braking effect is better, can also prevent effectively that the brake pad assembly from owing to the wearing and tearing that discontinuity causes are accelerated, having increased the working life of break.

Description of drawings

Fig. 1 is the structural representation (overlooking) of the embodiment of the invention;

Fig. 2 is the partial sectional view of Fig. 1;

Fig. 3 is that the A-A of Fig. 1 is to sectional view;

Fig. 4 is a driving shaft automechanism assembly sectional view in the embodiment of the invention;

Fig. 5 is a driven axle automechanism assembly sectional view in the embodiment of the invention;

Fig. 6 is a driving shaft automechanism assembly structure broken away view in the embodiment of the invention;

Fig. 7 is a driven axle automechanism assembly stereogram in the embodiment of the invention;

Fig. 8 is the erection drawing between the supporting of embodiment of the invention shaft and pressure arm, brake pad assembly, driving shaft automechanism assembly, the driving shaft automechanism assembly;

Fig. 9 is the structural representation of pressure arm in the embodiment of the invention;

Figure 10 is the structural representation of loam cake in the embodiment of the invention.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

A kind of caliper disc brake shown in Fig. 1～6, include caliper bracket 1, caliper body 2, brake pad assembly 3, loam cake 4, pressure arm 5, loam cake 4 links together with caliper body 2, link together with long guide pin bushing 26, short-range missile cover 27 by stay bolt 24, lag bolt 25 between described caliper bracket 1 and the caliper body 2, long guide pin bushing 26, short-range missile cover 27 insert the Kong Zhongyu lining 28 of caliper body 2 and do movingly, and caliper body 2 is in axial sliding with respect to caliper bracket 1 along the guide pin bushing axis; The brake pad assembly 3 of brake disc 6 both sides is pressed on the supporting surface of caliper bracket 1 by two place's friction plate stage clips 7;

As Fig. 3, Fig. 8, shown in Figure 9, described pressure arm 5 one ends freely are resisted against a side of loam cake 4, loam cake 4 belows are provided with shaft support 14, pressure arm 5 the other ends are arranged between loam cake 4 and the shaft support 14 rotationally, the convex globoidal 51 of pressure arm 5 contacts by the inwall of needle bearing 22 with loam cake 14, described pressure arm 5 its concave arc surfaces 52 link together by steel ball 23 and shaft support 14, and described convex globoidal 51 is eccentric with the center of concave arc surface 52, also forms driving lever 53 on the convex globoidal 51 of pressure arm 5.

As Fig. 2, shown in Figure 3, be supported with a return spring 15 between described shaft support 14 belows and the caliper body 2, has tapped hole in shaft support 14 both sides, and this tapped hole is symmetrically distributed, its internal thread is connected with screw rod 16, the lower end of screw rod 16 is connected with briquetting 18 by bearing 17, and briquetting 18 bottom surfaces and brake pad assembly 3 surperficial contact matching are together.

Screw rod 16 has a cavity, the driving shaft automechanism assembly 8 that also has clearance-adjustable therein in screw cavity, as Fig. 4, shown in Figure 6, driving shaft automechanism assembly 8 includes driving shaft 81, driving shaft 81 1 ends are connected with positioning seat assembly 83 and gap positioning seat 84 by bearing 82, described positioning seat assembly 83 links to each other with caliper body 2, positioning seat 84 1 sides in gap have breach 85, on the driving shaft below the gap positioning seat 84 81, also be provided with declutch shaft 86 and separation block 87, separation block 87 belows have a cavity, above-mentioned driving shaft 81 tail ends are fixed with fixed block 88, fixed block 88 is arranged in below in separation block 87 cavitys, and be supported with spring 811 between the inwall on fixed block 88 upper-end surfaces and separation block 87 cavitys, between separation block 87 and screw rod 16 cavity inner walls, be provided with one and drive the drive mechanism that screw rod rotates, at gap positioning seat 84, be provided with overrunning clutch between declutch shaft 86 and the driving shaft 81, this overrunning clutch is a clutch spring 89, and be provided with groove in separation block 87 upper-end surfaces, the lower end surface correspondence of declutch shaft 86 is provided with groove, groove is built-in with ball 810, declutch shaft 86 and separation block 87 combine by ball 810, being provided with a drive mechanism that drives screw rod 16 rotations between above-mentioned separation block 87 and screw rod 16 cavity inner walls is: described separation block 87 outer walls have lug boss 871, and have a retaining groove that matches with lug boss in screw rod 16 cavity inner wall corresponding positions, certain above-mentioned driving mechanism also can be other structure, as by spline structure or the like,, this structure when separation block rotates, can drive the screw rod rotation as long as making.

The driven axle automechanism assembly 9 that has clearance-adjustable in another screw rod 16 cavitys, as Fig. 5, shown in Figure 7, described driven axle automechanism assembly 9 includes driven axle 91, driven axle 91 1 ends are connected with positioning seat assembly 93 by bearing 92, described positioning seat assembly 93 links to each other with caliper body 2, above-mentioned driven axle 91 afterbody ends are fixed with adjusts seat 94, adjust and be provided with fixed interval cover 96 between seat 94 and the positioning seat assembly 93, be provided with supported spring 95 between fixed interval cover 96 and the positioning seat assembly 93, and adjusting the drive mechanism that is provided with a drive screw rod rotation between seat 94 and screw rod 16 cavity inner walls, being provided with a drive mechanism that drives screw rod 16 rotations between above-mentioned adjustment seat 94 and screw rod 16 cavity inner walls is: described adjustment seat 94 outer walls have lug boss 941, and the corresponding position has a retaining groove that matches with lug boss in screw rod 16 cavitys, certain above-mentioned driving mechanism also can be other structure, as by spline structure or the like,, this structure when separation block rotates, can drive the screw rod rotation as long as making.

Between driving shaft 81 and driven axle 91 ends, be provided with a synchronous driving mechanism, as shown in Figure 8, its structure of above-mentioned synchronous drive mechanism is: the end of described driving shaft 81 is provided with sprocket wheel 19, link together by spline between sprocket wheel 19 and the driving shaft 81, also be provided with sprocket wheel 20 on the described driven axle 91, link together by spline between sprocket wheel 20 and the driven axle 91, between above-mentioned sprocket wheel 19 and sprocket wheel 20, link together by a chain 21, certainly this synchronous drive mechanism is not limited to above-mentioned this structure, can also be to link together by a synchronous gear train between driving shaft 81 and driven axle 91.

This caliper disc brake working procedure and principle are such: during use this caliper disc brake is installed in truck or passenger vehicle before, on the rear axle, brake disc 6 usefulness alloy cast iron manufacturings also are fixed on the wheel, with wheel, push rod acts in the ball-and-socket of pressure arm 5 during brake, make angle of pressure arm 5 swings, pressure arm convex globoidal 51 is through the swing of the center of the relative loam cake 4 of needle bearing, in pressure arm 5 swing process, because pressure arm convex globoidal 51 is eccentric with the center of pressure arm concave arc surface 52, so make concave arc surface 52 centers produce a downward displacement distance, thereby it is descending to make shaft support 14 assemblies overcome the effect of return spring 15 returning place forces, and it is descending to drive briquetting 18, and then it is descending to promote inboard brake pad assembly 3, brake pad assembly 3 is contacted with brake disc 6, act on the opposite force of caliper body 2 simultaneously, make caliper body 2 along two guide pin bushings 26,27 with respect to caliper body support axial float, make the brake pad assembly 3 in the outside press brake disc 6, the brake pad assembly 3 of two sides is compressed with brake disc 6, thereby realized the purpose of braking.

Fit up gap between the breach 85 of described pressure arm 5 and gap positioning seat 84 1 sides equals to brake fully when brake clearance is setting value required screw rod 16 shift motions; after brake disc 6 and brake pad assembly 16 wear and tear; under the situation of brake clearance greater than setting value; then the driving lever 53 on the pressure arm 5 contacts with the breach 85 of gap positioning seat 84 1 sides; and then drive gap positioning seat 84 rotations; at gap positioning seat 84; clutch spring 89 effects between declutch shaft 86 and the driving shaft 81 down; it is descending to promote declutch shaft 86; and the ball 810 between extruding declutch shaft 86 and the separation block 87; thereby drive separation block 84 rotations; and the rotation of separation block 84 can drive driving shaft 81 and screw rod 16 rotations simultaneously; driving shaft 81 is by sprocket wheel 19; 20 and the synchronous drive driven axle 91 of chain 21 and on 94 rotations of adjustment seat; and then the screw rod 16 of both sides is rotated simultaneously; since between screw rod 16 and the shaft support 14 for being threaded; therefore make screw rod 16 relative shaft supports 14 move down certain distance; eliminated the excess gap; after remove in the gap; pressure arm 5 continues pendulum angle under the push rod effect of brake chamber; at this moment brake pad assembly 3 has pressed brake disc 6; driving shaft 81 can't drive screw rod 16 displacements; at this moment the spring 811 between inwall on separation block 84 cavitys and fixed block 88 upper-end surfaces can be extruded; at this moment; separation block 84 relative screw rod 16 cavity inwalls are descending; ball 810 is skidded between declutch shaft 86 and separation block 87; make screw rod 16 can not continue to rotate descending, so played protective action.

When brake discharges, the push rod travelling backwards of brake chamber, pressure arm 5 is return under the effect of return spring 15 below the shaft support 14, briquetting 18 on the screw rod 16 separates with brake pad assembly 3, pressure arm 5 drives gap positioning seat 84 and turns back to initial position (separate counterclockwise and skid), and this moment, brake stopped.

Claims

1, a kind of caliper disc brake, include caliper bracket (1), caliper body (2), brake pad assembly (3), loam cake (4), pressure arm (5), loam cake (4) and caliper body (2) link together, described caliper bracket (1) and caliper body (2) but between by bolt and guide pin bushing slide relative link together; The brake pad assembly (3) of brake disc (6) both sides is pressed on the supporting surface of caliper bracket (1) by friction plate stage clip (7);

It is characterized in that described pressure arm (5) one ends freely are resisted against a side of loam cake (4), loam cake (4) below is provided with shaft support (14), pressure arm (5) the other end is placed between loam cake (4) and the shaft support (14) rotationally, and links together by an eccentric stiffener and the shaft support (14) that shaft support (14) is produced to bottom offset;

Be supported with return spring (15) between described shaft support (14) below and the caliper body (2), has tapped hole in shaft support (14) both sides, its internal thread is connected with screw rod (16), the lower end of described screw rod (16) is connected with briquetting (18) by bearing (17), and briquetting (18) bottom surface and the surperficial contact matching of brake pad assembly (3) are together.

2, caliper disc brake according to claim 1, it is characterized in that described screw rod (16) has a cavity, the driving shaft automechanism assembly (8) that also has clearance-adjustable therein in screw cavity, the driven axle automechanism assembly (9) that has clearance-adjustable in another screw cavity is connected together by a synchronous driving mechanism between described driving shaft automechanism assembly (8) and the driven axle automechanism assembly (9).

3, caliper disc brake according to claim 2, it is characterized in that described driving shaft automechanism assembly (8) includes driving shaft (81), driving shaft (81) one ends are connected with positioning seat assembly (83) and gap positioning seat (84) by bearing (82), described positioning seat assembly (84) links to each other with caliper body (2), positioning seat (84) one sides in gap have breach (85), on the driving shaft (81) of gap positioning seat (84) below, also be provided with declutch shaft (86) and separation block (87), separation block (87) below has a cavity, above-mentioned driving shaft (81) tail end is fixed with fixed block (88), fixed block (88) is arranged in below in separation block (87) cavity, between separation block (87) and screw rod (16) cavity inner wall, be provided with one and drive the drive mechanism that screw rod rotates, in gap positioning seat (84), be provided with overrunning clutch between declutch shaft (86) and the driving shaft (81), between declutch shaft (86) and separation block (87), be provided with free wheel device;

Described driven axle automechanism assembly (9) includes driven axle (91), driven axle (91) one ends are connected with positioning seat assembly (93) by bearing (92), described positioning seat assembly (93) links to each other with caliper body (2), above-mentioned driven axle (91) afterbody end is fixed with adjusts seat (94), adjust between seat (94) and the positioning seat assembly (93) and be provided with supported spring (95), and between adjustment seat (94) and screw rod (16) cavity inner wall, be provided with the drive mechanism that a drive screw rod rotates;

Described synchronous drive mechanism just is arranged between driving shaft (81) and driven axle (91) end;

Has the driving lever (53) that matches with described breach (85) on the described pressure arm (5).

4, caliper disc brake according to claim 3 is characterized in that described overrunning clutch is a clutch spring (89); Its structure of described free wheel device is: be provided with groove in separation block (87) upper-end surface, the lower end surface correspondence of declutch shaft (86) is provided with groove, groove is built-in with ball (810), declutch shaft (86) and separation block (87) combine by ball (810), and are being supported with spring (811) between the inwall on fixed block (88) upper-end surface and separation block (87) cavity.

5, caliper disc brake according to claim 3, it is characterized in that its structure of described synchronous drive mechanism is: the end of described driving shaft is provided with sprocket wheel (19), also be provided with sprocket wheel (20) on the described driven axle (91), between above-mentioned sprocket wheel (19,20), link together by a chain (21).

6, caliper disc brake according to claim 3, it is characterized in that being provided with between described separation block (87) and screw rod (16) cavity inner wall one drives the drive mechanism that screw rod (16) rotates and be: described separation block (87) outer wall has lug boss (871), and the corresponding position has one and the retaining groove that matches of lug boss (871) screw rod (16) cavity in.

7, caliper disc brake according to claim 3, it is characterized in that described adjust is provided with one and drives the drive mechanism that screw rod rotates and be between seat (94) and screw rod (16) cavity inner wall: described adjustments seat (a 94) outer wall has lug boss (941), and the interior corresponding position of screw rod (16) cavity has one and the retaining groove that matches of lug boss (941).

8, caliper disc brake according to claim 1, it is characterized in that described eccentric stiffener is: the convex globoidal (51) of pressure arm (5) is rotatably connected to loam cake (4) by needle bearing (22), the concave arc surface (52) of described pressure arm (5) links together by steel ball (23) and shaft support (14), and the center of described convex globoidal (51) and concave arc surface (52) is eccentric.