CN101460759B - Drum brakes - Google Patents
Drum brakes Download PDFInfo
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- CN101460759B CN101460759B CN2007800203095A CN200780020309A CN101460759B CN 101460759 B CN101460759 B CN 101460759B CN 2007800203095 A CN2007800203095 A CN 2007800203095A CN 200780020309 A CN200780020309 A CN 200780020309A CN 101460759 B CN101460759 B CN 101460759B
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- brake
- pole
- lever
- brake shoe
- engages
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Abstract
A drum brake has a pair of brake shoes (40) moveable radially outwardly into contact with an associated brake drum to provide a handbrake function by a cross strut (100) which acts between the brake shoes or between pivoting brake operating levers (14) which actuate the brake shoes. A handbrake lever (18) is pivoted on one brake shoe or brake operating lever (14) and contacts one end of the strut to displace the other brake shoe or brake operating lever towards the drum to apply the associated shoe against the drum and by reaction through the strut to also force the other brake shoe or brake operating lever toward the drum to apply the other shoe against the drum. The strut (100) is in two parts (101,102), one part being connected for movement with each respective brake shoe or operating lever, the strut parts having inter-engageable formations in the form of teeth (103, 104) which when engaged allow the strut (100) to transmit axial force between the shoes or operating levers. Bias means (105,106) are provided for biasing the strut parts apart to disengage the inter-engageable formations to disable the strut, the inter-engageable formations (103, 104) being engaged when the handbrake lever (18) is operated to connect the strut parts (101,102) to allow the brake to be applied and being disengaged when the handbrake lever is released so that the strut parts can disengage and move apart with the brake shoes or brake operating levers to adjust the effective length of the strut as the brake shoes wear.
Description
Technical field
The present invention relates to a kind of drum brake; Said drum brake has a pair of brake shoe; But said brake shoe radially outward moves and the contact of relevant brake drum; So that by lateral strut the parking brake function is provided, said pole acts between the brake shoe, or activates between the pivot brake activation lever of brake shoe; Hand brake lever; Said hand brake lever pivots on a brake shoe or brake activation lever; The end that said hand brake lever contacts said pole to be moving another brake shoe or brake activation lever and then relevant hoof is pressed against on the said drum towards said drum, and also another brake shoe or brake activation lever promoted so that another hoof is pressed against on the said drum towards said drum through the reaction of said pole.
Background technique
This drum brake is well-known, is called said type hereinafter.The example of the drum brake of said type is shown in claimant's B. P. No.GB2407349, and wherein pole directly contacts brake shoe.Brake shoe is shown in claimant's common pending application PCT/1B2006/001032 and GB0525585.6 by the example of the drum brake of the brake activation lever actuating that pivots.
Summary of the invention
The object of the present invention is to provide the modified version of the drum brake of said type.
Thereby; According to the present invention, a kind of drum brake is provided, said drum brake has a pair of brake shoe; But said brake shoe radially outward moves and the contact of relevant brake drum; So that by lateral strut the parking brake function is provided, said pole acts between the brake shoe, or activates between the pivot brake activation lever of brake shoe; Hand brake lever; Said hand brake lever pivots on a brake shoe or brake activation lever; Said hand brake lever contacts an end of said pole so that another brake shoe or brake activation lever are moved and then relevant hoof is pressed against on the said drum towards said drum; And the reaction through said pole also promotes another brake shoe or brake activation lever so that another hoof is pressed against on the said drum towards said drum; Said brake features is that said pole is two-part, and a part is connected with each corresponding brake shoe or operating handle and is used to move; Said pole partly has the structure that can engage one another, and the said structure that engages one another allows pole between hoof or operating handle, to transmit axial force when engaging; Biased member; Be used for pole part bias voltage is opened, thereby make pole forfeiture effect so that the structure that can engage one another is separated, the said structure that engages one another engages when hand brake lever is handled; So that pole partly be connected and then allow brake; The said structure that engages one another is separated when hand brake lever is released, and makes the pole part to be separated and also can remove with brake shoe or brake activation lever, regulates the effective length of pole when wearing and tearing with convenient brake shoe.
The said structure that engages one another engages by means of the wedge system that is activated by hand brake lever.
A pole partly is loaded with tubular structure; Another pole partly slides through said tubular structure; The structure that can engage one another faces each other, wedge system also with respect to said pole part substantially longitudinally direction slide through said tubular structure, said tubular structure has cam face; Said cam face cooperates with said wedge system, so that when hand brake lever pivots with brake, impel the said structure that engages one another to engage.
Said voussoir is connected with a said brake shoe or brake activation lever, thereby when hand brake lever moved, said voussoir moved with respect to said cam face, engages to impel the said structure that engages one another.
Said wedge system can be handled by actuating rod; Said actuating rod is being articulated between its end on a said brake shoe or the said brake activation lever; One end of actuating rod is connected with said wedge system; The other end of said bar is connected with hand brake lever and is used for pivoting,,, hand brake lever make said wedge system move through said tubular structure when pivoting with execution parking brake function; Cooperating with said cam face and to impel the said structure that engages one another to engage so that said pole can be between said hoof or brake activation lever transmission power with brake.
Preferably, two poles partly have the structure that can engage one another, the tooth array format of this structure for engaging one another, and this tooth array is positioned on the aspectant surface of pole part.
Each corresponding pole part preferably is connected with corresponding brake shoe or brake activation lever by means of extension spring, and said extension spring spurs said pole part towards corresponding brake shoe or operating handle.
Said wedge system is connected by means of the said end of spring assembly and said voussoir actuating rod or a said brake shoe or brake activation lever, and said spring assembly is tightened up when said hand brake lever pivots with brake.
In replaceable form; Two pole parts can slide through tubular structure; The end of a pole part has the voussoir part; Said voussoir part cooperates with cam face on the tubular structure, so that when said hand brake lever is pivoted with brake, impel the said structure that engages one another to engage.
In above-mentioned replaceable scheme; Said tubular structure preferably is connected with an end of actuating rod; Said actuating rod is being articulated between its end on a said brake shoe or the said brake activation lever; The other end of said actuating rod is connected with hand brake lever and is used for pivoting, and when hand brake lever pivots, carries out the parking brake function, makes said tubular structure partly move with respect to pole; And then cause said cam face to act on the voussoir part of said pole part, impel the said structure that engages one another to engage so that said pole can be between said hoof or brake activation lever transmission power so that brake.Said tubular structure also can be connected with said actuating rod by means of spring assembly.
In another form, two poles part pivots away from each other so that the said structure that engages one another is separated by means of biased member, and when handling said hand brake lever brake towards pivoting so that the said structure that engages one another engages each other.
In this layout; Two pole parts preferably pivot away from each other by means of spring assembly; Said spring assembly keeps an abutment surface on the pole part to contact with the fit adjacent on a brake shoe or the operating handle is surperficial when hand brake lever discharges; The setting of said abutment surface and be located such that when said abutment surface by spring assembly during towards tractive each other, said spring assembly rotates, so that a said pole partly partly pivots with respect to another pole.
Preferably; Said hand brake lever acts on when being handled brake on the said pole part; So that this pole is partly applied opposite rotation; So that said pole part is partly pivoted with respect to another pole and the said structure that engages one another is engaged, thereby make that said pole can brake.
Equally preferably; Said pole part is installed with respect to another pole part by means of the pin on the pole part pivotly; Slide in the groove of said pin on another pole part; Thereby make two pole parts can be pivoted relative to each other and also relative to each other slide, so that consider the variation mobile and effective length of said pole when brake shoe weares and teares of two pole parts when hand brake lever is released.
Description of drawings
Now, with reference to accompanying drawing, only by way of example mode present invention is described, in the accompanying drawings:
Fig. 1 shows the side view according to break of the present invention, and wherein, break is in not actuation condition, and drum and backboard are removed;
Fig. 2 shows the side view of the break of the Fig. 1 that is in actuation condition;
Fig. 3 shows from the side view of the break of another Fig. 1 that looks sideways;
Fig. 4 shows from the side view of the break of another Fig. 2 that looks sideways;
Fig. 5 shows the detail drawing of the brake actuating pole of the break that is used for Fig. 1 to 4;
Fig. 6 shows the support connecting piece of the break that is used for Fig. 1 to 5;
Fig. 7 shows the detail drawing of the operating handle pivot pin of the break that is used for Fig. 1 to 5;
Fig. 8 and 9 shows the detail drawing of interchangeable pressed metal support connecting piece;
Figure 10 shows the schematic form of pivot rods deflection in the break of the support connecting piece that does not have Fig. 6 or 8 and 9;
Figure 11 to 13 shows the detail drawing that is used for brake shoe is fastened to the structure on the relevant operating handle of the break of Fig. 1 to 5;
Figure 14 shows the conventional drum brake of employing according to actuating pole of the present invention;
Figure 15 is the perspective view of the part of break shown in Figure 14;
Figure 16 shows the replaceable form according to brake actuating pole of the present invention;
Figure 17 shows the side view of employing according to the break of the another form of actuating pole of the present invention;
Figure 18 shows the perspective view of the actuating pole of Figure 17 with vast scale more;
Figure 19 is the view of the actuating pole on the direction of arrow A of Figure 18, and it shows that pole partly is in the situation of being separated;
Figure 20 is the view of the actuating pole on the direction of arrow B of Figure 18, and it shows that also pole partly is in the situation of being separated;
Figure 21 is the view on the direction of arrow A, and it shows that pole partly engages;
Figure 22 and 23 is respectively the enlarged view of the part of Figure 19 and 20;
Figure 24 and 25 show on pole part with relevant brake shoe on the detail drawing of abutment surface, said abutment surface makes that when engaging pole partly pivots.
Figure 26 shows interchangeable abutment structure; With
Figure 27 shows the variations of the pole shown in Figure 17 to 26.
Embodiment
With reference to accompanying drawing, the drum brake of type described in common unsettled PCT patent application PCT/1B2006/001032 that accompanying drawing shows the claimant and the PCT/1B06/003907.
Each abutment structure 13 forms the groove structure of U-shaped substantially, and a sidepiece 30 contacts with backboard, and the bottom of groove has hole 31, and the part 14c of each operating handle 14 extends through said hole 31.
Each brake shoe 12 comprises friction pad 40 and metal support/supporting element 41.Pad supports 41 has lug 43, and lug 43 sense of rotation according to brake drum when brake contacts abutment surface 45a or 45b on the abutment structure 13.The retarding torque that this contact opposing is produced. Abutment surface 45a and 45b are arranged on the adjacent part 45 of each abutment structure 13; And the bottom that extends through abutment structure enters into the side of the U-shaped structure adjacent with said bottom, so that good balance contact area is provided between brake shoe 12 and abutment structure 13.These adjacent parts 45 circumferentially connect through the part 46 of abutment structure, and it has formed the opposite side 32 of U-shaped groove structure.When brake, this link 46 between the adjacent part 45 supports adjacent part and has stoped its relative circumferential deflection, can resist the retarding torque that is produced better like this and firmer brake structural can be provided.
The pin 16 that bar 14 is pivotably mounted on the backboard is connected by support connecting piece 75, and support connecting piece 75 extends between the free end 16a of pin 16, helps 16 deflections with respect to backboard of control pin during with convenient brake.Support connecting piece 75 is bent to increase the gap around the relevant wheel wheel hub.In some device, have enough spaces and let link 75 adopt straight form.
Figure 10 schematically shows when brake, and the free end 16a of pin 16 is to the trend (being shown as dotted line) of deflection each other.Through providing support link 75, this trend is significantly reduced, and has therefore improved the rigidity of break greatly.If do not use support connecting piece 75 that the actuating displacement loss of (selling the result of 16 deflections) will take place owing to reduced, this has greatly improved the response of break.Mount pin 16 reduces also to help to reduce pin is installed in the possibility that lost efficacy on the backboard with respect to the deflection of backboard 11.The raising of break rigidity also makes the thickness of backboard can reduce (for example, from 2.5mm to 2.0mm), and this has significantly reduced the cost of material of break.
Fig. 7 has shown one the details of selling in 16.The free end 16a of said pin is riveted on support connecting piece 75 tops with on the first shoulder 16c that support connecting piece 75 is fixed on each pin.When break was assembled, each pin the other end of 16 was riveted on the backboard 11 at 16d place and is clipped in the sidepiece 30 with each abutment structure 13 between the backboard and the second shoulder 16e that each is sold.Bar 14 pivots on the part 16f of each pin, and this part 16f is between the 3rd shoulder 16g of space washer 51 and each pin
Fig. 8 and 9 has shown the alternative form of support connecting piece 75, and it passes through stamped, and comprises that form is the reinforced structure of the longitudinal extension of compression spine 76.
Figure 11 to 13 has shown that a kind of spring clip 80 that uses is fixed to the structure on the relevant brake rod 14 with brake shoe 12, and spring clip 80 riveted joints (through hole 80a) or employing alternate manner are fixed on the back of brake shoe 12.Folder 80 comprises two or more convexities 81, and these convexities 81 extend into and are arranged in the groove or groove 82 that basically along the circumferential direction extends on each bar 14 both sides.Four such convexities in the structure that is shown, have been used, but can be, on every side of bar 14 one only with two convexities.Alternately, can only use a convexity, its only with groove 14 1 sides on a groove engage.Like this; Said brake shoe just is maintained on the bar 14; But can when braking, in limited range, move (referring to the arrow C among Figure 11) in a circumferential direction relative to bar; With the optimum position of acquisition, thereby guarantee between brake shoe during the operating life of brake shoe and relevant brake drum, to have excellent contact with respect to bar.
In the structure shown in Figure 11 to 13, around said folder 80 also extends with the lug 43 that is clipped in said brake shoe at the 80b place, thereby between brake shoe and abutment surface 45a and 45b, provide Elastic Contact to reduce the vibration/noise of pad.
According to the present invention, have two-part pole 100 and between hand brake lever 18 and left-hand side operating handle 14, extend, as shown in Figure 1.Pole 100 has the first portion 101 and the second portion that contacts left-hand side operating handle 14 102 that contacts with hand brake lever 18.Be shown in Fig. 5 best, part 101 and 102 adjacently situated surfaces have the structure that engages one another that is respectively tooth array 103 and 104 forms.These teeth are biased into each other and are separated by being carried on sheet spring 105 and 106 on pole part 101 and 102 respectively usually.Pole part 101 pulls to right brake activation lever by spring 118, and is as shown in Figure 1, and pole part 102 pulls to left brake activation lever by spring 119.
Owing to be applied to the lever ratio on the bar 113, the use of voussoir actuating rod 113 can be changed the stroke of voussoir 109 and impose on the power of voussoir 109 from bar 18.Equally, the use of bar 113 also applies power with appropriate direction from bar 18 and gives voussoir 109, so that the tooth on the pole part engages.
When hand brake lever 18 is released; Voussoir 109 as shown in Figure 1 being moved to the left; Make tooth array 103 and 104 under the effect of sheet spring 105 and 106, be separated, and the pole part 101 and 102 that breaks away from follows bar 14 and move, they are connected with bar 14 with 119 via spring 118.Thereby when brake shoe 12 wearing and tearing, the position that pole part 101 is connected with 102 can automatically be regulated when bar 18 pivots, thereby makes the pole part engage to reduce stacked mode gradually.Thereby the whole life period that the required pole of engage brakes moves axially at brake shoe keeps roughly constant.
Figure 14 and 15 shows the of the present invention replaceable form that is applied to conventional drum brake; Drum brake has two brake shoes 212; Brake shoe 212 can engage with relevant bulging (not shown) by means of oil hydraulic cylinder 215 or hand brake lever 218; Hand brake lever 218 pivots on right-hand side brake shoe 212, and operates via having 300 pairs of brake shoes of two-part actuating pole.
When break is released; The pole part 301 that is loaded with cam portion 310 is with respect to voussoir 309 shown in figure 15 moving right; Thereby make tooth array 303 and 304 under the effect of sheet spring 305 and 306, be separated; The pole part 301 and 302 that breaks away from is followed brake shoe 212 and is carried out rollback and move, and they are connected with brake shoe 212 via the spring (not shown).Thereby when 212 wearing and tearing of brake shoe pad, the position that pole part 301 is connected with 302 is automatically adjusted when bar 218 pivots, thereby makes the pole part engage with the overlapping configuration mode that reduces gradually.Thereby the life period that the required pole of engage brakes moves axially at whole pad keeps roughly constant.
Should be understood that, through cancellation bar 113 and voussoir 109 is connected to right-hand side operating handle 14 via spring 111, do not use the configuration shown in Figure 14 and 15 of voussoir actuating rod 113 also can be used in Fig. 1 in the break of 13 shown types.
Figure 16 shows the another form according to pole 400 of the present invention, and wherein the first pole part 401 keeps in touch by means of spring 118 and right-hand side brake activation lever 14, and the second pole part 402 keeps in touch by means of spring 119 and left-hand side brake activation lever 14.Tubular structure 407 with cam portion 410 receive pole parts 401 and 402 the two, the end of pole part 401 has voussoir part 409, voussoir part 409 cooperates with cam portion 410.Tubular structure 407 is connected with actuating rod 413 by means of spring 111, and 414 places of actuating rod 413 on hand brake lever 18 pivot.
Should be understood that be connected to right-hand lever 14 through cancellation bar 413 and with voussoir 409 via spring 111, actuating rod 413 just can not used pole 400.
Similarly, pole 400 is used in the conventional drum brake with the mode that is similar to the pole 300 shown in Figure 14 and 15, can be with bar 413, also can not be with bar 413.
Equally, through bar 113 is directly installed on the right-hand side brake shoe, Fig. 1 can be used for conventional drum brake with actuating rod 113 to the pole 102 and 103 of 13 shown types.
Figure 17 to 26 shows the another form according to pole 500 of the present invention, and wherein pole 500 has the first pole part 501, and the said first pole part 501 keeps in touch by means of spring 118 and right-hand side brake activation lever 14; With the second pole part 502, the said second pole part 502 keeps in touch by means of spring 119 and left-hand side brake activation lever 14. Pole part 501 and 502 also has tooth array 503 and 504, and when hand brake lever 18 was handled with engage brakes, tooth array 503 and 504 contacted with each other.
Be shown in Figure 22 to 25 best, pole part 501 has inclination abutment surface 501a (referring to Figure 24), and inclination abutment surface 501a is on the edge 14e that is forced into right-hand side brake activation lever 14 under the effect of spring 118.This causes pole part 501 to pivot counterclockwise with respect to pole part 502 around pin 505; Shown in Figure 22 and 25, thus make tooth 503 and 504 not engage and two pole parts 501 and 502 can be when parking brake be released or the rollback of following brake activation lever when carrying out hydraulic braking move.Make that this pivot of the pole part 501 that tooth 503 and 504 is separated is that little negative moment arm V (being marked among Figure 22) by spring 118 causes.
When handling hand brake lever 18 brake, hand brake lever applies positive moment and gives parking brake part 501, causes part 501 to pivot counterclockwise with respect to pole part 502 around pin 505, makes tooth 503 and 504 engage, thereby allows pole 500 brake.This positive moment illustrates with W in Figure 23.
Figure 26 shows the replacedly form of the adjacent portion 501b that can be used on the pole part 501, under the effect of spring 118, to produce negative moment of rotation once more, so that tooth 503 and 504 is separated.
It is understandable that the benefit of the replaceable form of above-mentioned regulator pole 500 is exactly tooth on the pole part to be engaged do not rely on wedging action.
If hope, the additional bias device of secondary spring 118 can be set, be separated when hand brake lever is released, to make tooth 503 and 504 easily.This additional bias device can act directly between pole part 501 and 502 up to the left side of pivot pin 505, so that the disengaging of tooth more initiatively.
Figure 27 shows the variations of the pole shown in Figure 17 to 26, and its medium-height trestle 506 comprises additional lead arm 506a, and lead arm 506a helps to guarantee that tooth 503 and 504 keeps better aiming at during pole part 501 and 502 pivots.Arm 506a also comprises projection 506b, and projection 506b pivots away from each other to limit two pole parts 501 and 502 as block, and it is shown in figure 27, and Figure 27 shows tooth 503 and 504 and is separated.
Claims (16)
1. a drum brake has a pair of brake shoe (212) or brake shoe (12), said brake shoe (212) or brake shoe (12) by means of lateral strut (100) but radially outward moves and the contact of relevant brake drum; So that the parking brake function is provided; Said pole (100) acts between the brake shoe (212) or activates between the pivot brake activation lever (14) of brake shoe (12), and hand brake lever (18) goes up pivot at first brake shoe (212) or first brake activation lever (14), and said hand brake lever contacts an end of said pole (100) so that second brake shoe (212) or second brake activation lever (14) are moved and then second brake shoe (212) or second brake shoe (12) are pressed against on the said drum towards said drum; And the reaction through said pole (100) also promotes first brake shoe (212) or first brake activation lever (14) so that first brake shoe (212) or first brake shoe (12) are pressed against on the said drum towards said drum; Said break is characterised in that: said pole (100) is first and second poles parts (101,102), first and second poles part (101; 102) its corresponding brake shoe of each in (212) or brake activation lever (14) connect and are used to move; Said first and second poles parts (101,102) have the structure (103,104) that can engage one another; The said structure that engages one another (103; 104) when engaging, allow pole (100) between brake shoe (212) or brake activation lever (14), to transmit along the axial force of the axial direction of pole (100), biased member (105,106) is used for first and second poles part (101; 102) bias voltage is opened; So that the structure that can engage one another (103,104) thus be separated and make pole (100) forfeiture effect, the said structure that engages one another (103; 104), hand brake lever (18) engages when being handled; So that first and second poles part (101,102) be connected and then allow brake, the said structure that engages one another (103; 104), hand brake lever is separated when being released; Make first and second poles part (101,102) to be separated and can remove, regulate the effective length of pole (100) during with friction pad (40) wearing and tearing of convenient brake shoe (212) or brake shoe (12) with brake shoe (212) or brake activation lever (14).
2. break according to claim 1 is characterized in that, the said structure that engages one another (103,104) engages by means of the voussoir (109) that is activated by hand brake lever (18).
3. break according to claim 2 is characterized in that: first pole part (101) is loaded with tubular structure (107), and second pole part (102) slides through said tubular structure (107); The structure (103 that can engage one another; 104) face each other, voussoir (109) also with respect to said first and second poles parts (101,102) substantially longitudinally direction slide through said tubular structure (107); Said tubular structure (107) has cam face (110); Said cam face (110) cooperates with said voussoir (109), so that when hand brake lever (18) pivot brake, impel the said structure that engages one another (103,104) to engage.
4. break according to claim 3; It is characterized in that: said voussoir (109) is connected with said first brake shoe (212) or first brake activation lever (14); Thereby when hand brake lever (18) moves; Said voussoir (109) is mobile with respect to said cam face (110), engages to impel the said structure that engages one another (103,104).
5. break according to claim 3; It is characterized in that: said voussoir (109) is handled by actuating rod (113); Said actuating rod (113) is articulating (114) on said first brake shoe (212) or said first brake activation lever (14) between its end; One end (112) of actuating rod (113) is connected with said voussoir (109); The other end of said actuating rod (115) is connected (116) and is used for pivoting with hand brake lever (18), pivoting in hand brake lever makes said voussoir (109) move through said tubular structure (107) when carrying out the parking brake function, to cooperate with said cam face (110) and to impel the said structure that engages one another (103; 104) engage so that said pole (100) can be between said brake shoe (212) or brake activation lever (14) transmission power with brake.
6. according to any one described break in the claim 1 to 5; It is characterized in that: each corresponding pole part (101; 102) be connected said extension spring (118 by means of extension spring (118,119) with corresponding brake shoe (212) or brake activation lever (14); 119) said pole part (101,102) is spurred towards corresponding brake shoe (212) or brake activation lever (14).
7. break according to claim 3; It is characterized in that: said voussoir (109) is connected with said first brake shoe (212) or first brake activation lever (14) by means of spring assembly (111), and said spring assembly (111) is tightened up when said hand brake lever (18) pivots with brake.
8. break according to claim 2; It is characterized in that: first and second poles part (401; 402) all slide through tubular structure (407), the end of first pole part (401) has voussoir (409), and said voussoir (409) cooperates with cam face (410) on the tubular structure (407); So that when said hand brake lever (18) pivots with brake, impel the said structure that engages one another (403,404) to engage.
9. break according to claim 8; It is characterized in that: said tubular structure (407) is connected with an end of actuating rod (113); Said actuating rod (113) is articulating (114) on said first brake shoe (212) or said first brake activation lever (14) between its end, the other end of said actuating rod (113) is connected with hand brake lever (18) and is used for pivoting, when hand brake lever pivots with execution parking brake function; Make said tubular structure (407) with respect to said first and second poles part (401; 402) move, cause said cam face (410) to act on the voussoir (409) of said first pole part (401), to impel the said structure that engages one another (403; 404) engage, so make said pole (400) can be between said brake shoe (212) or brake activation lever (14) transmission power with brake.
10. break according to claim 9 is characterized in that: said tubular structure (407) is connected with said actuating rod (113) by means of spring assembly (111).
11. break according to claim 1; It is characterized in that: first and second poles part (501; 502) pivot away from each other so that the said structure that engages one another (503 by means of biased member (118); 504) be separated, when handling said hand brake lever (18) brake their pivot near each other so that the said structure that engages one another engage.
12. break according to claim 11; It is characterized in that: said biased member (118) is a spring assembly; Said spring assembly keeps the abutment surface (501a) on first pole part (501) to contact the abutment surface (14e) of the cooperation on first brake shoe (212) or first brake activation lever (14) when hand brake lever is released; Said abutment surface setting and be located such that said spring assembly (118) is rotated during towards tractive each other by spring assembly at said abutment surface is so that said first pole part (501) pivots with respect to second pole part (502).
13. according to claim 11 or 12 described breaks; It is characterized in that: said hand brake lever (18) acts on said first pole part (501) when being handled brake; So that said first pole part (501) pivots towards second pole part (502); And the said structure that engages one another (503,504) is engaged, thereby make that said pole (500) can brake.
14. break according to claim 11; It is characterized in that: said first pole part (501) is installed with respect to second pole part (502) by means of the pin (505) that is positioned on said first pole part (501) pivotly; Slide in the groove (507) of said pin (505) on second pole part (502); Thereby first and second poles part (501; 502) can be pivoted relative to each other and also can relative to each other slide, so that consider the partly variation of moving and when friction pad (40) weares and teares, consider the effective length of said pole (500) of (501,502) of first and second poles when being released in hand brake lever (18).
15. break according to claim 1 is characterized in that: the said structure that engages one another (103,104) is included in first and second poles part (101,102; 201,202; 301,302; 401,402; 501,502) the aspectant lip-deep tooth array (103,104 that engages one another; 203,204; 303,304; 403,404; 503,504).
16. break according to claim 5; It is characterized in that: said voussoir (109) is connected with a said end (112) of actuating rod (113) by means of spring assembly (111), and said spring assembly (111) is tightened up when said hand brake lever (18) pivots with brake.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0610780A GB0610780D0 (en) | 2006-06-01 | 2006-06-01 | Drum brakes |
| GB0610780.9 | 2006-06-01 | ||
| GB0702538.0 | 2007-02-09 | ||
| GB0702538A GB0702538D0 (en) | 2007-02-09 | 2007-02-09 | Drum brakes |
| PCT/IB2007/001826 WO2008139244A2 (en) | 2006-06-01 | 2007-05-17 | Drum brakes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101460759A CN101460759A (en) | 2009-06-17 |
| CN101460759B true CN101460759B (en) | 2012-10-10 |
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ID=36694717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800203095A Expired - Fee Related CN101460759B (en) | 2006-06-01 | 2007-05-17 | Drum brakes |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101460759B (en) |
| GB (1) | GB0610780D0 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533989B (en) * | 2014-12-01 | 2017-01-04 | 奇瑞汽车股份有限公司 | Driving neck is from hoof parking duo two leading shoe brake |
| DE102015013611A1 (en) * | 2015-10-21 | 2017-04-27 | Liebherr-Aerospace Lindenberg Gmbh | Actuator for a high-lift system of an aircraft |
| JP6807053B2 (en) * | 2017-04-17 | 2021-01-06 | いすゞ自動車株式会社 | Spring moving tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB768775A (en) * | 1955-04-15 | 1957-02-20 | Joseph Flueler | Device for taking up excess play between two members |
| DE2606925A1 (en) * | 1975-02-20 | 1976-09-09 | Tokico Ltd | INDEPENDENT BRAKE SHOE ADJUSTMENT DEVICE FOR DRUM BRAKES |
| CN1198134A (en) * | 1996-01-20 | 1998-11-04 | 阿尔科库伯股份有限公司 | Parking brake for motor vehicles, vehicle trailers or similar objects |
| CN1528626A (en) * | 2003-09-28 | 2004-09-15 | 重庆红宇精密工业有限责任公司 | Self-adjusting drum brake at parking |
-
2006
- 2006-06-01 GB GB0610780A patent/GB0610780D0/en not_active Ceased
-
2007
- 2007-05-17 CN CN2007800203095A patent/CN101460759B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB768775A (en) * | 1955-04-15 | 1957-02-20 | Joseph Flueler | Device for taking up excess play between two members |
| DE2606925A1 (en) * | 1975-02-20 | 1976-09-09 | Tokico Ltd | INDEPENDENT BRAKE SHOE ADJUSTMENT DEVICE FOR DRUM BRAKES |
| CN1198134A (en) * | 1996-01-20 | 1998-11-04 | 阿尔科库伯股份有限公司 | Parking brake for motor vehicles, vehicle trailers or similar objects |
| CN1528626A (en) * | 2003-09-28 | 2004-09-15 | 重庆红宇精密工业有限责任公司 | Self-adjusting drum brake at parking |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0610780D0 (en) | 2006-07-12 |
| CN101460759A (en) | 2009-06-17 |
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| C10 | Entry into substantive examination | ||
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Granted publication date: 20121010 Termination date: 20170517 |