CN201714872U - Hydraulic drum brake mechanism - Google Patents

Hydraulic drum brake mechanism Download PDF

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Publication number
CN201714872U
CN201714872U CN201020194291XU CN201020194291U CN201714872U CN 201714872 U CN201714872 U CN 201714872U CN 201020194291X U CN201020194291X U CN 201020194291XU CN 201020194291 U CN201020194291 U CN 201020194291U CN 201714872 U CN201714872 U CN 201714872U
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CN
China
Prior art keywords
brake shoes
piston
hollow piston
brake
oil cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201020194291XU
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Chinese (zh)
Inventor
郭荣彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyang Industry Co Ltd
Original Assignee
Sanyang Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyang Industry Co Ltd filed Critical Sanyang Industry Co Ltd
Priority to CN201020194291XU priority Critical patent/CN201714872U/en
Application granted granted Critical
Publication of CN201714872U publication Critical patent/CN201714872U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A hydraulic drum brake mechanism is characterized in that a fixed base is arranged on a brake disc. A cylinder is arranged on the brake disc. A hollow piston is movably arranged in the cylinder and is provided with an annular accommodating part. The piston is movably arranged in the cylinder and is provided with a stud. The stud is surrounded by the hollow piston and is provided with a threaded part. A spring plate is slidably arranged in the annular accommodating part and is connected between the annular accommodating part and the threaded part in a propping mode. A retaining ring is sleeved in the hollow piston and is adjacently connected with the annular accommodating part. A first brake shoe is provided with a first end part and a second end part. The first end part is connected with the hollow piston in a propping way. The second brake shoe is provided with a third end part and a fourth end part. The third end part is connected with the piston in a propping way. The second and the fourth end parts are connected with the fixed base in a propping way. The utility model has the advantage that the assembling process of the first and the second brake shoes is simple and convenient.

Description

The hydraulic drum braking mechanism
Technical field
The utility model relates to a kind of hydraulic drum braking mechanism, particularly a kind of easily assembled hydraulic drum braking mechanism.
Background technique
See also Fig. 1, Fig. 2 A, Fig. 2 B, Fig. 2 C and Fig. 2 D, a kind of known hydraulic drum braking mechanism 1 mainly includes a wheel hub 10, a brake disc 15, a positioning seat 16, an oil cylinder 20, a first piston 31, one first oil sealing 41, one second piston 32, one second oil sealing 42, one first brake shoes 50, one second brake shoes 60, two extension springs 70 and a location device 80.
Wheel hub 10 is arranged on the wheel (not shown), and wheel hub 10 can rotate synchronously with wheel.
Brake disc 15 is connected in a vehicle frame (not shown), and brake disc 15 is sheathed among the wheel hub 10.At this, the center of rotation of wheel hub 10 overlaps with the center of brake disc 15.
Positioning seat 16 is arranged on the brake disc 15.
Oil cylinder 20 is arranged on the brake disc 15, and oil cylinder 20 has a grease chamber 21.At this, accommodate the brake-fluid (not shown) in the grease chamber 21.
As shown in Figure 1, first piston 31 is arranged among the grease chamber 21 of oil cylinder 20 in the mode that moves.In addition, first oil sealing 41 is connected in the inwall of oil cylinder 20, and first oil sealing 41 is sheathed on the first piston 31.At this, first oil sealing 41 is to be used for preventing that the brake-fluid in the grease chamber 21 from leaking to outside the oil cylinder 20.
Second piston 32 also is arranged among the grease chamber 21 of oil cylinder 20 with move mode.In addition, second oil sealing 42 also is the inwall that is connected in oil cylinder 20, and second oil sealing 42 is sheathed on second piston 32.Similarly, second oil sealing 42 is to be used for preventing that the brake-fluid in the grease chamber 21 from leaking to outside the oil cylinder 20.
First brake shoes 50 has a first end 51, a second end 52 and one first friction material portion 55.First end 51 is with respect to the second end 52, and first end 51 is connected to first piston 31.The second end 52 is connected in positioning seat 16 in the mode of butt.The first friction material portion 55 takes shape on the outer rim of first brake shoes 50.
Second brake shoes 60 is with respect to first brake shoes 50, and second brake shoes 60 has one the 3rd end 63, one the 4th end 64, one second friction material portion 65 and an open-work 66.The 3rd end 63 is with respect to the 4th end 64, and the 3rd end 63 is connected to second piston 32.The 4th end 64 is that the mode with butt is connected in positioning seat 16.The second friction material portion 65 takes shape on the outer rim of second brake shoes 60.Open-work 66 takes shape between the 3rd end 63 and the 4th end 64.
Two extension springs 70 all are connected between first brake shoes 50 and second brake shoes 60, and it can make win brake shoes 50 and second brake shoes 60 keep drawing close in opposite directions.
Shown in Fig. 1, Fig. 2 A, Fig. 2 B, Fig. 2 C and Fig. 2 D, positioning device 80 is made up of one first element 81, one second element 82, one first spring 83 and one second spring 84.
First element 81 is to be connected in first brake shoes 50 by first spring 83, and first element 81 has an open-work 81a and one first 81b of tooth portion.
Second element 82 has a hook part 82a, a pillar 82b and one second 82c of tooth portion.Hook part 82a is arranged among the open-work 66 of second brake shoes 60.Pillar 82b is arranged among the open-work 81a of first element 81 in the mode of sliding.Second spring 84 is connected between the pillar 82b of first element 81 and second element 82.At this, by the elastic force that second spring 84 is provided, second 82c of tooth portion of second element 82 can keep engagement with first 81b of tooth portion of first element 81.
As shown in Figure 1, when a hydraulic pressure that brake-fluid is set up by a general braking pump (not shown) and when being sent in the grease chamber 21 of oil cylinder 20, it will order about first piston 31 and second piston 32 relative to away from moving, thereby to make win brake shoes 50 and second brake shoes 60 be that pivot point is strutted with positioning seat 16 respectively, and then the second friction material portion 65 of the first friction material portion 55 of the brake shoes 50 of winning and second brake shoes 60 is contacted with wheel hub 10 respectively and produce braking force.Shown in Fig. 2 B, in the mobile process of wheel hub 10 (or towards right side), its open-work 66 can prop up or spur the hook part 82a of second element 82 in second brake shoes 60.Shown in Fig. 2 C, in the mobile process of wheel hub 10 (or towards left side), first 81b of tooth portion of first element 81 can separate with second 82c of tooth portion of second element 82 in first brake shoes 50.At this, since the hook part 82a of second element 82 be subjected to second brake shoes 60 open-work 66 prop up restriction, so second element 82 can be that the center rotates an angle with its pillar 82b, thereby make first 81b of tooth portion of the element 81 of winning and second 82c of tooth portion of second element 82 that slippage phenomenon take place.
When general braking pump is released and when this hydraulic pressure is disappeared, shown in Fig. 1 and Fig. 2 D, two extension springs 70 can force first brake shoes 50 and second brake shoes 60 to be drawn close in opposite directions, and then can force the second friction material portion 65 of the first friction material portion 55 of first brake shoes 50 and second brake shoes 60 to separate with wheel hub 10 and can force the first piston 31 and second piston 32 to move in opposite directions.It should be noted that, owing to be subjected to the restriction of positioning device 80, the amount of movement that first brake shoes 50 and second brake shoes 60 are retracted by extension spring 70 at every turn all is maintained fixed, and can be because of the first friction material portion 55 and the 65 generation wearing and tearing changes to some extent of the second friction material portion.
Yet among the known hydraulic drum braking mechanism 1 of this kind, the assembling meeting of first brake shoes 50 and second brake shoes 60 becomes quite difficult because of the existence of positioning device 80.
The model utility content
The purpose of this utility model is that a kind of hydraulic drum braking mechanism will be provided, and it can allow first brake shoes and second brake shoes to be assembled easily.
The purpose of this utility model is achieved in that the utility model comprises a wheel hub; One brake disc is sheathed among this wheel hub; One positioning seat is arranged on this brake disc; One oil cylinder is arranged on this brake disc, and has a grease chamber; One hollow piston is arranged among this grease chamber of this oil cylinder with move mode, and has an annular holding part; One piston is arranged among this grease chamber of this oil cylinder with move mode, and has a double-screw bolt, and wherein, this double-screw bolt is centered on by this hollow piston, and has a screw section; One reed is arranged among this annular holding part of this hollow piston in the mode of sliding, and is connected between this screw section of this annular holding part of this hollow piston and this double-screw bolt; One clasp is sheathed among this hollow piston, and is adjacent to this annular holding part, is to keep out this reed in order to the location; One first brake shoes has a first end and a second end, and wherein, this first end is with respect to this second end, and is connected to this hollow piston, and this second end is that mode with butt is connected in this positioning seat; One second brake shoes with respect to this first brake shoes, and has one the 3rd end and one the 4th end, wherein, the 3rd end is with respect to the 4th end, and is connected to this piston, and the 4th end is that mode with butt is connected in this positioning seat; And at least one extension spring, be connected between this first brake shoes and this second brake shoes.
Simultaneously, according to hydraulic drum braking mechanism of the present utility model, this hollow piston has more a locating slot, and this locating slot forms among this annular holding part, and this reed has a protuberance, and this protuberance is arranged among this locating slot with slide type.
In the utility model, more comprise one first oil sealing and one second oil sealing again, wherein, this first oil sealing is connected in this oil cylinder, and is sheathed on this hollow piston, and this second oil sealing is connected in this oil cylinder, and is sheathed on this piston.
The utility model has the advantages that, in the assembling process of first brake shoes of hydraulic drum braking mechanism and second brake shoes, only need two extension springs directly with after first brake shoes and second brake shoes are connected, utilizing tool that first brake shoes and second brake shoes are strutted positioning instant again can, simple to operate, convenient.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment cited below particularly also cooperates appended graphic elaborating.
Fig. 1 is a kind of part section and floor map of known hydraulic drum braking mechanism;
Fig. 2 A is the A-A generalized section of known hydraulic drum braking mechanism under a kind of operating state according to Fig. 1;
Fig. 2 B is the A-A generalized section of known hydraulic drum braking mechanism under another kind of operating state according to Fig. 1;
Fig. 2 C is the A-A generalized section of known hydraulic drum braking mechanism under another operating state according to Fig. 1;
Fig. 2 D is the A-A generalized section of known hydraulic drum braking mechanism under another operating state according to Fig. 1;
Fig. 3 A is that the utility model has the hydraulic drum braking mechanism that partly section and floor map are arranged under a kind of operating state;
Fig. 3 B is part section and the floor map of hydraulic drum braking mechanism of the present utility model under another kind of operating state;
Fig. 3 C is part section and the floor map of hydraulic drum braking mechanism of the present utility model under another operating state;
Fig. 4 is the B-B generalized section according to Fig. 3 A.
The primary component symbol description
1,100～hydraulic drum braking mechanism
10,110～wheel hub
15,115～brake disc
16,116～positioning seat
20,120～oil cylinder
21,121～grease chamber
31～first piston
32～the second pistons
41,191～the first oil sealings
42,192～the second oil sealings
50,170～the first brake shoes
51,171～first end
52,172～the second end
55,175～the first friction material portions
60,180～the second brake shoes
63,183～the 3rd ends
64,184～the 4th ends
65,185～the second friction material portions
66,81a～open-work
70,195～extension spring
80～positioning device
81～the first elements
81b～first tooth the portion
82～the second elements
82a～hook part
82b～pillar
83～the first springs
84～the second springs
82c～second tooth the portion
130～hollow piston
131～annular holding part
132～locating slot
140～piston
141～double-screw bolt
141a～screw section
150～reed
151～protuberance
160～clasp
Embodiment
Now cooperate graphic explanation preferred embodiment of the present utility model.
See also Fig. 3 A, Fig. 3 B and Fig. 3 C, the hydraulic drum braking mechanism 100 of present embodiment mainly includes a wheel hub 110, a brake disc 115, a positioning seat 116, an oil cylinder 120, a hollow piston 130, one first oil sealing 191, a piston 140, one second oil sealing 192, a reed 150, a clasp 160, one first brake shoes 170, one second brake shoes 180 and two extension springs 195.
Wheel hub 110 is arranged on the wheel (not shown), and wheel hub 110 can rotate synchronously with wheel.
Brake disc 115 is connected in a vehicle frame (not shown), and brake disc 115 is sheathed among the wheel hub 110.At this, the center of rotation of wheel hub 110 is to overlap with the center of brake disc 115.
Positioning seat 116 is arranged on the brake disc 115.
Oil cylinder 120 is arranged on the brake disc 115, and oil cylinder 120 has a grease chamber 121.At this, accommodate the brake-fluid (not shown) in the grease chamber 121.
As Fig. 3 A, Fig. 3 B, Fig. 3 C and shown in Figure 4, hollow piston 130 is arranged among the grease chamber 121 of oil cylinder 120 in the mode that moves, and hollow piston 130 has an annular holding part 131 and a locating slot 132.At this, locating slot 132 is to form among the annular holding part 131.In addition, shown in Fig. 3 A, Fig. 3 B and Fig. 3 C, first oil sealing 191 is connected in the inwall of oil cylinder 120, and first oil sealing 191 is sheathed on the hollow piston 130.At this, first oil sealing 191 is to be used for preventing that the brake-fluid in the grease chamber 121 from leaking to outside the oil cylinder 120.
Piston 140 also is to be arranged among the grease chamber 121 of oil cylinder 120 with move mode, and piston 140 has a double-screw bolt 141.At this, double-screw bolt 141 is centered on by hollow piston 130, and double-screw bolt 141 has a screw section 141a.In addition, second oil sealing 192 also is the inwall that is connected in oil cylinder 120, and second oil sealing 192 is sheathed on the piston 140.Similarly, second oil sealing 192 is to be used for preventing that the brake-fluid in the grease chamber 121 from leaking to outside the oil cylinder 120.
As Fig. 3 A, Fig. 3 B, Fig. 3 C and shown in Figure 4, reed 150 is to be arranged among the annular holding part 131 of hollow piston 130 in the mode that (axially) slides, and reed 150 is connected between the screw section 141a of the annular holding part 131 of hollow piston 130 and double-screw bolt 141.More detailed, because an end of reed 150 is connected to the screw section 141a of double-screw bolt 141, so screw section 141a can have folk prescription to the function of keeping out for reed 150.In addition, as shown in Figure 4, reed 150 has a protuberance 151, and protuberance 151 is to be arranged among the locating slot 132 of hollow piston 130 in the mode that (axially) slides.At this, owing to protuberance 151 is arranged among the locating slot 132, so reed 150 can rotate synchronously with hollow piston 130.
Clasp 160 is sheathed among the hollow piston 130, and clasp 160 is adjacent to annular holding part 131, and it can be used to the location and keeps out reed 150.More specifically, the existence of clasp 160 can avoid reed 150 to break away from from annular holding part 131, and can have an appropriate gap allow reed 150 slide between annular holding part 131 and clasp 160.In addition, among present embodiment, clasp 160 can be the form of a C type clasp.
Shown in Fig. 3 A, Fig. 3 B and Fig. 3 C, first brake shoes 170 has a first end 171, a second end 172 and one first friction material portion 175.First end 171 is with respect to the second end 172, and first end 171 is connected to hollow piston 130.The second end 172 is that the mode with butt is connected in positioning seat 116.The first friction material portion 175 takes shape on the outer rim of first brake shoes 170.
Second brake shoes 180 is with respect to first brake shoes 170, and second brake shoes 180 has one the 3rd end 183, one the 4th end 184 and one second friction material portion 185.The 3rd end 183 is with respect to the 4th end 184, and the 3rd end 183 is connected to piston 140.The 4th end 184 is that the mode with butt is connected in positioning seat 116.The second friction material portion 185 takes shape on the outer rim of second brake shoes 180.
Two extension springs 195 all are to be connected between first brake shoes 170 and second brake shoes 180, and it can make win brake shoes 170 and second brake shoes 180 keep drawing close in opposite directions.
When a hydraulic pressure that brake-fluid is set up by a general braking pump (not shown) and when being sent in the grease chamber 121 of oil cylinder 120, it will order about hollow piston 130 and piston 140 relative to away from moving, thereby to make win brake shoes 170 and second brake shoes 180 be that pivot point is strutted with positioning seat 116 respectively, and then the second friction material portion 185 that makes the first friction material portion 175 of the brake shoes 170 of winning and second brake shoes 180 contacts with wheel hub 110 respectively and produces braking force, shown in Fig. 3 B.At this, in the moving process of hollow piston 130, clasp 160 can towards an end of reed 150 against.Then, shown in Fig. 3 C, clasp 160 can force the other end of reed 150 to cross over the thread on the screw section 141a of double-screw bolt 141 and jump dental phenomenon, up to the second friction material portion 185 of the first friction material portion 175 of first brake shoes 170 and second brake shoes 180 can be respectively with till wheel hub 110 is done complete the contact.
When general braking pump is released and when this hydraulic pressure is disappeared, two extension springs 195 can force first brake shoes 170 and second brake shoes 180 to be drawn close in opposite directions, and then the second friction material portion 185 that can force the first friction material portion 175 of first brake shoes 170 and second brake shoes 180 separates with wheel hub 110 and can force hollow piston 130 and piston 140 to move in opposite directions, till an end of reed 150 is conflicted the bottom of annular holding part 131 of hollow piston 130.
As mentioned above, in the assembling process of first brake shoes 170 of hydraulic drum braking mechanism 100 and second brake shoes 180, only need two extension springs 195 directly with after first brake shoes 170 and second brake shoes 180 are connected, utilizing tool that first brake shoes 170 and second brake shoes 180 are strutted positioning instant again can.

Claims (3)

1. hydraulic drum braking mechanism is characterized in that comprising:
One wheel hub;
One brake disc is sheathed among this wheel hub;
One positioning seat is arranged on this brake disc;
One oil cylinder is arranged on this brake disc, and has a grease chamber;
One hollow piston is arranged among this grease chamber of this oil cylinder with move mode, and has an annular holding part;
One piston is arranged among this grease chamber of this oil cylinder with move mode, and has a double-screw bolt, and wherein, this double-screw bolt is centered on by this hollow piston, and has a screw section;
One reed is arranged among this annular holding part of this hollow piston with slide type, and is connected between this screw section of this annular holding part of this hollow piston and this double-screw bolt;
One clasp is sheathed among this hollow piston, and is adjacent to this annular holding part, keeps out this reed in order to the location;
One first brake shoes has a first end and a second end, and wherein, this first end is with respect to this second end, and is connected to this hollow piston, and this second end is that mode with butt is connected in this positioning seat;
One second brake shoes with respect to this first brake shoes, and has one the 3rd end and one the 4th end, wherein, the 3rd end is with respect to the 4th end, and is connected to this piston, and the 4th end is that mode with butt is connected in this positioning seat; And
At least one extension spring is connected between this first brake shoes and this second brake shoes.
2. hydraulic drum braking mechanism as claimed in claim 1, it is characterized in that this hollow piston has a locating slot, this locating slot forms among this annular holding part, and this reed has a protuberance, and this protuberance is to be arranged among this locating slot with slide type.
3. hydraulic drum braking mechanism as claimed in claim 1 is characterized in that comprising one first oil sealing and one second oil sealing, wherein, this first oil sealing is connected in this oil cylinder, and be sheathed on this hollow piston, and this second oil sealing is connected in this oil cylinder, and is sheathed on this piston.
CN201020194291XU 2010-05-11 2010-05-11 Hydraulic drum brake mechanism Expired - Fee Related CN201714872U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020194291XU CN201714872U (en) 2010-05-11 2010-05-11 Hydraulic drum brake mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020194291XU CN201714872U (en) 2010-05-11 2010-05-11 Hydraulic drum brake mechanism

Publications (1)

Publication Number Publication Date
CN201714872U true CN201714872U (en) 2011-01-19

Family

ID=43460869

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201020194291XU Expired - Fee Related CN201714872U (en) 2010-05-11 2010-05-11 Hydraulic drum brake mechanism

Country Status (1)

Country Link
CN (1) CN201714872U (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110119

Termination date: 20150511

EXPY Termination of patent right or utility model