CN209990824U - Agricultural vehicle parking brake with abrasion detection mechanism - Google Patents
Agricultural vehicle parking brake with abrasion detection mechanism Download PDFInfo
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- CN209990824U CN209990824U CN201920808925.7U CN201920808925U CN209990824U CN 209990824 U CN209990824 U CN 209990824U CN 201920808925 U CN201920808925 U CN 201920808925U CN 209990824 U CN209990824 U CN 209990824U
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- brake
- parking brake
- parking
- detection mechanism
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Abstract
The utility model relates to an agricultural vehicle parking brake with abrasion detection mechanism, which comprises a brake bottom plate, a brake drum, a brake shoe, an anchoring frame, a brake wheel cylinder, a parking active lever, a parking brake pull rod, a parking brake push rod and a brake detection mechanism, wherein the brake drum is internally provided with two symmetrically arranged brake shoes, and the bottom of the brake shoe is connected with the anchoring frame; a brake wheel cylinder is arranged between the upper ends of the two brake shoes, and two piston rods of the brake wheel cylinder are respectively connected with the upper ends of the two brake shoes; the brake detection mechanism comprises two wear amplification mechanisms and a switch which are symmetrically arranged, and each wear amplification mechanism comprises a detection lever, a sliding rod, a sliding frame, a spring, a fixed spring seat, a movable spring seat and a guide seat; the utility model discloses a braking detection mechanism detects brake shoe wearing and tearing, sends the police dispatch newspaper through the siren and in time maintains the stopper, and guarantee driving safety is worth wideling popularize.
Description
Technical Field
The utility model belongs to the technical field of the automotive brake, concretely relates to agricultural vehicle parking brake with wearing and tearing detection mechanism.
Background
The agricultural vehicle is a general name for the cargo vehicle suitable for agricultural transportation. Including vehicles designed specifically for agricultural transportation and various special vehicles for converting common trucks for agricultural transportation. Agricultural vehicles are generally heavier in weight and load than cars, and therefore require higher brakes than cars.
The automobile brake is a braking device of an automobile, and the brakes used by the automobile are almost all of friction type and can be divided into drum type and disc type. The rotary element in the drum brake friction pair is a brake drum, and the working surface of the rotary element is a cylindrical surface; the rotating element of the disc brake is then a rotating brake disc, with the end face being the working surface.
Agricultural automobile generally uses drum brake, and drum brake's parking brake and service brake are integrated in the brake drum, and the brake shoe plays service brake and parking brake two effects, and the brake shoe of the stopper among the prior art uses and can appear wearing and tearing after a period of time and exceed the upper limit, can not reach the safety standard of braking this moment, but need daily maintenance just can discover the problem that the wearing and tearing are transfinited, has certain driving danger a period of time before overhauing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a whether agricultural vehicle parking brake with wearing and tearing detection mechanism that can detect brake shoe wearing and tearing transfinite just for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a parking brake with a wear detection mechanism for an agricultural vehicle comprises a brake bottom plate, a brake drum, brake shoes, an anchoring frame, a brake wheel cylinder, a parking active lever, a parking brake pull rod, a parking brake push rod and a brake detection mechanism, wherein two brake shoes which are symmetrically arranged are arranged inside the brake drum, the bottom of each brake shoe is connected with the anchoring frame, the anchoring frame is fixedly arranged on the brake bottom plate, the bottom of each brake shoe is provided with a fixing hole, the anchoring frame is provided with a fixing hole matched with the fixing hole, and the fixing hole in each brake shoe is connected with the fixing hole in the anchoring frame through a pin shaft;
a brake wheel cylinder is arranged between the upper ends of the two brake shoes, two piston rods of the brake wheel cylinder are respectively connected with the upper ends of the two brake shoes, and a cylinder body of the brake wheel cylinder is fixedly connected with a brake bottom plate; and a piston rod of the brake wheel cylinder pushes the upper end of the brake shoe to move outwards, and the brake shoe rotates around the lower end and moves outwards to be in contact with the brake drum to perform service braking.
The brake detection mechanism comprises two wear amplification mechanisms and a switch which are symmetrically arranged, each wear amplification mechanism comprises a detection lever, a sliding rod, a sliding frame, a spring, a fixed spring seat, a movable spring seat and a guide seat, the upper end of the detection lever is connected with the upper part of the brake shoe through a pin shaft, the upper part of the detection lever is connected with a brake bottom plate through a fulcrum rotating shaft, and the lower end of the detection lever is provided with a sliding pin shaft which is arranged in the sliding frame; the sliding frame is fixedly connected with the end part of the sliding rod, the sliding frame is vertically arranged, a strip-shaped hole in clearance fit with the sliding pin shaft is arranged on the sliding frame, and the strip-shaped hole is vertically arranged; the sliding rod is connected with the brake bottom plate through the guide seat, the sliding rod penetrates through the guide seat, and a through hole in clearance fit with the sliding rod is formed in the guide seat;
the sliding rod is sleeved with a fixed spring seat and a movable spring seat, the fixed spring seat is fixedly connected with the sliding rod, the sliding rod between the fixed spring seat and the movable spring seat is sleeved with a spring, one end of the spring is fixedly connected with the fixed spring seat, the other end of the spring is fixedly connected with the movable spring seat, and the movable spring seat is provided with a through hole in clearance fit with the sliding rod; the left end of the sliding rod of the right abrasion amplification mechanism is provided with a switch. When the brake is braked, the upper ends of the two brake shoes move towards two sides, the moving distance is amplified by the detection lever to be reflected to the moving distance of the sliding rod, and specifically, the brake shoes drive the upper ends of the detection lever to rotate around the fulcrum rotating shaft, so that the sliding pin shafts are driven to slide in the sliding frames, the sliding pin shafts push the sliding frames to move towards the middle, and the sliding rod is pushed to move towards the middle; when the abrasion of the brake shoe is not over-limit, the distance between the sliding rod and the switch is larger than the moving distance, the switch cannot be triggered during braking, the moving distance of the sliding rod is increased along with the increase of the abrasion of the brake shoe until the abrasion is over-limit, and the sliding rod triggers the switch to give an alarm.
The upper end of the parking brake lever is connected with the upper part of the right brake shoe through a pin shaft, the parking brake lever is positioned on the front side of the brake shoe, the lower end of the parking brake lever is connected with the parking brake pull rod, the upper part of the parking brake lever is connected with the right end of the parking brake push rod, and the left end of the parking brake push rod is connected with the left brake shoe. The lower end of the parking brake lever is pulled by the pull rod to move towards the left side, the parking brake lever rotates around the pin shaft at the upper part, the push rod is driven to push the brake shoe at the left side to move towards the outside, the brake shoe at the right side is pushed to move towards the outside through reaction force, and a friction plate on the brake shoe is in contact with the brake drum to perform parking brake.
As the utility model discloses a further optimization scheme, detect the position that the lever connection brake shoe is close to the brake wheel cylinder.
As a further optimization scheme of the utility model, the both ends of round pin axle are equipped with the spacing ring. The diameter of the limiting ring is larger than the width of the strip-shaped hole, and the pin shaft is limited to be separated from the sliding frame.
As the utility model discloses a further optimization scheme, the spring is located to fixed spring holder and the one end of keeping away from the brake shoe.
As a further optimization scheme of the utility model, the slide frame is located the slide bar and is close to the one end of brake shoe.
As a further optimization scheme of the utility model, the brake cylinder is connected the brake master cylinder.
The beneficial effects of the utility model reside in that:
1) the utility model detects whether the abrasion of the brake shoe exceeds the limit through the brake detection mechanism, sends out an alarm through the alarm to maintain the brake in time, ensures the driving safety and reminds the staff to maintain the brake;
2) the utility model discloses a brake shoe wearing and tearing volume is enlargied through lever principle to the wearing and tearing mechanism of enlargiing, improves and detects the precision.
Drawings
Fig. 1 is a schematic structural diagram of the present invention in the first embodiment;
fig. 2 is a schematic structural view of a wear magnifying mechanism on the left side of the present invention according to the first embodiment;
fig. 3 is a schematic structural view of a right-side wear magnifying mechanism according to the first embodiment of the present invention.
In the figure: the brake device comprises a brake bottom plate 1, a brake drum 2, a brake shoe 3, an anchoring frame 4, a brake wheel cylinder 5, a parking active lever 6, a parking brake pull rod 7, a parking brake push rod 8, a brake detection mechanism 9, a wear amplification mechanism 10, a switch 11, a detection lever 12, a sliding rod 13, a sliding frame 14, a spring 15, a fixed spring seat 16, a movable spring seat 17 and a guide seat 18.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.
Example one
As shown in fig. 1-3, an agricultural vehicle parking brake with a wear detection mechanism comprises a brake bottom plate 1, a brake drum 2, brake shoes 3, an anchoring frame 4, a brake wheel cylinder 5, a parking active lever 6, a parking brake pull rod 7, a parking brake push rod 8 and a brake detection mechanism 9, wherein two symmetrically arranged brake shoes 3 are arranged inside the brake drum 2, the bottom of each brake shoe 3 is connected with the anchoring frame 4, the anchoring frame 4 is fixedly arranged on the brake bottom plate 1, the bottom of each brake shoe 3 is provided with a fixing hole, the anchoring frame 4 is provided with a fixing hole matched with the fixing hole, and the fixing hole on each brake shoe 3 is connected with the fixing hole on the anchoring frame 4 through a pin shaft;
a brake wheel cylinder 5 is arranged between the upper ends of the two brake shoes 3, two piston rods of the brake wheel cylinder 5 are respectively connected with the upper ends of the two brake shoes 3, and a cylinder body of the brake wheel cylinder 5 is fixedly connected with the brake bottom plate 1; the piston rod of the brake wheel cylinder 5 pushes the upper end of the brake shoe 3 to move outwards, and the brake shoe 3 rotates around the lower end and moves outwards to contact with the brake drum 2 to perform service braking.
The brake detection mechanism 9 comprises two wear amplification mechanisms 10 and a switch 11 which are symmetrically arranged, the wear amplification mechanisms 10 comprise detection levers 12, sliding rods 13, sliding frames 14, springs 15, fixed spring seats 16, movable spring seats 17 and guide seats 18, the upper ends of the detection levers 12 are connected with the upper parts of the brake shoes 3 through pin shafts, the upper parts of the detection levers 12 are connected with the brake bottom plate 1 through fulcrum rotating shafts, and the lower ends of the detection levers 12 are provided with sliding pin shafts which are arranged in the sliding frames 14; the sliding frame 14 is fixedly connected with the end part of the sliding rod 13, the sliding frame 14 is vertically arranged, the sliding frame 14 is provided with a strip-shaped hole in clearance fit with the sliding pin shaft, and the strip-shaped hole is vertically arranged; the sliding rod 13 is connected with the brake bottom plate 1 through a guide seat 18, the sliding rod 13 penetrates through the guide seat 18, and a through hole in clearance fit with the sliding rod 13 is formed in the guide seat 18;
a fixed spring seat 16 and a movable spring seat 17 are sleeved on the sliding rod 13, the fixed spring seat 16 is fixedly connected with the sliding rod 13, a spring 15 is sleeved on the sliding rod 13 between the fixed spring seat 16 and the movable spring seat 17, one end of the spring 15 is fixedly connected with the fixed spring seat 16, the other end of the spring 15 is fixedly connected with the movable spring seat 17, and a through hole in clearance fit with the sliding rod 13 is formed in the movable spring seat 17; the switch 11 is provided at the left end of the slide bar 13 of the right wear amplification mechanism 10. When the brake is braked, the upper ends of the two brake shoes 3 move towards two sides, the moving distance is amplified by the detection lever 12 to be the moving distance of the sliding rod 13, specifically, the brake shoes 3 drive the upper ends of the detection lever 12 to rotate around a fulcrum rotating shaft, so that the sliding pin shaft is driven to slide in the sliding frame 14, the sliding pin shaft pushes the sliding frame 14 to move towards the middle, and the sliding rod 13 is pushed to move towards the middle; when the abrasion of the brake shoe 3 is not over-limit, the distance between the sliding rod 13 and the switch 11 is larger than the moving distance, the switch 11 is not triggered during braking, the moving distance of the sliding rod 13 is increased along with the increase of the abrasion of the brake shoe 3 until the abrasion is over-limit, and the sliding rod 13 triggers the switch 11 to give an alarm.
The upper end of a parking brake lever is connected with the upper part of the right brake shoe 3 through a pin shaft, the parking brake lever is positioned on the front side of the brake shoe 3, the lower end of the parking brake lever is connected with a parking brake pull rod 7, the upper part of the parking brake lever is connected with the right end of a parking brake push rod 8, and the left end of the parking brake push rod 8 is connected with the left brake shoe 3. The lower end of the parking brake lever is pulled by the pull rod to move towards the left side, the parking brake lever rotates around the pin shaft at the upper part, the push rod is driven to push the brake shoe 3 at the left side to move towards the outside, the brake shoe 3 at the right side is pushed to move towards the outside through reaction force, and a friction plate on the brake shoe 3 is in contact with the brake drum 2 to perform parking brake.
Further, the detection lever 12 is connected to a portion of the brake shoe 3 near the wheel cylinder 5.
Furthermore, two ends of the pin shaft are provided with limit rings. The diameter of the limiting ring is larger than the width of the strip-shaped hole, so that the pin shaft is limited to be separated from the sliding frame 14.
Further, a fixed spring seat 16 is provided at an end of the spring 15 remote from the brake shoe 3.
Further, a slide frame 14 is provided at one end of the slide rod 13 near the brake shoe 3.
Further, the brake wheel cylinder 5 is connected to a master cylinder. The input hydraulic energy of the brake master cylinder is converted into mechanical energy.
Further, the parking brake pull rod 7 is connected with a hand brake. The specific connection structure is the prior art and is not described herein.
Further, a friction plate is provided on the outer side of the brake shoe 3.
Further, the switch 11 is a contact switch 11. Other switches 11 that can be activated by contact may also be used. The switch 11 is connected to an alarm, and when the switch 11 is triggered, the alarm can be turned on to give an alarm, and the necessary alarm is connected to a power supply through the switch 11.
The utility model discloses a structural feature and theory of operation: the utility model drives the parking brake lever to swing through the parking brake pull rod 7, pushes the parking brake push rod 8 to make the left brake shoe 3 expand outwards for parking brake, and drives the right brake shoe 3 to expand outwards for brake through the reaction force; the service brake is realized by pushing the brake shoe 3 to expand through the brake wheel cylinder 5.
The utility model discloses a 3 wearing and tearing of brake shoe are detected to braking detection mechanism 9, send out the police dispatch newspaper through the siren and in time maintain the stopper, guarantee driving safety.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. The utility model provides an agricultural vehicle parking brake with wearing and tearing detection mechanism which characterized in that: the parking brake comprises a brake bottom plate, a brake drum, brake shoes, an anchoring frame, a brake wheel cylinder, a parking active lever, a parking brake pull rod, a parking brake push rod and a brake detection mechanism, wherein two symmetrically arranged brake shoes are arranged inside the brake drum;
a brake wheel cylinder is arranged between the upper ends of the two brake shoes, two piston rods of the brake wheel cylinder are respectively connected with the upper ends of the two brake shoes, and a cylinder body of the brake wheel cylinder is fixedly connected with a brake bottom plate;
the brake detection mechanism comprises two wear amplification mechanisms and a switch which are symmetrically arranged, each wear amplification mechanism comprises a detection lever, a sliding rod, a sliding frame, a spring, a fixed spring seat, a movable spring seat and a guide seat, the upper end of the detection lever is connected with the upper part of the brake shoe through a pin shaft, the upper part of the detection lever is connected with a brake bottom plate through a fulcrum rotating shaft, and the lower end of the detection lever is provided with a sliding pin shaft which is arranged in the sliding frame; the sliding frame is fixedly connected with the end part of the sliding rod, the sliding frame is vertically arranged, a strip-shaped hole in clearance fit with the sliding pin shaft is arranged on the sliding frame, and the strip-shaped hole is vertically arranged; the sliding rod is connected with the brake bottom plate through the guide seat, the sliding rod penetrates through the guide seat, and a through hole in clearance fit with the sliding rod is formed in the guide seat;
the sliding rod is sleeved with a fixed spring seat and a movable spring seat, the fixed spring seat is fixedly connected with the sliding rod, the sliding rod between the fixed spring seat and the movable spring seat is sleeved with a spring, one end of the spring is fixedly connected with the fixed spring seat, the other end of the spring is fixedly connected with the movable spring seat, and the movable spring seat is provided with a through hole in clearance fit with the sliding rod; the left end of a sliding rod of the right abrasion amplification mechanism is provided with a switch;
the upper end of the parking brake lever is connected with the upper part of the right brake shoe through a pin shaft, the parking brake lever is positioned on the front side of the brake shoe, the lower end of the parking brake lever is connected with the parking brake pull rod, the upper part of the parking brake lever is connected with the right end of the parking brake push rod, and the left end of the parking brake push rod is connected with the left brake shoe.
2. The parking brake with wear detection mechanism for agricultural vehicle of claim 1, characterized in that: the detection lever is connected with the part of the brake shoe close to the brake wheel cylinder.
3. The parking brake with wear detection mechanism for agricultural vehicle of claim 1, characterized in that: and two ends of the pin shaft are provided with limiting rings.
4. The parking brake with wear detection mechanism for agricultural vehicle of claim 1, characterized in that: the fixed spring seat is arranged at one end, far away from the brake shoe, of the spring.
5. The parking brake with wear detection mechanism for agricultural vehicle of claim 1, characterized in that: the sliding frame is arranged at one end of the sliding rod close to the brake shoe.
6. The parking brake with wear detection mechanism for agricultural vehicle of claim 1, characterized in that: the brake wheel cylinder is connected with a brake master cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920808925.7U CN209990824U (en) | 2019-05-31 | 2019-05-31 | Agricultural vehicle parking brake with abrasion detection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920808925.7U CN209990824U (en) | 2019-05-31 | 2019-05-31 | Agricultural vehicle parking brake with abrasion detection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990824U true CN209990824U (en) | 2020-01-24 |
Family
ID=69295812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920808925.7U Expired - Fee Related CN209990824U (en) | 2019-05-31 | 2019-05-31 | Agricultural vehicle parking brake with abrasion detection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209990824U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765188A (en) * | 2020-06-30 | 2020-10-13 | 东风商用车有限公司 | Single-contact limit type wear sensor for friction plate of drum brake |
| CN111911570A (en) * | 2020-07-09 | 2020-11-10 | 东风商用车有限公司 | Continuous sensor for detecting friction plate of drum brake and drum brake |
-
2019
- 2019-05-31 CN CN201920808925.7U patent/CN209990824U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765188A (en) * | 2020-06-30 | 2020-10-13 | 东风商用车有限公司 | Single-contact limit type wear sensor for friction plate of drum brake |
| CN111765188B (en) * | 2020-06-30 | 2021-09-10 | 东风商用车有限公司 | Single-contact limit type wear sensor for friction plate of drum brake |
| CN111911570A (en) * | 2020-07-09 | 2020-11-10 | 东风商用车有限公司 | Continuous sensor for detecting friction plate of drum brake and drum brake |
| CN111911570B (en) * | 2020-07-09 | 2021-05-11 | 东风商用车有限公司 | Continuous sensor for detecting friction plate of drum brake and drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 |