Parking braking structure capable of keeping braking clearances on two sides of parking calipers and engineering vehicle

Abstract

The utility model discloses a parking braking structure and an engineering vehicle for keeping braking clearance on both sides of parking calipers, a sliding pin penetrates through the side part of a calipers body, one end of the sliding pin in the length direction is a connecting end and is used for being fixed with a mounting rack, the sliding pin is in clearance fit with the calipers body, and the sliding pin is fixed with the mounting rack. The caliper body can axially and linearly move along the sliding pin; the other end of the sliding pin in the length direction is a limiting end, and the elastic component is installed on the sliding pin located between the limiting end and the caliper body. The adjusting bolt penetrates through the top of the caliper body and is located above the friction plate, one end of the adjusting bolt in the length direction abuts against the mounting frame, the adjusting bolt is in threaded connection with the caliper body, the adjusting bolt is rotated, and under the threaded transmission effect, the caliper body axially and linearly moves on the sliding pin; and a gap between the friction plate on the other side and the brake disc is further adjusted. According to the utility model, the possibility of brake drag friction and abnormal sound is avoided, and the service life of the friction plate is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of parking brake structure for keeping parking caliper double-side brake clearance, belong to parking brake technical field. BACKGROUND

[0002] Wheel excavator needs to have parking brake function, to ensure that the whole machine can still be emergency braking under the condition that travel brake is completely ineffective.

[0003] As Figure 1 、 Figure 2 Indicated, the parking hydraulic caliper clearance matched by current wheel excavator can only be kept on one side of brake disc, and is artificially randomly distributed on both sides of brake disc by sliding pin shaft. Due to the influence of factors such as whole machine vibration or installation precision, brake clearance is often kept on one side of brake disc. It is easy to cause brake drag or abnormal noise. Not only affect the service life of friction plate, but more importantly, affect the braking safety of whole machine.

[0004] The existing patent CN207814282U does not describe the automatic clearance adjustment method of brake caliper, and the original scheme only improves the sealing and wear resistance of brake piston.

[0005] The existing patent CN206159331U sets brake clearance by torsional spring, and moves single-sided brake pad by the combination of screw rod, spring bearing plate. This patent has two problems.

[0006] 1. Without the participation of brake clearance detection device, it is impossible to perform adjustment at any time.

[0007] 2. It can only realize single-sided brake clearance adjustment.

[0008] The existing patent CN117366136A can realize bidirectional adjustment of elevator caliper, but when friction plate is worn, it is impossible to adjust brake clearance to initial clearance, which has safety hazard. SUMMARY

[0009] In view of the deficiencies in the prior art, the utility model provides a kind of parking brake structure for keeping parking caliper double-side brake clearance, avoid the possibility of brake drag and abnormal noise, prolong the service life of friction plate, improve the braking safety of whole machine.

[0010] The utility model is realized according to the following technical scheme:

[0011] Firstly, the utility model provides a kind of parking brake structure for keeping parking caliper double-side brake clearance, including mounting bracket, caliper body, parking brake piston, adjusting nut, brake disc and friction plate, and the clearance between one side friction plate and brake disc is adjusted by adjusting nut;Further comprising:

[0012] A sliding pin passes through the side of the caliper body. One end of the sliding pin along its length is a connecting end for fixing it to the mounting bracket. The sliding pin and the caliper body are in clearance fit, allowing the caliper body to move axially linearly along the sliding pin.

[0013] The elastic component has a limiting end at the other end of the sliding pin along its length, and the elastic component is installed on the sliding pin located between the limiting end and the caliper body;

[0014] An adjusting bolt passes through the top of the caliper body and is located above the friction plate. One end of the adjusting bolt along its length abuts against the mounting bracket. The adjusting bolt is threadedly connected to the caliper body. Rotating the adjusting bolt causes the caliper body to move axially in a straight line on the sliding pin under the action of the thread, thereby adjusting the gap between the friction plate and the brake disc on the other side.

[0015] In some embodiments, the connecting end of the sliding pin is a threaded end, which is screwed into the threaded hole of the mounting bracket.

[0016] In some embodiments, the connecting end of the sliding pin is provided with a mounting nut, and the sliding pin is locked onto the mounting bracket by tightening the mounting nut.

[0017] In some embodiments, the limiting end of the sliding pin is a flange structure; or, the limiting end of the sliding pin is a flange structure, and a gasket is fitted on the sliding pin with the flange structure to increase the length in the radial direction.

[0018] In some embodiments, the adjusting bolt between the mounting bracket and the caliper body is provided with a locking nut, and the adjusting bolt is fixed by tightening the locking nut.

[0019] In some embodiments, the caliper body has a boss fixed at a position facing the adjusting bolt, and the end of the adjusting bolt abuts against the boss.

[0020] In some embodiments, the elastic component is a spring, which is fitted onto the sliding pin, with one end of the spring abutting against the limiting end of the sliding pin and the other end of the spring abutting against the caliper body.

[0021] In some embodiments, the number of sliding pins is two, symmetrically arranged on two sides of the caliper body; and / or, the number of adjusting bolts is one, arranged at the top center of the caliper body.

[0022] Secondly, this utility model provides an engineering vehicle, including the above-mentioned parking brake structure for maintaining the braking gap on both sides of the parking caliper.

[0023] In some embodiments, the engineering vehicle includes a wheeled excavator.

[0024] The beneficial effects of this utility model are:

[0025] This utility model provides a parking brake structure that maintains the braking clearance on both sides of the parking caliper. The braking clearance is precisely maintained on both sides of the brake disc, and the friction pads can still be adjusted to the initial design clearance after wear, avoiding the possibility of brake drag and abnormal noise, extending the service life of the friction pads, and improving the overall braking safety. Attached Figure Description

[0026] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0027] In the attached diagram:

[0028] Figure 1 Schematic diagram of existing parking brake structure Figure 1 ;

[0029] Figure 2 Schematic diagram of existing parking brake structure Figure 2 ;

[0030] The attached diagram is labeled as follows: 1. Mounting nut, 2. Mounting bracket, 3. Sliding pin, 4. Locking nut, 5. Brake disc, 6. Caliper body, 7. Friction pad, 8. Adjusting bolt, 9. Brake piston, 10. Adjusting nut.

[0031] Figure 3 This is a top view of the parking brake structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the caliper body of this utility model;

[0033] Figure 5 This is a schematic diagram of the sliding pin structure of this utility model;

[0034] Figure 6 This utility model provides a three-dimensional parking brake structure. Figure 1 ;

[0035] Figure 7 This utility model provides a three-dimensional parking brake structure. Figure 2 .

[0036] The attached diagram is labeled as follows: 1. Mounting nut, 2. Mounting bracket, 3. Sliding pin, 4. Locking nut, 5. Brake disc, 6. Caliper body, 7. Friction pad, 8. Adjusting bolt, 9. Brake piston, 10. Adjusting nut, 11. Elastic component.

[0037] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] like Figure 1 , Figure 2 As shown, the existing parking brake caliper structure is as follows: including mounting nut 1, mounting bracket 2, sliding pin 3, locking nut 4, brake disc 5, caliper body 6, friction pad 7, adjusting bolt 8, brake piston 9, and adjusting nut 10.

[0042] The caliper body 6 is mounted on the mounting bracket 2 via two sliding pins 3, and secured to the back by two mounting nuts 1. Two friction plates 7 are mounted on the caliper body 6, and an adjusting bolt 8 is mounted on the caliper body 6 and secured with a locking nut 4 to prevent the friction plates 7 from dislodging under the action of the brake disc 5.

[0043] When the parking brake is applied, the parking brake piston 9 pushes the right friction pad 7 to press against the brake disc 5. Under the reaction force, the caliper body 6 moves to the right along the sliding pin 3, and the left friction pad 7 also presses against the brake disc, and the brake takes effect.

[0044] Upon initial installation or after wear of the friction pad 7, the brake clearance (the clearance between the friction pad 7 and one side of the brake disc 5) needs to be adjusted. This can be achieved by rotating the adjusting nut 10 to increase or decrease the brake clearance. Generally, the total brake clearance on both sides of the brake disc is 1.5-2 mm. In existing technology, after applying the adjusting nut 10, the brake clearance is usually not evenly distributed on both sides of the brake disc 5. It is necessary to intentionally push the caliper body 6 to move slightly on the sliding pin 3 to ensure a more even distribution of the brake clearance on both sides of the brake disc 5.

[0045] Due to factors such as machine vibration or insufficient installation precision, the brake clearance often remains on one side of the brake disc. This can easily cause brake drag or abnormal noise. This not only affects the service life of the friction pads, but more importantly, it impacts the overall braking safety of the machine.

[0046] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, this utility model provides a parking brake structure that maintains the braking clearance on both sides of a parking caliper, including a mounting bracket 2, a caliper body 6, a parking brake piston 9, an adjusting nut 10, a brake disc 5, and friction pads 7. The gap between one side of the friction pad 7 and the brake disc 5 is adjusted by the adjusting nut 10. It also includes a sliding pin 3, an elastic component 11, and an adjusting bolt 8. The sliding pin 3 passes through the side of the caliper body 6, with one end of its length serving as a connecting end for fixing it to the mounting bracket 2. The sliding pin 3 and the caliper body 6 are in clearance fit, allowing the caliper body to maintain the braking clearance on both sides. The caliper body 6 can move axially linearly along the sliding pin 3; the other end of the sliding pin 3 is a limiting end, and the elastic component 11 is installed on the sliding pin 3 located between the limiting end and the caliper body 6; the adjusting bolt 8 passes through the top of the caliper body 6 and is located above the friction plate 7. One end of the adjusting bolt 8 abuts against the mounting bracket 2 in the length direction. The adjusting bolt 8 is threadedly connected to the caliper body 6. By rotating the adjusting bolt 8, the caliper body 6 moves axially linearly on the sliding pin 3 under the action of the thread transmission, thereby adjusting the gap between the friction plate 7 on the other side and the brake disc 5.

[0047] It should be noted that the adjusting bolt 8 has two functions: firstly, to prevent the friction plate 7 from coming off, and secondly, to adjust the brake clearance.

[0048] The following provides a further explanation of the specific structure of the aforementioned sliding pin.

[0049] like Figure 5 As shown, the connecting end of the sliding pin 3 is a threaded end, which is screwed into the threaded hole of the mounting bracket 2. The limiting end of the sliding pin 3 is a flange structure; or, the limiting end of the sliding pin 3 is a flange structure, and a washer is fitted on the sliding pin 3 with the flange structure to increase the length in the radial direction.

[0050] Further options, such asFigure 3 , Figure 6 , Figure 7 As shown, the connecting end of the sliding pin 3 is provided with a mounting nut 1, and the sliding pin 3 is locked onto the mounting bracket 2 by tightening the mounting nut 1.

[0051] Further options, such as Figure 3 , Figure 6 , Figure 7 As shown, the adjusting bolt 8 between the mounting bracket 2 and the caliper body 6 is equipped with a locking nut 4, and the adjusting bolt 8 is fixed by tightening the locking nut 4.

[0052] Further options, such as Figure 3 , Figure 6 , Figure 7 As shown, the mounting plate 2 has a boss fixed at a position facing the adjusting bolt 8, and the end of the adjusting bolt 8 abuts against the boss.

[0053] In a preferred embodiment, a groove can be provided on the front end face of the boss, and the end of the adjusting bolt 8 can be inserted into the groove.

[0054] Further options, such as Figure 3 , Figure 6 , Figure 7 As shown, the elastic component 11 is a spring, which is fitted onto the sliding pin 3. One end of the spring abuts against the limiting end of the sliding pin 3, and the other end of the spring abuts against the caliper body 6.

[0055] Further options, such as Figure 3 , Figure 6 , Figure 7 As shown, there are two sliding pins 3, symmetrically arranged on the two sides of the caliper body 6; there is one adjusting bolt 8, located at the top center of the caliper body 6.

[0056] like Figure 3 Figure 6 Figure 7 Figure 3 As shown, the installation control dimensions for each of the above components are given below:

[0057] L1-(L2+L3)=(1.5-2)XΔ;

[0058] L1: The distance from the brake caliper mounting surface to the left side of the brake disc;

[0059] L2: Thickness of the mounting nut;

[0060] L3: Dimension from the left side of the caliper body to the left friction plate;

[0061] Δ: Braking clearance on one side.

[0062] L5≧L4+Δ;

[0063] L4: Thickness of the mounting nut;

[0064] L5: Thickness of the friction material in the friction pad.

[0065] The working process of the above parking brake structure is described below:

[0066] Brake caliper installation:

[0067] The elastic component 11 is fitted onto the head of the sliding pin 3, which passes through the caliper body 6. The locking nut 1 is first installed on the thread at the tail of the sliding pin 3. The above-mentioned mounting assembly is then installed on the mounting bracket 2. The sliding pin 3 is tightened to the specified preload torque, and the mounting nut 1 is tightened in the opposite direction. The adjusting bolt 8 is then screwed into the caliper body 6, and the locking nut 4 is tightened onto the adjusting bolt 8.

[0068] Brake clearance adjustment:

[0069] First, loosen the locking nut 4; rotate the adjusting nut 10 clockwise to make the brake clearance 0; then rotate the adjusting nut 10 counterclockwise to make the total brake clearance meet the design value; adjust the adjusting bolt 8, and when the tail of the adjusting bolt 8 hits the boss of the mounting bracket 2, the caliper body 6 moves to the right under the reaction force, and the clearance is evenly maintained on both sides of the brake disc.

[0070] As shown above, by designing the elastic component and mounting it with the sliding pin, the caliper body can move left and right along the sliding pin. By designing the connection method between the caliper body and the adjusting bolt, the caliper body can be controllably held at any position on the sliding pin under the reaction force of the adjusting bolt. This ensures precise distribution and stable maintenance of the brake clearance, avoiding the possibility of brake drag and abnormal noise. It also extends the service life of the friction pads and improves the overall braking safety.

[0071] The engineering vehicle provided by this utility model is described below. The engineering vehicle described below can be referred to in correspondence with the parking brake structure described above.

[0072] The engineering vehicle provided by this utility model may include a parking brake structure as described in any of the above embodiments.

[0073] The beneficial effects achieved by the engineering vehicle provided by this utility model are consistent with the beneficial effects achieved by the parking brake structure provided by this utility model, so they will not be repeated here.

[0074] It should be noted that the aforementioned engineering vehicles can be wheeled excavators.

[0075] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0076] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0077] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A parking brake structure for maintaining the braking clearance on both sides of a parking caliper, comprising a mounting bracket, a caliper body, a parking brake piston, an adjusting nut, a brake disc, and friction pads, wherein the gap between one side of the friction pad and the brake disc is adjusted by adjusting the adjusting nut; characterized in that, Also includes: A sliding pin passes through the side of the caliper body. One end of the sliding pin along its length is a connecting end for fixing it to the mounting bracket. The sliding pin and the caliper body are in clearance fit, allowing the caliper body to move axially linearly along the sliding pin. The elastic component has a limiting end at the other end of the sliding pin along its length, and the elastic component is installed on the sliding pin located between the limiting end and the caliper body; An adjusting bolt passes through the top of the caliper body and is located above the friction plate. One end of the adjusting bolt along its length abuts against the mounting bracket. The adjusting bolt is threadedly connected to the caliper body. Rotating the adjusting bolt causes the caliper body to move axially in a straight line on the sliding pin under the action of the thread, thereby adjusting the gap between the friction plate and the brake disc on the other side.

2. The parking brake structure according to claim 1, characterized in that: The connecting end of the sliding pin is a threaded end, which is screwed into the threaded hole of the mounting bracket.

3. The parking brake structure according to claim 2, characterized in that: The connecting end of the sliding pin is provided with a mounting nut, and the sliding pin is locked onto the mounting bracket by tightening the mounting nut.

4. The parking brake structure according to claim 1, characterized in that: The limiting end of the sliding pin is a flange structure; or, the limiting end of the sliding pin is a flange structure, and a gasket is fitted on the sliding pin with the flange structure to increase the length in the radial direction.

5. The parking brake structure according to claim 1, characterized in that: The adjusting bolt between the mounting bracket and the caliper body is equipped with a locking nut, which is tightened to fix the adjusting bolt.

6. The parking brake structure according to claim 1, characterized in that: The mounting bracket has a boss fixed at a position facing the adjusting bolt, and the end of the adjusting bolt abuts against the boss.

7. The parking brake structure according to claim 1, characterized in that: The elastic component is a spring, which is fitted onto the sliding pin. One end of the spring abuts against the limiting end of the sliding pin, and the other end of the spring abuts against the caliper body.

8. The parking brake structure according to claim 1, characterized in that: The number of sliding pins is two, symmetrically arranged on two sides of the caliper body; and / or, the number of adjusting bolts is one, arranged at the top center of the caliper body.

9. An engineering vehicle, characterized in that: The parking brake structure includes the parking brake structure that maintains the braking clearance on both sides of the parking caliper as described in any one of claims 1 to 8.

10. An engineering vehicle according to claim 9, characterized in that: The engineering vehicles include wheeled excavators.

Images