Device for preventing large-scale load-carrying vehicle from sliding on slope during parking

Abstract

The utility model discloses a device for preventing a large-scale load-carrying vehicle from sliding on a slope during parking. The device comprises a caliper body and a parking assembly, the parking assembly comprises a rotary driving device, a threaded rotating rod, a nut sleeve and a piston sleeve, and the threaded rotating rod is connected to the caliper body and is driven by the rotary driving device to rotate; a mounting cavity is formed in the caliper body; one end of the threaded rotating rod extends into and is connected with the nut sleeve; one end of the piston sleeve extends out of the mounting cavity and fixes an end plate, the outer side of the end plate is connected with a friction plate, and the inner side of the end plate abuts against the nut sleeve; an annular plate is arranged outside the nut sleeve, a compensation elastic piece is arranged between the annular plate and the end plate, and the two ends of the compensation elastic piece abut against the annular plate and the end plate respectively; according to the compensation elastic piece, parking force loss can be compensated when a part is cooled and contracted, and parking safety and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parking mechanism device technical field, concretely relates to a large -scale heavy -duty vehicle parking anti -sloping device. BACKGROUND

[0002] In the transportation process of large -scale heavy -duty vehicle, especially when driving in mountainous area or experiencing long downhill section, due to long time brake operation, brake part can produce a large amount of heat, and the part of parking mechanism linear expansion occurs. This thermal expansion phenomenon is particularly significant when parking in high temperature, and when the vehicle stops driving, with the gradual cooling of each part to normal temperature, the part that expands previously due to high temperature will contract. The size change caused by thermal expansion and contraction often leads to the reduction of parking effect, especially in large -scale heavy -duty vehicle due to its own heavy weight, more prone to hill rolling phenomenon when parking, thereby seriously threatening the traffic safety.

[0003] The existing large -scale heavy -duty vehicle parking system usually relies on single mechanical structure to realize parking function, and lacks effective compensation mechanism for the change of parking force caused by thermal expansion and contraction. Therefore, after parking in high temperature environment, with the decrease of temperature, the parking system can be insufficient due to the contraction of parts, and then increase the risk of hill rolling. UTILITY MODEL CONTENTS

[0004] The utility model aims at the problems existing in prior art, provides a large -scale heavy -duty vehicle parking anti -sloping device, and through the setting compensation elastic piece, can when the nut cover and piston cover produce gap due to thermal expansion and contraction, the elastic force produced by the deformation of elastic piece is compensated, prevent the parking force loss caused by the contraction of parts, thereby improve the safety and stability of parking.

[0005] To realize the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] The utility model provides a kind of large-sized heavy vehicle parking anti-slip device, including caliper body and the parking assembly connected with the caliper body, the parking assembly includes rotary drive device, threaded rotating rod, nut sleeve and piston sleeve;The threaded rotating rod is connected to the caliper body, and the rotary drive device is connected the threaded rotating rod and can drive its rotation;The caliper body is equipped with installation cavity, one end of the threaded rotating rod extends into the installation cavity, and is connected the nut sleeve;The piston sleeve is movably sleeved on the outside of the nut sleeve, and the piston sleeve is rotationally limited, one end of the piston sleeve extends out of the installation cavity, and is fixedly provided with end plate, the outside of the end plate is connected with friction plate, and the inside of the end plate is used to push-fit with the nut;The outside of the nut sleeve is fixedly provided with ring plate, and compensation elastic element is arranged between the ring plate and the end plate, one end of the compensation elastic element is in contact with the ring plate, and the other end is in contact with the end plate.

[0007] Further, the compensation elastic element is a disc spring, which is sleeved on the outside of the nut sleeve.

[0008] Further, the compensation elastic element includes a plurality of springs, and the plurality of springs are distributed along the circumference of the outer periphery of the nut sleeve.

[0009] Further, the upper portion of the inner cavity of the nut sleeve is provided with internal threads, and the lower portion of the inner cavity of the nut sleeve is a through cavity, and the through cavity of the nut sleeve has a gap with the threaded rotating rod;The inner side of the middle portion of the end plate is provided with an inner groove, the upper portion of the inner groove is provided with a ring of inclined surface, and the lower end of the nut sleeve is provided with a taper structure, and the taper structure is used for abutting and cooperating with the inclined surface.

[0010] Further, the caliper body is connected with two parallel parking assemblies, and the end plates of the two parking assemblies are respectively in contact with the friction plate.

[0011] Further, the inner cavity of the nut sleeve is a polygonal column groove structure, and the ring plate is a polygonal column structure corresponding to the inner cavity of the nut sleeve.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1、By setting compensation elastic element, when the nut sleeve and the piston sleeve produce gap due to thermal expansion and contraction, the elastic force generated by the deformation of the elastic element is compensated, which prevents the loss of parking force caused by the cooling shrinkage of parts, thereby improving the safety and stability of parking;

[0014] 2. The compensating elastic member uses a disc spring sleeved on the nut sleeve. Due to the physical properties of the disc spring itself, it can provide a large reaction force with a small deformation. It not only compensates for the effects of thermal expansion and contraction, but also enhances the transmission of parking force during parking, ensuring that the friction plate is stably pressed against the brake disc, achieving a reliable parking effect.

[0015] 3. The upper part of the inner cavity of the nut sleeve is provided with an internal thread, and the lower part is a through cavity. As a result, the nut sleeve cooperates with the slope surface of the groove in the piston sleeve, so that the nut sleeve can be slightly tightened during axial movement, and its restoring expansion force is used to strengthen the pressing effect on the piston sleeve and the friction plate, thereby improving the contact stability between the friction plate and the brake disc and enhancing the parking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the parking anti-slope device in an embodiment of the present application;

[0018] Figure 2 This is a schematic cross-sectional view of the parking anti-slope device in an embodiment of the present application;

[0019] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0020] In the figure: 1, caliper body; 2, rotary drive device; 3, threaded rotary rod; 4, nut sleeve; 4a, ring plate; 5, piston sleeve; 5a, end plate; 6, friction plate; 7, compensation elastic member; 8, inner groove. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings to clearly and completely describe the technical solution of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, or it is the orientation or position relation that the utility model product uses usually, only is for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, constructs and operates with a particular orientation, therefore can not be understood as the limitation of the utility model. In addition, the term "first", "second", "third" and so on are only used for distinguishing description, and can not be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the utility model, it also needs to explain that, unless otherwise expressly provided and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] The existing large load vehicle parking system usually relies on a single mechanical structure to realize the parking function, and lacks an effective compensation mechanism for the change of parking force caused by thermal expansion and contraction. Therefore, after parking in a high temperature environment, as the temperature decreases, the parking system may be insufficient due to the contraction of parts, thereby increasing the risk of hill rolling.

[0026] In view of the above technical problems, the embodiment of the application provides a large load vehicle parking anti-slip device, which comprises a caliper body 1 and a parking assembly connected with the caliper body 1, the parking assembly comprising a rotary driving device 2, a threaded rotating rod 3, a nut sleeve 4 and a piston sleeve 5; the threaded rotating rod 3 is connected to the caliper body 1, and the rotary driving device 2 is connected to the threaded rotating rod 3 and can drive the rotation thereof; the caliper body 1 is provided with a mounting cavity, one end of the threaded rotating rod 3 extends into the mounting cavity and is connected to the nut sleeve 4; the piston sleeve 5 movably sleeves the outside of the nut sleeve 4 and rotationally limits the piston sleeve 5, one end of the piston sleeve 5 extends out of the mounting cavity and is fixedly provided with an end plate 5a, the outside of the end plate 5a is connected with a friction plate 6, and the inside of the end plate 5a is used for abutting pushing cooperation with the nut sleeve 4; the outside of the nut sleeve 4 is fixedly provided with a ring plate 4a, a compensation elastic element 7 is arranged between the ring plate 4a and the end plate 5a, one end of the compensation elastic element 7 abuts against the ring plate 4a, and the other end abuts against the end plate 5a.

[0027] When parking, the rotating driving device 2 drives the threaded rotating rod 3 to rotate, and since the nut sleeve 4 is rotationally limited by the piston sleeve 5, the nut sleeve 4 will move axially and abut against the end plate 5a of the piston sleeve 5, thereby pushing the piston sleeve 5 to slide axially in the installation cavity. The sliding of the piston sleeve 5 makes the friction plate 6 at the end of the piston sleeve 5 abut against the brake disc, thereby realizing the parking function.

[0028] The device of the embodiment is innovative in that the compensation elastic member 7 is arranged between the ring plate 4a of the nut sleeve 4 and the end plate 5a of the piston sleeve 5. When assembled, a gap is reserved between the nut sleeve 4 and the end plate 5a, and the compensation elastic member 7 is compressed and stores elastic potential energy in the initial operation. When the threaded rotating rod 3 and the nut sleeve 4 are cooled due to high temperature, the nut sleeve 4 will slightly retreat, and at this time, the elastic force of the compensation elastic member 7 can compensate for the parking force loss of the nut sleeve 4 and the piston sleeve 5 due to thermal expansion and contraction, thereby effectively preventing parking failure and ensuring parking safety.

[0029] In some embodiments, the compensation elastic member 7 is a disc spring, which is sleeved on the outside of the nut sleeve 4. As the compensation elastic member 7, the disc spring has high rigidity and can provide a large counterforce under a small deformation, and can compensate for the gap between the nut sleeve 4 and the piston sleeve 5 due to thermal expansion and contraction through the elastic force generated by the deformation thereof.

[0030] In some embodiments, the compensation elastic member 7 includes a plurality of springs, which are distributed in an array along the circumference of the outer periphery of the nut sleeve 4. The plurality of springs distributed on the outer periphery of the nut sleeve 4 collectively bear and transmit the parking force, so that the piston sleeve 5 and the friction plate 6 at the end thereof can stably abut against the brake disc, thereby improving the stability and reliability of the parking system.

[0031] The side end surface of the ring plate 4a is provided with a plurality of first positioning pins, and the inner side of the end plate 5a is provided with a plurality of second positioning pins, which correspond to the first positioning pins one by one; one end of each spring is sleeved on the corresponding first positioning pin, and the other end is sleeved on the corresponding second positioning pin.

[0032] The plurality of springs are mounted around the nut sleeve, and the first positioning pins and the second positioning pins play the role of precise positioning, thereby providing stable support points for the springs and preventing the springs from deviating and shaking in the working process.

[0033] In some embodiments, the inner cavity of the nut sleeve 4 is provided with an internal thread at the upper portion, the inner cavity of the nut sleeve 4 is a through cavity at the lower portion, and the through cavity of the nut sleeve 4 has a gap with the threaded rotating rod 3; the inner side of the end plate 5a is provided with an inner recess 8, the upper portion of the inner recess 8 is provided with a ring of slope surfaces, and the lower end of the nut sleeve 4 is provided with a table cone structure for abutting and cooperating with the slope surfaces.

[0034] The inner cavity of the nut sleeve 4 is internally threaded to be screwed with the threaded spindle 3, so that the axial movement of the nut sleeve 4 is driven by rotating the threaded spindle 3. When the nut sleeve 4 moves axially with the rotation of the threaded spindle 3, the conical structure at the lower end of the nut sleeve 4 abuts against the inclined surface of the inner groove 8. Since there is a gap between the through cavity of the nut sleeve 4 and the threaded spindle 3, the lower part of the nut sleeve 4 is slightly tightened, so that the restoring expansion force of the nut sleeve 4 is used to strengthen the abutting effect of the piston sleeve 5 and the friction plate 6, and the friction plate 6 is more stably contacted with the brake disc.

[0035] In some embodiments, the caliper body 1 connects two parallel parking assemblies, and the end plates 5a of the two parking assemblies are respectively in contact with the friction plates 6.

[0036] When the parking is started, the rotating driving devices 2 of the two parking assemblies respectively drive the threaded spindles 3 to rotate, and then drive the two nut sleeves 4 to move axially together, so that the two piston sleeves 5 synchronously push the friction plates 6, and the friction force of the friction plates 6 on the brake disc is strengthened.

[0037] In some embodiments, the inner cavity of the piston sleeve 5 is a polygonal column groove structure, and the ring plate 4a is a polygonal column body structure corresponding to the inner cavity of the piston sleeve 5.

[0038] Since the ring plate 4a and the piston sleeve 5 are matched in the polygonal column body and column groove mode, the ring plate 4a is limited by the piston sleeve 5, so that the rotation of the threaded spindle 3 is converted into the axial movement of the nut sleeve 4.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A parking anti-slip device for large-scale heavy-duty vehicles, characterized in that: The invention comprises a caliper body (1) and a parking assembly connected to the caliper body (1), wherein the parking assembly comprises a rotation drive device (2), a threaded rotary rod (3), a nut sleeve (4) and a piston sleeve (5); the threaded rotary rod (3) is connected to the caliper body (1), and the rotation drive device (2) is connected to the threaded rotary rod (3) and can drive the threaded rotary rod (3) to rotate; a mounting cavity is provided in the caliper body (1), one end of the threaded rotary rod (3) extends into the mounting cavity and is connected to the nut sleeve (4); the piston sleeve (5) is movably sleeved on the outside of the nut sleeve (4) and limits the rotation of the piston sleeve (5); one end of the piston sleeve (5) extends out of the mounting cavity and is fixedly provided with an end plate (5a), the outer side of the end plate (5a) is connected to the friction plate (6), and the inner side of the end plate (5a) is used for pushing and matching with the nut sleeve (4); A ring plate (4a) is fixedly provided on the outer side of the nut sleeve (4), and a compensation elastic member (7) is provided between the ring plate (4a) and the end plate (5a), with one end of the compensation elastic member (7) abutting against the ring plate (4a) and the other end abutting against the end plate (5a).

2. A large-scale heavy-duty vehicle parking anti-slope device according to claim 1, characterized in that: The compensating elastic member (7) is a disc spring, and the disc spring is sleeved on the outside of the nut sleeve (4).

3. The large-scale heavy-duty vehicle parking anti-slope device according to claim 1, characterized in that: The compensating elastic member (7) comprises a plurality of springs, and the plurality of springs are distributed along a circumferential array on the outer periphery of the nut sleeve (4).

4. The large-scale heavy-duty vehicle parking anti-slope device according to claim 1, characterized in that: The upper portion of the inner cavity of the nut sleeve (4) is provided with an internal thread, the lower portion of the inner cavity of the nut sleeve (4) is a through cavity, and a gap is provided between the through cavity of the nut sleeve (4) and the threaded rotating rod (3); An inner groove (8) is provided in the middle of the inner side of the end plate (5a), and a circle of sloped surface is provided on the upper part of the inner groove (8). A cone structure is provided at the lower end of the nut sleeve (4), and the cone structure is used to abut and cooperate with the sloped surface.

5. The large-scale heavy-duty vehicle parking anti-slope device according to claim 1, characterized in that: The caliper body (1) is connected to the two parking assemblies arranged in parallel, and the end plates (5a) of the two parking assemblies are respectively in contact with the friction plates (6).

6. The large-scale heavy-duty vehicle parking anti-slope device according to claim 1, characterized in that: The inner cavity of the nut sleeve (4) is a polygonal column groove structure, and the ring plate (4a) is a polygonal column structure corresponding to the inner cavity of the nut sleeve (4).

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