CN217006375U

CN217006375U - Active reset device for crash trolley speed reducing mechanism

Info

Publication number: CN217006375U
Application number: CN202220881077.4U
Authority: CN
Inventors: 余海龙; 何恩泽; 谌发坤; 史爱民; 赵清江; 刘明; 王国杰; 张健; 范体强; 黄杰; 熊玥
Original assignee: Chongqing Kairui Testing Equipment Co ltd; China Automotive Engineering Research Institute Co Ltd
Current assignee: Chongqing Kairui Testing Equipment Co ltd; China Automotive Engineering Research Institute Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-07-19
Anticipated expiration: 2032-04-14

Abstract

The utility model relates to the technical field of automobile part testing, in particular to an active reset device for a speed reducing mechanism of a collision trolley, which comprises a rack, wherein a multi-friction-plate structure is arranged in the rack and comprises a plurality of friction bodies and brake pads which are arranged at intervals, one end of each brake pad extends out of the rack, and when one end of each brake pad extending out of the rack is acted by an acting force, the other end of each brake pad can extend out of the other end of the rack; an elastic piece is arranged outside the frame, one end of the elastic piece is connected with the frame, and the other end of the elastic piece is connected with the brake pad. By adopting the scheme, the technical problem that the test time cost is higher due to the fact that the reinforcing steel bar is adopted to decelerate in the prior art can be solved.

Description

Active reset device for crash trolley speed reducing mechanism

Technical Field

The utility model relates to the technical field of automobile part testing, in particular to an active resetting device for a collision trolley speed reducing mechanism.

Background

When the automobile collides with an obstacle in the front, the energy generated by the collision needs to be fully absorbed by the deformation of the main bearing structure at the front part of the automobile so as to protect passengers on the automobile to the maximum extent. The anti-collision cross beam assembly and the cabin longitudinal beam in the traditional vehicle body structure can deal with the collision situation when the overlapping area of the vehicle and the obstacle is larger in a certain speed through reasonable strength design. However, when the vehicle overlaps an obstacle by less than 25% of the width of the vehicle body, the cross-member assembly and the cabin side members cannot sufficiently participate in such a collision process, and cannot achieve a sufficient energy absorption and buffering effect, which may cause the passenger cabin to be subjected to a large collision force to deform unacceptably, thereby threatening the life safety of passengers. Therefore, the safety index of the Chinese insurance automobile sets a front offset collision safety evaluation item (hereinafter referred to as '25% small offset collision') with a collision speed of 64.4Km/h and a vehicle body and rigid barrier wall overlapping rate of 25%.

In a 25% small offset crash real vehicle test, due to the limitations of field of view, instrumentation, test convenience and sample vehicle cost, test data related to dynamic response of the impact side wheels and chassis failure are difficult to capture in detail by the instrumentation. In order to obtain more test data aiming at dynamic response and failure separation phenomena of a suspension and a wheel subsystem from a 25% small-offset collision test, special tests on the failure condition of the suspension and the wheel subsystem are required, and the applicant proposes a 25% small-offset collision suspension subsystem test platform which can carry out the 25% small-offset collision test on a test piece comprising the suspension and the wheel subsystem. The test needs to absorb redundant kinetic energy to the trolley loaded with the test piece through the speed reduction system, so as to reduce the speed and brake, the speed reduction system comprises a multi-friction-plate structure consisting of a plurality of friction bodies and a brake block, during the collision test, the trolley collides with the brake block, the friction force between the friction bodies and the brake block enables the trolley to reduce the speed and brake, but the friction bodies and the brake block have overlarge impact force due to the trolley, the elastic deformation condition can occur, after the test is finished, the elastic deformation enables the friction bodies and the brake block to still have larger friction force, the brake block can not reset automatically, and the manual reset of the brake block is also difficult, so that an active reset device capable of automatically resetting the brake block in the speed reduction mechanism is needed urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an active reset device for a collision trolley speed reducing mechanism, which aims to solve the technical problem of higher test time cost caused by speed reduction by adopting a steel bar in the prior art.

The present invention provides the following basic scheme:

the active reset device for the collision trolley speed reducing mechanism comprises a rack, wherein a multi-friction-plate structure is arranged in the rack and comprises a plurality of friction bodies and brake pads which are arranged at intervals, one end of each brake pad extends out of the rack, and when one end of each brake pad extending out of the rack is acted by force, the other end of each brake pad can extend out of the other end of the rack; an elastic piece is arranged outside the frame, one end of the elastic piece is connected with the frame, and the other end of the elastic piece is connected with the brake pad.

The basic scheme has the beneficial effects that: during the test, the friction body compresses tightly with the brake block, and the impact force that the platform truck brought is received to the one end of brake block for the brake block takes place to remove, and the elastic component is stretched simultaneously. The friction force between the brake pad and the friction body overcomes the impact force and blocks the movement of the brake pad, so that the movement of the trolley is blocked, and the trolley is quickly braked. After the test is finished, the friction body and the brake pad are loosened, and the brake pad is automatically reset by the tensile force generated by the elastic piece. Compared with the prior art that the steel bars are replaced, the brake block can be reset through the elastic piece, so that the next test is carried out, the test efficiency is greatly improved, and the time cost is reduced.

Further, still be equipped with in the frame with frame sliding connection's horizontal pole, the through-hole has all been seted up to the one end that the brake block atress stretches out, and the horizontal pole passes the through-hole, and the one end that the frame was kept away from to the elastic component is connected with the horizontal pole. Has the advantages that: the setting of horizontal pole for a plurality of brake blocks move simultaneously, can reset a plurality of brake blocks simultaneously through the elastic component.

Furthermore, the outer both sides of frame are equipped with first mounting bracket, and the both ends of horizontal pole are equipped with the second mounting bracket, and the both ends of elastic component are connected with first mounting bracket, the second mounting bracket that are located the frame homonymy respectively. Has the beneficial effects that: first mounting bracket and second mounting bracket provide the mounted position for the elastic component, and the elastic component setting is in the both sides of frame, and during reseing, exert the effort simultaneously, the brake block of being convenient for resets.

Furthermore, the number of the elastic parts positioned on the same side of the rack is two. Has the advantages that: the elastic component quantity of frame homonymy is two, the setting of a plurality of elastic components, and the pulling force that the increase elastic component resets for the brake block can reset fast.

Furthermore, the top and the bottom of the first mounting frame and the second mounting frame are respectively provided with a connecting column, and the elastic part is hung on the connecting columns. Has the advantages that: the arrangement of the connecting column facilitates the assembly and disassembly of the elastic piece.

Further, the elastic member is a return spring. Has the advantages that: the elastic piece adopts a return spring, and has simple structure and convenient use.

Furthermore, a plurality of guide strips are further arranged in the rack and fixedly connected with the rack, and the guide strips are respectively positioned above the brake pads and between the two friction bodies arranged at intervals. Has the advantages that: the setting of gib block leads the removal of brake block.

Furthermore, the top and the bottom of the friction body extend to form a blocking portion, a blocking limiting portion and a limiting block which are used for limiting the blocking portion are further arranged in the frame, and the blocking limiting portion and the limiting block are respectively abutted against the two ends of the blocking portion along the movement direction of the brake pad. Has the advantages that: the friction body is limited by the limiting part and the limiting block, so that the friction body cannot move along the motion direction of the brake pad, and the friction force between the friction body and the brake pad is ensured.

Furthermore, an oil cylinder is arranged on one side outside the rack, a piston rod of the oil cylinder extends into the rack, and the friction body on one side along the distribution direction of the friction body is abutted against the piston rod. Has the beneficial effects that: the arrangement of the oil cylinder controls the compression and the release between the friction body and the brake pad by controlling the extension and the retraction of the piston rod. During collision test, the piston rod extends out, the friction body is tightly pressed with the brake pad, the trolley is braked through the friction force between the friction body and the brake pad, after the test is finished, the piston rod contracts, the friction body is loosened with the brake pad, and the brake pad resets.

Furthermore, one end of the brake pad extending out of the frame is provided with a buffer block. Has the advantages that: the setting of buffer block cushions the impact force of receiving, reduces the damage that the impact force caused many friction disc structures.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of an active return device for a crash truck deceleration mechanism according to the present invention;

FIG. 2 is a front view of a friction body of an embodiment of the active return apparatus for a crash truck deceleration mechanism of the present invention;

FIG. 3 is a schematic structural view of an embodiment of the active return apparatus for a crash truck speed reduction mechanism of the present invention with a portion of the frame removed;

fig. 4 is a front view of the embodiment of the active return apparatus for a crash truck deceleration mechanism of the present invention after the elastic member is stretched.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the brake comprises a frame 1, a brake pad 2, a first friction body 3, a friction plate 4, a blocking part 5, a limiting block 6, a first guide strip 7, a second guide strip 8, a buffer block 9, a reinforcing structure 10, an oil cylinder 11, a strip-shaped hole 12, a cross rod 13 and an elastic piece 14.

Examples

An active reset device for a collision trolley speed reducing mechanism is shown in fig. 1 and comprises a frame 1, wherein a multi-friction-plate 4 structure is arranged in the frame 1, the multi-friction-plate 4 structure comprises a plurality of friction bodies and brake blocks 2 which are arranged at intervals, in the embodiment, the number of the friction bodies is six, the number of the brake blocks 2 is five, in the embodiment, the friction bodies on two sides are defined as first friction bodies 3, the rest friction bodies are defined as second friction bodies, and one side of each first friction body 3, which is far away from the brake block 2, is respectively abutted against two sides in the frame 1.

As shown in the accompanying drawing 2, the friction body comprises a friction box and a friction plate 4, a mounting hole is formed in the friction box, the friction plate 4 is located in the mounting hole and is detachably connected with the friction box, concretely, one side of the friction plate 4 is located in the mounting hole, the other side of the friction plate extends out of the mounting hole to be abutted against the brake pad 2, the top or the bottom of the friction plate 4 extends to form a protrusion, a through hole corresponding to the protrusion is formed in the friction box, a screw is arranged in the through hole, one end of the screw extends into the mounting hole to be abutted against the side face of the protrusion, and the friction plate 4 is prevented from being separated from the mounting hole. When the friction plate 4 is seriously worn and needs to be replaced, the friction plate 4 can be replaced by taking out the screw.

In this embodiment, the friction box is provided with two mounting holes, the two mounting holes are arranged up and down, the protrusion of the friction plate 4 in the upper mounting hole is located at the top of the friction plate, and the protrusion of the friction plate 4 in the lower mounting hole is located at the bottom of the friction plate. The mounting hole on the friction box of the first friction body 3 is defined as a first mounting hole, the mounting hole on the friction box of the second friction body is defined as a second mounting hole, the first mounting hole is a blind hole and is arranged on one side, away from the rack 1, of the friction box, the first mounting hole corresponds to one friction plate 4, the second mounting hole is a hole penetrating through the friction box, and the second mounting hole corresponds to two friction plates 4.

As shown in the attached drawing 3, the centers of the top and the bottom of the friction body extend to form a blocking part 5, a blocking limiting part and a limiting block 6 for limiting the blocking part 5 are further arranged in the frame 1, the blocking limiting part and the limiting block 6 are respectively abutted against the two ends of the blocking part 5 in the movement direction of the brake pad 2, and one side, far away from the friction body, of the blocking part 5 is respectively abutted against the top and the bottom in the frame 1. In this embodiment, the number of the limiting blocks 6 is two, the two limiting blocks respectively abut against the top and the bottom of the friction body, the top and the bottom in the rack 1 respectively extend to form a blocking limiting portion, the limiting blocks 6 and the blocking limiting portions respectively abut against the two ends of the blocking portion 5 along the movement direction of the brake pad 2, namely, the blocking limiting portion is used for blocking the friction body from moving along the movement direction of the brake pad 2, and the limiting blocks 6 are used for blocking the friction body from moving along the resetting direction of the brake pad 2. A safety pin hole is formed in the limiting block 6, another safety pin hole matched with the safety pin hole for use is formed in the rack 1, and the limiting block 6 is connected with the rack 1 through the safety pin hole in a pin mode. The friction body is convenient to disassemble and assemble due to the arrangement of the limiting block 6, and the limiting block 6 and the limiting blocking part limit the blocking part 5 together. In the process of speed reduction, the acting force brought by the friction body borne by the blocking limiting part is mainly used, and the strength of the blocking limiting part is ensured through the integral processing of the blocking limiting part and the rack 1.

Still be equipped with a plurality of gibs in the frame 1, the gib block is the same with brake block 2's quantity, and the gib block is located brake block 2 tops respectively, and is located respectively between the two friction bodies that the interval set up. The length of the guide strips on the two sides of the distribution direction of the guide strips is greater than that of the rest guide strips, in the embodiment, the guide strips on the two sides are defined as a first guide strip 7, the rest guide strips are defined as a second guide strip 8, the length of the first guide strip 7 is greater than that of the second guide strip 8, specifically, the second guide strip 8 is located in the rack 1, and one end of the first guide strip 7 extends out of the rack 1. The top and the bottom of striking face all extend and form the spacing portion of direction, and the quantity of spacing portion is four, is located the both sides of striking face top and bottom respectively, and the spacing portion of direction is used for spacing first gib block 7. The gib block and 1 fixed connection of frame, in this embodiment, set up threaded hole on the gib block, the screw hole respectively with block spacing portion, stopper 6 is corresponding, set up respectively on stopper 6 and the frame 1 with the through hole that the screw hole cooperation was used, through screw fixed connection gib block and frame 1 to and fixed connection gib block, stopper 6 and frame 1. The safety pin hole plays a role in protection when the guide strip, the limiting block 6 and the rack 1 are fastened by screws and fail.

Frame 1 is all stretched out to the one end of brake block 2, and the one end that brake block 2 stretches out frame 1 is equipped with buffer block 9, and in this embodiment, the material of buffer block 9 is rubber. When the collision body is acted by force, the other end of the brake block 2 can extend out of the other end of the speed reducing frame 1. Be equipped with reinforcing structure 10 between buffer block 9 and brake block 2, reinforcing structure 10 includes a plurality of vertical strengthening ribs of first connecting plate, second connecting plate and a plurality of horizontal strengthening rib, and in this embodiment, the quantity of vertical strengthening rib is three, and the quantity of horizontal strengthening rib is six. Specifically, the one end that brake block 2 stretches out frame 1 is connected with first connecting plate, and one side and vertical strengthening rib fixed connection that brake block 2 was kept away from to first connecting plate, vertical strengthening rib evenly distributed, the one end that first connecting plate was kept away from to vertical strengthening rib are equipped with the second connecting plate, and the second connecting plate passes through bolt fixed connection with buffer block 9. Horizontal strengthening rib evenly distributed is in the both sides of vertical strengthening rib, and the one end of horizontal strengthening rib all is connected with one side of vertical strengthening rib, and is specific, along the vertical strengthening rib of vertical strengthening rib distribution direction both sides respectively with three horizontal strengthening rib fixed connection, in this embodiment, first connecting plate, second connecting plate, vertical strengthening rib and horizontal strengthening rib integrated into one piece.

An oil cylinder 11 is arranged on one side outside the frame 1, the oil cylinder 11 is fixedly connected with the frame 1 through a screw, a piston rod of the oil cylinder 11 extends into the frame 1, and a friction body on one side along the distribution direction of the friction body is abutted against the piston rod, namely one side, away from the brake pad 2, of one of the first friction bodies 3 is abutted against the piston rod.

Relative bar hole 12 that sets up has all been seted up to the one end that buffer block 9 was kept away from to 1 both sides of frame, and the through-hole has all been seted up to the one end that 2 atress of brake block stretched out, still be equipped with in the frame 1 with 1 sliding connection's of frame horizontal pole 13, horizontal pole 13 passes the through-hole, and two bar holes 12 are passed respectively at the both ends of horizontal pole 13 and stretch out frame 1. The outer both sides of frame 1 all are equipped with first mounting bracket, and the both ends of horizontal pole 13 all are equipped with the second mounting bracket, and the top of first mounting bracket and second mounting bracket, bottom all are equipped with the spliced pole, and are concrete, and first mounting bracket and the second mounting bracket that are located 1 one side of frame that is equipped with hydro-cylinder 11 are located the both sides of hydro-cylinder 11 respectively.

Frame 1 still is equipped with elastic component 14 outward, and the one end and the frame 1 of elastic component 14 are connected, and the other end is connected with brake block 2, and is specific, and the both ends of elastic component 14 are connected with first mounting bracket, the second mounting bracket that is located frame 1 homonymy respectively, and elastic component 14 articulates on the spliced pole, and in this embodiment, the elastic component 14 quantity that is located frame 1 homonymy is two, and elastic component 14 is for replying the spring.

The specific implementation process is as follows:

in the initial state, the return spring is in a natural state, and the cross rod 13 is close to the oil cylinder 11. When collision test, the piston rod stretches out, and the friction body compresses tightly with brake block 2, and when buffer block 9 received the striking of platform truck, brake block 2 removed in to frame 1, and brake block 2's removal drives horizontal pole 13 and removes in bar hole 12 for the answer spring is tensile, as shown in figure 4, and the frictional force between brake block 2 and the friction body this moment blocks brake block 2's removal, brakes the platform truck through the frictional force between friction body and the brake block 2. After the test is finished, the piston rod contracts, the friction body and the brake pad 2 are loosened, and the brake pad 2 is reset by means of the elastic force of the return spring.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art, and it will be appreciated by those skilled in the art that the present invention has been made available to those skilled in the art after the filing date or priority date, and that the present invention may be implemented by those skilled in the art by applying ordinary skill in the art, without departing from the spirit and scope of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A initiative resetting means for colliding with platform truck reduction gears, including the frame, its characterized in that: a multi-friction-plate structure is arranged in the rack and comprises a plurality of friction bodies and brake pads which are arranged at intervals, one end of each brake pad extends out of the rack, and when the end of each brake pad extending out of the rack is acted by an acting force, the other end of each brake pad can extend out of the other end of the rack; an elastic piece is arranged outside the frame, one end of the elastic piece is connected with the frame, and the other end of the elastic piece is connected with the brake pad.

2. The active return device for a crash truck deceleration mechanism according to claim 1, characterized in that: still be equipped with in the frame with frame sliding connection's horizontal pole, the through-hole has all been seted up to the one end that the brake block atress stretches out, the horizontal pole passes the through-hole, the elastic component is kept away from the one end of frame and is connected with the horizontal pole.

3. The active return device for a crash truck deceleration mechanism according to claim 2, characterized in that: the outer both sides of frame are equipped with first mounting bracket, and the both ends of horizontal pole are equipped with the second mounting bracket, and the both ends of elastic component are connected with first mounting bracket, the second mounting bracket that is located the frame homonymy respectively.

4. The active return device for a crash truck deceleration mechanism according to claim 3, characterized in that: the number of the elastic pieces positioned on the same side of the rack is two.

5. The active return device for a crash truck deceleration mechanism according to claim 4, characterized in that: the top and the bottom of the first mounting frame and the second mounting frame are both provided with connecting columns, and the elastic parts are hung on the connecting columns.

6. The active return device for a crash truck deceleration mechanism according to any one of claims 1 to 5, characterized in that: the elastic element is a return spring.

7. The active return device for a crash truck deceleration mechanism according to claim 1, characterized in that: still be equipped with a plurality of gibs in the frame, gib s and frame fixed connection, gib s are located brake block top respectively, and are located respectively between the two friction bodies that the interval set up.

8. The active return device for a crash truck deceleration mechanism according to claim 1, characterized in that: the top and the bottom of the friction body extend to form a blocking part, a blocking limiting part and a limiting block which are used for limiting the blocking part are further arranged in the frame, and the blocking limiting part and the limiting block are respectively abutted against the two ends of the blocking part along the motion direction of the brake pad.

9. The active return device for a crash truck deceleration mechanism according to claim 8, characterized in that: an oil cylinder is arranged at one side outside the frame, a piston rod of the oil cylinder extends into the frame, and a friction body at one side along the distribution direction of the friction body is abutted against the piston rod.

10. The active return device for a crash truck deceleration mechanism according to claim 1, characterized in that: one end of the brake pad extending out of the frame is provided with a buffer block.