CN208074070U - A kind of twin ring spring buffer unit - Google Patents

Abstract

The utility model discloses a double-connected annular spring buffer device, which comprises a first annular outer ring, a second annular outer ring, a first connecting plate, a second connecting plate, a shell and two groups of buffering units. The buffer unit includes a bracket barrel, an annular spring, a piston rod, a sleeve nut, a flange bush, a nut, a spring washer and two polyurethane washers. The bracket tube is arranged between the first annular outer ring and the second annular outer ring, and is fixedly connected with them respectively. The inner cavity of the bracket tube is a three-stage through hole, and the ring spring and polyurethane gasket that play a buffer role are arranged inside the bracket tube. And through the step limit of the inner cavity of the bracket barrel, the piston rod passes through the through hole of the bracket barrel and pushes against the polyurethane washer positioned at the front end of the ring spring through the lower end surface of the boss on the rod body. The device not only satisfies the cushioning function of the buffer, but also has the functions of supporting and guiding, and has the advantages of simple and compact structure, small weight and high reliability.

Description

A double-connected ring spring buffer device

technical field

The utility model belongs to the impact load buffering technology, in particular to a double-connected ring spring buffering device.

Background technique

The buffer is a device that provides cushioning at the end of the motion stroke, prolongs the action time of the impact load, absorbs and transforms the kinetic energy of the impact load, and thereby minimizes the adverse effects of mechanical impact on the equipment. The moving body is made of light alloy and is equipped with precision electronic instruments and other equipment. The severe impact load generated during work will bring a huge recoil impulse to the moving body. In order to prevent damage to the moving body, load-bearing support structure and electronic equipment during launch and to realize the recoil and reset functions of the moving body, it is necessary to add corresponding buffer devices to the moving body.

However, traditional moving body buffer devices usually use multiple sets of brackets and guide rails on the shell, buffer components, and moving body to complete the support and guidance, which not only brings difficulties in assembly and positioning, but also increases the mass of the system. At the same time, the increase in the number of components leads to a decrease in the reliability of the system under dynamic loads. This is contrary to the requirement of miniaturization, light weight and high reliability buffer.

Chinese patent 201620582155.5 discloses "rail buffer", which includes a housing provided with a guide groove and a hollow hole, a buffer frame, a rack in the hollow hole, a gear assembly and a spring that can rotate relative to the buffer frame. The scheme itself does not have a support and guide structure for the impact object, and additional guide rails and brackets must be added for the impact object. In addition, the scheme adopts a structure combining gear components and racks. The number of parts is large and the structure is relatively complicated. The reliability is low under the condition of large shock load.

Chinese patent 201420656951.X discloses "A kind of guide rail buffer", which includes a bracket, a damper, a spring located on the brackets on both sides, a slider and a shift fork arranged on the slider, wherein the bracket is provided with Room for the damper, also includes a pair of bayonet mounts. The solution adopts a pair of bayonet structures that are symmetrically arranged on both sides of the buffer support and clamped to the fixed rail. This solution itself does not have a support and guide structure for the impact object, and additional guide rails and brackets must be added for the impact object. The guide rail and the buffer are still independently separated in this solution, and it is difficult to locate during assembly.

Contents of the invention

The purpose of this utility model is to provide a double-connected annular spring buffer device, which not only satisfies the buffering function of the buffer, but also has the function of supporting and guiding, and overcomes the assembly and positioning caused by the multiple sets of guide rails and brackets in the traditional moving body buffer device. Difficulties, excessive system quality, low reliability and other issues.

The solution to realize the purpose of this utility model is: a double-connected annular spring buffer device, including a first annular outer ring, a second annular outer ring, a first connecting plate, a second connecting plate, a housing and two groups of buffer units, The first annular outer ring and the second annular outer ring are arranged in the housing in parallel and at intervals. The inner wall of the first annular outer ring is symmetrically provided with a pair of mounting holes, and the inner wall of the second annular outer ring is symmetrically provided with a pair of mounting holes. A group of buffer units are inserted simultaneously. Through a mounting hole on the first annular outer ring and a mounting hole on the second annular outer ring, the moving body is arranged in the housing, and passes through the first annular outer ring and the second annular outer ring, and one end of the moving body is connected to the second annular outer ring. The center of one connecting plate is fixedly connected, and the other end is fixedly connected with the center of the second connecting plate. The two ends of the first connecting plate are respectively set on the buffer unit, and the two ends of the second connecting plate are respectively set on the buffer unit.

Compared with the prior art, the utility model has the following significant advantages: (1) The buffer unit has the functions of supporting and guiding, replacing multiple sets of brackets and guide rails on the traditional buffer, which facilitates assembly and positioning, and reduces Improve the quality of the system and improve the reliability of the system; (2) When the buffer is working, each set of threaded joints does not directly bear the axial impact load, and the connection is tight and the reliability is high; (3) The overall structure of the buffer device is compact, Simple structure, easy to process and manufacture; (4) Cushion performance is little affected by temperature.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a double-connected annular spring buffer device of the present invention.

Fig. 2 is a structural schematic diagram of the first annular outer ring and the second annular outer ring of the present invention.

Fig. 3 is a structural schematic diagram of the support cylinder of the present invention.

Fig. 4 is a structural schematic diagram of the piston rod of the present invention.

Fig. 5 is a schematic diagram of the assembly structure of the buffer unit of the present invention.

Fig. 6 is a cross-sectional view of the overall structure of a double-connected annular spring buffer device of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

1 to 6, a double ring spring buffer device, including the first annular outer ring 6, the second annular outer ring 11, the first connecting plate 5, the second connecting plate 12, the shell 14 and two sets of buffer unit, the first annular outer ring 6 and the second annular outer ring 11 are arranged in parallel and spaced in the housing 14, the inner wall of the first annular outer ring 6 is symmetrically provided with a pair of installation holes, and the inner wall of the second annular outer ring 11 is symmetrically provided with a pair of installation holes , a group of buffer units pass through a mounting hole on the first annular outer ring 6 and a mounting hole on the second annular outer ring 11 at the same time, and the moving body 13 is arranged in the housing 14 and passes through the first annular outer ring 6 And the second annular outer ring 11 is not in contact with the first annular outer ring 6 and the second annular outer ring 11, one end of the moving body 13 is fixedly connected with the center of the first connecting plate 5, and the other end is fixedly connected with the center of the second connecting plate 12, The two ends of the first connecting plate 5 are respectively set on the buffer unit, and the two ends of the second connecting plate 12 are respectively set on the buffer unit.

The buffer unit includes a bracket tube 9, an annular spring 7, a piston rod 4, a sleeve nut 3, a flange bush 10, a nut 1, a spring washer 2 and two polyurethane washers 8; the inner cavity of the bracket tube 9 is a third-order through hole , from the first annular outer ring 6 to the second annular outer ring 11 are the first through hole, the second through hole and the third through hole, and the bracket tube 9 is arranged on the first annular outer ring 6 and the second annular outer ring 11, and they are fixedly connected by bolts respectively. A ring of bosses are arranged on the body of the piston rod 4. The end face of the boss close to the direction of the second annular outer ring 11 is the lower end face, and the ring spring 7 is located in the second through hole. Inside, two polyurethane washers 8 are arranged at both ends of the ring spring 7 to reduce the stiffness of the ring spring system. The size of the polyurethane washers 8 can be properly adjusted according to actual needs to ensure that the stiffness of the buffer system reaches a predetermined value. The piston rod 4 passes through the bracket barrel 9 and the annular spring 7 and two polyurethane washers 8 therein, and the lower end surface of the boss is against the polyurethane washer 8 located at the front end of the annular spring 7. When the annular spring 7 is not stressed, the flange lining The sleeve 10 includes a flange and a sleeve that is fixed to the flange, wherein the flange is fixed to the rear end face of the second connecting plate 12, and the sleeve and the tail of the piston rod 4 are screwed and inserted into the third The through hole bears against the polyurethane washer 8 positioned at the rear end of the annular spring 7, the sleeve nut 3 is set on the boss of the piston rod 4, and is connected with the first through hole by threads, and the front end of the boss of the piston rod 4 is against the first The rear end face of the connecting plate 5 is compressed and limited by the nut 1 and the spring washer 2 .

The piston rod 4 is made into a hollow rod to reduce the weight of the device

A circle of grooves is arranged on the boss of the piston rod 4 .

The first connecting plate 5 is elongated, with a first through hole in the center and second through holes at both ends, wherein the first through hole is fixedly connected with the moving body 13, and the two second through holes are respectively Set on the piston rod 4 of the two groups of buffer units. The second connecting plate 12 is elongated, with a third through hole in the center and fourth through holes at both ends, wherein the third through hole is fixedly connected with the moving body 13, and the two fourth through holes are respectively Set on the flange bushings 10 of the two groups of buffer units, and connect with the flanges of the flange bushings through bolts.

When the buffer device is working, the moving body 13 is recoiled by the impact load, thus driving the system composed of the nut 1, the spring washer 22, the first connecting plate 3, the piston rod 4, the second connecting plate 12 and the flange bushing 10 to move forward together. After the movement, the movement of the piston rod 4 is restricted by the flange bushing 10, the support tube 9 and the cover nut 3, and it can only do linear reciprocating motion, which plays a guiding role in the backseat re-entry process. The length of the part of the boss on the piston rod 4 protruding from the sleeve nut 3 is less than the maximum recoil stroke of the moving body, so as to avoid the formation of local steps due to the wear and tear of the reciprocating motion of the piston rod 4 and affect the performance.

The impact force acts on the piston rod 4 through the first connecting plate 3 , the second connecting plate 11 and the flange bushing 10 . The boss on the piston rod compresses the polyurethane washer 8 and the annular spring 7, and the step of the front end step of the third through hole of the bracket tube 8 is pressed against the polyurethane washer 8 and the annular spring 7, and the polyurethane washer 8 and the annular spring 7 are compressed, and the moving body The back seat is cushioned. The relatively large impact load is finally transmitted to the housing 14 through the bracket barrel 9 and the second annular outer ring 11 in the form of a relatively small annular spring recoil. After the buffer is over, the compressed and deformed ring spring 7 gradually returns to its original shape, so that the piston rod system is reset and ready to bear the next impact load. During the entire buffering process, the front connecting plate 4 is in contact with the front end face of the boss of the piston rod 4, the first annular outer ring 6 is in contact with the front flange end face of the bracket barrel 9, and the rear flange end face of the bracket barrel 9 is in contact with the second annular outer ring. The ring 11 is in contact, and the rear connecting plate 12 is in contact with the rear end surface of the flange of the flange bushing 12 . When the buffer is working, the threaded joints of the buffer unit are not subject to large axial impact loads.

The weight of the moving body 13 is transmitted to the piston rod 4 through the first connecting plate 5 and the second connecting plate 12, and then to the first annular outer ring 6 and the second annular ring through the sleeve nut 3, the flange bushing 10 and the bracket barrel 9. On the outer ring 11, large rounded corners are provided under the mounting holes of the first annular outer ring 6 and the second annular outer ring 11 to improve the support rigidity, and the weight of the moving body 13 is finally transferred to the outer shell 14 to support the entire launch system effect.

Claims (6)

1. A duplex annular spring buffer device, characterized in that it includes a first annular outer ring (6), a second annular outer ring (11), a first connecting plate (5), and a second connecting plate (12) 1. The shell (14) and two sets of buffer units, the first annular outer ring (6) and the second annular outer ring (11) are arranged in the shell (14) at intervals in parallel, and the inner wall of the first annular outer ring (6) is symmetrically provided with a For the mounting holes, a pair of mounting holes are symmetrically provided on the inner wall of the second annular outer ring (11), and a group of buffer units pass through a mounting hole on the first annular outer ring (6) and on the second annular outer ring (11) at the same time. A mounting hole, the moving body (13) is set in the casing (14), and passes through the first annular outer ring (6) and the second annular outer ring (11), one end of the moving body (13) is connected to the first connecting plate (5) The center is fixedly connected, and the other end is fixedly connected to the center of the second connecting plate (12). Both ends of the first connecting plate (5) are respectively set on the buffer unit, and both ends of the second connecting plate (12) are respectively set on the on the unit. 2. The double-connected ring spring buffer device according to claim 1, characterized in that: the buffer unit includes a bracket cylinder (9), a ring spring (7), a piston rod (4), a sleeve nut (3), a flange bushing (10), nut (1), spring washer (2) and two polyurethane washers (8); the inner cavity of the support cylinder (9) is a third-order through hole, from the first annular outer ring (6) to the second The directions of the two annular outer rings (11) are the first through hole, the second through hole and the third through hole in turn, and the bracket tube (9) is arranged between the first annular outer ring (6) and the second annular outer ring (11). between them, and are fixedly connected with them respectively, the body of the piston rod (4) is provided with a circle of bosses, the end face of the boss close to the direction of the second annular outer ring (11) is the lower end face, and the ring spring (7) is located on the second In the two through holes, two polyurethane washers (8) are located at both ends of the ring spring (7), and the piston rod (4) passes through the bracket barrel (9) and the ring spring (7) and two polyurethane washers (8) , the lower end surface of the boss is against the polyurethane washer (8) at the front end of the ring spring (7). When the ring spring (7) is not stressed, the flange bushing (10) includes the flange and the flange Connected bushing, wherein the flange is fixedly connected to the rear end of the second connecting plate (12), the bushing is fixedly connected to the tail of the piston rod (4), and extends into the third through hole against the ring spring (7) The polyurethane washer (8) at the rear end and the sleeve nut (3) are set on the boss of the piston rod (4), and are fixedly connected with the first through hole through threads, and the front end of the boss of the piston rod (4) is against the first The rear end face of the connecting plate (5) is compressed and limited by the nut (1) and the spring washer (2). 3. The double-connected annular spring buffer device according to claim 2, characterized in that: the piston rod (4) is a hollow rod. 4. The double-connected annular spring buffer device according to any one of claims 2 or 3, characterized in that: the boss of the piston rod (4) is provided with a circle of grooves. 5. The double-connected annular spring buffer device according to claim 1, characterized in that: the first connecting plate (5) is elongated, with a first through hole in the center, and a second through hole at both ends. Through holes, wherein the first through hole is fixedly connected with the moving body (13), and the two second through holes are respectively sleeved on two groups of buffer units. 6. The double-connected annular spring buffer device according to claim 1, characterized in that: the second connecting plate (12) is elongated, with a third through hole in the center, and fourth through holes at both ends. Through holes, wherein the third through hole is fixedly connected with the moving body (13), and the two fourth through holes are respectively sleeved on the two groups of buffer units.