CN213774955U

CN213774955U - Variable pitch automobile tail gate long spring

Info

Publication number: CN213774955U
Application number: CN202022207786.8U
Authority: CN
Inventors: 李辉; 孙伟龙; 杨炜
Original assignee: Scheider Precision Parts Huzhou Co ltd
Current assignee: Scheider Precision Parts Huzhou Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-23
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a long spring of variable pitch car tail-gate, including internally mounted have the sleeve pipe of spring, set up respectively in the sleeve pipe both ends just are used for the installation to fix with the mode that cup joints the drive unit, the fixed unit of the installation pole of spring, the spring including connect gradually with first long pitch spring part, the short pitch spring part of second and with the long pitch spring part of third that the fixed unit is connected. The utility model designs the long spring into different long and short pitches, thereby achieving the purpose of reducing the attenuation of high-temperature static pressure; meanwhile, a guide telescopic structure is designed, so that the device is convenient to disassemble, overhaul and maintain.

Description

Variable pitch automobile tail gate long spring

Technical Field

The utility model belongs to the technical field of auto-parts, concretely relates to long spring of variable pitch car tail-gate.

Background

The spring is a mechanical part which works by utilizing elasticity, the part made of elastic materials deforms under the action of external force and restores to the original shape after the external force is removed, the spring is made of common spring steel, the types of the spring are complex and various, and the spring mainly comprises a spiral spring, a plate spring, a special-shaped spring and the like according to the shape. The spring is one of three basic elements of industrial products, has wide application, can not separate from springs and spring parts in various machines, and needs a large number of springs for automobiles, aerospace, trains, audio clocks and watches, and the like. In recent years, with the development of national economy, the rapid development of springs is also pulled.

In the prior art, a tail gate spring is one of springs on an automobile, is positioned in an automobile trunk and can be generally called as a trunk spring by people, the tail gate spring is fixed on a hinge, the tail trunk is reliably supported after being opened through a certain angle, the spring is widely used on a car, the operation is labor-saving and quick, and the stop at any angle can be realized. The application number is CN 201820772294.3's document discloses a device of increase tail-gate spring direction, including pipe, plastics axle sleeve, thick aluminium pipe, the lead screw subassembly passes thick aluminium pipe, passes through the nut with screw-nut and is connected, plastics axle sleeve cover passes through threaded connection in the inside one end of thick aluminium pipe, and the pipe passes through threaded connection with screw-nut, is located screw-nut and keeps away from the one end of lead screw, and the spring housing is in the outside of pipe and thick aluminium pipe, and the outside at the spring is installed to the outer tube. The utility model has the advantages that the spring is guided when the spring is pre-installed, and the outer sleeve is easy to work; when the stay bar works, the torsional deformation of the spring is reduced, and the noise is reduced. But the spring force value of the structure can be gradually attenuated in long-term use, and the automobile tail door cannot be effectively opened due to overlarge attenuation of the force value; and need overhaul the nursing to long door spring after long-term the use, the device dismantles complicacy, is unfavorable for overhauing and maintaining.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing problems, the utility model aims to provide a variable pitch automobile tail gate long spring, which is designed into different long and short pitches to achieve the purpose of reducing the attenuation of high temperature static pressure; meanwhile, a guide telescopic structure is designed, so that the device is convenient to disassemble, overhaul and maintain.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

the utility model provides a long spring of variable pitch car tail-gate, including internally mounted have the sleeve pipe of spring, set up respectively in the sleeve pipe both ends just are used for the installation to fix with the mode that cup joints the drive unit, the fixed unit of the installation pole of spring, the spring including connect gradually with first long pitch spring part, the short pitch spring part of second and with the long pitch spring part of third that the fixed unit is connected.

In the design of the scheme, the spring is divided into a second short-pitch spring part, a first long-pitch spring part and a third long-pitch spring part which are connected with two ends of the second short-pitch spring part, the pitches of the first long-pitch spring part and the third long-pitch spring part are the same, and the pitch of the second short-pitch spring part is smaller than the pitches of the first long-pitch spring part and the third long-pitch spring part; the design has realized when the spring compression like this, and the number of turns of second short pitch spring portion presses and, reaches the purpose that the high temperature static pressure decay reduces, makes the whole decay of spring reduce to about 2% from 4%, has improved the life of spring greatly, guarantees effectively opening of tail-gate spring in the car live time.

As a further preference of the utility model, the installation pole include with the dwang of drive unit output shaft, with fixed sleeve pipe and the one end of fixed unit connection connect in the dwang is kept away from one of drive unit output shaft is served, the other end cup joint in fixed sleeve pipe just with the screw rod that has the external screw thread of the internal thread spiro union that sets up on the fixed sleeve pipe inner wall. In this scheme design, installation pole and fixed sleeve not only play the guide effect to the spring, and at the in-process of spring compression, make the non-axial effort at spring both ends reduce to reduce the distortion of spring, increase the life of spring.

As a further preference of the utility model, the fixed sleeve is close to the one end of screw rod is provided with and is used for making screw rod 32 be fixed in the fixed sleeve and set up the limiting plate that makes the passageway that the screw rod passes through and be used for fixing the fixation nut of limiting plate. In this scheme design, this structure setting is used for reducing the installation pole and fixing rocking of cover intertube to reduce wearing and tearing between them, increase the life of structure.

As a further preference of the present invention, the sleeve includes a first fixed pipe and is sleeved on the end portion of the first fixed pipe, and the end portion of the first fixed pipe is provided with a second fixed pipe of a sliding wheel sliding in a sliding groove formed in the inner wall of the first fixed pipe. In this scheme design, gliding design changes the sliding friction between first fixed pipe and the fixed pipe of second into rolling friction, and frictional resistance when reducing two fixed pipe relative motion further reduces the inner wall wearing and tearing of two fixed pipes.

As a further preference of the utility model, the sliding tray is close to the tip of the fixed pipe 11 of second is seted up internally mounted and is used for right the spacing groove of the spacing post of movable pulley. In this scheme design, the design of spacing post not only is used for placing the movable pulley and drops from the spacing inslot, also is used for blockking that debris get into to intraductal influencing device from the gap between first fixed pipe and the fixed pipe of second.

As a further preferred aspect of the present invention, the limiting groove is provided with a jacking spring for jacking the limiting post. In this scheme design, the design of jack-up spring makes spacing post have elastic motion range, has both guaranteed the limiting displacement to the movable pulley, also is convenient for first fixed pipe and the fixed dismantlement when managing the maintenance of need of second.

As a further preference of the present invention, the spacing post is kept away from the end of the spacing groove is provided with a projection having a cross section of a major arc bow. In the design of the scheme, the bulge with the section of the major arc arch is used for reducing the resistance between the limiting column and the sliding wheel during disassembly.

As the utility model discloses a further preferred, the screw rod with the junction of dwang has cup jointed install in first fixed block on the dwang.

As a further preferred aspect of the present invention, the length of the fixing sleeve is equal to or less than the length of the sliding groove.

As a further preferred aspect of the present invention, the length of the screw is less than or equal to the length of the fixing sleeve.

To sum up, the utility model discloses following beneficial effect has:

the utility model discloses be the structure of middle part short pitch, both ends long pitch with the spring design, make it press and the spring circle number when middle part short pitch and, reach the purpose that the high temperature static pressure decay reduces, and can make long spring decay reduce to about 2% by 4%, improved the life of spring greatly, guarantee effectively opening of tail-gate spring in car live time.

The utility model discloses optimized the guide structure to the spring, on the realization is to the basis of spring direction, reduced or avoided the non-axial effort at spring both ends to reduce the distortion of spring, increased the life of spring.

The utility model discloses the convenient maintenance of detachable structure overhauls.

The utility model discloses adaptability is wide, can carry out mass production, and then reduction in production cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Figure 2 is the structure schematic diagram of the sleeve and the installation rod of the utility model.

Fig. 3 is a partial schematic view of the sleeve of the present invention.

Description of the drawings: the spring fixing device comprises a sleeve 1, a second fixing tube 11, a sliding wheel 111, a first fixing tube 12, a sliding groove 121, a limiting groove 121a, a jacking spring 121b, a limiting post 123, a protrusion 123a, a driving unit 2, an installation rod 3, a rotating rod 31, a driving shaft 311, a first fixing block 312, a screw rod 32, a connecting post 321, an external thread 322, a fixing sleeve 33, an internal thread 331, a second reinforcing block 332, a fixing nut 333, a limiting plate 334, a fixing unit 4, a spring 5, a first long-pitch spring part 51, a second short-pitch spring part 52 and a third long-pitch spring part 53.

Detailed Description

Examples

The variable-pitch automobile tail gate long spring provided by the embodiment comprises a sleeve 1, a driving unit 2 and a fixing unit 4, wherein the sleeve 1 is internally provided with a spring 5, the driving unit 2 is respectively arranged at two ends of the sleeve 1 and is used for installing an installing rod 3 for fixing the spring 5 in a sleeved mode, and the spring 5 comprises a first long-pitch spring part 51, a second short-pitch spring part 52 and a third long-pitch spring part 53 which are sequentially connected and connected with the driving unit 2; in the embodiment, the driving unit 2 and the fixing unit 4 are conventional structures, and are not described in detail. The first long-pitch spring portion 51 and the third long-pitch spring portion 53 are identical in the present embodiment, and the parameters are: the diameter of the steel wire is 3.2cm, the outer diameter of the spring is 28.5cm, the inner diameter of the spring is 18cm, and the pitch is 15 mm; the remaining parameters of the second short-pitch spring portion 52 are the same as those of the first long-pitch spring portion 51 and the third long-pitch spring portion 53, with a pitch of 10 mm. Through the test of the inventor, the failure of the spring can be reduced to below 2% from original about 4%, and the service life of the long spring is prolonged.

In this embodiment, the installation rod 3 includes a rotating rod 31 connected to the output shaft of the driving unit 2 through a driving shaft 311, a fixing sleeve 33 connected to the fixing unit 4, and a screw rod 32 having an external thread 322 and having one end connected to the rotating rod 31 and the other end sleeved in the fixing sleeve 33 and screwed with an internal thread 331 provided on the inner wall of the fixing sleeve 33, a limiting plate 334 is installed at the connection port between the fixing sleeve 33 and the screw rod 32, a channel for the screw rod 32 to pass through is provided in the limiting plate 334, and a fixing nut 333 is installed on the limiting plate 334 to fix the limiting plate 334 at the socket of the fixing sleeve 33.

In this embodiment, the casing 1 includes a first fixed pipe 12 and a second fixed pipe 11 sleeved in the first fixed pipe 12 and having an end portion mounted with a sliding wheel 111 sliding in a sliding groove 121 formed in an inner wall of the first fixed pipe 12, the end portion of the sliding groove 121 is provided with a limiting groove 121a, a limiting post 123 is mounted in the groove, and the limiting post 123 is connected with a bottom surface of the limiting groove 121a through a jacking spring 121 b; a protrusion 123a having a circular cross section as a major arc is provided at an end of the stopper post 123, and the protrusion 123a is used to reduce resistance of the stopper post 123 against the slide wheel 111 when detached.

In this embodiment, the end of the screw rod 32 is provided with a connecting post 321 inserted into the rotating rod 31 for reinforcement connection, and the joint of the screw rod 32 and the rotating rod 31 is sleeved with the first fixing block 312 to prevent falling off, and the end of the fixing sleeve 33 is provided with the second fixing block 332 for reinforcement connection between the fixing sleeve 33 and the sleeve 1.

In this embodiment, the screw 32 is formed with an external thread 322 on the whole rod, the length of the fixing sleeve 33 is 5-10 cm longer than that of the screw 32, and the inner wall thereof is formed with an internal thread 331 adapted thereto and having the same length, the maximum connection length of the first fixing tube 12 and the second fixing tube 11 is equal to that of the rotating rod 31, the screw 32 and the fixing sleeve 33, and the length of the sliding groove 121 is 3-5 cm longer than that of the screw 32.

In this embodiment, the unexplained connection method may be selected from common methods such as welding, screwing, and the like, and is not described again.

The principle of the embodiment:

in an initial state, the maximum connection length is set between the first fixed pipe 12 and the second fixed pipe 11, the rotating rod 31, the screw rod 32 and the fixed sleeve 33, when the device works, the driving unit 2 drives the rotating rod 31 to rotate to drive the screw rod 32 to rotate in the fixed sleeve 33, the part of the screw rod 32 in the fixed sleeve 33 is increased, at this time, the whole spring is in a compressed state, wherein along with the compression, the number of turns of the second short-pitch spring part is pressed and increased until the driving unit 2 stops, the spring is compressed and stands still, at this time, the number of turns of the second short-pitch spring part 52 which is not easy to deform is almost pressed, and the compression degree of the first long-pitch spring part 51 and the third long-pitch spring part 53 which are easy to deform is moderate, so the attenuation is reduced, and the service life of the spring is prolonged; when the spring is expanded, the second short-pitch spring portion 52 of short pitch can be quickly returned to the initial state with little attenuation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a long spring of variable pitch car tail-gate, its characterized in that, including internally mounted have sleeve pipe (1) of spring (5), set up respectively in sleeve pipe (1) both ends and be used for the installation to fix with the mode that cup joints drive unit (2), the fixed unit (4) of installation pole (3) of spring (5), spring (5) including connect gradually with first long pitch spring portion (51), second short pitch spring portion (52) that drive unit (2) are connected and with third long pitch spring portion (53) that fixed unit (4) are connected.

2. The variable-pitch automobile tail door long spring is characterized in that the mounting rod (3) comprises a rotating rod (31) connected with an output shaft of the driving unit (2), a fixing sleeve (33) connected with the fixing unit (4), and a screw rod (32) with an external thread (322), wherein one end of the screw rod (31) is connected to one end of the output shaft of the driving unit (2), and the other end of the screw rod is sleeved in the fixing sleeve (33) and is in threaded connection with an internal thread (331) arranged on the inner wall of the fixing sleeve (33).

3. The variable-pitch automobile tail door long spring as claimed in claim 2, wherein a limit plate (334) used for fixing the screw rod (32) in the fixed sleeve (33) and provided with a channel for the screw rod (32) to pass through and a fixing nut (333) used for fixing the limit plate (334) are arranged at one end of the fixed sleeve (33) close to the screw rod (32).

4. The variable-pitch automobile tail gate long spring as claimed in claim 2, wherein the sleeve (1) comprises a first fixed pipe (12) and a second fixed pipe (11) which is sleeved in the first fixed pipe (12) and the end part of which is provided with a sliding wheel (111) sliding in a sliding groove (121) formed in the inner wall of the first fixed pipe (12).

5. The variable-pitch automobile tail door long spring is characterized in that a limiting groove (121 a) of a limiting column (123) which is internally installed and used for limiting the sliding wheel (111) is formed in the end portion, close to the second fixing pipe (11), of the sliding groove (121).

6. A variable pitch automobile tail gate length spring as claimed in claim 5, wherein a jacking spring (121 b) for jacking up the limiting column (123) is arranged in the limiting groove (121 a).

7. A variable pitch automobile tail gate length spring as claimed in claim 6, wherein the end of the limiting column (123) far away from the limiting groove (121 a) is provided with a bulge (123 a) with a section of a major arc arch.

8. The variable-pitch automobile tail gate long spring is characterized in that a first fixing block (312) arranged on the rotating rod (31) is sleeved at the joint of the screw rod (32) and the rotating rod (31).

9. A variable pitch motor tail gate length spring as claimed in claim 4, wherein the length of said fixing sleeve (33) is less than or equal to the length of said sliding groove (121).

10. A variable pitch automotive tailgate length spring according to claim 9, wherein the length of said screw (32) is less than or equal to the length of said retaining sleeve (33).