CN108747979A - A kind of spring-compressed mechanism and a kind of pressure mounting of the spring equipment - Google Patents

Abstract

A kind of spring-compressed mechanism and a kind of pressure mounting of the spring equipment, wherein spring-compressed mechanism include：Pedestal；Limiting device on pedestal and spring compression means；The limiting device at least limits an axial end portion of spring；The spring compression means include spring terminal casting die, compression unit and compression driven unit, the spring terminal casting die is movably installed on the compression unit, the spring terminal casting die is movable to be moved to position corresponding with another axial end portion of spring, and the compression driven unit drives the compression unit that the spring terminal casting die is driven to be compressed axially the spring along spring.

Description

A spring compression mechanism and a spring pressing device

technical field

The invention relates to the technical field of spring assembly, in particular to a spring compression mechanism and a spring pressing device.

Background technique

The switch is one of the commonly used accessories on equipment and instruments, and the demand is very large. The push switch is generally composed of a shell, a button, a return spring, a fixed contact and a movable contact. When in use, press the button to drive or squeeze The movable contact makes it contact with the fixed contact to realize energization, and at the same time the return spring is compressed, and when reset, it is reset under the action of the spring, and the movable contact is separated from the fixed contact to realize power off.

In the production process of the push switch, many parts need to be installed manually, which has low efficiency, high labor cost, and high scrap rate. Therefore, in the prior art, in order to realize the automatic assembly and production of the switch, many enterprises have carried out The research and development of automation equipment has been promoted, and the mass production line assembly of the production line has been realized. However, in the assembly process of the switch, the installation of the spring is the most difficult to realize automatic assembly. For the installation of the spring in the natural state (that is, the uncompressed or stretched spring) with the exposed end, the adsorption installation is generally used in the prior art. , that is, vacuum or magnetic force is used to absorb the fixed end of the spring in the mounting seat to be installed, but for installing a spring in a compressed state, or installing a spring with both ends that need to be clamped into the housing, it is difficult to realize the installation automation and the whole process For mechanical operations, the spring still needs to be manually compressed and assembled in the housing.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the defects of low automation of spring pressing in the prior art, thereby providing a spring compression mechanism capable of automatic operation and mechanical operation for spring pressing and a spring pressing equipment .

For this reason, technical scheme of the present invention is as follows:

A spring compression mechanism comprising:

base;

A limit device and a spring compression device on the base;

The limiting device limits at least one axial end of the spring;

The spring compression device includes a spring end pressure piece, a compression unit and a compression drive unit, the spring end pressure piece is movably mounted on the compression unit, and the spring end pressure piece can move to the other axial direction of the spring At the position corresponding to the end, the compression drive unit drives the compression unit to drive the spring end pressing piece to compress the spring along the spring axis.

Further, the limiting device includes an axial limiting unit and a radial limiting unit, wherein the axial limiting unit limits the axial end of the spring, and the radial limiting unit extends axially along the spring The radial limit is limited, and the radial limit unit ensures that the spring shrinks linearly in the axial direction when compressed.

Further, the radial limiting unit is a guide plate that abuts against the outer peripheral surface of the spring, and the plane where the guide plate is located is arranged along the radial direction of the spring; Slot through which the guide plate passes.

Further, one end of the spring is installed in the mounting seat, and the limiting device further includes an outer peripheral limiting unit for locking the outer peripheral wall of the installing seat, and the outer peripheral limiting unit is arranged on the axial limiting unit and the radial limiting unit.

Further, the axial limiting unit is a limiting plate, the outer peripheral limiting unit is a plurality of claws arranged on a limiting block and engaged with the outer peripheral wall of the mounting seat, and the limiting block is fixedly connected to To the limit plate, the guide plate is axially arranged at the end of the limit block.

Further, the limit device further includes a limit drive unit and a limit guide unit, the limit drive unit is connected to the limit plate and drives the limit plate to drive the limit block in the locked position and open The position is moved between positions, and the limit guide unit guides the movement.

Further, the compression unit is provided with a guide groove that allows the spring end pressure piece to slide through, and the spring end pressure piece is driven by the pressure piece drive unit to move between the compression position and the original position, and is located at the compression position At this time, the spring end pressure piece corresponds to the axial end of the spring.

Further, the compression unit is also provided with a compression drive unit and a compression guide unit, the compression drive unit is connected to the compression unit and drives the compression unit to perform compression movement, and the compression guide unit moves along the spring axis The compressing movement of the compressing unit is guided towards a setting.

Further, the compression driving unit is connected to the compression unit through a steering member, the steering member includes a wedge at the end of the compression unit and a driving roller at the movable end of the compression driving unit, the The drive roller abuts against the slope of the wedge.

A spring pressing device comprising:

A spring compression mechanism as claimed in any one of the preceding claims;

And a moving mechanism connected with the spring compression mechanism, the moving mechanism at least drives the spring compression mechanism to move to the working position or the installation position; when in the working position, the spring compression mechanism performs a compression operation, and is located at the When the above installation position is reached, the spring compression mechanism installs the compressed spring assembly into the pre-installation part.

Further, the spring assembly includes the spring and a spring mounting seat.

The technical solution of the present invention has the following advantages:

1. The spring compression mechanism provided by the present invention comprises: a base; a position limiting device and a spring compression device arranged on the base; the position limiting device at least limits an axial end of the spring; the spring compression device comprises a spring End pressure piece, compression unit and compression drive unit, the spring end pressure piece is movably installed on the compression unit, the spring end pressure piece can move to a position corresponding to the other axial end of the spring, and the compression drive unit drives the compression unit The spring end pressing piece is driven to compress the spring along the spring axis. By setting the limit device to limit the end of the spring, the compression device and the limit device are used to compress along the axial direction of the spring, which can quickly and conveniently compress and assemble the spring components, save manpower, reduce costs, and improve production line efficiency.

2. In the spring compression mechanism provided by the present invention, the limiting device includes an axial limiting unit and a radial limiting unit, wherein the axial limiting unit limits the axial end of the spring, and the radial limiting unit moves along the direction of the spring. The axial arrangement limits its radial direction, and the radial limit unit ensures that the spring shrinks linearly in the axial direction when compressed. Since the spring does not have a fixed shape after being pressed, and it is easy to twist or bend during the stress process, the axial and radial directions of the spring are limited at the same time by setting an axial limit unit and a radial limit unit. position, prevent the spring from twisting during compression, and improve the qualified rate of the product.

3. In the spring compression mechanism provided by the present invention, the radial limit unit is a guide plate abutting against the outer peripheral surface of the spring, and the plane where the guide plate is located is arranged radially along the spring; slotting. By arranging the guide plate and the groove that matches the guide plate on the compression unit, it is ensured that the spring is guided and limited by the guide plate during the compression process, further avoiding the twisting or bending of the spring during the compression process, and further Improve the pass rate of the product.

4. In the spring compression mechanism provided by the present invention, one end of the spring is installed in the mounting seat, and the limiting device also includes a peripheral limiting unit for locking the peripheral wall of the mounting seat, and the peripheral limiting unit is arranged between the axial limiting unit and the Between radial limit units. The axial limiting unit is a limiting plate, the outer peripheral limiting unit is a plurality of claws arranged on a limiting block and connected to the outer peripheral wall of the mounting seat, the limiting block is fixedly connected to the limiting plate, and the guide plate is axially Set at the end of the limit block. The mounting seat of the spring component is limited by setting the axial and peripheral limit units, so as to avoid the displacement of the spring component under the action of external force during the compression process, thereby affecting the compression effect, and further improving the qualified rate of the product.

5. In the spring compression mechanism provided by the present invention, the compression unit is provided with a chute that allows the spring end pressure piece to slide through, and the spring end pressure piece is driven by the pressure piece drive unit to move between the compressed position and the original position. , the spring end pressure piece corresponds to the axial end of the spring. By setting the guide groove on the compression unit for the movement of the moving spring end pressure piece, it is allowed to move the spring end pressure piece to the free end of the spring to limit it before performing the compression operation, and then the compression unit drives the spring end pressure piece to perform together Compression operation, through positioning first and then compressing, further ensures the accuracy of the spring compression process and improves the qualified rate of products.

6. The spring pressing equipment provided by the present invention, by setting the above-mentioned spring compression mechanism and moving mechanism, adopts the moving mechanism to control the spring compression mechanism to move between the initial position, the working position and the installation position, and the spring compression mechanism can be realized by setting the moving mechanism The compression operation is performed at the compression position, and after the compression is completed, it is moved to the installation position to perform the installation operation, which realizes the automation rate of the whole mechanical operation of spring pressing and improves the production efficiency of the production line.

7. The spring pressing device provided by the present invention must have the advantages of the above-mentioned spring compression mechanism because it includes the above-mentioned spring compression mechanism.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is the structural representation of spring pressing device of the present invention;

Fig. 2 is a schematic structural view of the spring compression mechanism shown in Fig. 1;

Fig. 3 is a front view of the spring compression mechanism shown in Fig. 2;

Fig. 4 is a schematic diagram of the assembly of the compression device and the base in Fig. 2;

Fig. 5 is a schematic diagram of the assembly of the compression unit and the spring end pressure piece shown in Fig. 4;

Fig. 6 is a schematic diagram of the assembly of the limiting device and the base in Fig. 2;

Fig. 7 is a structural schematic diagram of a limiting device;

FIG. 8 is an enlarged schematic view of the limiting block in FIG. 7 .

Explanation of reference signs:

1-spring compression mechanism; 11-base;

2- mobile mechanism;

3-spring assembly; 31-spring; 32-installation seat;

4-limiting device; 41-guiding plate; 42-limiting plate; 43-limiting block; 431-claw; 44-limiting cylinder; 45-sliding rod; 46-guiding block; ;

5-spring compression device; 51-spring end pressure piece; 511-briquetting block; 512-briquetting block cylinder; 513-pressing claw; 514-mounting seat; - chute; 54 - slider; 55 - compression drive unit; 56 - wedge; 57 - roller.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example

As shown in Figure 1, the present invention describes a spring pressing device, the spring pressing device in this embodiment includes a spring compression mechanism 1 and a moving mechanism 2; wherein the moving mechanism 2 is connected with the compression mechanism 1 to drive the compression mechanism 1 Move between standby position, working position and installation position. The standby position refers to the non-working position of the compression mechanism 1 when no spring assembly is detected under the device; the working position refers to the position where the moving mechanism 2 moves the spring compression mechanism 1 to perform the compression operation when a spring assembly is detected below the device The installation position means that the moving mechanism 2 moves the spring compression mechanism 1 to the corresponding position above the pre-installation part. At this position, the spring compression mechanism 1 installs the compressed spring assembly 3 into the pre-installation part. The spring assembly 3 includes a spring 31 and a spring mounting seat 32 , and one end of the spring 31 is fixed in the mounting seat 32 . The invention realizes the automation rate of the whole mechanical operation of the spring press fitting by setting the moving mechanism to control the movement of the spring compression mechanism between the standby position, the working position and the installation position, and improves the production efficiency of the production line.

As shown in Figure 2, the spring compression mechanism 1 in this embodiment includes a base 11, a limiting device 4 and a spring compression device 5, wherein the limiting device 4 and the spring compression device 5 are all installed on the base 11, and the limiting The device 4 limits at least one end of the spring, and the spring compression device 5 is used to compress the spring along the spring axis.

As shown in FIGS. 2-3 , the limiting device 4 simultaneously limits the spring mounting seat 32 and the spring 31 with one end installed in the spring mounting seat 32 . Wherein the limiting device 4 includes an axial limiting unit, a radial limiting unit and a peripheral limiting unit, wherein the axial limiting unit limits the axial end of the spring, and the radial limiting unit extends axially along the spring It is limited in the radial direction, and the radial limit unit ensures that the spring shrinks linearly in the axial direction when compressed. The outer peripheral limiting unit locks the outer peripheral wall of the mounting seat 32 , and the outer peripheral limiting unit is arranged between the axial limiting unit and the radial limiting unit. Since the spring does not have a fixed shape after being pressed, and it is easy to twist or bend during the process of being stressed, the present invention simultaneously controls the axial and radial directions of the spring by setting an axial limiting unit and a radial limiting unit. The position is limited to prevent the spring from twisting during the compression process, which improves the qualified rate of the product.

As shown in Figures 3 and 7, the axial limiting unit in this embodiment is an end limiting plate 42, see Figures 6-8, the outer peripheral limiting unit is a limiting block 43 as shown in Figure 8 Several claws 431 on the outer peripheral wall of the mounting seat are clamped, the limiting block 43 is fixedly connected to the limiting plate 42 , and the guide plate 41 is axially arranged at the end of the limiting block 43 . Wherein the end limiting plate 42 is a plate body that can be lifted and moved vertically, and the end limiting plate 42 abuts against the right side end of the spring mounting seat 32 through vertical movement, thus realizing the spring mounting seat 32 Axial limit. At the same time, a limiting block 43 is also fixed on the end limiting plate 42 , and the limiting block 43 can be raised and lowered together with the end limiting plate 42 . As shown in Figures 7-8, a pair of claws 431 extend downward from the bottom of the limiting block 43. When the limiting block 43 is lowered to the locked position together with the end limiting plate 42, the pair of claws will 431 just abuts against the outer peripheral surface of the spring mounting seat 32 , thereby realizing the outer peripheral limit of the spring mounting seat 32 . The mounting seat of the spring component is limited by setting the axial and peripheral limit units, so as to avoid the displacement of the spring component under the action of external force during the compression process, thereby affecting the compression effect, and further improving the qualified rate of the product.

The radial limiting unit in this embodiment is a guide plate 41 abutting against the outer peripheral surface of the spring, and the plane where the guide plate 41 is located is arranged radially along the spring; as shown in Figure 7, the guide plate 41 is vertically arranged, and its One end is fixed to the end of the limiting block 43 , and the other end extends along the horizontal direction. The guide plate 41 abuts against the outer circumferential surface of the spring 31 and is vertically disposed on a plane along the radial direction of the spring. As shown in Figure 4, by setting the guide plate 41 and the groove 516 matched with the guide plate 41 on the compression unit, it is ensured that the guide plate 41 still guides and limits the spring during the compression process, further Avoiding twisting or bending of the spring during the compression process further improves the pass rate of the product.

The limit device also includes a limit drive unit and a limit guide unit. The limit drive unit is connected to the limit plate 42 and drives the limit plate 42 to drive the limit block 43 to move vertically between the locked position and the open position. A bit guiding unit guides this vertical movement. Wherein referring to accompanying drawing 6, the limit drive unit in the present embodiment is the limit cylinder 44 that is arranged on the end of the limit device, and the guide unit is a slider slider mechanism connected with the output end of the limit cylinder 44. Referring to FIG. 7 , one end of the end limiting plate 42 is fixedly connected to the slide bar 45 , the slide bar 45 is vertically slidably disposed in the guide block 46 , and the guide block 46 is fixed on the base 11 through the guide block mounting seat 47 . The other end of the slide bar 45 is driven by the limit cylinder 44, and the movement of the limit cylinder 44 drives the slide bar 45 to slide vertically along the guide block 46, thereby realizing the lifting movement of the limit device.

The spring compression mechanism of the present invention sets a limit device to limit the end of the spring, and the compression device cooperates with the limit device to compress along the axial direction of the spring, which can quickly and conveniently compress the spring assembly, save manpower, reduce costs, and increase production. line efficiency.

As shown in Figures 4-5, the spring compression device in this embodiment includes a spring end pressure piece 51, a compression unit 52 and a compression drive unit 53, the spring end pressure piece 51 is movably installed on the compression unit 52, and the spring end pressure piece 51 The compression unit 52 is arranged corresponding to the axial end of the spring 53 and driven by the compression driving unit 53 to move along the spring axis to compress the spring 53 . In order to prevent the spring end pressure piece from interfering with the guide plate 41 during movement, the spring end pressure piece 51 is also provided with a slot 516 allowing the guide plate 41 to pass through. Referring to accompanying drawing 5, by setting the guide groove 515 on the compression unit 52 for the movement of the moving spring end pressure piece, the spring end pressure is allowed before performing the compression operation, and the spring end pressure 51 first moves to the free end of the spring to limit it, and then is compressed The unit 52 drives the spring end pressing piece 51 to jointly perform the compression operation, and further ensures the accuracy of the spring compression process by positioning first and then compressing, thereby improving the qualified rate of the product.

Wherein as shown in Fig. 4-5, the spring end pressure piece 51 in the present embodiment comprises the pressure block 511 that can move up and down and the pressure piece drive unit, the pressure piece drive unit is to drive the pressure piece 511 to move and is arranged at its end. A briquetting cylinder 512, the briquetting cylinder 512 drives the briquetting 511 to move up and down vertically. The compression unit 52 is provided with a mounting seat 514 for mounting the pressing block cylinder 512 and a guide groove 515 allowing the pressing block 511 to pass through and slide therein. The pressing block 511 is driven by the pressing block cylinder 512 to move between the compressed position and the original position. When in the compressed position, the end of the pressing block 511 corresponds to the axial end of the spring 31 . As shown in Figure 4, the pressing block 511 is provided with slots along the axial direction of the spring to allow at least part of the guide plate 41 to pass through. There are two pressing claws 513, and a slot 516 is formed between the two pressing claws 513, and the spring 31 is squeezed by pressing the two pressing claws 513 against the axial ends of the spring 31 respectively.

The compression unit 52 is also provided with a compression drive unit and a compression guide unit. The compression drive unit is connected to the compression unit 52 and drives the compression unit to perform compression movement. The compression guide unit is arranged along the spring axis to guide the compression movement of the compression unit. As shown in Figures 3 and 5, the compression unit 52 in this embodiment is a sliding block with a wedge-shaped end that is slidably arranged on the base 11, and the compression guide unit is a horizontally arranged slider that connects the compression unit 52 and the base 11. block slide mechanism. As shown in Figure 5, the compression unit 52 is also provided with a chute 53 slidably connected with the base 11, the chute 53 cooperates with the slider 54 on the base 11, wherein the chute 53 and the slider 54 are all along the horizontal Orientation settings. As shown in Figure 3, the compression driving unit 55 is connected with the compression unit 52 through a steering piece, and the steering piece includes a wedge 56 positioned at the end of the compression unit and a roller 57 located at the movable end of the compression driving unit 55, and the roller 57 resists Connected to the slope of the wedge 56. The roller 57 is driven to move by the compression driving unit 55. When the compression driving unit 55 drives the roller 57 to move downward, it pushes the wedge 56 that abuts against it to move to the right, thereby driving the entire compression unit 52 to the right along the slider 54 as a whole. movement; on the contrary, when the compression drive unit 55 drives the roller 57 to move upward, the wedge 56 is pushed to return to the left under the drive of the return spring inside it, thereby driving the entire compression unit 52 to move leftward along the slider 54 as a whole. Wherein, since the spring end pressing member 51 is mounted on the compression unit 52, when the compression driving unit 55 drives the roller 57 to move, the spring end pressing member 51 moves together with the compression unit 52, thereby realizing the compression of the spring. The compression driving unit 55 in this embodiment is an air cylinder.

The working principle of the spring pressing equipment of the present invention is:

When the spring assembly is not detected on the production line, the spring compression mechanism is in the standby position. After the spring assembly is detected on the production line, the moving mechanism starts to move, and the spring compression mechanism is moved to the working position, and then the spring pressing operation is performed.

The spring press operation consists of the following steps:

First, perform the limiting operation: specifically, the limiting cylinder 44 drives the limiting plate 42 to move downward, thereby driving the limiting plate 42 and the limiting block 43 to move downward together. When the limiting device moves to the locking position, At this time, the limit plate 43 just presses against the right side end of the spring mounting seat 32, and the claw 431 at the lower end of the limiting block 43 is just clamped on the shell of the spring mounting seat 32, thereby locking and positioning the mounting seat 32; At the same time, the guide plate 41 disposed on the limiting block 42 presses against the outer peripheral surface of the spring. Thus, the limiting device moves into place.

Then, limit the free end of the spring: the pressure piece at the end of the spring starts to move, and the pressing block 511 moves downward to the compression position under the drive of the pressing block cylinder 512, and the pressing claw 513 on the pressing block 511 just corresponds to the axis of the spring Towards the free end, at this time the pressing claw 513 can abut against the end of the spring.

Finally, the compression operation is performed: when the spring end pressure piece moves to the compression position, the compression unit is driven by the compression drive unit 55, and at this time the output end of the compression drive unit 55 moves downward, passing through the wedge and the roller on the top of the compression unit 52 The cooperation of the compression unit 52 and the spring end pressure piece 51 are driven to move rightward as a whole to perform the spring compression operation. At this time, since the pressure block 511 is provided with a slot 516 that allows the guide plate 41 to pass through, during the compression process, the guide plate 41 is aligned. The radial side of the spring is guided to prevent the spring from twisting or bending during compression.

After the spring is compressed by the compression mechanism, the spring compression mechanism 1 is moved to the installation position by the moving mechanism 2 and the compressed spring assembly is placed into the pre-installation housing through the spring compression mechanism, so far the installation of one spring assembly is completed.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (11)

1. A spring compression mechanism, characterized in that it comprises: base; A limit device and a spring compression device on the base; The limiting device limits at least one axial end of the spring; The spring compression device includes a spring end pressure piece, a compression unit and a compression drive unit, the spring end pressure piece is movably mounted on the compression unit, and the spring end pressure piece can move to the other axial direction of the spring At the position corresponding to the end, the compression drive unit drives the compression unit to drive the spring end pressing piece to compress the spring along the spring axis. 2. The spring compression mechanism according to claim 1, wherein the limiting device comprises an axial limiting unit and a radial limiting unit, wherein the axial limiting unit limits the axial end of the spring. The radial limit unit extends along the axial direction of the spring to limit its radial direction, and the radial limit unit ensures that the spring shrinks linearly in the axial direction when compressed. 3. The spring compression mechanism according to claim 1 or 2, wherein the radial limiting unit is a guide plate that abuts against the outer peripheral surface of the spring, and the plane where the guide plate is located is along the diameter of the spring. Arranged in the direction; the spring end pressure piece is also provided with a slot allowing the guide plate to pass through. 4. The spring compression mechanism according to any one of claims 1-3, characterized in that: one end of the spring is installed in the mounting seat, and the limiting device also includes an outer peripheral wall for locking the outer peripheral wall of the mounting seat. A limiting unit, the outer peripheral limiting unit is arranged between the axial limiting unit and the radial limiting unit. 5. The spring compression mechanism according to claim 4, characterized in that: the axial limiting unit is a limiting plate, and the outer peripheral limiting unit is a plurality of clips mounted on a limiting block The claws on the outer peripheral wall of the seat, the limiting block is fixedly connected to the limiting plate, and the guide plate is axially arranged at the end of the limiting block. 6. The spring compression mechanism according to any one of claims 1-5, wherein the limiting device further comprises a limiting driving unit and a limiting guiding unit, and the limiting driving unit is connected to the limiting The position plate drives the limit plate to drive the limit block to move between the locking position and the open position, and the limit guide unit guides the movement. 7. The spring compression mechanism according to claim 6, characterized in that: the compression unit is provided with a guide groove allowing the spring end pressure piece to slide through, and the spring end pressure piece is driven by the pressure piece driving unit A compressed position in which the spring end retainer corresponds to an axial end of the spring moves between a compressed position and an original position. 8. The spring compression mechanism according to any one of claims 1-7, characterized in that: a compression drive unit and a compression guide unit are connected to the compression unit, the compression drive unit is connected to the compression unit and The compression unit is driven to perform a compression movement, and the compression guide unit is arranged axially along the spring to guide the compression movement of the compression unit. 9. The spring compression mechanism according to claim 8, characterized in that: the compression drive unit is connected to the compression unit through a steering piece, and the steering piece includes a wedge at the end of the compression unit and a The driving roller at the movable end of the compression driving unit is abutted against the inclined surface of the wedge. 10. A spring pressing device, characterized in that it comprises: The spring compression mechanism according to any one of claims 1-9; And a moving mechanism connected with the spring compression mechanism, the moving mechanism at least drives the spring compression mechanism to move to the working position or the installation position; when in the working position, the spring compression mechanism performs a compression operation, located in the In the installation position, the spring compression mechanism moves and installs the compressed spring assembly into the pre-installation part. 11. The spring pressing device according to claim 10, wherein the spring assembly comprises the spring and a spring mounting seat.