Spring preloading device

Abstract

The utility model provides a spring pre-installation device, including: a carrier with a bearing surface; a locking mechanism, including a positioning sleeve, a lock core and a clamping claw, the positioning sleeve protruding from the bearing surface and connected to the carrier; the clamping claw is distributed along the circumference of the positioning sleeve and is rotatably connected to the positioning sleeve; the lock core can drive the clamping claw to rotate so that the first end of the clamping claw rotates in the direction close to the carrier; a clamping mechanism is placed on one side of the carrier with the bearing surface, and is movably connected to the carrier along a first direction so that the clamping mechanism can move in the first direction in the direction close to the carrier; when the clamping mechanism moves in the first direction in the direction close to the carrier, it is used to compress the spring; after the spring is compressed, the lock core drives the clamping claw to rotate so that the first end of the clamping claw rotates in the direction close to the carrier and abuts against the first end of the spring to lock the spring. The spring pre-installation device provided by the utility model can improve the qualified rate and installation efficiency of the main position spring installation of the vacuum booster.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a spring pre-installing device. Background Art

[0002] In the automobile braking system, the vacuum booster is an extremely important component. The vacuum booster plays the role of amplifying force in the braking system. The output force generated by stepping on the brake pedal is amplified to generate the input force of the brake master cylinder. The master cylinder drives the brake oil to pump oil to the brake caliper, and the hydraulic oil pushes the piston to generate braking force. After the foot releases the brake pedal, the main return spring in the booster returns to its original state to help the pedal return. The quality of the installation of the main return spring affects the qualification rate of the product. If the main return spring is not installed properly, the input rod mechanism will not return to its position, and subsequent testing cannot be carried out. The existing main position spring installation efficiency and installation qualification rate are not good, so an effective device is needed to assist in the installation of the main return spring. Utility Model Content

[0003] In view of the problems in the prior art, the purpose of the utility model is to provide a spring pre-installation device, which makes the spring installation safe and effective, improves the spring installation efficiency, and solves the problems of difficult and inadequate spring installation.

[0004] The present invention provides a spring pre-installation device for compressing and locking a spring, comprising:

[0005] A carrier, including a carrier surface;

[0006] The locking mechanism comprises a positioning sleeve, a lock core and a clamping claw. The positioning sleeve protrudes from the bearing surface and is connected to the carrier to position the spring. The clamping claw is distributed along the circumference of the positioning sleeve and is rotatably connected to the positioning sleeve. The lock core can drive the clamping claw to rotate so that the first end of the clamping claw rotates toward the direction close to the carrier and the second end of the clamping claw rotates away from the carrier.

[0007] A clamping mechanism is disposed on a side of the platform where the carrying surface is provided, and is movably connected to the platform along a first direction, so that the clamping mechanism can move along the first direction toward or away from the platform; when the clamping mechanism moves along the first direction toward the direction close to the platform, the spring is compressed;

[0008] When the height of the spring is compressed to a height lower than the height of the first end of the clamp and the lock core drives the clamp to rotate, the first end of the clamp rotates toward the carrier and makes the first end of the clamp abut against the first end of the spring to lock the spring.

[0009] In these embodiments, the spring is compressed by a clamping mechanism, and the lock core of the locking mechanism drives the clamping claw to rotate to lock the spring, so that the spring remains in a compressed state. This method is simple in compressing and locking the spring and has high installation efficiency. It can improve the compression locking efficiency of the spring and improve the qualified rate of the spring pre-rotation, thus facilitating the smooth installation of the vacuum booster.

[0010] In some embodiments, the positioning sleeve and the clamp are rotatably connected via a pin shaft; the first end of the lock core protrudes from the first end of the positioning sleeve, and a rotating structure is provided at the first end of the lock core; when the clamp is in the first state, the first end of the clamp abuts against the rotating structure.

[0011] In these embodiments, the connection method between the positioning sleeve and the clamping claw is specifically shown, and the first end of the lock core is provided with a rotating structure so that the rotation of the lock core can drive the clamping claw to rotate toward the carrier.

[0012] In some embodiments, a limiting column is provided at the first end of the positioning sleeve to limit the rotation angle of the first end of the lock core.

[0013] In these embodiments, a limiting column is provided on the positioning sleeve to avoid excessive rotation of the rotating structural member.

[0014] In some embodiments, the lock core performs rotational motion around the first direction via a first driving member.

[0015] In these embodiments, a first driving member is provided to control the lock core to perform rotational movement around a first direction, so as to facilitate locking of the compression spring.

[0016] In some embodiments, the first driving member is a rotary cylinder including a rotary table connected to the second end of the lock core.

[0017] In these embodiments, it is specifically shown that the first driving member can be a rotary cylinder, which is connected to the lock core so as to automatically control the lock core to rotate around a first direction, thereby improving the efficiency of locking the spring.

[0018] In some embodiments, the clamping mechanism further includes a spring compression fixture and a second driving member, and the spring compression fixture is movably connected to the carrier along the first direction via the second driving member.

[0019] In these embodiments, structural components in the clamping mechanism are specifically shown, including a spring clamping mechanism and a second driving component that drives the spring clamping mechanism to move toward the carrier.

[0020] In some embodiments, the second driving member is any one of a linear cylinder, a linear motor or a lead screw.

[0021] In these embodiments, a driving device in the prior art that can drive the spring clamping mechanism to move along a first direction is shown, and the linear cylinder, linear motor and lead screw can all be automatically controlled to perform linear motion to improve the efficiency of the compression spring.

[0022] In some embodiments, the spring compression tooling includes a cylindrical structure, a first end of the cylindrical structure is connected to the second driving member, and the second end of the cylindrical structure is provided with an annular groove concave inward in a direction away from the carrier, and the annular groove is also circumferentially provided with notches equal to the number of the clamps.

[0023] In these embodiments, the specific structure of the spring compression tooling is shown, the annular groove at the second end of the spring tooling compression tooling is used to accommodate the first end of the spring when compressing the spring to limit the spring, and the notch on the annular groove is used to reserve a position for the clamping jaw to lock, so that the clamping jaw can lock the spring by resting on the spring position at the notch when locking.

[0024] In some embodiments, it also includes a support plate and a fixed block, wherein the support plate is provided with a support foot on one side close to the carrier, and the support foot is fixedly connected to the carrier; the first end of the fixed block is fixedly connected to the support plate, and the second end of the fixed block is connected to the rotating cylinder.

[0025] In these embodiments, the rotary cylinder is fixedly connected to the carrier through a support plate and a fixing block.

[0026] In some embodiments, a positioning column is provided at the first end of the fixing block, and a positioning hole matching with the positioning column is provided at the positioning sleeve.

[0027] In these embodiments, a positioning column is provided on the fixed block, a positioning hole is provided on the positioning sleeve, and the positioning column cooperates with the positioning hole to fix the positioning sleeve on the fixed block, so that the position of the clamping jaw on the fixed block is fixed, thereby preventing the notch on the spring compression tooling from not being able to correspond to the position of the clamping jaw when the tooling moves downward, thereby preventing the spring from being unable to be compressed and locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0029] Figure 1 is a schematic diagram of a spring preloading device according to an embodiment of the utility model;

[0030] Figure 2 It is a partial schematic diagram of the locking mechanism of the utility model;

[0031] Figure 3It is a schematic diagram of the connection between the locking mechanism and the rotating head of the utility model;

[0032] Figure 4 It is a schematic diagram of the connection between the support plate, the fixing block and the rotating cylinder of the utility model;

[0033] Figure 5 It is a schematic diagram of the spring pre-installation device of the utility model before locking the spring;

[0034] Figure 6 It is a schematic diagram of the spring pre-installing device of the utility model after locking the spring;

[0035] Figure 7 It is an enlarged view of the spring pre-installing device of the utility model when locking the spring;

[0036] Figure 8 This is a schematic diagram of the front and rear shells of the vacuum booster after installation;

[0037] Fig. 9 It is a schematic diagram of a perspective view of the front shell and the rear shell of the vacuum booster after being installed together.

[0038] Reference numerals:

[0039] 100 stage 310 spring compression tooling

[0040] 110 support plate 311 annular groove

[0041] 111 Support foot 312 Notch

[0042] 120 fixed block 320 second driving member

[0043] 121 Positioning column 330 Connection block

[0044] 210 Positioning sleeve 340 Support column

[0045] 211 Limit pin 350 Connecting plate

[0046] 220 lock cylinder 360 linear bearing

[0047] 221 rotating structure 370 movable plate

[0048] 230 jaws 400 spring

[0049] 240 Rotary Cylinder 500 Rear Shell

[0050] 241 Rotating head 600 Front shell DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0052] In order to solve the problems of low installation efficiency and low installation qualification rate of the main spring in the vacuum booster in the prior art, the utility model provides a spring pre-installation device. Figures 1 to 7 As shown, the spring preloading device includes a carrier 100, a locking mechanism and a pressing mechanism.

[0053] Specifically, Figures 1 to 3 As shown, the carrier 100 includes a bearing surface; the locking mechanism includes a positioning sleeve 210, a lock core 220 and a clamp 230; wherein the positioning sleeve 210 protrudes from the bearing surface and is fixedly connected to the carrier 100; the clamp 230 is distributed along the circumference of the positioning sleeve 210 and is rotatably connected to the positioning sleeve 210; the lock core 220 can drive the clamp 230 to rotate, so that the first end of the clamp 230 moves in a direction close to the carrier 100, and the second end of the clamp 230 moves in a direction away from the carrier 100.

[0054] Before explaining the principle of the locking mechanism, the composition of the vacuum booster is introduced first. Figure 8 and Fig. 9 The vacuum booster includes a vacuum booster housing composed of a front shell 600 and a rear shell 500. The first end of the spring 400 abuts against the rear shell 500, and the second end of the spring 400 abuts against a brake rod (not shown in the figure). The movement of the brake rod can drive the compression and recovery of the spring 400. Therefore, when pre-installing the spring of the vacuum booster, it is necessary to sequentially sleeve the rear shell 500 and the spring 400 on the outside of the positioning sleeve 210 so that the first end of the spring 400 abuts against the side wall of the rear shell 500.

[0055] Next, we will introduce the locking mechanism. Figure 5 As shown, before compressing and locking the spring 400, the rear shell 500 is first sleeved on the outside of the positioning sleeve 210, and then the spring 400 is sleeved on the outside of the positioning sleeve 210. The second end of the spring 400 abuts against the side wall of the rear shell 500. The positioning sleeve 210 is used to position the spring 400 to avoid positional displacement of the spring 400 when compressing and locking the spring 400, causing installation failure.

[0056] For further information, please continue to refer to Figure 2 and Figure 3In this embodiment, the positioning sleeve 210 and the clamping jaw 230 are rotatably connected via a pin; the first end of the lock core 220 protrudes from the first end of the positioning sleeve 210, and the first end of the lock core 220 is provided with a rotating structure 221. When the clamping jaw 230 is in the first state, the first end of the clamping jaw 230 abuts against the rotating structure 221. Here, the first state refers to the clamping jaw 230 being in a released state, that is, an unlocked state. In this embodiment, the rotating structure 221 can be a triangular prism. In other embodiments, the rotating structure 221 can also be a multi-prism body such as a quadrangular prism or a pentagonal prism. The utility model does not limit the specific shape of the rotating structure 221.

[0057] Furthermore, if Figure 2 As shown, a limiting pin 211 is provided on the positioning sleeve 210 to limit the rotation angle of the rotating structure 221 to prevent the rotating structure 221 from over-rotating.

[0058] Furthermore, the lock core 220 rotates around a first direction through the first driving member. Here, the first direction is the up and down direction when viewed from the paper. Figure 3 and Figure 4 As shown, the first driving member can be a rotary cylinder 240, including a rotary table, on which a rotary head 241 is provided, and the rotary table is connected to the second end of the lock core 220 through the rotary head 241. Therefore, when the rotary table of the rotary cylinder 240 performs a rotary motion, the rotary head 241 can be driven to perform a rotary motion, and the rotary head 241 further drives the lock core 220 to perform a rotary motion. However, the first driving member includes but is not limited to a rotary cylinder, and can also be other rotary mechanisms. The rotary cylinder 240 can be automatically controlled to perform a rotary motion, which can improve the efficiency of the locking spring 400.

[0059] like Figure 1 and Figure 7 As shown, the clamping mechanism is placed on one side of the carrier 100 where the bearing surface is set, and is movably connected to the carrier 100 along the first direction, so that the clamping mechanism can move along the first direction toward or away from the carrier 100; when the clamping mechanism moves along the first direction toward the carrier 100, the two ends of the spring 400 are restricted between the clamping mechanism and the locking mechanism, and as the clamping mechanism gets closer and closer to the spring 400, it can be used to compress the spring 400; when the height of the spring 400 is compressed to a height lower than the first end of the clamping jaw 230, the lock core 220 is driven to rotate around the first direction, and the lock core 220 drives the clamping jaw 230 to rotate around the first direction, and the first end of the clamping jaw 230 rotates toward the carrier 100, and when the first end of the clamping jaw 230 abuts against the top of the spring 400, the compressed spring 400 can be locked.

[0060] For details, please continue to refer to Figure 1 and Figure 7The clamping mechanism includes a spring compression fixture 310 and a second driving member 320. The spring compression fixture 310 is movably connected to the carrier 100 along the first direction through the second driving member 320. The second driving member 320 can be any one of a linear cylinder, a linear motor or a screw in the prior art. The linear cylinder, the linear motor or the screw can be automatically controlled to perform linear motion, thereby improving the efficiency of the compression spring 400.

[0061] like Figure 1 As shown, the clamping mechanism further includes a fixing bracket for fixing the second driving member 320. The fixing bracket includes two supporting columns 340 and a connecting plate 350 connecting the two supporting columns 340.

[0062] The clamping mechanism also includes a movable plate 370, which is fixedly connected to the spring compression fixture 310, and the movable plate 370 is slidably connected to the support column 340 through a linear bearing 360. The movable plate 370 moves up and down following the spring compression fixture 310. The linear bearing 360 plays a supporting and positioning role, so that the movable plate 370 and the spring compression fixture 310 can operate smoothly and efficiently.

[0063] like Figure 1 and Figure 4 As shown, the device also includes a support plate 110 and a fixed block 120. A support foot 111 is provided on the side of the support plate 110 close to the carrier 100, and the support foot 111 is fixedly connected to the carrier 100; the first end of the fixed block 120 is fixedly connected to the support plate 110, and the second end of the fixed block 120 is connected to the rotating cylinder 240, and the rotating cylinder 240 is fixedly connected to the carrier 100 through the fixed block 120.

[0064] like Figure 6 As shown, the spring compression fixture 310 includes a columnar structure, the first end of the columnar structure is connected to the second driving member 320 through a connecting block 330, the second end of the columnar structure is provided with an annular groove 311 which is concave in the direction away from the carrier 100, and the annular groove 311 is also arranged with the same number of notches 312 as the clamping jaws 230 in the circumference. The spring compression fixture 310 moves toward the carrier 100 through the second driving member, when the annular groove 311 of the spring compression fixture 310 compresses the spring 400 to position, the clamping jaw 230 is exposed at the notch 312, when the spring compression fixture 310 compresses the height of the spring 400 to a height lower than the highest end of the clamping jaw 230, and the locking mechanism drives the clamping jaw 230 to rotate toward the carrier 100 to abut against the first end of the spring 400, the spring 400 (as shown in FIG. 1 ) is locked. Figure 6 and Figure 7 shown).

[0065] like Figure 4As shown, the first end of the fixed block 120 is provided with a positioning column 121, and the positioning sleeve 210 is provided with a positioning hole (not shown in the figure) that matches the positioning column 121. By providing the positioning column 121 on the fixed block 120 and the positioning hole on the positioning sleeve 210, the positioning column 121 matches the positioning hole to fix the positioning sleeve 210 on the fixed block 120, so that the position of the clamping jaw 230 on the fixed block 120 is fixed. When the spring compression tool 310 moves downward, the notch on it cannot correspond to the position of the clamping jaw 230, and the spring 400 cannot be compressed and locked.

[0066] After the spring 400 is locked between the rear housing 500 and the clamping jaw 230 using the spring preloading device, please refer to Figure 8 and Fig. 9 The subsequent workstation rivets the rear shell 500 and the front shell 600 together, and then uses the unlocking tool to drive the lock core 220 to rotate the unlocking claw 230, so that the claw returns to the position as shown in the figure. Figure 2 , Figure 3 and Figure 5 The first end of the unlocked clamp 230 is retracted (rotated in the direction away from the carrier 100), and the spring 400 is released, with the first end and the second end respectively resting against the front shell 600 and the rear shell 500, thereby completing the assembly of the main return spring.

[0067] The spring pre-installation device provided by the utility model has the following advantages:

[0068] The spring is compressed by the clamping mechanism, and the lock core of the locking mechanism drives the clamping claw to rotate to lock the spring, so that the spring remains in a compressed state. This method is simple to compress and lock the spring, has high installation efficiency, can improve the compression locking efficiency of the spring, improve the qualified rate of the spring pre-rotation, and provide convenience for the smooth installation of the vacuum booster.

[0069] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A spring preloading device, characterized in that: For compressing and locking springs, including: A carrier, including a carrier surface; The locking mechanism comprises a positioning sleeve, a lock core and a clamping claw. The positioning sleeve protrudes from the bearing surface and is connected to the carrier to position the spring. The clamping claw is distributed along the circumference of the positioning sleeve and is rotatably connected to the positioning sleeve. The lock core can drive the clamping claw to rotate so that the first end of the clamping claw rotates toward the direction close to the carrier and the second end of the clamping claw rotates away from the carrier. A clamping mechanism is disposed on a side of the platform where the carrying surface is provided, and is movably connected to the platform along a first direction, so that the clamping mechanism can move along the first direction toward or away from the platform; when the clamping mechanism moves along the first direction toward the direction close to the platform, the spring is compressed; When the height of the spring is compressed to a height lower than the height of the first end of the clamp and the lock core drives the clamp to rotate, the first end of the clamp rotates toward the carrier and makes the first end of the clamp abut against the first end of the spring to lock the spring.

2. The spring preloading device according to claim 1, characterized in that: The positioning sleeve is rotatably connected to the clamping jaw via a pin shaft; the first end of the lock core protrudes from the first end of the positioning sleeve, and a rotating structural component is provided at the first end of the lock core; when the clamping jaw is in the first state, the first end of the clamping jaw abuts against the rotating structural component.

3. The spring preloading device according to claim 2, characterized in that: A limiting column is provided at the first end of the positioning sleeve to limit the rotation angle of the first end of the lock core.

4. The spring preloading device according to claim 3, characterized in that: The lock core performs rotational motion around the first direction through a first driving member.

5. The spring preloading device according to claim 4, characterized in that: The first driving member is a rotary cylinder, comprising a rotary table, and the rotary table is connected to the second end of the lock core.

6. The spring preloading device according to claim 1, characterized in that: The clamping mechanism further includes a spring compression fixture and a second driving member, and the spring compression fixture is movably connected to the carrier along the first direction via the second driving member.

7. The spring preloading device according to claim 6, characterized in that: The second driving member is any one of a linear cylinder, a linear motor or a lead screw.

8. The spring preloading device according to claim 7, characterized in that: The spring compression tooling includes a columnar structure, a first end of which is connected to the second driving member, a second end of which is provided with an annular groove concave inwardly away from the carrier, and a circumference of the annular groove is also provided with notches equal to the number of the clamps.

9. The spring preloading device according to claim 5, characterized in that: It also includes a support plate and a fixed block. The support plate is provided with a support foot on one side close to the carrier, and the support foot is fixedly connected to the carrier. The first end of the fixed block is fixedly connected to the support plate, and the second end of the fixed block is connected to the rotating cylinder.

10. The spring preloading device according to claim 9, characterized in that: A positioning column is provided at the first end of the fixing block, and a positioning hole is provided at the positioning sleeve to be matched and connected with the positioning column.

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