A closing device and method for a through-type vacuum booster with a front bag and a pre-cut rear port

Abstract

The application relates to a through-type front-pack rear-pre-cut opening vacuum booster closing device and method, and belongs to the manufacturing field of automobile boosters. The closing tool compresses the rear shell of the vacuum booster through a positioning ring, two half-holders are combined to form a circular positioning ring, and a gap fit positioning relationship is formed between the circular positioning ring and the front shell of the vacuum booster, the guide sleeve is screwed with the guide rod of the vacuum booster and is inverted on the accompanying clamp, and the guide sleeve is positioned on the positioning hole of the accompanying clamp to form a positioning relationship. The device has the advantages of novel structure, can accurately position the vacuum booster on the half-holders, ensures that the pre-cut opening is opposite to the rivet position, eliminates the rivet point deflection caused by equipment precision, and ensures the qualification rate and consistency of the rivet points of the front and rear shells of the vacuum booster.

Description

Technical Field

[0001] This invention belongs to the field of automotive power booster manufacturing, and particularly relates to a closing device and method for a through-type front-mounted, rear-pre-cut vacuum booster, which is applied in the production process of through-type front-mounted, rear-pre-cut vacuum boosters for cars and microcars. Background Technology

[0002] A power booster is a component that uses hydraulic, pneumatic, vacuum (negative pressure), or electrical energy to increase the force applied to the pedal by the driver. Currently, power boosters include pneumatic boosters, vacuum boosters, electric boosters, and hydraulic boosters.

[0003] The vacuum booster assembly is a key component of the automotive braking system. Its main function is to amplify the servo force through the vacuum booster by applying the pedal force, which is then applied to the master cylinder, causing it to move forward and compress the brake fluid in the master cylinder. The hydraulic fluid is then delivered to the vehicle's braking system through the master cylinder outlet, thereby achieving the vehicle's braking function.

[0004] Early vacuum boosters were mostly non-through rear-enclosed front structures, using the vacuum pressure difference between the front and rear chambers to generate pressure and thus increase the output force, achieving the boosting effect. As vehicle braking systems have gradually upgraded, the requirements for booster structure stability, improved boosting effect, and simplified end-cutting process have evolved into the current through-type front-enclosed rear pre-cut vacuum booster structure.

[0005] The vacuum booster assembly with a through-type front-and-rear pre-cut structure has high requirements for the riveting points at the front and rear housings. The rivet needs to be precisely positioned at the pre-cut position. Due to the small gap between the front and rear housings of the product, and the influence of equipment precision, when the vacuum booster falls on the support, the front housing will collide with the support and bounce, making it impossible to control the position of the vacuum booster on the support. This prevents the pre-cut from being aligned with the rivet position, causing the rivet point to be skewed and generating a large number of scraps. Summary of the Invention

[0006] This invention provides a closing device and method for a through-type front-and-back pre-cut vacuum booster to solve the problem that the vacuum booster cannot accurately land on the support and will cause jumping, making it impossible to control the position of the vacuum booster on the support, and making it impossible to align the pre-cut with the rivet position, resulting in skewed rivets and a large number of defective products. This invention ensures that the pre-cut rivet is aligned with the rivet position, thus ensuring the quality of the rivets.

[0007] The technical solution adopted in this invention includes a closing fixture, a mounting bracket, a guide sleeve, and a traveling fixture. The closing fixture presses the rear housing of the vacuum booster with a positioning ring. The two halves of the mounting bracket are combined to form a circular positioning ring, which forms a clearance fit with the front housing of the vacuum booster. The guide sleeve is tightened to the guide rod of the vacuum booster and is upside down on the traveling fixture. The guide sleeve rests on the positioning hole of the traveling fixture to form a positioning relationship.

[0008] The finishing fixture includes a body, a hexagonal cylindrical screw, a positioning ring, a wing nut, a screw, a guide screw, a tool holder, a tool washer, a rivet, and a pin. The positioning ring is fixedly connected to the inside of the body by the hexagonal cylindrical screw, the tool holder is connected to the outside of the body by the pin, the rivet is slidably connected to the tool holder, the guide screw is threaded to the tool holder and its front end is located in the guide groove of the rivet, the tool washer is sleeved between the rivet and the tool holder, the screw is threaded to the body, and the wing nut is threaded to the front end of the screw.

[0009] The sealing method using the sealing device with the aforementioned through-type front-wrapped and rear-pre-cut vacuum booster includes the following steps:

[0010] (1) The closing fixture is fastened to the hydraulic cylinder of the closing equipment by wing nuts and screws. The rivet is connected to the hydraulic cylinder through the groove. The support is fixed at the lateral position of the closing equipment and connected to the side cylinder.

[0011] (2) When the front and rear housings of the vacuum booster are assembled, the equipment presses the front and rear housings together and tightens the guide sleeve at the guide rod of the vacuum booster and then flips it onto the accompanying fixture so that the guide sleeve falls on the positioning hole of the accompanying fixture to form a positioning relationship.

[0012] (3) After the front and rear shells are assembled, the vacuum booster drives the accompanying fixture to the closing equipment station via the conveyor belt. The lower lifting device lifts the accompanying fixture, so that the vacuum booster rises to the appropriate position. Under the push of the side cylinder, the two halves of the closing support are combined to form a circular positioning ring. The lower lifting device falls down, and the accompanying fixture separates from the vacuum booster. At this time, the vacuum booster is inverted, and the outer circle of the front shell falls on the closing support, so as to avoid the closing support from having a matching relationship with the narrow gap between the front shell and the rear shell. There will be no interference between the front shell and the closing support, which will cause the pre-cut position to change.

[0013] (4) Then the closing tool falls onto the support under the drive of the falling device. The positioning ring presses the rear housing and leaves the rivet position open, so that the rivet is opposite to the pre-cut position of the front housing. The rivet is compressed by the hydraulic cylinder under the drive of the hydraulic cylinder, so that the front housing undergoes permanent deformation and forms a rivet point to form a solid connection with the rear housing.

[0014] (5) After the closing is completed, the closing fixture rises under the drive of the upper oil cylinder, so that the positioning ring separates from the vacuum booster. The lower lifting device lifts the accompanying fixture, so that the guide sleeve falls into the positioning hole of the accompanying fixture. Under the drive of the side oil cylinder, the closing fixture separates into two halves. The lower lifting device drives the accompanying fixture and the vacuum booster to fall onto the conveyor belt and then leave the closing process, completing the closing work of the front and rear shells.

[0015] In step (2) of the present invention, the guide sleeve and the accompanying fixture form a positioning relationship, so that the pre-cut opening of the front housing of the vacuum booster can be aligned with the position of the rivet.

[0016] In step (3) of the present invention, since the front housing is below at this time, the support only forms a positioning relationship with the front housing, which effectively avoids the front housing from jumping on the support due to poor equipment accuracy.

[0017] In step (4) of this invention, the feed amount of the rivet is adjusted by adjusting the rivet pad, and the depth of the rivet point is controlled to meet the requirements of the product pull-out force.

[0018] The beneficial effects of this invention are its novel structure and inverted vacuum booster, allowing the front housing to precisely rest on the support, avoiding any fit between the support and the narrow gap between the front and rear housings. This effectively prevents runout caused by poor equipment precision, ensuring the pre-cut rivet point is aligned with the rivet knife position and guaranteeing the rivet's quality. The guide rod and guide sleeve cooperate, with the guide sleeve falling into the positioning hole of the accompanying fixture to form a positioning relationship, ensuring the pre-cut of the front housing is aligned with the rivet knife position. Furthermore, the rivet depth can be adjusted by adjusting the thickness of the rivet pad, ensuring the consistency of the rivets. This invention eliminates rivet misalignment caused by equipment precision issues, guaranteeing the quality and consistency of rivets riveted between the front and rear housings of the vacuum booster. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0020] like Figure 1 As shown: It includes a closing fixture 1, a mounting bracket 2, a guide sleeve 3, and a traveling fixture 4. The closing fixture 1 presses the rear housing of the vacuum booster 5 with a positioning ring 1.3. The two halves of the mounting bracket 2 are combined to form a circular positioning ring, which forms a clearance fit with the front housing of the vacuum booster 5. The guide sleeve 3 is tightened to the guide rod of the vacuum booster 5 and is upside down on the traveling fixture 4. The guide sleeve 3 rests on the positioning hole of the traveling fixture 4 to form a positioning relationship.

[0021] The finishing fixture 1 includes a body 1.1, a hexagonal cylindrical screw 1.2, a positioning ring 1.3, a wing nut 1.4, a screw 1.5, a guide screw 1.6, a tool holder 1.7, a tool washer 1.8, a rivet 1.9, and a pin 1.10. The positioning ring 1.3 is fixedly connected to the inside of the body 1.1 by the hexagonal cylindrical screw 1.2. The tool holder 1.7 is connected to the outside of the body 1.1 by the pin 1.10. The rivet 1.9 is slidably connected to the tool holder 1.7. The guide screw 1.6 is threadedly connected to the tool holder 1.7, with its front end located in the guide groove of the rivet 1.9. The tool washer 1.8 is sleeved between the rivet 1.9 and the tool holder 1.7. The screw 1.5 is threadedly connected to the body 1.1, and the wing nut 1.4 is threadedly connected to the front end of the screw 1.5.

[0022] The sealing method using the sealing device with the aforementioned through-type front-wrapped and rear-pre-cut vacuum booster includes the following steps:

[0023] (1) The closing fixture 1 is fastened to the hydraulic cylinder of the closing equipment by the wing nut 1.4 and the screw 1.5. The rivet 1.9 is connected to the hydraulic cylinder through the groove. The support 2 is fixed at the lateral position of the closing equipment and connected to the side cylinder.

[0024] (2) When the front and rear housings of the vacuum booster 5 are assembled, the equipment presses the front and rear housings together, and the guide sleeve 3 is tightened at the guide rod of the vacuum booster 5 and then inverted onto the accompanying fixture 4 so that the guide sleeve 3 falls on the positioning hole of the accompanying fixture 4 to form a positioning relationship.

[0025] (3) After the front and rear shells are assembled, the vacuum booster 5 drives the accompanying clamp 4 to the closing equipment station via the conveyor belt. The lower lifting device lifts the accompanying clamp 4, so that the vacuum booster 5 rises to the appropriate position. Under the push of the side cylinder, the two halves of the clamp 2 are joined together to form a circular positioning ring. The lower lifting device falls down, and the accompanying clamp 4 separates from the vacuum booster 5. At this time, the vacuum booster 5 is inverted, and the outer circle of the front shell falls on the clamp 2. This avoids the clamp 2 from having a matching relationship with the narrow gap between the front shell and the rear shell, and will not cause the front shell to interfere with the clamp 2 and jump, resulting in a change in the pre-cut position.

[0026] (4) Then the closing tool 1 falls onto the support 2 under the drive of the falling device. The positioning ring 1.3 presses the rear housing and leaves the rivet position open, so that the rivet 1.9 is opposite to the pre-cut position of the front housing. The rivet 1.9 is compressed by the hydraulic cylinder under the drive of the hydraulic cylinder, so that the front housing undergoes permanent deformation and forms a rivet point to form a solid connection with the rear housing.

[0027] (5) After the closing is completed, the closing fixture 1 rises under the drive of the upper oil cylinder, so that the positioning ring 1.3 separates from the vacuum booster. The lower lifting device lifts the accompanying clamp 4, so that the guide sleeve 3 falls into the positioning hole of the accompanying clamp 4. Under the drive of the side oil cylinder, the closing support 2 separates into two halves. The lower lifting device drives the accompanying clamp 4 and the vacuum booster 5 to fall onto the conveyor belt and then leave the closing process, completing the closing work of the front and rear shells.

[0028] In step (2) of the present invention, the guide sleeve 3 and the accompanying clamp 4 form a positioning relationship, so that the pre-cut opening of the front housing of the vacuum booster 5 can be aligned with the position of the rivet 1.9.

[0029] In step (3) of the present invention, since the front housing is below at this time, the support 2 forms a positioning relationship with the front housing, which effectively avoids the front housing from jumping on the support due to poor equipment accuracy.

[0030] In step (4) of the present invention, the feed amount of the rivet 1.9 is adjusted by adjusting the rivet pad 1.8 to control the depth of the rivet and meet the requirements of the product pull-out force.

Claims

1. A method for closing a through-type front-wrapped, rear-pre-cut vacuum booster, characterized in that, The following sealing device and steps are adopted: The closing device includes a closing fixture, a closing support, a guide sleeve, and a traveling clamp. The closing fixture presses the rear housing of the vacuum booster with a positioning ring. The two halves of the closing support are combined to form a circular positioning ring, which forms a clearance fit with the front housing of the vacuum booster. The guide sleeve is tightened to the guide rod of the vacuum booster and is upside down on the traveling clamp. The guide sleeve rests on the positioning hole of the traveling clamp to form a positioning relationship. The finishing tool includes a body, a hexagonal cylindrical screw, a positioning ring, a wing nut, a screw, a guide screw, a tool sleeve, a tool washer, a rivet, and a pin. The positioning ring is fixedly connected to the inside of the body by the hexagonal cylindrical screw, the tool sleeve is connected to the outside of the body by the pin, the rivet is slidably connected to the tool sleeve, the guide screw is threaded to the tool sleeve and its front end is located in the guide groove of the rivet, the tool washer is sleeved between the rivet and the tool sleeve, the screw is threaded to the body, and the wing nut is threaded to the front end of the screw. The steps are as follows: (1) The closing fixture is fastened to the upper hydraulic cylinder of the closing equipment by wing nuts and screws. The rivet is connected to the hydraulic cylinder through the groove. The support is fixed at the lateral position of the closing equipment and connected to the side cylinder. (2) When the front and rear housings of the vacuum booster are assembled, the equipment presses the front and rear housings together and tightens the guide sleeve at the guide rod of the vacuum booster and then flips it onto the accompanying fixture so that the guide sleeve falls on the positioning hole of the accompanying fixture to form a positioning relationship. (3) After the front and rear shells are assembled, the vacuum booster drives the accompanying fixture to the closing equipment station via the conveyor belt. The lower lifting device lifts the accompanying fixture, so that the vacuum booster rises to the appropriate position. Under the push of the side cylinder, the two halves of the closing support merge to form a circular positioning ring. The lower lifting device falls down, and the accompanying fixture separates from the vacuum booster. At this time, the vacuum booster is inverted, and the outer circle of the front shell falls on the closing support, avoiding the narrow gap between the closing support and the front and rear shells from having a matching relationship. There will be no interference between the front shell and the closing support, and the pre-cut position will not change due to jumping. (4) Then the closing tool falls onto the support under the drive of the upper hydraulic cylinder. The positioning ring presses the rear housing and leaves the rivet position open, so that the rivet is opposite to the pre-cut position of the front housing. The rivet is compressed by the hydraulic cylinder under the drive of the front housing, so that the front housing undergoes permanent deformation and forms a rivet point to form a solid connection with the rear housing. (5) After the closing is completed, the closing fixture rises under the drive of the upper hydraulic cylinder, so that the positioning ring separates from the vacuum booster. The lower lifting device lifts the accompanying fixture, so that the guide sleeve falls into the positioning hole of the accompanying fixture. Under the drive of the side cylinder, the closing fixture separates into two halves. The lower lifting device drives the accompanying fixture and the vacuum booster to fall onto the conveyor belt and then leave the closing process, completing the closing work of the front and rear shells.

2. The closing method of a through-type front-wrapped, rear-pre-cut vacuum booster according to claim 1, characterized in that: In step (2), the guide sleeve and the accompanying fixture form a positioning relationship, so that the pre-cut opening of the front housing of the vacuum booster can be aligned with the position of the rivet.

3. The closing method of a through-type front-wrapped, rear-pre-cut vacuum booster according to claim 1, characterized in that: In step (3), since the front housing is below, the support only forms a positioning relationship with the front housing, which effectively avoids the front housing from jumping on the support due to poor equipment precision.

4. The closing method of a through-type front-wrapped, rear-pre-cut vacuum booster according to claim 1, characterized in that: In step (4), the feed rate of the rivet is adjusted by adjusting the rivet pad to control the depth of the rivet and meet the requirements of the product pull-out force.

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