A muffler shell clamping positioning device

Abstract

The utility model relates to a muffler cylinder clamping and positioning device, including frame, be provided with support spare on the frame, the support spare has the central hole, rotatablely support drive disc in the support spare, be equipped with a plurality of slider that surrounds the central hole distribution on the support spare, the slider passes through first guide portion and the second guide portion sliding cooperation of support spare, the second guide portion radial extension, the slider passes through third guide portion and the fourth guide portion sliding cooperation of drive disc, the fourth guide portion is along drive disc circumferential and radial composite extension, drive disc and swing arm's first end swing joint, swing arm's second end with movable drive block swing joint that can be opposite support spare, the in of slider stretches into the near heart end of central hole and connects tile -shaped clamping block.

Description

Technical Field

[0001] This utility model relates to a machining fixture, specifically to a muffler cylinder clamping and positioning device. Background Technology

[0002] Currently, the tapered section of the muffler's cylinder is commonly produced using spinning. Spinning involves fixing a thin flat plate or hollow blank onto a die on a spinning machine. While the blank rotates with the machine spindle, a spinning wheel or pusher applies pressure to the blank, causing localized plastic deformation. Spinning can achieve complex geometric features on various sheet metal workpieces and is particularly suitable for sheet metal forming. It can be used to complete complex geometric features such as deep drawing, flanging, necking, bulging, and hemming. Due to its unique advantages, spinning easily achieves lightweight, flexible, and efficient products, and is therefore highly valued in the processing of many parts.

[0003] Currently, the common method for spinning cylinders involves using two vertically opening and closing clamping blocks for quick clamping. However, this method limits clamping to the vertical direction, resulting in a relatively limited clamping position. When machining thinner parts, deformation and elliptical shapes can easily occur, leading to severe deformation during spinning. Furthermore, this clamping method requires high precision in the blank. When dimensional deviations occur in the blank, the entire clamping device only has two line contact points, making the tube blank prone to deformation and loss of roundness. This necessitates that the tube blank fit as closely as possible to the curvature of the clamp, placing high demands on the precision of the tube blank and limiting its flexibility for production adaptation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a muffler cylinder clamping and positioning device that can reliably clamp the cylinder blank, ensure processing accuracy, and improve the pass rate of spinning.

[0005] The purpose of this utility model is achieved as follows: A muffler cylinder clamping and positioning device includes a frame, a support member is provided on the frame, the support member has a central hole, a drive disk is rotatably supported in the support member, and a plurality of sliders distributed around the central hole are provided on the support member.

[0006] The slider is slidably engaged with a second guide portion of the support member via a first guide portion, the second guide portion extending radially; the slider is slidably engaged with a fourth guide portion of the drive disk via a third guide portion, the fourth guide portion extending both circumferentially and radially along the drive disk.

[0007] The drive disk is movably connected to the first end of the swing arm, the second end of the swing arm is movably connected to the drive block that can move relative to the support member, and the proximal end of the slider that extends into the central hole is connected to the tile-shaped clamping block.

[0008] The support member includes an upper plate and a lower plate. A drive disk is installed between the upper plate and the lower plate. A plurality of first arc-shaped slots are provided on the drive disk along the circumferential direction. First limiting pins are fitted in the first arc-shaped slots. The two ends of the first limiting pins are rotatably supported on the upper plate and the lower plate, respectively.

[0009] The rear end of the slider is provided with a fork, which is radially inserted into the drive disk. The first guide portion includes the upper sidewall and the lower sidewall of the fork, and the second guide portion includes a first radial groove provided on the upper plate and a second radial groove provided on the lower plate.

[0010] The third guide portion includes a second limiting pin supported within the fork opening, and the fourth guide portion includes a second arc-shaped hole or strip hole disposed on the drive disk. The second arc-shaped hole or strip hole extends along the circumference and radial direction of the drive disk, and the second limiting pin passes through the second arc-shaped hole or strip hole in the vertical direction.

[0011] The clamping block slides axially with the slider and is axially locked by an unlockable locking mechanism.

[0012] The slider is provided with a groove along the axial direction, and the back of the clamping block is provided with a guide rib that slides in cooperation with the groove. The lower section of the back of the clamping block is provided with a first locking mechanism. The first locking mechanism includes a first limiting block of the elastic floating support. The first limiting block is used to abut and limit the end of the slider. The slider is provided with a second locking mechanism. The second locking mechanism includes a second limiting block of the elastic floating support. The guide rib is provided with a locking groove that cooperates with the second limiting block.

[0013] The guide rib is installed in the mounting groove of the clamping block and is connected and fixed to the clamping block by fasteners.

[0014] The cross-section of the guide rib is wider at the top and narrower at the bottom.

[0015] The first limiting block is slidably installed in the first sliding hole of the clamping block. A compression spring is provided in the first sliding hole to make the first limiting block have an outward tendency. The head of the first connecting bolt is slidably engaged with the large diameter section of the first stepped hole of the clamping block, and its rod passes through the small diameter section of the stepped hole. The front end of the first connecting bolt is threadedly connected to the first limiting block.

[0016] The second limiting block is slidably installed in the second sliding hole of the slider. A compression spring is provided in the second sliding hole to make the second limiting block have an outward tendency. The head of the second connecting bolt is slidably engaged with the large diameter section of the second stepped hole of the second limiting block. Its rod passes through the small diameter section of the stepped hole, and the front end of the second connecting bolt is threadedly connected to the slider.

[0017] The frame is provided with guide posts, and the drive block is slidably engaged with the guide posts on the frame through a sliding sleeve. The drive block is connected to the connecting sleeve through a connector.

[0018] The advantages of the above scheme are as follows: the frame supports the support components, etc., and the central hole on the support component allows the tube blank to pass through. Multiple sliders can be radially clamped from multiple directions. Clamping can be performed in all directions. When there is an error in the tube blank, it can be clamped at multiple points in multiple directions. This avoids the problem of the tube blank not being able to fit against the clamping block when clamping from top to bottom when there is an error in the tube blank. There are only two line contact clamping positions in the entire clamping process, which can easily lead to deformation of the tube blank. The slider can achieve radial sliding. The first guide part and the second guide part cooperate to constrain the radial movement of the slider on the support component. The rotatable drive disk rotates relative to the support component, which in turn drives the fourth guide part to move, which in turn forces the third guide part to move radially, thereby completing the clamping and releasing operations. The movement of the drive disc is achieved by the swinging of the swing arm. When the drive blocks move relative to each other, the swing arm is forced to translate and swing. This allows the drive disc to rotate forward and backward in the circumferential direction via traction at the first end, thus achieving the clamping and release of the tube blank. This method ensures reliable clamping of the tube blank, guarantees machining accuracy, and improves the yield rate of spinning.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view from the first perspective of the present invention;

[0022] Figure 3 This is an exploded view from a second perspective of the present invention;

[0023] Figure 4 An exploded view of the guide rib mating structure from a first-person perspective.

[0024] Figure 5 This is an exploded view of the guide rib mating structure from a second perspective.

[0025] Figure 6 This is a schematic diagram of the drive disk.

[0026] In the attached diagram, 100 is the frame, 101 is the guide post, 102 is the connecting sleeve, 110 is the support component, 111 is the upper plate, 112 is the lower plate, 113 is the center hole, 120 is the drive disc, 121 is the first arc-shaped slot, 122 is the first limiting pin, 123 is the second arc-shaped hole, 200 is the slider, 201 is the fork, 202 is the second limiting pin, 203 is the second limiting block, 205 is the second sliding hole, and 300 is... The swing arm has the following components: 301 is the first end, 302 is the second end, 400 is the drive block, 500 is the clamping block, 501 is the guide rib, 502 is the mounting groove, 503 is the first limiting block, 504 is the first sliding hole, 505 is the first stepped hole, 1111 is the first radial sliding groove, 1121 is the second radial sliding groove, 2011 is the upper sidewall, 2012 is the lower sidewall, 2031 is the second stepped hole, and 5011 is the locking groove. Detailed Implementation

[0027] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms center, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, and outer, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, the terms first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as first and second can be used to explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, multiple means two or more. It should be noted that in practical applications, due to limitations in equipment accuracy or installation errors, absolute parallelism or perpendicularity is difficult to achieve. The descriptions of vertical, parallel, or unidirectional in this application are not absolute limitations, but rather indicate that vertical or parallel structural settings can be achieved within a preset error range, and the corresponding preset effects can be achieved. In this way, the technical effects of the defined features can be maximized, and the corresponding technical solutions can be easily implemented, thus having high feasibility.

[0030] See Figures 1-6 An embodiment of a muffler cylinder clamping and positioning device includes a frame 100, on which a support member 110 is disposed. The support member 110 has a central hole 113, and a drive disk 120 is rotatably supported within the support member 110. A plurality of sliders 200 distributed around the central hole 113 are provided on the support member 110.

[0031] The slider 200 is slidably engaged with the second guide portion of the support member 110 via a first guide portion, the second guide portion extending radially; the slider 200 is slidably engaged with the fourth guide portion of the drive disk 120 via a third guide portion, the fourth guide portion extending both circumferentially and radially along the drive disk 120.

[0032] The drive disk 120 is movably connected to the first end 301 of the swing arm 300, the second end 302 of the swing arm 300 is movably connected to the drive block 400 which can move relative to the support member, and the proximal end of the slider 200 extending into the central hole 113 is connected to the tile-shaped clamping block 500.

[0033] In some embodiments, the support member 110 includes an upper plate 111 and a lower plate 112, wherein the upper plate 111 and the lower plate 112 can be connected to form an integral structure by a support block or fasteners. Alternatively, the two ends of the upper plate 111 and the lower plate 112 can be connected to corresponding connecting blocks to maintain relative positional stability. A drive disk 120 is installed between the upper plate 111 and the lower plate 112. The drive disk 120 has several first arc-shaped slots 121 arranged along its circumference. First limiting pins 122 fit within the first arc-shaped slots 121, and the two ends of the first limiting pins 122 are rotatably supported on the upper plate 111 and the lower plate 112, respectively. In this configuration, the arc-shaped slots constrain the drive disk 120, allowing it to rotate circumferentially. The first limiting pins 122, fitted within the arc-shaped slots, can move relative to the slots. The relative rotation of the first limiting pins 122 relative to the upper plate 111 and the lower plate 112 reduces friction.

[0034] In some embodiments, a fork 201 is provided at the rear end of the slider 200. The fork 201 is radially inserted into the drive disk 120. The first guide portion includes an upper sidewall 2011 and a lower sidewall 2012 of the fork 201. The second guide portion includes a first radial groove 1111 provided on the upper plate 111 and a second radial groove 1121 provided on the lower plate 112. In this manner, the upper sidewall 2011 cooperates with the first radial groove 1111 to constrain the upper end of the slider 200 and make it move radially. The lower sidewall 2012 cooperates with the second radial groove 1121 to constrain the lower end of the slider 200, making the sliding of the entire slider 200 more stable. At the same time, the structure of the guide mechanism is relatively simple, avoiding a large number of machining operations on large workpieces.

[0035] In some embodiments, the third guide portion includes a second limiting pin 202 supported within the fork 201. The second limiting pin 202 engages with a corresponding arc-shaped hole or slot to constrain the direction of movement. The fourth guide portion includes a second arc-shaped hole 123 or slot provided on the drive disk 120, extending circumferentially and radially along the drive disk 120. If it is an arc-shaped slot, the arc-shaped slot is concentric and gradually contracts, for example, extending in a planar spiral or parabolic shape, so that it has extension components in both circumferential and radial extension. If it is a slot, the extension direction of the slot has an angle with both the circumferential and radial directions, so that it can satisfy the requirement of circumferential and radial extension. The second limiting pin 202 passes through the second arc-shaped hole 123 or slot in the vertical direction, forming a mutual engagement. During movement, it has a radial motion component, realizing the reciprocating drive of the slider 200.

[0036] In some embodiments, the clamping block 500 and the slider 200 are axially slidably engaged and axially locked by an unlockable locking mechanism. In this way, when the specifications of the processed products vary greatly, the clamping block 500 can be replaced with one that is compatible with the product. The clamping block 500 and the slider 200 move relative to each other by axial sliding. After replacement, the locking mechanism locks them to prevent relative movement between them in the axial direction.

[0037] In some embodiments, the slider 200 is provided with a groove along the axial direction, and the back of the clamping block 500 is provided with a guide rib 501 that slides with the groove. The guide rib 501 and the groove can achieve a corresponding axial sliding fit. The lower section of the back of the clamping block 500 is provided with a first locking mechanism. The first locking mechanism includes a first limiting block 503 of an elastic floating support, which abuts against and limits the end of the slider 200. The first locking mechanism can limit the end of the slider 200, preventing the clamping block 500 from continuing to move relative to the slider 200. A second locking mechanism is provided on the slider 200. The second locking mechanism includes a second limiting block 203 of an elastic floating support, and the guide rib 501 is provided with a locking groove 5011 that cooperates with the second limiting block 203. The relative movement of the clamping block 500 can be limited by the embedded cooperation of the second limiting block 203 and the locking groove 5011. The first and second locking mechanisms define the position of the clamping block 500. To prevent the clamping block 500 from moving axially when it is not unlocked.

[0038] In some embodiments, the first limiting block 503 is slidably installed in the first sliding hole 504 of the clamping block 500. A compression spring is provided in the first sliding hole 504 to make the first limiting block 503 have an outward tendency. Specifically, the head of the first connecting bolt is slidably engaged with the large diameter section of the first stepped hole 505 of the clamping block 500, and its rod passes through the small diameter section of the stepped hole. The front end of the first connecting bolt is threadedly connected to the first limiting block 503. In this way, during assembly, the first limiting block 503 retracts to facilitate assembly. After assembly, the first limiting block 503 extends outward to limit the guide rib 501.

[0039] In some embodiments, the second limiting block 203 is slidably installed in the second sliding hole 205 of the slider 200. A compression spring is provided in the second sliding hole 205 to give the second limiting block 203 an outward extension tendency. Specifically, the head of the second connecting bolt slides in cooperation with the large-diameter section of the second stepped hole 2031 of the second limiting block 203, its rod passing through the small-diameter section of the stepped hole, and the front end of the second connecting bolt is threadedly connected to the slider 200. In this way, during assembly, the second limiting block 203 retracts for easy assembly. After the guide rib 501 reaches the designated position, the second limiting block 203 extends outward and engages with the corresponding locking groove 5011, limiting the guide rib 501. Unlocking can be achieved by pressing the limiting block to retract it.

[0040] In some embodiments, a guide post 101 is provided on the frame 100, and the drive block 400 is slidably engaged with the guide post 101 on the frame 100 through a sliding sleeve. The guide post 101 guides the drive block 400 and enables linear sliding. The drive block 400 is connected to the connecting sleeve 102 through a connector. The connecting sleeve 102 can connect the drive block 400 to the drive rod or drive cylinder on the frame 100 to achieve reciprocating linear motion, thereby driving the reciprocating linear motion of the drive block 400.

[0041] In some embodiments, the guide rib 501 is installed in the mounting groove 502 of the clamping block 500 and is connected and fixed to the clamping block 500 by fasteners. In this way, the guide rib 501 can be replaced after wear, maintaining high sliding fit accuracy and ensuring the stable position of the clamping block 500 on its circumference. Furthermore, the cross-section of the guide rib 501 is wider at the top and narrower at the bottom, for example, it can be trapezoidal, dovetail-shaped, or inverted T-shaped, so that the guide rib 501 only has a degree of freedom of movement in the sliding direction.

[0042] Using the above scheme, multiple sliders 200 can radially clamp the tube blank from multiple directions, clamping in all directions. The first and second guide parts cooperate to constrain the radial movement of the sliders 200 on the support 110. The rotatable drive disk 120 rotates relative to the support 110, thereby driving the fourth guide part to move, which in turn forces the third guide part to move radially, thus completing clamping and releasing operations. The movement of the drive disk 120 can be achieved by the swing of the swing arm 300. When the drive block 400 moves relative to it, the swing arm 300 can be forced to translate and swing, and then the drive disk 120 can be rotated forward and backward in the circumferential direction by the traction of the first end 301, realizing the clamping and releasing of the tube blank. During clamping, the drive block 400 moves and is connected to the drive rod or drive cylinder on the frame 100. The drive block 400 pulls the swing arm 300, causing the drive disk 120 to rotate. After rotation, the fourth and third guide parts cooperate to force the sliders to slide outward. Each slider 200 in the center hole 113 moves radially outward, facilitating the clamping of the pipe blank. After the pipe blank is in place, the drive block 400 pushes the swing arm 300, which swings, causing the drive disk 120 to rotate. Through the cooperation of the fourth and third guide parts, each slider 200 moves centripetally, clamping the pipe blank. The first guide part and the second guide part of the support 110 are always in sliding engagement to constrain the sliders 200, causing them to move radially. Using this invention, the pipe blank can be reliably clamped, ensuring processing accuracy and improving the yield rate of spinning.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A muffler shell clamping positioning device characterized by: Includes a frame (100), on which a support member (110) is provided, the support member (110) having a central hole (113), the drive disk (120) is rotatably supported in the support member (110), and the support member (110) is provided with a plurality of sliders (200) distributed around the central hole (113). The slider (200) is slidably engaged with the second guide portion of the support member (110) via a first guide portion, the second guide portion extending radially; the slider (200) is slidably engaged with the fourth guide portion of the drive disk (120) via a third guide portion, the fourth guide portion extending both circumferentially and radially along the drive disk (120). The drive disk (120) is movably connected to the first end (301) of the swing arm (300), the second end (302) of the swing arm (300) is movably connected to the drive block (400) that can move relative to the support member, and the proximal end of the slider (200) extending into the central hole (113) is connected to the tile-shaped clamping block (500).

2. A muffler shell holding and positioning device according to claim 1, characterized in that: The support member (110) includes an upper plate (111) and a lower plate (112). A drive disk (120) is installed between the upper plate (111) and the lower plate (112). A plurality of first arc-shaped slots (121) are provided on the drive disk (120) along the circumferential direction. A first limiting pin (122) is fitted in the first arc-shaped slot (121). The two ends of the first limiting pin (122) are rotatably supported on the upper plate (111) and the lower plate (112) respectively.

3. A muffler shell holding and positioning device according to claim 2, wherein: The rear end of the slider (200) is provided with a fork (201), which is radially inserted into the drive disk (120). The first guide part includes the upper sidewall (2011) and the lower sidewall (2012) of the fork (201). The second guide part includes the first radial groove (1111) provided on the upper plate (111) and the second radial groove (1121) provided on the lower plate (112).

4. A muffler shell holding and positioning device according to claim 3, wherein: The third guide portion includes a second limiting pin (202) supported in the fork (201), and the fourth guide portion includes a second arc-shaped hole (123) or a strip hole disposed on the drive disk (120). The second arc-shaped hole (123) or the strip hole extends along the circumference and radial direction of the drive disk (120), and the second limiting pin (202) passes through the second arc-shaped hole (123) or the strip hole in the vertical direction.

5. A muffler shell holding and positioning device according to claim 1, wherein: The clamping block (500) slides axially with the slider (200) and is axially locked by an unlockable locking mechanism.

6. A muffler shell holding and positioning device according to claim 5, wherein: The slider (200) is provided with a groove along the axial direction, and the back of the clamping block (500) is provided with a guide rib (501) that slides with the groove. The lower section of the back of the clamping block (500) is provided with a first locking mechanism. The first locking mechanism includes a first limiting block (503) of the elastic floating support. The first limiting block (503) is used to abut and limit the end of the slider (200). The slider (200) is provided with a second locking mechanism. The second locking mechanism includes a second limiting block (203) of the elastic floating support. The guide rib (501) is provided with a locking groove (5011) that cooperates with the second limiting block (203).

7. A muffler shell holding and positioning device according to claim 6, wherein: The guide rib (501) is installed in the mounting groove (502) of the clamping block (500) and is connected and fixed to the clamping block (500) by fasteners.

8. A muffler cylinder clamping and positioning device according to claim 6, characterized in that: The cross-section of the guide rib (501) is wider at the top and narrower at the bottom.

9. A muffler cylinder clamping and positioning device according to claim 6, characterized in that: The first limiting block (503) is slidably installed in the first sliding hole (504) of the clamping block (500). A compression spring is provided in the first sliding hole (504) to make the first limiting block (503) have an outward tendency. The head of the first connecting bolt is slidably engaged with the large diameter section of the first stepped hole (505) of the clamping block (500), and its rod passes through the small diameter section of the stepped hole. The front end of the first connecting bolt is threadedly connected to the first limiting block (503). The second limiting block (203) is slidably installed in the second sliding hole (205) of the slider (200). A compression spring is provided in the second sliding hole (205) to make the second limiting block (203) have an outward tendency. The head of the second connecting bolt is slidably engaged with the large diameter section of the second stepped hole (2031) of the second limiting block (203), and its rod passes through the small diameter section of the stepped hole. The front end of the second connecting bolt is threadedly connected to the slider (200).

10. A muffler shell holding and positioning device according to claim 1, wherein: The frame (100) is provided with guide posts (101), and the drive block (400) is slidably engaged with the guide posts (101) on the frame (100) through a sliding sleeve. The drive block (400) is connected to the connecting sleeve (102) through a connector.

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