CN219075010U - Positioning mechanism - Google Patents

Abstract

The utility model discloses a positioning mechanism, which belongs to the technical field of positioning assistance and comprises a positioning assembly carrier assembly and a locking assembly, wherein the positioning assembly is provided with an inner cavity, a positioning groove and a sliding hole, the positioning groove is formed in the top surface of the positioning assembly, and the sliding hole is formed in the side wall of the positioning assembly and is communicated with the inner cavity; the carrier assembly comprises a shell at least sleeved outside part of the positioning assembly and a positioning boss fixedly connected to the top wall of the shell, the positioning boss is assembled in the positioning groove in an interference manner, and an inner pull ring is arranged on the inner side wall of the shell; the locking component comprises a movable piece movably arranged in the inner cavity and a sliding block which is pushed by the movable piece to slide in the sliding hole, and the sliding block can be propped against the inner pull ring. The positioning mechanism provided by the utility model can improve the connection reliability of the positioning assembly and the carrier assembly and ensure the positioning effect of the product.

Description

Positioning mechanism

Technical Field

The utility model relates to the technical field of positioning assistance, in particular to a positioning mechanism.

Background

In the process of processing the product on the numerical control machine tool, the product needs to be positioned by a positioning device so as to ensure the processing precision of the product.

In the prior art, positioning mechanism includes the base and can dismantle the carrier of connecting in the base, and the top surface of base has the constant head tank, and the carrier has the location lug that mutually supports with the constant head tank towards the surface of base, when needs are fixed a position the product, is fixed the product on the carrier, then control the carrier and be close to the base and remove to make location lug and constant head tank counterpoint, later support the location lug in the constant head tank, realized the location to the product.

However, in the prior art, the carrier is limited in the axial direction of the base only by the friction force between the positioning convex blocks and the groove walls of the positioning grooves, so that the carrier is easily separated from the base in the process of processing the product, the positioning of the product is failed, and the risk of damaging the product is also caused.

Disclosure of Invention

The utility model aims to provide a positioning mechanism which can improve the connection reliability of a positioning assembly and a carrier assembly and ensure the positioning effect of a product.

The technical scheme adopted by the utility model is as follows:

positioning mechanism includes:

the positioning assembly is provided with an inner cavity, a positioning groove and a sliding hole, the positioning groove is formed in the top surface of the positioning assembly, and the sliding hole is formed in the side wall of the positioning assembly and is communicated with the inner cavity;

the carrier assembly comprises a shell at least sleeved outside part of the positioning assembly and a positioning boss fixedly connected to the top wall of the shell, the positioning boss is assembled in the positioning groove in an interference manner, and an inner pull ring is arranged on the inner side wall of the shell;

the locking assembly comprises a movable piece movably arranged in the inner cavity and a sliding block pushed by the movable piece to slide in the sliding hole, and the sliding block can be propped against the inner pull ring.

Optionally, the sliding block is positioned in the inner cavity, one end of the sliding block is in butt joint with the inner pull ring under the pushing of the elastic force of the sliding block, and the other end of the sliding block is in butt joint with the top wall of the positioning component.

Optionally, the locating component includes location main part and sealing connection in the base of location main part, the constant head tank is located the top surface of location main part, the slide hole is located the lateral wall of location main part, the inner chamber by the location main part with the base encloses to establish and forms, the moving part with form the air cavity between the base, just the base has the intercommunication the inlet port of air cavity, gas in the air cavity can promote the moving part is in the axial displacement of location main part, in order to overcome the elasticity of elastic component will the sliding block is followed draw out in the interior pull ring.

Optionally, the moving part includes piston module and one end rigid coupling in the return pin of piston module, the one end of sliding block has first through-hole, the return pin wears to locate in the first through-hole, just the axis of return pin with the axis of piston module is crossing, the piston module with form the air cavity between the base, the piston module passes through the return pin drives the sliding block removes.

Optionally, the piston module has a contact surface that inclines to set up, the slide hole is the slope hole, and the axis of slide hole is perpendicular to the plane that the contact surface is located, the sliding block can butt in the contact surface.

Optionally, the sliding block has a curved surface that is used for contacting the piston module and is obliquely arranged, the first through hole is an oblique hole, and the oblique angle of the curved surface is 1.5-2.5 degrees greater than the oblique angle of the first through hole.

Optionally, the piston module includes the piston and the rigid coupling in the sealing block of piston bottom, the piston orientation sealing block's surface is equipped with spacing groove and intercommunication the inclined hole in spacing groove, the return pin include the head and connect in the pole portion of head, the head limit be arranged in the spacing groove and the butt in the sealing block, pole portion wears to locate in the inclined hole and the first through-hole, the sealing block with form between the base the air cavity.

Optionally, the positioning device further comprises a first sealing element, a second sealing element and a third sealing element, wherein the first sealing element is installed between the base and the positioning component in a sealing mode, the second sealing element is installed between the sealing block and the side wall of the positioning component in a sealing mode, the third sealing element is installed between the sealing block and the piston in a sealing mode, and the distance between the third sealing element and the side wall of the positioning component is smaller than the distance between the head and the side wall of the positioning component.

Optionally, one of the side wall of the piston and the inner side wall of the positioning assembly is provided with a piston guide groove, and the other is provided with a piston guide block matched with the piston guide groove, and the piston guide block is slidingly arranged in the piston guide groove.

Optionally, the inside wall of locating component still is equipped with dodges the groove, dodge the groove and be semi-cylindrical and follow locating component's axial extension, dodge the groove and be used for dodging the other end of return pin.

The utility model has at least the following beneficial effects:

according to the positioning mechanism provided by the utility model, the positioning assembly and the carrier assembly are limited in the axial direction of the positioning assembly by the friction force between the positioning boss and the positioning groove, and the sliding block of the locking assembly passes through the sliding hole of the positioning assembly and then is clamped into the inner pull ring of the shell to limit, so that the dual fixing and limiting of the carrier assembly by the positioning assembly are realized, the probability that the carrier assembly moves in the axial direction of the positioning assembly relative to the positioning assembly in the product processing process is reduced, the reliability of positioning products is improved, and the risk of damaging the products is also reduced.

Drawings

FIG. 1 is a perspective view of a positioning mechanism provided by an embodiment of the present utility model;

FIG. 2 is a top view of a positioning mechanism provided by an embodiment of the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 2 in accordance with the present utility model;

FIG. 4 is a cross-sectional view of a housing provided by an embodiment of the present utility model;

FIG. 5 is a schematic view of a locking assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a piston according to an embodiment of the present utility model;

FIG. 7 is a bottom view of a piston provided by an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a piston provided by an embodiment of the present utility model;

FIG. 9 is a schematic structural view of a seal block according to an embodiment of the present utility model;

FIG. 10 is a cross-sectional view of a seal block provided by an embodiment of the present utility model;

FIG. 11 is a cross-sectional view of a positioning body provided by an embodiment of the present utility model;

FIG. 12 is a bottom view of a positioning body provided by an embodiment of the present utility model;

FIG. 13 is a schematic view of a positioning assembly according to an embodiment of the present utility model;

fig. 14 is a schematic structural view of a slider according to an embodiment of the present utility model;

FIG. 15 is a second schematic structural diagram of a slider according to an embodiment of the present utility model;

FIG. 16 is a cross-sectional view of a slider provided by an embodiment of the present utility model;

fig. 17 is a schematic view of a positioning structure of a housing not shown according to an embodiment of the present utility model.

In the figure:

1. a positioning assembly; 11. an inner cavity; 12. a positioning groove; 13. a slide hole; 14. a positioning main body; 141. an outer protruding portion; 15. a base; 16. an avoidance groove; 17. a piston guide block; 18. a block;

2. a carrier assembly; 21. a housing; 211. an inner pull ring; 2111. an action surface; 212. a housing guide block; 22. positioning the boss;

3. a locking assembly; 31. a movable member; 311. a piston module; 3111. a contact surface; 3112. a piston; 3113. a sealing block; 3114. a limit groove; 3115. inclined holes; 3116. a piston guide groove; 3117. a receiving groove; 3118. a gas tank; 312. a return pin; 3121. a head; 3122. a stem portion; 32. a sliding block; 321. a first through hole; 322. a curved surface;

4. an air cavity; 5. an air inlet hole; 51. a vertical section; 52. a horizontal section; 6. an elastic member; 7. a first seal; 8. a second seal; 9. a third seal; 10. a positioning pin; 20. and (5) a bolt.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a positioning mechanism, can improve the reliability that positioning assembly and carrier subassembly are connected, guarantees the effect of product location.

As shown in fig. 1 to 3, the positioning mechanism includes a positioning component 1, a carrier component 2 and a locking component 3.

The positioning assembly 1 is provided with an inner cavity 11, a positioning groove 12 and a sliding hole 13. Wherein, the positioning component 1 is a hollow structure, more specifically, the positioning component 1 is a hollow structure with an opening at the bottom end. The positioning groove 12 is positioned on the top surface of the positioning component 1, and the sliding hole 13 is arranged on the side wall of the positioning component 1 and communicated with the inner cavity 11. The positioning assembly 1 includes a plurality of blocks 18, and the plurality of blocks 18 are used to form the positioning groove 12, specifically, one positioning groove 12 can be formed between two adjacent blocks 18. In this embodiment, the cross section of the block 18 is fan-shaped, and the positioning groove 12 is formed as a groove structure with two open ends.

The carrier assembly 2 includes a housing 21 at least partially sleeved outside the positioning assembly 1 from the top end of the positioning assembly 1, and a positioning boss 22 fixedly connected to the top wall of the housing 21. The positioning boss 22 is matched with the positioning groove 12, the positioning boss 22 is in interference fit in the positioning groove 12, and the positioning boss 22 is in contact with the block 18. Wherein, the inner side wall of the shell 21 contacts with the outer side wall of the positioning component 1, and the inner side wall of the shell 21 is provided with an inner pull ring 211, and in this embodiment, the inner pull ring 211 is specifically an annular groove. In some embodiments, the positioning slots 12 are provided with a plurality of positioning bosses 22 in a one-to-one correspondence, and each positioning boss 22 is interference fit in its corresponding positioning slot 12.

As shown in fig. 3, the locking assembly 3 includes a movable member 31 movably mounted in the inner cavity 11 and a sliding block 32 pushed by the movable member 31 to slide in the sliding hole 13, and the sliding block 32 can abut against the inner pull ring 211 to lock the carrier assembly 2 in the axial direction of the positioning assembly 1. It should be noted that, the movable member 31 can move in the inner cavity 11 along the axial direction of the positioning assembly 1, so as to push the sliding block 32 to slide in the sliding hole 13, so as to be clamped into the inner pull ring 211 on the inner side wall of the housing 21, thereby realizing connection between the housing 21 and the positioning assembly 1.

In the positioning mechanism provided in this embodiment, in the axial direction of the positioning component 1, the positioning component 1 and the carrier component 2 are limited by the friction force between the positioning boss 22 and the positioning groove 12, and the sliding block 32 of the locking component 3 passes through the sliding hole 13 of the positioning component 1 and then is clamped into the inner pull ring 211 of the shell 21 to limit, so that the dual fixing and limiting of the positioning component 1 to the carrier component 2 are realized, the probability that the carrier component 2 moves in the axial direction of the positioning component 1 relative to the positioning component 1 in the product processing process is reduced, the reliability of positioning products is improved, and the risk of damaging the products is also reduced.

In this embodiment, as shown in fig. 3, the positioning mechanism further includes an elastic member 6 located in the inner cavity 11, and the axis of the elastic member 6 is parallel to the axis of the positioning assembly 1. One end of the elastic piece 6 is abutted with the movable piece 31, and the other end of the elastic piece 6 is abutted with the top wall of the positioning assembly 1, so that the movable piece 31 can be elastically abutted with the positioning assembly 1. The sliding block 32 is propped against the inner pull ring 211 under the pushing of the elastic force of the elastic piece 6, so that the positioning main body 14 is connected with the shell 21. That is, the elastic member 6 is always in a compressed state and provides the slider 32 with a force against the inner tab 211 so that the slider 32 can be closely fitted to the case 21. In some embodiments, the inner pull ring 211 axially positions the slider 32 of the positioning assembly 1 to form a double position limitation on the slider 32, thereby improving the effect of the axial position limitation on the housing 21. Alternatively, the elastic member 6 may be a spring, and one or more may be provided.

It should be noted that the top surface of the positioning main body 14 has a groove structure, and the other end of the elastic member 6 is located in the groove structure to prevent the elastic member 6 from being failed.

Alternatively, as shown in fig. 3, the positioning assembly 1 includes a positioning body 14 and a base 15 sealingly coupled to a bottom end of the positioning body 14. The positioning groove 12 is disposed on the top surface of the positioning body 14, the sliding hole 13 is disposed on the side wall of the positioning body 14, and the inner cavity 11 is formed by surrounding the positioning body 14 and the base 15.

With continued reference to fig. 3, a relatively sealed air cavity 4 is formed between the movable member 31 and the base 15, and the base 15 has an air inlet 5 communicating with the air cavity 4, air can be input into the air cavity 4 through the air inlet 5, and the air in the air cavity 4 can push the movable member 31 to move in the axial direction of the positioning body 14, so as to overcome the elastic force of the elastic member 6 and pull the sliding block 32 out of the inner pull ring 211. That is, the gas in the gas chamber 4 can push the movable member 31 to move close to the top wall of the positioning body 14 to pull the sliding block 32 out of the inner pull ring 211, releasing the connection of the positioning body 14 and the housing 21 by the sliding block 32. Alternatively, referring to fig. 3, the air intake hole 5 includes a vertical section 51 and a horizontal section 52 that are communicated, and the vertical section 51 communicates with the air chamber 4. The horizontal section 52 is connected to an external air source.

In this embodiment, when the carrier assembly 2 is removed from the positioning assembly 1, an external air source needs to be connected, and under the action of air pressure in the air cavity 4, the movable member 31 moves upward to drive the sliding block 32 to slide inward, so as to release the connection between the positioning main body 14 and the housing 21, and at this time, the carrier assembly 2 can be removed from the positioning assembly 1. When the carrier assembly 2 and the positioning assembly 1 are in the connecting and positioning state, an external air source is not required to be connected, and the piston module 311 is pushed to move downwards and the sliding block 32 is pushed to move outwards to be in contact with the inner pull ring 211 only by the elastic potential energy of the elastic piece 6, so that the positioning function is realized.

Alternatively, as shown in fig. 5, the movable member 31 includes a piston module 311 and a return pin 312 with one end fixedly connected to the piston module 311. Wherein, one end of the sliding block 32 has a first through hole 321, the other end of the return pin 312 is inserted into the first through hole 321, and the axis of the return pin 312 intersects with the axis of the piston module 311, the axis of the piston module 311 extends along the vertical direction, and the return pin 312 is obliquely arranged, so that the sliding block 32 can be driven to slide in the sliding hole 13 through the wall of the first through hole 321 when the return pin 312 moves up and down. An air cavity 4 is formed between the bottom of the piston module 311 and the base 15, and the return pin 312 is configured to transmit the vertical movement of the piston module 311 to the approximately horizontal movement of the sliding block 32, that is, the piston module 311 drives the sliding block 32 to move through the return pin 312.

Further, as shown in fig. 6, the piston module 311 has a contact surface 3111 disposed obliquely, the contact surface 3111 is located on a side wall of the piston module 311, and the sliding hole 13 is an inclined hole, that is, an axis of the sliding hole 13 is not completely perpendicular to a side wall of the positioning body 14, but forms an included angle with the side wall of the positioning body 14. And, the axis of the sliding hole 13 is perpendicular to the plane of the contact surface 3111, one end of the sliding block 32 is clamped into the inner pull ring 211, the other end of the sliding block 32 can be abutted against the contact surface 3111, in this embodiment, the other end of the sliding block 32 can be abutted against the contact surface 3111, and the sliding block 32 can be in contact with the contact surface 3111. In this embodiment, the distance between the contact surface 311 and the axis of the piston module 311 gradually decreases along the direction in which the top end of the piston module 311 is directed toward the bottom end. By providing the contact surface 3111, the other end of the slider 32 can always be in contact with the contact surface 3111 during sliding, preventing the slider 32 from sliding out of the slide hole 13.

In the present embodiment, as shown in fig. 16, the slider 32 has a curved surface 322 provided obliquely, the first through hole 321 is an inclined hole, the curved surface 322 is for contact with the contact surface 3111, and the curved surface 322 is curved toward the axis of the piston module 311. The inclination angle of the curved surface 322 is 1.5-2.5 degrees larger than the inclination angle of the first through hole 321, so that when the sliding block 32 is retracted from the inner pull ring 211, the inner pull ring 211 can firstly release the curved surface 322 to provide a movable space for the return pin 312 to push the sliding block 32. In fig. 16, the sliding block 32 is used for a preset end surface contacting with the inner pull ring 211, the included angle between the curved surface 322 and the preset end surface is a first included angle a, the included angle between the axis of the first through hole 321 and the preset end surface is a second included angle b, and the first included angle a is 1.5-2.5 degrees larger than the second included angle b, preferably 2 degrees larger.

With continued reference to fig. 16, the predetermined end surface includes an inclined pressing surface 323, the inner pull ring 211 has an inclined inner pull ring acting surface 2111, and when the slider 32 is located in the inner pull ring 211, the pressing surface 323 is in contact with the inner pull ring acting surface 2111, and by providing the inclined inner pull ring acting surface 2111, the slider 32 is conveniently clamped into the inner pull ring 211.

Alternatively, as shown in fig. 6 to 10, the piston module 311 includes a piston 3112 and a sealing block 3113 fixedly connected to the bottom end of the piston 3112, and in this embodiment, the piston 3112 and the sealing block 3113 are connected by a bolt 20. Wherein, the surface of the piston 3112 facing the sealing block 3113 is provided with a limiting slot 3114 and an inclined hole 3115 communicating with the limiting slot 3114. The piston 3112 is shaped like an "i", and the inclined hole 3115 and the limit groove 3114 penetrate through a lateral portion of the bottom end of the piston 3112, and in this embodiment, an inclination angle of the inclined hole 3115 is the same as an inclination angle of the contact surface 3111. As shown in fig. 3, the return pin 312 includes a head 3121 and a stem 3122 connected to the head 3121. The head 3121 is limited in the limiting groove 3114, and the head 3121 abuts against the sealing block 3113, so that the head 3121 can be pushed to move when the sealing block 3113 moves. The rod 3122 is disposed through the inclined hole 3115 and the first through hole 321, the axis of the rod 3122 is parallel to the axis of the inclined hole 3115, and the rod 3122 is attached to the wall of the inclined hole 3115, so as to prevent the return pin 312 from shaking. The sealing block 3113 forms an air chamber 4 with the base 15. In some embodiments, the bottom surface of the sealing block 3113 has a gas slot 3118, the gas slot 3118 and the base 15 cooperating to form the gas cavity 4.

In this embodiment, in order to ensure the tightness of the air cavity 4, as shown in fig. 3, the positioning mechanism further includes a first sealing member 7, a second sealing member 8, and a third sealing member 9. Wherein, the first sealing member 7 is installed between the base 15 and the bottom end of the positioning assembly 1 in a sealing manner, and is used for sealing a gap between the base 15 and the bottom end of the positioning assembly 1. A second seal 8 is sealingly mounted between the sealing block 3113 and the sidewall of the positioning assembly 1 for sealing a gap between the sealing block 3113 and the sidewall of the positioning assembly 1. The third sealing member 9 is sealingly mounted between the sealing block 3113 and the piston 3112 for sealing a gap between the sealing block 3113 and the piston 3112, and a distance between the third sealing member 9 and a sidewall of the positioning assembly 1 is smaller than a distance between the head 3121 and the sidewall of the positioning assembly 1, so that the second sealing member 8 and the third sealing member 9 can form a double seal, improving sealing effect. The first sealing member 7, the second sealing member 8, and the third sealing member 9 are all provided to ensure the sealing property of the air chamber 4. In this embodiment, the first sealing member 7, the second sealing member 8 and the third sealing member 9 are sealing rings, and the positions where the first sealing member 7, the second sealing member 8 and the third sealing member 9 are installed are respectively provided with a receiving groove structure, for example, as shown in fig. 10, a side wall of the sealing block 3113 is provided with a receiving groove 3117 for receiving the second sealing member 7.

Optionally, referring to fig. 13, in order to facilitate the setting of the first sealing element 7 and the positioning connection between the positioning main body 14 and the base 15, an outer flange 141 is provided at the bottom end of the positioning main body 14, and a positioning pin 10 is provided between the outer flange 141 and the base 15 for positioning and mounting the positioning main body 14 and the base 15.

In this embodiment, in order to facilitate assembly of the piston 3112 with the positioning unit 1 and prevent rotation of the piston 3112, one of the side wall of the piston 3112 and the inner side wall of the positioning unit 1 is provided with a piston guide groove 3116, and the other is provided with a piston guide block 17 matched with the piston guide groove 3116, and the piston guide block 17 is slidably disposed in the piston guide groove 3116. As shown in fig. 6, a piston guide groove 3116 is provided at a side wall of the piston 3112, and a piston guide block 17 is provided at an inner side wall of the positioning body 14. In the present embodiment, a plurality of piston guide blocks 17 are provided in one-to-one correspondence with the piston guide grooves 3116. The piston guide block 17 has a triangular cross section.

Referring to fig. 11, the inner side wall of the positioning assembly 1 is further provided with an avoidance groove 16, specifically, the avoidance groove 16 is disposed on the inner wall of the positioning main body 14, the avoidance groove 16 is semi-cylindrical and extends along the axial direction of the positioning assembly 1, and the avoidance groove 16 is used for avoiding the other end of the return pin 312, so as to provide a space for movement of the return pin 312.

In this embodiment, as shown in fig. 4, the inner side wall of the housing 21 is provided with a housing guide block 212, the side wall of the positioning main body 14 is provided with a housing guide groove, and the housing guide block 212 is slidably disposed in the housing guide groove, so as to be capable of guiding during the assembly process of the housing 21 and the positioning assembly 1.

When the positioning mechanism provided in this embodiment is used and needs to position the carrier assembly 2, the positioning mechanism is connected to an external air source, and air is filled into the air cavity 4 through the external air source, so as to push the movable member 31 to move upwards and drive the sliding block 32 to move inwards, that is, control the sliding block 32 to retract. Then, the shell 21 is clamped by a manipulator or a machine, the shell 21 is driven to move close to the positioning main body 14, the shell guide block 212 on the shell 21 is aligned with the guide groove, and then the shell 21 is controlled to move close to the positioning main body 14 along the axial direction of the positioning main body 14 (namely the axial direction of the shell 21) so as to be sleeved on the positioning main body 14, and the shell guide block 212 is positioned initially through a horn-shaped notch of the shell guide groove. As the housing 21 continues to move down, the housing guide block 212 slides into the lower section of the housing guide slot, while the positioning boss 22 is aligned with the positioning slot 12. When the vehicle continues to move, the positioning boss 22 is pressed into the positioning groove 12, and accurate positioning of the vehicle component 2 in the X direction and the Y direction is realized through the positioning boss 22. Then, the connection with an external air source is disconnected, so that the air in the air cavity 4 is discharged from the air inlet hole 5, at this time, under the action of elastic potential energy of the elastic piece 6, the sealing block 3113 and the piston 3112 are pushed to move away from the top wall of the positioning main body 14, in the moving process of the sealing block 3113 and the piston 3112, the sliding block 32 is pushed to slide in the sliding hole 13 through the contact surface 3111 of the piston module 311, and the sliding block 32 is enabled to move along the direction away from the piston 3112 until the sliding block 32 stretches into the inner pull ring 211 on the shell 21 and abuts against the pull ring 211, so that the limiting of the carrier assembly 2 and the positioning assembly 1 in the axial direction of the positioning assembly 1 is realized. When the carrier assembly 2 needs to be taken away, the external air source is connected again, and air is filled into the air cavity 4 through the external air source so as to push the movable piece 31 to move upwards, the return pin 312 drives the sliding block 32 to move inwards, that is, the sliding block 32 moves along the direction close to the piston 3112, so as to control the sliding block 32 to retract, and then the shell 21 is clamped by a mechanical arm or a machine and is driven to move away from the positioning main body 14.

The casing 21 provided in this embodiment is a closed casing structure, so that sundries can be effectively isolated from entering the casing 21 during processing, and further, entering the positioning groove 12 is prevented, and repeated positioning is facilitated.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. Positioning mechanism, its characterized in that includes:

the positioning assembly (1), the positioning assembly (1) is provided with an inner cavity (11), a positioning groove (12) and a sliding hole (13), the positioning groove (12) is formed in the top surface of the positioning assembly (1), and the sliding hole (13) is formed in the side wall of the positioning assembly (1) and is communicated with the inner cavity (11);

the carrier assembly (2) comprises a shell (21) at least sleeved outside part of the positioning assembly (1) and a positioning boss (22) fixedly connected to the top wall of the shell (21), wherein the positioning boss (22) is assembled in the positioning groove (12) in an interference manner, and an inner pull ring (211) is arranged on the inner side wall of the shell (21);

the locking assembly (3) comprises a movable piece (31) movably mounted in the inner cavity (11) and a sliding block (32) pushed by the movable piece (31) to slide in the sliding hole (13), and the sliding block (32) can be propped against the inner pull ring (211).

2. The positioning mechanism according to claim 1, further comprising an elastic member (6) located in the inner cavity (11), wherein one end of the elastic member (6) is abutted against the movable member (31), the other end of the elastic member (6) is abutted against the top wall of the positioning assembly (1), and the sliding block (32) is abutted against the inner pull ring (211) under the pushing of the elastic force of the elastic member (6).

3. The positioning mechanism according to claim 2, wherein the positioning assembly (1) comprises a positioning main body (14) and a base (15) connected with the positioning main body (14) in a sealing manner, the positioning groove (12) is formed in the top surface of the positioning main body (14), the sliding hole (13) is formed in the side wall of the positioning main body (14) in a surrounding manner, the inner cavity (11) is formed by the positioning main body (14) and the base (15) in a surrounding manner, an air cavity (4) is formed between the movable piece (31) and the base (15), the base (15) is provided with an air inlet hole (5) communicated with the air cavity (4), and air in the air cavity (4) can push the movable piece (31) to move in the axial direction of the positioning main body (14) so as to pull the sliding block (32) out of the inner pull ring (211) against the elastic force of the elastic piece (6).

4. A positioning mechanism according to claim 3, wherein the movable member (31) comprises a piston module (311) and a return pin (312) with one end fixedly connected to the piston module (311), one end of the sliding block (32) is provided with a first through hole (321), the return pin (312) is arranged in the first through hole (321) in a penetrating manner, the axis of the return pin (312) is intersected with the axis of the piston module (311), the air cavity (4) is formed between the piston module (311) and the base (15), and the sliding block (32) is driven to move by the piston module (311) through the return pin (312).

5. The positioning mechanism according to claim 4, wherein the piston module (311) has a contact surface (3111) disposed obliquely, the sliding hole (13) is an oblique hole, and an axis of the sliding hole (13) is perpendicular to a plane on which the contact surface (3111) is located, and the sliding block (32) can abut against the contact surface (3111).

6. The positioning mechanism according to claim 4, wherein the slide block (32) has a curved surface (322) for contacting the piston module (311) and being disposed obliquely, the first through hole (321) is an oblique hole, and an oblique angle of the curved surface (322) is 1.5 to 2.5 degrees larger than an oblique angle of the first through hole (321).

7. The positioning mechanism according to claim 4, wherein the piston module (311) comprises a piston (3112) and a sealing block (3113) fixedly connected to the bottom end of the piston (3112), a limiting groove (3114) and an inclined hole (3115) communicating with the limiting groove (3114) are formed on the surface of the piston (3112) facing the sealing block (3113), the return pin (312) comprises a head (3121) and a rod (3122) connected to the head (3121), the head (3121) is limited in the limiting groove (3114) and abuts against the sealing block (3113), the rod (3122) is arranged in the inclined hole (3115) and the first through hole (321), and the air cavity (4) is formed between the sealing block (3113) and the base (15).

8. The positioning mechanism of claim 7, further comprising a first seal (7), a second seal (8) and a third seal (9), the first seal (7) being sealingly mounted between the base (15) and the positioning assembly (1), the second seal (8) being sealingly mounted between a seal block (3113) and a side wall of the positioning assembly (1), the third seal (9) being sealingly mounted between the seal block (3113) and the piston (3112), and a distance between the third seal (9) and a side wall of the positioning assembly (1) being smaller than a distance between the head (3121) and a side wall of the positioning assembly (1).

9. Positioning mechanism according to claim 7, characterized in that in both the side wall of the piston (3112) and the inner side wall of the positioning assembly (1), one is provided with a piston guide slot (3116) and the other is provided with a piston guide block (17) matching the piston guide slot (3116), the piston guide block (17) being slidingly arranged in the piston guide slot (3116).

10. The positioning mechanism according to claim 4, wherein the inner side wall of the positioning assembly (1) is further provided with an avoidance groove (16), the avoidance groove (16) is semi-cylindrical and extends along the axial direction of the positioning assembly (1), and the avoidance groove (16) is used for avoiding the other end of the return pin (312).

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