CN220993186U

CN220993186U - High-precision positioning and clamping device

Info

Publication number: CN220993186U
Application number: CN202322593296.XU
Authority: CN
Inventors: 张文; 张鹏; 彭远仪
Original assignee: Shanghai Dongxin Biomedical Technology Co ltd
Current assignee: Shanghai Dongxin Biomedical Technology Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-05-24
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses a high-precision positioning and clamping device, which comprises: the locking device comprises a fixed seat, a locking hand wheel, a positioning seat and a plurality of locking ejector rods, wherein the positioning seat is fixedly connected to the fixed seat, and the locking hand wheel is sleeved on the positioning seat and is in threaded connection with each other; the top of the positioning seat is axially provided with positioning holes for placing products, and a plurality of locking ejector rods are rotatably arranged on the positioning seat and are distributed at intervals in a ring shape around the periphery of the positioning holes; the locking hand wheel is located the below of a plurality of locking ejector pins, and the locking hand wheel can promote a plurality of locking ejector pins to rotate when rotating and upwards moving to make a plurality of locking ejector pins all centre gripping on the product. The utility model has the advantages of simple and convenient positioning operation on the product, high position precision assurance, difficult damage to the product, low requirement on the machining precision of each part in the positioning and clamping device and easy machining.

Description

High-precision positioning and clamping device

Technical Field

The utility model relates to the technical field of clamps, in particular to a high-precision positioning and clamping device.

Background

The ventricular assist device is used for partially or completely replacing heart of heart failure patient to convey blood, the part implanted in human body is a blood pump, the inlet end of the blood pump is connected with the left ventricle part of the apex of heart, and the outlet end is connected with the aorta through an artificial blood vessel. When the blood pump runs, the impeller is driven to rotate by the driving rotor, so that blood is pumped from the left ventricle through the blood pump and the artificial blood vessel to the aorta, and the blood circulation is assisted. The casing of the blood pump is usually made of titanium alloy, and before leaving the factory, marks are required to be made on the bottom of the casing of the blood pump by laser, and the marks are generally required to be fixed and positioned by means of a clamp.

At present, the common clamp is used for clamping and positioning through interference fit with a pump cavity of a blood pump so as to realize a laser marking process. Because the blood pump is a medical instrument implanted into a human body, the quality requirement of the blood pump is extremely severe, and therefore, the damage is not allowed, and the existing clamping and positioning mode is obviously easy to cause the blood pump to scratch or scratch; in addition, the existing clamping and positioning mode has high requirements on the processing precision of the clamp, and because of processing errors, individual parts are not matched properly, marking work can not be completed smoothly or positioning precision is reduced, and the workload for clamping is high. Accordingly, there is a need for improvements in the art that overcome the shortcomings of the prior art.

Disclosure of Invention

The utility model aims to solve the problem of providing a high-precision positioning and clamping device so as to overcome the defects of high processing precision requirement, low positioning precision, easiness in damaging products and inconvenience in operation of the existing clamp.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a high precision positioning and clamping device, comprising: the locking device comprises a fixed seat, a locking hand wheel, a positioning seat and a plurality of locking ejector rods, wherein the positioning seat is fixedly connected to the fixed seat, and the locking hand wheel is sleeved on the positioning seat and is in threaded connection with each other; the top of the positioning seat is axially provided with positioning holes for placing products, and a plurality of locking ejector rods are rotatably arranged on the positioning seat and are distributed at intervals in a ring shape around the periphery of the positioning holes; the locking hand wheel is located below the locking ejector rods, and the locking hand wheel can push the locking ejector rods to rotate when rotating and moving upwards, so that the locking ejector rods are clamped on a product.

As a further improvement of the utility model, the locking ejector rod is provided with an ejector rod section and a clamping section which is formed by obliquely extending from the upper end of the ejector rod section towards the axial direction of the positioning seat, and the locking hand wheel drives the clamping section to lean against a product by pushing the ejector rod section.

As a further improvement of the utility model, the top of the positioning seat is provided with an annular boss, the annular boss is radially provided with a plurality of mounting grooves, the plurality of mounting grooves are distributed at intervals in an annular shape and are communicated with the positioning holes, and a plurality of locking ejector rods are respectively and rotatably arranged in the corresponding mounting grooves through pin shafts; in a free state, the locking ejector rod is subjected to self gravity so that the end part of the clamping section is positioned outside the positioning hole.

As a further improvement of the utility model, the locking hand wheel is provided with a conical body, and the diameter of the outer conical surface of the conical body is gradually reduced from bottom to top and is used for pushing the locking ejector rods to synchronously rotate.

As a further improvement of the utility model, the locking hand wheel is also provided with a hand wheel part which is integrally connected with the bottom of the conical body and is used for holding.

As a further improvement of the utility model, the positioning seat is sequentially provided with a limiting ring, a first threaded part and a second threaded part, the outer diameter of which is gradually increased from bottom to top, the limiting ring is matched and inserted into the inner hole of the fixed seat, the first threaded part is in threaded connection with a fixed disc, the fixed disc is fixedly connected with a flange part arranged at the top of the fixed seat, and the locking hand wheel is in threaded connection with the second threaded part.

As a further improvement of the present utility model, one of the fixing plate and the flange portion is provided with an arc-shaped waist-shaped hole, and the other is provided with a fixing hole opposite to the waist-shaped hole, and the fixing plate and the flange portion are fixedly connected with each other in the waist-shaped hole and the fixing hole by using bolts.

As a further improvement of the utility model, the top of the positioning seat is vertically provided with a positioning rod.

As a further improvement of the utility model, the locking ejector rods are all made of nonmetallic materials.

The beneficial effects of the utility model are as follows: the utility model provides a high-precision positioning and clamping device, which is characterized in that a plurality of locking ejector rods which are annularly and alternately distributed are rotatably arranged on a positioning seat, and the locking ejector rods are driven to rotate only by rotating a locking hand wheel, so that the positioning of a product can be finished, the operation is very simple and convenient, the plurality of locking ejector rods can be enabled to compress the same amplitude of the product, the higher position precision is ensured, the product is not easy to damage, and meanwhile, the technical scheme has low requirements on the machining precision of each part in the positioning and clamping device and is easy to machine.

Drawings

FIG. 1 is a perspective view of a high precision positioning and clamping device of the present utility model;

FIG. 2 is a cross-sectional view of a high precision positioning and clamping device of the present utility model;

FIG. 3 is an exploded view of the high precision positioning and clamping device of the present utility model;

FIG. 4 is a perspective view of a high precision positioning and clamping device and a product of the present utility model;

Fig. 5 is a perspective view of the high-precision positioning and clamping device of the present utility model after the product clamping process is completed.

The following description is made with reference to the accompanying drawings:

1. A fixing seat; 101. an inner bore; 102. a flange portion; 103. a waist-shaped hole; 2. locking a hand wheel; 201. a cone; 202. a hand wheel part; 3. a positioning seat; 301. positioning holes; 302. an annular boss; 3021. a mounting groove; 303. a limiting ring; 304. a first threaded portion; 305. a second threaded portion; 4. locking the ejector rod; 401. a ram section; 402. a clamping section; 5. a pin shaft; 6. a fixed plate; 601. a fixing hole; 7. a positioning rod; 100. and (5) a product.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present utility model provides a high-precision positioning and clamping device, which can be used for a laser marking platform, and includes: the locking device comprises a fixed seat 1, a locking hand wheel 2, a positioning seat 3 and a plurality of locking ejector rods 4.

The fixing seat 1 is hollow cylindrical, and a flange plate is arranged at the bottom of the fixing seat and is used for being fixed on an external laser marking machine platform by using bolts.

The positioning seat 3 is also hollow cylindrical and is coaxially and fixedly connected to the top of the fixing seat 1. The top of the positioning seat 3 is provided with a positioning hole 301 along the axial direction, as shown in fig. 1 and 4, the positioning hole 301 is specifically a stepped hole with a large upper section aperture and a small lower section aperture, which is matched with the shape of the product 100 to be clamped, so as to be used for placing the product 100. The product 100 in this embodiment is specifically referred to as a blood pump.

The locking hand wheel 2 is in threaded sleeve connection with the positioning seat 3, and the locking hand wheel 2 is in threaded connection with the positioning seat 3, so that the locking hand wheel 2 can move up and down on the positioning seat 3 when rotating.

The locking ejector rods 4 are rotatably arranged on the positioning seat 3 and distributed at equal intervals in a ring shape around the periphery of the positioning hole 301. The locking hand wheel 2 is located below the locking ejector rods 4, and when the locking hand wheel 2 rotates and moves upwards, the locking hand wheel 2 can push the locking ejector rods 4 to rotate synchronously, so that the locking ejector rods 4 are clamped on the product 100, and the product 100 is fixed. According to the utility model, after the product 100 is placed in the positioning hole 301 by adopting the technical scheme, the locking hand wheel 2 is rotated to drive the locking ejector rods 4 to rotate, so that the product 100 can be positioned, the operation is very simple and convenient, the annularly distributed locking ejector rods 4 synchronously clamp the product 100, the compaction amplitude is the same, the higher position precision can be ensured, the product 100 is not easily damaged, and meanwhile, the requirement on the machining precision of each part in the positioning and clamping device is low, and the processing is easy.

In this embodiment, the locking jack 4 is preferably provided in three.

Optionally, 4 to 8 locking ejector rods 4 are arranged.

Referring to fig. 2 and 3, the locking ejector rod 4 is provided with an ejector rod section 401 and a clamping section 402 extending obliquely upwards from the upper end of the ejector rod section 401 towards the axis direction of the positioning seat 3, and the locking hand wheel 2 drives the clamping section 402 to abut against the product 100 by pushing the ejector rod section 401.

Specifically, the ejector pin section 401 and the clamping section 402 are distributed at an obtuse angle.

Further, an annular boss 302 is radially disposed on the top outer circumference of the positioning seat 3, three mounting grooves 3021 are radially disposed on the annular boss 302, and the three mounting grooves 3021 are distributed at intervals in an annular shape and are all communicated with the positioning hole 301. The clamping sections 402 of the three locking rams 4 are each rotatably mounted in a corresponding mounting groove 3021 by means of a pin 5. In a free state, that is, when the three locking ejector rods 4 are not in contact with the locking hand wheel 2, the three locking ejector rods 4 are subjected to self gravity so that the three clamping sections 402 are in an everting and opening state, and the end parts of the clamping sections 402 are positioned outside the positioning holes 301.

Furthermore, the locking hand wheel 2 is provided with a conical body 201, and the diameter of the outer conical surface of the conical body 201 is gradually reduced from bottom to top, so as to push the locking ejector rods 4 to synchronously rotate. The bottoms of the three ejector rod sections 401 are respectively provided with a rounding towards the conical body 201, and are used for being matched with the conical body 201 to improve stability.

In addition, the locking hand wheel 2 is also provided with a quincuncial hand wheel part 202 which is integrally connected to the bottom of the cone 201 and is used for holding.

When the hand-held hand wheel part 202 rotates the locking hand wheel 2 towards one direction and enables the locking hand wheel 2 to move upwards, the three ejector rod sections 401 are synchronously jacked in the process of upwards moving the conical body 201, and the three ejector rod sections 401 drive the three clamping sections 402 to rotate inwards, so that the three clamping sections 402 can abut against the periphery of the product 100, and the clamping and positioning functions are realized.

It should be noted that, the locking ejector rods 4 are all made of non-metal materials, for example, are integrally injection molded from plastics, so that scratches or scratches on the product 100 can be effectively avoided.

The high-precision positioning and clamping device also comprises a positioning rod 7, wherein the positioning rod 7 is fixedly arranged at the top of the positioning seat 3 along the vertical direction and is positioned at the outer side of the positioning hole 301, and after the product 100 is placed in the positioning hole 301, the product 100 is rotated before clamping, so that the local structure on the product 100 is abutted against the positioning rod 7, and the marking consistency of the product 100 is ensured.

With continued reference to fig. 2 and 3, the positioning seat 3 is sequentially provided with a limiting ring 303, a first threaded portion 304 and a second threaded portion 305, wherein the outer diameter of the limiting ring is gradually increased from bottom to top, and the second threaded portion 305 is in threaded connection with the locking hand wheel 2. The limiting ring 303 is inserted into the inner hole 101 of the fixed seat 1 in a matched manner so as to realize preliminary installation alignment of the positioning seat 3 and the fixed seat 1. The positioning seat 3 is in threaded connection with the fixing disc 6 on the first threaded portion 304, the top of the fixing seat 1 is provided with a flange portion 102, the flange portion 102 is supported on the bottom surface of the fixing disc 6, and bolts (not shown in the figure) are used for fixing the positioning seat 3 and the fixing seat 1, so that the fixed installation of the positioning seat 3 and the fixing seat 1 is realized.

Wherein one of the fixing disk 6 and the flange portion 102 is provided with an arc-shaped waist-shaped hole 103, and the other is provided with a fixing hole 601 opposite to the waist-shaped hole 103. In this embodiment, specifically, two waist-shaped holes 103 are symmetrically arranged on the flange portion 102, two fixing holes 601 are symmetrically arranged on the fixing disc 6, the fixing disc 6 and the flange portion 102 are fixedly connected with each other by bolts in the two waist-shaped holes 103 and the two fixing holes 601 in a one-to-one correspondence manner, and the two fixing holes are circumferentially adjustable by loosening the bolts.

When the positioning and clamping device is used for the first time, the positions of the fixed disc 6 and the positioning seat 3 are circumferentially adjusted by loosening bolts through the waist-shaped holes 103 on the flange part 102, and the angle of the product 100 is adjusted by combining the positioning rod 7, so that the marking position requirement is met, and the consistency is maintained.

The operation process of the utility model is as follows:

After the fixing seat 1 is fixed with the laser marking machine platform, as shown in fig. 4, the product 100 is put into the positioning hole 301 of the positioning seat 3 from top to bottom, and then the product 100 is rotated to lean against the positioning rod 7; at this time, the three locking ejector rods 4 are in a relaxed state under the action of gravity leverage; then the locking hand wheel 2 is rotated in the right direction, so that the conical body 201 rises along the threads and simultaneously jacks up the three locking ejector rods 4 to clamp the product 100, and clamping and positioning are realized; then performing marking operation, and marking the bottom surface of the shell of the product 100 as shown in fig. 5; finally, the locking hand wheel 2 is rotated leftwards to loosen the product 100, and the product 100 after marking is removed; the foregoing is repeated to position and mark other products 100.

Therefore, the high-precision positioning and clamping device provided by the utility model has the advantages that the plurality of locking ejector rods 4 which are annularly and alternately distributed are rotatably arranged on the positioning seat 3, the locking ejector rods 4 are driven to rotate only by rotating the locking hand wheel 2, the positioning of the product 100 can be finished, the operation is very simple and convenient, the plurality of locking ejector rods 4 can be enabled to press the product 100 in the same amplitude, the higher position precision is ensured, the product 100 is not easy to damage, and meanwhile, the processing precision requirement on each part in the positioning and clamping device is low and the processing is easy.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims

1. A high precision positioning and clamping device, comprising: the locking device comprises a fixing seat (1), a locking hand wheel (2), a positioning seat (3) and a plurality of locking ejector rods (4), wherein the positioning seat (3) is fixedly connected to the fixing seat (1), and the locking hand wheel (2) is sleeved on the positioning seat (3) and is in threaded connection with each other; the top of the positioning seat (3) is axially provided with positioning holes (301) for placing products (100), and a plurality of locking ejector rods (4) are rotatably arranged on the positioning seat (3) and are distributed at intervals in a ring shape around the periphery of the positioning holes (301); the locking hand wheel (2) is located below the locking ejector rods (4), and the locking hand wheel (2) can push the locking ejector rods (4) to rotate when performing rotary motion and moving upwards, so that the locking ejector rods (4) are clamped on a product (100).

2. The high precision positioning and clamping device as claimed in claim 1, wherein: the locking ejector rod (4) is provided with an ejector rod section (401) and a clamping section (402) which is formed by obliquely extending from the upper end of the ejector rod section (401) towards the axial direction of the positioning seat (3), and the locking hand wheel (2) drives the clamping section (402) to lean against the product (100) by pushing the ejector rod section (401).

3. The high precision positioning and clamping device as claimed in claim 2, wherein: the top of the positioning seat (3) is provided with an annular boss (302), the annular boss (302) is radially provided with a plurality of mounting grooves (3021), the plurality of mounting grooves (3021) are distributed at intervals in an annular mode and are communicated with the positioning holes (301), and the plurality of locking ejector rods (4) are respectively rotatably mounted in the corresponding mounting grooves (3021) through pin shafts (5); in the free state, the locking plunger (4) is under the action of self-gravity so that the end of the clamping section (402) is positioned outside the positioning hole (301).

4. The high precision positioning and clamping device as claimed in claim 1, wherein: the locking hand wheel (2) is provided with a conical body (201), and the diameter of the outer conical surface of the conical body (201) is gradually reduced from bottom to top and is used for pushing the locking ejector rods (4) to synchronously rotate.

5. The high precision positioning and clamping device as claimed in claim 4, wherein: the locking hand wheel (2) is also provided with a hand wheel part (202) which is integrally connected with the bottom of the conical body (201) and is used for holding.

6. The high precision positioning and clamping device as claimed in claim 1, wherein: the locating seat (3) is sequentially provided with a limiting ring (303), a first threaded portion (304) and a second threaded portion (305) with gradually increased outer diameters from bottom to top, the limiting ring (303) is matched and inserted into an inner hole (101) of the fixing seat (1), a fixing disc (6) is connected to the first threaded portion (304) in a threaded mode, the fixing disc (6) is fixedly connected to a flange portion (102) arranged at the top of the fixing seat (1), and the locking hand wheel (2) is connected to the second threaded portion (305) in a threaded mode.

7. The high precision positioning and clamping device as claimed in claim 6, wherein: one of the fixing disc (6) and the flange part (102) is provided with an arc-shaped waist-shaped hole (103), and the other is provided with a fixing hole (601) opposite to the waist-shaped hole (103), and the fixing disc (6) and the flange part (102) are fixedly connected in the waist-shaped hole (103) and the fixing hole (601) by bolts.

8. The high precision positioning and clamping device as claimed in claim 1, wherein: the top of the positioning seat (3) is vertically provided with a positioning rod (7).

9. The high precision positioning and clamping device as claimed in claim 1, wherein: the locking ejector rods (4) are made of nonmetal materials.