CN111872844A

CN111872844A - Z-axis structure

Info

Publication number: CN111872844A
Application number: CN202010849607.2A
Authority: CN
Inventors: 赵光树; 刘兴兵; 朱天财; 韦雄祥; 何明建; 刘国平
Original assignee: Shenzhen Jianxing Automation Equipment Co ltd
Current assignee: Shenzhen Jianxing Automation Equipment Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2020-11-03

Abstract

The invention discloses a Z-axis structure, and relates to the field of lens grinding. This Z axle construction includes: a first substrate (1); a second base (2) mounted on the first base and movable relative to the first base in the Z-axis direction; a linear motion mechanism (6) mounted on the second base and capable of moving relative to the second base in the Z-axis direction; a thimble (4) mounted at the front end of the linear motion mechanism; a clamp (3) suspended at the front end of the thimble; the positioning piece (5) is arranged on the linear motion mechanism and used for containing and positioning the clamp when the clamp is pulled up; a gas path mechanism (7); a first power mechanism (8) for driving the linear motion mechanism; and a second power mechanism (9) for driving the second base body to move. This Z axle construction collects thimble, anchor clamps setting element, gas circuit mechanism and power unit in an organic whole, can improve lens grinding machining efficiency and yields.

Description

Z-axis structure

Technical Field

The invention relates to the field of lens grinding processing, in particular to a Z-axis structure of lens grinding equipment.

Background

Under the conditions of rapid increase of manpower cost and rapid development of the optical industry, the processing yield and efficiency become powerful competitive indexes in the field of finish machining of lens lenses.

At present, the concave lens grinding process adopts a manual material taking and placing mode to produce, materials are firstly placed into a clamp, the clamp and the materials are integrally placed into a grinding station, an ejector pin is lifted up and then pressed to the clamp, the action needs manual operation with both hands, attention is highly concentrated, and the action is very complicated. These result in poor yield and processing efficiency in lens grinding processing.

Disclosure of Invention

The present invention is directed to a Z-axis structure to solve the above-mentioned problems of the related art.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a Z-axis structure, comprising: a first substrate (1); a second base body (2) mounted on the first base body (1) and capable of moving relative to the first base body (1) along the Z-axis direction; a linear motion mechanism (6) which is mounted on the second base body (2) and can move relative to the second base body (2) along the Z-axis direction; the thimble (4) is arranged at the front end of the linear motion mechanism (6); the clamp (3) is suspended at the front end of the thimble (4); the positioning piece (5) is arranged on the linear motion mechanism (6) and used for containing and positioning the clamp (3) when the clamp (3) is pulled up; the air path mechanism (7) is connected with the lens accommodating cavity (32) of the clamp (3); a first power mechanism (8) for driving the linear motion mechanism (6); and a second power mechanism (9) for driving the second base body (2) to move.

Preferably, the power input part of the linear motion mechanism (6) and the power output part of the first power mechanism (8) are connected through a floating joint (81).

Preferably, the air passage mechanism (7) includes: a first air channel (71) arranged inside the clamp (3); the second air channel (72) is arranged in the thimble (4); a third air passage (73) arranged in the linear motion mechanism (6); and an air path joint (74) arranged on the linear motion mechanism (6).

Preferably, said first air duct (71) inside the clamp (3) comprises: a first air hole (711) arranged in the center of the bottom of the lens accommodating cavity (32); a plurality of second air holes (713) provided on the outer periphery of the needle groove (33); and a plurality of third air holes (712) provided at the bottom of the needle groove (33) for communicating the first air holes (711) and the second air holes (713).

Preferably, the clamp (3) comprises: a first body (35) made of a first material having said first air passage (71); and a rigid member (36) made of a second material and having a needle groove (33) and fixedly mounted on the center of the back of the first body (35).

Preferably, the thimble (4) comprises: a second body (42) having the second air passage (72); and a needle tip (41) fixedly mounted on the front end of the second body (42); the second air channel (72) in the ejector pin (4) is provided with a plurality of outlets which are uniformly distributed on a circumference which takes the central shaft of the ejector pin (4) as the center of a circle.

Preferably, the back of the clamp (3) is provided with a connecting cover (31), the tail end of the inner part of the connecting cover (31) is provided with an inner conical surface (34), the ejector pin (4) is provided with an outer conical surface (43) corresponding to the inner conical surface (34), the outer conical surface (43) is matched with the inner conical surface (34), and the clamp (3) is suspended at the front end of the ejector pin (4).

Preferably, the linear motion mechanism (6) comprises: a sleeve (61) fixed to the second base body (2); and an inner rod (62) which is arranged in the sleeve (61) and is matched with the sleeve (61) in a sliding way; and a third air passage (73) is arranged inside the inner rod (62).

Preferably, the second substrate (2) and the first substrate (1) are plate bodies which are parallel to each other; the second power mechanism (9) is arranged on one side of the first base body (1) far away from the second base body (2), and a power output part of the second power mechanism (9) is connected with the second base body (2) through a supporting plate (91); the first power mechanism (8) is positioned on one side of the second base body (2) far away from the first base body (1).

Preferably, the Z-axis structure further comprises: a first limit sensor for controlling a lifting end point of the second substrate; and a second limit sensor for controlling a descending end point of the second substrate.

Compared with the prior art, the invention has at least the following beneficial effects:

this Z axle construction collects thimble, anchor clamps setting element, gas circuit mechanism and power unit in an organic whole, can drive thimble and anchor clamps and switch between grinding state and last unloading state, can realize the automatic unloading and the grinding of going up of lens, can improve lens grinding machining efficiency and yields.

Drawings

FIG. 1 is a perspective view of a Z-axis configuration;

FIG. 2 is a side view thereof;

FIG. 3 is a combined structure diagram of the linear motion mechanism, the positioning member, the thimble and the clamp;

FIG. 4 is a schematic view of the combination of the clamp and the thimble;

FIG. 5 is a diagram illustrating the positioning member, the thimble, and the clamp in a grinding state;

FIG. 6 is a diagram showing the positioning element, the thimble and the clamp in a loading/unloading state;

FIG. 7 is a schematic structural view of an embodiment of a thimble;

FIG. 8 is a schematic structural view of another embodiment of a thimble;

FIG. 9 is a schematic structural view of one embodiment of a clamp;

FIG. 10 is a schematic view of the structure of the air passages in the fixture;

reference numerals:

1. a first substrate;

2. a second substrate;

3. a clamp;

31. a connecting cover; 32. a lens housing cavity; 33. a needle groove; 34. an inner conical surface; 35. a first body; 36. a rigid member;

4. a thimble; 41. a needle tip; 42. a second body; 43. an outer conical surface;

5. a positioning member;

6. a linear motion mechanism;

61. a sleeve; 62. an inner rod;

7. a gas circuit mechanism;

71. a first air passage; 72. a second air passage; 73. a third air passage; 74. a gas circuit joint; 711. a first air hole; 712. a third air hole; 713. a second air hole;

8. a first power mechanism;

81. a floating joint;

9. a second power mechanism;

91. and (7) a supporting plate.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Referring to fig. 1-10, the Z-axis structure includes: the device comprises a first base body 1, a second base body 2, a linear motion mechanism 6, a thimble 4, a clamp 3, a positioning piece 5, an air path mechanism 7, a first power mechanism 8 and a second power mechanism 9.

The first base body 1 and the second base body 2 are specifically plate bodies which are arranged in parallel and combined together through a linear guide mechanism consisting of a sliding block and a sliding rail, so that the second base body 2 can move relative to the first base body 1 along the Z-axis direction, namely the up-down direction in fig. 2.

The linear motion mechanism 6 is mounted on the second base 2 so as to be movable relative to the second base 2 in the Z-axis direction, i.e., the up-down direction in fig. 2. With reference to fig. 1 and 3, the linear motion mechanism 6 specifically includes a sleeve 61 and an inner rod 62, the sleeve 61 is fixedly mounted on the second substrate 2, the inner rod 62 is slidably fitted with the sleeve 61, and a third air passage 73 is further disposed inside the inner rod 62.

Referring to fig. 3, the thimble 4 is screwed to the front end of the inner rod 62, and a second air passage 72 is further provided inside the thimble 4.

Referring to fig. 3 and 4, the clamp 3 is suspended at the front end of the thimble 4. In this embodiment, the clamp 3 is suspended at the front end of the thimble 4 through a connecting cover 31. Specifically, the front end of the connecting cover 31 is tightly fitted with the back of the fixture 3, the end inside the connecting cover 31 is provided with an inner conical surface 34, the ejector pin 4 is provided with an outer conical surface 43 corresponding to the inner conical surface 34, and the outer conical surface 43 is matched with the inner conical surface 34 to suspend the fixture 3 at the front end of the ejector pin 4. A first air passage 71 is also provided inside the jig 3.

Referring to fig. 3, 4, 5 and 6, the positioning member 5 is fixedly installed at the front end of the sleeve 61 of the linear motion mechanism 6, and when the clamp 3 is pulled by the thimble 4, the connecting cover 31 enters the positioning member 5 (see fig. 6), so as to keep the clamp 3 at the current position. The inner conical surface 34 of the connecting cover 31 is matched with the outer conical surface 43 of the thimble 4, so that the connecting cover 31 can smoothly enter the positioning piece 5 in the positioning process, and the reliability is better.

With reference to fig. 1, 3, and 4, the first air channel 71, the second air channel 72, and the third air channel 73 form the air channel mechanism 7, which is used for introducing negative air pressure into the lens accommodating cavity 32 of the fixture 3 when the fixture 3 picks up the lens (i.e., loading), introducing positive air pressure into the lens accommodating cavity 32 of the fixture 3 when the fixture 3 releases the lens (i.e., unloading), and the linear motion mechanism 6 is further provided with an air channel joint 74 for connecting the first air channel 71 to an external air source. In the air path mechanism 7, the difficulty of supplying air to the floating (suspended at the front end of the thimble 4) clamp 3 is effectively solved through the built-in air path of the thimble 4, the built-in air path of the clamp 3 and the built-in air path of the linear motion mechanism 6. The inner conical surface 34 of the connecting cover 31 and the outer conical surface 43 of the thimble 4 cooperate to seal the air passage.

Referring to fig. 1 and 2, the first power mechanism 8 is mounted on the second base 2, and a power output portion of the first power mechanism 8 is connected to a power input portion of the linear motion mechanism 6, that is, the end of the inner rod 62 of the linear motion mechanism 6. Further, the power input part of the linear motion mechanism 6 is connected with the power output part of the first power mechanism 8 through the floating joint 81, so that the driving resistance caused by machining errors or assembly errors can be reduced, and the related mechanical wear can be reduced.

Referring to fig. 1 and 2, the second power mechanism 9 is mounted on the first base 1, and a power output portion thereof is connected to the second base 2 to drive the second base 2 to move integrally relative to the first base 1. In this embodiment, the second power mechanism 9 is a cylinder.

The working process of the Z-axis structure is as follows:

when the lens needs to be picked up, as shown in fig. 6, the first power mechanism 8 drives the thimble 4 to further pull the fixture 3 to be lifted, after the fixture 3 is lifted, the connecting cover 31 at the back of the fixture 3 is embedded into the positioning member 5, and is kept at the current position by the positioning member 5, negative air pressure is introduced into the air path mechanism 7, suction force is formed in the lens accommodating cavity 32 on the fixture 3, and the lens is sucked and kept in the lens accommodating cavity 32. The dashed lines in fig. 6 indicate the airflow paths.

After picking up the lens, the second power mechanism 9 drives the second substrate 2 to move, and drives the clamp 3, the thimble 4, the lens and the like to move to the grinding head together. Then, the first power mechanism 8 drives the thimble 4 to move downward, the thimble 4 is pushed into the needle groove 33 at the back of the clamp 3, the clamp 3 is pressed on the grinding head, at this time, the clamp 3 is separated from the positioning member 5, a certain gap is formed between the inner conical surface 34 and the outer conical surface 43, and the clamp 3 can swing within a certain range, as shown in fig. 5.

After the grinding is finished, the air path mechanism 7 is introduced with positive air pressure, and the lens accommodating cavity 32 on the clamp 3 forms blowing force to blow out the lens, so that the blanking is realized.

Therefore, the Z-axis structure integrates the ejector pin 4, the clamp 3, the clamp positioning piece 5, the air path mechanism 7 and the power mechanism, and can drive the ejector pin 4 and the clamp 3 to switch between a grinding state and a feeding and discharging state, so that automatic feeding and discharging and grinding control of the lens can be realized. Compare the unloading of current manual work, this Z axle construction can improve lens and grind machining efficiency and yields.

Figure 10 shows a preferred clamp 3. The first air passage 71 inside the jig 3 includes: a first air hole 711 provided in the center of the bottom of the lens housing chamber 32; a plurality of second air holes 713 formed at the outer circumference of the needle groove 33; and a plurality of third air holes 712 provided at the bottom of the needle groove 33 for communicating the first air holes 711 and the second air holes 713. The first air passage 71 is configured to keep the air passage outlet at the center of the lens housing chamber 32 while avoiding the needle groove 33, so that the first air passage can be applied to both a lens having a diameter larger than the diameter of the needle groove 33 and a lens having a diameter smaller than the diameter of the needle groove 33. More preferably, all the third air holes 712 are uniformly distributed on the circumference centering on the needle groove 33.

Referring to fig. 9, the clamp 3 is further formed by combining a first body 35 and a rigid member 36, the first body 35 is made of a relatively cheap material such as a common steel material, the rigid member 36 is made of a tungsten steel, a ceramic or other material with good wear resistance, the first air channel 71 is arranged on the first body 35, the needle groove 33 is arranged on the rigid member 36, and the rigid member 36 is tightly fitted at the center of the back of the first body 35. The clamp 3 has the characteristics of low cost and easiness in processing the air passage.

Fig. 7 shows a preferred thimble 4. This thimble 4 includes: a second body 42 having the second air passage; and a needle tip 41 fixedly mounted on the front end of the second body 42. That is, the thimble 4 has a combined structure, which can be manufactured by using a low-cost material, and the needle tip 41 is manufactured by using a high abrasion resistant material, so that the cost can be reduced, the air passage processing is easy, and only the needle tip 41 can be replaced when the needle tip 41 is abraded. In addition, the second air passage 72 inside the thimble 4 has a plurality of outlets, and the outlets are uniformly distributed on a circumference with the central axis of the thimble 4 as a center.

Fig. 8 shows another thimble 4. The needle rod and the needle tip 41 of the thimble 4 are integrally molded from the same material. The outlets of the air passages in the thimble 4 are distributed on opposite sides of the needle tip 41.

Referring to fig. 2, in this embodiment, the second substrate 2 and the first substrate 1 are plate bodies, and are parallel to each other; the second power mechanism 9 is mounted on one side of the first base body 1 far away from the second base body 2, and a power output part of the second power mechanism 9 is connected with the second base body 2 through a supporting plate 91; the first power mechanism 8 is located on one side of the second substrate 2 far away from the first substrate 1. The combined mode makes the Z-axis structure more compact, and is beneficial to miniaturization.

The Z-axis structure further comprises a first limit sensor for controlling the lifting terminal point of the second base body 2; and a second limit sensor for controlling a descending end point of the second base body 2.

The Z-axis structure is suitable for various lens grinding equipment, and is particularly suitable for an upper swinging machine.

The present invention has been described in detail with reference to the specific embodiments, and the detailed description is only for the purpose of helping those skilled in the art understand the present invention, and is not to be construed as limiting the scope of the present invention. Various modifications, equivalent changes, etc. made by those skilled in the art under the spirit of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Z-axis structure, comprising:

a first substrate (1);

a second base body (2) mounted on the first base body (1) and capable of moving relative to the first base body (1) along the Z-axis direction;

a linear motion mechanism (6) which is mounted on the second base body (2) and can move relative to the second base body (2) along the Z-axis direction;

the thimble (4) is arranged at the front end of the linear motion mechanism (6);

the clamp (3) is suspended at the front end of the thimble (4);

the positioning piece (5) is arranged on the linear motion mechanism (6) and used for containing and positioning the clamp (3) when the clamp (3) is pulled up;

the air path mechanism (7) is connected with the lens accommodating cavity (32) of the clamp (3);

a first power mechanism (8) for driving the linear motion mechanism (6); and

and the second power mechanism (9) is used for driving the second base body (2) to move.

2. The Z-axis structure according to claim 1, characterized in that the power input of the linear motion mechanism (6) and the power output of the first power mechanism (8) are connected by a floating joint (81).

3. The Z-axis structure according to claim 1, wherein the air path mechanism (7) includes:

a first air channel (71) arranged inside the clamp (3);

the second air channel (72) is arranged in the thimble (4);

a third air passage (73) arranged in the linear motion mechanism (6); and

and the air path joint (74) is arranged on the linear motion mechanism (6).

4. The Z-axis structure according to claim 3, wherein the first air passage (71) inside the jig (3) includes:

a first air hole (711) arranged in the center of the bottom of the lens accommodating cavity (32);

a plurality of second air holes (713) provided on the outer periphery of the needle groove (33); and

and a plurality of third air holes (712) which are arranged at the bottom of the needle groove (33) and are used for communicating the first air holes (711) with the second air holes (713).

5. The Z-axis structure according to claim 3, wherein the jig (3) comprises:

a first body (35) made of a first material having said first air passage (71); and

a rigid element (36) with a needle slot (33) made of a second material and fixed to the centre of the back of the first body (35).

6. The Z-axis structure according to claim 3, characterized in that the thimble (4) comprises:

a second body (42) having the second air passage (72); and

a needle tip (41) fixedly mounted at the front end of the second body (42);

the second air channel (72) in the ejector pin (4) is provided with a plurality of outlets which are uniformly distributed on a circumference which takes the central shaft of the ejector pin (4) as the center of a circle.

7. The Z-axis structure according to claim 1, characterized in that the back of the clamp (3) is provided with a connecting cover (31), the inner end of the connecting cover (31) is provided with an inner conical surface (34), the thimble (4) is provided with an outer conical surface (43) corresponding to the inner conical surface (34), and the outer conical surface (43) and the inner conical surface (34) are matched to suspend the clamp (3) at the front end of the thimble (4).

8. The Z-axis structure according to claim 1, wherein the linear motion mechanism (6) comprises:

a sleeve (61) fixed to the second base body (2); and

an inner rod (62) which is arranged in the sleeve (61) and is matched with the sleeve (61) in a sliding way;

and a third air passage (73) is arranged inside the inner rod (62).

9. The Z-axis structure according to claim 1, characterized in that the second base body (2) and the first base body (1) are plate bodies, which are parallel to each other; the second power mechanism (9) is arranged on one side of the first base body (1) far away from the second base body (2), and a power output part of the second power mechanism (9) is connected with the second base body (2) through a supporting plate (91); the first power mechanism (8) is positioned on one side of the second base body (2) far away from the first base body (1).

10. The Z-axis structure of claim 1, further comprising:

a first limit sensor for controlling a lifting end point of the second substrate; and

and the second limit sensor is used for controlling the descending terminal point of the second substrate.