CN214686437U

CN214686437U - Measuring instrument

Info

Publication number: CN214686437U
Application number: CN202120931013.6U
Authority: CN
Inventors: 余毅; 何锋赟; 徐志文; 梁敏华; 张雪鹏
Original assignee: Changguang Chuzhou High End Intelligent Equipment Research Institute
Current assignee: Changguang Chuzhou High End Intelligent Equipment Research Institute
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-12
Anticipated expiration: 2031-04-30

Abstract

The utility model belongs to the vision measurement field provides a measuring instrument, include: the device comprises a frame, a workbench, a base for fixing the workbench and a workbench lifting mechanism for driving the workbench to move up and down; at least two sliding blocks which are in sliding connection with the base are arranged on the periphery of the base, and the sliding blocks are fixedly connected with the rack; the workbench lifting mechanism is connected with the base and drives the workbench to move up and down along the direction vertical to the workbench. The utility model can realize the purpose of automatic focusing by installing the workbench lifting mechanism; small volume, compact structure and convenient transportation.

Description

Measuring instrument

Technical Field

The utility model belongs to the vision measurement field, concretely relates to measuring apparatu.

Background

The measuring instrument is used for imaging the outline of the part and measuring the size of the part. The general structure is that the upper part of the frame is provided with a lens and a ring-shaped light source, and the lower part of the workbench is provided with a parallel light source. For focusing, an up-down moving mechanism is mostly adopted to drive the lens in a vertical distance, but a workbench of the method is generally fixed and cannot finish focusing action, and a workpiece exceeds the working range of the lens and cannot be imaged clearly; and a few of the measuring instruments adopt a lifting measuring instrument for the workbench, the whole rack is of a stand column structure, and the workbench is supported unstably.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the measuring apparatu and can not focus and the unstable problem of workstation motion, provided a compact structure area focusing function's measuring apparatu. In order to achieve the above purpose, the utility model adopts the following specific technical scheme:

a surveying instrument, comprising:

the device comprises a frame, a workbench, a base for fixing the workbench and a workbench lifting mechanism for driving the workbench to move up and down;

at least two sliding blocks which are connected with the base in a sliding mode are arranged on the periphery of the base, and the sliding blocks are fixedly connected with the rack;

the workbench lifting mechanism is connected with the base and drives the workbench to move up and down along the direction vertical to the workbench.

Further, the base comprises a pair of square frames which fixedly support two sides of the workbench;

guide rails are arranged on the two support legs of each square frame;

the square frame is integrated in the first frame of the rack;

the whole first frame is of a table structure, and the sliding blocks are arranged at the corresponding positions of the four corners of the first frame;

the slider and the guide rail form the sliding connection.

Further, the workbench lifting mechanism comprises a motor and a ball screw;

the motor is arranged on the rack and connected with the ball screw through a transmission device;

the ball screw is arranged between the two support legs in parallel;

the two ends of the ball screw are rotatably supported by the rack, and the ball screw is provided with a nut block fixed on a square frame in a penetrating way.

Further, the motor is arranged vertically.

Furthermore, the transmission device comprises a first synchronizing wheel fixed at the bottom of the output end of the motor, a second synchronizing wheel fixed at the bottom of the ball screw, and a synchronous belt meshed with the first synchronizing wheel and the second synchronizing wheel.

Furthermore, an electromagnetic brake is arranged at one end, far away from the transmission device, of the ball screw.

Further, the device also comprises a lens and a light source;

the lens faces the workbench and is fixed on the frame;

the light source irradiates on the part to be measured on the workbench.

Further, the light source comprises an annular light source and a parallel light source, and the annular light source is positioned above the frame and sleeved below the lens;

the parallel light source is arranged below the frame and irradiates the workbench.

Further, the annular light source moves up and down along the direction vertical to the workbench by the driving of the annular light source lifting mechanism.

The utility model discloses can gain following technological effect:

1. the workbench is provided with the workbench lifting mechanism, so that focusing action can be realized, and clear imaging can be ensured if a workpiece exceeds the working range of the lens.

2. The base below the workbench is at least provided with two sliding blocks which are in sliding connection with the base, and the sliding blocks are fixedly connected with the rack. The whole measuring instrument has compact structure, small volume and more stable frame support.

Drawings

Fig. 1 is a schematic front view of a measuring instrument disclosed in the present invention;

FIG. 2 is a schematic structural view of the assembly of the work table and the work table lifting mechanism disclosed in the present invention;

fig. 3 is a schematic structural diagram of the frame disclosed in the present invention.

Reference numerals:

1. a lens; 2. a work table; 21. a square frame; 22. a guide rail; 23. a slider; 31. an annular light source; 32. an annular light source lifting mechanism; 41. a motor; 42. a ball screw; 43. a synchronous belt; 44. an electromagnetic brake; 45. a transverse plate; 221. a connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute limitations on the invention.

The utility model aims at providing a can focus and vertical small measuring apparatu again. The following will explain the measuring instrument provided by the present invention in detail by specific embodiments.

Fig. 1 shows the front view structure of the measuring instrument of the present invention, which mainly comprises a frame, a workbench 2, a base of the fixed workbench 2, and a workbench lifting mechanism for driving the workbench 2 to move up and down. The base is provided with at least two sliding blocks 23 which are connected with the base in a sliding way, and the sliding blocks 23 are fixedly connected with the rack. The workbench lifting mechanism is connected with the base and drives the workbench 2 to move up and down along the direction vertical to the workbench 2.

In this embodiment, come fixed work platform 2 by the base, the base is connected the frame through slider 23 all around, and when frame support work platform 2 like this, can prevent to rock. At least two sliders 23 slidably connected to the base are provided more smoothly than one slider 23. And the bottom of the base is connected with a workbench lifting mechanism which provides power for the workbench to move up and down.

In a preferred embodiment of the present invention, fig. 2 shows a work table and a work table lifting mechanism assembly structure disclosed in the present invention. The height direction of the rack is a Z axis, the length direction of the rack is a Y axis, and the width direction of the rack is an X axis. Two square frames 21 are fixedly connected to two sides of the X axis below the workbench 2 respectively, and four corners of the workbench 2 are supported by four supporting legs of the square frames 21. Each square frame 21 includes at least two legs and a connecting rod 21. Specifically, the bottoms of the two legs of the square frame 21 are connected by a connecting rod 221, and the connecting rod 221 and the two legs are U-shaped as a whole. Each leg of each square frame 21 is mounted with a guide rail 22.

In a preferred embodiment of the present invention, a first frame is disposed below the working platform 2, which is a table structure, and a through hole, preferably a square through hole, is disposed on the top surface, i.e. the center of the table top, so that two square frames 21 disposed below the working platform 2 are disposed inside the first frame. Four frame legs are fixed below the top surface for supporting. The four machine frame supporting legs are fixedly arranged on the bottom surface of the machine frame. The frame support leg is provided with a slide block 23 at a position corresponding to the guide rail 22, and the slide block 23 and the guide rail 22 are designed to facilitate the sliding connection of the workbench 2 and the first frame. Therefore, the workpiece table 2 can be ensured to be more stable in the process of moving along the Z-axis direction, the shaking of the X-axis and the Y-axis caused by gaps is reduced, and the orthogonality is improved.

In a preferred embodiment of the present invention, the table lifting mechanism comprises a motor 41 and a ball screw 42, and the motor 41 and the ball screw 42 are connected through a transmission device. The ball screw 42 penetrates through a nut block fixed at the middle position of the Y axis of the connecting rod 221 of the square frame 21 and forms a single-screw pair structure with the square frame 21. The motor 41 is used as a power source, so that the focusing efficiency is high. The slider 23 and the guide rail 22 can absorb a certain lateral force, and absorb a moment along the Y axis generated by the inability of the ball screw 42 to be attached to the center of the table 2. Both ends of the ball screw 42 are rotatably supported by the first frame. When the ball screw 42 is installed, two transverse plates 45 are fixedly connected to the upper and lower ends of the first frame in the Z-axis direction, and each transverse plate 45 is rotatably connected to the ball screw 42 by a mechanical common means such as a bearing. Ensuring smoother movement of the ball screw 42.

In a preferred embodiment of the present invention, the motor 41 is vertically arranged.

In a preferred embodiment of the present invention, the transmission device includes a first synchronizing wheel fixed to the bottom of the output end of the motor 41, a second synchronizing wheel fixed to the bottom of the ball screw 42, and a timing belt 43 engaged with both the first synchronizing wheel and the second synchronizing wheel. The transmission device serves to transmit the power source of the motor 41 to the ball screw 42, the first and second synchronizing wheels may adopt a belt pulley structure, and the timing belt 43 adopts a corresponding belt link structure. The transmission device is a common technical means in the mechanical field, and is not described herein in detail.

In a preferred embodiment of the present invention, an electromagnetic brake 44 is further included, which is disposed at an end of the ball screw 42 away from the transmission. The connecting rod 221 is prevented from being disengaged from the ball screw 42 when moving upward.

In a preferred embodiment of the present invention, the device further comprises a lens 1 and a light source, wherein the lens 1 faces the worktable 2 and is fixed above the frame. The light source irradiates the part to be measured on the worktable 2.

In a preferred embodiment of the present invention, the light source includes an annular light source 31 and a parallel light source, the annular light source 31 is located above the frame and sleeved below the lens; the parallel light source is fixedly arranged on the first frame and irradiates the bottom of the workbench 2. The parallel light source and the workbench 2 use the same installation foundation, and the verticality between the light emitted by the parallel light source and the workbench 2 is ensured.

The ring light source 31 can be vertically moved up and down by the driving of the ring light source elevating mechanism 32. The annular light source lifting mechanism 32 is a conventional lifting mechanism in the field, and can refer to a common lifting means in the mechanical field, which is not described herein. The installation of the collimated light source belongs to the prior art, and is not described herein.

In some embodiments, lens 1 is a double telecentric lens.

In a preferred embodiment of the present invention, fig. 3 shows a structure of the rack disclosed in the present invention, and the rack of this embodiment is wholly L-shaped, and includes a third frame and a second frame which are correspondingly arranged from top to bottom, and a first frame which is adjacent to the second frame along the Y-axis. The motor 41 is vertically arranged and placed in the second frame.

In this embodiment, the worktable 2 is driven by a motor, the worktable 2 is driven to move in the vertical direction through a path of the motor, the synchronizing wheel and the ball screw, and the worktable 2 can perform linkage of an image and a servo motor to achieve the purpose of automatic focusing. The closer the ball screw 42 is to the center of the entire table 2, the smaller the moment generated during the transmission, and this mounting manner avoids the moment around the X-axis generated during the driving. The traditional equipment with the workbench lifter positioned below the workbench has the defects of high gravity center, small area of a mounting base, easy instability of the whole equipment or heavy structure caused by the instability. And the novel workbench lifting mechanism is positioned on one side of the base. The integration level of the working table 2, the first frame and the working table lifting mechanism is high, the structure is compact, and the size of the equipment is reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

The above detailed description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A surveying instrument, comprising:

the device comprises a rack, a workbench (2), a base for fixing the workbench (2), and a workbench lifting mechanism for driving the workbench (2) to move;

at least two sliding blocks (23) which are in sliding connection with the base are arranged on the periphery of the base, and the sliding blocks (23) are fixedly connected with the rack;

the workbench lifting mechanism is connected with the base and drives the workbench (2) to move up and down along the direction vertical to the workbench (2).

2. A measuring instrument as claimed in claim 1, characterized in that said base comprises a pair of square frames (21) fixedly supporting both sides of said worktable (2);

two support legs of each square frame (21) are provided with guide rails (22);

the square frame (21) is integrated in a first frame of the rack;

the whole first frame is of a table structure, and the sliding blocks (23) are arranged at the corresponding positions of the four corners of the first frame;

the slide (23) and the guide rail (22) form the sliding connection.

3. A measuring instrument according to claim 2, characterized in that the table lifting mechanism comprises a motor (41) and a ball screw (42);

the motor (41) is arranged on the rack, and the motor (41) is connected with the ball screw (42) through a transmission device;

the ball screw (42) is arranged between the two legs and parallel to the legs;

the two ends of the ball screw (42) are rotatably supported by the rack, and the ball screw (42) is provided with a nut block fixed on the square rack (21) in a penetrating manner.

4. A measuring instrument as claimed in claim 3, characterized in that the motor (41) is arranged vertically.

5. A measuring instrument as set forth in claim 3, characterized in that the transmission means comprises a first synchronizing wheel fixed to the bottom of the output of the motor (41), a second synchronizing wheel fixed to the bottom of the ball screw (42), and a timing belt (43) meshing with both the first and second synchronizing wheels.

6. A measuring instrument as claimed in claim 3, characterized in that the end of the ball screw (42) remote from the transmission is provided with an electromagnetic brake (44).

7. A surveying instrument according to claim 1, characterized in that it further comprises a lens (1) and a light source;

the lens (1) faces the workbench (2) and is fixed on the frame;

the light source irradiates the part to be measured on the workbench (2).

8. The surveying instrument according to claim 7, characterized in that the light source comprises a ring light source (31) and a parallel light source, the ring light source (31) being located above the frame and nested below the lens (1);

the parallel light source is arranged below the frame and irradiates the workbench (2).

9. A measuring instrument according to claim 8, characterized in that the ring light source (31) is driven by a ring light source lifting mechanism (32) to move up and down in a direction perpendicular to the working table (2).