Electric objective lens converter

Abstract

The utility model relates to an electric objective lens converter, and particularly relates to an electric objective lens converter. The motor mounting flange is connected with the converter shell, and the motor mounting flange is further fixedly connected with a motor; the objective lens turntable gear is connected with the converter shell, the inner side of the objective lens turntable gear is provided with a rolling bearing connected with the converter shell, and the objective lens turntable gear is also provided with an objective lens mounting hole for mounting an objective lens; the check ring is connected with the rolling bearing and is connected with the objective lens turntable gear; the anti-backlash gear transmission mechanism is arranged between the objective lens rotating disc gear and the motor, and the defect that the mechanism cannot be accurately positioned due to backlash existing in gear meshing in traditional gear transmission is overcome through the arrangement of the anti-backlash gear transmission mechanism; the device has the advantages of simple structure, small size, light weight, low noise, low power, high efficiency, precise positioning and the like.

Description

Technical Field

[0001] The utility model relates to, in particular, an electric objective lens converter. Background Art

[0002] Objective lens converter is mainly used in microscopes. The objective lens converter devices on the market mainly include manual converters or electric objective lens converters composed of motors, objective lens holders, positioning pins, electronic positioning and reduction devices. In terms of design, in order to ensure sufficient output torque, the driving motor generally adopts a traditional high-power electromagnetic motor, but due to the inherent deficiencies of the traditional electromagnetic motor, the objective lens converter is large in size and has insufficient installation space; in addition, since the traditional gear reduction device or the worm gear reduction device has a gap, the transmission accuracy is not high, which affects the accuracy of objective lens positioning. Therefore, in view of the above situation, it is urgent to develop an electric objective lens converter to overcome the shortcomings in current practical applications. Utility Model Content

[0003] The purpose of the utility model is to provide an electric objective lens converter to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An electric objective lens converter, comprising:

[0006] Converter housing;

[0007] A motor mounting flange, the motor mounting flange is fixedly connected to the converter housing, and a motor is also fixedly connected to the motor mounting flange;

[0008] An objective lens turret gear, the objective lens turret gear is connected to the converter housing, and a rolling bearing connected to the converter housing is arranged inside the objective lens turret gear, and a plurality of objective lens mounting holes for mounting objective lenses are also arranged on the objective lens turret gear;

[0009] A retaining ring, which is connected to the rolling bearing and the objective lens turntable gear, and is used to fix the rolling bearing;

[0010] The backlash-eliminating gear transmission mechanism is arranged between the objective lens turntable gear and the motor, and is used to cooperate with the motor to drive the objective lens turntable gear to rotate to realize the automatic switching action of the objective lens.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The motor is mounted on a motor mounting flange, which is mounted on a converter housing. The motor drives the objective lens turntable to rotate through a backlash-eliminating gear transmission mechanism, thereby switching the objective lens. In order to compensate for the size changes caused by processing and installation errors and temperature changes when a pair of gears are engaged, a certain tooth side clearance must be left on the non-working surface of the gear teeth to prevent them from being stuck. Gear transmission mechanisms all have side clearances, which are used to prevent the gear teeth from being stuck due to errors and thermal deformation, and to leave space for the lubricating oil film between the tooth surfaces. However, the side clearances also bring idle travel to the mechanism during reversal, so that the mechanism cannot be accurately positioned. The present application overcomes the disadvantage of traditional gear transmissions that the mechanism cannot be accurately positioned due to the side clearances in gear meshing by setting a backlash-eliminating gear transmission mechanism. The present application has the advantages of simple structure, small size, light weight, low noise, low power, high efficiency, and precise positioning. At the same time, since the present invention combines a low-cost stepping motor with high positioning accuracy with an extremely simple mechanical structure, it is conducive to expanding production and promoting use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the electric objective lens converter.

[0014] Figure 2 for Figure 1 AA section view.

[0015] Figure 3 for Figure 2 The K-directed graph of .

[0016] Figure 4 Schematic diagram of the anti-backlash gear transmission structure.

[0017] In the figure: 1-motor, 2-motor mounting flange, 3-converter housing, 4-driving gear, 5-driven gear, 6-objective turntable gear, 7-rolling bearing, 8-elastic retaining ring for shaft, 9-cover plate, 10-objective lens, 11-retaining ring, 12-spring, 13-proximity switch sensor, 14-proximity switch sensing sheet. DETAILED DESCRIPTION

[0018] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] See also Figure 1 and Figure 2In one embodiment of the utility model, an electric objective lens converter comprises: a converter housing 3; a motor mounting flange 2, the motor mounting flange 2 is fixedly connected to the converter housing 3, and a motor 1 is also fixedly connected to the motor mounting flange 22; an objective lens turret gear 6, the objective lens turret gear 6 is connected to the converter housing 3, and a rolling bearing 7 connected to the converter housing 3 is arranged on the inner side, and a plurality of objective lens mounting holes for mounting an objective lens 10 are also arranged on the objective lens turret gear 6; a retaining ring 11, the retaining ring 11 is connected to the rolling bearing 7 and the objective lens turret gear 6, and is used to fix the rolling bearing 7; an anti-backlash gear transmission mechanism, the anti-backlash gear transmission mechanism is arranged between the objective lens turret gear 6 and the motor 1, and is used to cooperate with the motor 1 to drive the objective lens turret gear 6 to rotate to realize the automatic switching action of the objective lens 10.

[0021] In this embodiment, the motor 1 is mounted on the motor mounting flange 2, and the motor mounting flange 2 is mounted on the converter housing 3. The motor 1 drives the objective lens turntable to rotate through the anti-backlash gear transmission mechanism, thereby actually switching the objective lens 10. In order to compensate for the size changes caused by processing, installation errors and temperature changes when a pair of gears are engaged, a certain tooth side clearance must be left on the non-working surface of the gear teeth to prevent them from being stuck. The gear transmission mechanism has side clearance, which is used to prevent the gear teeth from being stuck due to errors and thermal deformation, and to leave space for the lubricating oil film between the tooth surfaces. However, the side clearance also brings idle travel to the mechanism during reversal, so that the mechanism cannot be accurately positioned. The present application overcomes the disadvantage of the traditional gear transmission that the mechanism cannot be accurately positioned due to the side clearance in the gear meshing by setting the anti-backlash gear transmission mechanism, and has the advantages of simple structure, small size, light weight, low noise, low power, high efficiency, precise positioning, etc. At the same time, since the utility model combines a low-cost stepping motor with high positioning accuracy with an extremely simple mechanical structure, it is conducive to expanding production and promoting use.

[0022] In one embodiment of the utility model, please refer to Figure 2 and Figure 4 The anti-backlash gear transmission mechanism includes: a driving gear 4, a driven gear 5 and a spring 12. The driving gear 4 is fixedly connected to the output end of the motor 1, and the driven gear 5 is installed on the hub of the objective lens turntable gear 6. The two ends of the spring 12 are respectively hooked on the ears of the driven gear 5 and the objective lens turntable gear 6. The driven gear 5 and the objective lens turntable gear 6 are staggered with the driving gear 4 to eliminate backlash.

[0023] In this embodiment, the driving gear 4 is mounted on the motor shaft of the motor 1, and the driven gear 5 and the objective lens turret gear 6 are mounted on the shaft on the converter housing 3. The two gears are staggered to eliminate backlash, which is characterized by accurate transmission, simple structure and economy, so it is conducive to expanding production and promoting use. In addition, an elastic retaining ring 8 for the shaft is also provided between the driven gear 5 and the converter housing 3. The application makes the driven wheel of a pair of gears into two thin sheets, wherein the objective lens turret gear 6 is fixed on the rolling bearing 7, and the driven gear 5 is sleeved on the wheel hub of the objective lens turret gear 6. The driven gear 5 and the objective lens turret gear 6 are respectively processed with hanging ears, and the two ends of the tension spring 12 are respectively hooked on the hanging ears of the two gears. This structure utilizes the tension of the tension spring, so that the left side of the teeth of the thin sheet gear and the right side of the teeth of the other thin sheet gear are respectively close to the left and right sides of the tooth groove of the driving gear 4, and the tooth side clearance is eliminated through this staggered tooth structure, and no lost motion error will be generated when reversing.

[0024] In one embodiment of the present utility model, please refer to Figure 3 , and also includes: a cover plate 9, a proximity switch sensor 13 and a proximity switch sensing sheet 14, the cover plate 6 is detachably connected and arranged on the outside of the bottom end of the converter housing 3, the cover plate 9 is provided with a proximity switch sensor 13, and the proximity switch sensing sheet 14 is arranged on the outside of the proximity switch sensor 13 and is connected to the objective lens turntable.

[0025] The electric objective lens converter, by providing a backlash-eliminating gear transmission mechanism, overcomes the disadvantage of the traditional gear transmission that the mechanism cannot be accurately positioned due to the side clearance in the gear meshing, and has the advantages of simple structure, small size, light weight, low noise, low power, high efficiency, precise positioning, etc. At the same time, since the utility model combines a low-cost stepping motor with high positioning accuracy with an extremely simple mechanical structure, it is conducive to expanding production and promoting use.

[0026] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model. These should also be regarded as the protection scope of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. An electric objective lens converter, characterized in that: include: Converter housing; A motor mounting flange, the motor mounting flange is fixedly connected to the converter housing, and a motor is also fixedly connected to the motor mounting flange; An objective lens turret gear, the objective lens turret gear is connected to the converter housing, and a rolling bearing connected to the converter housing is arranged inside the objective lens turret gear, and a plurality of objective lens mounting holes for mounting objective lenses are also arranged on the objective lens turret gear; A retaining ring, which is connected to the rolling bearing and the objective lens turntable gear, and is used to fix the rolling bearing; The backlash-eliminating gear transmission mechanism is arranged between the objective lens turntable gear and the motor, and is used to cooperate with the motor to drive the objective lens turntable gear to rotate to realize the automatic switching action of the objective lens.

2. The electric nosepiece according to claim 1, characterized in that: The anti-backlash gear transmission mechanism comprises: a driving gear, a driven gear and a spring, wherein the driving gear is fixedly connected to the output end of the motor, the driven gear is mounted on the hub of the objective lens turntable gear, and both ends of the spring are respectively hooked on the hanging ears of the driven gear and the objective lens turntable gear, and the driven gear and the objective lens turntable gear are staggered with the driving gear to eliminate backlash.

3. The electric nosepiece according to claim 2, characterized in that: Also includes: A cover plate, a proximity switch sensor and a proximity switch sensing sheet, wherein the cover plate is detachably connected and arranged on the outer side of the bottom end of the converter housing, the cover plate is provided with a proximity switch sensor, and the proximity switch sensing sheet is arranged on the outer side of the proximity switch sensor and connected to the objective lens turntable.

Images