Gear transmission teaching demonstration device

Abstract

The utility model relates to a gear transmission teaching demonstration device, which comprises a base, and a driving rotating shaft, a transmission rotating shaft and an output rotating shaft are sequentially arranged on the top surface of the base from back to front. The driving rotating shaft extends left and right, and the right half area of the driving rotating shaft is in key connection with a multi-linkage gear A; the transmission rotating shaft is parallel to the driving rotating shaft, and a plurality of transmission gears distributed left and right at intervals are fixedly arranged on the transmission rotating shaft; the output rotating shaft is parallel to the transmission rotating shaft, and the left half area of the output rotating shaft is in key connection with a multi-linkage gear. The utility model aims to provide a gear transmission teaching demonstration device, which can demonstrate rotation speed changes realized by different gear combinations. The utility model has the advantages that the main shaft of the machine tool can obtain different rotating speeds by moving the multi-linkage gear A and the multi-linkage gear B, so that students can more deeply understand the working principle of the speed reducer.

Description

Technical Field

[0001] The utility model relates to the field of teaching aids, in particular to a gear transmission teaching demonstration device. Background Art

[0002] Teaching aids are a kind of teaching auxiliary tool. Using teaching aids can make abstract knowledge visual, concrete and vivid.

[0003] The teaching of transmission structure is a difficult point in the mechanical principle class, which involves gear transmission mechanism, chain transmission mechanism, belt transmission mechanism, worm gear transmission mechanism and connecting rod transmission structure. In order to facilitate understanding, teaching aids are generally used for demonstration in teaching.

[0004] A Chinese patent (CN 216145333U) discloses a mechanical design classroom demonstration teaching aid, including an operating table and a demonstration mechanism, wherein the bottom of the operating table is fixedly connected to a leg, and the bottom of the leg is fixedly connected to a roller; the top of the operating table is provided with a demonstration mechanism, and the demonstration mechanism includes a first gear, a first rotating shaft, a first vertical rod, a rotating rod, a second rotating shaft and a second gear, wherein the outer side of the first rotating shaft is rotatably connected to the first gear, and the outer side of the second rotating shaft is rotatably connected to the second gear. The above teaching aid has a single gear combination form, and cannot demonstrate the situation where different types of gears cooperate to achieve speed changes. Summary of the invention

[0005] The utility model aims to provide a gear transmission teaching demonstration device, which can demonstrate the speed change achieved by different gear combinations.

[0006] The purpose of the utility model is achieved through the following technical solutions: a gear transmission teaching demonstration device, which includes a base, and the top surface of the base is provided with a driving shaft, a transmission shaft and an output shaft in sequence from back to front; the driving shaft is extended left and right, and its right half is keyed to a multi-link gear A; the transmission shaft is parallel to the driving shaft, and a plurality of transmission gears spaced apart from each other are fixed on the transmission shaft; the output shaft is parallel to the transmission shaft, and the left half of the output shaft is keyed to a multi-link gear B; the transmission gears on the transmission shaft have different radii, and the multi-link gear A is formed by a plurality of driving gears being fitted and fixed, and each driving gear is meshed with the transmission gear on the right half of the transmission shaft in a one-to-one correspondence; the multi-link gear B is formed by a plurality of driven gears being fitted and fixed, and each driven gear is meshed with the transmission gear on the left half of the transmission shaft in a one-to-one correspondence.

[0007] Compared with the prior art, the advantages of the utility model are: the right half of the active shaft of the utility model is key-connected with a multi-gear A, the left half of the output shaft is key-connected with a multi-gear B, and a plurality of transmission gears spaced apart on the left and right are fixedly provided on the transmission shaft. By moving the multi-gear A and the multi-gear B, the machine tool spindle can obtain different rotation speeds, which is convenient for students to have a deeper understanding of the working principle of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a three-dimensional structural schematic diagram of a gear transmission teaching demonstration device embodiment.

[0009] Figure 2 yes Figure 1 Top view of the .

[0010] Explanation of reference numerals: 1 base, 2 driving shaft, 3 transmission shaft, 4 output shaft, 5 transmission gear, 6 multi-gear B, 7 driven pulley, 8 driving pulley, 9 transmission belt, 10 motor, 11 mounting support, 12 machine tool spindle, 13 multi-gear A. DETAILED DESCRIPTION

[0011] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0012] like Figure 1 to Figure 2 Shown is a schematic diagram of an embodiment of a gear transmission teaching demonstration device provided by the utility model.

[0013] A gear transmission teaching demonstration device, comprising a base 1, wherein a driving shaft 2, a transmission shaft 3 and an output shaft 4 are arranged on the top surface of the base 1 in sequence from the back to the front;

[0014] The driving shaft 2 is extended to the left and right, and the right half of the driving shaft 2 is key-connected to a multi-link gear A13;

[0015] The transmission shaft 3 is parallel to the driving shaft 2, and a plurality of transmission gears 5 are fixedly arranged on the transmission shaft 3 at intervals on the left and right;

[0016] The output shaft 4 is parallel to the transmission shaft 3, and the left half of the output shaft 4 is key-connected to a multi-link gear B6;

[0017] The transmission gears 5 on the transmission shaft 3 have different radii, and the multi-linked gear A13 is formed by a number of driving gears that are fitted and fixed together, and each driving gear is meshed with the transmission gear 5 on the right half of the transmission shaft 3 in a one-to-one correspondence;

[0018] The multi-link gear B6 is formed by a plurality of driven gears being fitted and fixed together, and each driven gear is meshed with the transmission gear 5 on the left half of the transmission shaft 3 in a one-to-one correspondence.

[0019] The multi-link gear A13 includes three driving gears, and the radius of the driving gear in the middle is larger than the radius of the driving gears on the left and right sides. The above design can ensure that the multi-link gear A13 will not interfere with the transmission gear 5 during the sliding process of the right half of the driving shaft 2.

[0020] The multi-stage gear B6 includes two driven gears, and the radius of the driven gear on the left side is greater than the radius of the driven gear on the right side.

[0021] The left and right sides of the driving shaft 2 , the transmission shaft 3 and the output shaft 4 are all rotatably connected with mounting supports 11 , and the mounting supports 11 are detachably connected to the base 1 .

[0022] A groove matching the mounting support 11 is provided on the base 1. After the mounting support 11 is placed in the groove, it can be fixedly connected to the base 1 by pins.

[0023] The mounting support 11 is provided with a circular hole which is rotatably connected to the driving shaft 2 , the transmission shaft 3 and the output shaft 4 .

[0024] The driving shaft 2 , the transmission shaft 3 and the output shaft 4 are all detachably connected to the mounting support 11 .

[0025] The transmission shaft 3 is formed by splicing a plurality of short rods, and each short rod is fixedly connected to a transmission gear 5 .

[0026] The right end of the output shaft 4 is connected to a machine tool spindle 12. The machine tool spindle 12 is used to observe the final rotation speed after different gear combinations.

[0027] A driven pulley 7 is also fixedly connected to the left side of the driving shaft 2. A motor 10 is provided on the base 1. The output shaft of the motor 10 is connected to a driving pulley 8. A transmission belt 9 is sleeved between the driving pulley 8 and the driven pulley 7.

[0028] Alternatively, a hand wheel can be provided on the left side of the active rotating shaft 2 as power output.

Claims

1. A gear transmission teaching demonstration device, comprising a base (1), characterized in that: The top surface of the base (1) is provided with a driving rotating shaft (2), a transmission rotating shaft (3) and an output rotating shaft (4) in sequence from the back to the front; The driving shaft (2) is extended to the left and right, and its right half is key-connected to a multi-link gear A (13); The transmission shaft (3) is parallel to the driving shaft (2), and a plurality of transmission gears (5) are fixedly arranged on the transmission shaft (3) and are spaced apart from each other. The output shaft (4) is parallel to the transmission shaft (3), and the left half of the output shaft (4) is key-connected to a multi-link gear B (6); The transmission gears (5) on the transmission shaft (3) have different radii, and the multi-linked gear A (13) is formed by a plurality of driving gears that are fitted and fixed together, and each driving gear is meshed with the transmission gears (5) on the right half of the transmission shaft (3) in a one-to-one correspondence; The multi-linked gear B (6) is formed by a plurality of driven gears being fitted and fixed together, and each driven gear is meshed with the transmission gear (5) on the left half of the transmission shaft (3) in a one-to-one correspondence.

2. A gear transmission teaching demonstration device according to claim 1, characterized in that: The multi-link gear A (13) comprises three driving gears, wherein the radius of the driving gear in the middle is larger than the radius of the driving gears on the left and right sides.

3. A gear transmission teaching demonstration device according to claim 1, characterized in that: The multi-stage gear B (6) includes two driven gears, and the radius of the driven gear on the left side is larger than the radius of the driven gear on the right side.

4. A gear transmission teaching demonstration device according to claim 1, characterized in that: The left and right sides of the active rotating shaft (2), the transmission rotating shaft (3) and the output rotating shaft (4) are all rotatably connected to mounting supports (11), and the mounting supports (11) are detachably connected to the base (1).

5. A gear transmission teaching demonstration device according to claim 1, characterized in that: The right end of the output rotating shaft (4) is connected to a machine tool spindle (12).

6. A gear transmission teaching demonstration device according to claim 1, characterized in that: The transmission shaft (3) is formed by splicing a plurality of short rods, and each short rod is fixedly connected to a transmission gear (5).

7. A gear transmission teaching demonstration device according to any one of claims 1 to 6, characterized in that: The left side of the driving shaft (2) is also fixedly connected to a driven pulley (7), the base (1) is provided with a motor (10), the output shaft of the motor (10) is connected to a driving pulley (8), and a transmission belt (9) is sleeved between the driving pulley (8) and the driven pulley (7).

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