Worm and gear transmission device

Abstract

The worm and gear transmission device comprises a shell, a first worm and a first worm gear, the first worm is located in the shell, the two ends of the first worm are rotationally connected with the shell, the first worm gear is located in the shell, an output shaft is coaxially arranged in the middle of the first worm gear, and the two ends of the output shaft are rotationally connected to the shell; the first worm gear is meshed with the first worm, the shell is rotationally connected with a counting worm gear, the counting worm gear is communicated with a controller, and the counting worm gear is meshed with the output shaft. The method and the device have the effect of improving the counting accuracy.

Description

Technical Field

[0001] This application relates to the technical field of worm and worm gear equipment, and in particular to a worm and worm gear transmission device. Background Art

[0002] As a common mechanical transmission method, worm and worm gear transmission is widely used in various mechanical equipment, such as reducers, elevators, precision positioning devices, etc. Worm and worm gear transmission has advantages such as self-locking characteristics, low noise, and large transmission ratio, so it is irreplaceable in many application scenarios. With the continuous improvement of the requirements for transmission accuracy, the need to accurately calculate the number of rotations of the worm gear has become increasingly urgent.

[0003] In the prior art, in order to calculate the number of rotations of the worm and worm gear transmission, it is usually necessary to manually record the position of each rotation of the worm gear, or manually calculate the number of rotations of the worm gear according to the number of teeth of the worm and the position change. However, the above prior art is inefficient and prone to errors, and it is difficult to meet the requirements of automation equipment for real-time and accuracy. Utility Model Content

[0004] In order to improve the accuracy of counting, this application provides a worm and worm gear transmission device.

[0005] The worm and worm gear transmission device provided by this application adopts the following technical solutions:

[0006] A worm and worm gear transmission device includes a housing, a first worm, and a first worm gear. The first worm is located inside the housing and is rotatably connected to the housing at both ends. The first worm gear is located inside the housing. An output shaft is coaxially arranged in the middle of the first worm gear. Both ends of the output shaft are rotatably connected to the housing. The first worm gear meshes with the first worm. The housing is rotatably connected with a counting worm gear, the counting worm gear is connected to a controller, and the counting worm gear meshes with the output shaft.

[0007] By adopting the above technical solution, when the first worm rotates, it will drive the counting worm gear to rotate. After the controller senses the rotation of the counting worm gear, the controller can calculate the number of rotations of the first worm gear through the number of rotations of the counting worm gear, thereby improving the accuracy of counting.

[0008] Optionally, a counting worm is arranged on the output shaft, and the counting worm gear is arranged on the counting worm.

[0009] By adopting the above technical solution, a counting worm is arranged on the output shaft, and the counting worm gear meshes with the counting worm.

[0010] Optionally, a first through hole is coaxially opened in the middle of the output shaft, and a keyway is opened on the hole wall of the first through hole. The length direction of the keyway is parallel to the axis direction of the first through hole.

[0011] By adopting the above technical solution, the output shaft is used to connect with the input shaft of an external device. The input shaft of the external device is clamped in the first through hole, and transmission is achieved through the second keyway.

[0012] Optionally, the counting worm gear includes a smooth rod portion and a worm gear portion. The smooth rod portion is coaxially passed through the worm gear portion. A limiting member for limiting the smooth rod portion is provided on the worm gear portion. Both ends of the smooth rod portion are respectively rotatably connected to the housing.

[0013] By adopting the above technical solution, when installing the counting worm gear, the worm gear portion is meshed with the counting worm, and then the smooth rod portion is passed through the worm gear portion. The smooth rod portion and the worm gear portion are fixedly connected through the limiting member.

[0014] Optionally, mounting portions are provided at both ends of the worm gear portion. The limiting member is a limiting block. The limiting block is slidably connected to the mounting portion in the radial direction. A driving member for driving the limiting block to slide is provided on the mounting portion. An annular groove for the limiting block to be clamped in is formed on the smooth rod portion.

[0015] By adopting the above technical solution, after the smooth rod portion is passed through the worm gear portion, the driving member is used to drive the limiting block to slide, so that the limiting block is clamped in the limiting groove, thereby limiting the relative movement of the smooth rod portion and the worm gear portion along the axis direction of the smooth rod portion.

[0016] Optionally, a transmission key is slidably connected to the limiting block in the radial direction. A keyway for the transmission key to be clamped in is formed on the annular groove. A spring for forcing the transmission key to be clamped in the keyway is provided on the limiting block.

[0017] By adopting the above technical solution, after the limiting block is clamped in the annular groove, when the smooth rod portion is rotated, when the keyway of the smooth rod portion corresponds to the position of the transmission key, the spring can force the transmission key to be clamped in the keyway, so as to facilitate the worm gear to drive the smooth rod portion to rotate after rotation.

[0018] Optionally, one end of the transmission key away from the limiting block is an arc-shaped end.

[0019] By adopting the above technical solution, the contact area between the transmission key and the bottom wall of the annular groove is reduced, and further it is convenient to rotate the smooth rod portion.

[0020] In summary, the present utility model has the following beneficial effects:

[0021] 1. When the first worm rotates, it will drive the counting worm gear to rotate. After the controller senses the rotation of the counting worm gear, the controller can calculate the rotation number of the first worm gear through the rotation number of the counting worm gear;

[0022] 2. After the limiting block is clamped in the annular groove, rotate the optical rod part. When the optical rod part rotates to a position where the key groove corresponds to the transmission key, the spring can force the transmission key to be clamped in the key groove, so that the worm wheel can drive the optical rod part to rotate after rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of Embodiment 1;

[0024] Figure 2 is a schematic structural diagram of Embodiment 1 after hiding the housing;

[0025] Figure 3 is a schematic structural diagram of Embodiment 2;

[0026] Figure 4 is a schematic structural diagram of the counting worm wheel in Embodiment 2;

[0027] Figure 5 is a schematic diagram of the mechanism of the limiting block in Embodiment 2.

[0028] In the figure, 1. Housing; 2. First worm; 3. First worm wheel; 4. Output shaft; 41. First through hole; 42. First key groove; 5. Counting worm; 6. Counting worm wheel; 61. Optical rod part; 611. Annular groove; 612. Second key groove; 62. Worm wheel part; 621. Mounting part; 622. First sliding groove; 623. Limiting block; 624. Threaded rod; 625. Second sliding groove; 626. Spring; 627. Transmission key. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will further elaborate on this application Figures 1-5 in further detail with reference to the accompanying drawings.

[0030] Embodiment 1:

[0031] An embodiment of the present application discloses a worm and worm wheel transmission device. Referring to Figure 1 and Figure 2 , it includes a housing 1, a first worm 2, and a first worm wheel 3. The first worm 2 is located inside the housing 1 and both ends are rotatably connected to the housing 1. The first worm wheel 3 is located inside the housing 1. An output shaft 4 is coaxially arranged in the middle of the first worm wheel 3. Both ends of the output shaft 4 are rotatably connected to the housing 1. The first worm wheel 3 meshes with the first worm 2.

[0032] Referring to Figure 1 and Figure 2 , a first through hole 41 is coaxially opened in the middle of the output shaft 4, and a first key groove 42 is opened on the hole wall of the first through hole 41. The length direction of the first key groove 42 is parallel to the axis direction of the first through hole 41.

[0033] Referring to Figure 1 and Figure 2, the housing 1 is rotatably connected with a counting worm gear 6. The end of the counting worm gear 6 is connected to the controller, and the controller is detachably connected to the housing 1. A counting worm 5 is coaxially and fixedly connected to the output shaft 4, and the counting worm gear 6 meshes with the counting worm 5.

[0034] The implementation principle of Embodiment 1 of this application is as follows: When the first worm 2 rotates, it will drive the counting worm gear 6 to rotate. After the controller senses the rotation of the counting worm gear 6, the controller can calculate the number of rotations of the first worm gear 3 based on the number of rotations of the counting worm gear 6.

[0035] Embodiment 2:

[0036] The difference between Embodiment 2 and Embodiment 1 is that with reference to Figure 3 , Figure 4 and Figure 5 , the counting worm gear 6 includes a smooth rod portion 61 and a worm gear portion 62. The smooth rod portion 61 is coaxially inserted through the worm gear portion 62. The worm gear portion 62 is provided with a limiting member for limiting the smooth rod portion 61. Both ends of the smooth rod portion 61 are rotatably connected to the housing 1.

[0037] With reference to Figure 3 , Figure 4 and Figure 5 , both ends of the worm gear portion 62 are coaxially and fixedly connected with mounting portions 621. The mounting portions 621 are coaxially provided with second through holes. The limiting member is a limiting block 623. The hole wall of the second through hole is provided with a first sliding groove 622 in the radial direction. The limiting block 623 is slidably connected to the first sliding groove 622 in the radial direction. The mounting portion 621 is provided with a driving member for driving the limiting block 623 to slide. The driving member is a threaded rod 624. The threaded rod 624 is threadedly connected to the mounting portion 621. The rotation of the threaded rod 624 is connected to the limiting block 623. The peripheral wall of the smooth rod portion 61 is provided with an annular groove 611 for the limiting block 623 to be clamped.

[0038] With reference to Figure 3 , Figure 4 and Figure 5 , the limiting block 623 is provided with a second sliding groove 625 in the radial direction. The limiting block 623 is provided with a transmission key 627 slidably connected to the second sliding groove 625. The annular groove 611 is provided with a second key groove 612 for the transmission key 627 to be clamped. The limiting block 623 is provided with a spring 626 for forcing the transmission key 627 to be clamped in the second key groove 612. The spring 626 is located in the second sliding groove 625. One end of the spring 626 is fixedly connected to the groove wall of the second sliding groove 625, and the other end of the spring 626 is fixedly connected to the transmission key 627. The end of the transmission key 627 away from the limiting block 623 is an arc end.

[0039] The implementation principle of Embodiment 2 is as follows: When installing the counting worm wheel 6, the worm wheel part 62 is meshed with the counting worm 5, and then the optical rod part 61 is passed through the worm wheel part 62, and the optical rod part 61 and the worm wheel part 62 are fixedly connected by the limiting block 623.

[0040] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A worm and worm gear transmission device, characterized in that: It includes a housing (1), a first worm (2), and a first worm wheel (3). The first worm (2) is located inside the housing (1) and is rotatably connected to the housing (1) at both ends. The first worm wheel (3) is located inside the housing (1). An output shaft (4) is coaxially arranged in the middle of the first worm wheel (3). Both ends of the output shaft (4) are rotatably connected to the housing (1). The first worm wheel (3) meshes with the first worm (2). The housing (1) is rotatably connected to a counting worm wheel (6). The counting worm wheel (6) is connected to a controller. The counting worm wheel (6) meshes with the output shaft (4).

2. The worm and worm gear transmission device according to claim 1, characterized in that: A counting worm (5) is arranged on the output shaft (4). The counting worm wheel (6) is arranged on the counting worm (5).

3. A worm and worm gear transmission device according to claim 1, characterized in that: A first through hole (41) is coaxially opened in the middle of the output shaft (4). A first keyway (42) is opened on the hole wall of the first through hole (41). The length direction of the first keyway (42) is parallel to the axis direction of the first through hole (41).

4. A worm gear drive device according to claim 1, characterized in that: The counting worm wheel (6) includes a smooth rod part (61) and a worm wheel part (62). The smooth rod part (61) is coaxially inserted through the worm wheel part (62). The worm wheel part (62) is provided with a limiting member for limiting the smooth rod part (61). Both ends of the smooth rod part (61) are respectively rotatably connected to the housing (1).

5. A worm and worm gear transmission device according to claim 4, characterized in that: Installation parts (621) are arranged at both ends of the worm wheel part (62). The limiting member is a limiting block (623). The limiting block (623) is slidably connected to the installation part (621) in the radial direction. The installation part (621) is provided with a driving member for driving the limiting block (623) to slide. An annular groove (611) for the limiting block (623) to be clamped is opened on the smooth rod part (61).

6. A worm and worm gear transmission device according to claim 5, characterized in that: The limiting block (623) is slidably connected to a transmission key (627) in the radial direction. A second keyway (612) for the transmission key (627) to be clamped is opened in the annular groove (611). The limiting block (623) is provided with a spring (626) for forcing the transmission key (627) to be clamped in the second keyway (612).

7. A worm and worm gear transmission device according to claim 6, characterized in that: One end of the transmission key (627) away from the limiting block (623) is an arc end.

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