Structural design for fixing encoder connecting shaft

Abstract

The invention belongs to the technical field of encoder installation, particularly relates to a structural design for fixing an encoder connecting shaft, and aims to solve the problems that a threaded hole matched with the encoder connecting shaft is not machined in advance in a motor proposed in the background technology, and the encoder still needs to be installed on the motor after final assembly of the motor is completed. An internal connecting mechanism is arranged on the outer wall of one side of the machine shell, and an external protection mechanism is arranged on the outer wall of one side of the machine shell and located outside the internal connecting mechanism. According to the invention, the encoder can be installed on the premise that the motor shaft does not need to be processed after the final assembly of the motor is completed, the installation difficulty of the encoder is greatly reduced, a set of external protection mechanism is added, and a plurality of cross arms are arranged outside the encoder so as to play a role in supporting and collision prevention, and on the basis, the cost is reduced. The sliding cover is additionally arranged at the top of the encoder, so that the top anti-falling effect can be achieved, and the rain-proof and dust-proof effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of encoder installation, and in particular to a structural design for fixing an encoder connecting shaft. Background Art

[0002] The encoder is used to detect the motor speed in real time. The installation method is usually to process several threaded holes on the non-shaft extension end of the motor for installing the encoder connecting shaft, and then measure the motor speed through the cooperation of the encoder connecting shaft and the encoder.

[0003] This universal installation method only applies when the threaded holes on the shaft that match the encoder connecting shaft have been machined before the motor is assembled. However, if these threaded holes are not machined in advance and the motor has been assembled, it will be more difficult to install the encoder at this time, which has become a difficult problem that designers need to solve. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a structural design for fixing the encoder connecting shaft, which overcomes the shortcomings of the existing technology and effectively solves the problem that the motor has not been pre-processed with a threaded hole that cooperates with the encoder connecting shaft, and the motor still wants to be equipped with an encoder after the motor has been assembled.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A structural design for fixing an encoder connecting shaft includes a housing, an inner connecting mechanism is provided on one outer wall of the housing, and an outer protective mechanism is provided on one outer wall of the housing outside the inner connecting mechanism, the inner connecting mechanism includes a motor shaft provided on the inner wall of the housing, and a sleeve is provided on the outer wall of one end of the motor shaft, a center bolt is fixedly connected between the motor shaft and the sleeve, a connecting shaft is provided on the inner wall of one side of the sleeve, and fastening bolts distributed equidistantly are fixedly connected between the connecting shaft and the sleeve, and an encoder is fixedly connected to the outer wall of one side of the sleeve;

[0007] The external protection mechanism includes a fixing ring arranged on the outer wall of one side of the casing, and the outer wall of one side of the fixing ring is welded with cross arms distributed at equal distances, wherein a sliding cover is slidably connected between two of the cross arms.

[0008] Preferably, a pre-tightening ring is fixedly connected to the outer wall of one end of the motor shaft, and a first groove is opened on the outer wall of the other side of the sleeve, and the pre-tightening ring is tightly attached to the inner wall of the first groove.

[0009] Preferably, a second groove is formed on an outer wall of one side of the sleeve, and the connecting shaft is tightly attached to the inner wall of the second groove.

[0010] Preferably, a central threaded hole is provided at the center of the outer wall of the motor shaft and the sleeve, and a central bolt is provided on the inner wall of the central threaded hole.

[0011] Preferably, the shaft sleeve and the outer wall of the connecting shaft are both provided with fastening threaded holes distributed at equal distances, and the fastening bolts are arranged on the inner walls of the fastening threaded holes.

[0012] Preferably, the inner wall of the cross arm is provided with symmetrically distributed notches, and the size of the notches is adapted to the size of the sliding cover.

[0013] The beneficial effects of the present invention are:

[0014] 1. The structural design of the fixed encoder connecting shaft of the present invention utilizes the original central threaded hole on the motor shaft to fix the sleeve and the motor shaft with a central bolt. The left groove on the sleeve and the outer diameter of the preload ring are interference fit. On this basis, the connecting shaft and the sleeve are tightened by fastening bolts. The connecting shaft and the encoder cooperate to monitor the motor speed in real time. In this way, the encoder can be installed after the motor assembly is completed without machining the motor shaft, which greatly reduces the difficulty of encoder installation.

[0015] 2. The structural design of the fixed encoder connecting shaft of the present invention adds a set of external protection mechanisms, which uses multiple cross arms arranged on the outside of the encoder to play a supporting and anti-collision role. On this basis, by adding a sliding cover on the top of the encoder, it can not only play a role in preventing the top from falling, but also has the effect of keeping out rain and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a structural design for a fixed encoder connecting shaft proposed by the present invention;

[0017] Figure 2 This is a schematic diagram of the internal connection mechanism of the structural design of a fixed encoder connecting shaft proposed by the present invention;

[0018] Figure 3 Schematic diagram of the internal connection mechanism of the structural design of a fixed encoder connecting shaft proposed by the present invention Figure 1 ;

[0019] Figure 4 Schematic diagram of the internal connection mechanism of the structural design of a fixed encoder connecting shaft proposed by the present invention Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the disassembly of the external protection mechanism of the structural design for fixing the encoder connecting shaft proposed by the present invention.

[0021] In the figure: 1. Casing; 2. Internal connecting mechanism; 3. External protective mechanism; 4. Motor shaft; 5. Bushing; 6. Center bolt; 7. Connecting shaft; 8. Fastening bolt; 9. Encoder; 10. Fixing ring; 11. Cross arm; 12. Sliding cover; 13. Preload ring; 14. First groove; 15. Second groove; 16. Center threaded hole; 17. Fastening threaded hole; 18. Notch. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1, refer to Figures 1 to 4 A structural design for fixing an encoder connecting shaft includes a casing 1, an internal connecting mechanism 2 is provided on the outer wall of one side of the casing 1, and an external protection mechanism 3 is provided on the outer wall of one side of the casing 1 outside the internal connecting mechanism 2, the internal connecting mechanism 2 includes a motor shaft 4 provided on the inner wall of the casing 1, and a shaft sleeve 5 is provided on the outer wall of one end of the motor shaft 4, a center bolt 6 is fixedly connected between the motor shaft 4 and the shaft sleeve 5, a connecting shaft 7 is provided on the inner wall of one side of the shaft sleeve 5, and fastening bolts 8 distributed at equal distances are fixedly connected between the connecting shaft 7 and the shaft sleeve 5, and an encoder 9 is fixedly connected to the outer wall of one side of the shaft sleeve 5.

[0024] In this embodiment, the original center threaded hole 16 on the motor shaft 4 is utilized to fix the sleeve 5 and the motor shaft 4 by the center bolt 6. The left groove on the sleeve 5 and the outer diameter of the preload ring 13 are interference fit. On this basis, the connecting shaft 7 and the sleeve 5 are tightened by the fastening bolt 8. The connecting shaft 7 and the encoder 9 cooperate to monitor the motor speed in real time. In this way, after the motor assembly is completed, the installation of the encoder 9 can be completed without the need for processing the motor shaft 4, which greatly reduces the difficulty of installing the encoder 9.

[0025] Example 2, refer to Figure 5 A structural design for fixing the encoder connecting shaft, the external protection mechanism 3 includes a fixed ring 10 arranged on the outer wall of one side of the casing 1, and the outer wall of one side of the fixed ring 10 is welded with cross arms 11 distributed at equal distances, wherein a sliding cover 12 is slidably connected between the two cross arms 11.

[0026] In this embodiment, a set of external protection mechanism 3 is added, and multiple cross arms 11 are set on the outside of the encoder 9 to play a supporting and anti-collision role. On this basis, by adding a sliding cover 12 on the top of the encoder 9, it can not only play a role in preventing the top from falling, but also has the effect of keeping out rain and dust.

[0027] Reference Figures 3 to 4A preload ring 13 is fixedly connected to the outer wall of one end of the motor shaft 4 , and a first groove 14 is opened on the outer wall of the other side of the sleeve 5 , and the preload ring 13 is tightly attached to the inner wall of the first groove 14 .

[0028] Reference Figure 3 A second groove 15 is formed on the outer wall of one side of the sleeve 5 , and the connecting shaft 7 is tightly attached to the inner wall of the second groove 15 .

[0029] Reference Figures 3 to 4 A central threaded hole 16 is provided at the center of the outer wall of the motor shaft 4 and the shaft sleeve 5 , and the central bolt 6 is arranged on the inner wall of the central threaded hole 16 .

[0030] Reference Figure 3 The outer walls of the sleeve 5 and the connecting shaft 7 are both provided with fastening threaded holes 17 distributed at equal distances, and the fastening bolts 8 are arranged on the inner walls of the fastening threaded holes 17.

[0031] Reference Figure 5 The inner wall of the cross arm 11 is provided with symmetrically distributed notches 18 , and the size of the notches 18 is adapted to the size of the sliding cover 12 .

[0032] Working principle: On one side of the casing 1, it is mainly divided into two parts: an internal connecting mechanism 2 and an external protective mechanism 3. In the internal connecting mechanism 2, the original center threaded hole 16 on the motor shaft 4 is used to fix the sleeve 5 and the motor shaft 4 through the center bolt 6. The left groove on the sleeve 5 and the outer diameter of the preload ring 13 are interference fit. On this basis, the connecting shaft 7 and the sleeve 5 are tightened by the fastening bolt 8. The connecting shaft 7 and the encoder 9 cooperate to monitor the motor speed in real time. In this way, after the motor assembly is completed, the installation of the encoder 9 can be completed without processing the motor shaft 4. In the external protective mechanism 3, multiple cross arms 11 are arranged on the outside of the encoder 9 to play a supporting and anti-collision role. On this basis, a sliding cover 12 is added on the top of the encoder 9 to block rain and dust.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A structural design for fixing an encoder connecting shaft, comprising a housing (1), characterized in that: An internal connection mechanism (2) is provided on an outer wall of one side of the casing (1), and an external protection mechanism (3) is provided on an outer wall of one side of the casing (1) outside the internal connection mechanism (2); the internal connection mechanism (2) comprises a motor shaft (4) provided on the inner wall of the casing (1), and a shaft sleeve (5) is provided on the outer wall of one end of the motor shaft (4); a center bolt (6) is fixedly connected between the motor shaft (4) and the shaft sleeve (5); a connecting shaft (7) is provided on the inner wall of one side of the shaft sleeve (5), and fastening bolts (8) distributed at equal distances are fixedly connected between the connecting shaft (7) and the shaft sleeve (5); an encoder (9) is fixedly connected to the outer wall of one side of the shaft sleeve (5); The external protection mechanism (3) comprises a fixing ring (10) arranged on an outer wall of one side of the housing (1), and cross arms (11) distributed at equal distances are welded to the outer wall of one side of the fixing ring (10), wherein a sliding cover (12) is slidably connected between two of the cross arms (11).

2. The structural design of a fixed encoder connecting shaft according to claim 1 is characterized in that: A preload ring (13) is fixedly connected to the outer wall of one end of the motor shaft (4), and a first groove (14) is formed on the outer wall of the other side of the shaft sleeve (5), and the preload ring (13) is tightly attached to the inner wall of the first groove (14).

3. The structural design of a fixed encoder connecting shaft according to claim 1 is characterized in that: A second groove (15) is formed on the outer wall of one side of the shaft sleeve (5), and the connecting shaft (7) is tightly attached to the inner wall of the second groove (15).

4. The structural design of a fixed encoder connecting shaft according to claim 1 is characterized in that: A central threaded hole (16) is provided at the center of the outer wall of the motor shaft (4) and the shaft sleeve (5), and a central bolt (6) is arranged on the inner wall of the central threaded hole (16).

5. The structural design of a fixed encoder connecting shaft according to claim 1 is characterized in that: The outer walls of the shaft sleeve (5) and the connecting shaft (7) are both provided with fastening threaded holes (17) distributed at equal distances, and the fastening bolts (8) are arranged on the inner walls of the fastening threaded holes (17).

6. The structural design of a fixed encoder connecting shaft according to claim 1 is characterized in that: The inner wall of the cross arm (11) is provided with symmetrically distributed notches (18), and the size of the notches (18) is matched with the size of the sliding cover (12).

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