Traction machine using magnetic encoder
By introducing a fixed plate and mounting bracket into the traction machine, and using positioning stops and bolt connections, the accuracy problem between the magnetic ring and the encoder sensing head is solved, achieving a high-precision and fast installation process, and improving the installation efficiency and accuracy of the traction machine.
Patent Information
- Application Number
- CN202520786680.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-24
AI Technical Summary
The installation of existing magnetic encoder traction machines requires a lot of manpower and time due to the high precision requirements of the magnetic ring and the encoder sensing head, and it is difficult to guarantee uniform installation accuracy.
By introducing a fixed plate and mounting bracket into the traction machine, the precise positioning of the magnetic ring and encoder sensing head is achieved using positioning stops and bolt connections, ensuring the accuracy of radial clearance and axial overlapping sensing areas, simplifying the installation process and eliminating adjustment steps.
It achieves high-precision installation of magnetic encoders, simplifies the installation process, saves time and labor, and improves the consistency and reliability of installation accuracy.
Smart Images
Figure CN223936053U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of traction machine technology, specifically to a traction machine using a magnetic encoder. Background Technology
[0002] Existing traction machines using magnetic encoders require a specific radial clearance between the magnetic ring and the encoder sensor head, as they are installed in different positions. Excessive clearance can affect the sensing effect or even cause failure, while insufficient clearance can lead to interference and damage. Simultaneously, the magnetic ring and encoder sensor head must have a certain overlap in their sensing areas in the axial direction, and cannot deviate from each other. The high precision requirements for the installation of the magnetic ring and encoder sensor head result in significant labor and time expenditure during installation and debugging. Furthermore, even traction machines from the same batch often lack consistent installation accuracy. Utility Model Content
[0003] The purpose of this invention is to provide a traction machine with high precision magnetic encoder installation, which is convenient, quick, and requires no adjustment.
[0004] The purpose of this utility model is achieved as follows.
[0005] A traction machine using a magnetic encoder includes a stator assembly, a rotor assembly, an encoder sensing head, and a magnetic ring. The rotor assembly is rotatably mounted on a fixed shaft of the stator assembly. The machine also includes a fixed plate and a mounting bracket. The rotor assembly and the fixed plate are provided with a first pair of mutually cooperating positioning stops, and the rotor assembly and the fixed plate are axially fastened by a first bolt. The magnetic ring is fixed on the fixed plate. The stator assembly and the mounting bracket are provided with a second pair of mutually cooperating positioning stops, and the stator assembly and the mounting bracket are axially fastened by a second bolt. The encoder sensing head is mounted on the mounting bracket. There is a radial gap and an axially overlapping sensing area between the magnetic ring and the encoder sensing head that do not affect their mutual movement and sensing effect.
[0006] Furthermore, the fixing plate is annular, and the inner end of the fixing plate is provided with a first stop. The first stop is provided with a first mating guide angle and a first mating length. The first stop constitutes a convex stop of the first pair of positioning stops. The rotor assembly is provided with a second stop, a second mating guide angle and a second mating length. The second stop constitutes a concave stop of the first pair of positioning stops. The fixing plate is provided with a first fastening bolt hole in the axial direction. A first screw hole is provided on the end face of the rotor assembly. The first bolt passes through the first fastening bolt hole and the first screw hole for threaded connection.
[0007] Furthermore, the inner end of the mounting bracket is provided with a third stop, which has a third mating guide angle and a third mating length. The third stop forms a convex stop of the second pair of positioning stops. The end of the fixed shaft is provided with a fourth stop, which has a fourth mating guide angle and a fourth mating length. The fourth stop forms a concave stop of the second pair of positioning stops. The mounting bracket is provided with a second fastening bolt hole, and a second threaded hole is provided on the end face of the fixed shaft. The second bolt passes through the second fastening bolt hole and the second threaded hole for threaded connection.
[0008] Furthermore, the mounting bracket has an axial through hole for placing the encoder sensor head at its outer end. The mounting bracket has a fixing seat around the through hole, and the fixing seat has a positioning hole and a third screw hole. The encoder sensor head has a positioning post and a third fastening bolt hole. The encoder sensor head is inserted into the through hole, the positioning post is aligned and inserted into the positioning hole, and the threads of the third fastening bolt hole and the third screw hole are aligned and fastened by the third bolt, so that the encoder sensor head is fixed on the axial end face of the fixing seat.
[0009] Furthermore, the inner end of the mounting bracket is provided with an annular groove for accommodating the magnetic ring and the outer end of the fixing plate. A through hole connects to the annular groove, and the encoder sensing head extends into the annular groove. The encoder sensing head is placed radially outside the magnetic ring.
[0010] Furthermore, the outer end of the fixed plate is provided with a fifth stop, the fifth stop is provided with a fifth guide angle and a fifth mating length, and the magnetic ring and the fifth stop are interference fit.
[0011] This invention uses a fixing plate to position and install the magnetic ring on the rotor assembly, and a mounting bracket to position and install the encoder sensor head on the stator assembly, so that the magnetic ring and the encoder sensor head are positioned and matched. The assembly is convenient, quick and easy, and requires no adjustment. By improving the assembly accuracy of the fixing plate and rotor assembly, and the mounting bracket and stator assembly, the matching accuracy of the magnetic ring and the encoder sensor head is improved, so as to achieve a high-requirement, stable and reliable matching accuracy. Attached Figure Description
[0012] Figure 1 This is a front structural diagram of Example 1.
[0013] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.
[0014] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the DD direction.
[0015] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction.
[0016] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure along the CC direction.
[0017] Figure 6 This is a schematic diagram of the mounting bracket in Example 1.
[0018] Figure 7 This is a front structural diagram of the mounting bracket in Example 1.
[0019] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the EE.
[0020] Figure 9 This is a schematic diagram of the encoder sensing head in Example 1.
[0021] Figure 10 This is a schematic diagram of the magnetic ring structure in Example 1.
[0022] Figure 11 This is a schematic diagram of the structure of the fixing plate in Embodiment 1.
[0023] Figure 12 This is a cross-sectional structural diagram of the fixing plate in Embodiment 1.
[0024] Figure 13 This is a schematic diagram of the structure of the traction machine stator and rotor after installation in Example 1. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] Example 1, see Figure 1-13 As shown, a traction machine using a magnetic encoder includes a stator assembly 1, a rotor assembly 2, an encoder sensing head 3, a magnetic ring 4, a fixing plate 5, a mounting bracket 6, a first bolt 7, a second bolt 8, and a third bolt 9.
[0027] The rotor assembly 2 is rotatably mounted on the fixed shaft 10 of the stator assembly 1.
[0028] The rotor assembly 2 and the fixed plate 5 are provided with a first pair of locating stops that cooperate with each other, and the rotor assembly 2 and the fixed plate 5 are axially fastened by the first bolt 7. The magnetic ring 4 is fixed on the fixed plate 5. The stator assembly 1 and the mounting bracket 6 are provided with a second pair of locating stops that cooperate with each other, and the stator assembly 1 and the mounting bracket 6 are axially fastened by the second bolt 8. The encoder sensing head 3 is mounted on the mounting bracket 6. There is a radial gap δ and an axially overlapping sensing area h34 between the magnetic ring 4 and the encoder sensing head 3 that do not affect their mutual movement and sensing effect.
[0029] Specifically, the fixing plate 5 is annular, with a first stop 51 at its inner end. The first stop 51 has a first mating guide angle α21 and a first mating length h21, forming a convex stop of the first pair of positioning stops. The rotor assembly 2 has a second stop 20, a second mating guide angle α21, and a second mating length h21, forming a concave stop of the first pair of positioning stops. The fixing plate 5 has a first fastening bolt hole 53 axially, and a first threaded hole corresponding to the end face of the rotor assembly 2. A first bolt 7 passes through the first fastening bolt hole 53 and the first threaded hole for threaded connection. The fixing plate 5 has a fifth stop 52 at its outer end, with a fifth guide angle α23 and a fifth mating length H23. The magnetic ring 4 and the fifth stop 52 are interference-fitted. In this embodiment, the first mating length h21 and the second mating length H21 are equal.
[0030] The mounting bracket 6 has a third stop 61 at its inner end, which has a third mating guide angle α41 and a third mating length l41. The third stop 61 forms the convex stop of the second pair of positioning stops. The fixed shaft 10 has a fourth stop 11 at its end, which has a fourth mating guide angle α41 and a fourth mating length L41. The fourth stop 11 forms the concave stop of the second pair of positioning stops. The mounting bracket 6 has a second fastening bolt hole 62, and a second threaded hole is provided on the end face of the fixed shaft 10. The second bolt 8 passes through the second fastening bolt hole 62 and the second threaded hole for threaded connection. In this embodiment, the third mating length l41 is greater than the fourth mating length L41.
[0031] The mounting bracket 6 has a through hole 63 on its outer end for placing the encoder sensor head 3. A fixing seat 64 is provided around the through hole 63 on the mounting bracket 6. The fixing seat 64 has a positioning hole 65 and a third screw hole 66 on its axial end face. The encoder sensor head 3 has a positioning pin 31 and a third fastening bolt hole 32. The encoder sensor head 3 is inserted into the through hole 63, the positioning pin 31 is aligned and inserted into the positioning hole 65, and the threads of the third fastening bolt hole 32 and the third screw hole 66 are aligned and fastened by a third bolt 9, thus fixing the encoder sensor head 3 to the axial end face of the fixing seat 64. The inner end of the mounting bracket 6 has an annular groove 67 for accommodating the magnetic ring 4 and the outer end of the fixing plate 5. The through hole 63 connects to the annular groove 67, and the encoder sensor head 3 extends into the annular groove 67, positioned radially outside the magnetic ring 4. That is, the end face of the fixing seat 64 and the inner end face of the mounting bracket 6 serve as assembly reference surfaces. The fixing seat 64 and the mounting bracket 6 are integrally machined.
[0032] In this invention, the magnetic ring 4 is first fixed to the fixing plate 5, and the fixing plate 5, with the magnetic ring 4 attached, is installed on the rotor assembly 2. The mounting bracket 6 is installed on the stator assembly 1, and finally, the encoder sensing head 3 is positioned and installed. The radial clearance δ and axial overlap area h34 between the magnetic ring 4 and the encoder sensing head 3 are ensured by the machining precision of the stator assembly 1, rotor assembly 2, mounting bracket 6, and fixing plate 5. During installation, only the first bolt 7, the second bolt 8, and the third bolt 9 need to be tightened; no further adjustments are required, saving encoder installation and debugging time.
[0033] The terms used in this utility model, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are only used for distinction.
[0034] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.
[0035] In this utility model, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.
[0036] Terms used in this invention, such as "approximately," "overall," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.
Claims
1. A traction machine using a magnetic encoder, comprising a stator assembly (1), a rotor assembly (2), an encoder sensing head (3), and a magnetic ring (4), wherein the rotor assembly (2) is rotatably mounted on a fixed shaft (10) of the stator assembly (1), characterized in that, It also includes a fixing plate (5) and a mounting bracket (6). The rotor assembly (2) and the fixed plate (5) are provided with a first pair of locating stops that cooperate with each other, and the rotor assembly (2) and the fixed plate (5) are axially fastened by the first bolt (7), and the magnetic ring (4) is fixed on the fixed plate (5). The stator assembly (1) and the mounting bracket (6) are provided with a second pair of positioning stops that cooperate with each other, and the stator assembly (1) and the mounting bracket (6) are axially fastened by the second bolt (8). The encoder sensing head (3) is mounted on the mounting bracket (6). There is a radial gap (δ) and an axially overlapping sensing area (h34) between the magnetic ring (4) and the encoder sensing head (3) that do not affect each other's movement and sensing effect.
2. The traction machine using a magnetic encoder according to claim 1, characterized in that, The fixing plate (5) is annular. The inner end of the fixing plate (5) is provided with a first stop (51). The first stop (51) is provided with a first mating guide angle (a21) and a first mating length (h21). The first stop (51) forms a convex stop of the first pair of positioning stops. The rotor assembly (2) is provided with a second stop (20), a second mating guide angle (A21) and a second mating length (H21). The second stop (20) forms a concave stop of the first pair of positioning stops. The fixing plate (5) is provided with a first fastening bolt hole (53) in the axial direction. The corresponding end face of the rotor assembly (2) is provided with a first screw hole. The first bolt (7) passes through the first fastening bolt hole (53) and the first screw hole for threaded connection.
3. The traction machine using a magnetic encoder according to claim 1, characterized in that, The mounting bracket (6) has a third stop (61) at its inner end. The third stop (61) has a third mating guide angle (a41) and a third mating length (l41). The third stop (61) forms the convex stop of the second pair of positioning stops. The fixed shaft (10) has a fourth stop (11) at its end. The fourth stop (11) has a fourth mating guide angle (A41) and a fourth mating length (L41). The fourth stop (11) forms the concave stop of the second pair of positioning stops. The mounting bracket (6) has a second fastening bolt hole (62). The fixed shaft (10) has a second screw hole on its end face. The second bolt (8) passes through the second fastening bolt hole (62) and the second screw hole for threaded connection.
4. The traction machine using a magnetic encoder according to claim 1, characterized in that, The mounting bracket (6) has an axial through hole (63) for placing the encoder sensor head (3) on its outer end. The mounting bracket (6) has a fixed seat (64) around the through hole (63). The fixed seat (64) has a positioning hole (65) and a third screw hole (66) on its end face. The encoder sensor head (3) has a positioning post (31) and a third fastening bolt hole (32). The encoder sensor head (3) is inserted into the through hole (63). The positioning post (31) is aligned and inserted into the positioning hole (65). The threads of the third fastening bolt hole (32) and the third screw hole (66) are aligned and fastened by the third bolt (9), so that the encoder sensor head (3) is fixed on the axial end face of the fixed seat (64).
5. The traction machine using a magnetic encoder according to claim 4, characterized in that, The mounting bracket (6) has an annular groove (67) at the inner end to accommodate the magnetic ring (4) and the outer end of the fixing plate (5). The through hole (63) connects to the annular groove (67). The encoder sensing head (3) extends into the annular groove (67) and is placed on the radial outer side of the magnetic ring (4).
6. The traction machine using a magnetic encoder according to claim 1, characterized in that, The outer end of the fixed plate (5) is provided with a fifth stop (52), the fifth stop (52) is provided with a fifth guide angle (a23) and a fifth fitting length (H23), and the magnetic ring (4) and the fifth stop (52) are interference fit.