An encoder structure applied to a small stopper

Abstract

The utility model belongs to encoder technical field discloses a kind of encoder structure applied to small stop, for connecting the main shaft with lower bearing and upper bearing in end sleeve to encoder, including cover, hollow and open mouth encoder main body and the moving stop piece with interval sleeve in the outer of main shaft;Cover is used to cover encoder main body;The bottom wall of encoder main body is provided with first section, second section and third section with gradually smaller inner diameter, and first section, second section and third section are arranged along the direction from inside to outside of encoder main body;Moving stop piece is clamped between lower bearing and upper bearing, lower bearing and upper bearing are arranged in first section, and the stop of first section and second section junction place abuts lower bearing;The outer end of main shaft is stretched out from third section encoder main body. By moving stop piece, double-bearing shaft system can be disconnected from encoder main body in advance to adjust;Eliminate the influence of encoder main body on external installation stop by bearing outer ring size, effectively solve the realizability of small stop demand miniature encoder.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, specifically to an encoder structure applied to small stop surfaces. Background Technology

[0002] Solid shaft encoders currently in conventional design often use flange locating for installation. Dual bearing shaft systems all employ a main bearing housing with a bidirectional bearing outer ring locating. The two bearings are respectively arranged on both sides of the bidirectional locating, and the two bearings are installed from both sides of the encoder.

[0003] Conventional solid shaft encoder shaft system solutions, such as Figure 1 As shown, since a bearing needs to be installed from outside the encoder, in the direction of the external mating stop, the size of the external mating stop or the size of the oil seal outer ring fixing stop is limited by the size of the bearing's outer diameter, such as... Figure 1 The dimension (L) of the mating stop shown can only be larger than the dimension of the bearing outer ring. The bearing affects the structural dimensions of the body for external assembly with the encoder. In addition, in conventional designs, the shaft stop and the body are the same component, and when assembling and adjusting dual shaft systems, they must be assembled and adjusted together with the body. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a shaft system solution with a movable stop, which can be applied to products with independent shaft system assembly and adjustment, eliminating the influence of bearings on the external structure of the encoder body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An encoder structure for use with small stop plates is used to connect a main shaft with a lower bearing and an upper bearing on its inner end to an encoder. The structure includes a cover, a hollow and open encoder body, and movable stop plates with intervals that are fitted over the main shaft. The cover is used to cover the encoder body; The bottom wall of the encoder body has a through hole, and the through hole is provided with a first section, a second section and a third section with gradually decreasing inner diameter along the direction from the inside to the outside of the encoder body; The movable stop piece is clamped between the lower bearing and the upper bearing. The lower bearing and the upper bearing are located in the first section. The stop piece at the junction of the first section and the second section abuts against the outer ring of the lower bearing. The inner diameter of the second section is larger than the inner ring of the lower bearing. The outer end of the main shaft extends out of the encoder body from the third section.

[0006] Furthermore, it also includes a PCB circuit board fixed inside the encoder body, the inner wall of the encoder body is provided with a stepped surface, and the PCB circuit board is attached to the stepped surface.

[0007] Furthermore, the bottom surface of the encoder body is thickened in the middle so that a ring protruding from the encoder body is fixed on the bottom surface of the encoder body, and the ring is sleeved on the outside of the main shaft.

[0008] Furthermore, the inner diameter of the movable stop piece is located between the inner and outer rings of the upper bearing.

[0009] Furthermore, the thickness of the second segment is 0.5-1mm.

[0010] Compared with the prior art, the beneficial effects of this utility model are: A novel shaft system structure is designed to address scenarios where the encoder stop size is too small or the oil seal outer ring is smaller than the bearing outer ring, enabling a dual-bearing solution. A movable stop plate concept is introduced, making it possible to install the dual bearings from one side of the encoder. The movable stop plate allows the dual-bearing shaft system to be detached from the main body for adjustment. Internally, the encoder main body uses three sections of different diameters—the first, second, and third—to create an inward-facing stop plate, which limits the shaft system's installation position after assembly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an encoder in the prior art; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the encoder structure disclosed in this utility model. Figure 3 This is a three-dimensional structural diagram of the encoder structure disclosed in this utility model. Figure 4 This is an exploded view of the encoder structure disclosed in this utility model; Figure 5 This is a schematic diagram of the external structure of the encoder structure disclosed in this utility model. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] like Figure 2-5 The encoder structure shown is used to connect a main shaft 1 with a lower bearing 2 and an upper bearing 3 on its inner end to an encoder. It includes a cover 5, a hollow and open encoder body 6, and a movable stop plate 4 with intervals that is sleeved on the outside of the main shaft 1. Cover 5 is used to cover the encoder body 6; A through hole is provided on the bottom wall of the encoder body 6. The through hole is provided with a first section, a second section and a third section with gradually decreasing inner diameter along the direction from the inside to the outside of the encoder body 6. The movable stop plate 4 is clamped between the lower bearing 2 and the upper bearing 3. The lower bearing 2 and the upper bearing 3 are located in the first section. The stop at the junction of the first section and the second section abuts against the outer ring of the lower bearing 2. The inner diameter of the second section is larger than the inner ring of the lower bearing.

[0014] The outer end of the main shaft 1 extends out of the encoder body 6 from the third section.

[0015] By incorporating a movable stop plate 4, the main shaft 1 passes sequentially through the upper bearing 3, the movable stop plate 4, and the lower bearing 2, forming an independent shaft system after assembly and adjustment. This facilitates its installation as a whole into the encoder body 6 through its open opening. The movable stop plate 4 is fitted onto the shaft, positioned between the two bearings, and contacts the outer rings of both bearings. The movable stop plate 4 enables smooth operation of the dual-bearing shaft system and allows it to be detached from the main body for assembly and adjustment. Existing assembly processes such as interference fits are used to fix the outer rings of the upper and lower bearings to the encoder body 6, and the inner rings of the upper and lower bearings to the main shaft.

[0016] The encoder body 6 has a single-sided stop with two-tiered steps at one end of the bearing housing for mounting a movable double-bearing shaft system. Specifically, the step formed between the first and second sections blocks the outer ring of the lower bearing; the second section is designed to ensure no contact between the body and the inner ring of the lower bearing, preventing friction during rotation.

[0017] In a preferred embodiment, the encoder body 6 is further comprising a PCB circuit board 7 fixed inside the encoder body 6, the inner wall of the encoder body 6 having a stepped surface, and the PCB circuit board 7 being attached to the stepped surface.

[0018] In a preferred embodiment, the bottom surface of the encoder body 6 is thickened in the middle so that a ring protruding from the encoder body 6 is fixed to the bottom surface of the encoder body 6, and the ring is fitted around the main shaft 1. This forms a stop on the outside of the encoder body 6, which facilitates the installation of the encoder onto other parts.

[0019] In a preferred embodiment, the inner diameter of the movable stop piece 4 is located between the inner and outer rings of the upper bearing 3.

[0020] In a preferred embodiment, the thickness of the second segment is 0.5-1 mm.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An encoder structure for use with small stop gaps, used to connect a main shaft (1) with a lower bearing (2) and an upper bearing (3) fitted on its inner end to an encoder, characterized in that: It includes a cover (5), a hollow and open encoder body (6), and a spaced movable stop plate (4) that fits outside the main shaft (1). The cover (5) is used to cover the encoder body (6); The bottom wall of the encoder body (6) has a through hole, and the through hole is provided with a first section, a second section and a third section with gradually decreasing inner diameter along the direction from the inside to the outside of the encoder body (6); The movable stop piece (4) is sandwiched between the lower bearing (2) and the upper bearing (3). The lower bearing (2) and the upper bearing (3) are arranged in the first section. The stop at the junction of the first section and the second section abuts against the outer ring of the lower bearing (2). The inner diameter of the second section is larger than the inner ring of the lower bearing (2). The outer end of the main shaft (1) extends from the third section of the encoder body (6).

2. The encoder structure applied to a small stop according to claim 1, characterized in that: It also includes a PCB circuit board (7) fixed inside the encoder body (6), the inner wall of the encoder body (6) is provided with a stepped surface, and the PCB circuit board (7) is attached to the stepped surface.

3. The encoder structure applied to a small stop according to claim 1, characterized in that: The bottom surface of the encoder body (6) is thickened in the middle so that a ring protruding from the encoder body (6) is fixed on the bottom surface of the encoder body (6), and the ring is sleeved on the outside of the main shaft (1).

4. The encoder structure applied to a small stop according to claim 1, characterized in that: The inner diameter of the movable stop piece (4) is located between the inner and outer rings of the upper bearing (3).

5. The encoder structure applied to a small stop according to claim 1, characterized in that: The thickness of the second segment is 0.5-1mm.

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