Split housing for a magnetic grid sensor

Abstract

The utility model discloses a kind of split type shell of magnetic grid sensor, belong to the technical field of magnetic grid sensor.The split type shell includes the first split shell and the second split shell of identical structure, and the plug-in cooperation structure of the engagement of both.The plug-in cooperation structure includes the cylindrical body and the jack on the split shell, and the outer diameter of cylindrical body is greater than the inner diameter of jack to form interference fit.The first split shell both sides are equipped with cylindrical body and second jack, and the cylindrical body and second jack of its both sides are mirror image distribution in upside-down opposite, so that two split shells can be realized only correct mistake-proof assembly by turning over.The utility model is through the interference plug-in cooperation of two sides bidirectional, realized the firm connection of no fastener, greatly reduced processing cost and assembly difficulty, while guarantee the structural stability and impact resistance of shell.

Description

Technical Field

[0001] This utility model relates to the field of magnetic grating sensors, specifically to a split housing for a magnetic grating sensor. Background Technology

[0002] As a high-precision displacement detection device, magnetic grating sensors are widely used in machine tools, automated production lines, precision instruments and other fields. Their housing, as the external protection and internal component support structure of the sensor, has an important impact on structural stability, processing convenience and cost control.

[0003] Existing magnetic grating sensor housings mostly adopt a one-piece structure, formed through integral injection molding, die casting, or machining. This structure has the following drawbacks: Firstly, a one-piece housing requires the design of dedicated molds or machining fixtures for the overall contour, resulting in high mold complexity and development costs. Furthermore, the machining process requires simultaneous precision control of both the inner and outer cavities of the housing, making processing difficult and time-consuming. Secondly, the material utilization rate of one-piece housings is low, especially for housings with complex internal cavity structures, generating a significant amount of waste during processing, further increasing the unit processing cost. These issues lead to persistently high processing costs for existing magnetic grating sensor housings, hindering the widespread adoption of magnetic grating sensors in low- to mid-range applications. Utility Model Content

[0004] In view of the above, the purpose of this utility model is to provide a split housing for a magnetic grating sensor to address the problems of the prior art.

[0005] This solution discloses a split-type housing for a magnetic grating sensor, comprising a first housing, a second housing, and a plug-in fitting structure for joining the first and second housings. The first and second housings are structurally identical, requiring only one processing step to manufacture both types of housings, significantly reducing manufacturing costs. The plug-in fitting structure includes a columnar body on the first housing and a socket on the second housing that mates with the columnar body. The outer diameter of the columnar body is larger than the inner diameter of the socket. During assembly, the columnar body is pressed into the socket to form an interference fit, achieving tight fixation of the two housings without the need for additional fasteners.

[0006] To avoid uneven stress on one side after the shell is assembled and to improve structural stability, the first sub-shell is provided with columnar bodies on both opposite sides, and the second sub-shell is provided with insertion holes on both opposite sides corresponding to the columnar bodies. Through the double-sided insertion and cooperation, the two sub-shells are ensured to be stressed in a balanced manner after assembly, avoiding shell deformation or loosening caused by unilateral connection.

[0007] To further optimize connection reliability and assembly convenience, the plug-in mating structure also includes second plug holes on both sides of the first sub-shell and second columnar bodies on both sides of the second sub-shell; that is, each side of the first sub-shell has a combination structure of columnar body and second plug hole, and each side of the second sub-shell has a combination structure of plug hole and second columnar body. The two sub-shells are fixed in multiple ways through bidirectional plugging, thereby improving the connection strength.

[0008] The columnar body and the second insertion hole on the first side of the first sub-shell are vertically distributed, and the vertical position relationship between the columnar body and the second insertion hole on the second side of the first sub-shell is opposite to that on the first side. The positional distribution of the second columnar body and the insertion hole of the second sub-shell is perfectly adapted to the first sub-shell, allowing the first and second sub-shells to achieve complementary insertion through mirror flipping. This design firstly serves as a mistake-proof design, avoiding assembly errors. Moreover, the asymmetrical distribution of the columns and holes distributes the pressure generated during press-fitting and the stress from external forces during subsequent operation across the entire shell, avoiding excessive local stress, ensuring the rigidity and long-term stability of the connection, and better resisting vibration and impact.

[0009] To reduce the assembly resistance of the interference fit and avoid damage to components during assembly, the ends of the columnar body and the second columnar body are provided with guide cone surfaces. The guide cone surfaces can guide the columnar body to accurately enter the insertion hole during press fitting, reduce friction and collision between the columnar body and the edge of the insertion hole, and at the same time reduce the pressure required for assembly, thereby improving assembly efficiency and pass rate.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The first and second shells have the same structure and can be produced with only one set of molds and one set of processing technology. Compared with the special molds and complex processes required for an integrated shell, the overall processing cost is effectively reduced.

[0011] The use of an interference fit plug structure, combined with a double-sided, bidirectional plug design, ensures that there is no looseness or gap after the housing is assembled. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 , Figure 3 These are exploded views of the structure from different perspectives in this application; Figure 4 This is a schematic diagram comparing this application with a magnetic ruler; Reference numerals: First sub-shell 1, columnar body 101, second insertion hole 102, second sub-shell 2, insertion hole 201, second columnar body 202. Detailed Implementation

[0013] 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.

[0014] Example 1: This embodiment provides a split housing for a magnetic grating sensor.

[0015] The housing is assembled from a first sub-housing 1 and a second sub-housing 2 with identical structures via a plug-in fitting structure. Both the first sub-housing 1 and the second sub-housing 2 can be injection molded using the same set of molds, greatly reducing mold development costs and unit production costs. The overall thickness of the first sub-housing 1 and the second sub-housing 2 after fixing is 10±0.5mm, the same thickness as the magnetic ruler.

[0016] The insertion and mating structure includes two columnar bodies 101 disposed on opposite sides of the first sub-shell 1, and two insertion holes 201 disposed on opposite sides of the second sub-shell 2. The columnar bodies 101 are solid cylinders, and their outer diameter is slightly larger than the inner diameter of the insertion holes 201 to form an interference fit.

[0017] During assembly, the operator does not need to distinguish between the first sub-shell 1 and the second sub-shell 2. They simply align the columnar body 101 on one sub-shell with the insertion hole 201 on the other sub-shell and apply pressure for press-fitting. Under pressure, the columnar body 101 inserts into and tightens the insertion hole 201. The significant friction generated by the interference fit firmly connects the first sub-shell 1 and the second sub-shell 2 into a single unit, eliminating the need for screws, clips, or other additional fasteners, thus simplifying the assembly process.

[0018] Example 2: This embodiment is a further optimization based on Embodiment 1.

[0019] In this embodiment, each side of the first sub-shell 1 is provided with not only the columnar body 101, but also a second insertion hole 102. Similarly, each side of the second sub-shell 2 is provided with not only the insertion hole 201, but also a second columnar body 202. That is, each side of each sub-shell forms a composite connecting unit including a protrusion and a recess.

[0020] Furthermore, the columnar body 101 and the second insertion hole 102 on the first side of the first sub-shell 1 are distributed vertically, specifically, the columnar body 101 is located above and the second insertion hole 102 is located below. The vertical distribution relationship of the columnar body 101 and the second insertion hole 102 on the second side of the first sub-shell 1 is completely opposite to that on the first side, that is, the columnar body 101 is located below and the second insertion hole 102 is located above.

[0021] Since the first housing 1 and the second housing 2 are structurally identical, the distribution of the second columnar body 202 and the insertion hole 201 on the second housing 2 is perfectly matched and mirror-symmetrical with that of the first housing 1. This means that the two identical housings must be rotated 180 degrees to achieve the only correct insertion alignment. This unique "mirror-complementary" design constitutes a natural error-proofing mechanism, fundamentally eliminating the problem of incorrect assembly direction.

[0022] During assembly, the two housings are mirror-aligned, and the columnar bodies 101 on both sides are simultaneously pressed into their corresponding insertion holes 201. This bidirectional, multi-point interference fit connection greatly increases the connection strength and reliability. The symmetrical pressing force ensures that the stress is evenly distributed across the entire housing, avoiding localized stress concentration and significantly improving the housing's resistance to vibration and impact, thus ensuring the long-term measurement accuracy of the sensor under harsh operating conditions.

[0023] Furthermore, both the ends of the columnar body 101 and the second columnar body 202 are machined with guide cone surfaces. These guide cone surfaces can guide the columnar body 101 smoothly into the insertion hole 201 during the initial press-fitting stage, effectively preventing jamming or damage to parts caused by misalignment, reducing the pressure required for assembly, and making it possible to assemble by hand or using simple tooling, further improving production efficiency and assembly yield.

[0024] 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. A split-type housing for a magnetic grating sensor, characterized in that: It includes a first sub-shell (1), a second sub-shell (2), and a plug-in fitting structure that connects the two; the plug-in fitting structure includes a columnar body (101) disposed on the first sub-shell (1) and a socket (201) disposed on the second sub-shell (2), the columnar body (101) and the socket (201) form an interference fit, and the first sub-shell (1) and the second sub-shell (2) are fixedly connected by inserting the columnar body (101) into the socket (201).

2. The split housing of a magnetic grating sensor according to claim 1, characterized in that: The first sub-shell (1) has columnar bodies (101) on both sides, and the second sub-shell (2) has insertion holes (201) on both sides that cooperate with the columnar bodies (101).

3. The split housing of a magnetic grating sensor according to claim 2, characterized in that: The plug-in mating structure also includes second plug holes (102) on both sides of the first sub-shell (1) and second columnar bodies (202) on both sides of the second sub-shell (2).

4. The split housing of a magnetic grating sensor according to claim 3, characterized in that: The column (101) and the second insertion hole (102) on the first side of the first sub-shell (1) are distributed vertically, and the vertical position relationship between the column (101) and the second insertion hole (102) on the second side is opposite to that on the first side; the position distribution of the second column (202) and the insertion hole (201) of the second sub-shell (2) is adapted to the first sub-shell (1).

5. The split housing of a magnetic grating sensor according to claim 4, characterized in that: The ends of the column (101) and the second column (202) are provided with guide cone surfaces.

6. The split housing of a magnetic grating sensor according to claim 4, characterized in that: The overall thickness of the first sub-shell (1) and the second sub-shell (2) after fixing is 10±0.5mm.

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