A workbench structure to prevent encoder oil mist contamination

Abstract

This invention relates to a worktable structure for preventing encoder oil mist contamination, belonging to the field of machine tool equipment technology. It includes an upper worktable body, a base with a cavity located below the worktable body, a motor disposed within the cavity, and an angle encoder mounted on the base. The motor rotor is connected to the worktable body, and the motor stator is connected to the base. The top of the base has a groove facing the cavity, and the grating drum and reading head of the angle encoder are installed in the groove. The signal line of the angle encoder passes through the base and exits from the bottom of the base. An airtight seal is used between the worktable body and the base. This invention places the angle encoder inside the upper part of the worktable. When the encoder needs to be inspected or repaired, only the worktable body located on top of the worktable needs to be removed, greatly improving the convenience of maintenance. Furthermore, the airtight seal effectively prevents the encoder from being contaminated and triggering alarms, reducing the encoder failure rate.

Description

Technical Field

[0001] This invention belongs to the field of machine tool equipment technology and relates to a worktable structure that prevents encoder oil mist contamination. Background Technology

[0002] Angle encoders are essential for precision machine tool worktables, used to accurately control rotational angular displacement and ensure machining accuracy. Traditional worktable structures place the angle encoder at the bottommost mounting plate inside the worktable. This location lacks airtight protection, making it susceptible to leakage from hydraulic oil in the worktable cylinders, cooling oil in the motor stator, and bearing grease. Environmental contaminants such as oil and dust can also contaminate the reading head and grating drum, causing encoder malfunctions, machine tool alarms, and disrupting normal production. Furthermore, maintenance is difficult due to the encoder's location at the bottom of the worktable; inspection and replacement often require disassembling the entire worktable, resulting in significant workload, operational difficulty, long processing times, and low efficiency. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a worktable structure that prevents encoder oil mist contamination, so as to facilitate the maintenance of angle encoders.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A workbench structure for preventing encoder oil mist contamination includes an upper workbench body, a base located below the workbench body and having a cavity, a motor disposed in the cavity, and an angle encoder mounted on the base. The rotor of the motor is connected to the workbench body, and the stator of the motor is connected to the base. The top of the base has a groove facing the cavity. The grating drum and reading head of the angle encoder are installed in the groove. The signal line of the angle encoder passes through the base and exits from the bottom of the base. An air seal is used between the workbench body and the base.

[0006] Optionally, a sealing gap is formed between the workbench body and the base, and the base is provided with an air inlet that communicates with the sealing gap. The other end of the air inlet extends to the bottom of the base to enable air to pass through from the bottom of the base.

[0007] Optionally, the air seal between the workbench body and the base adopts a stepped sealing gap.

[0008] Optionally, the base is provided with a wire passage hole so that the signal line of the angle encoder can be routed out from the bottom of the base along the wire passage hole, and the wire passage hole and the air inlet are located on the two sides of the base respectively.

[0009] Optionally, the base is a split structure, including a first pressure cover, a bushing, a second pressure cover and a third pressure cover arranged sequentially from top to bottom; the first pressure cover corresponds to the mounting position of the grating drum and the reading head of the angle encoder, and the bushing and the second pressure cover correspond to the mounting positions of the upper bearing and the lower bearing supporting the motor rotor, respectively.

[0010] Optionally, the first pressure cap and the bushing, the bushing and the second pressure cap, and the second pressure cap and the third pressure cap are all detachable connections.

[0011] Optionally, the rotor shaft of the motor is provided with an oil passage, and the oil passage of the motor rotor shaft is connected to the oil passage of the worktable body.

[0012] The beneficial effects of this invention are as follows: the angle encoder is located inside the upper part of the workbench. When it is necessary to inspect and repair the encoder, only the workbench body located on the top of the workbench needs to be removed, which greatly improves the convenience of maintenance. Furthermore, through reliable airtight protection, it effectively avoids the encoder from being contaminated and alarms, thus reducing the encoder failure rate.

[0013] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a schematic diagram of a workbench structure for preventing encoder oil mist contamination according to the present invention. Figure 1 ;

[0016] Figure 2 for Figure 1 AA section view;

[0017] Figure 3 This is a schematic diagram of a workbench structure for preventing encoder oil mist contamination according to the present invention. Figure 2 .

[0018] Reference numerals in the attached drawings: 1. Worktable body; 2. Reading head; 3. Grating drum; 4. First pressure cover; 5. Bushing; 6. Upper bearing; 7. Motor; 8. Second pressure cover; 9. Third pressure cover; 10. Reading head connector; 19. Lower bearing; 25. Oil distribution shaft; 27. First pressure cover wire hole; 28. Bushing wire hole; 29. ​​Second pressure cover wire hole; 30. First pressure cover air inlet; 31. Bushing air inlet; 32. Second pressure cover air inlet; 33. Third pressure cover wire hole; 34. Groove; 35. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] Please see Figures 1-3 A workbench structure for preventing encoder oil mist contamination includes an upper workbench body 1, a base located below the workbench body 1 and having a cavity, a motor 7 disposed in the cavity, and an angle encoder mounted on the base. The rotor of the motor 7 is connected to the workbench body 1, and the stator of the motor 7 is connected to the base. The top of the base is provided with a groove 35 facing the cavity. The grating drum 3 and the reading head 2 of the angle encoder are installed in the groove 35. The signal line of the angle encoder passes through the base and exits from the bottom of the base.

[0023] The present invention installs the grating drum 3 and the reading head 2 of the angle encoder on the lower side of the workbench body 1. When it is necessary to inspect and repair the encoder, only the workbench body 1 needs to be removed, which is convenient for encoder maintenance.

[0024] To prevent oil contamination of the encoder, a sealing structure is provided between the worktable body 1 and the base. This sealing mechanism can be an airtight seal. Specifically, a sealing gap is formed between the worktable body 1 and the base, preferably a stepped sealing gap. An air inlet is provided on the base, communicating with the sealing gap, and the other end of the air inlet extends to the bottom of the base to allow air to pass through. This sealing structure effectively prevents oil contamination from entering, keeping the encoder clean and significantly reducing the encoder's failure rate.

[0025] To facilitate bearing installation, the base of this invention adopts a split structure, comprising a first pressure cover 4, a bushing 5, a second pressure cover 8, and a third pressure cover 9 arranged sequentially from top to bottom. The first pressure cover 4 corresponds to the mounting positions of the grating drum 3 and the reading head 2 of the angle encoder. The bushing 5 and the second pressure cover 8 correspond to the mounting positions of the upper bearing 6 and the lower bearing 19 supporting the rotor of the motor 7, respectively. The connections between the first pressure cover 4 and the bushing 5, between the bushing 5 and the second pressure cover 8, and between the second pressure cover 8 and the third pressure cover 9 are all detachable. The reading head connector 10 is installed on the bottom surface of the third pressure cover 9. This split structure facilitates the installation and maintenance of the encoder and bearings.

[0026] Optionally, the rotor shaft of the motor 7 is provided with an oil passage, which is connected to the oil passage of the worktable body 1. An oil distribution shaft 25 is provided below the base, and the oil distribution shaft 25 is detachably connected to the rotor shaft of the motor 7 by screws. The oil passage of the oil distribution shaft 25 is connected to the oil passage of the rotor shaft of the motor 7. The base is provided with wire passage holes to allow the signal wire of the angle encoder to exit from the bottom of the base along the wire passage holes. The wire passage holes are vertically arranged and include a first pressure cover wire passage hole 27 on the first pressure cover 4, a bushing wire passage hole 28 on the bushing 5, a second pressure cover wire passage hole 29 on the second pressure cover 8, and a third pressure cover wire passage hole 34 on the third pressure cover 9. The signal wire passes through the wire passage holes of the first pressure cover 4, bushing 5, second pressure cover 8, and third pressure cover 9 in sequence, exiting from the bottom of the worktable. The wire passage holes and the air inlet are located on opposite sides of the base. The air inlet is... The structure is vertically arranged and includes a first pressure cover air inlet 30 on the first pressure cover 4, a bushing air inlet 31 on the bushing 5, a second pressure cover air inlet 32 ​​on the second pressure cover 8, and a third pressure cover air inlet 33 on the third pressure cover 9. Compressed air enters the first pressure cover air inlet 30 on the first pressure cover 4 through the third pressure cover air inlet 33 on the third pressure cover 9, the second pressure cover air inlet 32 ​​on the second pressure cover 8, and the bushing air inlet 31 on the bushing 5, so that the gap between the worktable body 1 and the first pressure cover 4 forms an airtight protection.

[0027] This invention places the angle encoder inside the upper part of the workbench. When the encoder needs to be inspected or repaired, only the workbench needs to be removed, which greatly improves the convenience of maintenance. Furthermore, through reliable airtight protection, it effectively avoids the encoder from being contaminated and alarms, thus reducing the encoder's failure rate.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A workbench structure for preventing encoder oil mist contamination, comprising an upper workbench body (1), a base located below the workbench body (1) and having a cavity, a motor disposed within the cavity, and an angle encoder mounted on the base, wherein the rotor of the motor is connected to the workbench body (1), and the stator of the motor is connected to the base, characterized in that: The base has a groove facing the cavity on the top. The grating drum (3) and reading head (2) of the angle encoder are installed in the groove. The signal line of the angle encoder passes through the base and comes out from the bottom of the base. The worktable body (1) and the base are sealed with air. A sealing gap is formed between the workbench body (1) and the base. An air inlet is provided on the base that communicates with the sealing gap. The other end of the air inlet extends to the bottom of the base to allow air to pass through from the bottom of the base. The air seal between the workbench body (1) and the base adopts a stepped sealing gap. The base is provided with a wire passage hole so that the signal line of the angle encoder can be routed out from the bottom of the base along the wire passage hole. The wire passage hole and the air inlet are located on the two sides of the base respectively. The base is a split structure, including a first pressure cover (4), a bushing (5), a second pressure cover (8) and a third pressure cover (9) arranged sequentially from top to bottom. The first pressure cover (4) corresponds to the installation position of the grating drum (3) and the reading head (2) of the angle encoder. The bushing (5) and the second pressure cover (8) correspond to the installation positions of the upper bearing and the lower bearing supporting the motor rotor respectively. The first pressure cover (4) and the bushing (5), the bushing (5) and the second pressure cover (8), and the second pressure cover (8) and the third pressure cover (9) are all detachably connected.

2. The workbench structure for preventing encoder oil mist contamination according to claim 1, characterized in that: The rotor shaft of the motor is equipped with an oil passage, which is connected to the oil passage of the worktable body (1).

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