Lead screw driving type precision displacement stage

Abstract

The utility model discloses a precision displacement platform of screw drive type belongs to displacement platform technical field, including displacement subassembly, and its technical scheme main point is through the design of automatic oiling subassembly, realized automatic lubrication to screw drive system, telescopic link pushes the sliding board, under the guidance of sliding rod drives extruding rod extruding the piston in sliding sleeve, makes lubricating oil through the communication pipe, fixed connection mouth and enters sliding shell, and the oil guide groove of cooperation sliding displacement platform lower extreme can even deliver lubricating oil to screw and the interlock of screw sleeve, avoid the cumbersome operation and instability of artificial lubrication, guarantee lubrication timeliness and evenness, effectively reduce friction, prolong the service life of screw and screw sleeve, improve displacement platform movement accuracy simultaneously, through adopting the combination drive mode of worm wheel and worm, servo motor drives the worm drive worm wheel, and then makes screw rotate, and worm wheel and worm transmission have self -locking function.

Description

Technical Field

[0001] This utility model relates to the field of displacement stage technology, and more specifically, to a screw-driven precision displacement stage. Background Technology

[0002] Widely used in fields with extremely high displacement accuracy requirements, such as optical instruments, semiconductor manufacturing, precision measurement, and automated equipment, its core working principle is based on the meshing transmission between the lead screw and the threaded sleeve or nut. When the lead screw rotates under the drive of a drive device such as a servo motor, the threaded sleeve meshing with the lead screw will generate linear motion along the axis of the lead screw. The threaded sleeve is usually fixedly connected to the moving parts of the displacement table, such as a sliding table, thereby driving the load to achieve precise positional movement.

[0003] However, traditional lead screw-driven precision displacement stages have certain drawbacks in long-term use. For example, lead screw drives require regular lubrication to reduce friction, improve service life and motion accuracy. However, manual lubrication is not only cumbersome and inefficient, but also difficult to guarantee the uniformity and timeliness of lubrication, which can easily lead to insufficient or excessive lubrication, thereby affecting the motion accuracy of the displacement stage and the service life of the lead screw. At the same time, some existing automatic lubrication structures are complex and inconvenient to install and maintain, increasing the cost and difficulty of use of the displacement stage. In addition, in some precision operation scenarios with strict environmental requirements, manual lubrication may also lead to lubricating oil leakage, polluting the working environment and affecting the normal operation of precision instruments.

[0004] Therefore, a lead screw driven precision displacement stage is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a screw-driven precision displacement stage. Through the design of an automatic oiling component, automatic lubrication of the screw transmission system is achieved. A telescopic rod pushes a sliding plate, which, guided by the sliding rod, drives a pressing rod to compress the piston inside the sliding sleeve. This allows lubricating oil to enter the sliding housing through a connecting pipe and a fixed connection port. Combined with the oil guide groove at the lower end of the sliding stage, the lubricating oil can be evenly delivered to the engagement point between the screw and the sleeve. This avoids the tedious and unstable operation of manual lubrication, ensuring timely and uniform lubrication, effectively reducing friction, extending the service life of the screw and sleeve, and improving the motion accuracy of the displacement stage.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A lead screw driven precision displacement stage includes a displacement assembly and an automatic oiling assembly.

[0008] The displacement component includes:

[0009] Sliding casing;

[0010] The drive housing is fixedly installed at one end of the sliding housing;

[0011] The cover plate is installed and fixedly mounted on the upper end of the drive housing;

[0012] Support legs, two in number, secure the lower end of the sliding outer shell;

[0013] The automatic oiling component includes:

[0014] A fixed connection port is fixedly connected to the lower end of the sliding housing and communicates with the interior of the sliding housing;

[0015] A rectangular limiting ring is fixedly installed at the upper end of the fixed connection port;

[0016] The connecting pipe is connected to the lower end of the fixed connection port.

[0017] Furthermore, the displacement component also includes:

[0018] The lead screw is rotatably mounted inside the sliding housing;

[0019] The worm gear is fixedly installed at one end of the lead screw and is located inside the drive housing;

[0020] The servo motor is fixedly installed inside the drive housing;

[0021] The worm gear is fixedly installed at the output end of the servo motor and meshes with it.

[0022] Furthermore, the displacement component also includes:

[0023] The sliding stage is slidably installed inside the sliding housing.

[0024] Furthermore, the displacement component also includes:

[0025] The threaded sleeve is fixedly installed inside the sliding table and engages with the middle part of the lead screw.

[0026] Furthermore, the automatic oiling assembly also includes:

[0027] A bolt mounting plate is fixedly installed at the lower end of the sliding housing;

[0028] The sliding rod is fixedly installed at one end of the bolt mounting plate.

[0029] Furthermore, the automatic oiling assembly also includes:

[0030] A sliding plate is slidably mounted on one end of a sliding rod;

[0031] A sliding sleeve is fixedly installed in the middle of the bolt mounting plate;

[0032] The piston is slidably mounted inside the sliding sleeve;

[0033] The extrusion rod is fixedly installed at one end of the piston;

[0034] The telescopic rod is fixedly installed at the other end of the bolt mounting plate.

[0035] Furthermore, the automatic oiling assembly also includes:

[0036] A sliding plate is fixedly installed at the output end of the telescopic rod and is fixedly connected to one end of the sliding plate.

[0037] Furthermore, the sliding stage has an overall H-shaped configuration.

[0038] Furthermore, the displacement component also includes:

[0039] Multiple oil guide grooves are provided at the lower end of the sliding table;

[0040] The lower end of the sliding stage is provided with an arc-shaped edge.

[0041] Furthermore, the displacement component also includes:

[0042] Circular bolt mounting holes are provided at the upper end of the sliding table.

[0043] In summary, this utility model has the following beneficial effects:

[0044] (1) This solution achieves automatic lubrication of the lead screw transmission system through the design of an automatic oiling component. The telescopic rod pushes the sliding plate, which in turn drives the extrusion rod to squeeze the piston inside the sliding sleeve under the guidance of the sliding rod. This allows the lubricating oil to enter the sliding housing through the connecting pipe and the fixed connection port, which can evenly deliver the lubricating oil to the meshing point of the lead screw and the sleeve. This avoids the tedious operation and instability of manual lubrication, ensures the timeliness and uniformity of lubrication, effectively reduces friction, extends the service life of the lead screw and the sleeve, and improves the motion accuracy of the displacement table.

[0045] (2) This solution uses a servo motor to drive the worm gear and worm wheel, which in turn makes the lead screw rotate. The worm gear transmission can prevent the sliding table from sliding unexpectedly due to external forces, thus enhancing the stability of the displacement table. Moreover, the transmission structure has a large transmission ratio and runs smoothly, enabling high-precision displacement control. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure in this embodiment;

[0047] Figure 2 This is a schematic diagram of the overall disassembled structure in this embodiment;

[0048] Figure 3This is a schematic cross-sectional view of the sliding outer shell in this embodiment;

[0049] Figure 4 This is a schematic diagram of the overall structure of the automatic oiling component in this embodiment;

[0050] Figure 5 This is a schematic cross-sectional view of the sliding stage in this embodiment.

[0051] The following are the labeling elements in the diagram: 1. Displacement component; 2. Automatic oiling component; 101. Sliding housing; 102. Drive housing; 103. Mounting cover plate; 104. Support leg; 105. Lead screw; 106. Worm gear; 107. Servo motor; 108. Worm; 109. Screw sleeve; 110. Sliding stage; 201. Fixed connection port; 202. Rectangular limit ring; 203. Connecting pipe; 204. Bolt mounting plate; 205. Sliding rod; 206. Sliding plate; 207. Telescopic rod; 208. Sliding sleeve; 209. Extrusion rod. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings.

[0053] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0054] Reference Figures 1 to 5 As shown, this is a screw-driven precision displacement stage according to a preferred embodiment of the present invention, including a displacement assembly 1 and an automatic oiling assembly 2.

[0055] Displacement component 1 includes:

[0056] Sliding housing 101;

[0057] The drive housing 102 is fixedly installed at one end of the sliding housing 101;

[0058] The cover plate 103 is fixedly installed on the upper end of the drive housing 102;

[0059] Support legs 104, two in number, fix the lower end of the sliding outer shell 101;

[0060] Automatic oiling component 2 includes:

[0061] The fixed connection port 201 is fixedly connected to the lower end of the sliding housing 101 and communicates with the interior of the sliding housing 101.

[0062] A rectangular limiting ring 202 is fixedly installed at the upper end of the fixed connection port 201;

[0063] The connecting pipe 203 is connected to the lower end of the fixed connection port 201.

[0064] Displacement component 1 also includes:

[0065] The lead screw 105 is rotatably mounted inside the sliding housing 101;

[0066] The worm gear 106 is fixedly installed at one end of the lead screw 105 and is located inside the drive housing 102;

[0067] The servo motor 107 is fixedly installed inside the drive housing 102;

[0068] The worm gear 108 is fixedly installed at the output end of the servo motor 107 and is meshed with the worm gear 108.

[0069] Displacement component 1 also includes:

[0070] The sliding stage 110 is slidably installed inside the sliding housing 101.

[0071] Displacement component 1 also includes:

[0072] The threaded sleeve 109 is fixedly installed inside the sliding table 110 and is engaged with the middle part of the lead screw 105;

[0073] This solution utilizes a servo motor 107, a worm gear 108, a worm wheel 106, a lead screw 105, and a threaded sleeve 109. The servo motor 107 drives the worm gear 108 to rotate, which in turn drives the worm wheel 106. The worm wheel 106 then rotates the lead screw 105, which in turn engages with the threaded sleeve 109, converting rotational motion into linear motion. This drives the sliding table 110 to slide, achieving precise displacement. The worm wheel 106 and worm gear 108 transmission has a self-locking function to prevent accidental slippage of the sliding table 110, and features a large transmission ratio and smooth operation. The servo motor 107 can precisely control the speed and direction of rotation, and combined with the high-precision machined lead screw 105 and threaded sleeve 109, it ensures high precision and stability of displacement.

[0074] The automatic oiling component 2 also includes:

[0075] Bolt mounting plate 204 is fixedly installed at the lower end of sliding housing 101;

[0076] The sliding rod 205 is fixedly installed at one end of the bolt mounting plate 204.

[0077] The automatic oiling component 2 also includes:

[0078] The sliding plate 206 is slidably mounted on one end of the sliding rod 205;

[0079] The sliding sleeve 208 is fixedly installed in the middle of the bolt mounting plate 204;

[0080] The piston is slidably mounted inside the sliding sleeve 208;

[0081] The compression rod 209 is fixedly installed at one end of the piston;

[0082] The telescopic rod 207 is fixedly installed at the other end of the bolt mounting plate 204.

[0083] The automatic oiling component 2 also includes:

[0084] The sliding plate 206 is fixedly installed at the output end of the telescopic rod 207 and is fixedly connected to one end of the sliding plate 206;

[0085] This solution incorporates an automatic lubrication assembly 2, including a telescopic rod 207, a sliding plate 206, a sliding rod 205, a sliding sleeve 208, a piston, and a pressing rod 209. The telescopic rod 207 pushes the sliding plate 206 to slide along the sliding rod 205. The sliding plate 206 then drives the pressing rod 209 to press the piston inside the sliding sleeve 208, forcing lubricating oil into the sliding housing 101 through the connecting pipe 203 and the fixed connection port 201. Simultaneously, the oil guide groove and arc-shaped edge at the lower end of the sliding stage 110 can evenly guide the lubricating oil to the meshing point between the lead screw 105 and the threaded sleeve 109, achieving automatic lubrication. This avoids the tediousness and instability of manual lubrication, reduces friction, and extends the service life of components.

[0086] The sliding stage 110 has an overall H-shaped configuration.

[0087] Displacement component 1 also includes:

[0088] Multiple oil guide grooves are provided at the lower end of the sliding table 110;

[0089] The lower end of the sliding stage 110 is set with an arc-shaped edge.

[0090] Displacement component 1 also includes:

[0091] A circular bolt mounting hole is provided at the upper end of the sliding table 110.

[0092] Specific implementation process: First, the servo motor 107 serves as the power source, driving the worm gear 108 to rotate after being powered on. The worm gear 108 meshes with the worm wheel 106, transmitting power to the worm wheel 106. Due to the large transmission ratio characteristic of the worm wheel 106 and worm gear 108 transmission, stable and precise speed conversion can be achieved. The worm wheel 106 is fixedly connected to the lead screw 105. The rotation of the worm wheel 106 drives the lead screw 105 to rotate within the sliding housing 101. The threaded sleeve 109 fixed inside the sliding stage 110 meshes with the middle of the lead screw 105. According to the lead screw and nut transmission principle, the rotational motion of the lead screw 105 is converted into linear motion of the threaded sleeve 109 and the sliding stage 110 along the axial direction of the lead screw 105, thereby achieving precise displacement adjustment of the load within the sliding housing 101. The telescopic rod 207 is then activated. Then, its output end pushes the sliding plate 206 to slide along the sliding rod 205. The sliding rod 205 plays a guiding role to ensure the stability and accuracy of the movement of the sliding plate 206. When the sliding plate 206 moves, it drives the pressing rod 209 to move synchronously. The pressing rod 209 pushes the piston in the sliding sleeve 208. The piston is compressed, and the lubricating oil in the sliding sleeve 208 is pressed into the sliding housing 101 through the connecting pipe 203 and the fixed connection port 201. The oil guide groove and arc edge design at the lower end of the sliding stage 110 enable the lubricating oil flowing into the sliding housing 101 to be evenly distributed along the groove and guided to the meshing point of the lead screw 105 and the screw sleeve 109, realizing automatic lubrication of the transmission components, reducing friction loss, and ensuring the high-precision operation and long-term stable operation of the displacement stage.

[0093] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lead screw driven precision displacement stage, comprising a displacement assembly (1) and an automatic oiling assembly (2), characterized in that: The displacement component (1) includes: Sliding housing (101); The drive housing (102) is fixedly installed at one end of the sliding housing (101); The mounting cover (103) is fixedly installed on the upper end of the drive housing (102); Support legs (104), two in number, fix the lower end of the sliding shell (101); The automatic oiling assembly (2) includes: The fixed connection port (201) is fixedly connected to the lower end of the sliding housing (101) and communicates with the interior of the sliding housing (101); A rectangular limiting ring (202) is fixedly installed at the upper end of the fixed connection port (201); The connecting pipe (203) is connected to the lower end of the fixed connection port (201).

2. The screw-driven precision displacement stage according to claim 1, characterized in that: The displacement component (1) further includes: The lead screw (105) is rotatably mounted inside the sliding housing (101); The worm gear (106) is fixedly installed at one end of the lead screw (105) and located inside the drive housing (102); The servo motor (107) is fixedly installed inside the drive housing (102); The worm gear (108) is fixedly installed at the output end of the servo motor (107) and meshes with the worm gear (108).

3. The screw-driven precision displacement stage according to claim 1, characterized in that: The displacement component (1) further includes: The sliding stage (110) is slidably mounted inside the sliding housing (101).

4. The lead screw driven precision displacement stage according to claim 1, characterized in that: The displacement component (1) further includes: The threaded sleeve (109) is fixedly installed inside the sliding stage (110) and meshes with the middle part of the lead screw (105).

5. A lead screw driven precision displacement stage according to claim 4, characterized in that: The automatic oiling assembly (2) also includes: A bolt mounting plate (204) is fixedly installed on the lower end of the sliding housing (101); The sliding rod (205) is fixedly installed at one end of the bolt mounting plate (204).

6. A lead screw driven precision displacement stage according to claim 4, characterized in that: The automatic oiling assembly (2) also includes: A sliding plate (206) is slidably mounted on one end of a sliding rod (205); A sliding sleeve (208) is fixedly installed in the middle of the bolt mounting plate (204); The piston is slidably mounted inside the sliding sleeve (208); The extrusion rod (209) is fixedly installed at one end of the piston; The telescopic rod (207) is fixedly installed at the other end of the bolt mounting plate (204).

7. A lead screw driven precision displacement stage according to claim 4, characterized in that: The automatic oiling assembly (2) also includes: The sliding plate (206) is fixedly installed at the output end of the telescopic rod (207) and is fixedly connected to one end of the sliding plate (206).

8. A lead screw driven precision displacement stage according to claim 3, characterized in that: The sliding stage (110) has an overall H-shaped configuration.

9. A lead screw driven precision displacement stage according to claim 1, characterized in that: The displacement component (1) further includes: Multiple oil guide grooves are provided at the lower end of the sliding stage (110); The lower end of the sliding stage (110) is provided with an arc-shaped edge.

10. A lead screw driven precision displacement stage according to claim 1, characterized in that: The displacement component (1) further includes: A circular bolt mounting hole is provided at the upper end of the sliding table (110).

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