Adjustable linear guide rail sliding table
By introducing spring telescopic rods, memory alloy springs and efficient heat dissipation structures into the linear guide rail slide table, dynamic adjustment of preload and heat dissipation is achieved, thermal expansion and load adaptability problems are solved, and the accuracy and service life of the slide table are improved.
Patent Information
- Application Number
- CN202510013538.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-05-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing linear guide rail slide tables have thermal expansion of the screw due to heat accumulation during long working hours, which affects the motion accuracy and service life. The preload adjustment is not flexible enough and it is difficult to adapt to different load conditions.
An adjustable linear guide rail slide platform is designed, using a pre-tension adjustment mechanism of spring telescopic rod, carrier plate and memory alloy spring, combined with a hollow limiting rod and an efficient heat dissipation structure to achieve dynamic adjustment of pre-tension force and heat dissipation.
By dynamically adjusting the preload force, the slide platform can maintain transmission accuracy under different load conditions, avoid wear caused by thermal expansion, extend service life, and reduce the risk of thermal expansion through an efficient heat dissipation system to ensure the continuous accuracy and stability of the slide platform.
Smart Images
Figure CN120038571A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of guide rail slider devices, and particularly to an adjustable linear guide rail slider. Background Art
[0002] A linear guide rail slider is a high-precision linear motion device that realizes the linear motion of an object through the movement of a slider on a guide rail. The main functions of a linear guide rail slider are to achieve high-precision and high-speed linear motion. It can bear large loads and has the characteristics of long service life and low noise. These devices are widely used in fields such as industrial automation, numerical control machine tools, and semiconductor manufacturing. For example, in numerical control machine tools, they are used for the precise positioning and machining of workpieces, and in semiconductor manufacturing equipment, they are used for the precise movement and positioning of wafers.
[0003] The design of a linear guide rail slider needs to consider various factors to ensure its performance in actual applications. For example, appropriate preloading force is crucial for the performance of a linear guide rail slider. The preloading force helps to reduce the clearance between the balls and the lead screw inside the slider, ensuring the smoothness and accuracy of the movement, avoiding vibrations and noises generated during movement, and thus providing a smoother movement performance. In addition, the preloading force can also reduce the wear of the slider and the guide rail, extending their service life.
[0004] However, with long-term operation, the friction between the lead screw and the slider will generate a large amount of heat. If the heat is not dissipated in time, it will affect the service life. The continuous accumulation of heat will cause the lead screw to thermally expand, thereby reducing the clearance between the balls and the slider, increasing the friction, and further increasing the generation of heat and wear. This not only affects the conveying work but also reduces the service life.
[0005] Therefore, during the design and use of a linear guide rail slider, it is necessary to carefully consider the adjustment of the preloading force and the heat dissipation measures to ensure that it can maintain the best performance under various working conditions. This includes selecting an appropriate preloading force to balance the movement accuracy and system wear, and designing an effective heat dissipation system to prevent performance degradation and shortened service life caused by overheating.
[0006] In view of the above problems, there is an urgent need to innovate and design on the basis of the original guide rail slider. Summary of the Invention
[0007] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solutions are too single, so as to solve the problems raised in the above background art.
[0008] To achieve the above object, the present invention provides the following technical solution: An adjustable linear guide slide table, comprising a base, on both sides of the top of the base are respectively connected with a side plate, and a driving motor is installed outside one of the side plates. The output end of the driving motor is provided with a lead screw, and the other end of the lead screw is rotatably connected to the other side plate. A slider is sleeved outside the lead screw, and there are balls between the slider and the lead screw. The top of the slider is connected with a spring telescopic rod, and the upper end of the spring telescopic rod is connected with a bearing plate. There is a pre-tightening structure between the bottom of the bearing plate and the slider. The two sides of the slider are slidably connected through hollow limiting rods, and the two ends of the hollow limiting rods are respectively connected to the two side plates. And there is a heat dissipation structure between the side plate and the base, and the heat dissipation structure communicates with the hollow limiting rod.
[0009] Preferably, the base is arranged in a hollow structure, and the base and the side plates form a "concave" structure.
[0010] Preferably, the adjustable pre-tightening structure includes an opening, a pre-tightening block, a cylinder body, and a shape memory alloy spring. An opening is provided at the top of the slider, and a pre-tightening block is arranged in the opening, and the upper end of the pre-tightening block is located inside the cylinder body. The top of the cylinder body is connected to the bottom of the bearing plate. A number of shape memory alloy springs are connected between the inner end of the pre-tightening block in the cylinder body and the inner bottom of the cylinder body.
[0011] Preferably, both the upper and lower ends of the pre-tightening block are arranged in a "T" shape, and an arc-shaped channel that fits the balls is provided on the end face of the lower end of the pre-tightening block.
[0012] Preferably, the heat dissipation structure includes a water flow channel, a paddle wheel disc, a connecting shaft, a fan assembly, a chain, a deflector, and heat dissipation fins. A water flow channel communicating with the base is provided in each side plate, and a paddle wheel disc is arranged in the water flow channel of the side plate where the driving motor is installed, and a connecting shaft is connected to the paddle wheel disc. One end of the connecting shaft penetrates the inner outer wall of the side plate and is connected with a fan assembly, and the other end of the connecting shaft penetrates the outer outer wall of the side plate and is connected to the output end of the driving motor through a sprocket and a chain. A number of deflectors are arranged in the base, and a number of heat dissipation fins are installed on the top of the base corresponding to the deflectors.
[0013] Preferably, the deflectors are arranged in a zigzag pattern alternately in the base. The upper ends of the heat dissipation fins and the fan assembly are at the same horizontal plane, and the lower ends of the heat dissipation fins are located between the deflectors in the base.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: For this adjustable linear guide slide table, through the spring telescopic rod, the bearing plate, and a precise pre-tightening adjustment mechanism, the slide table can automatically adapt to the weight change of the object on the bearing plate. When the load weight increases, the spring telescopic rod deforms correspondingly according to the pressure. This change adjusts the distance between the bearing plate and the slider, and then finely adjusts the limiting degree of the pre-tightening block on the ball. This way of dynamically adjusting the pre-tightening force adaptively adjusts the pre-tightening force among the slider, the ball, and the lead screw when carrying objects of different weights, maintaining the transmission accuracy of the ball screw. When carrying heavy objects, the increased pre-tightening force helps to offset the deformation of the ball screw caused by the increased load, thus maintaining the precise operation of the slide table.
[0015] In addition, this slide table is also specially designed with a shape memory alloy spring to address the thermal management challenges during high-load operation. When the heat rapidly accumulated by the lead screw due to high load is greater than the heat dissipation effect of the heat dissipation structure, the heat that cannot be immediately discharged accumulates on the lead screw, causing the lead screw to undergo slight thermal expansion. The heat will be transferred and trigger the deformation of the shape memory alloy spring, prompting the pre-tightening block to move towards the bearing block to adapt to this thermal expansion. This adaptation adjustment mechanism avoids accelerated wear due to the inability of the pre-tightening force to adapt to the adjustment and a relatively large pre-tightening force when the lead screw undergoes thermal expansion, thus extending the service life of the slide table.
[0016] To more effectively solve the heat dissipation problem, the slide table adopts a hollow limiting rod and an advanced heat dissipation structure. When the drive motor drives the lead screw to rotate, through the transmission of the chain and sprocket, the connecting shaft is simultaneously driven to rotate, and then the paddle wheel disc and the fan assembly rotate. This rotational movement drives the coolant in the base to circulate in the water flow groove and the hollow limiting rod, achieving heat conduction of the heat generated by the lead screw and the slider. After the coolant absorbs the heat on the slider and the lead screw through heat conduction with the hollow limiting rod, it is transferred to the heat dissipation fins. The rotation of the fan assembly further promotes the dissipation of the heat on the heat dissipation fins, taking away the heat through air flow, achieving an efficient heat dissipation and cooling effect. The design of this heat dissipation system effectively reduces the risk of thermal expansion of the lead screw during long-term operation, thus ensuring the continuous accuracy and stability of the slide table. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a front view sectional structure schematic diagram of the present invention; Figure 2 For the present invention Figure 1 The enlarged structure schematic diagram at A in; Figure 3 It is a front view structure schematic diagram of the present invention; Figure 4 It is a top view structure schematic diagram of the present invention; Figure 5 It is a top view structure schematic diagram of the deflector of the present invention; Figure 6 This is a schematic three-dimensional structure diagram of the blade disc of the present invention.
[0018] In the figure: 1, base; 2, side plate; 3, drive motor; 4, lead screw; 5, slider; 6, ball; 7, spring telescopic rod; 8, bearing plate; 9, adjustable pre-tightening structure; 901, opening; 902, pre-tightening block; 903, cylinder; 904, shape memory alloy spring; 10, hollow limiting rod; 11, heat dissipation structure; 1101, water flow groove; 1102, blade disc; 1103, connecting shaft; 1104, fan assembly; 1105, chain; 1106, guide plate; 1107, heat dissipation fin. Specific embodiments
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0020] Please refer to Figures 1-6 , the present invention provides a technical solution: an adjustable linear guide slide table, including a base 1, a side plate 2, a drive motor 3, a lead screw 4, a slider 5, a ball 6, a spring telescopic rod 7, a bearing plate 8, an adjustable pre-tightening structure 9, an opening 901, a pre-tightening block 902, a cylinder 903, a shape memory alloy spring 904, a hollow limiting rod 10, a heat dissipation structure 11, a water flow groove 1101, a blade disc 1102, a connecting shaft 1103, a fan assembly 1104, a chain 1105, a guide plate 1106, and a heat dissipation fin 1107. On both sides of the top of the base 1, a side plate 2 is connected respectively, and a drive motor 3 is installed outside one side plate 2. The output end of the drive motor 3 is installed with a lead screw 4, and the other end of the lead screw 4 is rotatably connected to the other side plate 2. A slider 5 is sleeved outside the lead screw 4, and a ball 6 is provided between the slider 5 and the lead screw 4. The top of the slider 5 is connected with a spring telescopic rod 7, and the upper end of the spring telescopic rod 7 is connected with a bearing plate 8. A pre-tightening structure 9 is provided between the bottom of the bearing plate 8 and the slider 5. The two sides of the slider 5 are slidably connected through a hollow limiting rod 10, and both ends of the hollow limiting rod 10 are respectively connected to the two side plates 2. A heat dissipation structure 11 is provided between the side plate 2 and the base 1, and the heat dissipation structure 11 communicates with the hollow limiting rod 10.
[0021] The base 1 is set as a hollow structure, and the base 1 and the side plate 2 form a "concave" structure.
[0022] The adjustable pre-tightening structure 9 includes an opening 901, a pre-tightening block 902, a cylinder 903, and a shape memory alloy spring 904. An opening 901 is formed at the top of the slider 5, and a pre-tightening block 902 is arranged in the opening 901. The upper end of the pre-tightening block 902 is located inside the cylinder 903. The top of the cylinder 903 is connected to the bottom of the bearing plate 8. A number of shape memory alloy springs 904 are connected between the inner end of the pre-tightening block 902 inside the cylinder 903 and the inner bottom of the cylinder 903.
[0023] Both the upper and lower ends of the pre-tightening block 902 are provided with a "T" - shaped structure, and an arc-shaped channel that fits the ball 6 is provided on the lower end face of the pre-tightening block 902.
[0024] The heat dissipation structure 11 includes a water flow channel 1101, a paddle wheel disc 1102, a connecting shaft 1103, a fan assembly 1104, a chain 1105, a guide plate 1106, and heat dissipation fins 1107. A water flow channel 1101 communicating with the base 1 is formed in each side plate 2. A paddle wheel disc 1102 is arranged in the water flow channel 1101 on the side plate 2 where the driving motor 3 is installed. A connecting shaft 1103 is connected to the paddle wheel disc 1102. One end of the connecting shaft 1103 penetrates the inner outer wall of the side plate 2 and is connected to a fan assembly 1104. The other end of the connecting shaft 1103 penetrates the outer outer wall of the side plate 2 and is connected to the output end of the driving motor 3 through a sprocket and a chain 1105. A number of guide plates 1106 are arranged in the base 1, and a number of heat dissipation fins 1107 are installed on the top of the base 1 corresponding to the guide plates 1106.
[0025] The guide plates 1106 are arranged in a zigzag pattern alternately in the base 1. The upper ends of the heat dissipation fins 1107 and the fan assembly 1104 are at the same horizontal plane, and the lower ends of the heat dissipation fins 1107 are located between the guide plates 1106 in the base 1.
[0026] Working principle: According to Figure 1 As shown, the device is installed in the working area and connected to the bearing plate 8. According to the different weights, the degree of contraction of the spring telescopic rod 7 is different. The pre-tightening block 902 is pushed to move closer to the lead screw 4 in the opening 901 to different degrees. The heavier the object, the closer the pre-tightening block 902 is to the lead screw 4, making the gap between the balls smaller. Therefore, the pre-tightening force is greater, reducing the reverse backlash, improving the transmission accuracy, facilitating accurate conveying and movement, and achieving the purpose of adaptive adjustment; With the cooperation of the lead screw 4, the slider 5 and the ball 6 during continuous operation, a large amount of heat generated by friction accumulates on the lead screw 4 and is transferred to the slider 5 through heat transfer, and then the slider 5 transfers it to the hollow limit rod 10. Since the driving motor 3 drives the lead screw 4 to rotate, the connecting shaft 1103 is driven to rotate simultaneously through the sprocket and the chain 1105. The rotation of the connecting shaft 1103 drives the blade disc 1102 and the fan assembly 1104 to rotate simultaneously. The rotation of the blade disc 1102 drives the coolant in the base 1 to pass through the water flow groove 1101 and enter the hollow limit rod 10. After carrying the heat thereon, it flows back into the base 1 and is guided by the guide plate 1106 to pass through the heat dissipation fins 1107, and the heat is transferred to the heat dissipation fins 1107 for heat dissipation. Since the fan assembly 1104 rotates, it acts parallel to the heat dissipation fins 1107 to cool and dissipate heat, effectively reducing the occurrence of thermal expansion of the lead screw 4 and facilitating long-term stable operation; And when operating under high load, the heat accumulation on the lead screw 4 is greater than the cooling effect of the heat dissipation structure 11, and there is a slight temperature accumulation on the lead screw 4, causing it to expand slightly. The heat is transferred to the slider 5 and the pre-tightening block 902, and the pre-tightening block 902 transfers it to the shape memory alloy spring 904, causing it to deform and push the pre-tightening block 902 slightly away from the lead screw 4, increasing the clearance therebetween, thereby reducing the pre-tightening force and achieving adaptive adjustment, effectively reducing the wear and tear caused by thermal expansion. This is the working principle of the adjustable linear guideway slide table.
[0027] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An adjustable linear guide slide, comprising a base (1), characterized in that: The base (1) is connected to a side plate (2) on both sides of the top, and a driving motor (3) is installed outside one of the side plates (2). A lead screw (4) is installed at the output end of the driving motor (3), and the other end of the lead screw (4) is rotatably connected to the other side plate (2). A slider (5) is provided on the outer sleeve of the lead screw (4), and a ball (6) is provided between the slider (5) and the lead screw (4). A spring telescopic rod (7) is connected to the top of the slider (5), and a bearing plate (8) is connected to the upper end of the spring telescopic rod (7). A pre-tightening structure (9) is provided between the bottom of the bearing plate (8) and the slider (5). Hollow limit rods (10) are slidably connected to the two sides of the slider (5), and the two ends of the hollow limit rod (10) are respectively connected to the two side plates (2). A heat dissipation structure (11) is provided between the side plate (2) and the base (1), and the heat dissipation structure (11) is connected to the hollow limit rod (10).
2. The adjustable linear guide slide according to claim 1, characterized in that: The base (1) is configured as a hollow structure, and the base (1) and the side plate (2) form a "concave" structure.
3. The adjustable linear guide slide according to claim 1, characterized in that: The adjustable preload structure (9) comprises an opening (901), a preload block (902), a cylinder (903), and a memory alloy spring (904); the top of the slider (5) is provided with an opening (901), and a preload block (902) is provided in the opening (901); the upper end of the preload block (902) is located in the cylinder (903); the top of the cylinder (903) is connected to the bottom of the bearing plate (8); and the preload block (902) is located between the inner end of the cylinder (903) and the inner bottom of the cylinder (903), and a plurality of memory alloy springs (904) are connected.
4. The adjustable linear guide slide according to claim 3, characterized in that: The upper and lower ends of the pre-tightening block (902) are both arranged as "T"-shaped structures, and the lower end surface of the pre-tightening block (902) is provided with an arc-shaped groove that fits with the ball (6).
5. The adjustable linear guide slide according to claim 1, characterized in that: The heat dissipation structure (11) comprises a water flow groove (1101), a paddle disc (1102), a connecting shaft (1103), a fan assembly (1104), a chain (1105), a guide plate (1106), and a heat dissipation fin (1107). Each of the side panels (2) is provided with a water flow groove (1101) connected to the base (1), and the paddle disc (1102) is provided in the water flow groove (1101) on the side panel (2) on which the drive motor (3) is mounted. A connecting shaft (1103) is connected to the base (2), one end of the connecting shaft (1103) passes through the inner outer wall of the side plate (2) and is connected to a fan assembly (1104), and the other end of the connecting shaft (1103) passes through the outer outer wall of the side plate (2) and is connected to the output end of the drive motor (3) via a sprocket and a chain (1105), a plurality of guide plates (1106) are arranged inside the base (1), and a plurality of heat dissipation fins (1107) are installed on the top of the base (1) corresponding to the guide plates (1106).
6. The adjustable linear guide slide according to claim 5, characterized in that: The guide plates (1106) are arranged alternately in a zigzag shape inside the base (1); the upper ends of the heat dissipation fins (1107) and the fan assembly (1104) are on the same horizontal plane, and the lower ends of the heat dissipation fins (1107) are located between the guide plates (1106) inside the base (1).