High-precision clamping jaw device under low-temperature liquid nitrogen environment
By designing a high-precision jaw device in a low-temperature liquid nitrogen environment, the rolling friction mechanism of the eccentric plate, arcuate waist groove and slide rail components is used to solve the problem of jaw jaw stuck and insufficient accuracy in a low-temperature environment, achieving high-precision, smoothness and long-life clamping effect, while improving the flexibility and maintainability of the equipment.
Patent Information
- Application Number
- CN202421777182.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In the prior art, the jaws are prone to mechanical jaws in low temperature environments, affecting the smooth operation of the equipment; insufficient clamping accuracy, resulting in improper clamping and retrieval of small frozen storage tubes; the performance of equipment components is unstable under extreme temperature conditions and shorten their lifespan; the integrated design of jaws equipment limits the flexibility and maintainability of the equipment.
A high-precision jaw device in a low-temperature liquid nitrogen environment is designed, including core module, drive module and frame module. The core module adopts eccentric plate, curved waist groove and slide rail assembly. Through the rolling friction mechanism of the curved waist groove and slide rail assembly, the jaws can be smoothly clamped and loosened in low temperature environments.
It realizes high accuracy and smoothness of clamping small frozen storage tubes in low-temperature liquid nitrogen environments, reduces friction between components, reduces wear, extends the service life of the device, and improves the flexibility and maintainability of the equipment.
Smart Images
Figure CN222807089U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of biological sample storage, in particular to a high-precision clamping claw device in a low-temperature liquid nitrogen environment. Background Art
[0002] In the existing technology, the jaws often cause mechanical jamming in low-temperature environments, affecting the smooth operation of the equipment; secondly, due to the insufficient clamping accuracy of some jaws, the accurate clamping of small cryotubes is improperly performed; in addition, the components in the equipment operate under low or abnormal temperature conditions, which can easily lead to unstable performance or shortened lifespan; moreover, common gripper devices are mostly integrated and the various parts are not easy to disassemble. This integrated design limits the flexibility and maintainability of the equipment, making it difficult to upgrade the equipment and complicated maintenance due to the inability to replace parts during maintenance. Utility Model Content
[0003] The purpose of the utility model is to provide a high-precision clamping claw device in a low-temperature liquid nitrogen environment, which can smoothly and accurately clamp small cryopreservation tubes in a low-temperature environment and make it easy to repair or upgrade the components of the equipment.
[0004] In order to solve the above technical problems, the utility model provides a high-precision clamping device in a low-temperature liquid nitrogen environment, comprising a core module;
[0005] The core module includes an eccentric plate, a slide rail assembly and at least two claw fingers;
[0006] The eccentric plate is provided with at least two arc-shaped waist grooves, and the arc-shaped waist grooves are arranged in a divergent shape from the center of the eccentric plate outwards;
[0007] The slide rail assembly comprises a slide rail, a slide rail fixing bracket, a slider, a transmission plate and a transmission rod; the slide rail is mounted on the slide rail fixing bracket, the slider is mounted on the slide rail, one end of the transmission rod is mounted on the slider, and the other end is arranged in the arc-shaped waist groove of the eccentric plate, and one end of the claw finger is connected to the slider through the transmission plate;
[0008] When the eccentric plate rotates, the slide rail assembly drives the claw fingers to clamp or release.
[0009] Furthermore, the eccentric plate is provided with four arc-shaped waist grooves, and the slider, the transmission plate, the transmission rod and the claw fingers of the slide rail assembly are all arranged in one-to-one correspondence with the arc-shaped waist grooves.
[0010] Furthermore, the slide rail fixing bracket includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are both horizontally arranged and fixed to each other to form a "cross" structure, and the first connecting plate and the second connecting plate both have a slide rail mounting surface; connecting blocks are arranged at the opposite ends of the first connecting plate and the opposite ends of the second connecting plate, and the top ends of the connecting blocks are at the same horizontal height.
[0011] Furthermore, the slide rails are linear guide rails and there are two of them, one of which is fixed on the slide rail mounting surface of the first connecting plate, and the other of which is fixed on the slide rail mounting surface of the second connecting plate. The two slide rails are perpendicular to each other in a "cross" shape, and two sliders are provided on each of the slide rails.
[0012] Furthermore, the slide rails are linear guide rails and there are four of them, the four slide rails are all installed on the slide rail mounting surface, two non-adjacent slide rails are installed on the same slide rail mounting surface, any two adjacent slide rails are perpendicular to each other, and each slide rail is provided with a slider.
[0013] Furthermore, a slot is provided on the transmission plate, and the transmission plate is connected to the slider via the slot.
[0014] Furthermore, it also includes a driving module; the driving module includes a motor, a motor seat, a rotating rod and a bearing; the motor is installed on the motor seat; one end of the rotating rod passes through the motor seat and is sleeved on the motor shaft of the motor; the bearings are installed at both ends of the rotating rod.
[0015] Furthermore, the eccentric plate is also provided with a columnar connecting end, and the columnar connecting end is used to connect the other end of the rotating rod.
[0016] Furthermore, it also includes a frame module; the frame module includes a main body and a fixed plate; the main body is a hollow tubular structure, the rotating rod is rotatably installed in the main body through the bearing, one end of the main body is connected to the motor seat, the other end of the main body is connected to one side of the fixed plate, and the other side of the fixed plate is connected to the slide rail fixing bracket.
[0017] Furthermore, the roughness Ra of the arc-shaped waist groove is 0.2-0.8 μm.
[0018] Compared with the prior art, the utility model has at least the following beneficial effects:
[0019] The high-precision low-temperature liquid nitrogen clamping device proposed by the utility model can realize the clamping and loosening of the clamping jaw in a low-temperature liquid nitrogen environment by using the arc-shaped waist groove and the slide rail assembly arranged on the eccentric plate. Rolling friction is adopted between each part of the slide rail assembly and between the contact surface of the slide rail assembly and the arc-shaped waist groove, which can enhance the fluency of the clamping jaw during the clamping and loosening process, ensure the accuracy of the operation, and also reduce the friction between the components, thereby reducing wear and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic structural diagram of a high-precision clamping jaw device in one embodiment of the utility model;
[0021] Figure 2 It is an AA cross-sectional view of a high-precision clamping jaw device in one embodiment of the utility model;
[0022] Figure 3 This is an enlarged view of the core components of the high-precision clamping jaw device in one embodiment of the utility model;
[0023] Figure 4 This is an enlarged view of the core component of the high-precision clamping jaw device in one embodiment of the utility model without showing the eccentric plate;
[0024] Figure 5 This is a schematic diagram of the slide rail fixing bracket structure of a high-precision clamping jaw device in one embodiment of the utility model.
[0025] Figure numbers: 1. Motor; 2. Motor seat; 3. Rotating rod; 4. Bearing; 5. Main body; 6. Fixed plate; 7. Eccentric plate; 8. Transmission rod; 9. Slider; 10. Slide rail; 11. Transmission plate; 12. Slide rail fixing bracket; 13. Claw; 14. Arc waist groove; 15. Columnar connecting end; 16. Connecting block; 12a. Slide rail mounting surface. DETAILED DESCRIPTION
[0026] The high-precision clamping device of the utility model will be described in more detail below in conjunction with the schematic diagram, wherein the preferred embodiment of the utility model is shown. It should be understood that the utility model described herein can be modified by those skilled in the art, while still achieving the advantageous effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation to the utility model.
[0027] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.
[0028] like Figures 1 to 5As shown, an embodiment of the utility model provides a high-precision clamping device in a low-temperature liquid nitrogen environment, including a core module, a driving module and a frame module.
[0029] Specifically, Figure 3-Figure 5 As shown, the core module includes an eccentric plate 7, a slide rail assembly and at least two claw fingers 13. The eccentric plate 7 is provided with at least two arcuate waist grooves 14, which are arranged in a divergent shape from the center of the eccentric plate 7 to the outside, and the distance between the center of the circle of the arcuate waist groove 14 measuring point and the center of the eccentric plate 7 changes from small to large, which is used to limit the stroke of the slide rail assembly; the arcuate waist groove 14 is hardened, and the roughness Ra of the arcuate waist groove 14 is set to 0.2-0.8μm, which is convenient for reducing the friction between the arcuate waist groove 14 and the slide rail assembly, so that the slide rail assembly slides smoothly.
[0030] Specifically, the claw fingers 13 may be two, three, four or more. The number of the arcuate waist grooves 14 is set according to the number of the claw fingers 13 , and the groove length and divergence angle of the arcuate waist grooves 14 are set according to the range of movement of the claw fingers 13 .
[0031] In a specific embodiment, the eccentric plate 7 is provided with four arc-shaped waist grooves 14, and the slider 9, the transmission plate 11, the transmission rod 8 and the claw fingers 13 of the slide rail assembly are all arranged in one-to-one correspondence with the arc-shaped waist grooves 14, and the four claw fingers 13 are combined into a clamp. In addition, the eccentric plate 7 is arranged horizontally, and the eccentric plate 7 is also provided with a columnar connecting end 15, and the columnar connecting end 15 is used to connect the rotating rod 3; the columnar connecting end 15 can be assembled and fixed with the eccentric plate 7, or can be integrally formed.
[0032] In this embodiment, the slide rail assembly includes a transmission rod 8, a slider 9, a slide rail 10, a transmission plate 11 and a slide rail fixing bracket 12. The slide rail assembly adopts a rolling friction mechanism between the components, thereby reducing the friction of the contact surface between the components and making the movement smoother.
[0033] The transmission rod 8 is vertically arranged, one end of which is mounted on the slider 9, and the other end is arranged in the arc waist groove 14 of the eccentric plate 7. In this embodiment, four transmission rods 8 are arranged, of which two are long and two are short. The transmission rod 8 is fixed to the top of the slider 9, and the lengths of two adjacent transmission rods 8 are inconsistent. Preferably, the tops of the four transmission rods 8 are also at the same horizontal height. The transmission rod 8 is made of hardened steel, and the surface roughness Ra is 0.2-0.8μm, so that the transmission rod 8 has improved hardness and strength while maintaining a certain smoothness.
[0034] The transmission plate 11 is provided with a slot, and the transmission plate 11 is connected to the slider 9 through the slot. The slide rail 10 is mounted on the slide rail fixing bracket 12, and the slider 9 is mounted on the slide rail 10 and can slide along the slide rail 10.
[0035] like Figure 5 As shown, the slide rail fixing bracket 12 includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are both horizontally arranged and fixed to each other to form a "cross" structure, which can effectively disperse the load and improve the stability and bearing capacity of the entire device. The first connecting plate and the second connecting plate each have a slide rail mounting surface 12a, which is a vertical side surface extending along the length direction; the opposite ends of the first connecting plate and the opposite ends of the second connecting plate are both provided with connecting blocks 16, and the top ends of the connecting blocks 16 are located at the same horizontal height.
[0036] In this embodiment, the slide rails 10 are linear guide rails and there are two of them. One of the slide rails 10 is fixed on the slide rail mounting surface of the first connecting plate, and the other slide rail is fixed on the slide rail mounting surface of the second connecting plate. The two slide rails 10 are perpendicular to each other in a "cross" shape, and each of the slide rails 10 is provided with two sliders 9.
[0037] In another embodiment, the slide rails 10 are linear guide rails and there are four of them. The four slide rails 10 are all installed on the slide rail mounting surface. Two non-adjacent slide rails 10 are installed on the same slide rail mounting surface. Any two adjacent slide rails 10 are perpendicular to each other, and each slide rail 10 is provided with a slider 9.
[0038] One end of the claw finger 13 is connected to the slider 9 through the transmission plate 11. In a specific embodiment, the claw finger 13 is provided in four numbers, and is provided with one end being thicker and the other end being thinner. The slider 9 is connected to the thicker end of the claw finger 13 through the transmission plate 11. When the eccentric plate 7 rotates, the slide rail assembly drives the claw finger 13 to clamp or loosen. The claw finger 13 is made of metal material, and the four claw fingers 13 are used in combination, so that the claw finger 13 can be clamped in a small gap while maintaining the strength.
[0039] In this embodiment, the driving module of the clamping device includes a motor 1, a motor seat 2, a rotating rod 3 and a bearing 4. Figure 1-Figure 2As shown. The motor 1 is mounted on the motor base 2, and the motor base 2 is used to fix the motor 1 and ensure the coaxiality of the motor shaft of the motor 1 and the rotating rod 3, so as to ensure the accuracy and efficiency of power transmission; one end of the rotating rod 3 passes through the motor base 2 and is sleeved on the motor shaft of the motor 1, and the motor 1 drives the rotating rod 3 to rotate; the bearings 4 are mounted on both ends of the rotating rod 3, which can reduce the friction and wear of the rotating rod 3 during the rotation process, improve the stability of the rotation, and the bearings 4 can also absorb and reduce the vibration and impact caused by the operation of the motor 1, so as to protect the motor 1 and the entire device.
[0040] In this embodiment, the frame module of the clamping device includes a main body 5; the main body 5 is a hollow tubular structure, the rotating rod 3 is rotatably installed in the main body 5 through the bearing 4, and the upper end of the main body 5 is connected to the motor base 2. The main body 5 is used to protect the rotating rod 3 inside and provide a stable support for the motor base 2.
[0041] Furthermore, the frame module also includes a fixing plate 6; Figure 2 As shown, the upper end surface of the fixing plate 6 is connected to the other end of the main body 5, and the lower end surface is connected to the slide rail fixing bracket 12. The fixing plate 6 connects the driving module and the slide rail assembly to form a stable structure; and the fixing plate 6 provides an additional support point for the frame module to enhance the stability of the entire device.
[0042] When the motor 1 starts to work, the rotating rod 3 starts to rotate driven by the motor shaft, thereby driving the eccentric plate 7 to rotate, so that the transmission rod 8 moves in the arc-shaped waist groove 14 of the eccentric plate 7, and then drives the slider 9 connected thereto to make a linear motion on the slide rail 10. The claw finger 13 makes a reciprocating motion driven by the motor 1, so that the clamping claw can clamp or release.
[0043] In summary, the electric components of the clamping device are located above the entire device, making the circuit shorter to reduce the risk of electrical failure and also avoiding damage to the electrical components in a low-temperature liquid nitrogen environment; the clamping finger 13 is made of metal material, which has little deformation in a low-temperature liquid nitrogen environment and can maintain good performance; by providing the arc-shaped waist groove 14 on the eccentric plate 7, the arc-shaped waist groove 14 can be used to achieve the clamping and loosening of the clamp in a low-temperature liquid nitrogen environment; in addition, the slide rail assembly is further provided, and rolling friction is used between each part of the slide rail assembly and between the contact surfaces of the slide rail assembly and the arc-shaped waist groove 14, which can enhance the smoothness of the clamp during the opening and closing process, ensure the accuracy of the operation, and also reduce the friction between the components, thereby reducing wear and extending the service life of the device. In addition, the core module can be quickly replaced to save maintenance time.
[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A high-precision clamping device in a low-temperature liquid nitrogen environment, characterized in that: Including core modules; The core module includes an eccentric plate, a slide rail assembly and at least two claw fingers; The eccentric plate is provided with at least two arc-shaped waist grooves, and the arc-shaped waist grooves are arranged in a divergent shape from the center of the eccentric plate to the outside; The slide rail assembly comprises a slide rail, a slide rail fixing bracket, a slider, a transmission plate and a transmission rod; the slide rail is mounted on the slide rail fixing bracket, the slider is mounted on the slide rail, one end of the transmission rod is mounted on the slider, and the other end is arranged in the arc-shaped waist groove of the eccentric plate, and one end of the claw finger is connected to the slider through the transmission plate; When the eccentric plate rotates, the slide rail assembly drives the claw fingers to clamp or release.
2. The high-precision clamping device according to claim 1, characterized in that: The eccentric plate is provided with four arc-shaped waist grooves, and the slider, the transmission plate, the transmission rod and the claw fingers of the slide rail assembly are all arranged in one-to-one correspondence with the arc-shaped waist grooves.
3. The high-precision clamping device according to claim 1, characterized in that: The slide rail fixing bracket includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are both horizontally arranged and fixed to each other to form a "cross" structure, and the first connecting plate and the second connecting plate both have a slide rail mounting surface; connecting blocks are arranged at the opposite ends of the first connecting plate and the opposite ends of the second connecting plate, and the top ends of the connecting blocks are located at the same horizontal height.
4. The high-precision clamping device according to claim 3, characterized in that: The slide rails are linear guide rails and there are two of them. One of the slide rails is fixed on the slide rail mounting surface of the first connecting plate, and the other of the slide rails is fixed on the slide rail mounting surface of the second connecting plate. The two slide rails are perpendicular to each other in a "cross" shape, and two sliders are arranged on each of the slide rails.
5. The high-precision clamping device according to claim 3, characterized in that: The slide rails are linear guide rails and there are four of them. The four slide rails are all installed on the slide rail mounting surface. Two non-adjacent slide rails are installed on the same slide rail mounting surface. Any two adjacent slide rails are perpendicular to each other, and each slide rail is provided with a slider.
6. The high-precision clamping device according to claim 1, characterized in that: The transmission plate is provided with a slot, and the transmission plate is connected to the slider via the slot.
7. The high-precision clamping device according to claim 1, characterized in that: It also includes a driving module; the driving module includes a motor, a motor seat, a rotating rod and a bearing; the motor is installed on the motor seat; one end of the rotating rod passes through the motor seat and is sleeved on the motor shaft of the motor; the bearings are installed at both ends of the rotating rod.
8. The high-precision clamping device according to claim 7, characterized in that: The eccentric plate is also provided with a columnar connecting end, and the columnar connecting end is used to connect the other end of the rotating rod.
9. The high-precision clamping device according to claim 7, characterized in that: It also includes a frame module; the frame module includes a main body and a fixed plate; the main body is a hollow tubular structure, the rotating rod is rotatably installed in the main body through the bearing, one end of the main body is connected to the motor seat, the other end of the main body is connected to one side of the fixed plate, and the other side of the fixed plate is connected to the slide rail fixing bracket.
10. The high-precision clamping device according to claim 1, characterized in that: The roughness Ra of the arc-shaped waist groove is 0.2-0.8 μm .