Heating rod application of thermal grease device

Abstract

This application relates to a device for applying thermal grease to a heating rod. The device includes a housing, a drive roller, and a driven roller. Both the drive roller and the driven roller are partially immersed in thermal grease, so that their surfaces are coated with thermal grease during rotation. The contact force between the drive roller and the heating rod, and between the driven roller and the heating rod, is a component of the heating rod's weight. This allows the thermal grease on the drive roller to be applied to the surface of the heating rod through rotation, and similarly, the thermal grease on the driven roller can be applied to the surface of the heating rod through rotation, ensuring that the surface of the heating rod is uniformly coated with thermal grease.

Description

Technical Field

[0001] This application relates to the field of coating apparatus technology, and in particular to an apparatus for applying thermally conductive silicone grease to a heating rod. Background Technology

[0002] The heater is one of the important components in medical equipment (such as fully automated biochemical analyzers), and the temperature of the heater is a key indicator that determines whether the biochemical reaction process is qualified. Therefore, it is usually necessary to evenly apply thermal grease to the heating rod before placing it into the heater cavity to ensure uniform heat conduction and accurate temperature control.

[0003] In existing technologies, thermal grease is mostly applied to the surface of the heating rod using a scraper or spraying methods. The scraper application process relies on manual operation, resulting in poor coating thickness consistency (error > 1 mm) and low grease utilization (< 60%), leading to low work efficiency. The spraying process requires complex atomization equipment and is prone to grease splattering and contamination. Utility Model Content

[0004] Therefore, it is necessary to provide a heating rod for applying thermally conductive silicone grease, which addresses the problems of poor coating thickness consistency (error > 1 mm), low silicone grease utilization (< 60%), low work efficiency, and easy silicone grease splatter contamination caused by existing walking or spraying methods.

[0005] A device for applying thermal grease to a heating rod, used to apply thermal grease to the surface of the heating rod, the device comprising:

[0006] The housing has an opening and contains the thermal grease;

[0007] Active idler rollers;

[0008] The driven roller and the active roller are both rotatably engaged with the housing around the axis of the first direction and partially immersed in the thermal grease. The driven roller can be adjusted relative to the housing in the second direction to adjust the distance between the active roller and the driven roller.

[0009] The heating rod is placed on the upper side between the active roller and the driven roller so that the active roller and the driven roller support the heating rod; when the active roller rotates, it drives the heating rod to rotate through friction transmission, and when the heating rod rotates, it drives the driven roller to rotate through friction transmission; the third direction is the orientation of the opening, and the first direction, the second direction and the third direction are perpendicular to each other.

[0010] In one embodiment, the heating rod thermal grease application device includes a drive shaft and a power unit;

[0011] The active rollers are located at least partially inside the box body on both sides along the first direction. The active shaft passes through the active rollers and the side walls of the box body on both sides along the first direction. The active shaft passes through the active rollers and is coaxially connected. The power unit is used to drive the active shaft to rotate and cooperate with the box body along the axis of the first direction.

[0012] In one embodiment, the heating rod thermal grease application device further includes two bearings;

[0013] The housing has main shaft through holes on both sides of the first direction. Two bearings are located in the corresponding main shaft through holes. The outer ring of the bearing is connected to the inner wall of the main shaft through hole. The two ends of the drive shaft pass through the two bearings and are connected to the inner ring of the bearing.

[0014] In one embodiment, the heating rod thermal grease applicator further includes two sets of first fasteners, each fastener comprising a first rod and a first head connected together, the first rod passing through the side wall of the housing, and the first head abutting against the opposite side of the bearing.

[0015] In one embodiment, the heating rod thermal grease applicator includes a driven shaft, and the box body has strip-shaped holes on its side walls along the first direction. The strip-shaped holes extend along the second direction. The driven roller is rotatably sleeved on the driven shaft. The two ends of the driven shaft are located in the strip-shaped holes along the first direction. The driven shaft and the box body slide in cooperation along the second direction.

[0016] In one embodiment, the heating rod thermal grease application device further includes two second fasteners, which are respectively connected to both ends of the driven shaft and are capable of abutting or disengaging from the housing.

[0017] In one embodiment, the second fastener includes a second rod portion and a second head portion connected together. The driven shaft has adjustment holes at both ends along the first direction. The second rod portion is threadedly connected to the corresponding adjustment hole. The second head portion can abut against or release from the housing.

[0018] In one embodiment, the heating rod applying thermal grease device further includes a heating section connected to the outer wall of the housing for heating the housing.

[0019] In one embodiment, the heating element is a heating film, which is attached to the bottom wall of the box.

[0020] In one embodiment, the heating rod thermal grease application device further includes an elastic coating layer that covers the sidewall of the active roller and rotates in conjunction with the heating rod.

[0021] In the process of applying thermal grease to the surface of the heating rod, the aforementioned heating rod application device first moves the driven roller relative to the housing in the second direction according to the diameter of the heating rod to be applied, and adjusts the distance between the active roller and the driven roller. Then, the heating rod is placed on the active roller and the driven roller, and then the active roller is rotated. The heating rod will rotate with the active roller, and the driven roller will rotate with the heating rod. Both the active roller and the driven roller are partially immersed in thermal grease, so that the surface is covered with thermal grease during the rotation. The contact force between the active roller and the heating rod, and between the driven roller and the heating rod, is the component of the heating rod's weight. This allows the thermal grease on the active roller to be applied to the surface of the heating rod through rotation, and similarly, the thermal grease on the driven roller can be applied to the surface of the heating rod through rotation, ensuring that the surface of the heating rod is evenly coated with thermal grease. After the thermal grease application is completed, the heating rod can be removed. Meanwhile, since the distance between the active roller and the driven roller is adjustable, the gravity distribution of the heating rod can be changed, thereby changing the contact force between the heating rod and the driven roller and the active roller, and ultimately changing the thickness of the thermal grease applied to the surface of the heating rod. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a heating rod applying thermal grease device according to one embodiment.

[0023] Figure 2 for Figure 1 A diagram from another perspective.

[0024] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0025] Explanation of icon numbers:

[0026] 10 - Device for applying thermal grease to heating rods;

[0027] 100 - Box body; 101 - Opening; 102 - Main spindle through hole; 103 - Strip hole;

[0028] 200 - Active idler roller; 210 - Bearing;

[0029] 300 - Driven idler roller;

[0030] 400 - Driven shaft; 410 - Driven shaft; 411 - Adjustment hole;

[0031] 500 - Power Unit;

[0032] 600 - First fastener; 610 - First head;

[0033] 700 - Second fastener; 710 - Second head;

[0034] 800 - Heating section;

[0035] 20 - Heating rod; 21 - Thermal grease;

[0036] OX - First direction; OY - Second direction; OZ - Third direction. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] See Figure 1 , Figure 1 A schematic diagram of the structure of a heating rod thermal grease application device 10 in one embodiment of this application is shown. The heating rod thermal grease application device 10 provided in one embodiment of this application is used to apply thermal grease 21 to the surface of the heating rod 20. The heating rod thermal grease application device 10 includes: a housing 100, an active roller 200 and a driven roller 300.

[0044] See Figure 1 In the aforementioned heating rod thermal grease application device 10, the housing 100 has an opening 101 and contains thermal grease 21. The driving roller 200 is rotatably engaged with the housing 100 about an axis in the first direction OX. The driven roller 300 is rotatably engaged with the housing 100 about an axis in the first direction OX and is partially immersed in the thermal grease 21. (See reference...) Figure 3The driven roller 300 can be adjusted relative to the box body 100 along the second direction OY to adjust the distance between the driving roller 200 and the driven roller 300. The heating rod 20 is placed on the upper side between the driving roller 200 and the driven roller 300 so that the driving roller 200 and the driven roller 300 support the heating rod 20. The driving roller 200 drives the heating rod 20 to rotate through friction transmission, and the heating rod 20 drives the driven roller 300 to rotate through friction transmission. The third direction OZ is the orientation of the opening 101, and the first direction OX, the second direction OY, and the third direction OZ are perpendicular to each other.

[0045] In the process of applying thermal grease 21 to the surface of the heating rod 20, the aforementioned heating rod applying thermal grease 10 first moves the driven roller 300 relative to the housing 100 along the second direction OY according to the diameter of the heating rod 20 to be applied, adjusting the distance between the driving roller 200 and the driven roller 300. Then, the heating rod 20 is placed on the driving roller 200 and the driven roller 300. The driving roller 200 is then rotated, causing the heating rod 20 to rotate with it, and the driven roller 300 to rotate with it as well. Both the driving roller 200 and the driven roller 300 are... The heating rod 20 is immersed in thermal grease 21, so that the surface is coated with thermal grease 21 during rotation. The contact force between the active roller 200 and the heating rod 20, and between the driven roller 300 and the heating rod 20, is a component of the weight of the heating rod 20. This allows the thermal grease 21 on the active roller 200 to be spread to the surface of the heating rod 20 by rotation, and similarly, the thermal grease 21 on the driven roller 300 can be spread to the surface of the heating rod 20 by rotation, ensuring that the surface of the heating rod 20 is evenly coated with thermal grease 21. After the thermal grease 21 is applied to the heating rod 20, the heating rod 20 can be removed. At the same time, since the distance between the active roller 200 and the driven roller 300 is adjustable, the weight distribution of the heating rod 20 can be changed, thereby changing the contact force between the heating rod 20 and the driven roller 300 and the active roller 200, and ultimately changing the thickness of the thermal grease 21 applied to the surface of the heating rod 20.

[0046] See Figure 1 In one embodiment, the heating rod thermal grease application device 10 includes a drive shaft 400 and a power unit 500. Drive rollers 200 on both sides of the housing 100 along the first direction OX are at least partially located inside the housing 100. The drive shaft 400 passes through the drive rollers 200 and the side walls of the housing 100 along the first direction OX, and is coaxially connected to the drive rollers 200. The power unit 500 drives the drive shaft 400 to rotate in conjunction with the housing 100 along the axis of the first direction OX.

[0047] In this embodiment, the power unit 500 drives the drive shaft 400 to rotate relative to the housing 100 along the axis of the first direction OX, thereby driving the drive roller 200 to rotate relative to the housing 100 along the axis of the first direction OX. Compared with manually cranking the handle, the power unit 500 can drive the drive roller 200 to rotate at a stable speed, thereby ensuring that the thermal grease 21 on the surface of the heating rod 20 is applied more evenly and the process is more stable, and there will be no situation where the thermal grease 21 splashes out.

[0048] Specifically, the power unit 500 can be a drive motor or cylinder, etc. The power unit 500 can be directly connected to the shaft of the drive roller 200, or it can be connected to the drive roller 200 through gears, timing belts, chains, etc.

[0049] See Figure 3 In one embodiment, the heating rod thermal grease application device 10 further includes two bearings 210. The housing 100 has main shaft through holes 102 on its sidewalls along the first direction OX. The two bearings 210 are located within their respective main shaft through holes 102. The outer ring of each bearing 210 is connected to the inner wall of the main shaft through hole 102. Both ends of the drive shaft 400 pass through the two bearings 210 and are connected to the inner rings of the bearings 210. In this embodiment, by providing the bearings 210, the drive shaft 400 is rotatably connected to the housing 100 via the bearings 210. Furthermore, the bearings 210 make the rotation between the drive shaft 400 and the housing 100 more stable, reducing errors in rotational speed and power caused by friction.

[0050] See Figure 1 and Figure 3 In one embodiment, the heating rod thermal grease application device 10 further includes two sets of first fasteners 600. Each first fastener 600 includes a first rod portion and a first head 610 connected to each other. The first rod portion (not shown) passes through the side wall of the housing 100, and the first head 610 abuts against the opposite sides of the two bearings 210. By tightening the first fasteners 600, the first head 610 of the first fastener 600 abuts against the opposite sides of the bearings 210 along the first direction OX, thereby confining the bearings 210 in the space between the first head 610, the drive shaft 400, and the inner wall of the spindle through hole 102, preventing the bearings 210 from coming out of the spindle through hole 102 and causing the drive shaft 400 to be unable to rotate.

[0051] See Figure 1 and Figure 3In one embodiment, the heating rod thermal grease application device 10 includes a driven shaft 410. The housing 100 has strip-shaped holes 103 on its sidewalls along the first direction OX, extending along the second direction OY. A driven roller 300 is rotatably fitted onto the driven shaft 410. Both ends of the driven shaft 410 are located within the strip-shaped holes 103 along the first direction OX. The driven shaft 410 and the housing 100 slide in the second direction OY. Thus, by sliding the two ends of the driven shaft 410 within the strip-shaped holes 103 along the second direction OY, the driven roller 300 can slide within the strip-shaped holes 103 along the second direction OY, thereby changing the distance between the driven roller 300 and the driving roller 200 to accommodate heating rods 20 of different diameters.

[0052] See Figure 1 and Figure 3 In one embodiment, the heating rod thermal grease applicator 10 further includes two second fasteners 700, which are respectively connected to both ends of the driven shaft 410 and are capable of contacting or releasing the housing 100.

[0053] See Figure 1 and Figure 3 In one embodiment, the second fastener 700 includes a second rod portion (not shown) and a second head 710 connected together. Adjustment holes 411 are respectively provided at both ends of the driven shaft 410 along the first direction OX. The second rod portion is threadedly connected to the corresponding adjustment hole 411, and the second head 710 can abut or disabut against the housing 100. When it is necessary to move the driven roller 300, the second rod portion is loosened, and the second head 710 disabuts from the housing 100. Then, the driven roller 300 is moved to the desired position at a predetermined interval. The second rod portion is tightened, and the second head 710 abuts against the housing 100, thereby fixing the distance between the driven roller 300 and the driving roller 200, and allowing the driven roller 300 to rotate around the driven shaft 410.

[0054] In another embodiment, the second fastener 700 can also be an elastic member connected to the second head 710. One end of the elastic member is connected to the second head 710, and the other end passes through and is connected to the driven shaft 410. The second head 710 can abut against or release from the box body 100. Overcoming the elastic contraction force of the elastic member causes the second head 710 to release from the box body 100. Then, the driven roller 300 is moved to a predetermined position, the elastic member is released, and the elastic member contracts, causing the second head 710 to abut against the box body 100, thereby limiting the driven roller 300.

[0055] In other embodiments, the second fastener 700 may also be in other forms, such as spring abutment or friction abutment, so that the driven roller 300 can move relative to the box 100 in the second direction OY and be fixed relative to the box 100. The specific form is not limited here.

[0056] See Figure 2 In one embodiment, the heating rod thermal grease applicator 10 further includes a heating part 800, which is connected to the outer wall of the housing 100 and is used to heat the housing 100.

[0057] In one embodiment, the heating element 800 is a heating film attached to the bottom wall of the housing 100. In other embodiments, heating can also be achieved through a water bath or other methods. The specific method of heating the housing 100 is not limited here. The main purpose is to heat and control the temperature of the thermal grease 21 inside the housing 100 to 30±2℃ by heating the housing 100, thereby reducing the viscosity of the thermal grease 21 (from 8000cps to 3000cps), and thus better applying the thermal grease 21 to the surface of the heating rod 20.

[0058] Specifically, the drive shaft 400 is coaxially arranged with the drive roller 200, and the driven shaft 410 is coaxially arranged with the driven roller 300.

[0059] In one embodiment, the heating rod thermal grease application device 10 further includes an elastic coating layer (not shown), which covers the sidewall of the drive roller 200 and rotates in conjunction with the heating rod 20. The elastic coating layer is made of materials such as fluororubber with a Shore hardness of 60±5, ensuring sufficient friction between the drive roller 200 and the heating rod 20 without damaging the heating rod 20, thus ensuring that the rotation of the drive roller 200 drives the rotation of the heating rod 20.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heating rod thermal grease application device for applying thermal grease to the surface of a heating rod, characterized in that, The device for applying thermal grease to the heating rod includes: The housing has an opening and contains the thermal grease; Active idler rollers; Both the driven roller and the active roller are rotatably engaged with the housing around the axis of the first direction and partially immersed in the thermal grease. The driven roller can be adjusted relative to the housing in the second direction to adjust the distance between the active roller and the driven roller. The heating rod is placed on the upper side between the active roller and the driven roller so that the active roller and the driven roller support the heating rod; when the active roller rotates, it drives the heating rod to rotate through friction transmission, and when the heating rod rotates, it drives the driven roller to rotate through friction transmission; the third direction is the orientation of the opening, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The heating rod thermal grease spreading device according to claim 1, wherein The heating rod thermal grease application device includes a drive shaft and a power unit; The active rollers are located at least partially inside the box body on both sides along the first direction. The active shaft passes through the active rollers and the side walls of the box body on both sides along the first direction. The active shaft passes through the active rollers and is coaxially connected. The power unit is used to drive the active shaft to rotate and cooperate with the box body along the axis of the first direction.

3. The device for applying thermally conductive silicone grease to a heating rod according to claim 2, characterized in that, The heating rod thermal grease application device also includes two bearings; The housing has main shaft through holes on both sides of the first direction. Two bearings are located in the corresponding main shaft through holes. The outer ring of the bearing is connected to the inner wall of the main shaft through hole. The two ends of the drive shaft pass through the two bearings and are connected to the inner ring of the bearing.

4. The device for applying thermally conductive silicone grease to a heating rod according to claim 3, characterized in that, The heating rod thermal grease application device also includes two sets of first fasteners. Each first fastener includes a first rod and a first head connected to each other. The first rod passes through the side wall of the housing, and the first head abuts against the side portion of the bearing that is opposite to it.

5. The device for applying thermally conductive silicone grease to a heating rod according to claim 1, characterized in that, The heating rod thermal grease application device includes a driven shaft. The box body has strip-shaped holes on both sides of the sidewalls along the first direction. The strip-shaped holes extend along the second direction. The driven roller is rotatably sleeved on the driven shaft. The two ends of the driven shaft are located in the strip-shaped holes on both sides along the first direction. The driven shaft and the box body slide in cooperation along the second direction.

6. The device for applying thermally conductive silicone grease to a heating rod according to claim 5, characterized in that, The heating rod thermal grease application device also includes two second fasteners, which are respectively connected to both ends of the driven shaft and can abut or release from the housing.

7. The device for applying thermally conductive silicone grease to a heating rod according to claim 6, characterized in that, The second fastener includes a second rod portion and a second head portion connected together. The driven shaft has adjustment holes at both ends along the first direction. The second rod portion is threadedly connected to the corresponding adjustment hole. The second head portion can abut against or release from the housing.

8. The device for applying thermally conductive silicone grease to a heating rod according to claim 1, characterized in that, The heating rod thermal grease application device also includes a heating section, which is connected to the outer wall of the box and is used to heat the box.

9. The device for applying thermally conductive silicone grease to a heating rod according to claim 8, characterized in that, The heating element is a heating film, which is attached to the bottom wall of the box.

10. The device for applying thermally conductive silicone grease to a heating rod according to claim 1, characterized in that, The heating rod thermal grease application device also includes an elastic coating layer, which covers the side wall of the active roller and rotates in cooperation with the heating rod.

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