Power transmission mechanism and high-temperature furnace

Abstract

The utility model relates to a power transmission mechanism and a high-temperature furnace. The power transmission mechanism comprises a power element, an intermittent transmission assembly and a transmission shaft, the intermittent transmission assembly comprises a first transmission part and a second transmission part, the first transmission part and the second transmission part have a driving connection state and a separation state, and the first transmission part is in driving connection with the power element; the first transmission part and the second transmission part are switched between a driving connection state and a separation state through the power element. The transmission shaft is in driving connection with the second transmission part. According to the power transmission mechanism and the high-temperature furnace, when no power transmission requirement exists, the first transmission part and the second transmission part are switched to the separated state, a heat transfer path is cut off, heat conduction is isolated, the transmission shaft is prevented from transferring heat to the power element, high-temperature damage is avoided, and the power element is protected. And the service life of the power element is prolonged.

Description

Technical Field

[0001] The present application relates to the field of power transmission technology, and in particular to a power transmission mechanism and a high-temperature furnace. Background Art

[0002] In some manufacturing industries, samples need to rotate, lift and other movements in a specific environment of a high-temperature furnace, so a transmission shaft needs to be extended from the outside into the high-temperature furnace for mechanical transmission. One end of the transmission shaft bears the high temperature in the high-temperature furnace, and the other end is equivalent to a heating rod outside the furnace body, which continuously conducts heat out. The power transmission components are easily damaged by high temperature, which affects the service life of the power transmission components. Summary of the invention

[0003] Based on this, it is necessary to provide a power transmission mechanism and a high temperature furnace to address the problem that the transmission shaft will continuously conduct heat to the power transmission components.

[0004] The embodiment of the first aspect of the present application provides a power transmission mechanism, comprising:

[0005] Power components;

[0006] An intermittent transmission assembly, the intermittent transmission assembly comprising a first transmission member and a second transmission member, the first transmission member and the second transmission member having a driving connection state and a separation state, the first transmission member being drivingly connected to the power element, the first transmission member switching between the driving connection state and the separation state through the power element and the second transmission member;

[0007] A transmission shaft is drivingly connected to the second transmission member.

[0008] In one embodiment, the first transmission member comprises an incomplete driving gear, and a driving tooth transmission part is arranged on the circumference of the incomplete driving gear;

[0009] The second transmission member comprises a driven gear, and a driven gear transmission part is arranged on the circumference of the driven gear;

[0010] Among them, when the active gear transmission part is meshed with the driven gear transmission part, it is the driving connection state of the first transmission member and the second transmission member; when the active gear rotating part is separated from the driven gear transmission part, it is the separation state of the first transmission member and the second transmission member.

[0011] In one of the embodiments, the circumference of the incomplete driving gear includes a first circumferential area and a second circumferential area, the driving tooth transmission part is only arranged in the first circumferential area, and the second circumferential area of ​​the incomplete driving gear is used to approach the driven tooth transmission part and maintain a preset gap with the driven tooth transmission part after the driving tooth transmission part is separated from the driven tooth transmission part.

[0012] In one of the embodiments, the transmission shaft is provided with a lower transmission shaft section and an upper transmission shaft section which are connected to each other, the driven gear is mounted on the lower transmission shaft section, and the upper transmission shaft section is used to output power.

[0013] In one of the embodiments, a heat-resistant layer is connected between the lower section of the transmission shaft and the upper section of the transmission shaft.

[0014] In one of the embodiments, the heat-resistant layer includes a plurality of heat-resistant protrusions, one end of each heat-resistant protrusion is fixedly connected to the end of the upper section of the transmission shaft, and the other end of each heat-resistant protrusion is fixedly connected to the end of the lower section of the transmission shaft.

[0015] In one of the embodiments, the transmission shaft is provided with a cooling assembly, and the cooling assembly is installed on the outer wall of the transmission shaft.

[0016] In one of the embodiments, the cooling assembly includes a fluid cooling sleeve, which is installed on the outer wall of the lower section of the transmission shaft, and the fluid cooling sleeve is provided with a fluid cooling circulation structure.

[0017] The embodiment of the second aspect of the present application provides a high temperature furnace, comprising:

[0018] A furnace body, wherein a component to be driven is arranged in the furnace body;

[0019] In the power transmission mechanism described in any of the above embodiments, one end of the transmission shaft of the power transmission mechanism is arranged inside the furnace body and drivingly connected to the driven member, and the other end is arranged outside the furnace body and drivingly connected to the second transmission member.

[0020] In one of the embodiments, the furnace body is provided with a connection port for the transmission shaft to pass through, and a sealing strip is provided between the connection port and the transmission shaft.

[0021] According to the power transmission mechanism and high temperature furnace of the embodiment of the present application, the power element is connected to the drive shaft through an intermittent transmission assembly, and the first transmission member and the second transmission member are switched between the drive connection state and the separation state to realize the drive connection or separation between the power element and the drive shaft. When there is no power transmission demand, the first transmission member and the second transmission member are switched to the separation state, cutting off the heat transfer path, isolating heat conduction, preventing the drive shaft from transferring heat to the power element, avoiding high temperature damage, and protecting the power element. Prolonging the service life of the power element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic structural diagram of a power transmission mechanism and a high-temperature furnace according to an embodiment of the present application.

[0023] FIG. 2 is a schematic diagram of the partial structure of a power transmission mechanism and a high-temperature furnace according to an embodiment of the present application.

[0024] FIG. 3 is a schematic diagram of a partial structure of a power transmission mechanism according to an embodiment of the present application.

[0025] Reference numerals:

[0026] 100. power element; 110. power output shaft;

[0027] 200, first transmission member; 210, incomplete driving gear; 211, driving gear transmission part; 212, second circumferential region;

[0028] 300, second transmission member; 310, driven gear; 311, driven gear transmission part;

[0029] 400, transmission shaft; 410, lower section of transmission shaft; 420, upper section of transmission shaft; 430, heat-resistant layer;

[0030] 500, cooling assembly; 510, fluid cooling jacket; 520, inlet pipe; 530, outlet pipe;

[0031] 600, furnace body; 610, sample tray; 620, sample dish; 630, connection port; 640, sealing strip; 641, fixing part. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0038] In some manufacturing industries, samples need to be rotated, lifted, and moved in a specific environment of a high-temperature furnace, so a transmission shaft needs to be extended from the outside into the high-temperature furnace for mechanical transmission. Currently, most high-temperature furnace equipment on the market, such as thermal mass analyzers, ignition residue analyzers, ash analyzers, thermogravimetric analyzers, elemental analyzers, etc.

[0039] The inventors have noticed that one end of the transmission shaft is subjected to the high temperature in the high-temperature furnace, while the other end outside the furnace acts as a heating rod, which continuously conducts heat out. The power transmission component is easily damaged by high temperature, which affects the service life of the power transmission component.

[0040] In order to alleviate the problem that the power transmission components are easily damaged by high temperatures, the inventors have designed a power transmission mechanism and a high-temperature furnace after in-depth research. By setting the drive connection state and the separation state on the power transmission mechanism, the drive shaft can be insulated to protect the power transmission components. The solution is to reduce the heat conduction to the power transmission components; solve the long-term rigid contact heat conduction between the drive shaft and the transmission mechanism, and improve the stability and life of the mechanism.

[0041] Referring to FIG. 1 , at least one embodiment of the present application proposes a power transmission mechanism, which includes a power element 100, an intermittent transmission assembly, and a transmission shaft 400. The intermittent transmission assembly includes a first transmission member 200 and a second transmission member 300. The first transmission member 200 and the second transmission member 300 have a driving connection state and a separation state. The first transmission member 200 is drivingly connected to the power element 100, and the first transmission member 200 switches between the driving connection state and the separation state through the power element 100 and the second transmission member 300. The transmission shaft 400 is drivingly connected to the second transmission member 300.

[0042] According to the power transmission mechanism of the embodiment of the present application, the power element 100 is driven and connected to the transmission shaft 400 through an intermittent transmission assembly, and the first transmission member 200 and the second transmission member 300 are switched between the drive connection state and the separation state to realize the drive connection or separation of the power element 100 and the transmission shaft 400. When there is no power transmission demand, the first transmission member 200 and the second transmission member 300 are switched to the separation state, cutting off the heat transfer path, isolating heat conduction, preventing the transmission shaft 400 from transferring heat to the power element 100, avoiding high temperature damage, and protecting the power element 100. The service life of the power element 100 is improved.

[0043] It is understood that in some embodiments, the intermittent contact method of the intermittent transmission component includes but is not limited to incomplete gear transmission, gear and pin matching transmission, connecting rod and slide rod pushing, clamping release mechanism, etc. The intermittent transmission component can also adopt direct contact transmission, such as gear transmission, connecting rod mechanism, synchronous wheel, sprocket, etc.

[0044] Referring to FIG. 2 and FIG. 3, in some embodiments, the first transmission member 200 includes an incomplete driving gear 210, and a driving gear transmission part 211 is arranged on the circumference of the incomplete driving gear 210. The second transmission member 300 includes a driven gear 310, and a driven gear transmission part 311 is arranged on the circumference of the driven gear 310. When the driving gear transmission part 211 is meshed with the driven gear transmission part 311, the first transmission member 200 and the second transmission member 300 are in a driving connection state; when the driving gear rotating part is separated from the driven gear transmission part 311, the first transmission member 200 and the second transmission member 300 are in a separation state.

[0045] 2 and 3 , in some embodiments, the circumference of the incomplete driving gear 210 includes a first circumferential region and a second circumferential region 212, the driving gear transmission part 211 is only arranged in the first circumferential region, and the second circumferential region 212 of the incomplete driving gear 210 is used to approach the driven gear transmission part 311 and maintain a preset gap with the driven gear transmission part 311 after the driving gear transmission part 211 is separated from the driven gear transmission part 311.

[0046] In some embodiments, the power element 100 includes a driving motor, the driving motor is provided with a power output shaft 110, and the incomplete driving gear 210 is installed on the power output shaft 110. The power element 100 drives the incomplete driving gear 210 to rotate through the power output shaft 110. When there is a transmission demand, the incomplete driving gear 210 and the driven gear 310 are driven and connected, and the driving tooth transmission part 211 and the driven tooth transmission part 311 are engaged to achieve power transmission. When there is no transmission demand, the incomplete driving gear 210 and the driven gear 310 are separated, and the second circumferential area 212 maintains a preset gap with the driven tooth transmission part 311, so that the incomplete driving gear 210 and the driven gear 310 are disengaged and released, isolating the conduction of heat.

[0047] Referring to FIG. 2 , in some embodiments, the transmission shaft 400 is provided with a transmission shaft lower section 410 and a transmission shaft upper section 420 connected to each other, the driven gear 310 is mounted on the transmission shaft lower section 410, and the transmission shaft upper section 420 is used to output power. The driven gear 310 is rigidly connected to the transmission shaft lower section 410. The transmission shaft 400 is of one-piece type or multi-section type, and the multi-section type has a small area contact between the sections: In order to further increase the thermal resistance of the transmission shaft 400, the transmission shaft 400 is of multi-section type, and the contact area between the sections is as small as possible, including but not limited to point type, line connection type, ring type, arc type, etc.

[0048] In some embodiments, the transmission shaft 400 is made of a material that is resistant to high temperatures and has high thermal resistance.

[0049] 2 , in some embodiments, a heat-resistance layer 430 is connected between the lower section 410 of the transmission shaft and the upper section 420 of the transmission shaft. The heat-resistance layer 430 prevents heat from being transferred between the lower section 410 of the transmission shaft and the upper section 420 of the transmission shaft.

[0050] In some embodiments, the heat-resistant layer 430 includes a plurality of heat-resistant protrusions, one end of which is fixedly connected to the end of the upper section 420 of the transmission shaft, and the other end is fixedly connected to the end of the lower section 410 of the transmission shaft. The heat-resistant protrusions make the contact area between the lower section 410 of the transmission shaft and the upper section 420 of the transmission shaft as small as possible, and the small contact area is used to increase thermal resistance and reduce heat conduction.

[0051] It can be understood that, in some embodiments, the heat-resistant layer 430 can be configured as a fixed contact transmission chain with a small area.

[0052] Referring to FIG. 1 , in some embodiments, the transmission shaft 400 is provided with a cooling assembly 500, and the cooling assembly 500 is installed on the outer wall of the transmission shaft 400. The cooling assembly 500 has the effect of reducing the heat of the transmission shaft 400. In order to increase the thermal resistance and reduce the heat conducted to the lower structure through the transmission shaft 400, the transmission shaft 400 is provided with a cooling assembly 500 to insulate and cool the transmission shaft 400. The cooling assembly 500 includes but is not limited to fluid circulation cooling, fin-type air cooling, refrigeration plate cooling, etc.

[0053] Specifically, referring to FIG. 2 , in some embodiments, the cooling assembly 500 includes a fluid cooling jacket 510 , which is installed on the outer wall of the lower section 410 of the transmission shaft, and the fluid cooling jacket 510 is provided with a fluid cooling circulation structure.

[0054] Specifically, the fluid cooling circulation structure includes a fluid channel arranged in the fluid cooling sleeve 510, and the fluid cooling sleeve 510 is also provided with an inlet pipe 520 and an outlet pipe 530 connected to the fluid channel, so that the fluid medium used for cooling enters the fluid cooling sleeve 510 through the inlet pipe 520, realizes heat transfer with the lower section 410 of the transmission shaft 400, realizes the cooling effect, and then flows out of the fluid cooling sleeve 510 from the outlet pipe 530 to realize the fluid cooling circulation.

[0055] Specifically, the fluid cooling jacket 510 can use different fluid media for circulation cooling, such as water, oil, salt water, air, and other fluid substances.

[0056] Referring to Figure 1, at least one embodiment of the present application proposes a high-temperature furnace, including a furnace body 600 and a power transmission mechanism of any one of the above-mentioned embodiments, a driven part is arranged in the furnace body 600, one end of a transmission shaft 400 of the power transmission mechanism is arranged in the furnace body 600 and is drivingly connected to the driven part, and the other end is arranged outside the furnace body 600 and is drivingly connected to the second transmission member 300.

[0057] In some embodiments, the driven member may include a sample tray 610, on which a number of sample dishes 620 are mounted, and the object to be tested is placed in the sample dish 620. The sample tray 610 is rigidly connected to the transmission shaft 400. When the object to be tested is in a high temperature environment in the furnace body 600 space, the heat will be transferred to the lower structure through the transmission shaft 400, resulting in an overly high temperature of the lower structure, thereby transferring the heat to the power element 100, damaging the mechanical parts, electronic components, etc. of the power element 100, and failing to complete the predetermined transmission target. In addition, the high temperature of the transmission shaft 400 may cause risks such as burns and fires. Applying a power transmission mechanism to the high temperature furnace in the embodiment of the present application can solve the above problems well. When there is no power transmission demand, the first transmission member 200 and the second transmission member 300 are switched to a separated state, cutting off the heat transfer path, isolating heat conduction, preventing the transmission shaft 400 from transferring heat to the power element 100, avoiding high temperature damage, and protecting the power element 100. Improve the service life of the power element 100.

[0058] In some embodiments, the furnace body 600 is made of a material with low thermal conductivity to reduce high-temperature heat loss in the furnace body 600 .

[0059] In some embodiments, the power transmission mechanism is integrally provided with a lifting mechanism, so that the transmission shaft 400, the fluid cooling sleeve 510, the sample tray 610 and the sample dish 620 can be lifted and rotated together to achieve a predetermined movement target.

[0060] Referring to FIG. 2 , in some embodiments, the furnace body 600 is provided with a connection port 630 for the transmission shaft 400 to pass through, and a sealing strip 640 is provided between the connection port 630 and the transmission shaft 400. Specifically, the sealing strip 640 is fixed at the connection port 630 by a fixing member 641, and the diameter of the transmission shaft 400 at the connection port 630 is slightly smaller than the diameter of the connection port 630, so that a gap is formed between the outer wall of the transmission shaft 400 and the inner wall of the connection port 630 to reduce the transfer of heat. In addition, the connection port 630 is sealed by the sealing strip 640, so as to reduce the leakage of heat in the furnace body 600 generated by the connection port 630, and isolate the high temperature environment inside the furnace body 600 of the high temperature furnace and the power transmission components below.

[0061] According to the high temperature furnace of the embodiment of the present application, the power element 100 is connected to the drive shaft 400 by an intermittent transmission assembly, and the first transmission member 200 and the second transmission member 300 are switched between the drive connection state and the separation state to realize the drive connection or separation of the power element 100 and the drive shaft 400. The thermal resistance of the drive shaft 400 can be increased, and the high temperature heat conduction of the furnace body 600 to the power transmission assembly is reduced, while the power transmission assembly is protected. The heat conduction to other external components and electrical appliances through the drive shaft 400 is reduced, which protects the safety of the instrument and prevents the risk of burns and fires.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0063] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A power transmission mechanism, characterized in that: include: Power components; An intermittent transmission assembly, the intermittent transmission assembly comprising a first transmission member and a second transmission member, the first transmission member and the second transmission member having a driving connection state and a separation state, the first transmission member being drivingly connected to the power element, the first transmission member switching between the driving connection state and the separation state through the power element and the second transmission member; A transmission shaft is drivingly connected to the second transmission member.

2. The power transmission mechanism according to claim 1, characterized in that: The first transmission member comprises an incomplete driving gear, and a driving tooth transmission part is arranged on the circumference of the incomplete driving gear; The second transmission member comprises a driven gear, and a driven gear transmission part is arranged on the circumference of the driven gear; Among them, when the active gear transmission part is meshed with the driven gear transmission part, it is the driving connection state of the first transmission member and the second transmission member; when the active gear rotating part is separated from the driven gear transmission part, it is the separation state of the first transmission member and the second transmission member.

3. The power transmission mechanism according to claim 2, characterized in that: The circumference of the incomplete driving gear includes a first circumferential area and a second circumferential area, the driving tooth transmission part is only arranged in the first circumferential area, and the second circumferential area of ​​the incomplete driving gear is used to approach the driven tooth transmission part and maintain a preset gap with the driven tooth transmission part after the driving tooth transmission part is separated from the driven tooth transmission part.

4. The power transmission mechanism according to claim 2, characterized in that: The transmission shaft is provided with a transmission shaft lower section and a transmission shaft upper section which are connected to each other, the driven gear is installed on the transmission shaft lower section, and the transmission shaft upper section is used for outputting power.

5. The power transmission mechanism according to claim 2, characterized in that: A heat-resistant layer is connected between the lower section of the transmission shaft and the upper section of the transmission shaft.

6. The power transmission mechanism according to claim 5, characterized in that: The heat-resistant layer includes a plurality of heat-resistant protrusions, one end of each heat-resistant protrusion is fixedly connected to the end of the upper section of the transmission shaft, and the other end of each heat-resistant protrusion is fixedly connected to the end of the lower section of the transmission shaft.

7. The power transmission mechanism according to claim 4, characterized in that: The transmission shaft is provided with a cooling assembly, and the cooling assembly is installed on the outer wall of the transmission shaft.

8. The power transmission mechanism according to claim 7, characterized in that: The cooling assembly comprises a fluid cooling sleeve, which is mounted on the outer wall of the lower section of the transmission shaft and is provided with a fluid cooling circulation structure.

9. A high temperature furnace, characterized in that: include: A furnace body, wherein a component to be driven is arranged in the furnace body; The power transmission mechanism according to any one of claims 1 to 8, wherein one end of the transmission shaft of the power transmission mechanism is arranged inside the furnace body and drivingly connected to the driven member, and the other end is arranged outside the furnace body and drivingly connected to the second transmission member.

10. The high temperature furnace according to claim 9, characterized in that: The furnace body is provided with a connection port for the transmission shaft to pass through, and a sealing strip is provided between the connection port and the transmission shaft.

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