CN218503540U - External transmission mechanism, vacuum box and vacuum reflow soldering furnace in vacuum high-temperature occasions - Google Patents
External transmission mechanism, vacuum box and vacuum reflow soldering furnace in vacuum high-temperature occasions Download PDFInfo
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Abstract
The utility model relates to a reflow soldering stove technical field, in particular to external drive mechanism, vacuum box and vacuum reflow soldering stove of vacuum high temperature occasion. An external transmission mechanism for vacuum high-temperature occasions is disclosed, wherein a vacuum transmission flange and a gas sealing flange are sleeved on a transmission shaft; the vacuum transmission flange is provided with a high-temperature resistant sealing ring and a vacuum sealing ring; and the gas sealing flange is provided with a gas sealing ring. The utility model discloses a vacuum box, tool conveying mechanism, tool width adjustment mechanism connect as above the external drive mechanism of vacuum high temperature occasion. A vacuum reflow oven is disclosed, comprising a vacuum box as described above; the gas sealing flange is fixed on the side wall body of the bottom. The technology adopts standard parts which are easy to purchase in the market, and has the advantages of low cost, safety, reliability and convenient installation. The transmission mechanism has high coaxiality of the whole structure and is convenient to install and maintain. The structure and the function are easy to realize, and due to the existence of multiple sealing, the sealing effect is better, and the sealing is not easy to lose efficacy.
Description
Technical Field
The utility model relates to a reflow soldering stove technical field especially relates to external drive mechanism, vacuum box and vacuum reflow soldering stove of vacuum high temperature occasion.
Background
Reflow ovens are also known as reflow ovens, or reflow ovens, or reflow ovens. A reflow furnace is a device required by SMT (surface mount technology) process in the electronic technology industry. The reflow oven provides a heated environment for soft soldering of mechanical and electrical connections between the solder terminals, pins and pads of the printed board of the surface mount device by re-melting the paste soft solder pre-dispensed onto the pads of the printed board. The reflow furnace is protected by nitrogen, so that materials which are easy to oxidize, such as soldering tin, silver and the like in a reflow region, are prevented from being oxidized at a high temperature, and welding defects are avoided. The reflow oven is the last key process of SMT, and the setting of the temperature curve is the most important and directly determines the quality of reflow soldering.
With the miniaturization and multi-specification development of the electronic industry, the requirement on product quality is higher and higher, and in order to reduce the product defects caused by welding, the vacuum reflow soldering furnace with the vacuum device gradually starts to be widely applied. The vacuum device can effectively reduce the size and the number of soldering tin cavities during welding of the reflow oven, and improve the welding quality. The quality and handling of the vacuum reflow oven directly affects the quality of the final product and once the soldering process is completed, the repair of defective solder joints, components or circuit boards becomes very complicated and costly.
The existing vacuum reflow soldering furnace generally needs to be filled with N 2 And an independent chain transmission mechanism is arranged in the vacuum box. The transmission mechanism in the vacuum box needs external power transmission. And the vacuum box is internally provided with heating equipment, and the temperature in the box body is about 300 ℃, so the vacuum box is used in a high-temperature situation. Therefore, the motor is generally only externally arranged and is usually arranged on a rack, and the existence of a transmission shaft is used for preventing N 2 Escape while preventing outside air from entering the furnace, requiring effective sealing. Meanwhile, the process in the vacuum box requires that the vacuum degree is generally 200-1000Pa; the drive shaft also needs to be reliably sealed as it enters the vacuum box to maintain the vacuum requirements within the vacuum box.
The above illustrates the high temperature, rough vacuum environment of the vacuum box in the vacuum reflow oven. The high-temperature-resistant sealing device has high requirements on high temperature resistance and sealing performance of an external transmission mechanism. At present, only a common driving mechanism sold in the market can be adopted for driving, so that the whole air tightness in the vacuum reflow soldering furnace is deteriorated, and the soldering quality is influenced. Meanwhile, the temperatures in the vacuum reflow soldering furnace chamber and the vacuum box are very high, the common driving mechanism is not heat-resistant, is easy to deform, has short service life, is very troublesome to maintain, and wastes time and labor.
In another prior art, the sealing of the external transmission of the vacuum box adopts magnetic fluid with water cooling transmission. The peripheral structure of the magnetic fluid needs to be customized by a professional manufacturer, and a water cooling system is needed during use, so that the high-temperature failure of the magnetic fluid is prevented. The structure is complex, the installation is difficult, the cost is high, and the risk of leakage in a high-temperature environment exists.
With regard to the magnetic fluid, it is to be noted that: the magnetic fluid seal is formed by an external magnetic field between a magnetic pole and a magnetic conduction shaft or a magnetic conduction shaft sleeve to form a strong magnetic field loop. And filling a ferromagnetic fluid as a sealant in the gap between the magnetic pole and the magnetic conduction shaft. Under the constraint of the magnetic field, the ferrofluid forms a liquid o-shaped ring in the gap to fill the gap, thereby achieving the sealing purpose.
The magnetic fluid has wide application in vacuum sealing and dust-proof sealing, and the sealing pressure is 1.33x10 -6 Pa-6MPa, shaft diameter of 1.625mm, and rotation speed up to 15000r/min.
However, the magnetic fluid seal cannot resist high pressure difference and high temperature. The existing ferrofluid can bear a limited variety of media, and a cooling measure is adopted for a countermeasure under a high-temperature condition. The magnetic flow end seal with the cooling water jacket can be continuously used at the ambient temperature of below 93 ℃. In order to avoid the carrier liquid from condensing at low temperature, the magnetic fluid using a normal ice machine oil as the carrier liquid can be applied at-50 ℃. The magnetic fluid seal should be used in combination with other types of seals for high pressure conditions.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing external drive mechanism, vacuum chamber and vacuum reflow oven of vacuum high temperature occasion to sealed effect is not good among the solution prior art, above-mentioned technical problem that use cost is higher than normal.
In order to realize the above purpose, on the one hand, the utility model discloses a technical scheme be:
the external transmission mechanism in the vacuum high-temperature occasion comprises a transmission shaft; a vacuum transmission flange and a gas sealing flange are sequentially sleeved on the transmission shaft from the output end to the input end; the first end of the vacuum transmission flange is close to the output end, and the end face of the first end is provided with a high-temperature-resistant sealing ring; a vacuum sealing ring is arranged between the second end of the vacuum transmission flange and the transmission shaft; and a gas sealing ring is arranged between the gas sealing flange and the transmission shaft.
Preferably, the transmission shaft is sleeved with an outer transmission flange, and the outer transmission flange is close to the input end of the transmission shaft; a circular mounting hole is formed in the outer transmission flange, and a POM support ring is fixedly connected in the mounting hole; the center of the POM support ring penetrates through the transmission shaft, and the transmission shaft is in running fit with the POM support ring.
Preferably, the outer transmission flange is fixedly connected with power equipment, and the power equipment is in transmission connection with the input end of the transmission shaft.
Preferably, the output end of the transmission shaft is connected with an inner coupling, and the inner coupling is used for being connected with a movement mechanism in a vacuum high-temperature occasion to transmit power.
Preferably, the positions on the transmission shaft corresponding to the two ends of the vacuum transmission flange are respectively clamped with a retainer ring, the retainer rings are jointed with the end part of the vacuum transmission flange, and the retainer rings are used for preventing the transmission shaft from axially moving.
Preferably, the vacuum transmission flange is provided with a blind hole, and the bottom surface of the blind hole is provided with an annular groove for filling glue; the vacuum seal ring is a lip-shaped seal ring, and the back of the lip-shaped seal ring is abutted to the bottom surface of the blind hole.
On the other hand, the utility model discloses a technical scheme do:
a vacuum box having a heating device; a jig conveying mechanism and/or a jig width adjusting mechanism are arranged in the vacuum box, and the jig conveying mechanism and the jig width adjusting mechanism are connected with the external transmission mechanism in any one of the vacuum high-temperature occasions; the first end of the vacuum transmission flange is fixedly connected with the outer wall of the vacuum box.
Preferably, a graphite bearing is arranged between the first end of the vacuum transmission flange and the transmission shaft.
On the other hand, the utility model discloses a still another technical scheme does:
the vacuum reflow soldering furnace comprises a frame and a sealed box body surrounded by side walls of a bottom; the vacuum box is arranged on the rack; the gas sealing flange is fixed on the side wall body at the bottom, and the gas sealing ring is used for sealing the box body to prevent the protective gas in the box body from escaping.
The utility model has the advantages that:
the external transmission mechanism in the vacuum high-temperature occasion is formed by combining standard parts which are easy to purchase in the market and machined parts which are easy to produce; low cost, safety, reliability and convenient installation. And mainly comprises 1 transmission shaft and 1 vacuum transmission flange; simple structure and compact volume. The whole structure has high coaxiality and convenient installation and maintenance. No water cooling and no extra filling of protective gas (usually N) 2 ) Leakage is prevented, maintenance is basically free from being carried out, and the running cost of the machine is saved. The transmission mechanism does not need specially customized outsourcing parts, so that the cost is low and can be effectively controlled; the structure and the function are easy to realize, and the sealing effect is better due to the existence of multiple seals, and the seal is not easy to lose efficacy.
The vacuum box and the vacuum reflow soldering furnace with the external transmission mechanism also have the corresponding technical effects, and are not repeated.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the present application, and the description and illustrative embodiments of the present application are provided to explain the present application and not to limit the present application. In the drawings:
fig. 1 and 2 are schematic structural views of different viewing angles of a preferred embodiment of the present invention;
FIG. 3 is a schematic half-section view of FIGS. 1 and 2;
fig. 4 is a schematic structural diagram of a second preferred embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a second preferred embodiment of the present invention.
Reference numerals:
1-a vacuum transmission flange; 2-a transmission shaft; 3-vacuum seal ring end cover; 4-a screw; 5-a right-angle reduction box; 6-outer driving flange; 7-a motor; 8-an external coupling; 9-POM support ring; 10-high temperature resistant sealing ring; 11-gas seal ring; 12-a gas tight flange; 13-stainless steel thin gaskets; 14-a retainer ring; 15-vacuum sealing ring; 16-inner coupling; 17-a graphite bearing; 18-a frame; 19-bottom side wall; 20-vacuum box; 21-chain transmission mechanism.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to the attached drawings. It should be understood that the structure, proportion, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention does not have the substantial technical significance, and the modification of any structure, the change of the proportion relation or the adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example one
Referring to fig. 1-3, the present invention provides an external transmission mechanism for vacuum high temperature applications, which includes a transmission shaft 2; the vacuum transmission flange 1 and the gas sealing flange 12 are sequentially sleeved on the transmission shaft 2 from the output end to the input end; the first end of the vacuum transmission flange 1 is close to the output end, and the end face of the first end is provided with a high-temperature-resistant sealing ring 10; a vacuum sealing ring 15 is arranged between the second end of the vacuum transmission flange 1 and the transmission shaft 2; and a gas sealing ring 11 is arranged between the gas sealing flange 12 and the transmission shaft 2.
The external transmission mechanism for the vacuum high-temperature occasion solves the problems that the prior art needs to be customized and needs a water cooling system, so that the cost is high and the installation and debugging are complex. The tool is formed by combining standard parts which are easy to purchase in the market and machining parts which are easy to produce; low cost, safety, reliability and convenient installation. And mainly comprises 1 transmission shaft 2,1 vacuum transmission flange 1, simple structure, compact. The coaxiality of the whole structure is high, and the installation and the maintenance are convenient. No need of water cooling and no need of additional filling of protective gas (usually N) 2 ) Leakage is prevented, maintenance is basically free from being carried out, and the running cost of the machine is saved. The transmission mechanism does not need specially customized outsourcing parts, so that the cost is low and can be effectively controlled; the structure and the function are easy to realize, and due to the existence of multiple sealing, the sealing effect is better, and the sealing is not easy to lose efficacy. The vacuum box 20 and the bottom side wall 19 are effectively sealed at the same time. The high-temperature end of the transmission shaft 2 is supported by a graphite bearing 17, and the frame 18 is supported by POM, so that the structure is stable.
The external transmission mechanism in the vacuum high-temperature occasion is further improved as follows:
regarding the transmission shaft 2, an outer transmission flange 6 is sleeved on the transmission shaft 2, and the outer transmission flange 6 is close to the input end of the transmission shaft 2; the outer transmission flange 6 is a mounting support for a motor 7, a reduction gearbox (the motor 7 and the reduction gearbox form power equipment), a POM support ring 9 and the like. Specifically, the outer transmission flange 6 is fixedly connected with power equipment, and the power equipment is in transmission connection with the input end of the transmission shaft 2. The input end of the transmission shaft 2 is connected with the transmission shaft 2 and the reduction gearbox through an external coupler 8, and the reduction gearbox is generally set to be a right-angle reduction gearbox 5 and used for changing the installation direction of the motor 7 and increasing the torque of the motor 7. In the above, the external driving mode can be changed into other modes or indirect driving, and is not directly connected. In addition, a circular mounting hole is formed in the outer transmission flange 6, and a POM support ring 9 is fixedly connected in the mounting hole; the center of the POM support ring 9 penetrates into the transmission shaft 2, and the transmission shaft 2 is in running fit with the POM support ring 9. The POM support ring 9 is an external support for the rotational movement of the propeller shaft 2 and prevents the propeller shaft 2 from bending and sagging. Because the transmission shaft 2 adopts the POM as the rotary motion support outside, does not need to add parts such as a bearing and the like, and has simple structure.
Meanwhile, an inner coupling 16 is connected to the output end of the transmission shaft 2, and the inner coupling 16 is used for connecting with a movement mechanism inside the vacuum box 20 for power transmission.
The middle transmission shaft 2 may have an axial movement phenomenon under the driving of the power equipment. At this moment, the positions, corresponding to the two ends of the vacuum transmission flange 1, of the transmission shaft 2 are respectively clamped with a retainer ring 14, the retainer rings 14 are connected with the end portion of the vacuum transmission flange 1, and the retainer rings 14 are used for preventing the transmission shaft 2 from axially moving.
Regarding the sealing:
1. the refractory seal ring 10 is typically provided as a refractory o-ring, which is a static seal between the vacuum transmission flange 1 and the vacuum box 20.
2. The vacuum seal ring 15 is a lip seal ring. The vacuum transmission flange 1 is provided with a blind hole, and the bottom surface of the blind hole is provided with an annular groove for filling glue; the back of the lip-shaped sealing ring is abutted against the bottom surface of the blind hole.
3. The gas seal ring 11 is normally set to N 2 The sealing O-shaped ring is a sealing ring for the rotary motion of the transmission shaft 2 and can prevent N 2 And (4) leakage. At this time, correspondingly, the gas sealing flange 12 is N 2 Sealing flange of N 2 And a mounting seat for sealing the o-shaped ring.
The technical scheme is elaborated from another aspect to facilitate clearer understanding.
An external transmission mechanism for vacuum high-temperature occasions comprises:
1. the vacuum transmission flange 1 is used for connecting and supporting the whole transmission mechanism and the vacuum box 20;
2. a transmission shaft 2 which is a power transmission part for transmitting the power of an external motor 7 to the vacuum box 20;
3. the vacuum sealing ring end cover 3 is used for pressing the vacuum sealing ring 15;
4. the screw 4 is used for installing the vacuum sealing ring end cover 3;
5. the right-angle reduction box 5 is used for changing the installation direction of the motor 7 and increasing the torque of the motor 7;
6. the mounting supports of an external transmission flange 6, a motor 7, a reduction gearbox, a POM support ring 9 and the like;
7. a motor 7, typically a servo motor, is an external power source; the design adopts an alternating current servo system;
8. the outer coupler 8 is used for realizing the transmission and connection of power between the transmission shaft 2 and the reduction gearbox;
9. the POM support ring 9 is an external support for the rotation motion of the transmission shaft 2 and prevents the transmission shaft 2 from bending and sagging;
10. the high-temperature-resistant sealing ring 10, which is usually a high-temperature-resistant o-shaped ring, is a static seal between the vacuum transmission flange 1 and the vacuum box 20;
11. gas seal 11, typically N 2 Sealing the o-ring against N 2 A sealing ring for the rotary motion of the leaked transmission shaft 2;
12. gas sealing flange 12, typically N 2 Sealing flange of N 2 A mounting support for sealing the o-shaped ring;
13. the stainless steel thin gasket 13 is used for reducing the friction between the check ring for the stainless steel shaft and the vacuum transmission flange 1 or the vacuum seal ring end cover 3;
14. a retainer ring 14, typically a stainless steel shaft retainer ring, which prevents the drive shaft 2 from moving axially;
15. the vacuum sealing ring 15 is a high-temperature resistant lip-shaped sealing ring and is used for vacuum sealing in a vacuum environment;
16. and the inner coupler 16 realizes power transmission and connection of the transmission shaft 2 and a movement mechanism in the vacuum box 20.
Example two
Referring to fig. 1-5, the present invention provides a vacuum box 20, wherein the vacuum box 20 has a heating device, and the heating device is used for realizing a vacuum reflow soldering process curve. The vacuum box 20 is provided with a jig conveying mechanism and/or a jig width adjusting mechanism inside, and the jig conveying mechanism and the jig width adjusting mechanism are connected with the external transmission mechanism in the vacuum high-temperature occasion of the first embodiment.
The jig conveying mechanism is used for conveying the jig to enter and exit the vacuum box 20, and the power external input of the jig conveying mechanism is derived from the external transmission mechanism of the vacuum high-temperature occasion in the first embodiment. Specifically, the vacuum box 20 has a chain transmission mechanism 21 therein, which is an independent horizontal motion transmission mechanism for the jig in the vacuum box 20, and the chain transmission mechanism 21 is coordinated with the upstream and downstream chains for the jig to move in and out. The external transmission mechanism in the first embodiment on the vacuum high-temperature occasion can also be used for external power input of the width adjusting mechanism in the vacuum box 20, and at this time, the structure of the external transmission mechanism may need to be slightly modified. In addition, the first end of the vacuum transmission flange 1 is fixedly connected with the outer wall of the vacuum box 20.
A graphite bearing 17 is arranged between the first end of the vacuum transmission flange 1 and the transmission shaft 2. The transmission shaft 2 adopts the graphite bearing 17 at a high temperature, and the graphite bearing 17 is high temperature resistant, self-lubricating and maintenance-free.
EXAMPLE III
Referring to fig. 1-5, the present invention provides a vacuum reflow furnace, which includes a frame 18, a sealed box surrounded by a bottom side wall 19; further comprises a vacuum box 20 of embodiment two; the gas sealing flange 12 is fixed on the side wall 19 at the bottom, and the gas sealing ring 11 is used for sealing the sealed box body to prevent the protective gas in the sealed box body from escaping.
Specifically, the frame 18 is the bottom support frame of the reflow oven. The bottom side wall body 19 is a functional structure at the bottom of the reflow soldering furnace, and the periphery of the bottom side wall body is encircled to form an open box body; when the furnace is closed, the upper part of the box body with the opening and the lower part of the box body are sealed by the high-temperature resistant silica gel sealing strip between the upper part of the box body and the lower part of the box body to form a complete sealing box body (except the inlet and the outlet which can not be completely sealed), and N is filled 2 And the process requirements are met. The vacuum box 20 is a process cavity which needs to be sealed, and the requirement of vacuum degree is ensured during vacuum pumping; the heating device is arranged in the vacuum reflow soldering device, and the vacuum reflow soldering process curve can be achieved. Chain in vacuum box 20The transmission mechanism 21 is an independent horizontal movement transmission mechanism for the jig in the vacuum box 20, and the jig can move in and out in cooperation with the upstream and downstream chain transmission mechanisms 21.
In the technical scheme, a static seal formed by a high-temperature resistant o-shaped ring is arranged between the vacuum flange and the vacuum box 20, so that the vacuum box 20 is prevented from leaking. N is arranged between the bottom side wall body 19 and the transmission shaft 2 2 Sealing against rotational movement by o-rings, preventing N 2 And escape. Furthermore, the graphite bearing 17 support is a rotary support for the vacuum box 20 side under high temperature conditions, and the POM support ring 9 is an external support for the transmission shaft 2 on the frame 18.
Wherein, in the above, all sealing rings can be changed into other types and specifications. The graphite bearing 17 and the POM supporting ring 9 can be replaced by other types and other materials.
The technical scheme is characterized in that:
(1) The vacuum seal of the transmission shaft 2 adopts a high-temperature-resistant PTFE lip-shaped seal ring, when the seal ring is installed in the vacuum transmission flange 1, the inner contact surface (an annular groove filled with glue is reserved during design) needs to be coated with high-temperature-resistant vacuum seal glue, and leakage between the side wall of the seal ring and the vacuum transmission flange 1 is prevented.
(2) The transmission shaft 2 adopts the graphite bearing 17 at a high temperature, and the graphite bearing 17 is high temperature resistant, self-lubricating and maintenance-free.
(3) The transmission shaft 2 is supported and rotated by the POM support ring 9 in the frame 18 (at normal temperature), and the POM has excellent self-lubricating performance and does not need lubrication maintenance.
(4) When the transmission shaft 2 passes through the bottom side wall body 19, N 2 The sealing adopts a high-temperature resistant o-shaped sealing ring, so that the structure is simple; the rotating speed of the transmission shaft 2 is low, the abrasion and the deformation are extremely small, and the maintenance is basically not needed.
(5) An external servo motor is directly driven by the transmission shaft 2 and is connected through an external coupler 8, so that intermediate transition links are reduced; simple structure, transmission efficiency is higher.
For the above embodiments, it should be noted that:
1. POM material
POM (polyoxymethylene resin) is a white or black plastic particle, has the characteristics of high hardness, high rigidity and high wear resistance, has excellent friction resistance, is commonly called as steel competition or steel seizing, and is the third most common engineering plastic. It is suitable for making wear-resisting parts, transmission parts, chemical engineering and instruments.
2. Vacuum sealing ring
PTFE stainless steel oil seal, the form has: single, double, three, four lips; the lip can be a forward lip or a reverse lip, or both the lip and the reverse lip can be provided. The lip part is made of a PTFE composite material, and the wear resistance and the fatigue resistance of the sealing lip are greatly improved through FDA environmental protection certification; the framework is made of 304/316 stainless steel (with good corrosion).
Working temperature: -90 to 260 degrees, instantaneous 300 degrees;
the highest rotating speed is as follows: line speed 25 m/s;
working pressure: single lip, vacuum to 1Mpa;
the application environment is as follows: the environment-friendly oil-free self-lubricating oil is resistant to strong acid, strong alkali or strong oxidant and the like, and is suitable for the processing environment of food and medical products with high cleanliness and an oil-free self-lubricating environment.
3. Graphite bearing
1. High temperature resistance: the graphite bearing has a melting point of 3850 +/-50 ℃ and a boiling point of 4250 ℃, and has small weight loss and small thermal expansion coefficient even if being burnt by an ultrahigh-temperature electric arc. The strength of graphite is enhanced with the increase of temperature, and at 2000 ℃, the strength of graphite is doubled.
2. Electric and thermal conductivity: the conductivity of the graphite bearing is one hundred times higher than that of the common non-metallic ore. The thermal conductivity exceeds that of metal materials such as steel, iron, lead and the like. The thermal conductivity decreases with increasing temperature and graphite forms a thermal insulator even at very high temperatures. Graphite is capable of conducting electricity because each carbon atom in graphite forms only 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transport charge.
3. Lubricity: the lubricating property of the graphite bearing depends on the size of graphite flakes, and the larger the flakes are, the smaller the friction coefficient is, and the better the lubricating property is.
4. Chemical stability: the graphite bearing has good chemical stability at normal temperature, and can resist acid, alkali and corrosion of organic solvents.
5. Plasticity: the graphite bearing has good toughness and can be rolled into a thin sheet.
6. Thermal shock resistance: the graphite bearing can withstand the drastic change of temperature without damage when used at normal temperature, and the volume change of the graphite is not large and cracks cannot be generated when the temperature changes suddenly.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The external transmission mechanism in the vacuum high-temperature occasion comprises a transmission shaft; the vacuum transmission device is characterized in that a vacuum transmission flange and a gas sealing flange are sequentially sleeved on the transmission shaft from the output end to the input end; the first end of the vacuum transmission flange is close to the output end, and the end face of the first end is provided with a high-temperature-resistant sealing ring; a vacuum sealing ring is arranged between the second end of the vacuum transmission flange and the transmission shaft; and a gas sealing ring is arranged between the gas sealing flange and the transmission shaft.
2. The external transmission mechanism for the vacuum high-temperature occasion according to claim 1, wherein the transmission shaft is sleeved with an external transmission flange, and the external transmission flange is close to the input end of the transmission shaft; a circular mounting hole is formed in the outer transmission flange, and a POM support ring is fixedly connected in the mounting hole; the center of the POM support ring penetrates into the transmission shaft, and the transmission shaft is in running fit with the POM support ring.
3. The external transmission mechanism for vacuum high temperature occasions according to claim 2, wherein the external transmission flange is fixedly connected with power equipment, and the power equipment is in transmission connection with the input end of the transmission shaft.
4. The external transmission mechanism for vacuum high temperature occasions according to claim 1, wherein the output end of the transmission shaft is connected with an internal coupling, and the internal coupling is used for being connected with a motion mechanism inside the vacuum high temperature occasions to transmit power.
5. An external transmission mechanism for vacuum high temperature occasions according to claim 1, wherein retaining rings are clamped on the transmission shaft at positions corresponding to the two ends of the vacuum transmission flange, the retaining rings are connected with the end parts of the vacuum transmission flange, and the retaining rings are used for preventing the transmission shaft from moving axially.
6. The external transmission mechanism for the vacuum high-temperature occasion according to claim 1, wherein the vacuum transmission flange is provided with a blind hole, and the bottom surface of the blind hole is provided with an annular groove for filling glue; the vacuum seal ring is a lip-shaped seal ring, and the back of the lip-shaped seal ring is abutted to the bottom surface of the blind hole.
7. A vacuum box having a heating device; the vacuum box is characterized in that a jig conveying mechanism and/or a jig width adjusting mechanism are arranged in the vacuum box, and the jig conveying mechanism and the jig width adjusting mechanism are connected with the external transmission mechanism in the vacuum high-temperature occasion according to any one of claims 1 to 6; the first end of the vacuum transmission flange is fixedly connected with the outer wall of the vacuum box.
8. The vacuum box as claimed in claim 7, wherein a graphite bearing is provided between the first end of the vacuum drive flange and the drive shaft.
9. The vacuum reflow soldering furnace comprises a frame and a sealed box body surrounded by side walls at the bottom; the vacuum box is characterized by further comprising the vacuum box as claimed in any one of claims 7 and 8, wherein the vacuum box is arranged on the machine frame; the gas sealing flange is fixed on the side wall body at the bottom, and the gas sealing ring is used for sealing the sealed box body to prevent the protective gas in the sealed box body from escaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222026226.1U CN218503540U (en) | 2022-08-02 | 2022-08-02 | External transmission mechanism, vacuum box and vacuum reflow soldering furnace in vacuum high-temperature occasions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222026226.1U CN218503540U (en) | 2022-08-02 | 2022-08-02 | External transmission mechanism, vacuum box and vacuum reflow soldering furnace in vacuum high-temperature occasions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218503540U true CN218503540U (en) | 2023-02-21 |
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ID=85206377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222026226.1U Active CN218503540U (en) | 2022-08-02 | 2022-08-02 | External transmission mechanism, vacuum box and vacuum reflow soldering furnace in vacuum high-temperature occasions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218503540U (en) |
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2022
- 2022-08-02 CN CN202222026226.1U patent/CN218503540U/en active Active
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