Vacuum carbonic acid furnace chamber

Abstract

The utility model discloses a kind of vacuum formic acid furnace cavities, including cavity main body, heating mechanism, conveying mechanism, conveying mechanism includes motor, transmission shaft, conveying shaft, transmission shaft is equipped with rotary sealing assembly in the junction of cavity main body, rotary sealing assembly includes rotary sealing seat, sealing gland, rotary sealing ring, spacer ring, rotary sealing seat is fixed on the outside of cavity main body, rotary sealing ring is mirror image symmetry and is set in rotary sealing seat, spacer ring is set between two rotary sealing rings, sealing gland is set in rotary sealing seat end portion.The utility model sets up motor in cavity main body outside, motor is not easy to damage in use process, set rotary sealing assembly, so that transmission shaft passes through universal joint and is connected with conveying shaft, so that conveying shaft has lifting movement space.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to a vacuum formic acid furnace cavity. Background Technology

[0002] A vacuum formic acid furnace is a specialized welding device that combines a vacuum environment with formic acid gas. It is widely used in power semiconductors, IGBT modules, LED packaging and other fields. Its core principle is to reduce oxidation reaction through a vacuum environment and use formic acid as a reducing agent to remove oxides from the welding surface, thereby achieving high-quality welding.

[0003] The cavity structure of the vacuum formic acid furnace includes a main cavity body, which is isolated from the external environment to create a vacuum environment inside. The main cavity body houses a heating mechanism and a conveying mechanism. It has an inlet and an outlet, and a lifting mechanism at its bottom. During operation, the lifting mechanism raises the conveying mechanism. The conveying mechanism receives a fixture containing the product from the inlet and moves it above the heating mechanism. The lifting mechanism then lowers the conveying mechanism, allowing the fixture to contact the heating mechanism and complete the product heating and welding. After welding, the lifting mechanism raises the conveying mechanism again, and the conveying mechanism delivers the fixture and product out of the main cavity body through the outlet.

[0004] The power component of the conveying mechanism is generally an electric motor. The motor works in a vacuum, strong reduction, and high heat environment inside the cavity, which makes it prone to damage. Utility Model Content

[0005] The purpose of this utility model is to provide a vacuum formic acid furnace cavity in which the motor of the conveying mechanism is located outside the cavity body, the transmission shaft does not damage the sealing performance of the cavity body, and the conveying shaft can receive the torque of the transmission shaft while also having lifting and moving space.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A vacuum formic acid furnace cavity includes a cavity body, a heating mechanism and a partial conveying mechanism inside the cavity body, an inlet and an outlet on the cavity body, and a lifting mechanism at the bottom of the cavity body. The conveying mechanism includes a motor, a drive shaft and a conveying shaft. The motor is located outside the cavity body, and the drive shaft passes through the cavity body. The outer end of the drive shaft is connected to the power output end of the motor through a coupling, and the inner end of the drive shaft is connected to the conveying shaft through a universal joint.

[0008] A rotary sealing assembly is provided at the connection between the drive shaft and the cavity body. The rotary sealing assembly includes a rotary sealing seat, a sealing cap, a rotary sealing ring, and a spacer. The rotary sealing seat is fixed on the outer side of the cavity body. There are two rotary sealing rings, which are arranged in a mirror image symmetrically within the rotary sealing seat. The spacer is disposed between the two rotary sealing rings. The sealing cap is disposed at the end of the rotary sealing seat to cooperate with the spacer and the rotary sealing seat to fix the position of the rotary sealing ring.

[0009] As a further improvement of the present invention, the rotary sealing assembly further includes an oil seal felt, which is located inside the spacer and between the two rotary sealing rings, and an oil injection hole is provided on the spacer in alignment with the oil seal felt.

[0010] As a further improvement of the present invention, the rotary sealing assembly further includes an O-ring, which is disposed on the mating surface between the rotary sealing seat and the cavity body.

[0011] As a further improvement of the present invention, the rotary sealing assembly further includes a bearing housing and two bearings. The bearing housing is fixed on the rotary sealing seat, and the two bearings are disposed inside the bearing housing. The two bearings are coaxial and spaced apart.

[0012] As a further improvement of the present invention, the heating mechanism includes a heating platform, which is fixedly disposed at the bottom inner side of the cavity body, and an electric heating rod is disposed inside the heating platform.

[0013] As a further improvement of the present invention, the conveying mechanism further includes two sets of sprocket structures extending between the feed inlet and the discharge outlet. The two sets of sprocket structures are located on both sides of the heating mechanism. Each set of sprocket structures includes a driving wheel and several driven wheels. The driving wheel is connected to the conveying shaft for transmission.

[0014] Compared with the prior art, the technical advantages of this utility model are as follows:

[0015] This invention places the motor outside the cavity body, so that the motor will not come into contact with the vacuum, strong reduction, and high heat environment inside the cavity body during use, and is not easily damaged.

[0016] The rotary sealing assembly is designed to ensure that the transmission shaft can deliver torque to the cavity body without compromising the airtightness of the cavity body. The rotary sealing assembly adopts a symmetrical design with double rotary sealing rings, which provides a good sealing effect on the outer circumference of the transmission shaft. The rotary sealing ring is fixed in place by a sealing gland, spacer ring, and rotary sealing seat, ensuring that the rotary sealing ring is firmly and reliably fixed.

[0017] The drive shaft and the conveyor shaft are connected by a universal joint, which allows the conveyor shaft to move up and down. Whether the conveyor shaft is in a high or low position, the drive shaft can transmit power to the conveyor shaft through the universal joint, causing the conveyor shaft to rotate. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a vacuum formic acid furnace cavity according to an embodiment of the present invention;

[0019] Figure 2 This is a top view of a vacuum formic acid furnace cavity according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0021] Figure 4 yes Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0022] Figure 5 This is an exploded structural diagram of the rotary sealing assembly in an embodiment of this utility model. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0024] Please see Figures 1 to 5 A vacuum formic acid furnace cavity includes a cavity body 1. The cavity body 1 is provided with a heating mechanism 2 and a partial conveying mechanism 3. The cavity body 1 has a feed inlet (not shown, the feed inlet is located on the side of the cavity body 1 parallel to the discharge outlet 4) and a discharge outlet 4. The bottom of the cavity body 1 is provided with a lifting mechanism 5. The conveying mechanism 3 includes a motor 31, a drive shaft 32 and a conveying shaft 33. The motor 31 is located outside the cavity body 1. The drive shaft 32 is installed through the cavity body 1. The outer end of the drive shaft 32 is connected to the power output end of the motor 31 through a coupling 34. The inner end of the drive shaft 32 is connected to the conveying shaft 33 through a universal joint 35.

[0025] A rotary sealing assembly 36 is provided at the connection between the drive shaft 32 and the cavity body 1. The rotary sealing assembly 36 includes a rotary sealing seat 361, a sealing cap 362, a rotary sealing ring 363, and a spacer 364. The rotary sealing seat 361 is fixed on the outer side of the cavity body 1. There are two rotary sealing rings 363, which are arranged in a mirror image symmetrically within the rotary sealing seat 361. The spacer 364 is disposed between the two rotary sealing rings 363. The sealing cap 362 is disposed at the end of the rotary sealing seat 361 to cooperate with the spacer 364 and the rotary sealing seat 361 to fix the position of the rotary sealing ring 363.

[0026] There are four sealing doors (not shown) at the inlet and outlet, and the sealing doors adopt the existing design.

[0027] The inner circumference of the rotary seal seat 361 is provided with a raised ring. A rotary seal ring 363 is installed on one side of the raised ring, and the bearing seat 365 described below is installed on the other side. A spacer ring 364, made of hard metal, is disposed between the two rotary seal rings 363. Figure 4 As can be seen, when the sealing cap 362 is fixed (by bolts) to the rotary sealing seat 361, the end face of the sealing cap 362 engages with the spacer 364 to clamp and fix the rotary sealing ring 363 on the left side, while the spacer 364 engages with the convex ring to clamp and fix the rotary sealing ring 363 on the right side. By controlling the degree of tightening of the sealing cap 362 (the depth to which the end face of the sealing cap 362 extends into the rotary sealing seat 361), the clamping force on the rotary sealing ring 363 can be adjusted. This structure has the advantage of firmly and reliably fixing the rotary sealing ring 363.

[0028] The rotary seal ring 363 is preferably a JO-type seal ring. The inner circumferential surfaces of the two rotary seal rings 363 press against the outer circumferential surface of the drive shaft 32, which has a good rotary sealing effect.

[0029] Furthermore, the rotary sealing assembly 36 also includes an oil seal felt 366, which is located inside the spacer 364 and between the two rotary sealing rings 363. The spacer 364 is provided with an oil injection hole aligned with the oil seal felt 366.

[0030] The oil seal felt 366 is impregnated with lubricating oil, which lubricates the contact surface between the rotary seal ring 363 and the drive shaft 32. The oil filling hole on the spacer ring 364 is used to replenish the lubricating oil to the oil seal felt 366.

[0031] Furthermore, the rotary sealing assembly 36 also includes an O-ring 367, which is disposed on the mating surface between the rotary sealing seat 361 and the cavity body 1.

[0032] Furthermore, the rotary sealing assembly 36 also includes a bearing housing 365 and two bearings 368. The bearing housing 365 is fixed on the rotary sealing seat 361, and the two bearings 368 are disposed within the bearing housing 365, coaxially spaced apart. The two coaxially arranged bearings 368 are used to position the drive shaft 32, preventing the drive shaft 32 from deviating from its axis during rotation.

[0033] Furthermore, the heating mechanism 2 includes a heating platform, which is fixedly disposed at the bottom inner side of the cavity body 1, and an electric heating rod is disposed inside the heating platform.

[0034] Furthermore, in this embodiment, the conveying mechanism 3 also includes two sets of sprocket structures 37 extending between the feed inlet and the discharge outlet 4. The two sets of sprocket structures 37 are located on both sides of the heating mechanism 2. Each set of sprocket structures 37 includes a driving wheel and several driven wheels. The driving wheel is connected to the conveying shaft 33 in a driving transmission.

[0035] The conveying shaft 33 passes through the drive wheels of the two sets of sprocket structures 37. The drive wheels of the sprocket structures 37 can drive the driven wheels to rotate via the track chain. The bottom sides of the fixture press against the track chain for conveying. The sprocket structure 37 also includes a U-shaped outer frame. The drive wheels and driven wheels are mounted on the outer frame and rotate. The top of the outer frame is open so that the track chain can contact the fixture. The bottom of the outer frame cooperates with the lifting mechanism 5. The sprocket structure 37 adopts the structural design of the existing vacuum formic acid furnace cavity, which will not be described in detail.

[0036] The lifting mechanism 5 is powered by a cylinder 52 and is equipped with four lifting rods 51. Two lifting rods 51 form a group and are aligned with the two ends of the sprocket structure 37 respectively. When the cylinder 52 drives the lifting rods 51 to move up and down, the lifting rods 51 can lift / lower the sprocket structure 37.

[0037] In other embodiments, a conventional horizontal conveying structure such as a gear pair with an outer frame can be used instead of the sprocket structure 37. This can achieve horizontal conveying of the fixture from the inlet to the outlet 4.

[0038] Compared with the prior art, the technical advantages of this utility model are as follows:

[0039] This invention places the motor 31 outside the cavity body 1, so that the motor 31 will not come into contact with the vacuum, strong reduction and high heat environment inside the cavity body 1 during use, and is not easily damaged.

[0040] The rotary sealing assembly 36 is provided so that the transmission shaft 32 can transmit torque to the cavity body 1 without compromising the airtightness of the cavity body 1 while conveying the rotating shaft 33 to the cavity body 1. The rotary sealing assembly 36 adopts a symmetrical design of double rotary sealing rings 363, which provides a good sealing effect on the outer circumference of the transmission shaft 32. The rotary sealing ring 363 is fixed in place by the sealing cover 362, the spacer 364, and the rotary sealing seat 361, ensuring that the rotary sealing ring 363 is firmly and reliably fixed.

[0041] The drive shaft 32 and the conveying shaft 33 are connected by a universal joint 35, which allows the conveying shaft 33 to have a lifting and lowering movement space. Whether the conveying shaft 33 is in a high position or a low position, the drive shaft 32 can drive the conveying shaft 33 through the universal joint 35, so that the conveying shaft 33 can rotate.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A vacuum formic acid furnace cavity, comprising a cavity body, a heating mechanism and a partial conveying mechanism arranged in the cavity body, a feeding port and a discharging port arranged on the cavity body, and a lifting mechanism arranged at the bottom of the cavity body, characterized in that, The conveying mechanism includes a motor, a drive shaft, and a conveying shaft. The motor is located outside the cavity body, and the drive shaft passes through the cavity body. The outer end of the drive shaft is connected to the power output end of the motor through a coupling, and the inner end of the drive shaft is connected to the conveying shaft through a universal joint. A rotary sealing assembly is provided at the connection between the drive shaft and the cavity body. The rotary sealing assembly includes a rotary sealing seat, a sealing cap, a rotary sealing ring, and a spacer. The rotary sealing seat is fixed on the outer side of the cavity body. There are two rotary sealing rings, which are arranged in a mirror image symmetrically within the rotary sealing seat. The spacer is disposed between the two rotary sealing rings. The sealing cap is disposed at the end of the rotary sealing seat to cooperate with the spacer and the rotary sealing seat to fix the position of the rotary sealing ring.

2. The vacuum formic acid furnace chamber of claim 1, wherein, The rotary sealing assembly also includes an oil seal felt, which is located inside the spacer and between the two rotary sealing rings. The spacer has an oil injection hole aligned with the oil seal felt.

3. The vacuum formic acid furnace chamber of claim 1, wherein, The rotary sealing assembly also includes an O-ring, which is disposed on the mating surface between the rotary sealing seat and the cavity body.

4. The vacuum formic acid furnace chamber of claim 1, wherein, The rotary seal assembly also includes a bearing housing and two bearings. The bearing housing is fixed on the rotary seal seat, and the two bearings are disposed inside the bearing housing. The two bearings are coaxial and spaced apart.

5. The vacuum formic acid furnace chamber of claim 1, wherein, The heating mechanism includes a heating platform, which is fixedly disposed at the bottom inner side of the cavity body, and an electric heating rod is disposed inside the heating platform.

6. The vacuum formic acid furnace chamber of claim 1, wherein, The conveying mechanism also includes two sets of sprocket structures extending between the feed inlet and the discharge outlet. The two sets of sprocket structures are located on both sides of the heating mechanism. Each set of sprocket structures includes a driving wheel and several driven wheels. The driving wheel is connected to the conveying shaft for transmission.

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