Loading and unloading device for vacuum furnace

Abstract

The utility model discloses a loading and unloading device for a vacuum furnace, which comprises a material bearing platform, the material bearing platform is provided with a material supporting and placing assembly for supporting and placing materials, the material supporting and placing assembly comprises a bearing plate, the material bearing platform is also provided with a lifting driving mechanism for driving the bearing plate to horizontally move along the length direction of the bearing plate, and the lifting driving mechanism is connected with the lifting driving mechanism. The lifting guide mechanism can lift the bearing plate under the driving of the lifting driving mechanism, and comprises a wedge-shaped block; the lifting guide mechanism further comprises a lifting operation bearing which can abut against and be in sliding connection with the inclined face of the wedge-shaped block to lift the bearing plate when the bearing plate moves horizontally in the length direction under the action of the lifting driving mechanism. According to the lifting guide mechanism, the requirement for the structural manufacturing precision is lowered, the installation and assembly difficulty is reduced, the service life is longer, and safety and stability are better.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum furnace auxiliary equipment, in particular to a loading and unloading device for a vacuum furnace. Background Art

[0002] As a vacuum heat treatment equipment, vacuum furnace has the characteristics of non-oxidative decarburization, high efficiency and energy saving, and is widely used in the production and manufacturing of parts in the fields of aviation, aerospace, military industry, nuclear industry, etc. The loading and unloading device is an automatic loading and unloading device for loading and unloading materials in the vacuum furnace. The existing loading and unloading device includes a moving mechanism arranged outside the furnace and a lifting platform installed on the moving mechanism. Slide rails are arranged in the lifting platform and the vacuum furnace. When working, the height of the lifting platform and the position of the moving mechanism are adjusted to make the slide rails on the lifting platform dock with the slide rails in the vacuum furnace. The material is supported by a supporting plate to slide along the slide rail so that the material enters the vacuum furnace from the lifting platform to complete the loading and moves from the vacuum furnace to the lifting platform to complete the unloading. This loading and unloading device has the following defects: 1. There are slide rails in the furnace. The high temperature environment during operation can easily shorten the service life of the slide rails, and high requirements are placed on the high temperature resistance and other performance of the slide rails, and the replacement and maintenance costs are increased; 2. The sliding movement of the support plate along the slide rail not only limits the loading capacity, resulting in the inability to increase production capacity, but also makes the support plate extremely easy to wear, resulting in a reduced service life and even damage to the support plate. In addition, when the weight of the supported material is heavy, it is difficult to push and the driving force is difficult to control, resulting in poor stability.

[0003] In view of the above problems, patent document CN 219301311 U discloses a loading and unloading device for a vacuum furnace, including a material receiving platform, a translation component and a lifting platform, wherein the material receiving platform is provided with a material supporting and placing component for lifting and placing materials. It has the advantages of long service life, low equipment manufacturing, operation and maintenance costs, and high working stability. In the device, a side baffle is provided on the supporting plate of the material supporting and placing component, and a lifting matching groove is provided on the side baffle. A lifting swing arm is hingedly installed on the material receiving platform corresponding to each lifting matching groove. When the lifting drive mechanism drives the supporting plate to move horizontally, the lifting swing arm is located in the corresponding lifting matching groove and cooperates with the lifting matching groove to lift and place the supporting plate when the material receiving platform moves horizontally. The lifting and placing of the supporting plate is achieved by the action of the lifting swing arm and the side baffle.

[0004] However, in order to ensure the smooth operation of the support plate, the above device has high requirements on the manufacturing and installation accuracy of the lifting swing arm and the side baffle. In addition, in the process of the lifting swing arm lifting the support plate, the required thrust is large, the parts are subjected to large force, and are easily damaged. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a loading and unloading device for a vacuum furnace, the parts manufacturing accuracy and installation accuracy of the lifting and guiding mechanism of which are lower, the service life is longer, and the safety and stability are better.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A loading and unloading device for a vacuum furnace comprises a translation assembly and a lifting platform mounted on the translation assembly in a height-adjustable manner, wherein a fixed track and a movable track are mounted on the lifting platform in a manner that the movable track can reciprocate along the extension direction of the fixed track and can enter and exit the vacuum furnace through reciprocating motion; further comprising a material receiving platform, wherein the material receiving platform is provided with a walking wheel assembly that can travel along the fixed track and the movable track and a material holding and placing assembly for lifting and placing materials; the material holding and placing assembly comprises a supporting plate, a lifting driving mechanism for driving the supporting plate to horizontally displace along its length direction, and a lifting guide mechanism that can lift the supporting plate under the drive of the lifting driving mechanism, wherein the lifting guide mechanism comprises a wedge-shaped block, wherein the wedge-shaped blocks are arranged at intervals on both sides of the bottom of the supporting plate along the length direction of the supporting plate, and the wedge-shaped blocks are fixedly connected to the supporting plate; the lifting guide mechanism also comprises a lifting and operating bearing that can be slidably connected with the inclined surface of the wedge-shaped block to lift the supporting plate when the supporting plate is horizontally displaced along its length direction by the lifting driving mechanism.

[0008] As a further improvement of the above solution:

[0009] The upper surface of the wedge block is provided with a connection hole for bolt connection with the supporting plate and a positioning hole for setting a positioning pin, and the positioning pin is interference fit with the positioning hole.

[0010] At least two connection holes are provided, and the connection holes and the positioning holes are distributed alternately with each other.

[0011] A support block for fixing the lifting bearing is arranged at the bottom of the support plate, the wedge block is arranged at a distance from the support block, and a ball is arranged on the side of the wedge block facing the support block.

[0012] A ball mounting hole is provided on the side of the wedge block, and the ball is movably connected in the ball mounting hole. The ball includes a protruding portion protruding toward the direction of the support block. A fixing screw for axially limiting the ball is provided in the mounting hole, and a self-lubricating ring movably connected to the ball is provided between the fixing screw and the ball.

[0013] The material supporting and releasing assembly also includes a dustproof baffle, which is arranged on the side of the wedge block facing away from the supporting block along the length direction of the supporting plate. The wedge block is also provided with a baffle mounting hole, and the dustproof baffle is bolted to the wedge block through the baffle mounting hole.

[0014] The angle between the inclined surface of the wedge block and the supporting plate is set to α, α=30°.

[0015] The distance between the inclined surface of the wedge block and the peripheral surface of the lifting bearing is set to b, and an adjustment pad for adjusting the distance b is provided between the top of the wedge block and the supporting plate, and the adjustment pad is detachably connected to the wedge block.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model proposes a loading and unloading device for a vacuum furnace, in which a support plate is horizontally displaced under the action of a lifting drive mechanism. In the process of the horizontal displacement of the support plate, under the action of the lifting guide mechanism, the support plate is gradually lifted by the pushing force from the vertical lifting and running bearing. The lifting and guiding mechanism of the utility model has lower structural manufacturing accuracy requirements and reduced installation and assembly difficulty. In addition, during operation, the interaction force between the lifting and running bearing and the wedge block is smaller, which makes the service life of the device longer and the safety and stability better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a top view of a loading and unloading device for a vacuum furnace in an embodiment.

[0019] Figure 2 1 is a schematic side view of the structure used for the vacuum furnace in the embodiment.

[0020] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0021] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0022] Figure 5 yes Figure 3 Cross-sectional view of the middle wedge block along the CC direction.

[0023] Figure 6 is a top view of the wedge block.

[0024] Figure 7 yes Figure 1 A partial enlarged view of point D in the middle.

[0025] The symbols in the figure represent:

[0026] 1. Material-carrying platform; 2. Material-carrying assembly; 21. Support plate; 22. Support block; 23. Dust baffle; 3. Lifting drive mechanism; 4. Lifting guide mechanism; 41. Wedge block; 411. Inclined surface; 412. Connecting hole; 413. Positioning hole; 414. Baffle mounting hole; 42. Lifting and lowering bearing; 43. Adjusting pad; 5. Positioning pin; 6. Ball; 61. Protruding part; 62. Set screw; 63. Self-lubricating ring; 7. Translation assembly; 8. Lifting platform; 9. Travel wheel assembly. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Figures 1 to 7The utility model shows a loading and unloading device for a vacuum furnace, comprising a translation assembly 7 and a lifting platform 8 mounted on the translation assembly 7 in a height-adjustable manner, the lifting platform 8 is mounted with a fixed track and a movable track, the movable track is mounted on the lifting platform 8 in a manner that it can reciprocate along the extension direction of the fixed track and can enter and exit the vacuum furnace through reciprocating motion; it also includes a material receiving platform 1, the material receiving platform 1 is provided with a walking wheel assembly 9 that can travel along the fixed track and the movable track, and a material supporting and placing assembly 2 for lifting and placing materials; the material supporting and placing assembly 2 includes a supporting plate 21, A lifting drive mechanism 3 is used to drive the support plate 21 to horizontally displace along its length direction, and a lifting guide mechanism 4 can lift the support plate 21 under the drive of the lifting drive mechanism 3, the lifting guide mechanism 4 includes a wedge block 41, the wedge blocks 41 are arranged at intervals on both sides of the bottom of the support plate 21 along the length direction of the support plate 21, and the wedge blocks 41 are fixedly connected to the support plate 21; the lifting guide mechanism 4 also includes a lifting and lowering bearing 42 that can be slidably connected with the inclined surface 411 of the wedge block 41 to lift the support plate 21 when the support plate 21 is horizontally displaced along its length direction by the lifting drive mechanism 3. Specifically, when loading materials, the translation component 7 and the lifting component can be used to adjust the position and height of the lifting platform 8, so that the movable track is aligned with the furnace mouth of the vacuum furnace so that the vacuum furnace can be entered and exited from the furnace mouth, and then the movable track is entered into the vacuum furnace, and the lifting platform 8 is controlled to descend by the lifting component, so that the movable track is supported on the bottom surface of the vacuum furnace, and then the material receiving platform 1 is moved along the fixed track and the movable track to enter the vacuum furnace, and then the material supporting and placing component 2 in the material holding state is switched to the material placing state, and the held material is placed on the material receiving table preset in the furnace, and finally the material holding platform 1 is moved along the fixed track and the movable track to exit the vacuum furnace, and the movable track is exited from the vacuum furnace, thus completing the loading of materials into the vacuum furnace. When unloading materials, the material support assembly 2 is switched to the material release state, and the material receiving platform 1 is moved along the fixed track and the movable track into the vacuum furnace according to the above steps of loading materials, until the material support assembly 2 moves to the bottom of the material, and then the material support assembly 2 is switched to the material lifting state to lift the material, and then the material support platform 1 is moved along the fixed track and the movable track to exit the vacuum furnace, and the movable track is exited from the vacuum furnace, that is, the material is unloaded from the vacuum furnace. Due to the combination of the fixed track and the movable track, the movable track can enter and exit the vacuum furnace, and there is no need to fix the track in the vacuum furnace, which can avoid the high temperature environment during operation causing the track to shorten its service life, and the high temperature resistance performance requirements of the track are low, which can reduce the equipment manufacturing, operation and maintenance costs. At the same time, the height of the lifting platform 8 is adjustable, which is convenient for the movable track to smoothly enter and exit the vacuum furnace at a height higher than the bottom surface of the vacuum furnace. After entering the vacuum furnace, the movable track can be lowered and carried on the bottom surface of the vacuum furnace, avoiding the movable track from being suspended in the air and ensuring the carrying capacity of the movable track.By using the material support assembly 2 to lift and put down the material, it can be achieved that after the material is loaded, no parts of the entire loading and unloading device remain in the vacuum furnace, avoiding the influence of the high temperature environment when the vacuum furnace is working, and extending the service life of the entire loading and unloading device. In this structure, the support plate 21 is horizontally displaced under the action of the lifting drive mechanism 3. In the process of the horizontal displacement of the support plate 21, under the action of the lifting guide mechanism 4, the support plate 21 is gradually lifted under the action of the wedge block 41 by the pushing force from the lifting and running bearing 42. Compared with the lifting swing arm structure of CN219301311U, the lifting guide mechanism 4 of the utility model has lower structural manufacturing accuracy requirements and reduced installation and assembly difficulty. In addition, during operation, the interaction force between the lifting and running bearing 42 and the wedge block 41 is smaller, which makes the device have a longer service life and better safety and stability.

[0029] In this embodiment, the upper surface of the wedge block 41 is provided with a connection hole 412 for bolt connection with the support plate 21 and a positioning hole 413 for setting the positioning pin 5, and the positioning pin 5 is interference fit with the positioning hole 413. In this structure, the positioning accuracy of the connection hole 412 and the bolt is relatively limited. By setting the positioning pin 5 and the positioning hole 413 to have an interference fit, the installation positioning accuracy of the wedge block 41 is ensured, and the structural stability of the device is further improved.

[0030] In this embodiment, at least two connection holes 412 are provided, and the connection holes 412 and the positioning holes 413 are arranged alternately. With this structure, the connection stability between the wedge block 41 and the supporting plate 21 is ensured.

[0031] In this embodiment, a support block 22 for fixing the lifting operation bearing 42 is provided at the bottom of the support plate 21, the wedge block 41 is spaced apart from the support block 22, and a ball 6 is provided on the side of the wedge block 41 facing the support block 22. In this structure, the friction between the wedge block 41 and the support block 22 is reduced by providing the ball 6, thereby improving the structural stability of the device.

[0032] In this embodiment, a ball mounting hole 415 is provided on the side of the wedge block 41, and the ball 6 is movably connected in the ball mounting hole 415. The ball 6 includes a protruding portion 61 that protrudes toward the direction of the support block 22. A fixing screw 62 for axially limiting the ball 6 is provided in the mounting hole, and a self-lubricating ring 63 movably connected to the ball 6 is provided between the fixing screw 62 and the ball 6.

[0033] In this embodiment, the material supporting assembly 2 also includes a dust baffle 23, which is arranged on the side of the wedge block 41 facing away from the supporting block 22 along the length direction of the supporting plate 21. The wedge block 41 is also provided with a baffle mounting hole 414, and the dust baffle 23 is bolted to the wedge block 41 through the baffle mounting hole 414.

[0034] In this embodiment, the angle between the inclined surface 411 of the wedge block 41 and the support plate 21 is set to α, α=30°. In this structure, the driving force required by the jack is calculated according to the weight of the equipment and materials. The smaller the angle α, the smaller the thrust required for the lifting drive mechanism 3 and the larger the required stroke. Setting α to 30° makes the structural layout reasonable and improves the energy conversion efficiency of the lifting drive mechanism 3.

[0035] In this embodiment, an adjustment pad 43 is provided between the upper surface of the wedge block 41 and the supporting plate 21, and the adjustment pad 43 is detachably connected to the wedge block 41. In this structure, when the supporting plate 21 is in the lowered position, the distance between the inclined surface 411 of the wedge block 41 and the peripheral surface of the lifting operation bearing 42 is set to b. By providing the adjustment pad 43, the processing accuracy of the wedge block 41 can be further reduced, and the installation position of the wedge block 41 can be adjusted by preparing adjustment pads 43 of various thicknesses.

[0036] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A loading and unloading device for a vacuum furnace, comprising a translation assembly (7) and a lifting platform (8) mounted on the translation assembly (7) in a height-adjustable manner, the lifting platform (8) being mounted with a fixed track and a movable track, the movable track being mounted on the lifting platform in a manner capable of reciprocating along an extension direction of the fixed track and capable of entering and exiting the vacuum furnace through reciprocating motion; further comprising a material receiving platform (1), the material receiving platform (1) being provided with a running wheel assembly (9) capable of traveling along the fixed track and the movable track and a material supporting assembly (2) for lifting and lowering materials; the material supporting assembly (2) comprising a supporting plate (21), a lifting drive mechanism (3) for driving the supporting plate (21) to horizontally displace along its length direction, and a lifting guide mechanism (4) capable of lifting the supporting plate (21) under the drive of the lifting drive mechanism (3), characterized in that: The lifting guide mechanism (4) comprises a wedge block (41), wherein the wedge blocks (41) are arranged at intervals on both sides of the bottom of the supporting plate (21) along the length direction of the supporting plate (21), and the wedge blocks (41) are fixedly connected to the supporting plate (21); the lifting guide mechanism (4) further comprises a lifting operation bearing (42) which can be slidably connected with the inclined surface (411) of the wedge block (41) to lift the supporting plate (21) when the supporting plate (21) is horizontally displaced along its length direction by the lifting drive mechanism (3).

2. The loading and unloading device for a vacuum furnace according to claim 1, characterized in that: The upper surface of the wedge block (41) is provided with a connection hole (412) for bolt connection with the support plate (21) and a positioning hole (413) for arranging a positioning pin (5), and the positioning pin (5) is interference fit with the positioning hole (413).

3. The loading and unloading device for a vacuum furnace according to claim 2, characterized in that: At least two connection holes (412) are provided, and the connection holes (412) and the positioning holes (413) are arranged in an alternating manner.

4. The loading and unloading device for a vacuum furnace according to claim 3, characterized in that: The material receiving platform (1) is provided with a support block (22) for fixing the lifting bearing (42); the support block (22) is arranged below the supporting plate (21); the wedge block (41) is spaced apart from the support block (22); and a ball (6) is arranged on the side of the wedge block (41) facing the support block (22).

5. The loading and unloading device for a vacuum furnace according to claim 4, characterized in that: A ball mounting hole (415) is provided on the side of the wedge block (41), the ball (6) is movably connected in the ball mounting hole (415), the ball (6) comprises a protruding portion (61) protruding in the direction of the support block (22), a set screw (62) for axially limiting the ball (6) is provided in the mounting hole, and a self-lubricating ring (63) movably connected to the ball (6) is provided between the set screw (62) and the ball (6).

6. The loading and unloading device for a vacuum furnace according to claim 5, characterized in that: The material supporting and placing assembly (2) further comprises a dust baffle (23), wherein the dust baffle (23) is arranged on a side of the wedge block (41) facing away from the supporting block (22) along the length direction of the supporting plate (21), and the wedge block (41) is further provided with a baffle mounting hole (414), and the dust baffle (23) is bolted to the wedge block (41) via the baffle mounting hole (414).

7. The loading and unloading device for a vacuum furnace according to claim 1, characterized in that: The angle between the inclined surface (411) of the wedge block (41) and the supporting plate (21) is set to α, α=30°.

8. The loading and unloading device for a vacuum furnace according to claim 7, characterized in that: The distance between the inclined surface (411) of the wedge block (41) and the peripheral surface of the lifting and running bearing (42) is set to b, and an adjustment pad (43) for adjusting the size of the distance b is provided between the top of the wedge block (41) and the supporting plate (21), and the adjustment pad (43) is detachably connected to the wedge block (41).

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