Automatic baking tray device and embedded electric steam oven

Abstract

The present invention discloses an automatic baking tray device, comprising a slide rail, a baking tray arranged on the slide rail, and an automatic pushing mechanism for pushing the baking tray to move along the slide rail; the automatic pushing mechanism comprises a screw nut transmission mechanism and a motor driving the screw nut transmission mechanism to move, wherein one end of a transmission screw in the screw nut transmission mechanism is connected to an output shaft of the motor, and a nut of the screw nut transmission mechanism is connected to the baking tray. The rotation of the transmission screw causes the nut connected to the transmission screw to drive the baking tray to move along the slide rail, thereby realizing the push-pull process of the baking tray, avoiding the current situation that the baking trays of built-in electric steam ovens are all manually pushed and pulled, and in the process of pushing and pulling the baking tray, there is a risk of scalding the human body and sliding and tilting of the plate due to high humidity and heat steam. Compared with traditional racks and pneumatic telescopic structures, the present invention is both stable and reliable and has a simple structure. It has good sealing performance in a high humidity and heat environment and does not have the problem of oil pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and more specifically, to an automatic baking tray device and a built-in electric steam oven. Background Art

[0002] The oven is a traditional electric oven with a steam system added, which integrates the functions of baking and steaming. It has become a hot spot in the current research and manufacturing of kitchen appliances, and is also an important part of modern kitchen appliances, bringing a technological experience to smart family life. However, the baking trays of the current electric ovens or electric steam ovens, especially the built-in electric steam ovens, are all manually pushed and pulled, with a low degree of automation. In this way, when using the electric steam oven, firstly, after the food is steamed and baked, it is necessary to wear insulated gloves and reach into the box to manually pull out the baking tray. When pulling out the baking tray, the human body is placed close to the front of the electric steam oven, and the high-temperature steam is in danger of scalding the operator (such as the face). At the same time, the gloves touch the food, resulting in unhealthy and unhygienic problems; secondly, because the food or the plate in the baking tray is offset, the force is difficult to control when manually pushing and pulling the baking tray in the box, causing the plate to slide and collide with the baking tray (especially when the baking tray is just pushed in or pulled out), and the soup in the plate splashes out.

[0003] Based on the drawbacks of the baking tray of the above-mentioned electric steam oven during use, the relevant patent document CN101940437A uses a gear rack transmission to push and pull the baking tray. Since the gear rack transmission requires the use of lubricating oil, there is a problem of oil pollution. In addition, the gear rack transmission has the problem of unstable operation; CN206007021U uses a cylinder to push and pull the baking tray, and adopts a gas transmission, which has problems with air tightness and gas combustion. Summary of the invention

[0004] The present invention provides an automatic baking tray device to overcome the problem that the baking tray needs to be manually pulled out of the oven or pushed into the oven during use of the above-mentioned prior art electric oven, and the degree of automation is low.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic baking tray device, comprising a slide rail, a baking tray arranged on the slide rail, and an automatic pushing mechanism for pushing the baking tray to move along the slide rail; the automatic pushing mechanism comprises a screw-nut transmission mechanism and a motor driving the screw-nut transmission mechanism to move, wherein one end of the transmission screw in the screw-nut transmission mechanism is connected to the output shaft of the motor, and the nut of the screw-nut transmission mechanism is connected to the baking tray.

[0006] In this technical solution, the driving screw in the screw nut transmission mechanism rotates, prompting the nut connected to the driving screw to drive the baking tray to move along the slide rail, thereby realizing the push-pull process of the baking tray, avoiding the current built-in electric steam ovens that are all manually pushed and pulled. In the process of pushing and pulling the baking tray, the high-humidity and hot steam has the risk of scalding the human body and the plate sliding and tilting. Compared with the traditional rack and pneumatic telescopic structure, the present invention is both stable and reliable and has a simple structure. It has good sealing performance in a high-humidity and hot environment and does not have the problem of oil pollution.

[0007] Preferably, the automatic pushing mechanism further comprises a sleeve mechanism connected to the baking tray, and the screw nut transmission mechanism is sleeved on the sleeve mechanism and used for the sleeve mechanism to automatically extend and retract. In this technical solution, the screw nut transmission mechanism drives the sleeve mechanism to automatically extend and retract, and in the process of the sleeve mechanism automatically extending and retracting, the baking tray is pushed and pulled.

[0008] Preferably, the sleeve mechanism comprises a sleeve base, a female sleeve arranged on the sleeve base, and a plurality of stages of telescopic units arranged in the female sleeve and nested in sequence with each other, and the ends of the telescopic units are connected to the baking tray.

[0009] Preferably, the telescopic unit is a three-stage telescopic unit, which includes a primary unit nested in the female sleeve, a secondary unit nested in the primary unit, and a tertiary unit nested in the secondary unit, wherein the transmission screw is installed in the female sleeve, the primary unit includes a primary sleeve nested in the female sleeve, a primary nut fixedly connected to one end of the primary sleeve close to the motor, and a primary sleeve boss provided on the other end of the primary sleeve; the secondary unit includes a secondary sleeve nested in the primary sleeve, a secondary nut fixedly connected to one end of the secondary sleeve close to the motor, and a secondary sleeve boss provided on the other end of the secondary sleeve; the tertiary unit includes a tertiary rod nested in the secondary sleeve, and a tertiary nut fixedly connected to one end of the tertiary rod close to the motor; the primary nut, the secondary nut and the tertiary nut are respectively threadedly connected to the transmission screw, and the tertiary rod is connected to the baking tray; a female sleeve boss is provided on the end of the female sleeve away from the motor. In the present technical solution, the primary sleeve is nested in the female sleeve, and the primary sleeve is contracted during the sliding process of the primary sleeve in the female sleeve through the connection between the primary nut and the transmission screw; the secondary sleeve is nested in the secondary sleeve, and the secondary sleeve is contracted during the sliding process of the secondary sleeve in the primary sleeve through the connection between the secondary nut and the transmission screw; the tertiary rod is nested in the secondary sleeve, and the tertiary rod is contracted during the sliding process of the tertiary rod in the secondary sleeve through the connection between the tertiary nut and the transmission screw. It should be noted that a small clearance fit is formed between the primary nut and the female sleeve, a small clearance fit is formed between the secondary nut and the primary sleeve, and a small clearance fit is formed between the tertiary nut and the secondary sleeve.

[0010] Preferably, it also includes a sliding connection mechanism for connecting the baking tray and the automatic pushing mechanism. In this technical solution, the sliding connection mechanism can quickly connect the baking tray and the automatic pushing mechanism together, so as to realize the rapid installation and removal of the baking tray. The slider connection mechanism includes a connector, a push rod hole provided in the connector, a first latch hole intersecting with the push rod hole, and a sliding member movably connected to the connector, the sliding member is used to connect the baking tray and the connector; a latch is installed in the first latch hole, and the latch is used to connect the second latch hole provided at one end of the three-stage rod away from the three-stage nut. In this technical solution, the three-stage rod is installed in the push rod hole, the latch is installed in the first latch hole and the second latch hole, and the latch connects the three-stage rod and the connector together. The sliding member connects the baking tray and the connector together, and in the process of the three-stage rod pushing the connector to move, the sliding member drives the baking tray to move along the slide rail.

[0011] Preferably, the sliding member includes a sliding quick-connect hole provided on the connector and intersecting with the first latch hole, a T-shaped sliding block, and a spring provided in the first latch hole; a vertical sliding block on the T-shaped sliding block abuts against the inner wall of the baking tray, and another vertical sliding block on the T-shaped sliding block extends into the sliding quick-connect hole and is threadedly connected to the latch; one end of the spring is fixedly connected to the latch, and the other end of the spring is fixedly connected to a spring seat provided in the first latch hole. In the present technical solution, a vertical sliding block on the T-shaped sliding block abuts against the inner wall of the baking tray, and another vertical sliding block on the T-shaped sliding block is threadedly connected to the latch. It should be noted that a through-hole structure should be provided on the inner wall of the baking tray, so that a vertical sliding block on the T-shaped sliding block is threadedly connected to the latch after passing through the through-hole structure on the baking tray and the sliding quick-connect hole. The T-shaped sliding block quickly connects the baking tray and the connector together, and also facilitates the rapid disassembly of the three. In addition, the spring can properly adjust the position of the latch so that the position of the connection between the latch and the T-shaped sliding block can be located at the sliding quick-connect hole.

[0012] Preferably, the connector is provided with a limit threaded hole cocentric with the first latch hole, a limit pin is threadedly connected in the limit threaded hole, and the limit pin abuts against the spring seat; counterweight blocks are provided on the baking tray and at both ends of the connector. In the present technical solution, adjusting the limit pin can adjust the elastic force of the spring, thereby adjusting the position of the latch in the first latch hole, so that the position where the latch is connected to the T-shaped sliding block is located at the sliding quick-connect hole. The counterweight block added to the baking tray can avoid the risk of the baking tray tilting downward when the baking tray is pushed and pulled to the extreme position, thereby making the entire baking tray pushing and pulling process stable and safe.

[0013] Preferably, the transmission screw comprises a bare rod portion without threads and a screw rod portion with threads, one end of the bare rod portion is fixedly connected to the motor output shaft outside the female sleeve; the length of the bare rod portion is greater than or equal to the sum of the widths of the primary nut and the secondary nut, and the length of the bare rod portion is less than the sum of the widths of the primary nut, the secondary nut, and the tertiary nut. In the present technical solution, the baking tray is located at the initial stage of the slide rail, that is, the baking tray does not slide on the slide rail, the primary nut, the secondary nut, and the tertiary nut are sequentially located on the transmission screw, and since the length of the bare rod portion in the female sleeve is greater than or equal to the sum of the widths of the primary nut and the secondary nut, and is less than the sum of the widths of the primary nut, the secondary nut, and the tertiary nut, at least a portion of the tertiary nut can be threadedly connected to the screw rod; the tertiary nut is driven along the screw rod portion under the action of the screw rod portion, and since the tertiary nut and the secondary sleeve are nested and connected and there is a small clearance fit between the tertiary nut and the secondary sleeve, the tertiary nut slides in the secondary sleeve under the action of the screw rod portion, and when the tertiary nut moves to the position of the secondary sleeve boss, Due to the obstruction of the secondary sleeve boss, under the action of the screw rod part, the third-level nut drives the secondary nut fixedly connected to the secondary sleeve to move upward, so that the secondary nut is separated from the light rod part. When the secondary nut and the screw rod part form a screw nut connection, the secondary nut moves in the primary sleeve under the action of the screw rod part. When the secondary nut moves to the position of the primary sleeve boss, due to the obstruction of the primary sleeve boss on the secondary nut, under the action of the screw rod part, the secondary nut drives the primary sleeve to move. During the movement of the primary sleeve, the primary nut is separated from the light rod part. When the primary nut moves to the position of the female sleeve boss, the entire screw nut transmission mechanism reaches the maximum length extension.

[0014] Preferably, the length of the transmission screw is equal to the length of the mother sleeve, and the length of the transmission screw is greater than the length of the primary sleeve, the secondary sleeve, and the tertiary rod. In this technical solution, the length of the transmission screw in the mother sleeve is consistent with the length of the mother sleeve, and the length of the transmission screw is greater than the length of the primary sleeve, the secondary sleeve, and the tertiary rod, so that the primary sleeve, the secondary sleeve, and the tertiary rod can be fully extended and retracted.

[0015] The present invention also provides a built-in electric steam oven, comprising a box body and the automatic baking tray device described above, wherein the slide rail is arranged on the inner wall of the box body, and the automatic pushing mechanism is arranged on the rear side of the inner wall of the box body.

[0016] Compared with the prior art, the beneficial effects are:

[0017] (1) By utilizing the working principle of the screw nut, the sleeve structure can be retracted in three levels, thereby making full use of the longitudinal length space of the electric steam oven and realizing the function of automatically pushing and pulling the baking tray along the inner wall track of the steam oven.

[0018] (2) Since the automatic push-pull baking tray device is arranged behind the inner wall of the steam oven, and the female sleeve is relatively fixed to the inner wall, it is more stable and reliable than the traditional gear rack and air-powered telescopic structure, and has a simple structure, and has good sealing performance in a high humidity and heat environment.

[0019] (3) By designing the connection structure between the baking tray and the three-stage sleeve, a convenient, fast and reliable connection can be achieved.

[0020] (4) The baking tray is provided with left and right counterweights to avoid the risk of the baking tray tilting downward when the baking tray is pushed or pulled to the extreme position, thereby making the entire baking tray pushing and pulling process stable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the automatic baking tray device of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the sliding connection mechanism and the automatic pushing mechanism in the present invention;

[0023] Figure 3 It is an axial cross-sectional view of the automatic pushing mechanism in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the sliding connection mechanism in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the sliding member in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the limit pin in the present invention. DETAILED DESCRIPTION

[0027] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0030] Example

[0031] like Figures 1 to 6 As shown, an automatic baking tray device comprises a slide rail 1, a baking tray 2 arranged on the slide rail 1, and an automatic pushing mechanism for pushing the baking tray 2 to move along the slide rail 1; the automatic pushing mechanism 4 comprises a screw nut transmission mechanism 42 and a motor 43 for driving the screw nut transmission mechanism 42 to move, wherein one end of a driving screw 425 in the screw nut transmission mechanism 42 is connected to the output shaft of the motor 43, and the nut of the screw nut transmission mechanism 42 is connected to the baking tray 2. By rotating the driving screw 425 in the screw nut transmission mechanism 42, the nut connected to the driving screw 425 can be driven to drive the baking tray 2 to move along the slide rail 1, thereby realizing the function of automatically pushing and pulling the baking tray 2 in the oven, avoiding the current built-in electric steam ovens that are all manually pushed and pulled. In the process of pushing and pulling the baking tray 2, the high-humidity hot steam has the risk of scalding the human body and the plate sliding and tilting. It should be noted that the automatic pushing mechanism 4 is arranged on the rear shell 6; the nut of the screw nut transmission mechanism is 4222.

[0032] The automatic pushing mechanism 4 also includes a sleeve mechanism connected to the baking tray 2, and the screw nut transmission mechanism 42 is sleeved on the sleeve mechanism and used for the sleeve mechanism to automatically extend and retract. The screw nut transmission mechanism 42 drives the sleeve mechanism to automatically extend and retract, and in the process of the sleeve mechanism automatically extending and retracting, the baking tray 2 is pushed and pulled.

[0033] In addition, the sleeve mechanism includes a sleeve base 41, a female sleeve 421 arranged on the sleeve base 41, and a plurality of telescopic units arranged in the female sleeve 421 and nested in sequence with each other, and the end of the telescopic unit is connected to the baking tray 2.

[0034] The telescopic unit is a three-stage telescopic unit, which includes a primary unit 422 nested in the female sleeve 421, a secondary unit 423 nested in the primary unit 422, and a tertiary unit 424 nested in the secondary unit 423, wherein the transmission screw 425 is installed in the female sleeve 421, the primary unit 422 includes a primary sleeve 4221 nested in the female sleeve 421, a primary nut 4222 fixedly connected to one end of the primary sleeve 4221 close to the motor 43, and a primary sleeve boss 4223 provided on the other end of the primary sleeve 4221, at this time, the primary nut 4222 is the nut 4222 of the screw nut transmission mechanism 42; the secondary unit 423 includes a primary sleeve 4221 nested in the female sleeve 421, a primary nut 4222 fixedly connected to the first end of the primary sleeve 4221 close to the motor 43, and a primary sleeve boss 4223 provided on the other end of the primary sleeve 4221. At this time, the primary nut 4222 is the nut 4222 of the screw nut transmission mechanism 42; the secondary unit 423 includes a primary sleeve 4221 nested in the female sleeve 421, and a primary nut 4222 fixedly connected to the first end of the primary sleeve 4221 close to the motor 43, and a primary sleeve boss 4223 provided on the other end of the primary sleeve 4221. It includes a secondary sleeve 4231 nested in the primary sleeve 4221, a secondary nut 4232 fixedly connected to one end of the secondary sleeve 4231 close to the motor 43, and a secondary sleeve boss 4233 provided on the other end of the secondary sleeve 4231; the tertiary unit 424 includes a tertiary rod 4241 nested in the secondary sleeve 4231, and a tertiary nut 4242 fixedly connected to one end of the tertiary rod 4241 close to the motor 43; the primary nut 4222, the secondary nut 4232 and the tertiary nut 4242 are respectively threadedly connected to the transmission screw 425, and the tertiary rod 4241 is connected to the baking tray 2; a female sleeve boss 4211 is provided on the end of the female sleeve 421 away from the motor 43. Under the action of the transmission screw 425, the primary unit 422 can slide in the female sleeve 421, thereby realizing the extension and retraction of the primary unit 422; under the action of the transmission screw 425, the secondary unit 423 can slide in the primary unit 422, thereby realizing the extension and retraction of the secondary unit 423; under the action of the transmission screw 425, the tertiary unit 424 can slide in the secondary unit 423, thereby realizing the extension and retraction of the tertiary unit 424. It should be noted that after the primary unit 422, the secondary unit 423 and the tertiary rod 424 are fully unfolded, the center of gravity of the entire screw nut transmission mechanism 42 moves forward, and the sleeve base 41 is preferably set at the end of the female sleeve 421 away from the motor 43. The primary sleeve 4221 is nested in the female sleeve 421, and is connected to the transmission screw 425 through the primary nut 4222. When the primary sleeve 4221 slides in the female sleeve 421, the primary sleeve 4221 is contracted; the secondary sleeve 4231 is nested in the secondary sleeve 4221, and is connected to the transmission screw 425 through the secondary nut 4232. When the secondary sleeve 4231 slides in the primary sleeve 4221, the secondary sleeve 4231 is contracted; the tertiary rod 4241 is nested in the secondary sleeve 4231, and is connected to the transmission screw 425 through the tertiary nut 4232. When the tertiary rod 4241 slides in the secondary sleeve 4231, the tertiary rod 4241 is contracted.It should be noted that a small clearance fit is formed between the primary nut 4222 and the female sleeve 421, a small clearance fit is formed between the secondary nut 4232 and the primary sleeve 4221, and a small clearance fit is formed between the tertiary nut 4242 and the secondary sleeve 4231. The primary nut 4222, the secondary nut 4232 and the tertiary nut 4242 are circular in shape, and the primary nut 4222, the secondary nut 4232 and the tertiary nut 4242 are respectively connected with the transmission screw 425 to form a screw nut. It should be noted that a female sleeve cover 4212 with a through hole is provided at one end of the female sleeve 421 close to the motor 43, and the transmission screw 425 is fixedly connected to the motor output shaft after extending from the female sleeve cover 4212. In addition, the telescopic unit is not limited to a three-stage telescopic unit of the primary unit 422, the secondary unit 423 and the tertiary unit 424, but can also be a primary telescopic unit, a secondary telescopic unit, or a four-stage or even more-stage telescopic unit. When the telescopic unit adopts a primary telescopic unit, the primary telescopic unit is a three-stage rod 4241, which is directly nested in the female sleeve 421, and the three-stage nut 4242 on one end of the three-stage rod 4241 is connected to the transmission screw 425, and the other end of the three-stage rod 4241 is connected to the baking tray 2. Under the action of the transmission screw 425, the three-stage nut 4242 drives the three-stage rod 4241 to achieve telescoping, thereby achieving the pushing and pulling of the baking tray. When the telescopic unit adopts a secondary telescopic unit, the secondary telescopic unit only includes a secondary unit and a tertiary unit that are nested with each other, and the secondary unit is nested in the female sleeve, one end of the tertiary unit is connected to the baking tray, and the structure of the secondary unit and the tertiary unit is similar to the structure of the secondary unit and the tertiary unit in the three-stage telescopic unit.

[0035] In addition, it also includes a sliding connection mechanism 3 for connecting the baking tray 2 and the automatic pushing mechanism. The sliding connection mechanism 3 can quickly connect the baking tray 2 and the automatic pushing mechanism together, so as to realize the rapid installation and removal of the baking tray 2.

[0036] The slider connection mechanism 3 includes a connection body 31, a push rod hole 32 provided in the connection body 31, a first latch hole 33 intersecting the push rod hole 32, and a sliding member 34 movably connected to the connection body 31, the sliding member 34 is used to connect the baking tray 2 and the connection body 31; a latch 35 is installed in the first latch hole 33, the latch 35 is used to connect the second latch hole 4243 provided at the end of the three-stage rod 4241 away from the three-stage nut 4242. The three-stage rod 4241 is installed in the push rod hole 32, the latch 35 is installed in the first latch hole 33 and the second latch hole 4243, and the latch 35 connects the three-stage rod 4241 and the connection body 31 together. The sliding member 34 connects the baking tray 2 and the connection body 31 together, and when the three-stage rod 4241 pushes the connection body 31 to move, the sliding member 34 drives the baking tray 2 to move along the slide rail 1. It should be noted that the first latch hole 33 and the second latch hole 4243 are elliptical holes, and their minor diameters are matched with the latch 35 with a small clearance; the first latch hole 33 and the second latch hole 4243 can also be other types of holes. In addition, the diameter of the push rod hole 32 is slightly larger than the rod diameter of the third-stage rod 4241, and the diameter of the first latch hole 33 and the second latch hole 4243 is slightly larger than the diameter of the latch 35.

[0037] In addition, the sliding member 34 includes a sliding quick-connect hole 341 provided on the connecting body 31 and intersecting with the first latch hole 33, a T-shaped sliding block 342 and a spring 343 provided in the first latch hole 33; a vertical sliding block 3421 on the T-shaped sliding block 342 abuts against the inner wall of the baking tray 2, and another vertical sliding block 3421 on the T-shaped sliding block 3422 extends into the sliding quick-connect hole 341 and is threadedly connected to the latch 35; one end of the spring 343 is fixedly connected to the latch 35, and the other end of the spring 343 is fixedly connected to the spring seat 36 provided in the first latch hole 33. A vertical sliding block 3421 on the T-shaped sliding block 342 abuts against the inner wall of the baking tray 2, and another vertical sliding block 3421 on the T-shaped sliding block 342 is threadedly connected with the latch 35. It should be noted that the inner wall of the baking tray 2 should be provided with a through-hole structure, so that a vertical sliding block 3421 on the T-shaped sliding block 342 passes through the through-hole structure on the baking tray 2 and the sliding quick-connect hole 341 and is threadedly connected with the latch 35. The T-shaped sliding block 342 quickly connects the baking tray 2 and the connector 31 together, and also facilitates the rapid disassembly of the three. In addition, the spring 343 can appropriately adjust the position of the latch 35, so that the position of the connection between the latch 35 and the T-shaped sliding block 342 can be located at the sliding quick-connect hole 341. It should be noted that the T-shaped sliding block 342 includes two vertical sliding blocks 3421 that are perpendicular to each other, wherein the vertical sliding block 3421 that is threadedly connected to the pin 35 should be a rod-shaped structure, and a threaded structure is provided at its end, and a threaded connection is formed by the threaded structure and the threaded hole structure provided on the pin 35, thereby facilitating the T-shaped sliding block 342 to quickly fix the baking tray and the connector 31 together.

[0038] Among them, the connecting body 31 is provided with a limiting threaded hole 37 which is cocentric with the first latch hole 33, and a limiting pin 38 is threadedly connected in the limiting threaded hole 37, and the limiting pin 38 abuts against the spring seat 36; and a counterweight 5 is provided on the baking tray 2 and at both ends of the connecting body 31. The elastic force of the spring 36 can be adjusted by adjusting the limiting pin 38, so that the position of the latch 35 in the first latch hole 33 can be adjusted, so that the position where the latch 35 is connected with the T-shaped sliding block 342 is located at the sliding quick-connect hole 341. The counterweight 5 added to the baking tray 2 can avoid the risk of the baking tray 2 tilting downward when the baking tray 2 is pushed and pulled to the extreme position, so that the entire baking tray pushing and pulling process is stable and safe. It should be noted that the limiting threaded hole 37 runs through one side of the connecting body 31, and the limiting pin 38 installed in the limiting threaded hole 37 adopts a hexagonal threaded pin, and the limiting threaded pin can be adjusted using a screwdriver.

[0039] In addition, the transmission screw 425 includes a bare rod portion 4251 without threads and a screw rod portion 4252 with threads, and one end of the bare rod portion 4251 is fixedly connected to the motor output shaft outside the female sleeve 421; the length of the bare rod portion 4251 is greater than or equal to the sum of the widths of the first-level nut 4222 and the second-level nut 4232, and the length of the bare rod portion 4251 located in the female sleeve 421 is less than the sum of the widths of the first-level nut 4222, the second-level nut 4232, and the third-level nut 4242. The baking tray 2 is located at the initial stage of the slide rail 1, that is, the baking tray 2 does not slide on the slide rail 1, and the first-level nut 4222, the second-level nut 4232 and the third-level nut 4242 are sequentially located on the transmission screw 425. Since the length of the light rod portion 4251 in the female sleeve 421 is greater than or equal to the sum of the widths of the first-level nut 4222 and the second-level nut 4232, and less than the sum of the widths of the first-level nut 4222, the second-level nut 4232 and the third-level nut 4242, the third-level nut 4242 can be tightened. At least a portion of 242 is threadedly connected to the screw portion 4252; the third-level nut 4242 is driven along the screw portion 4252 under the action of the screw portion 4252. Since the third-level nut 4242 is nested with the secondary sleeve 4231, the third-level nut 4242 slides in the secondary sleeve 4231 under the action of the screw portion 4252. When the third-level nut 4242 moves to the position of the secondary sleeve boss 4233, due to the obstruction of the secondary sleeve boss 4233, Under the action of the screw rod portion 4252, the third-level nut 4242 drives the second-level nut 4232 fixedly connected to the second-level sleeve 4231 to move upward, so that the second-level nut 4232 is separated from the light rod portion 4251. When the second-level nut 4232 forms a screw rod and nut connection with the screw rod portion 4252, the second-level nut 4232 moves in the first-level sleeve 4221 under the action of the screw rod portion 4252. When the second-level nut 4232 moves to a When the first-stage sleeve boss 4223 is in the position, due to the obstruction of the first-stage sleeve boss 4223 on the second-stage nut 4232, under the action of the screw rod part 4252, the second-stage nut 4232 drives the first-stage sleeve 4221 to move, and during the movement of the first-stage sleeve 4221, the first-stage nut 4222 is driven to detach from the light rod part 4252; when the first-stage nut 4222 moves to the position of the female sleeve boss 4211, the entire screw rod nut transmission mechanism 42 reaches the maximum length extension. During the whole process, the third-stage nut 4242 always drives the third-stage rod 4241 connected thereto to move together, thereby pushing the sliding connection mechanism 3 connected to the third-stage rod 4241 and the baking tray 2 to move, so that the baking tray 2 slides out of the oven along the slide rail 1.

[0040] The length of the transmission screw 425 is equal to the length of the female sleeve 421, and the length of the transmission screw 425 is greater than the length of the primary sleeve 4221, the secondary sleeve 4231, and the tertiary rod 4241. The length of the transmission screw 425 in the female sleeve 421 is consistent with the length of the female sleeve 421, and the length of the transmission screw 425 is greater than the length of the primary sleeve 4221, the secondary sleeve 4231, and the tertiary rod 4241, so that the primary sleeve 4221, the secondary sleeve 4231, and the tertiary rod 4241 can be completely retracted in the female sleeve 421.

[0041] Embodiment 2:

[0042] A built-in electric steam oven comprises a box body and the above-mentioned automatic baking tray device, wherein a slide rail 1 is arranged on the inner wall of the box body, and an automatic pushing mechanism 4 is arranged on the rear side of the inner wall of the box body.

[0043] Working principle:

[0044] When it is necessary to take food off the baking tray 2, the baking tray 2 is located at the initial stage of the slide rail 1, that is, the baking tray 2 does not slide on the slide rail 1, and the primary nut 4222, the secondary nut 4232 and the tertiary nut 4242 are sequentially located on the transmission screw 425. Since the length of the bare rod portion 4251 in the female sleeve 421 is greater than or equal to the sum of the widths of the primary nut 4222 and the secondary nut 4232, and less than the sum of the widths of the primary nut 4222, the secondary nut 4232 and the tertiary nut 4242, at least a portion of the tertiary nut 4242 can be threadedly connected to the screw portion 4252; The third-level nut 4242 is driven along the screw rod portion 4252 under the action of the screw rod portion 4252. Since the third-level nut 4242 and the second-level sleeve 4231 are nested and connected and there is a small gap between the third-level nut 4242 and the second-level sleeve 4231, the third-level nut 4242 slides in the second-level sleeve 4231 under the action of the screw rod portion 4252. When the third-level nut 4242 moves to the position of the second-level sleeve boss 4233, due to the obstruction of the second-level sleeve boss 4233, under the action of the screw rod portion 4252, the third-level nut 4242 drives the second-level sleeve 4231 The second-level nut 4232 that is fixedly connected moves, so that the second-level nut 4232 is connected to the screw rod part 4252 after being separated from the light rod part 4251, and the second-level nut 4232 and the third-level nut 4242 move along the screw rod part 4252. When the third-level nut 4242 is separated from the screw rod part 4252, the second-level nut 4232 continues to move under the action of the screw rod part 4252. When the second-level nut 4232 moves to the position of the first-level sleeve boss 4223, due to the obstruction of the first-level sleeve boss 4223 on the second-level nut 4232, under the action of the screw rod part 4252 The secondary nut 4232 drives the primary sleeve 4221 to move. During the movement of the primary sleeve 4221, the primary nut 4222 is driven to detach from the light rod part 4251 and connect with the screw rod part 4252; the secondary nut 4222 moves on the screw rod part 4252 together with the primary nut 4222. When the secondary nut 4232 detaches from the screw rod part 4252, the primary nut 4222 continues to move along the screw rod part 4252; when the primary nut 4222 moves to the position of the female sleeve boss 4211, the entire screw rod part nut transmission mechanism 42 reaches the maximum length extension.

[0045] When it is necessary to push the baking tray into the oven, the screw part 4252 rotates, first driving the first-level nut 4222 to be retracted onto the screw part 4252. During the retraction process, the first-level nut 4222 drives the second-level nut 4232 to be connected with the screw part 4252. The second-level nut 4232 is retracted onto the screw part 4252 under the action of the screw part 4252. During the retraction process, the second-level nut 4252 drives the third-level nut 4242 to be connected with the screw part 4252. The third-level nut 4242 is retracted onto the screw part 4252 under the action of the screw part 4252. The third-level nut 4242 forms a certain extrusion pressure on the second-level nut 4232 and the first-level nut 4222, forcing the second-level nut 4232 and the first-level nut 4222 to move onto the bare rod part 4251, thereby realizing that the third-level rod 4241, the second-level sleeve 4231 and the first-level sleeve 4221 are all stored in the female sleeve 421. During the contraction of the third-stage rod 4241 , the baking tray 2 connected to the sliding quick-connect structure 3 is always driven to be stored in the oven along the slide rail 1 .

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic baking tray device, characterized in that: The invention comprises a slide rail (1), a baking tray (2) arranged on the slide rail (1), and an automatic pushing mechanism (4) for pushing the baking tray (2) to move along the slide rail (1); the automatic pushing mechanism (4) comprises a screw nut transmission mechanism (42) and a motor (43) for driving the screw nut transmission mechanism (42) to move, wherein one end of a driving screw (425) in the screw nut transmission mechanism (42) is connected to an output shaft of the motor (43), and a nut of the screw nut transmission mechanism (42) is connected to the baking tray (2); the baking tray A slider connection mechanism (3) is also arranged between the baking tray (2) and the automatic pushing mechanism (4); the slider connection mechanism (3) comprises a connecting body (31), a push rod hole (32) arranged in the connecting body (31), a first latch hole (33) intersecting the push rod hole (32), and a sliding member (34) movably connected to the connecting body (31), the sliding member (34) being used to connect the baking tray (2) and the connecting body (31); a latch (35) is installed in the first latch hole (33); the sliding member (34) is used to connect the baking tray (2) and the connecting body (31); 4) comprises a sliding quick-connect hole (341) provided on the connecting body (31) and intersecting with the first latch hole (33), a T-shaped sliding block (342) and a spring (343) provided in the first latch hole (33); a vertical sliding block (3421) on the T-shaped sliding block (342) abuts against the inner wall of the baking tray (2), and another vertical sliding block (3421) of the T-shaped sliding block (342) extends into the sliding quick-connect hole (341) and is threadedly connected to the latch (35); the spring ( One end of the spring (343) is fixedly connected to the latch pin (35), and the other end of the spring (343) is fixedly connected to a spring seat (36) provided in the first latch pin hole (33); a limiting threaded hole (37) cocentric with the first latch pin hole (33) is provided on the connecting body (31), a limiting pin (38) is threadedly connected in the limiting threaded hole (37), and the limiting pin (38) is in contact with the spring seat (36); counterweight blocks (5) are provided on the baking tray (2) and at both ends of the connecting body (31).

2. The automatic baking tray device according to claim 1, characterized in that: The automatic pushing mechanism also includes a sleeve mechanism connected to the baking tray (2), and the screw nut transmission mechanism (42) is sleeved on the sleeve mechanism and is used for the automatic extension and retraction of the sleeve mechanism.

3. The automatic baking tray device according to claim 2, characterized in that: The sleeve mechanism comprises a sleeve base (41), a female sleeve (421) arranged on the sleeve base (41), and a plurality of stages of telescopic units arranged in the female sleeve (421) and nested in sequence with each other, wherein the ends of the telescopic units are connected to the baking tray (2).

4. The automatic baking tray device according to claim 3, characterized in that: The telescopic unit is a three-stage telescopic unit, which includes a primary unit (422) nested in the female sleeve (421), a secondary unit (423) nested in the primary unit (422), and a tertiary unit (424) nested in the secondary unit (423), wherein a transmission screw (425) is installed in the female sleeve (421), the primary unit (422) includes a primary sleeve (4221) nested in the female sleeve (421), a primary nut (4222) fixedly connected to one end of the primary sleeve (4221) close to the motor (43), and a primary sleeve boss (4223) provided on the other end of the primary sleeve (4221); the secondary unit (423) includes a secondary sleeve (424) nested in the primary sleeve (4221), and a tertiary unit (424) nested in the secondary unit (423). 231), a secondary nut (4232) fixedly connected to one end of the secondary sleeve (4231) close to the motor (43), and a secondary sleeve boss (4233) provided on the other end of the secondary sleeve (4231); the tertiary unit (424) comprises a tertiary rod (4241) nested in the secondary sleeve (4231), and a tertiary nut (4242) fixedly connected to one end of the tertiary rod (4241) close to the motor (43); the primary nut (4222), the secondary nut (4232) and the tertiary nut (4242) are respectively threadedly connected to the transmission screw (425), and the tertiary rod (4241) is connected to the baking tray (2); a female sleeve boss (4211) is provided on one end of the female sleeve (421) away from the motor (43).

5. The automatic baking tray device according to claim 4, characterized in that: The latch pin (35) is used to connect to a second latch pin hole (4243) provided at one end of the third-level rod (4241) away from the third-level nut (4242).

6. The automatic baking tray device according to claim 4, characterized in that: The transmission screw (425) includes a bare rod portion (4251) without threads and a screw rod portion (4252) with threads, one end of the bare rod portion (4251) is fixedly connected to the motor output shaft outside the female sleeve (421); the length of the bare rod portion (4251) is greater than or equal to the sum of the widths of the first-level nut (4222) and the second-level nut (4232), and the length of the bare rod portion (4251) is less than the sum of the widths of the first-level nut (4222), the second-level nut (4232), and the third-level nut (4242).

7. The automatic baking tray device according to claim 4, characterized in that: The length of the transmission screw (425) is equal to the length of the female sleeve (421), and the length of the transmission screw (425) is greater than the lengths of the primary sleeve (4221), the secondary sleeve (4231), and the tertiary rod (4241).

8. A built-in electric steam oven, comprising a box, characterized in that: It also comprises the automatic baking tray device according to any one of claims 1 to 7, wherein the slide rail (1) is arranged on the inner wall of the box body, and the automatic pushing mechanism (4) is arranged on the rear side of the inner wall of the box body.

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