A box door closing and opening structure

Abstract

The application relates to a box door opening and closing structure and relates to the technical field of box door opening and closing. In order to solve the problem that the opening and closing angles of the existing closing structure are deviated, the box door opening and closing structure comprises a push rod connecting shaft connected with a push rod motor and a push rod motor output end, one side of the push rod connecting shaft is provided with a shaft connecting seat, a waist-shaped hole is formed in the front end of the push rod connecting shaft, two connecting lugs are arranged on the top of the shaft connecting seat, a connecting piece is arranged between the push rod connecting shaft and the shaft connecting seat, the connecting piece sequentially penetrates through one connecting lug, the waist-shaped hole and the other connecting lug, the front end of the push rod connecting shaft is hingedly arranged with the shaft connecting seat, and a rotating shaft for opening and closing the box door is fixedly arranged on the shaft connecting seat. The application has the effects of guaranteeing opening and closing precision and improving operation reliability.

Description

Technical Field

[0001] This application relates to the field of cabinet door opening and closing technology, and in particular to a cabinet door opening and closing structure. Background Technology

[0002] As a core component in industrial equipment, logistics warehousing, and household appliances, the performance of cabinet door opening and closing devices directly affects the sealing performance, ease of operation, and service life of the cabinet. Traditional cabinet door opening and closing solutions mostly rely on manual hinges, hydraulic support rods, or simple electric push rods, which have problems such as low control precision, large angle deviation, and poor environmental adaptability. With the development of automation technology, push rod motors have gradually become the mainstream drive method for electric opening and closing of cabinet doors due to their advantages such as simple structure, flexible control, and adjustable thrust.

[0003] In related technologies, when the existing push rod motor directly drives the rotating shaft, the rigid connection between the rotating shaft and the coupling is prone to slight slippage due to motor vibration and load changes, resulting in a deviation between the actual opening and closing angle of the door and the theoretical value. This deviation is exacerbated, especially in high-frequency opening and closing or heavy-load scenarios, affecting the door closing accuracy. Therefore, it needs to be improved. Utility Model Content

[0004] To address the issue of deviations in the opening and closing angles of existing closure structures, this application provides a door opening and closing structure.

[0005] The box door opening and closing structure provided in this application adopts the following technical solution: A door opening and closing structure includes a push rod motor and a push rod coupling connected to the output end of the push rod motor. A shaft connecting seat is provided on one side of the push rod coupling. An oblong hole is opened at the front end of the push rod coupling. Two connecting lugs are provided on the top of the shaft connecting seat. A connecting member is provided between the push rod coupling and the shaft connecting seat. The connecting member passes through one connecting lug, the oblong hole and the other connecting lug in sequence, so that the front end of the push rod coupling is hinged to the shaft connecting seat. A rotating shaft for opening and closing the door is fixedly provided on the shaft connecting seat.

[0006] Because in the existing structure, when the push rod motor directly drives the rotating shaft, the rigid connection between the rotating shaft and the coupling is prone to slight slippage due to motor vibration and load changes, resulting in a deviation between the actual opening and closing angle of the door and the theoretical value. This deviation is exacerbated, especially in high-frequency opening and closing or heavy-load scenarios, affecting the door closing accuracy. By adopting the above technical solution, including the push rod motor and the push rod coupling connected to the output end of the push rod motor, the rotating shaft is mounted on the shaft connecting seat, the top of the shaft connecting seat is formed with two connecting lugs, the front end of the push rod coupling is opened with a waist-shaped hole, and the push rod coupling and the shaft connecting seat are hinged through a connector. When the door is closed, the push rod motor is in the retracted state, and the rotating shaft drives the door to the fully open position through the shaft connecting seat. The oblong hole at the front end of the push rod coupling is hinged to the connecting lug of the shaft connecting seat, allowing for slight displacement. The system issues a closing command, the push rod motor starts and extends the push rod. The push rod pushes the shaft connecting seat through the push rod coupling, and the shaft connecting seat rotates around the center of the rotating shaft, causing the rotating shaft to rotate synchronously. The oblong hole on the push rod coupling absorbs the pulling force of the push rod motor, allowing the push rod coupling to move horizontally and preventing the rotating shaft from having an angular deviation due to rigid connection. The rotating shaft rotates to the preset angle of 90°, completing the precise closure. Through the design of the oblong hole, connecting lugs, and connectors, the oblong hole at the front end of the push rod coupling is hinged to the double lugs of the shaft connecting seat, forming a flexible connection node with the connectors. This enables non-rigid transmission between the push rod motor and the rotating shaft. The push rod motor drives the push rod coupling to move horizontally. The oblong hole structure can actively absorb the axial tension generated during motor operation, eliminating the risk of shaft angle deviation caused by rigid connection. At the same time, the shaft connecting seat rotates synchronously around the center of the rotating shaft and drives the door to close precisely to the 90° preset position, ensuring opening and closing accuracy and improving operational reliability.

[0007] Optionally, the shaft connector has a trapezoidal block structure, and the side of the shaft connector facing the push rod coupling is an inclined surface.

[0008] By adopting the above technical solution, the shaft connecting seat has a trapezoidal block structure, and the side of the shaft connecting seat facing the push rod coupling is an inclined surface; through the shape and other settings of the shaft connecting seat, the inclined surface forms a guiding effect, while the trapezoidal block structure enhances the connection rigidity between the shaft connecting seat and the rotating shaft.

[0009] Optionally, the shaft connecting seat has a mounting hole for the rotating shaft to pass through, the rotating shaft and the mounting hole are clearance fit, and the shaft connecting seat is provided with fastening bolts for fastening the rotating shaft.

[0010] By adopting the above technical solution, the mounting hole is opened on the shaft connector, the rotating shaft and the mounting hole of the shaft connector are clearance fit, and it is fixed by fastening bolts; by setting the mounting hole and fastening bolts, the clearance fit design of the mounting hole facilitates the installation of the shaft connector and the rotating shaft, eliminating the problem of difficult assembly of traditional interference fit. Combined with the fastening bolts, the rotating shaft and the shaft connector are fixed as a whole by pre-tightening force, solving the risk of loosening caused by clearance fit, and ensuring the synchronicity of the opening and closing of the door.

[0011] Optionally, the rotating shaft includes a first mating part, a second mating part, and a third mating part in sequence along its axial direction. The first mating part has a semi-circular cross-sectional shape and is used to mate with the mounting hole of the shaft connecting seat. The second mating part has a circular cross-sectional shape, and the third mating part has a semi-circular cross-sectional shape and is used to mate with the door. The plane of the first mating part and the plane of the third mating part form a preset angle.

[0012] By adopting the above technical solution, the rotating shaft includes a first mating part, a second mating part, and a third mating part in sequence along its axial direction. By setting the shape of the rotating shaft, the first mating part is clearance-fitted with the shaft connecting seat, reducing assembly difficulty. The circular cross section of the second mating part serves as the torque transmission hub, optimizing torque transmission efficiency. The third mating part is connected to the door through planar positioning to form a stable surface contact constraint, preventing the door from axially moving.

[0013] Optionally, the number of fastening bolts is multiple, and the multiple fastening bolts are arranged at intervals along the length of the shaft.

[0014] By adopting the above technical solution, the number of fastening bolts is multiple; by setting the number of fastening bolts, fixation is achieved through multi-point pressing, ensuring reliable fixation between the rotating shaft and the shaft connecting seat, while the spaced arrangement forms a uniform stress distribution, effectively eliminating the local stress concentration phenomenon that is prone to occur in traditional single bolt fixing.

[0015] Optionally, the center of the shaft connector is hollowed out to form a U-shaped receiving groove, and the push rod coupling passes through the inner wall of the U-shaped receiving groove.

[0016] By adopting the above technical solution, a U-shaped receiving groove is formed in the middle of the shaft connecting seat; by setting the U-shaped receiving groove, the two side walls of the U-shaped receiving groove form a constraint on the front end of the push rod coupling, which limits the radial displacement of the coupling during the extension and retraction of the push rod, and eliminates the swing gap that is easy to be generated by traditional open connection.

[0017] Optionally, the front end of the push rod coupling has two flat sides and a bottom surface, and its top surface is an arc surface.

[0018] By adopting the above technical solution, the front end of the push rod coupling has two flat sides and a bottom surface, while its top surface is an arc surface. By setting the shape of the front end of the push rod coupling, the problem of easy collision and friction between the push rod coupling and the inner wall of the U-shaped receiving groove of the shaft connection seat is effectively solved, ensuring smooth transmission.

[0019] Optionally, the push rod motor is configured with a fixed stroke to precisely control the rotation angle of the rotating shaft within a range of 90°.

[0020] By adopting the above technical solution, the push rod motor is set to a fixed stroke to precisely control the rotation angle of the shaft within a 90° range. This setting, by setting the push rod motor to a fixed stroke mode, achieves precise control of the shaft rotation angle, thereby improving the reliability of the door opening and closing.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the design of the waist-shaped hole, connecting lugs, and connecting parts, the waist-shaped hole at the front end of the push rod coupling is hinged to the double lugs of the shaft connecting seat, and combined with the connecting parts to form a flexible connection node, realizing non-rigid transmission between the push rod motor and the rotating shaft. The push rod motor drives the push rod coupling to move horizontally. The waist-shaped hole structure can actively absorb the axial tension generated during the operation of the motor, eliminating the risk of rotating shaft angle deviation caused by rigid connection. At the same time, the shaft connecting seat rotates synchronously around the center of the rotating shaft and drives the door to close precisely to the 90° preset position, ensuring opening and closing accuracy and improving operational reliability. 2. By setting the shape of the rotating shaft, the first mating part is clearance-fitted with the shaft connecting seat, reducing assembly difficulty. The circular cross section of the second mating part serves as the torque transmission hub, optimizing torque transmission efficiency. The third mating part connects with the door through planar positioning to form a stable surface contact constraint, preventing axial movement of the door. 3. By setting the U-shaped receiving groove, the two side walls of the U-shaped receiving groove form a constraint on the front end of the push rod coupling, which limits the radial displacement of the coupling during the extension and retraction of the push rod and eliminates the swing gap that is easy to be generated by traditional open connection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a door opening and closing structure in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram illustrating the structure of the shaft connecting seat and the push rod coupling in the embodiments of this application.

[0024] Figure 3 This is a top view of a door opening and closing structure in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram illustrating the movement of the door when it is opened and closed, as shown in the embodiments of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 2. Shaft connecting seat; 21. Connecting lug; 22. Mounting hole; 23. U-shaped receiving groove; 3. Push rod coupling; 31. Waist-shaped hole; 4. Connecting piece; 5. Fastening bolt. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] This application discloses a door opening and closing structure. (Refer to...) Figure 1 and Figure 2 The door opening and closing structure includes a push rod motor and a push rod coupling 3 connected to the output end of the push rod motor. The front end of the push rod coupling 3 has a through-hole 31. A shaft connecting seat 2 is installed on one side of the push rod coupling 3. A rotating shaft 1 for opening and closing the door is fixedly installed on the shaft connecting seat 2. In this embodiment, the push rod motor is set to a fixed stroke so that the rotation angle of the rotating shaft 1 is precisely controlled within the range of 90°.

[0029] Reference Figure 1 and Figure 2 The top of the shaft connecting seat 2 is formed with two connecting lugs 21. A connecting member 4 is provided between the push rod coupling 3 and the shaft connecting seat 2. The connecting member 4 passes through one connecting lug 21, the waist-shaped hole 31 and the other connecting lug 21 in sequence, so that the front end of the push rod coupling 3 is hinged to the shaft connecting seat 2. In this embodiment, the connecting member 4 can be a bolt, pin or other connecting component.

[0030] Reference Figure 1 and Figure 2 The shaft connecting seat 2 has a trapezoidal block structure, and the side of the shaft connecting seat 2 facing the push rod coupling 3 is an inclined surface; the inclined surface forms a guiding function, and at the same time the trapezoidal block structure enhances the connection rigidity between the shaft connecting seat 2 and the rotating shaft 1.

[0031] Reference Figure 1 and Figure 2 The shaft connecting seat 2 has a U-shaped receiving groove 23 formed by hollowing out the middle part. The push rod coupling 3 passes through the inner wall of the U-shaped receiving groove 23. In this embodiment, the front end of the push rod coupling 3 has two flat sides and the bottom surface, and the top surface is an arc surface. The two side walls of the U-shaped receiving groove 23 form a constraint on the front end of the push rod coupling 3, which restricts the radial displacement of the coupling during the extension and retraction of the push rod and eliminates the swing gap that is easy to be generated by traditional open connection.

[0032] Reference Figure 2 and Figure 3 The shaft connecting seat 2 has a mounting hole 22. In this embodiment, the mounting hole 22 is for the rotating shaft 1 to pass through. The rotating shaft 1 and the mounting hole 22 are in clearance fit. The shaft connecting seat 2 is equipped with a fastening bolt 5 for fastening the rotating shaft 1. The clearance fit design of the mounting hole 22 facilitates the installation of the shaft connecting seat 2 and the rotating shaft 1, eliminating the problem of difficult assembly of traditional interference fit. Combined with the fastening bolt 5, the rotating shaft 1 and the shaft connecting seat 2 are fixed as a whole by pre-tightening force, solving the risk of loosening caused by clearance fit and ensuring the synchronicity of the opening and closing of the door.

[0033] Reference Figure 2 and Figure 3The number of fastening bolts 5 is multiple, and the multiple fastening bolts 5 are arranged sequentially at intervals along the length of the rotating shaft 1. The fastening bolts 5 pass through the mounting hole 22 of the straight shaft connecting seat 2 and are fixed by multi-point pressing to ensure reliable fixation between the rotating shaft 1 and the shaft connecting seat 2. At the same time, the interval arrangement forms a uniform stress distribution, effectively eliminating the local stress concentration that is easy to occur in traditional single bolt fixing.

[0034] Reference Figure 3 and Figure 4 In this embodiment, the rotating shaft 1 includes a first mating part, a second mating part, and a third mating part along its axial direction. The first mating part has a semi-circular cross-sectional shape and is used to mate with the mounting hole 22 of the shaft connecting seat 2. The second mating part has a circular cross-sectional shape, and the third mating part has a semi-circular cross-sectional shape and is used to mate with the door. The plane of the first mating part and the plane of the third mating part form a preset angle. The first mating part is clearance-fitted with the shaft connecting seat 2 to reduce assembly difficulty. The circular cross-section of the second mating part serves as the torque transmission hub to optimize torque transmission efficiency. The connection between the third mating part and the door forms a stable surface contact constraint through planar positioning to prevent axial movement of the door.

[0035] The implementation principle of the cabinet door opening and closing structure in this application embodiment is as follows: When the cabinet door is closed, the push rod motor is in the retracted state, and the rotating shaft 1 drives the cabinet door to the fully open position through the shaft connecting seat 2. The waist-shaped hole 31 at the front end of the push rod coupling 3 is hinged to the connecting lug 21 of the shaft connecting seat 2, allowing slight displacement. The system issues a closing command, the push rod motor starts and extends the push rod, and the push rod pushes the shaft connecting seat 2 through the push rod coupling 3. The shaft connecting seat 2 rotates around the center of the rotating shaft 1, driving the rotating shaft 1 to rotate synchronously. The waist-shaped hole 31 on the push rod coupling 3 absorbs the pulling force of the push rod motor, so that the push rod coupling 3 moves horizontally, preventing the rotating shaft 1 from having an angular deviation due to rigid connection. The rotating shaft 1 rotates to a preset angle of 90°, completing precise closing. Through the design of the waist-shaped hole 31, connecting lug 21, and connecting piece 4, the waist-shaped hole 31 at the front end of the push rod coupling 3 is hinged to the double lug of the shaft connecting seat 2, and combined with the connecting piece 4 to form a flexible connection node, realizing non-rigid transmission between the push rod motor and the rotating shaft 1. The push rod motor drives the push rod coupling 3 to move horizontally. The structure of the waist-shaped hole 31 can actively absorb the axial tension generated during the operation of the motor, eliminating the risk of angular displacement of the rotating shaft 1 caused by rigid connection. At the same time, the shaft connecting seat 2 rotates synchronously around the center of the rotating shaft 1 and drives the box door to close precisely to the 90° preset position, ensuring opening and closing accuracy and improving operational reliability.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A door opening and closing structure, comprising a push rod motor and a push rod coupling connected to the output end of the push rod motor, characterized in that: A shaft connecting seat is provided on one side of the push rod coupling. A waist-shaped hole is opened at the front end of the push rod coupling. Two connecting lugs are provided on the top of the shaft connecting seat. A connecting member is provided between the push rod coupling and the shaft connecting seat. The connecting member passes through one connecting lug, the waist-shaped hole and the other connecting lug in sequence, so that the front end of the push rod coupling is hinged to the shaft connecting seat. A rotating shaft for opening and closing the box door is fixedly provided on the shaft connecting seat.

2. The door opening and closing structure according to claim 1, characterized in that: The shaft connector has a trapezoidal block structure, and the side of the shaft connector facing the push rod coupling is an inclined surface.

3. The door opening and closing structure according to claim 1, characterized in that: The shaft connector has a mounting hole for the rotating shaft to pass through, and the rotating shaft and the mounting hole are clearance fit. The shaft connector is provided with fastening bolts for fastening the rotating shaft.

4. The door opening and closing structure according to claim 3, characterized in that: The rotating shaft includes a first mating part, a second mating part, and a third mating part in sequence along its axial direction. The first mating part has a semi-circular cross-sectional shape and is used to mate with the mounting hole of the shaft connecting seat. The second mating part has a circular cross-sectional shape and the third mating part has a semi-circular cross-sectional shape and is used to mate with the door. The plane of the first mating part and the plane of the third mating part form a preset angle.

5. The door opening and closing structure according to claim 3, characterized in that: The number of fastening bolts is multiple, and the multiple fastening bolts are arranged at intervals along the length of the shaft.

6. The door opening and closing structure according to claim 1, characterized in that: The shaft connector has a U-shaped groove formed by hollowing out the middle part, and the push rod coupling passes through the inner wall of the U-shaped groove.

7. The door opening and closing structure according to claim 6, characterized in that: The front end of the push rod coupling has two flat sides and a bottom surface, while its top surface is an arc surface.

8. The door opening and closing structure according to claim 1, characterized in that: The push rod motor is set to a fixed stroke to precisely control the rotation angle of the rotating shaft within a range of 90°.

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