Retractable packing door

Abstract

The invention relates to a retractable packing door which comprises a door body, a plurality of claw rods and a retractable transmission mechanism are arranged in the door body, the claw rods are annularly distributed in the door body, and the retractable transmission mechanism drives the claw rods to radially extend out of or retract into the door body and then slide into or out of a lock seat. The sealing ring locking device is applied to a testing machine, the multiple claw rods are annularly distributed in the door body, the claw rods are driven by the scaling type transmission mechanism, the claw rods are screwed into the lock holes firstly and then longitudinally move to be in extrusion collision with the lock holes, the sealing ring is tightly pressed, and therefore the sealing ring can be prevented from being damaged, and the service life of the sealing ring is prolonged. Therefore, the pressure difference between the retractable packing door and the lock seat is uniformly distributed, the possibility that parts are damaged due to the pressure difference is reduced, and meanwhile, the sealing performance of the box door is improved, so that the accuracy of an experiment result is ensured.

Description

Technical Field

[0001] This invention relates to the field of retractable clamping doors, and more particularly to a retractable clamping door. Background Technology

[0002] In experiments or tests requiring strict control of atmosphere, pressure, temperature, and other conditions, a sealed experimental environment ensures that the experiment is unaffected by the external environment, thereby guaranteeing the accuracy of the experimental results. For example, CN116148114A discloses a thermal shock testing machine. The thermal shock test described in this publication is an essential testing device in the metal, plastic, rubber, and electronic materials industries, used to test material structures or composite materials. During the thermal shock test, a sealed environment is required. This publication employs a rotating swing linkage with a sealing door, which is rotatably connected to an insulation plate via the rotating swing linkage. The sealing door seals the outer test chamber, and a locking mechanism locks the sealing door to prevent relative rotation between the sealing door and the insulation plate.

[0003] However, in the above technical solutions, simply rotating the swing linkage to seal the outer test chamber with the sealing door may result in insufficient or excessive pressure differential. Furthermore, with prolonged use, the sealing door may be damaged at the edges due to pressure differential issues, leading to poor sealing performance and affecting the experimental results. Summary of the Invention

[0004] To address the above problems, the present invention provides a retractable clamping door.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The present invention relates to a retractable locking door, comprising a door body, wherein a plurality of claw rods and a retractable transmission mechanism are provided within the door body, the plurality of claw rods being distributed in a ring within the door body, and the retractable transmission mechanism driving the claw rods to extend radially or retract into the door body and slide into or out of the lock seat, and driving the claw rods to move longitudinally toward or away from the lock seat.

[0006] Preferably, the door body includes an outer cover and an inner cover, and the telescopic transmission mechanism includes a spindle, a toothed sleeve, a swing linkage, and a limiting member. The spindle is disposed on the inner cover, and a toothed sleeve is threaded onto the spindle. Swing linkages in the horizontal direction are evenly distributed in a ring on the toothed sleeve. A claw rod is connected to the end of the swing linkage away from the toothed sleeve. Each claw rod is evenly distributed around the circumference of the spindle, and each claw rod can rotate around the swing linkage in the longitudinal direction. Limiting members are evenly distributed in a ring around the periphery of the inner cover, and each claw rod is installed in the limiting member.

[0007] Preferably, the scaling transmission mechanism is driven to rotate by a drive mechanism located inside the door body. The drive mechanism includes a motor, a drive wheel, and a driven wheel. The driven wheel is fixed to a spindle. The motor drives the drive wheel to rotate, and the drive wheel meshes with the driven wheel for transmission.

[0008] Preferably, the inner cover is circular or nearly circular in shape, with the periphery of the inner cover gradually concave towards the center to form an arc surface.

[0009] Preferably, the inner cover has an outwardly extending assembly platform around its periphery, and the limiting members are evenly distributed along the assembly platform with the mandrel as the center.

[0010] Preferably, the limiting member has a limiting opening that extends through both ends of the limiting member, and the claw rod passes through the limiting opening.

[0011] Preferably, a limiting plate is also provided on the side of the limiting port facing the center of the inner cover.

[0012] Preferably, the dental brace is provided with a plurality of pins, the swing linkage is rotatably connected to the dental brace through the pins, and the swing linkage is connected to the claw rod through the shaft.

[0013] Preferably, the movement trajectory of the scaling transmission mechanism driving the claw bar to first extend radially and then move longitudinally towards the lock seat includes a first stroke, a second stroke, and a third stroke. In the first stroke, the scaling transmission mechanism causes the claw bar to rotate relative to the spindle by rotating the spindle, and the claw bar remains in a closed state. In the second stroke, the spindle drives the claw bar to extend radially relative to the spindle, and the claw bar remains in an open state. In the third stroke, the scaling transmission mechanism converts the rotational movement of the claw bar into a longitudinal translational movement of each claw bar relative to the spindle.

[0014] The beneficial effects of this invention are as follows: When applied to a testing machine, several claw bars are distributed in a ring within the door body. Driven by a scaling transmission mechanism, the claw bars first rotate into the lock hole and then move longitudinally to compress and collide with the lock hole, thus pressing the sealing ring tightly. This results in a uniform distribution of the pressure difference between the scaling-type clamping door and the lock seat, reducing the possibility of damage to components due to pressure difference, while improving the sealing performance of the door, thereby ensuring the accuracy of the experimental results. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the retractable clamping door of the present invention.

[0016] Figure 2 This is a top view of the scalable clamping door of the present invention.

[0017] Figure 3 This is a cross-sectional view of the first state of the scalable clamping door of the present invention.

[0018] Figure 4 This is an overall structural diagram of the scalable clamping door without a drive wheel of the present invention.

[0019] Figure 5 This is a top view of the scalable clamping door without a drive wheel according to the present invention.

[0020] Figure 6 This is an overall structural diagram of the second state of the scaling-type clamping door of the present invention.

[0021] Figure 7 This is a top view of the second state of the scaling-type clamping door of the present invention.

[0022] Figure 8 This is a cross-sectional view of the second state of the scalable clamping door of the present invention.

[0023] Figure 9 This is an overall structural diagram of the third state of the scaling-type clamping door of the present invention.

[0024] Figure 10 This is a top view of the third state of the scaling-type clamping door of the present invention.

[0025] Figure 11 This is a cross-sectional view of the third state of the scalable clamping door of the present invention.

[0026] Figure Labels

[0027] 1. Inner cover; 11. Assembly table; 12. Arc surface; 2. Limiting component; 21. Limiting port; 22. Limiting plate; 3. Claw rod; 31. Swinging linkage; 4. Tooth sleeve; 41. Pin; 5. Mandrel; 6. Driving wheel; 7. Driven wheel; 8. Lock seat; 81. Lock hole; 82. Sealing ring. Detailed Implementation

[0028] Please see Figure 1-11 As shown, the present invention relates to a retractable locking door, comprising a door body, wherein a plurality of claw rods 3 and a retractable transmission mechanism are provided within the door body, the plurality of claw rods 3 being arranged in a ring within the door body, the retractable transmission mechanism driving the claw rods 3 to extend radially or retract into the door body and slide into or out of the lock seat 8, and driving the claw rods 3 to move longitudinally toward or away from the lock seat 8.

[0029] In this invention, the scaling transmission mechanism drives the claw 3 to slide into the lock hole 81, thereby locking the door. The scaling transmission mechanism then drives the claw 3 to retract inward, causing the claw 3 to exit the lock hole 81 and unlocking the door. After the claw 3 slides into the lock hole 81, the scaling transmission mechanism drives the claw 3 to move longitudinally towards the lock seat 8, causing the door body to press against the sealing ring 82. The scaling transmission mechanism then drives the claw 3 to move longitudinally away from the lock seat 8, causing the door body to disengage from the sealing ring 82.

[0030] In this invention, the door body includes an outer cover (not shown in the figure) and an inner cover 1. The scaling transmission mechanism includes a spindle 5, a toothed sleeve 4, a claw rod 3, a swinging connecting rod 31, and a limiting member 2. The spindle 5 is disposed on the inner cover 1. The toothed sleeve 4 is threadedly connected to the spindle 5. The swinging connecting rod 31 is evenly distributed in a ring in the horizontal direction on the toothed sleeve 4. The end of the swinging connecting rod 31 away from the toothed sleeve 4 is connected to the claw rod 3 through a shaft. The claw rod 3 is evenly distributed around the circumference of the spindle 5. The claw rod 3 can rotate around the swinging connecting rod 31 in the longitudinal direction. The inner cover 1 is provided with an assembly platform. The periphery of the assembly platform is evenly distributed in a ring with limiting members 2. The claw rod 3 is installed in the limiting member 2.

[0031] The scaling transmission mechanism is driven to rotate by a drive mechanism located inside the door body. The drive mechanism includes a motor, a driving wheel 6, and a driven wheel 7. The driven wheel 7 is fixed to the spindle 5. The motor drives the driving wheel 6 to rotate, and the driving wheel 6 meshes with the driven wheel 7. The spindle 5 is fixed to the driven wheel 7 and rotates with it. The toothed rod 4 swings horizontally at a certain angle with the spindle 5, causing the pawl 3 to swing around the spindle 5. After each pawl 3 reaches or moves away from the limiting member 2, each pawl 3 can swing relative to the spindle 5. The claw lever 3 extends or retracts radially to engage with the lock seat 8, thereby closing the clamping door. At this point, the diameter of the inscribed circle of the claw lever 3 changes from being equal to the diameter of the inner cover 1 to being equal to the diameter of the inner cover 1. After the swing linkage 31 is limited by the limiting member 2 and cannot swing, the toothed sleeve 4 is restricted from rotating. The rotational movement of the toothed sleeve 4 is converted into a longitudinal translational movement of the toothed sleeve 4 relative to the spindle 5, causing the swing linkage 31 to drive the claw lever 3 to rotate longitudinally. This causes the claw lever 3 to press against the inner cover 1, pressing the inner cover 1 against the sealing ring 82. When the user needs to open the clamping door, after the claw lever 3 has a certain displacement relative to the inner cover 1, the inner cover 1 first disengages from the sealing ring 82, and then the claw lever 3 disengages from the lock seat 8, thus opening the clamping door.

[0032] The rotational trajectory of the claw 3 during the opening process driven by the scaling transmission mechanism includes a first stroke, a second stroke, and a third stroke. In the first stroke, the scaling transmission mechanism rotates the claw 3 by rotating the spindle 5, and the claw 3 remains in a closed state. In the second stroke, the scaling transmission mechanism drives the claw 3 to open, and the claw 3 remains in an open state. In the third stroke, the scaling transmission mechanism converts the rotational movement of the claw 3 into a longitudinal translational movement of each claw 3 relative to the spindle 5.

[0033] Furthermore, the inner cover 1 is generally circular or nearly circular, with its periphery gradually concave towards the center to form an arc surface 12. An assembly platform 11 extends outward from the periphery of the inner cover 1. The mandrel 5 is located at the center of the inner cover 1 and has threads. The toothed sleeve 4 is movably mounted on the mandrel 5. Several limiting members 2 are evenly distributed along the assembly platform 11 with the mandrel 5 as the center.

[0034] Specifically, the limiting member 2 has a limiting opening 21 that extends through both ends of the limiting member 2. In this embodiment, the overall shape of the limiting opening 21 is slightly larger than the cross-sectional shape of the claw rod 3, thereby limiting the swing range of the claw rod 3 after it passes through the limiting opening 21. In addition, in this embodiment, a limiting plate 22 is provided on the side of the limiting opening 21 facing the center of the inner cover 1. The limiting plate 22 is used to limit the swing position of the claw rod 3.

[0035] In this embodiment, the dental brace 4 is provided with several pins 41. The tail of the claw rod 3 is connected to the pins 41 through a swing link 31. After the claw rod 3 is connected to the swing link 31, the claw rod 3 can swing up and down. After the swing link 31 is connected to the pins 41, the swing link 31 will drive the claw rod 3 to swing left and right. The head of the claw rod 3 passes through the limiting member 2.

[0036] More specifically, when the retractable clamping door of the present invention is switched on and off with the lock seat 8, it has three variable states: the first state is the open state, in which the toothed sleeve 4 is tightly attached to the driven wheel 7, and the claw rod 3 and the toothed sleeve 4 are at a certain angle, with the claw rod 3 inclinedly connected to the toothed sleeve 4. The head of the claw rod 3 passes through and slightly protrudes from the limiting member 2, but does not enter the lock hole 81 of the lock seat 8. At this time, a sealing ring 82 is provided between the outer wall of the inner cover 1 and the lock seat 8 (e.g., Figure 3 (As shown).

[0037] The second transition state is the closing process. During this state, the driving wheel 6 is rotated by the motor or manually. The driving wheel 6 drives the driven wheel 7 to rotate, which in turn drives the spindle 5 to rotate. Because the toothed sleeve 4 is in close contact with the driven wheel 7 in the first state, friction is generated when the driven wheel 7 rotates, causing the toothed sleeve 4 to rotate along with it. The claw bar 3 swings along with the movement of the toothed sleeve 4 until it touches the limit plate 22, at which point the toothed sleeve 4 can no longer rotate. At this point, the claw bar 3 is vertically connected to the toothed sleeve 4, extends out of the limit opening 21, and enters the lock hole 81.

[0038] The third state is the closed state. When the second state is completed, the driven wheel 7 continues to rotate, driving the spindle 5 to rotate. The claw bar 3 cannot continue to rotate because it is limited by the limiting plate 22. Under the action of the spindle 5 rotation, the tooth sleeve 4 moves axially towards the spindle 5. The claw bar 3, along with the tooth sleeve 4, squeezes and collides with the lock hole 81, thereby pressing the sealing ring 82 tightly (e.g., Figure 9 As shown), at this time, the retractable clamping door is locked to the lock seat 8 of the box door.

[0039] In this invention, the plurality of claw bars 3 are evenly distributed on the inner cover 1. Through the rotational movement of the toothed sleeve 4, the claw bars 3 simultaneously squeeze and collide with the lock hole 81, and at the same time press the sealing ring 82, thereby making the pressure difference between the retractable clamping door and the lock seat 8 evenly distributed, reducing the possibility of damage to the components due to pressure difference, and improving the sealing performance of the door, thus ensuring the accuracy of the experimental results.

[0040] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A retractable clamping door, comprising a door body, wherein the door body contains a plurality of claw bars and a retractable transmission mechanism, the plurality of claw bars being arranged in a ring within the door body, characterized in that: The scaling transmission mechanism can extend radially or retract into the door body and slide into or out of the lock seat, and the driving claw can move longitudinally toward or away from the lock seat.

2. A retractable clamping door according to claim 1, characterized in that: The door body includes an outer cover and an inner cover. The telescopic transmission mechanism includes a spindle, a toothed sleeve, a swing linkage, and a limiting member. The spindle is located on the inner cover, and a toothed sleeve is threaded onto the spindle. Swing linkages are distributed in a horizontal direction at equal intervals in a ring on the toothed sleeve. A claw rod is connected to the end of the swing linkage away from the toothed sleeve. Each claw rod is evenly distributed around the circumference of the spindle, and each claw rod can rotate around the swing linkage in the longitudinal direction. Limiting members are distributed in a ring at equal intervals around the periphery of the inner cover, and each claw rod is installed in the limiting member.

3. A retractable clamping door according to claim 1, characterized in that: The scaling transmission mechanism is driven to rotate by a drive mechanism located inside the door body. The drive mechanism includes a motor, a drive wheel, and a driven wheel. The driven wheel is fixed to a spindle. The motor drives the drive wheel to rotate, and the drive wheel meshes with the driven wheel for transmission.

4. A retractable clamping door according to claim 2, characterized in that: The inner cover is circular or nearly circular in shape, with its periphery gradually concave towards the center to form an arc surface.

5. A retractable clamping door according to claim 2, characterized in that: The inner cover has an outwardly extending assembly platform around its perimeter, and the limiting members are evenly distributed along the assembly platform with the mandrel as the center.

6. A retractable clamping door according to claim 1, characterized in that: The limiting member has a limiting opening that extends through both ends of the limiting member, and the claw rod passes through the limiting opening.

7. A retractable clamping door according to claim 6, characterized in that: A limiting plate is also provided on the side of the limiting port facing the center of the inner cover.

8. A retractable clamping door according to claim 2, characterized in that: The dental brace is provided with several pins, and the swing linkage is rotatably connected to the dental brace through the pins. The swing linkage is connected to the claw rod through the shaft.

9. A retractable clamping door according to claim 1, characterized in that: The movement trajectory of the scaling transmission mechanism driving the claw bar to first extend radially and then move longitudinally toward the lock seat includes a first stroke, a second stroke, and a third stroke. In the first stroke, the scaling transmission mechanism causes the claw bar to rotate relative to the spindle by rotating the spindle, and the claw bar remains in a closed state. In the second stroke, the spindle drives the claw bar to extend radially relative to the spindle, and the claw bar remains in an open state. In the third stroke, the scaling transmission mechanism converts the rotational movement of the claw bar into a longitudinal translational movement of each claw bar relative to the spindle.

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