Bottom section door leaf of grain blocking door and resistance reducing mechanism of bottom section door leaf

Abstract

The utility model discloses a resistance reducing mechanism and a bottom section door leaf of a grain blocking door applying the resistance reducing mechanism, the bottom section door leaf comprises a first door leaf and a second door leaf, and further comprises a rolling device and a stress surface, the rolling device is arranged on the first door leaf, the stress surface is arranged on the second door leaf, and the rolling device is arranged on the second door leaf. And when the first door leaf and the second door leaf are in a closed state, the rolling device is in point contact or line contact with the stress surface. The resistance reducing mechanism is arranged between the two oppositely-opened bottom section door leaves, original surface contact is replaced with point contact or line contact, friction is replaced with rolling, friction resistance between the bottom section door leaves is greatly reduced, an operator can conveniently lift any bottom section door leaf independently, and meanwhile relevant components of the bottom section door leaves are protected against damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of grain storage facilities, especially to the mechanism that reduces friction resistance in the lifting process of grain depot door. BACKGROUND

[0002] The existing grain depot's grain blocking door usually adopts the inward pushing split type, and the two split grain blocking doors form a certain angle inward when closing, which is used to offset the outward thrust of the internal grain. The applicant's prior application discloses a grain blocking door with a bottom section door leaf (application number 202123456795.1), which can be opened upward relative to the upper section door leaf as needed. Since the left and right parts of the bottom section door leaf adopt the engagement cooperation mode at the abutment, the operator often lifts one of the bottom section door leaves alone in actual application, which leads to a large friction force between the left and right parts of the bottom section door leaf, wastes manpower and material resources, and easily causes damage to the bottom section door leaf and its sliding device due to uneven force. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a resistance reduction mechanism for the bottom section door leaf of the grain blocking door to reduce the problem of excessive friction resistance when the two bottom section door leaves move relative to each other in actual application.

[0004] The technical scheme adopted by the utility model to solve the above technical problem is:

[0005] A resistance reduction mechanism is provided, which is applied to the bottom section door leaf of the grain blocking door of a grain depot. The bottom section door leaf includes a first door leaf and a second door leaf, and includes a rolling device and a force receiving surface. The rolling device is arranged on the first door leaf, and the force receiving surface is arranged on the second door leaf. When the first door leaf and the second door leaf are in a closed state, the rolling device and the force receiving surface are in point contact or line contact.

[0006] Further, the first door leaf includes a first frame, and the first frame has a rolling mounting position for mounting the rolling device. The second door leaf includes a second frame, and the second frame has the force receiving surface.

[0007] Further, the rolling device is a ball bearing, which is mounted in the rolling mounting position through a ball bearing holder. The exposed part of the ball bearing is less than one half of the volume of the ball bearing.

[0008] Further, the ball bearing holder has a hole, and the diameter of the hole is less than the diameter of the ball bearing.

[0009] Further, the rolling mounting position or the ball bearing holder has a limiting surface.

[0010] Furthermore, the limiting surface is a limiting protrusion, which extends from the edge of the hole.

[0011] Furthermore, the rolling mounting position is a long groove extending along the lifting direction of the bottom section of the door leaf, and two or more rolling devices are arranged sequentially along the extension direction of the long groove.

[0012] Furthermore, the rolling mounting position is a short slot used only for installing a single rolling device, and two or more rolling mounting positions are arranged sequentially along the lifting direction of the bottom section door leaf.

[0013] The bottom section of a grain-blocking gate is also provided, including any of the above-mentioned drag-reducing mechanisms, wherein the number of the drag-reducing mechanisms is one or more.

[0014] Furthermore, the number of the drag-reducing mechanisms is two or more, and the two or more drag-reducing mechanisms are arranged in parallel or along the same straight line in the lifting direction of the bottom section door leaf.

[0015] Compared with the prior art, the advantages of this utility model are that a resistance-reducing mechanism is set between the two split bottom door panels, replacing the original surface contact with point contact or line contact, and replacing friction with rolling, which greatly reduces the frictional resistance between the bottom door panels, making it easier for the operator to raise or lower either bottom door panel individually, while protecting the relevant components of the bottom door panel from damage. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of this utility model showing the first door leaf rising independently when the grain-blocking door is in the closed state;

[0017] Figure 2 This is a top view of the closed structure of one embodiment of the bottom section door leaf of this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of part A;

[0019] Figure 4 for Figure 3 Enlarged view of part D;

[0020] Figure 5 This is a partially exploded structural diagram of one embodiment of the first door leaf of this utility model;

[0021] Figure 6 This is a partially exploded structural diagram of one embodiment of the second door leaf of this utility model;

[0022] Figure 7 This is a schematic diagram of another embodiment of the first door leaf of this utility model;

[0023] Figure 8 This is an enlarged top view of the closed structure of another embodiment of the bottom section door leaf of this utility model;

[0024] Figure 9A This is a schematic diagram of another embodiment of the ball bearing cage of this utility model;

[0025] Figure 9B for Figure 9A The right view.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 - First door leaf;

[0028] 200-First frame, 210-Rolling mounting position, 211-First slot, 212-Second slot, 213-Slot bottom, 215-Curved surface, 220 / 220'-Ball, 221-Exposed part, 222-Non-exposed part, 230-Ball holder, 231-Hole, 232-Limiting protrusion, 240-First bearing plate, 260-Roller, 261-Shaft;

[0029] 300 - Second door leaf;

[0030] 400-Second frame, 401-First sealing strip, 402-Second sealing strip, 410-First mounting groove, 411-First side wall, 412-Second side wall, 420-First sealing groove, 430-Second sealing groove, 440-Second load-bearing plate, 441-Outer surface;

[0031] 500-gap. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Reference Figures 1-9B The drag-reducing mechanism of this utility model is applied to the bottom section of the grain-blocking door in a grain depot. The bottom section includes a first door leaf 100 and a second door leaf 300, which are connected in the closed state by the drag-reducing mechanism. The first door leaf 100 and the second door leaf 300 can be respectively... Figure 2 The door opens in the direction indicated by arrows B and C. When closed, the first door leaf 100 and the second door leaf 300 are each connected to the main door leaf located above them in a liftable manner. For details of the connection, please refer to the patent announcement text with patent number 202123456795.1, which will not be repeated here.

[0034] The first door leaf 100 includes a first frame 200, and the second door leaf 300 includes a second frame 400. The first frame 200 and the second frame 400 abut against each other when in the closed state.

[0035] As shown in Figure 1 , when the first door leaf 100 and the second door leaf 300 are not synchronized in lifting, in order to reduce the resistance between the first frame 200 and the second frame 400, the first frame 200 and the second frame 400 are in point contact or line contact, and in a preferred embodiment, the first frame 200 and the second frame 400 are in multi-point contact or multi-line contact, multi means 2 or more contact positions. Specifically, the first frame 200 is provided with a rolling installation position 210, and a rolling device is installed in the rolling installation position 210; the second frame 400 has a stress surface at a position corresponding to the rolling device.

[0036] In an embodiment, as shown in Figures 1-5 , the rolling device is a ball 220, which is installed in the rolling installation position 210 through a ball holder 230, and the ball holder 230 has a hole 231 with a diameter smaller than that of the ball 220, allowing a part (i.e. the exposed part 221 of the ball 220) smaller than half of the ball 220 to be exposed from the hole 231 and ensuring that the ball 220 will not fall out of the ball holder 230 during rolling. The rolling installation position 210 has a first insertion slot 211 for installing the ball holder 230, and the ball holder 230 is inserted and fixed in the first insertion slot 211; in an embodiment, the ball holder 230 is a plate matched with the internal shape of the first insertion slot 211, and the holes 231 are distributed along the extension direction of the plate, which can be uniformly distributed or non-uniformly distributed, as shown in Figure 5 .

[0037] As shown in Figure 4 , Figure 5 , the rolling installation position 210 has a limiting surface at the opening, which is a curved surface 215 in an embodiment, and the curved surface 215 and the hole 231 together limit the ball 220 from escaping from the rolling installation position 210. The curved surface 215 can be a part of a cylindrical side surface or a part of a spherical surface, and the diameter of the curved surface 215 is slightly larger than that of the ball 220, which means that the ball 220 can freely roll (rotate) inside the curved surface 215 and will not escape from it. The curved surface 215 can increase the instantaneous contact points of the ball 220 when rolling in the rolling installation position 210, and compared with a flat surface, it can more stably keep the ball 220 in a narrow space. In addition, the curved surface 215 further reduces the volume of the exposed part 221 of the ball 220, thereby further reducing the risk of accidental falling of the ball 220, and at this time the curved surface 215 can be regarded as an outward extension of the hole 231. In an embodiment, as shown in Figure 4 .As shown, the curved surface 215 is 2, respectively symmetrically arranged on both sides of the exposed part 221 of the ball 220; in other embodiments, the curved surface 215 can be several unconnected partial spherical surfaces with the same spherical center. In another embodiment, the limiting surface can also be a plane, which forms an acute angle with the axis of the hole 231 and is in contact with the exposed part 221 of the ball 220. In an embodiment, the limiting surface is extended from the edge of the hole 231, for example, as shown in Figure 9A 、 Figure 9B the limiting convex edge 232 is extended outward from the edge of the hole 231 to both sides of the plane where the hole 231 is located, in an embodiment, the number of limiting convex edges 232 is 4, and two by two is symmetrically arranged on both sides of the plane where the hole 231 is located, and can also be uniformly distributed along the periphery of the hole 231, so that the ball 220 is more stably retained in the hole 231; in other embodiments, the number and distribution position of the limiting convex edge 232 can be adjusted as needed, and it can also be a continuous convex edge located at the edge of the hole 231. In another embodiment, the limiting surface is extended from the edge of the rolling installation site 210.

[0038] In order to make the non-exposed part 222 of the ball 220 (the part outside the exposed part 221 of the ball 220) stably roll inside the rolling installation site 210, the rolling installation site 210 has a second slot 212 for inserting and fixing the first stress plate 240, for example, a steel plate, when the ball 220 rolls, the first stress plate 240 keeps the volume of the exposed part 221 of the ball 220 unchanged together with the ball holder 230, so that the first door leaf 100 and the second door leaf 300 keep stable contact.

[0039] In another embodiment, as shown in Figure 7 、 Figure 8 the rolling device is a roller 260 (or a rolling shaft), the roller 260 is rotatably installed in the rolling installation site 210 through the rotating shaft 261, the roller 260 rolls back and forth along the lifting direction of the bottom section door leaf, and is in instantaneous line contact with the second frame 400, the extension direction of the contact line is perpendicular to the lifting direction of the bottom section door leaf.

[0040] In an embodiment, the rolling installation site 210 is a long slot extending along the lifting direction of the bottom section door leaf, and 2 or more rolling devices are arranged in sequence along the extension direction of the long slot. In a simple embodiment, the slot bottom 213 of the rolling installation site 210 serves as a stress part to bear the pressure from the rolling of the rolling device, so that the first stress plate 240 is omitted, but the rigidity requirement of the first frame 200 is higher at this time; in another embodiment, the rolling installation site 210 can be a short slot for installing a single rolling device, and 2 or more rolling installation sites 210 are arranged in sequence along the lifting direction of the bottom section door leaf.

[0041] In actual application, in order to improve the stability of the rolling device when rolling, in addition to the first stress plate 240, in one embodiment, the second frame 400 is provided with a second stress plate 440, such as a steel plate, so that the second frame 400 is not easy to deform when in contact with the rolling device, and the stability of the overall resistance reduction mechanism is improved. In other embodiments, the second stress plate 440 can also be made of other suitable rigid materials. In a more preferred embodiment, the second stress plate 440 is a 304 stainless steel plate.

[0042] In one embodiment, the first frame 200 is provided with one rolling installation position 210; in another embodiment, the first frame 200 is provided with two parallel rolling installation positions 210, and each rolling installation position 210 is provided with a rolling device, such as shown in Figures 1-3 and Figure 5 All rolling devices are in point contact or line contact with the second frame 400 in the closed state. The number of rolling devices determines the stability of the single bottom section door leaf when lifting, and if the number is too small, although the friction can be reduced, the stability is poor.

[0043] In another embodiment, the rolling device is provided on the second frame 400, and the corresponding stress surface is provided on the first frame 200; in some embodiments, the rolling device and the stress surface can be alternately and parallelly arranged on the first frame 200 and the second frame 400, for example, the first rolling device is arranged on the first frame 200, the second rolling device is arranged on the second frame 400, the first stress surface is arranged on the second frame 400 corresponding to the first rolling device, and the second stress surface is arranged on the first frame 200 corresponding to the second rolling device; in other embodiments, when two or more parallel rolling devices are arranged on the same frame (the first frame 200 or the second frame 400), two or more stress surfaces are arranged at the corresponding position of the other frame, or a joint stress surface shared by two rolling devices is arranged. Therefore, one or more resistance reduction mechanisms can be arranged between the first door leaf 100 and the second door leaf 300; when two or more resistance reduction mechanisms are arranged, the two or more resistance reduction mechanisms are arranged in parallel or along the same straight line in the lifting direction of the bottom section door leaf.

[0044] In one embodiment, the second frame 400 has a first mounting slot 410 for mounting the second force receiving plate 440; after the second force receiving plate 440 is mounted, the force receiving surface 441 thereof is not lower than the slot of the first mounting slot 410, i.e., the outer surface 441 protrudes from the first mounting slot 410 or is flush with the slot of the first mounting slot 410; in another embodiment, the slot of the first mounting slot 410 has a first side wall 411 and a second side wall 412 on both sides thereof, wherein the first side wall 411 is closer to the inner surface of the bottom section door leaf, and the second side wall 412 is closer to the outer surface of the bottom section door leaf; the inner surface refers to the surface of the door leaf inside the granary in the closed state, and the outer surface refers to the surface of the door leaf outside the granary in the closed state. When the bottom section door leaf is opened together with the granary door (in the direction of arrows B and C), the first frame 200 and the second frame 400 gradually move away from each other until they are completely out of contact; when the bottom section door leaf is closed together with the granary door, the first frame 200 and the second frame 400 move closer to each other until they are in stable contact, i.e., the rolling device forms point contact (ball) or line contact (roller or shaft) with the second force receiving plate 440 in the first mounting slot 410, and the granary door is closed. At this time, the first frame 200 and the second frame 400 still have a gap 500 between them except for the above-mentioned point contact or line contact.

[0045] In order to enhance the sealing effect between the two bottom section door leaves, in one embodiment, the second frame 400 is provided with a first sealing strip 401 extending in the lifting direction of the bottom section door leaf, and a first sealing groove 420 is formed in the second frame 400, the first sealing groove 420 is located on one side of the first mounting slot 410, one side of the first sealing strip 401 is embedded in the first sealing groove 420, and the other side of the first sealing strip 401 is in contact with the first frame 200 in the closed state; in one embodiment, the second frame 400 is further provided with a second sealing groove 430 for embedding a second sealing strip 402, the second sealing strip 402 is in contact with the first frame 200 in the closed state, and the first sealing groove 420 and the second sealing groove 430 are respectively located on both sides of the first mounting slot 410, as shown in Figure 6 Fig. 2, the first sealing groove 420 is located outside the first side wall 411, and the second sealing groove 430 is located outside the second side wall 412, so as to obtain a double sealing effect and also to avoid dust and other impurities entering the rolling device through the gap 500 and affecting the rolling resistance reduction effect.

[0046] As shown in Figure 3As shown, in one embodiment, two parallel resistance reduction mechanisms are provided, a first resistance reduction mechanism near the inner surface of the bottom section door leaf uses the ball 220, and a second resistance reduction mechanism near the outer surface of the bottom section door leaf uses the ball 220'. The diameters of the ball 220 and the ball 220' can be the same or different. The forces on the two during the opening and closing of the grain depot door are different. Specifically, when the grain depot door is opened, the ball 220 first moves away from the force receiving surface, and the ball 220' moves away from the force receiving surface later. When the grain depot door is closed, the ball 220' first contacts the force receiving surface, and the ball 220 contacts the force receiving surface later, until the grain depot door is completely closed. Because the ball 220 and the ball 220' have a sequential force receiving order, if it is desired that both resistance reduction mechanisms can play a role in reducing resistance, i.e. the balls of the two resistance reduction mechanisms effectively contact the force receiving surface, the diameters of the balls used by the different resistance reduction mechanisms, the distance between the force receiving surface and the ball, and the angle between the force receiving surface and the plane on which the ball holder is located can be adjusted to achieve this purpose, and further description is omitted.

Claims

1. A resistance reduction mechanism applied to a bottom section door leaf of a grain storage door, the bottom section door leaf comprising a first door leaf and a second door leaf, characterized in that: The rolling device is arranged on a first door leaf, and the force receiving surface is arranged on a second door leaf, the first door leaf and the second door leaf are in point contact or line contact when in a closed state.

2. The resistance reducing mechanism of claim 1, wherein: The first door leaf comprises a first frame having a rolling installation position for installing the rolling device, and the second door leaf comprises a second frame having the force receiving surface.

3. The resistance reducing mechanism of claim 2, wherein: The rolling device is a ball, which is installed in the rolling installation position through a ball holder, and the exposed part of the ball is less than half of the volume of the ball.

4. The resistance reducing mechanism of claim 3, wherein: The ball holder has a hole with a diameter less than the diameter of the ball.

5. A resistance reducing mechanism according to claim 4, characterised in that: The rolling installation position or the ball holder has a limiting surface.

6. The resistance reducing mechanism of claim 5, wherein: The limiting surface is a limiting convex edge, which is extended from the edge of the hole.

7. The resistance reducing mechanism of claim 2, wherein: The rolling installation position is a long slot extending along the lifting direction of the bottom door leaf, and two or more rolling devices are arranged along the extension direction of the long slot.

8. The resistance reducing mechanism of claim 2, wherein: The rolling installation position is a short slot for installing a single rolling device, and two or more rolling installation positions are arranged along the lifting direction of the bottom door leaf.

9. A bottom section door leaf of a grain gate, said bottom section door leaf comprising a first door leaf and a second door leaf, characterized in that: The number of the resistance reduction mechanisms is one or more.

10. A bottom section door leaf of a grain gate according to claim 9, characterized in that: The number of the resistance reduction mechanisms is two or more, and the two or more resistance reduction mechanisms are arranged in parallel or along the same line in the lifting direction of the bottom door leaf.

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