Gear and rack meshing structure for door opening mechanism

Abstract

The utility model discloses a gear and rack meshing structure for a door opening mechanism. The non-full-circle gear is meshed with the rack and is linked with the rack to move along the straight line; the rack is provided with a first convex tooth and a second convex tooth; a first interval space is formed between the first convex tooth and the second convex tooth; a second interval space is formed between the second convex teeth; the volume size of the first interval space is larger than that of the second interval space; the non-full-circle gear is provided with a third convex tooth and a fourth convex tooth; the thickness of the reference circle on the third convex tooth is larger than that of the reference circle on the fourth convex tooth; a third interval space is formed between the third convex tooth and the fourth convex tooth; fourth interval spaces are formed among the fourth convex teeth; the volume size of the third interval space is smaller than or equal to that of the fourth interval space; therefore, the technical problem that at the moment when the door is pushed, the convex teeth which are in contact firstly and meshed with each other bear large torque, and the convex teeth are prone to local fatigue fracture is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent household appliance door opening mechanisms, in particular to a gear and rack meshing structure used in door opening mechanisms. Background Art

[0002] The Chinese patent application number is 202320517302.0, and the subject name is the prior art of the slide rail mechanism and household appliance for the door opening and closing system, which discloses the meshing structure of the non-full circle gear and the rack, and the toothed area on the non-full circle gear meshes with the toothed part on the rack;

[0003] The convex teeth in the toothed area of ​​the non-full circle gear mesh with the convex teeth on the toothed part of the rack. The shape and size of each convex tooth are the same. However, in order to ensure that the door of a refrigerator and other household appliances is tightly closed, the suction force between the door and the door frame is often the largest, that is, the force at the moment of pushing the door is the largest. Once the door is separated from the door frame, the force required to push the door becomes relatively small. Since the shape and size of each convex tooth are the same, at the moment of pushing the door, the convex teeth that first come into contact with each other will bear a large torque, which may easily cause local fatigue fracture of the convex teeth, affecting normal use;

[0004] Therefore, a gear and rack meshing structure for a door opening mechanism is needed. Utility Model Content

[0005] In view of the above-mentioned deficiencies existing in the related art, an object is to provide a gear and rack meshing structure for a door opening mechanism, so as to solve the technical problem in the related art that at the moment of pushing the door, the convex teeth that first contact and mesh with each other will be subjected to a large torque, which may easily cause local fatigue fracture of the convex teeth.

[0006] The technical solution to achieve the purpose is: a gear and rack meshing structure for a door opening mechanism, comprising: a rack; and a non-full circle gear meshing with the rack to link the rack to move along a straight line;

[0007] The rack has a first protruding tooth and a plurality of second protruding teeth;

[0008] A first spacing space is provided between the first protruding tooth and the second protruding tooth;

[0009] There is a second spacing space between the second protruding teeth;

[0010] The volume size of the first interval space is greater than the volume size of the second interval space;

[0011] The non-full circle gear has a third convex tooth and a plurality of fourth convex teeth;

[0012] The thickness dimension at the pitch circle on the third protruding tooth is greater than the thickness dimension at the pitch circle on the fourth protruding tooth;

[0013] A third spacing space is provided between the third protruding tooth and the fourth protruding tooth;

[0014] There is a fourth spacing space between the fourth protruding teeth;

[0015] The volume size of the third partition space is less than or equal to the volume size of the fourth partition space;

[0016] The third protruding tooth, the third spacing space and one of the fourth protruding teeth are meshed with the first spacing space, or the third protruding tooth is meshed with the first spacing space;

[0017] The remaining fourth protruding teeth are meshed one-to-one with the second spacing spaces;

[0018] The second protruding teeth are meshed with the fourth spacing spaces in a one-to-one manner.

[0019] Furthermore: the first convex tooth, the second convex tooth, the third convex tooth and the fourth convex tooth have the same tooth top height.

[0020] Further: the volume size of the first protruding tooth is greater than the volume size of the second protruding tooth.

[0021] Further: the first protruding tooth has an outer shape of a right-angled trapezoidal structure;

[0022] The second protruding teeth and the second spacing space have an outer shape of a corrugated structure arranged along a straight line;

[0023] The first space has an outer shape of an inverted isosceles trapezoidal structure.

[0024] Further: when the third protruding tooth, the third spacing space and one of the fourth protruding teeth are meshed with the first spacing space, the volume size of the third spacing space is less than the volume size of the fourth spacing space, the thickness size of the third protruding tooth at the pitch circle is W2, and the thickness size of the fourth protruding tooth at the pitch circle is W1;

[0025] W1 <W2<2W1。

[0026] Furthermore: the sum B of the thickness dimensions at the pitch circle on the third protruding tooth, the third spacing space and one of the fourth protruding teeth is equal to the width dimension A on the first spacing space.

[0027] Further: when the third protruding tooth is meshed with the first spacing space, the volume size of the third spacing space is equal to the volume size of the fourth spacing space, the thickness size at the pitch circle on the third protruding tooth is W3, and the thickness size at the pitch circle on the fourth protruding tooth is W1;

[0028] W3 is 3W1.

[0029] Further: W3 is equal to the width dimension C of the first spacing space.

[0030] Further: the number of the fourth protruding teeth is ten or nine; the number of the fourth spacing spaces is nine or eight;

[0031] When the number of the fourth protruding teeth is ten, the number of the fourth spacing spaces is nine;

[0032] When the number of the fourth protruding teeth is nine, the number of the fourth spacing spaces is eight.

[0033] Further: the outer shape of the fourth protruding tooth and the fourth spacing space is a corrugated structure arranged along an arc.

[0034] The above technical scheme is adopted, which has the following beneficial effects: a gear and rack meshing structure for a door opening mechanism, compared with the related art, is provided with a rack and a non-circular gear; the rack has a first convex tooth and a plurality of second convex teeth; a first spacing space is provided between the first convex tooth and the second convex teeth; a second spacing space is provided between the second convex teeth; the volume size of the first spacing space is greater than the volume size of the second spacing space; the non-circular gear has a third convex tooth and a plurality of fourth convex teeth; the thickness dimension at the pitch circle on the third convex tooth is greater than the thickness dimension at the pitch circle on the fourth convex tooth; a third spacing space is provided between the third convex tooth and the fourth convex teeth; a fourth spacing space is provided between the fourth convex teeth; the volume size of the third spacing space is ≤ the volume size of the fourth spacing space; the third convex tooth, the third spacing space Together with a fourth convex tooth, it meshes with the first interval space, or the third convex tooth meshes with the first interval space; the remaining fourth convex teeth mesh one-to-one with the second interval space; the second convex tooth meshes one-to-one with the fourth interval space; at the moment of pushing the door, the third convex tooth first contacts the first convex tooth and the first interval space, and by increasing the volume size of the first interval space and the thickness size of the third convex tooth, the structural strength of the third convex tooth is improved, and the probability of local fatigue fracture of the convex tooth is reduced; thereby overcoming the technical problem that at the moment of pushing the door, the convex teeth that first contact and mesh with each other will be subjected to a large torque, which may easily cause local fatigue fracture of the convex teeth, and achieving the technical effect of increasing the structural strength of the convex teeth that first contact and reducing the probability of local fatigue fracture of the convex teeth, and having practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure when the third protruding tooth just contacts the first protruding tooth and the first spacing space;

[0036] Figure 2 It is a schematic diagram of the structure when the third protruding tooth is meshed with the first protruding tooth, the first spacing space and the second protruding tooth;

[0037] Figure 3 A schematic diagram of a structure in which the third protruding tooth is gradually separated from the first protruding tooth and the first spacing space, and the fourth protruding tooth is meshed with the second protruding tooth and the second spacing space;

[0038] Figure 4 for Figure 2 A partial enlarged schematic diagram of the meshing position of the third protruding tooth and the first spacing space;

[0039] Figure 5 This is one of the structural schematic diagrams of non-full circle gears;

[0040] Figure 6 This is the second structural diagram of a non-full circle gear;

[0041] Figure 7 is a schematic diagram of the structure of the rack;

[0042] In the figure: 10. rack, 11. first protruding tooth, 12. second protruding tooth, 13. first spacing space, 14. second spacing space, 20. non-full circle gear, 21. third protruding tooth, 22. fourth protruding tooth, 23. third spacing space, 24. fourth spacing space. DETAILED DESCRIPTION

[0043] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings;

[0044] A gear and rack meshing structure for a door opening mechanism solves the technical problem in the related art that at the moment of pushing the door, the first meshing convex teeth that come into contact with each other will bear a large torque, which easily causes local fatigue fracture of the convex teeth. It can be manufactured and used, and achieves the positive effect of increasing the structural strength of the convex teeth that come into contact with each other first and reducing the probability of local fatigue fracture of the convex teeth. The overall idea is as follows:

[0045] One implementation method:

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown; a gear and rack meshing structure for a door opening mechanism, comprising: a rack 10; and a non-full circle gear 20, meshing with the rack 10, linking the rack 10 to move along a straight line;

[0047] The rack 10 has a first protruding tooth 11 and a plurality of second protruding teeth 12;

[0048] A first spacing space 13 is defined between the first protruding tooth 11 and the second protruding tooth 12;

[0049] A second spacing space 14 is defined between the second protruding teeth 12;

[0050] The volume size of the first compartment 13 is greater than the volume size of the second compartment 14;

[0051] The non-circular gear 20 has a third protruding tooth 21 and a plurality of fourth protruding teeth 22;

[0052] The thickness dimension at the pitch circle on the third protruding tooth 21 is greater than the thickness dimension at the pitch circle on the fourth protruding tooth 22;

[0053] A third spacing space 23 is defined between the third protruding tooth 21 and the fourth protruding tooth 22;

[0054] There is a fourth spacing space 24 between the fourth protruding teeth 22;

[0055] The volume size of the third compartment 23 is less than or equal to the volume size of the fourth compartment 24;

[0056] The third protruding tooth 21, the third spacing space 23 and one of the fourth protruding teeth 22 are meshed with the first spacing space 13, or the third protruding tooth 21 is meshed with the first spacing space 13;

[0057] The remaining fourth protruding teeth 22 are meshed with the second spacing spaces 14 in a one-to-one manner;

[0058] The second protruding teeth 12 are meshed one-to-one with the fourth spacing space 24;

[0059] Specifically, during implementation, at the moment of pushing the door, the third protruding tooth 21 first contacts the first protruding tooth 11 and the first spacing space 13, thereby increasing the volume size of the first spacing space 13 and the thickness size of the third protruding tooth 21, thereby improving the structural strength of the third protruding tooth 21 and reducing the probability of local fatigue fracture of the protruding tooth.

[0060] Another embodiment:

[0061] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 As shown in the figure; during implementation, the tip heights of the first convex tooth 11, the second convex tooth 12, the third convex tooth 21 and the fourth convex tooth 22 are equal, with a relatively beautiful appearance, and it is beneficial for the rack 10 and the non-circular gear 20 to mesh more smoothly without getting stuck;

[0062] The volume size of the first convex tooth 11 is larger than that of the second convex tooth 12, which increases the structural strength of the first convex tooth 11. At the moment of pushing the door, the third convex tooth 21 first contacts the first convex tooth 11 and the first spacing 13. When the third convex tooth 21 contacts the first convex tooth 11, the probability of local fatigue fracture is reduced;

[0063] The number of the second convex teeth 12 is ten, and the number of the second spacings 14 is nine, realizing the linkage of the rack 10 by the non-circular gear 20 and moving along a straight line;

[0064] The outer shape of the first convex tooth 11 is a right trapezoidal structure; the outer shapes of the second convex tooth 12 and the second spacing 14 are corrugated structures arranged along a straight line; the outer shape of the first spacing 13 is an inverted isosceles trapezoidal structure; regular shapes are beneficial for processing and manufacturing, and the strength at the first convex tooth 11 is relatively high, reducing the probability of local fatigue fracture, and the corrugated structure is beneficial for meshing with the non-circular gear 20 and being linked by the non-circular gear 20 to move along a straight line;

[0065] When the third convex tooth 21, the third spacing 23 and one of the fourth convex teeth 22 mesh with the first spacing 13 together (at this time, as Figure 2 , the third convex tooth 21 contacts the first convex tooth 11, and the fourth convex tooth 22 contacts the second convex tooth 12), the volume size of the third spacing 23 < the volume size of the fourth spacing 24, the thickness size at the pitch circle of the third convex tooth 21 is W2, and the thickness size at the pitch circle of the fourth convex tooth 22 is W1; W1 < W2 < 2W1; by increasing the thickness size of the third convex tooth 21, the structural strength of the third convex tooth 21 is improved, and the probability of local fatigue fracture of the convex tooth is reduced;

[0066] The sum B of the thickness sizes at the pitch circle of the third convex tooth 21, the third spacing 23 and one of the fourth convex teeth 22 is equal to the width size A of the first spacing 13; with the control of the size, the meshing effect is better, which is beneficial for the non-circular gear 20 to smoothly link the rack 10 to move along a straight line, and it is relatively smooth when opening the door;

[0067] The number of the fourth protruding teeth 22 is ten or nine; the number of the fourth spacing spaces 24 is nine or eight; when the number of the fourth protruding teeth 22 is ten, the number of the fourth spacing spaces 24 is nine; when the number of the fourth protruding teeth 22 is nine, the number of the fourth spacing spaces 24 is eight; the linkage rack 10 is realized to move along a straight line;

[0068] The fourth protruding teeth 22 and the fourth spacing space 24 have an outer shape of a corrugated structure arranged along an arc; the corrugated structure facilitates the meshing of the non-circular gear 20 and the rack 10, and the rack 10 is linked to move along a straight line;

[0069] Another embodiment:

[0070] like Figure 6 As shown; during implementation, when the third convex tooth 21 is meshed with the first spacing space 13 (at this time, the third convex tooth 21 is in contact with the first convex tooth 11 and the second convex tooth 12), the volume size of the third spacing space 23 is equal to the volume size of the fourth spacing space 24, the thickness size at the pitch circle on the third convex tooth 21 is W3, and the thickness size at the pitch circle on the fourth convex tooth 22 is W1; W3 is 3W1; by increasing the thickness size of the third convex tooth 21, the structural strength of the third convex tooth 21 is improved, and the probability of local fatigue fracture of the convex tooth is reduced;

[0071] The W3 is equal to the width dimension C (C is equal to A) of the first interval space 13. The control of the dimension can achieve a better meshing effect, which is conducive to the non-full circle gear 20 to smoothly link the rack 10 to move along a straight line, and the door can be opened more smoothly.

[0072] The working principle is as follows: a rack 10 and a non-circular gear 20 are provided; the rack 10 has a first protruding tooth 11 and a plurality of second protruding teeth 12; a first spacing space 13 is provided between the first protruding tooth 11 and the second protruding teeth 12; a second spacing space 14 is provided between the second protruding teeth 12; the volume size of the first spacing space 13 is greater than the volume size of the second spacing space 14; the non-circular gear 20 has a third protruding tooth 21 and a plurality of fourth protruding teeth 22; the thickness size at the pitch circle on the third protruding tooth 21 is greater than the thickness size at the pitch circle on the fourth protruding tooth 22; a third spacing space 23 is provided between the third protruding tooth 21 and the fourth protruding tooth 22; a fourth spacing space 24 is provided between the fourth protruding teeth 22; the volume size of the third spacing space 23 is ≤ the volume size of the fourth spacing space The volume size of the space 24 is increased; the third convex tooth 21, the third spacing space 23 and a fourth convex tooth 22 are meshed with the first spacing space 13, or the third convex tooth 21 is meshed with the first spacing space 13; the remaining fourth convex teeth 22 are meshed one-to-one with the second spacing space 14; the second convex tooth 12 is meshed one-to-one with the fourth spacing space 24; at the moment of pushing the door, the third convex tooth 21 first contacts the first convex tooth 11 and the first spacing space 13, by increasing the volume size of the first spacing space 13 and increasing the thickness size of the third convex tooth 21, the structural strength of the third convex tooth 21 is improved, and the probability of local fatigue fracture of the convex tooth is reduced, and the non-full circle gear 20 can smoothly link the rack 10 to move along a straight line, and the door is opened smoothly;

[0073] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of description or simplified description, rather than indicating specific directions that must be possessed; the operation process described in the embodiments is not an absolute usage procedure and corresponding adjustments may be made in actual use;

[0074] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the relevant field; the words "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantity limitation, but indicate the existence of at least one, which needs to be determined according to the content of the embodiment;

[0075] The above is only a preferred specific implementation method, but the protection scope is not limited to it. Any technician familiar with this technical field can make equivalent substitutions or changes based on the technical solutions and inventive concepts within the disclosed technical scope, which should be covered by the protection scope.

Claims

1. A gear and rack meshing structure for a door opening mechanism, comprising: A rack (10); and a non-circular gear (20) meshing with the rack (10) and linking the rack (10) to move along a straight line; Features: The rack (10) has a first protruding tooth (11) and a plurality of second protruding teeth (12); A first spacing space (13) is provided between the first protruding tooth (11) and the second protruding tooth (12); A second spacing space (14) is provided between the second protruding teeth (12); The volume size of the first interval space (13) is greater than the volume size of the second interval space (14); The non-full circle gear (20) has a third convex tooth (21) and a plurality of fourth convex teeth (22); The thickness dimension at the pitch circle on the third protruding tooth (21) is greater than the thickness dimension at the pitch circle on the fourth protruding tooth (22); A third spacing space (23) is provided between the third protruding tooth (21) and the fourth protruding tooth (22); A fourth spacing space (24) is provided between the fourth protruding teeth (22); The volume size of the third partition space (23) is less than or equal to the volume size of the fourth partition space (24); The third protruding tooth (21), the third spacing space (23) and one of the fourth protruding teeth (22) are meshed together with the first spacing space (13), or the third protruding tooth (21) is meshed with the first spacing space (13); The remaining fourth protruding teeth (22) are meshed one-to-one with the second spacing spaces (14); The second protruding teeth (12) are meshed one-to-one with the fourth spacing space (24).

2. The gear and rack meshing structure for a door opening mechanism according to claim 1, characterized in that: The first protruding tooth (11), the second protruding tooth (12), the third protruding tooth (21) and the fourth protruding tooth (22) have the same tooth top height.

3. The gear and rack meshing structure for a door opening mechanism according to claim 2, characterized in that: The volume size of the first protruding tooth (11) is greater than the volume size of the second protruding tooth (12).

4. The gear and rack meshing structure for a door opening mechanism according to claim 3, characterized in that: The first protruding tooth (11) has an outer shape of a right-angled trapezoidal structure; The second protruding teeth (12) and the second spacing spaces (14) have an outer shape of a corrugated structure arranged along a straight line; The first spacing space (13) has an outer shape of an inverted isosceles trapezoidal structure.

5. A gear and rack meshing structure for a door opening mechanism according to claim 1 or 4, characterized in that: When the third protruding tooth (21), the third spacing space (23) and the fourth protruding tooth (22) are meshed together with the first spacing space (13), the volume size of the third spacing space (23) is less than the volume size of the fourth spacing space (24), the thickness size at the pitch circle on the third protruding tooth (21) is W2, and the thickness size at the pitch circle on the fourth protruding tooth (22) is W1; W1 <W2<2W1。 6. The gear and rack meshing structure for a door opening mechanism according to claim 5, characterized in that: The sum B of the thickness dimensions at the pitch circle on the third protruding tooth (21), the third spacing space (23) and one of the fourth protruding teeth (22) is equal to the width dimension A on the first spacing space (13).

7. A gear and rack meshing structure for a door opening mechanism according to claim 1 or 4, characterized in that: When the third protruding tooth (21) is meshed with the first spacing space (13), the volume size of the third spacing space (23) is equal to the volume size of the fourth spacing space (24), the thickness size at the pitch circle on the third protruding tooth (21) is W3, and the thickness size at the pitch circle on the fourth protruding tooth (22) is W1; W3 is 3W1.

8. The gear and rack meshing structure for a door opening mechanism according to claim 7, characterized in that: The W3 is equal to the width dimension C of the first spacing space (13).

9. A gear and rack meshing structure for a door opening mechanism according to claim 6 or 8, characterized in that: The number of the fourth protruding teeth (22) is ten or nine; the number of the fourth spacing spaces (24) is nine or eight; When the number of the fourth protruding teeth (22) is ten, the number of the fourth spacing spaces (24) is nine; When the number of the fourth protruding teeth (22) is nine, the number of the fourth spacing spaces (24) is eight.

10. The gear and rack meshing structure for a door opening mechanism according to claim 9, characterized in that: The outer shapes of the fourth protruding teeth (22) and the fourth spacing spaces (24) are corrugated structures arranged along an arc.

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