Transmission mechanism

Abstract

The embodiment of the utility model provides a transmission mechanism, which comprises a gear provided with a mounting hole; the damping structure is mounted in the mounting hole, the damping structure and the gear are relatively fixed in the circumferential direction, and a matching hole is formed in the damping structure; and the transmission shaft is in interference fit with the matching hole. The damping structure is arranged in the mounting hole of the gear, the transmission shaft is in interference fit with the matching hole of the damping structure, when a user normally uses the gear, power borne by the transmission mechanism is smaller than or equal to damping force provided by the damping structure, the transmission shaft and the gear can synchronously rotate, and therefore power transmission is achieved; when misoperation such as reverse force exerting exists in a user, power borne by the transmission mechanism is larger than damping force provided by the damping structure, the transmission shaft can rotate in the matching hole, and the risk that the transmission mechanism and parts connected with the transmission mechanism are damaged is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field especially is related to a transmission mechanism. BACKGROUND

[0002] The transmission mechanism is widely used in robots, toys, electronic equipment and other products to realize power transmission. During the use of these products, if the user makes a mistake such as making force in the opposite direction, the transmission mechanism and the components connected thereto are likely to be damaged. SUMMARY

[0003] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a transmission mechanism, which can reduce the risk of product damage.

[0004] The utility model discloses a kind of transmission mechanisms, transmission mechanism includes: gear, installation hole is opened;Damping structure is installed in the installation hole, and with the gear is opposite fixed in circumferential direction, the damping structure is opened with cooperation hole;Transmission shaft is in interference fit with the cooperation hole.

[0005] The transmission mechanism provided by the utility model embodiment has at least the following beneficial effects:

[0006] By setting damping structure in the installation hole of gear, and the interference fit of transmission shaft and the cooperation hole of damping structure, when user normally uses, the power received by transmission mechanism is less than or equal to the damping force provided by damping structure, transmission shaft and gear can rotate synchronously, to realize the transmission of power, when user makes a mistake such as making force in the opposite direction, the power received by transmission mechanism is greater than the damping force provided by damping structure, transmission shaft can rotate in cooperation hole, reduce the risk of damage of transmission mechanism and its connected part.

[0007] In one embodiment of the embodiment, the damping structure is in interference fit with the installation hole.

[0008] In one embodiment of the embodiment, the damping structure includes first damping block and second damping block, the outer side surface of the first damping block and the outer side surface of the second damping block are all abutted with the side wall of installation hole, and the first damping block and the second damping block enclose the cooperation hole.

[0009] In one embodiment of the implementation, the damping structure comprises a first abutting block, a first installation groove is formed in the side wall of the installation hole, the first abutting block is installed in the first installation groove, and the first abutting block is in abutment with one side of the first damping block away from the transmission shaft; and / or the damping structure comprises a second abutting block, a second installation groove is formed in the side wall of the installation hole, the second abutting block is installed in the second installation groove, and the second abutting block is in abutment with one side of the second damping block away from the transmission shaft.

[0010] In one embodiment of the implementation, the damping structure comprises a first pin shaft, a first pin groove is formed in the side wall of the first installation groove, the first pin shaft is installed in the first pin groove, and the first pin shaft is in abutment with one side of the first abutting block away from the first damping block; and / or the damping structure comprises a second pin shaft, a second pin groove is formed in the side wall of the second installation groove, the second pin shaft is installed in the second pin groove, and the second pin shaft is in abutment with one side of the second abutting block away from the second damping block.

[0011] In one embodiment of the implementation, the first pin shaft, the first abutting block and the first damping block form a first part, the second pin shaft, the second abutting block and the second damping block form a second part, and the first part and the second part are mirror-symmetric.

[0012] In one embodiment of the implementation, the outer periphery of the transmission shaft is formed with two limiting convex rings, and the two limiting convex rings are in abutment with the two sides of the damping structure in the axial direction of the transmission shaft.

[0013] In one embodiment of the implementation, the transmission mechanism comprises a cover plate, the installation hole has opposite first and second openings, the limiting convex ring away from the cover plate is arranged in the first opening, and the cover plate is arranged in the second opening.

[0014] In one embodiment of the implementation, the transmission mechanism comprises a locking piece, the cover plate is formed with a connecting hole, the gear is formed with a fixing hole, one end of the locking piece is in abutment with the cover plate, and the other end of the locking piece passes through the connecting hole and is matched with the fixing hole.

[0015] In one embodiment of the implementation, the inner wall of the matching hole is formed with a first oil storage groove, the transmission shaft is formed with a second oil storage groove, and the first oil storage groove and the second oil storage groove are communicated.

[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model makes further illustration below combining with the drawings and examples, wherein

[0018] Figure 1 It is the three-dimensional structure schematic diagram of transmission mechanism under one embodiment of the utility model embodiment,

[0019] Figure 2 It is Figure 1 The structure schematic diagram of transmission mechanism under the exploded state,

[0020] Figure 3 It is Figure 1 The cross section structure schematic diagram of transmission mechanism in the direction of view,

[0021] Figure 4 It is Figure 1 The cross section structure schematic diagram of transmission mechanism in the direction of view,

[0022] Figure 5 It is Figure 1 The three-dimensional structure schematic diagram of the first damping block of transmission mechanism.

[0023] Reference signs:

[0024] Transmission mechanism 100, gear 10, mounting hole 101, first mounting slot 102a, second mounting slot 102b, first pin slot 103a, second pin slot 103b, fixing hole 104, first opening 1011, second opening 1012, damping structure 20, matching hole 201, first damping block 21a, second damping block 21b, first abutting block 22a, second abutting block 22b, first pin shaft 23a, second pin shaft 23b, first part 20a, second part 20b, first oil storage groove 202, transmission shaft 30, limiting convex ring 31, second oil storage groove 301, cover plate 40, connecting hole 401, locking part 50. DETAILED DESCRIPTION

[0025] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0026] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship of up, down, front, back, left, right, etc. indicated is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0027] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If it is described to the first, the second is only used for distinguishing the technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0028] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood in a broad sense, and the specific meaning of the above words in the utility model can be reasonably determined by the person skilled in the art in combination with the specific content of the technical scheme.

[0029] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Please refer to Figures 1 to 3 , Figure 1 It is a three-dimensional structure schematic view of the transmission mechanism 100 under one embodiment of the utility model embodiment; Figure 2 It is Figure 1 Structure schematic view of the transmission mechanism 100 in the exploded state of Figure 3 It is Figure 1 The transmission mechanism 100 in the sectional structure schematic view in the direction of view.The utility model embodiment provides a kind of transmission mechanism 100, transmission mechanism 100 includes gear 10, damping structure 20 and transmission shaft 30.Gear 10 is provided with mounting hole 101.Damping structure 20 is installed in mounting hole 101, and it is fixed in circumferential direction with gear 10.Damping structure 20 is provided with matching hole 201, and transmission shaft 30 is interference fit with matching hole 201.

[0031] Specifically, transmission mechanism 100 can be applied to flat support, display screen support and the like support product, transmission mechanism 100 can also be applied to automobile model, aircraft model and the like toy product, transmission mechanism 100 can also be applied to sweeping robot, industrial robot and the like robot product.

[0032] In this embodiment, the gear 10 is a spur gear in parallel shaft gears, and in other embodiments, the gear 10 can also be a helical gear in parallel shaft gears or other gears, or the gear 10 can also be an intersecting shaft gear, a staggered shaft gear or other types of gears. The type of gear 10 is not specifically limited in the utility model.

[0033] In this embodiment, the transmission shaft 30 is a gear shaft, one end of the transmission shaft 30 is in interference fit with the matching hole 201, and the other end of the transmission shaft 30 is provided with external teeth, which can be engaged with other components of the product to realize power transmission. In other embodiments, the transmission shaft 30 can also be a light shaft to be fixedly connected with other components of the product or to be used to apply torque.

[0034] By providing the damping structure 20 in the mounting hole 101 of the gear 10, and the interference fit of the transmission shaft 30 and the matching hole 201 of the damping structure 20, when the user normally uses it, the power received by the transmission mechanism 100 is less than or equal to the damping force provided by the damping structure 20, the transmission shaft 30 and the gear 10 can rotate synchronously, thereby realizing power transmission, when the user exists reverse force or other misoperation, the power received by the transmission mechanism 100 is greater than the damping force provided by the damping structure 20, the transmission shaft 30 can rotate in the matching hole 201, thereby reducing the risk of damage to the transmission mechanism 100 and its connected parts.

[0035] In an embodiment of this embodiment, please refer to Figure 2 and Figure 3 The damping structure 20 is in interference fit with the mounting hole 101. Specifically, the cross-sectional shape of the damping structure 20 corresponds to the cross-sectional shape of the mounting hole 101, and the outer side of the damping structure 20 is in contact with the side wall of the mounting hole 101. By setting the damping structure 20 in interference fit with the mounting hole 101, the damping structure 20 is simple in installation, and the circumferential fixation of the damping structure 20 and the gear 10 is easy to realize.

[0036] In other embodiments, the damping structure 20 can also be installed in the mounting hole 101 by screws, bolts or other devices, so that the damping structure 20 and the gear 10 are relatively fixed in the circumferential direction.

[0037] In an embodiment of this embodiment, please refer to Figure 2 and Figure 3, the damping structure 20 includes a first damping block 21a and a second damping block 21b, the outer side of the first damping block 21a and the outer side of the second damping block 21b are in abutment with the side wall of the mounting hole 101, and the first damping block 21a and the second damping block 21b enclose the fitting hole 201. In this way, the first damping block 21a and the second damping block 21b are installed in the mounting hole 101 in an interference fit, and the first damping block 21a and the second damping block 21b can rely on the side wall of the mounting hole 101 to achieve interference extrusion on the transmission shaft 30, while reducing the assembly difficulty of the damping structure 20, and facilitating adjustment of the size of the damping force.

[0038] In the embodiment, the cross-sectional outer contour of the first damping block 21a and the second damping block 21b corresponds to the cross-sectional shape of the mounting hole 101, and is octagonal, so that the first damping block 21a and the second damping block 21b are circumferentially fixed with the gear 10.

[0039] In an embodiment of the embodiment, please refer to Figure 2 and Figure 3 , the damping structure 20 includes a first damping block 21a and a second damping block 21b, the outer side of the first damping block 21a and the outer side of the second damping block 21b are in abutment with the side wall of the mounting hole 101, and the first damping block 21a and the second damping block 21b enclose the fitting hole 201. In this way, the first damping block 21a and the second damping block 21b are installed in the mounting hole 101 in an interference fit, and the first damping block 21a and the second damping block 21b can rely on the side wall of the mounting hole 101 to achieve interference extrusion on the transmission shaft 30, while reducing the assembly difficulty of the damping structure 20, and facilitating adjustment of the size of the damping force.

[0040] In an embodiment of the embodiment, please refer to Figure 2 and Figure 3 , the damping structure 20 includes a second damping block 21b, the side wall of the mounting hole 101 is provided with a second mounting groove 102b, the second damping block 21b is installed in the second mounting groove 102b, and the side of the second damping block 21b away from the transmission shaft 30 is in abutment with the second damping block 21b. In this way, the second damping block 21b can be installed in the mounting hole 101 first, and then the second damping block 22b can be installed in the second mounting groove 102b, so that the second damping block 22b can apply pressure to the second damping block 21b, so that the second damping block 21b is pressed against the outer peripheral surface of the transmission shaft 30, the assembly method is simple, and the transmission shaft 30 can be guaranteed to receive a larger damping force.

[0041] In an embodiment of the embodiment, please refer to Figure 2 and Figure 3, the damping structure 20 comprises a first pin shaft 23a, the sidewall of the first mounting slot 102a is provided with a first pin slot 103a, the first pin shaft 23a is installed in the first pin slot 103a and abuts against the side of the first abutting block 22a away from the first damping block 21a. In this way, the first abutting block 22a can be installed in the first mounting slot 102a first, and then the first pin shaft 23a is installed in the first pin slot 103a, so that the first pin shaft 23a can support the first abutting block 22a to apply pressure to the first damping block 21a. It can be understood that the installation difficulty of the first pin shaft 23a and the first pin slot 103a is low, that is, even if part of the first abutting block 22a extends into the first pin slot 103a, the first pin shaft 23a can still enter the first pin slot 103a by extruding the first abutting block 22a and be fixed in the first pin slot 103a, so as to ensure the interference amount of the first damping block 21a and the transmission shaft 30 and ensure that the damping force acting on the transmission shaft 30 is large enough.

[0042] In one embodiment of the embodiment, please refer to Figure 2 and Figure 3 , the damping structure 20 comprises a second pin shaft 23b, the sidewall of the second mounting slot 102b is provided with a second pin slot 103b, the second pin shaft 23b is installed in the second pin slot 103b and abuts against the side of the second abutting block 22b away from the second damping block 21b. In this way, the second abutting block 22b can be installed in the second mounting slot 102b first, and then the second pin shaft 23b is installed in the second pin slot 103b, so that the second pin shaft 23b can support the second abutting block 22b to apply pressure to the second damping block 21b. It can be understood that the installation difficulty of the second pin shaft 23b and the second pin slot 103b is low, that is, even if part of the second abutting block 22b extends into the second pin slot 103b, the second pin shaft 23b can still enter the second pin slot 103b by extruding the second abutting block 22b and be fixed in the second pin slot 103b, so as to ensure the interference amount of the second damping block 21b and the transmission shaft 30 and ensure that the damping force acting on the transmission shaft 30 is large enough.

[0043] In the embodiment, the first pin shaft 23a and the second pin shaft 23b are both cylindrical, and the inner walls of the first pin slot 103a and the second pin slot 103b are both cylindrical surfaces, so as to reduce the difficulty of insertion installation.

[0044] In one embodiment of the embodiment, please refer to Figure 2 and Figure 3, the first pin shaft 23a, the first abutting block 22a and the first damping block 21a form the first part 20a, the second pin shaft 23b, the second abutting block 22b and the second damping block 21b form the second part 20b, and the first part 20a and the second part 20b are mirror-symmetric. In this way, the damping forces on both sides of the transmission shaft 30 are more uniform, the risk of the transmission shaft 30 moving or swinging is reduced, and the user experience is improved.

[0045] In an embodiment of this embodiment, please refer to Figure 2 and Figure 4 , Figure 4 is Figure 1 a schematic view of the transmission mechanism 100 in the front view direction. The outer periphery of the transmission shaft 30 is formed with two limiting convex rings 31, and in the axial direction of the transmission shaft 30, the two limiting convex rings 31 are respectively abuttable with the two sides of the damping structure 20. In this way, the damping structure 20 can be clamped between the two limiting convex rings 31, so that the transmission shaft 30 is axially fixed with the damping structure 20.

[0046] In this embodiment, the first damping block 21a and the second damping block 21b are respectively spaced apart from or abutted with the two limiting convex rings 31 on both sides in the axial direction of the transmission shaft 30. It can be understood that if the first damping block 21a and the second damping block 21b are respectively spaced apart from the two limiting convex rings 31 on both sides in the axial direction of the transmission shaft 30, the assembly difficulty can be reduced. If the first damping block 21a and the second damping block 21b are respectively abutted with the two limiting convex rings 31 on both sides in the axial direction of the transmission shaft 30, the axial fixing effect of the transmission shaft 30 with the damping structure 20 can be better.

[0047] In an embodiment of this embodiment, please refer to Figure 2 and Figure 5 , Figure 5 is Figure 1 a schematic view of the first damping block 21a of the transmission mechanism 100. The inner wall of the fitting hole 201 is provided with a first oil storage groove 202, the transmission shaft 30 is provided with a second oil storage groove 301, and the first oil storage groove 202 and the second oil storage groove 301 are communicated. It can be understood that the part (the first damping block 21a and the second damping block 21b) of the damping structure 20 surrounding the fitting hole 201 is a device with a certain elasticity, and the inner wall of the fitting hole 201 has a certain viscosity, so that the transmission shaft 30 is easy to jam in the fitting hole 201, which can damage the damping structure 20 and reduce the service life of the damping structure 20. The existence of the first oil storage groove 202 and the second oil storage groove 301 can store some lubricating oil, so that the transmission shaft 30 rotates smoothly in the fitting hole 201 under the condition of large interference, and the service life of the damping structure 20 is improved.

[0048] In the embodiment, the second oil storage groove 301 is configured as an annular groove, and the first oil storage groove 202 is configured as an X-shaped groove, and the center of the X-shaped first oil storage groove 202 is communicated with the second oil storage groove 301. It can be understood that the X-shaped first oil storage groove 202 can provide a larger lubricating area for the transmission shaft 30.

[0049] In the embodiment, the first damping block 21a and the second damping block 21b are provided with the same X-shaped first oil storage groove 202, so as to further increase the lubricating area of the transmission shaft 30.

[0050] In an embodiment of the embodiment, referring to Figure 2 and Figure 4 , the transmission mechanism 100 comprises a cover plate 40, the mounting hole 101 has opposite first and second openings 1011 and 1012, the limiting convex ring 31 away from the cover plate 40 is arranged in the first opening 1011, and the cover plate 40 is arranged in the second opening 1012. In this way, the mounting hole 101 can be closed, so as to reduce the risk of dust and other sundries entering the mounting hole 101 from the outside, and the service life of the damping structure 20 can be improved.

[0051] Specifically, the cover plate 40 abuts against the top side of the other limiting convex ring 31, and the bottom wall of the mounting hole 101 abuts against the bottom side of the first damping block 21a and the second damping block 21b, so that the transmission shaft 30 is fixed in the circumferential direction of the gear 10.

[0052] In an embodiment of the embodiment, referring to Figure 2 and Figure 4 , the transmission mechanism 100 comprises a locking piece 50, the cover plate 40 is provided with a connecting hole 401, the gear 10 is provided with a fixing hole 104, one end of the locking piece 50 abuts against the cover plate 40, and the other end of the locking piece 50 passes through the connecting hole 401 and cooperates with the fixing hole 104. Specifically, the locking piece 50 is configured as a screw, the fixing hole 104 is a threaded hole, the head of the locking piece 50 abuts against the cover plate 40, and the rod of the locking piece 50 passes through the connecting hole 401 and cooperates with the fixing hole 104 in a threaded manner, so as to realize the fixed connection between the cover plate 40 and the gear 10.

[0053] In the embodiment, the number of the locking piece 50, the connecting hole 401 and the fixing hole 104 is multiple, and they are arranged in one-to-one correspondence, so as to improve the connection strength between the cover plate 40 and the gear 10.

[0054] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A transmission mechanism (100), characterized in that, The utility model relates to a damping structure of gear, including: Gear (10) is provided with mounting hole (101); Damping structure (20) is installed in mounting hole (101), and with gear (10) is opposite fixed in circumferential direction, damping structure (20) is provided with cooperation hole (201); Transmission shaft (30) is with cooperation hole (201) interference fit.

2. The transmission (100) according to claim 1, characterized in that Damping structure (20) is with mounting hole (101) interference fit.

3. The transmission (100) according to claim 2, characterized in that Damping structure (20) includes first damping block (21a) and second damping block (21b), and the outer side of first damping block (21a) and the outer side of second damping block (21b) are all with the side wall of mounting hole (101) abut, and first damping block (21a) and second damping block (21b) are enclosed and form cooperation hole (201).

4. The transmission (100) according to claim 3, characterized in that Damping structure (20) includes first abutting block (22a), and the side wall of mounting hole (101) is provided with first installation slot (102a), and first abutting block (22a) is installed in first installation slot (102a), and is with the side of first damping block (21a) away from transmission shaft (30) abut; and / or, Damping structure (20) includes second abutting block (22b), and the side wall of mounting hole (101) is provided with second installation slot (102b), and second abutting block (22b) is installed in second installation slot (102b), and is with the side of second damping block (21b) away from transmission shaft (30) abut.

5. The transmission (100) according to claim 4, characterized in that Damping structure (20) includes first pin shaft (23a), and the side wall of first installation slot (102a) is provided with first pin slot (103a), and first pin shaft (23a) is installed in first pin slot (103a), and is with the side of first abutting block (22a) away from first damping block (21a) abut; and / or, Damping structure (20) includes second pin shaft (23b), and the side wall of second installation slot (102b) is provided with second pin slot (103b), and second pin shaft (23b) is installed in second pin slot (103b), and is with the side of second abutting block (22b) away from second damping block (21b) abut.

6. The transmission (100) according to claim 5, characterized in that First pin shaft (23a), first abutting block (22a) and first damping block (21a) form first part (20a), and second pin shaft (23b), second abutting block (22b) and second damping block (21b) form second part (20b), and first part (20a) and second part (20b) are mirror symmetry.

7. The transmission (100) of claim 1, characterized in that The outer periphery of transmission shaft (30) is formed with two limit convex rings (31), and in the axial direction of transmission shaft (30), two limit convex rings (31) can abut with both sides of damping structure (20) respectively.

8. The transmission (100) according to claim 7, characterized in that The transmission mechanism (100) comprises a cover plate (40), the mounting hole (101) has opposite first and second openings (1011 and 1012), the cover plate (40) is arranged at the second opening (1012), and the limiting convex ring (31) away from the cover plate (40) is arranged at the first opening (1011).

9. The transmission (100) according to claim 8, characterized in that The transmission mechanism (100) comprises a locking piece (50), the cover plate (40) is provided with a connecting hole (401), the gear (10) is provided with a fixing hole (104), one end of the locking piece (50) is in abutment with the cover plate (40), and the other end of the locking piece (50) passes through the connecting hole (401) and is matched with the fixing hole (104).

10. The transmission (100) of claim 1, characterized in that The inner wall of the matching hole (201) is provided with a first oil storage groove (202), the transmission shaft (30) is provided with a second oil storage groove (301), and the first oil storage groove (202) and the second oil storage groove (301) are communicated.

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