Coupling structure and application of modular coaxial gear reduction mechanism

Abstract

The present invention provides a coupling structure, which includes a shaft, a pipe and a locking assembly, wherein the end edge of the shaft is formed with a plurality of axially extending and staggered axial embedding grooves, and the axis of the pipe has a through-shaft hole corresponding to the through-shaft section of the shaft, and the inner edge surface of the through-shaft hole of the pipe is formed with a plurality of concave-edge-shaped radial embedding grooves, and the locking assembly has a coupling block and a locking piece, wherein the outer edge of the coupling block has a plurality of radial embedding blocks corresponding to the aforementioned radial embedding grooves of the pipe and a plurality of axial embedding blocks corresponding to the aforementioned axial embedding grooves of the shaft, so that the coupling block can be selectively locked between the aforementioned shaft and the pipe by using the locking piece, thereby allowing the separated shaft and the pipe to be synchronously connected axially and radially, and can greatly improve their combination strength to meet the needs of high torque drive.

Description

Technical Field

[0001] The present invention relates to the field of coupling technology, and more specifically to a coupling structure for pipes and shafts, which can synchronously connect the pipes and shafts in radial and axial directions and can be used as a pipe-shaft combination mechanism for large torque transmission. Background Art

[0002] There are many ways to combine pipes and shafts, such as gluing, screwing, welding, etc. There are different methods to meet different needs. For example, because the motor has a high speed, in some fields, when it is directly driven, it is easy to rotate too fast and cannot provide a large torque. Not only can it not achieve the intended working purpose, but it will also affect the convenience of operation. Therefore, in these fields, a reducer is generally set on the motor output shaft to reduce the speed and output a larger torque. The traditional reduction mechanism achieves the purpose of speed reduction through the gear ratio of the large and small gears, but it has problems such as complex structure and large material volume, and the reduction ratio is limited. If you want to improve its speed reduction effect, you need to add a gear set to make the structure more complicated. In order to solve this problem, the current system is mainly composed of planetary gear reducers, such as Taiwan's new patent application No. 097213180 "Reduction Device" and No. 102200801 "Planetary Gear Reducer" and other previous cases.

[0003] At present, the main structure of the planetary gear is that a sun gear is arranged on the transmission shaft, and a plurality of planetary gears are arranged around and meshed with the outer periphery of the sun gear by at least one wheel carrier, and the reduction effect is achieved by the gear ratio of the sun gear and the outer planetary gears. Since the torque of its transmission is greater than that of the general motor drive, the combination strength of the sun gear and the transmission shaft needs to be higher. Therefore, the sun gear is currently formed on the transmission shaft by processing, but this will increase the difficulty of processing the entire transmission shaft. At the same time, when there is a local processing error or maintenance is required, the entire set needs to be scrapped and replaced, causing unnecessary waste. In addition, the existing reduction mechanism has the problem of complex assembly and many procedures because the parts need to be assembled one by one on the transmission shaft and the sun gear, which affects the accuracy and concentricity after assembly, and will lead to unstable assembly and poor meshing, causing noise and poor transmission efficiency during operation.

[0004] In other words, the existing combination of shafts and tubes cannot meet the requirements of the transmission shaft and sun gear of a reduction mechanism, and cannot achieve both high bonding strength and selective combination. How to solve the above problems is what the industry and users expect, and is also what the present invention intends to explore.

[0005] In view of this, the inventor has devoted himself to studying and applying the theory to the problems faced by the above-mentioned existing devices. With many years of design, development and practical experience in the related industry, he has improved the deficiencies of the existing structures and finally successfully developed a coupling structure to overcome the troubles and inconveniences caused by the existing separate structures that cannot have both bonding strength. Summary of the invention

[0006] Therefore, the main purpose of the present invention is to provide a coupling structure, so that the separate shaft and the pipe can be synchronously connected axially and radially, and the coupling strength can be greatly improved to meet the needs of high torque drive.

[0007] In addition, the main purpose of the present invention is to provide a modular coaxial gear reduction mechanism using a coupling structure, so that most of the components can be modularized, which can facilitate the assembly, replacement and inventory management of the reduction mechanism, and can improve the concentricity of the reduction mechanism after assembly, and can make the overall assembly structure of the reduction mechanism more stable and improve the degree of meshing, so that it can reduce vibration and noise during operation, and can extend its service life, while improving the transmission efficiency.

[0008] Based on this, the present invention mainly achieves the above-mentioned purpose and its effect through the following technical means:

[0009] A coupling structure, characterized in that it comprises:

[0010] A shaft member having a shaft-penetrating section, the end edge of which is formed with a plurality of axial embedding grooves extending in the axial direction and arranged in a staggered manner, and a screw lock hole is formed at the axial center of the end surface of the shaft-penetrating section of the shaft member;

[0011] A pipe, the axis of which has an axial hole corresponding to the axial section of the shaft, the axial hole of the pipe is different from the shaft and has an engaging section formed at one end, wherein the inner edge surface of the engaging section is formed with a plurality of concave radial engaging grooves;

[0012] A locking assembly, comprising a coupling block and a locking piece, the coupling block being arranged in the through-shaft hole engaging section of the pipe piece, the outer edge of the coupling block having a plurality of radial inserts corresponding to the radial insert grooves of the pipe piece, the end surface of the coupling block having a plurality of axial inserts corresponding to the axial insert grooves of the shaft piece, the axis center of the coupling block forming a through hole for the locking piece to penetrate and press, and one end of the locking piece can be selectively locked in the screw lock hole of the shaft piece;

[0013] The coupling block is engaged and pressed between the engaging section of the pipe and the through-shaft section of the shaft, forming a coupling structure capable of synchronous axial and radial engagement and positioning.

[0014] The coupling structure, wherein: the shaft is formed with a positioning step surface on the outer edge of the shaft-penetrating section for axial positioning of the pipe.

[0015] The coupling structure is described, wherein: each axial embedding block of the coupling block of the locking group is arranged relative to each radial embedding block, and each radial embedding groove end is formed with a step portion shallower than the radial embedding groove, so that the outer edge of each axial embedding block is synchronously embedded in the step portion of the radial embedding groove of the embedding section.

[0016] A modular coaxial gear reduction mechanism using the coupling structure, characterized in that it comprises:

[0017] a housing;

[0018] A shaft member serving as a transmission shaft, pivotally mounted on the housing;

[0019] An internally toothed ring rail, the lock of which is mounted on the housing;

[0020] A coaxial gear set includes a tube serving as a sun gear, a planetary gear set and an output member, wherein the outer edge of the tube is formed with teeth, and the tube can be selectively locked to the aforementioned shaft, the planetary gear set is pivoted between the two ends of the tube, the planetary gear set can synchronously engage with the tube and the inner gear ring track, the output member is arranged on the side of the planetary gear set different from the inner gear ring track, and the output member can be driven by the planetary gear set.

[0021] The modular coaxial gear group reduction mechanism, wherein: the planetary gear group of the coaxial gear group is respectively pivotally provided with a first wheel frame and a second wheel frame opposite to each other at both ends of the tube, and a plurality of planetary gears are pivotally provided on the outer periphery of the tube between the first wheel frame and the second wheel frame, and each of the planetary gears has a first wheel portion that can synchronously engage with the tube and the internal gear ring track, and each of the planetary gears has a second wheel portion that can engage with the output member, and the output member is pivotally provided on the second wheel frame of the planetary gear group.

[0022] The modular coaxial gear set speed reduction mechanism, wherein: the first wheel frame and the second wheel frame of the planetary gear set are pivotally mounted on both ends of the pipe using a first bearing and a second bearing respectively.

[0023] The modular coaxial gear set reduction mechanism, wherein: the second wheel carrier axis of the planetary gear set has a shaft tube for mounting the output member, and the shaft tube uses a third bearing to pivot the output member.

[0024] The modular coaxial gear reduction mechanism, wherein: the relative surfaces of the first wheel frame and the second wheel frame of the planetary gear set are formed with a plurality of countersunk columns that are in contact with each other, and the countersunk columns are respectively penetrated by a screw lock that can be relatively locked, so that the first wheel frame and the second wheel frame on the pipe can be covered and integrated into one.

[0025] The modular coaxial gear reduction mechanism, wherein: a plurality of shafts for mounting planetary gears are arranged between the first wheel frame and the second wheel frame, and each of the shafts is provided with a relative planetary gear pivotally arranged by at least one bearing.

[0026] The modular coaxial gear reduction mechanism, wherein: the inner edge of the output member has an inner tooth edge that can mesh with the second wheel portion of each planetary gear, and the outer edge of the output member has a driving wheel portion that can transmit power.

[0027] Thus, through the specific implementation of the above-mentioned technical means, the present invention can utilize the radial embedment block and the axial embedment block of the locking group to synchronously embed the pipe fittings and the shaft fittings, so that the separate shaft fittings and pipe fittings can be synchronously connected axially and radially, and their bonding strength can be greatly improved to meet the needs of high torque drive, thereby increasing the added value of the product and improving its economic benefits.

[0028] In addition, each axial embedding block of the coupling block of the locking group can be arranged opposite to each radial embedding block, and a shallow step portion is formed at the end of each radial embedding groove, so that the outer edge of each axial embedding block can be synchronously embedded in the step portion of the radial embedding groove of the embedding section to improve the embedding effect.

[0029] In order to further understand the composition, features and other purposes of the present invention, several preferred embodiments of the present invention are given below and described in detail with reference to the drawings, so that those skilled in the art can implement them. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional exploded schematic diagram of the coupling structure of the present invention, for illustrating the states of its main components and their relative relationships.

[0031] Figure 2 It is a partial cross-sectional schematic diagram of the coupling structure of the present invention after assembly, for illustrating the assembled state and relative relationship thereof.

[0032] Figure 3 It is a three-dimensional exploded schematic diagram of the coupling structure of the present invention applied to a modular coaxial gear group reduction mechanism.

[0033] Figure 4 It is a side cross-sectional schematic diagram of the coupling structure of the present invention before being assembled in a modular coaxial gear group reduction mechanism.

[0034] Figure 5 It is a side cross-sectional schematic diagram of the coupling structure of the present invention after being assembled in a modular coaxial gear group reduction mechanism.

[0035] Description of reference numerals: 10-shaft member; 11-shaft-through section; 12-positioning step surface; 14-axial embedding groove; 15-screw lock hole; 20-pipe fitting; 21-shaft-through hole; 22-embedded section; 23-radial embedding groove; 24-step section; 25-tooth; 26-shaft seat; 27-shaft seat; 28-first bearing; 29-second bearing; 30-locking group; 31-coupling block; 32-radial embedding block; 33-axial embedding block; 34-perforation; 35-locking piece; 50-housing; 55-internal gear ring rail; 56-internal gear ring rail; 57-internal gear ring rail; 58-internal gear ring rail; 59-internal gear ring rail; 60-internal gear ring rail; 61-internal gear ring rail; 62-internal gear ring rail; 63-internal gear ring rail; 64-internal gear ring rail; 65-internal gear ring rail; 66-internal gear ring rail; 67-internal gear ring rail; 68-internal gear ring rail; 69-internal gear ring rail; 70-internal gear ring rail; 71-internal gear ring rail; 72-internal gear ring rail; 73-internal gear ring rail; 74-internal gear ring rail; 75-internal gear ring rail; 76-internal gear ring rail; 77-internal gear ring rail; 78-internal gear ring rail; 79-internal gear ring rail; 80-internal gear ring rail; 81-internal gear ring rail; 82-internal gear ring rail; 83-internal gear ring rail; 84-internal gear ring rail; 85-internal gear ring rail; 86-internal gear ring 8-shell cover; 60-coaxial gear set; 70-planetary gear set; 71-first wheel frame; 710-counterbore column; 711-screw lock; 72-axle; 721-bearing; 73-stage planetary gear; 731-first wheel portion; 732-second wheel portion; 75-second wheel frame; 750-counterbore column; 751-screw lock; 76-axle tube; 760-stage mounting hole; 761-mounting shaft; 762-through hole; 80-output member; 81-third bearing; 82-inner tooth edge; 85-driving wheel portion. DETAILED DESCRIPTION

[0036] The present invention is a coupling structure and a modular coaxial gear reduction mechanism using the same. In the specific embodiments of the present invention and its components illustrated in the accompanying drawings, all references to front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical are only used for convenience of description and are not intended to limit the present invention or its components to any position or spatial direction. The dimensions specified in the drawings and the specification may be changed according to the design and requirements of the present invention without leaving the scope of protection of the present invention.

[0037] The coupling structure of the present invention is as follows: Figure 1 , Figure 2 The disclosed one is composed of a shaft 10, a tube 20 which can be sleeved on the shaft 10, and a locking assembly 30 which can connect the shaft 10 and the tube 20;

[0038] The shaft member 10 may be a transmission shaft, such as a sun gear transmission shaft of a speed reduction mechanism. The shaft member 10 has a through-shaft section 11, and a positioning step surface 12 is formed on the outer edge of the through-shaft section 11 of the shaft member 10 for axial positioning of the pipe member 20. The through-shaft section 11 of the shaft member 10 has a plurality of axially extending and staggered axial embedding grooves 14 formed at the end edge thereof. Furthermore, a screw lock hole 15 is formed at the axial center of the end face of the through-shaft section 11 of the shaft member 10.

[0039] The axis of the tube 20 has a through-shaft hole 21 corresponding to the through-shaft section 11 of the shaft 10, and the through-shaft hole 21 is formed with an engaging section 22 at one end of the shaft 10, and the inner edge of the engaging section 22 is formed with a plurality of concave radial engaging grooves 23, and each end of the radial engaging groove 23 is formed with a shallower step portion 24. According to some embodiments, when the tube 20 can be a transmission part, such as a sun gear of a speed reduction mechanism, the outer edge of the tube 20 is formed with a plurality of meshing teeth 25, and the two ends of the tube 20 are respectively formed with a shaft seat 26, 27 for setting a bearing;

[0040] As for the locking assembly 30, it has a coupling block 31 and a locking member 35, wherein the coupling block 31 can be embedded in the embedding section 22 of the through-shaft hole 21 of the pipe 20, and the outer edge of the coupling block 31 has a plurality of radial embedding blocks 32 corresponding to the radial embedding grooves 23 of the embedding section 22, and the end surface of the coupling block 31 has a plurality of axial embedding blocks 33 corresponding to the axial embedding grooves 14 of the through-shaft section 11, wherein each of the axial embedding blocks 33 can be engaged with each of the radial The insert blocks 32 are arranged relative to each other, so that the outer edges of the axial insert blocks 33 can be synchronously inserted into the step portion 24 of the radial insert groove 23 of the inserting section 22 to improve the inserting effect. The coupling block 31 is formed with a through hole 34 at the axis center for the aforementioned locking member 35 to pass through, and one end of the locking member 35 can be selectively locked in the screw hole 15 of the aforementioned shaft member 10, so that the coupling block 31 is inserted and pressed between the inserting section 22 of the pipe member 20 and the shaft section 11 of the shaft member 10;

[0041] Thereby, a coupling structure is formed which can be synchronously engaged in the axial direction and radial direction and positioned.

[0042] The coupling structure of the present invention can be applied to a modular coaxial gear reduction mechanism, such as Figure 3 , Figure 4 and Figure 5 The disclosed speed reduction mechanism comprises a housing 50, a shaft 10 provided at the axis of the housing 50 as a transmission shaft, an inner gear ring track 55 provided at the inner edge of the housing 50, and a coaxial gear set 60 provided between the shaft 10 and the inner gear ring track 55, wherein one end of the housing 50 can be locked with a housing cover 58;

[0043] The coaxial gear set 60 includes a tube member 20 with meshing teeth 25 as a sun gear, a planetary gear set 70 and an output member 80. The tube member 20 as the sun gear is locked on the shaft member 10 as the transmission shaft by using the coupling block 31 and the locking member 35 of the locking set 30 (such as Figure 5As shown), the planetary gear set 70 is pivotally mounted on the tube 20 as a sun gear through a first bearing 28 and a second bearing 29 located on the shaft seats 26 and 27 at both ends of the tube 20. The two sides of the planetary gear set 70 respectively have a first wheel frame 71 and a second wheel frame 75 disposed on the first and second bearings 28 and 29 and a plurality of step planetary gears 73 meshing around the tube 20, wherein the axis of the second wheel frame 75 has a shaft tube 76 for mounting the output member 80, and the free end of the shaft tube 76 can be pivotally mounted on the housing cover 58 through a bearing (as shown in FIG. Figure 5 As shown in the figure, the center of the shaft tube 76 of the second wheel frame 75 has a first-stage mounting hole 760 for the end of a mounting shaft 761 to pass through, and one end of the mounting shaft 761 can be set at the other end of the pipe 20 through the second bearing 29, wherein the mounting shaft 761 has a through hole 762 for the use of a hand tool to penetrate and operate the locking member 35 of the coupling block 31 of the aforementioned locking assembly 30, and the first and second wheel frames 71, 75 have a plurality of countersunk columns 710, 750 that are relatively abutted on the opposite surfaces, and are respectively penetrated with a screw lock member 711, 712 that can be relatively locked. 51, so that the first and second wheel frames 71, 75 of the planetary gear set 70 can be covered and integrated, and a plurality of shafts 72 for mounting the stage planetary gears 73 are provided between the first and second wheel frames 71, 75, and each of the shafts 72 is pivotally provided with a corresponding stage planetary gear 73 by using at least one bearing 721, so that each stage planetary gear 73 is pivotally provided between the first and second wheel frames 71, 75, and each stage planetary gear 73 has a first wheel portion 731 (such as Figure 5 As shown), the first wheel portion 731 of each stage planetary gear 73 is integrally formed with a second wheel portion 732 (as shown) that can mesh with the output member 80. Figure 5 As shown in the figure, the output member 80 is pivotally mounted on the shaft tube 76 of the second wheel carrier 75 of the planetary gear set 70 by means of a third bearing 81, and the inner edge of the output member 80 has an inner tooth edge 82 that can mesh with the second wheel portion 732 of the step planetary gear 73 of the planetary gear set 70, and the outer edge of the output member 80 has a driving wheel portion 85 that can mesh with a passive member (not shown in the figure).

[0044] As for the actual operation of the coupling structure of the present invention, it is as follows Figure 3 , Figure 4 and Figure 5As shown, the coaxial gear set 60 is installed on the shaft section 11 of the shaft member 10 serving as the transmission shaft through the shaft hole 21 of the pipe 20 serving as the sun gear, and the coupling block 31 embedded in the pipe 20 is relatively engaged with the axial groove 14 of the shaft section 11 through the axial embedding block 33, and the locking piece 35 is operated to press the coupling block 31 and lock it in the screw hole 15 of the shaft section 11 of the shaft member 10, so that the entire coaxial gear set 60 is fixed on the shaft member 10 serving as the transmission shaft. In this way, the pipe 20 serving as the sun gear in the coaxial gear set 60 can be synchronously connected to the shaft member 10 serving as the transmission shaft in the axial and radial directions, so as to meet the large torque requirement during driving.

[0045] Through the above-mentioned design and description, the coupling structure of the present invention utilizes the radial insert 32 and the axial insert 33 of the coupling block 31 of the locking group 30 to synchronously insert the pipe 20 and the shaft 10, so that the separate shaft 10 and the pipe 20 can be synchronously connected axially and radially, and can greatly improve their bonding strength to meet the needs of high torque drive. At the same time, if applied to a reduction mechanism, it can be modularized by its coaxial gear group 60, which can facilitate the assembly, replacement and inventory management of the reduction mechanism, and can improve the concentricity of the reduction mechanism after assembly, and can make the overall assembly structure of the reduction mechanism more stable and improve the meshing degree, so that it can reduce vibration and noise during operation, and can extend its service life, and at the same time improve the transmission efficiency.

[0046] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. A coupling structure, characterized in that: Contains: A shaft member having a shaft-penetrating section, the end edge of which is formed with a plurality of axial embedding grooves extending in the axial direction and arranged in a staggered manner, and a screw lock hole is formed at the axial center of the end surface of the shaft-penetrating section of the shaft member; A pipe, the axis of which has an axial hole corresponding to the axial section of the shaft, the axial hole of the pipe is different from the shaft and has an engaging section formed at one end, wherein the inner edge surface of the engaging section is formed with a plurality of concave radial engaging grooves; A locking assembly, comprising a coupling block and a locking piece, the coupling block being arranged in the through-shaft hole engaging section of the pipe piece, the outer edge of the coupling block having a plurality of radial inserts corresponding to the radial insert grooves of the pipe piece, the end surface of the coupling block having a plurality of axial inserts corresponding to the axial insert grooves of the shaft piece, the axis center of the coupling block forming a through hole for the locking piece to penetrate and press, and one end of the locking piece can be selectively locked in the screw lock hole of the shaft piece; The coupling block is engaged and pressed between the engaging section of the pipe and the shaft-penetrating section of the shaft, forming a coupling structure capable of synchronous axial and radial engagement and positioning.

2. The coupling structure according to claim 1, characterized in that: The shaft member is provided with a positioning step surface at the outer edge of the shaft-penetrating section for axial positioning of the pipe member.

3. The coupling structure according to claim 1, characterized in that: The axial inserts and radial inserts of the coupling block of the locking assembly are arranged opposite to each other, and the ends of the radial embedding grooves are formed with stepped portions shallower than the radial embedding grooves, so that the outer edges of the axial inserts are synchronously embedded in the stepped portions of the radial embedding grooves of the embedding sections.

4. A modular coaxial gear reduction mechanism using the coupling structure according to any one of claims 1 to 3, characterized in that: Contains: a housing; A shaft member serving as a transmission shaft, pivotally mounted on the housing; An internally toothed ring rail, the lock of which is mounted on the housing; A coaxial gear set includes a tube serving as a sun gear, a planetary gear set and an output member, wherein the outer edge of the tube is formed with teeth, and the tube can be selectively locked to the aforementioned shaft, the planetary gear set is pivoted between the two ends of the tube, the planetary gear set can synchronously engage with the tube and the inner gear ring track, the output member is arranged on the side of the planetary gear set different from the inner gear ring track, and the output member can be driven by the planetary gear set.

5. The modular coaxial gear reduction mechanism according to claim 4, characterized in that: The planetary gear set of the coaxial gear set is respectively pivotally provided with a first wheel frame and a second wheel frame opposite to each other at both ends of the tube, and a plurality of planetary gears are pivotally provided on the outer periphery of the tube between the first wheel frame and the second wheel frame, and each of the planetary gears has a first wheel portion that can synchronously mesh with the tube and the internal gear ring track, and each of the planetary gears has a second wheel portion that can mesh with the output member, and the output member is pivotally provided on the second wheel frame of the planetary gear set.

6. The modular coaxial gear reduction mechanism according to claim 5, characterized in that: The two ends of the pipe are respectively pivotally provided with a first bearing and a second bearing on the first wheel frame and the second wheel frame of the planetary gear set.

7. The modular coaxial gear reduction mechanism according to claim 5, characterized in that: The axis of the second wheel frame of the planetary gear set has a shaft tube for installing an output member, and the shaft tube uses a third bearing to pivot the output member.

8. The modular coaxial gear reduction mechanism according to claim 5, characterized in that: The first wheel frame and the second wheel frame of the planetary gear set have a plurality of countersunk columns that abut against each other on their relative surfaces, and the countersunk columns are respectively penetrated with a screw lock that can be relatively locked, so that the first wheel frame and the second wheel frame on the pipe can be covered and integrated.

9. The modular coaxial gear reduction mechanism according to claim 5, characterized in that: A plurality of shafts for mounting planetary gears are arranged between the first wheel frame and the second wheel frame, and each shaft has a corresponding planetary gear pivotally arranged on it by at least one bearing.

10. The modular coaxial gear reduction mechanism according to claim 5, characterized in that: The inner edge of the output member has an inner tooth edge that can mesh with the second wheel portion of each of the planetary gears, and the outer edge of the output member has a driving wheel portion that can transmit power.

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