CN216692030U - Transmission assembly and intelligent equipment - Google Patents

Abstract

The application provides a transmission assembly and smart machine, transmission assembly include first gear, second gear, transmission shaft, third gear, fourth gear, first regulating part and second regulating part, and first gear and second gear meshing are connected, are equipped with the shaft hole on the second gear. One part of the transmission shaft extends into the shaft hole and is in spline connection with the second gear. The third gear is meshed with the fourth gear, and the third gear is arranged at the end part of the transmission shaft. The first adjusting piece is directly or indirectly arranged on the second gear, and the first adjusting piece can enable the second gear to move relative to the transmission shaft so as to adjust the backlash between the second gear and the first gear. The second adjusting piece is directly or indirectly arranged on the third gear, and the second adjusting piece can enable the third gear to move relative to the second gear so as to adjust the backlash between the third gear and the fourth gear.

Description

Transmission assembly and intelligent equipment

Technical Field

The application relates to the technical field of transmission, in particular to a transmission assembly and intelligent equipment.

Background

When a pair of gears are in a meshing state, one gear tooth of the driving gear always presses one gear tooth of the driven gear, so that force can be transmitted from the driving gear to the driven gear, but a gap exists between the two gear teeth behind (namely, on a non-meshing surface) the pair of meshed gear teeth, the gap is called a gear backlash, in other words, the gear backlash is the gear tooth gap of a non-stressed surface of the gear, and the gear backlash is caused by processing and installation errors.

When the gear back clearance adjusting mechanism is applied to general mechanical equipment, the requirement on positioning precision is not high, so that the gear back clearance can meet the use requirement without adjustment, and for intelligent equipment requiring high positioning precision, the gear back clearance can cause certain errors when the intelligent equipment moves towards the opposite direction, and the integral positioning precision of numerical control mechanical equipment is influenced, so that the gear back clearance must be adjusted in a transmission system of the intelligent equipment.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the application provides a transmission assembly.

A second aspect of the present application is to provide a smart device.

In view of this, according to a first aspect of the present application, a transmission assembly is provided, which includes a first gear, a second gear, a transmission shaft, a third gear, a fourth gear, a first adjusting member and a second adjusting member, wherein the first gear and the second gear are engaged and connected, and a shaft hole is formed on the second gear. One part of the transmission shaft extends into the shaft hole and is in spline connection with the second gear. The third gear is meshed with the fourth gear, and the third gear is arranged at the end part of the transmission shaft. The first adjusting piece is directly or indirectly arranged on the second gear, and the first adjusting piece can enable the second gear to move relative to the transmission shaft so as to adjust the backlash between the second gear and the first gear. The second adjusting piece is directly or indirectly arranged on the third gear, and the second adjusting piece can enable the third gear to move relative to the second gear so as to adjust the backlash between the third gear and the fourth gear.

The application provides a transmission assembly, including first gear, second gear, transmission shaft, third gear, fourth gear, first regulating part and second regulating part. Wherein, first gear and second gear meshing are connected, are equipped with the shaft hole on the second gear, and a part of transmission shaft stretches into in the shaft hole with second gear spline connection, specifically, be equipped with the internal spline on the shaft hole inner wall of second gear, be equipped with the external spline on the surface of transmission shaft, second gear and transmission shaft pass through the internal spline and realize spline transmission with the external spline cooperation, can take place relative motion in the axial between second gear and the transmission shaft promptly. The spline connection can ensure that the stress of the connection of the second gear and the transmission shaft is more uniform. The first adjusting piece is directly or indirectly arranged on the second gear, and the first adjusting piece can drive the second gear to move axially relative to the transmission shaft, so that the back clearance between the second gear and the first gear is controlled.

Further, a third gear and a fourth gear are in meshed connection, the third gear is arranged at the end of the transmission shaft, and the third gear and the transmission shaft move synchronously. The second adjusting piece is directly or indirectly arranged on the third gear, and the second adjusting piece can enable the third gear to move relative to the second gear so as to adjust the backlash between the third gear and the fourth gear.

The first gear and the second gear are arranged on the transmission shaft, the second gear is movably connected with the transmission shaft, the third gear is fixedly connected with the transmission shaft, and the first adjusting piece and the second adjusting piece cannot affect each other when adjusting the positions of the second gear and the third gear respectively. In other words, during the operation of the transmission assembly, there are two meshing gear sets, for example, the first and second gears form a primary gear set and the third and fourth gears form a secondary gear set. The ideal installation positions of the power input end and the power output end are limited, namely the position of one gear in the primary gear set and the secondary gear set is fixed, for example, the position of the first gear as the power input end and the position of the fourth gear as the power output end cannot move. Another gear of the primary gear set and the secondary gear set is coaxially arranged, for example, the second gear and the third gear are respectively arranged on the transmission shaft, at this time, in order to ensure that the gear backlash of each stage of gear set is within a reasonable range, the positions of the two coaxially arranged gears need to be adjusted, that is, the positions of the second gear and the third gear are adjusted, so that the backlash of each stage of gear set meets the requirement.

Through setting up first regulating part, second regulating part and independently adjusting the position of second gear and third gear respectively in this application, adjust the axial position of second gear and third gear for the gear back clearance of every grade of gear train can both obtain reasonable adjustment, and then reduces or even eliminates the back clearance, satisfies the function of big reduction ratio and diversion, easy operation, assembly efficiency also can effectively be promoted.

It is worth to be noted that, in the transmission process, the first gear serves as a power input end, and is transmitted through the second gear, the transmission shaft and the third gear, and the fourth gear serves as a power output end.

In one possible design, further, the transmission assembly includes a housing having a receiving cavity, and the first bearing, at least a portion of the second gear being located in the receiving cavity. The first bearing is arranged on the second gear. Wherein the first part of the first adjusting piece is contacted with the first bearing, and the second part of the first adjusting piece is detachably arranged on the shell.

In this design, the transmission assembly includes a housing and a first bearing, the housing having a receiving cavity for receiving a portion of the first gear, a portion of the second gear, and a portion of the transmission shaft. A part of the first gear extends into the accommodating cavity and is in meshed connection with the second gear. The second gear includes the supporting part and establishes the teeth of a cogwheel on the supporting part, and the teeth of a cogwheel are established in the axial one side of supporting part in order to mesh with first gear, are equipped with the shaft hole that the axial runs through on the supporting part, and the middle part at the second gear is worn to establish by the transmission shaft.

The first bearing is sleeved on the second gear in a sleeved mode, the bearing inner ring of the first bearing is matched with the outer surface of the second gear, and the bearing outer ring of the first bearing is matched with the first adjusting piece. Specifically, the first part of the first adjusting piece can be matched with a bearing outer ring of the first bearing, the second part of the first adjusting piece can be detachably mounted on the shell, when the first adjusting piece is locked on the shell, the first adjusting piece can clamp the second gear through the first bearing, and along with further locking of the first adjusting piece, a back clearance between the second gear and the first gear can be smaller and smaller.

In a possible design, further, the outer surface of the second gear is provided with a mounting groove, and the first bearing is located in the mounting groove.

In the design, the second gear comprises a supporting part and gear teeth, a mounting groove is formed between the supporting part and the gear teeth, the first bearing is sleeved on the supporting part and is in contact with the back surface of the gear teeth, and the front surface of the gear teeth is used for being in meshed connection with the first gear. Through set up the mounting groove on the second gear to can realize the location installation of first bearing, easy to assemble also can ensure the positional stability of first bearing.

In one possible design, the first bearing is further an angular contact bearing. The angular contact bearing comprises a bearing inner ring, a bearing outer ring and a steel ball positioned between the bearing inner ring and the bearing outer ring, wherein a connecting line of contact points of the steel ball, the bearing inner ring and the bearing outer ring forms an angle with the radial direction. The angular contact bearing mainly bears larger unidirectional axial load, and the larger the contact angle is, the larger the load bearing capacity is.

In one possible design, the number of the first bearings is at least two, and the at least two first bearings are arranged in an axial stack.

In this design, the number of the first bearings is at least two, the at least two first bearings are arranged in an axial stack, and by arranging the at least two first bearings on the second gear, the contact area between the second gear and the first bearings can be increased, so that the first adjusting member can better clamp the second gear through the at least two first bearings.

Furthermore, a part of the first adjusting piece extends towards the rotating shaft to form a partition part, and the partition part is located between two adjacent first bearings, so that not only can reliable structural support be provided for the at least two first bearings respectively, but also the at least two first bearings can be mutually independent and do not influence each other.

In a possible design, further, the first adjusting member is a supporting plate, an avoiding opening is formed in the supporting plate, and the second gear, the transmission shaft and a part of the first bearing are located in the avoiding opening.

In this design, first regulating part is the backup pad, is equipped with in the backup pad and dodges the mouth, and first regulating part roughly is the loop configuration promptly, can overlap and establish on transmission shaft, second gear, dodges the mouth and can ensure the assemblability between the structure, avoids relevant interference, simultaneously, can also make things convenient for first regulating part installation, promotes assembly efficiency.

In one possible design, the transmission assembly further includes a first fastener, and the first fastener is connected with the first bearing and the second gear.

In this design, the transmission assembly further comprises a first fastening member, which is fitted to the second gear, on the side of the first bearing facing away from the third gear, and which also enables pre-assembly of the partial assembly in the transmission assembly.

In particular, the second gear wheel, the at least two first bearings, the first adjustment member and the first fastening member may constitute a first pre-assembly, in the preassembling process of the first preassembly assembly, firstly, the first bearing and the supporting plate are respectively sleeved on the second gear, when the number of the first bearings is two, the first bearing can be firstly sleeved on the mounting groove of the second gear, then the supporting plate is sleeved on the first bearing, and then the other first bearing is sleeved on the second gear, at the moment, since a part of the support plate extends inwards to form the partition part which is clamped between the two first bearings, the support plate and the second gear can form a whole, and finally, the first fastener is then tightened onto the second bearing until the first subassembly has been preassembled to form a unitary member.

Wherein, the first fastener is lock nut, can think, is equipped with the screw thread that is used for lock nut to connect on the surface of second gear.

In one possible design, further, the first and second gears are hypoid gears.

In this design, the first gear and the second gear are meshing hypoid gears, wherein the first gear is a hypoid pinion and the second gear is a hypoid bull.

The hypoid gear pair axis has offset distance, so that the transmission design and arrangement are more flexible, and the strength of the small wheel can be improved. The hypoid gear pair small wheel has a larger helical angle, so that a larger contact ratio is obtained when the hypoid gear pair small wheel is meshed with the hypoid gear pair small wheel, and the transmission is more stable. In the transmission process, the gear grinding machine can slide relatively along the tooth length direction and the tooth height direction, so that the tooth grinding manufacturability of the heat-treated workpiece is better. However, since the relative sliding is larger than that of the bevel gear, the possibility of occurrence of early wear is also large, and therefore care is taken to select the lubricating oil.

In a possible design, the end of the transmission shaft facing away from the third gearwheel is further provided with an external thread. The second adjustment member includes a second fastener disposed at the external thread.

In this design, the end of the transmission shaft facing away from the third gear is provided with an external thread. The second regulating part comprises a second fastener, the second fastener is arranged at the external thread, namely the second regulating part can be locked on the transmission shaft, the transmission shaft can drive the third gear to move in the axial direction in the locking process of the second regulating part, so that the back clearance between the third gear and the fourth gear can be reduced or eliminated, and the operation is convenient and fast.

In a possible design, further, a part of the transmission shaft extends away from the central axis to form a limit convex part, and the third gear is in fit connection with the limit convex part.

In this design, a part of transmission shaft deviates from the central axis and extends, namely a part of transmission shaft outwards protrudes to form a limiting convex part, and the third gear is sleeved on the transmission shaft and can be connected with the limiting convex part in a matching manner, so that the positioning and installation of the third gear are realized, and the position stability of the third gear is ensured.

In a possible design, further, the transmission assembly further includes a second bearing, the second bearing is disposed on the transmission shaft, and the second bearing is located on a side of the limit convex portion facing away from the third gear.

In this design, transmission assembly still includes the second bearing, and the second bearing cover is established on the transmission shaft, and the second bearing is located one side that spacing convex part deviates from the third gear, and the second bearing can auxiliary drive axle move at the axial, makes the removal of transmission shaft more steady.

And for the limit convex part, the third gear and the second bearing are respectively positioned at two axial sides of the limit convex part.

In a possible design, further, the transmission assembly further includes an elastic member, the elastic member is sleeved on the transmission shaft, and the elastic member is located between the second gear and the third gear.

In this design, transmission assembly still includes the elastic component, and the elastic component cover is established on the transmission shaft, and the elastic component is located between second gear and the third gear, and when the second fastener locking was on the transmission shaft, under the effect of elastic component, can adjust the position of transmission shaft, third gear, and then in order to reduce the back clearance between third gear and the fourth gear, fixes the second fastener and can accomplish overall control on the transmission shaft at last.

In particular, the elastic member is a belleville spring.

In a possible design, further, the transmission assembly further includes a spacer ring movably sleeved on the transmission shaft, and the spacer ring is located between the elastic member and the second bearing.

In the design, the transmission assembly further comprises a spacer ring, the spacer ring is movably sleeved on the transmission shaft, and the spacer ring is located between the elastic piece and the second bearing. The spacer ring can ensure the axial height between the third gear and the second gear, so that enough axial space is reserved between the second gear and the third gear, and the first gear and the second gear are convenient to match.

Wherein, along axial direction, for the transmission shaft, overlap in proper order and be equipped with second gear, elastic component, spacer ring, second bearing and third gear.

Furthermore, one side of the second bearing, which is far away from the limit convex part, is also provided with a clamp spring, the clamp spring is in interference fit with the transmission shaft, and the position stability of the second bearing is better under the action of the clamp spring and the limit convex part.

Specifically, the second bearing, the snap spring, the spacer ring, the elastic piece, the third gear and the transmission shaft can form a second pre-assembly, and in the pre-installation process of the second pre-assembly, the third gear and the transmission shaft can be connected in a matched mode firstly, and then the second bearing, the snap spring, the spacer ring and the elastic piece are sequentially sleeved on the transmission shaft to form the second pre-assembly.

And then, inserting the second pre-assembly into the shaft hole of the second gear in the first pre-assembly to realize the spline connection between the transmission shaft and the second gear, and then fixing the second pre-assembly by a second fastener.

Further, the integral assembly of the first subassembly and the second subassembly is loaded into the housing, the position of the second gear is adjusted by rotating the first adjustment member to reduce backlash between the second gear and the first gear, and the first adjustment member is locked to the housing by a bolt after adjustment, thereby completing the position adjustment of the primary gear set. Subsequently, through adjusting the second fastener, under the effect of elastic component, the position of adjustment third gear reduces the back clearance, fixes second fastener afterwards, can accomplish the regulation.

In one possible design, further, the second bearing is a roller bearing.

In this design, the roller bearing is one of the rolling bearings, one of the components widely used in modern machinery. It relies on rolling contact between the primary elements to support the rotating parts. Roller bearings are now mostly standardized. The roller bearing has the advantages of small moment required by starting, high rotation precision, convenience in selection and the like. In particular, the second bearing is a cylindrical roller bearing.

In one possible design, further, the third gear and the fourth gear are bevel gears.

In this design, the third and fourth gears are bevel gears that transmit motion and power between two intersecting axes, and in general machines, the angle of intersection between the axes of the bevel gears is equal to 90 ° (but may not be equal to 90 °). Like cylindrical gears, bevel gears have reference cones, addendum cones, dedendum cones, and base cones. The cone has a large end and a small end, and the circles corresponding to the large end are respectively called a reference circle (the radius of the reference circle is r), an addendum circle, a dedendum circle and a base circle. The motion of a pair of bevel gears is equivalent to that of a pair of pitch cones which roll only.

According to a second aspect of the present application, there is provided a smart device comprising a gearing assembly provided in any of the above designs.

The intelligent device that this application provided, including the transmission assembly that any above-mentioned design provided, consequently have this transmission assembly's whole beneficial effect, no longer describe herein.

It is worth mentioning that the intelligent device comprises the intelligent robot, and the transmission assembly is applied to six axes of the wrist of the intelligent robot.

Additional aspects and advantages of the present application will be set forth in part in the description which follows, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a schematic structural diagram of a transmission assembly in one embodiment according to the present application;

FIG. 2 illustrates one of the partial structural schematics of the transmission assembly in accordance with one embodiment of the present application;

fig. 3 shows a second partial schematic view of the transmission assembly according to an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

100 transmission components, 101 first gears, 102 second gears, 104 transmission shafts, 106 third gears, 108 fourth gears, 110 first adjusting parts, 112 second adjusting parts, 114 shells, 116 first bearings, 118 first fasteners, 120 limiting protrusions, 122 second bearings, 124 elastic parts and 126 spacing rings.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

A drive assembly 100 and smart device provided in accordance with some embodiments of the present application are described below with reference to fig. 1-3.

According to a first aspect of the present application, there is provided a transmission assembly 100, as shown in fig. 1, fig. 2 and fig. 3, which includes a first gear 101, a second gear 102, a transmission shaft 104, a third gear 106, a fourth gear 108, a first adjusting member 110 and a second adjusting member 112, wherein the first gear 101 and the second gear 102 are engaged with each other, and a shaft hole is formed on the second gear 102. A portion of the propeller shaft 104 extends into the shaft hole and is splined to the second gear 102. The third gear 106 is engaged with the fourth gear 108, and the third gear 106 is disposed at an end of the transmission shaft 104. The first adjusting member 110 is directly or indirectly disposed on the second gear 102, and the first adjusting member 110 can move the second gear 102 relative to the transmission shaft 104 to adjust a backlash between the second gear 102 and the first gear 101. A second adjustment member 112 is disposed directly or indirectly on the third gear 106, the second adjustment member 112 being capable of moving the third gear 106 relative to the second gear 102 to adjust the backlash between the third gear 106 and the fourth gear 108.

The present application provides a transmission assembly 100 that includes a first gear 101, a second gear 102, a transmission shaft 104, a third gear 106, a fourth gear 108, a first adjustment member 110, and a second adjustment member 112. The first gear 101 and the second gear 102 are meshed and connected, the second gear 102 is provided with a shaft hole, a part of the transmission shaft 104 extends into the shaft hole to be connected with the second gear 102 through splines, specifically, an inner spline is arranged on the inner wall of the shaft hole of the second gear 102, an outer spline is arranged on the outer surface of the transmission shaft 104, the second gear 102 and the transmission shaft 104 are matched with the outer spline through the inner spline to realize spline transmission, and namely, relative motion can occur in the axial direction between the second gear 102 and the transmission shaft 104. The spline connection can make the stress of the second gear 102 and the transmission shaft 104 relatively uniform. The first adjusting member 110 is directly or indirectly disposed on the second gear 102, and the first adjusting member 110 can drive the second gear 102 to move axially relative to the transmission shaft 104, so as to control a backlash between the second gear 102 and the first gear 101.

Further, a third gear 106 is engaged with a fourth gear 108, the third gear 106 is disposed at an end of the transmission shaft 104, and the third gear 106 and the transmission shaft 104 move synchronously. A second adjustment member 112 is disposed directly or indirectly on the third gear 106, the second adjustment member 112 being capable of moving the third gear 106 relative to the second gear 102 to adjust the backlash between the third gear 106 and the fourth gear 108.

The second gear 102 and the third gear 106 are disposed on the transmission shaft 104, the second gear 102 is movably connected to the transmission shaft 104, the third gear 106 is fixedly connected to the transmission shaft 104, and the first adjusting member 110 and the second adjusting member 112 do not affect each other when adjusting the positions of the second gear 102 and the third gear 106, respectively. In other words, during the transmission of the transmission assembly 100, there are two meshing gear sets, for example, the first gear 101 and the second gear 102 constitute a primary gear set, and the third gear 106 and the fourth gear 108 constitute a secondary gear set. The ideal installation positions of the power input end and the power output end are limited to be fixed, namely, the position of one gear in the primary gear set and the secondary gear set is fixed, for example, the position of the first gear 101 as the power input end and the position of the fourth gear 108 as the power output end cannot be moved. The other gears of the primary gear set and the secondary gear set are coaxially arranged, for example, the second gear 102 and the third gear 106 are respectively arranged on the transmission shaft 104, and at this time, in order to ensure that the gear backlash of each stage of gear set is within a reasonable range, the positions of the two coaxially arranged gears, that is, the positions of the second gear 102 and the third gear 106, need to be adjusted, so as to achieve that the backlash of each stage of gear set meets the requirement.

Through setting up first regulating part 110, second regulating part 112 respectively in this application and independently adjusting the position of second gear 102 and third gear 106, adjust the axial position of second gear 102 and third gear 106 for the gear back clearance of every grade of gear train can both obtain reasonable adjustment, and then reduce or even eliminate the back clearance, satisfy the function of big reduction ratio and diversion, and easy operation, assembly efficiency also can obtain effectively promoting.

It is worth noting that during the transmission process, the first gear 101 is used as a power input end, and is transmitted through the second gear 102, the transmission shaft 104 and the third gear 106, and the fourth gear 108 is used as a power output end.

In one embodiment design, and further as shown in fig. 1 and 2, the transmission assembly 100 includes a housing 114 and a first bearing 116, the housing 114 having a receiving cavity in which at least a portion of the second gear 102 is located. The first bearing 116 is disposed on the second gear 102. Wherein a first portion of the first adjustment member 110 is in contact with the first bearing 116 and a second portion of the first adjustment member 110 is detachably disposed on the housing 114.

In this embodiment, the transmission assembly 100 includes a housing 114 and a first bearing 116, the housing 114 having a receiving cavity for receiving a portion of the first gear 101, a portion of the second gear 102, and a portion of the transmission shaft 104. A part of the first gear 101 extends into the receiving cavity and is in meshing connection with the second gear 102. The second gear 102 includes a support portion and gear teeth disposed on the support portion, the gear teeth are disposed on one axial side of the support portion to engage with the first gear 101, a shaft hole is disposed on the support portion, and the transmission shaft 104 penetrates through the middle of the second gear 102.

The first bearing 116 is sleeved on the second gear 102, the inner bearing ring of the first bearing 116 is engaged with the outer surface of the second gear 102, and the outer bearing ring of the first bearing 116 is engaged with the first adjusting member 110. Specifically, a first portion of the first adjusting member 110 may be engaged with an outer race of the first bearing 116, a second portion of the first adjusting member 110 may be detachably mounted on the housing 114, when the first adjusting member 110 is locked to the housing 114, the first adjusting member 110 may clamp the second gear 102 through the first bearing 116, and as the first adjusting member 110 is further locked, a backlash between the second gear 102 and the first gear 101 may be smaller and smaller.

In one embodiment design, further, as shown in fig. 1 and 2, the outer surface of the second gear 102 is provided with a mounting groove, and the first bearing 116 is located in the mounting groove.

In this embodiment, the second gear 102 includes a supporting portion and gear teeth, a mounting groove is formed between the supporting portion and the gear teeth, the first bearing 116 is sleeved on the supporting portion and contacts with the back surface of the gear teeth, and the front surface of the gear teeth is used for meshing connection with the first gear 101. By providing the mounting groove on the second gear 102, the first bearing 116 can be positioned and mounted, the mounting is facilitated, and the position stability of the first bearing 116 can also be ensured.

In one embodiment, the first bearing 116 is further an angular contact bearing. The angular contact bearing comprises a bearing inner ring, a bearing outer ring and a steel ball positioned between the bearing inner ring and the bearing outer ring, wherein a connecting line of contact points of the steel ball, the bearing inner ring and the bearing outer ring forms an angle with the radial direction. The angular contact bearing mainly bears larger unidirectional axial load, and the larger the contact angle is, the larger the load bearing capacity is.

In one embodiment design, further, as shown in fig. 1 and 2, the number of the first bearings 116 is at least two, and at least two first bearings 116 are stacked in the axial direction.

In this embodiment, the number of the first bearings 116 is at least two, the at least two first bearings 116 are arranged in an axial stack, and by arranging the at least two first bearings 116 on the second gear 102, the contact area between the second gear 102 and the first bearings 116 can be increased, so that the first adjusting member 110 better clamps the second gear 102 through the at least two first bearings 116.

Further, a portion of the first adjusting member 110 extends toward the rotation axis to form a partition portion, and the partition portion is located between two adjacent first bearings 116, so that not only can reliable structural support be provided for at least two first bearings 116 respectively, but also at least two first bearings 116 can be independent of each other and do not affect each other.

In one embodiment, as shown in fig. 1 and 2, the first adjusting member 110 is a supporting plate, the supporting plate is provided with an avoiding opening, and a portion of the second gear 102, the transmission shaft 104 and the first bearing 116 is located in the avoiding opening.

In this embodiment, the first adjusting member 110 is a supporting plate, and an avoiding opening is formed in the supporting plate, that is, the first adjusting member 110 is substantially in an annular structure, and can be sleeved on the transmission shaft 104 and the second gear 102, and the avoiding opening can ensure assemblability between the structures, so as to avoid correlation interference, and at the same time, the first adjusting member 110 can be conveniently installed, and the assembly efficiency is improved.

In one embodiment, the transmission assembly 100 further includes a first fastening member 118, and the first fastening member 118 is connected to the first bearing 116 and the second gear 102.

In this embodiment, the transmission assembly 100 further comprises a first fastener 118, the first fastener 118 being assembled to the second gear 102, the first fastener 118 being located on a side of the first bearing 116 facing away from the third gear 106, the first fastener 118 also enabling pre-assembly of a mid-section subassembly of the transmission assembly 100.

Specifically, the second gear 102, the at least two first bearings 116, the first adjusting member 110 and the first fastening member 118 may form a first pre-assembly, during the pre-assembly of the first pre-assembly, the first bearings 116 and the support plate are respectively sleeved on the second gear 102, when the number of the first bearings 116 is two, one first bearing 116 may be sleeved on the mounting groove of the second gear 102, the support plate is sleeved on the first bearing 116, and then the other first bearing 116 is sleeved on the second gear 102, at this time, since a portion of the support plate extends inward to form a separation portion, which is clamped between the two first bearings 116, the support plate and the second gear 102 can form an integral body, and finally, the first fastening member 118 is locked on the second bearing 122 until the first pre-assembly is completed, forming a one-piece structure.

Wherein the first fastening member 118 is a lock nut, it is conceivable that the outer surface of the second gear 102 is provided with a thread for the lock nut to be coupled.

In one embodiment design, further, as shown in fig. 1 and 2, the first gear 101 and the second gear 102 are hypoid gears.

In this embodiment, the first gear 101 and the second gear 102 are hypoid gears in meshing engagement, wherein the first gear 101 is a hypoid pinion and the second gear 102 is a hypoid gear.

The hypoid gear pair axis has offset distance, so that the transmission design and arrangement are more flexible, and the strength of the small wheel can be improved. The hypoid gear pair small wheel has a larger helical angle, so that a larger contact ratio is obtained when the hypoid gear pair small wheel is meshed with the hypoid gear pair small wheel, and the transmission is more stable. In the transmission process, the gear grinding machine can slide relatively along the tooth length direction and the tooth height direction, so that the tooth grinding manufacturability of the heat-treated workpiece is better. However, since the relative sliding is larger than that of the bevel gear, the possibility of occurrence of early wear is also large, and therefore care is taken to select the lubricating oil.

In one embodiment, as shown in fig. 1 and 3, the end of the transmission shaft 104 facing away from the third gear 106 is provided with an external thread. The second adjustment member 112 includes a second fastener disposed at the external thread.

In this embodiment, the end of the drive shaft 104 facing away from the third gear 106 is provided with an external thread. The second adjusting part 112 comprises a second fastener, the second fastener is arranged at the external thread, that is, the second adjusting part 112 can be locked on the transmission shaft 104, in the locking process of the second adjusting part 112, the transmission shaft 104 can drive the third gear 106 to move in the axial direction, so that the backlash between the third gear 106 and the fourth gear 108 can be reduced or eliminated, and the operation is convenient and fast.

In one embodiment, further, as shown in fig. 1 and 3, a portion of the transmission shaft 104 extends away from the central axis to form a limit protrusion 120, and the third gear 106 is connected to the limit protrusion 120.

In this embodiment, a portion of the transmission shaft 104 extends away from the central axis, that is, a portion of the transmission shaft 104 protrudes outward to form a limiting protrusion 120, and the third gear 106 is sleeved on the transmission shaft 104 and can be connected with the limiting protrusion 120 in a matching manner, so that the positioning and installation of the third gear 106 are realized, and the position stability of the third gear 106 is ensured.

In one embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes a second bearing 122, the second bearing 122 is disposed on the transmission shaft 104, and the second bearing 122 is located on a side of the limit protrusion 120 facing away from the third gear 106.

In this embodiment, the transmission assembly 100 further includes a second bearing 122, the second bearing 122 is disposed on the transmission shaft 104, the second bearing 122 is located on a side of the limit protrusion 120 away from the third gear 106, and the second bearing 122 can assist the transmission shaft 104 to move in the axial direction, so that the transmission shaft 104 moves more stably.

Here, for the limit projection 120, the third gear 106 and the second bearing 122 are located on both axial sides thereof, respectively.

In an embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes an elastic member 124, the elastic member 124 is disposed on the transmission shaft 104, and the elastic member 124 is located between the second gear 102 and the third gear 106.

In this embodiment, the transmission assembly 100 further includes an elastic member 124, the elastic member 124 is disposed on the transmission shaft 104, the elastic member 124 is disposed between the second gear 102 and the third gear 106, when the second fastening member is locked on the transmission shaft 104, the positions of the transmission shaft 104 and the third gear 106 can be adjusted under the action of the elastic member 124, so as to reduce the backlash between the third gear 106 and the fourth gear 108, and finally, the second fastening member is fixed on the transmission shaft 104, so as to complete the overall adjustment.

Specifically, the elastic member 124 is a belleville spring.

In one embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes a spacer ring 126, the spacer ring 126 is movably disposed on the transmission shaft 104, and the spacer ring 126 is disposed between the elastic member 124 and the second bearing 122.

In this embodiment, the transmission assembly 100 further includes a spacer ring 126, the spacer ring 126 is movably sleeved on the transmission shaft 104, and the spacer ring 126 is located between the elastic member 124 and the second bearing 122. The spacer ring 126 can ensure the axial height between the third gear 106 and the second gear 102, so that there is enough axial space between the second gear 102 and the third gear 106 to facilitate the matching of the first gear 101 and the second gear 102.

In the axial direction, for the transmission shaft 104, the second gear 102, the elastic element 124, the spacer 126, the second bearing 122 and the third gear 106 are sequentially sleeved.

Further, one side of the second bearing 122, which is away from the limiting convex part 120, is further provided with a clamp spring, the clamp spring is in interference fit with the transmission shaft 104, and under the action of the clamp spring and the limiting convex part 120, the position stability of the second bearing 122 is better.

Specifically, the second bearing 122, the snap spring, the spacer ring 126, the elastic member 124, the third gear 106 and the transmission shaft 104 may form a second pre-assembly, and during the pre-assembly process of the second pre-assembly, first, the third gear 106 and the transmission shaft 104 may be cooperatively connected, and then the second bearing 122, the snap spring, the spacer ring 126 and the elastic member 124 are sequentially sleeved on the transmission shaft 104 to form the second pre-assembly.

Then, the second subassembly is inserted into the axial bore of the second gear 102 of the first subassembly to effect a splined connection between the drive shaft 104 and the second gear 102, and then secured by a second fastener.

Further, the first subassembly and the second subassembly are assembled into the housing 114, the position of the second gear 102 is adjusted by rotating the first adjustment member 110 to reduce backlash between the second gear 102 and the first gear 101, and the first adjustment member 110 is bolted to the housing 114 after adjustment, thereby completing the positional adjustment of the primary gearset. Subsequently, the adjustment can be completed by adjusting the second fastening member, adjusting the position of the third gear 106 to reduce the backlash under the action of the elastic member 124, and then fixing the second fastening member.

In one embodiment, the second bearing 122 is further a roller bearing.

In this embodiment, the roller bearing is one of rolling bearings, which is one of the widely used components in modern machinery. It relies on rolling contact between the primary elements to support the rotating parts. Roller bearings are now mostly standardized. The roller bearing has the advantages of small moment required by starting, high rotation precision, convenience in selection and the like. Specifically, the second bearing 122 is a cylindrical roller bearing.

In one embodiment design, further, as shown in fig. 1 and 3, the third gear 106 and the fourth gear 108 are bevel gears.

In this embodiment, the third gear 106 and the fourth gear 108 are bevel gears for transmitting motion and power between two intersecting axes, and in general machines, the angle of intersection between two axes of the bevel gears is equal to 90 °, but may not be equal to 90 °. Like cylindrical gears, bevel gears have reference cones, addendum cones, dedendum cones, and base cones. The cone has a large end and a small end, and the circles corresponding to the large end are respectively called reference circles, and the radiuses of the reference circles are r, addendum circles, dedendum circles and base circles. The motion of a pair of bevel gears is equivalent to that of a pair of pitch cones which roll only.

According to a second aspect of the present application, there is provided a smart device comprising a drive assembly 100 as provided by any of the above-described designs.

The smart device provided by the present application includes the transmission assembly 100 provided by any of the above designs, so that the smart device has all the advantages of the transmission assembly 100, and the details are not repeated herein.

It is worth mentioning that the smart device comprises a smart robot, and the transmission assembly 100 is applied to six axes of the wrist of the smart robot.

Specifically, as shown in fig. 1, 2 and 3, the present application provides a transmission assembly 100 including a first gear 101, a second gear 102, a transmission shaft 104, a third gear 106, a fourth gear 108, a first adjustment member 110 and a second adjustment member 112. The first gear 101 and the second gear 102 are meshed and connected, the second gear 102 is provided with a shaft hole, a part of the transmission shaft 104 extends into the shaft hole to be connected with the second gear 102 through splines, specifically, an inner spline is arranged on the inner wall of the shaft hole of the second gear 102, an outer spline is arranged on the outer surface of the transmission shaft 104, the second gear 102 and the transmission shaft 104 are matched with the outer spline through the inner spline to realize spline transmission, and namely, relative motion can occur in the axial direction between the second gear 102 and the transmission shaft 104. The spline connection can make the stress of the second gear 102 and the transmission shaft 104 relatively uniform. The first adjusting member 110 is directly or indirectly disposed on the second gear 102, and the first adjusting member 110 can drive the second gear 102 to move axially relative to the transmission shaft 104, so as to control a backlash between the second gear 102 and the first gear 101.

Further, a third gear 106 is engaged with a fourth gear 108, the third gear 106 is disposed at an end of the transmission shaft 104, and the third gear 106 and the transmission shaft 104 move synchronously. A second adjustment member 112 is disposed directly or indirectly on the third gear 106, the second adjustment member 112 being capable of moving the third gear 106 relative to the second gear 102 to adjust the backlash between the third gear 106 and the fourth gear 108.

The second gear 102 and the third gear 106 are disposed on the transmission shaft 104, the second gear 102 is movably connected to the transmission shaft 104, the third gear 106 is fixedly connected to the transmission shaft 104, and the first adjusting member 110 and the second adjusting member 112 do not affect each other when adjusting the positions of the second gear 102 and the third gear 106, respectively. In other words, during the transmission of the transmission assembly 100, there are two meshing gear sets, for example, the first gear 101 and the second gear 102 constitute a primary gear set, and the third gear 106 and the fourth gear 108 constitute a secondary gear set. The ideal installation positions of the power input end and the power output end are limited to be fixed, namely, the position of one gear in the primary gear set and the secondary gear set is fixed, for example, the position of the first gear 101 as the power input end and the position of the fourth gear 108 as the power output end cannot be moved. The other gears of the primary gear set and the secondary gear set are coaxially arranged, for example, the second gear 102 and the third gear 106 are respectively arranged on the transmission shaft 104, and at this time, in order to ensure that the gear backlash of each stage of gear set is within a reasonable range, the positions of the two coaxially arranged gears, that is, the positions of the second gear 102 and the third gear 106, need to be adjusted, so as to achieve that the backlash of each stage of gear set meets the requirement.

Through setting up first regulating part 110, second regulating part 112 respectively in this application and independently adjusting the position of second gear 102 and third gear 106, adjust the axial position of second gear 102 and third gear 106 for the gear back clearance of every grade of gear train can both obtain reasonable adjustment, and then reduce or even eliminate the back clearance, satisfy the function of big reduction ratio and diversion, and easy operation, assembly efficiency also can obtain effectively promoting.

In one embodiment design, further, as shown in fig. 1 and 2, the transmission assembly 100 includes a housing 114 and a first bearing 116, the housing 114 having a receiving cavity for receiving a portion of the first gear 101, a portion of the second gear 102, and a portion of the transmission shaft 104. A part of the first gear 101 extends into the accommodating cavity and is in meshing connection with the second gear 102. The second gear 102 includes a support portion and gear teeth disposed on the support portion, the gear teeth are disposed on one axial side of the support portion to engage with the first gear 101, a shaft hole is disposed on the support portion, and the transmission shaft 104 penetrates through the middle of the second gear 102.

The first bearing 116 is sleeved on the second gear 102, the inner bearing ring of the first bearing 116 is engaged with the outer surface of the second gear 102, and the outer bearing ring of the first bearing 116 is engaged with the first adjusting member 110. Specifically, a first portion of the first adjusting member 110 may be engaged with an outer race of the first bearing 116, a second portion of the first adjusting member 110 may be detachably mounted on the housing 114, when the first adjusting member 110 is locked to the housing 114, the first adjusting member 110 may clamp the second gear 102 through the first bearing 116, and as the first adjusting member 110 is further locked, a backlash between the second gear 102 and the first gear 101 may be smaller and smaller.

In one embodiment, further, as shown in fig. 1 and 2, the number of the first bearings 116 is at least two, the at least two first bearings 116 are arranged in an axial stack, and by arranging the at least two first bearings 116 on the second gear 102, the contact area between the second gear 102 and the first bearings 116 can be increased, so that the first adjusting member 110 better clamps the second gear 102 through the at least two first bearings 116.

Further, a portion of the first adjusting member 110 extends toward the rotation axis to form a partition portion, and the partition portion is located between two adjacent first bearings 116, so that not only can reliable structural support be provided for at least two first bearings 116 respectively, but also at least two first bearings 116 can be independent of each other and do not affect each other.

In the design of an embodiment, as shown in fig. 1 and fig. 2, the first adjusting member 110 is a supporting plate, and an avoiding opening is formed in the supporting plate, that is, the first adjusting member 110 is substantially in a ring-shaped structure and can be sleeved on the transmission shaft 104 and the second gear 102, and the avoiding opening can ensure assemblability between the structures, avoid relevant interference, and facilitate installation of the first adjusting member 110, thereby improving assembly efficiency.

In one embodiment, further, the transmission assembly 100 further includes a first fastening member 118, the first fastening member 118 is assembled on the second gear 102, the first fastening member 118 is located on a side of the first bearing 116 facing away from the third gear 106, and the first fastening member 118 also enables pre-assembly of a middle subassembly of the transmission assembly 100.

Specifically, the second gear 102, the at least two first bearings 116, the first adjusting member 110 and the first fastening member 118 may form a first pre-assembly, during the pre-assembly of the first pre-assembly, the first bearings 116 and the support plate are respectively sleeved on the second gear 102, when the number of the first bearings 116 is two, one first bearing 116 may be sleeved on the mounting groove of the second gear 102, the support plate is sleeved on the first bearing 116, and the other first bearing 116 is sleeved on the second gear 102, at this time, since a portion of the support plate extends inward to form a partition part which is clamped between the two first bearings 116, the support plate and the second gear 102 can form an integral body, and finally, the first fastening member 118 is locked on the second bearing 122 until the pre-assembly of the first pre-assembly is completed, forming a one-piece structure.

In one embodiment design, further, as shown in fig. 1 and 2, the first gear 101 and the second gear 102 are meshing-mated hypoid gears, wherein the first gear 101 is a hypoid pinion and the second gear 102 is a hypoid bull gear.

In one embodiment, as shown in fig. 1 and 3, the end of the transmission shaft 104 facing away from the third gear 106 is provided with an external thread. The second adjusting part 112 comprises a second fastener, the second fastener is arranged at the external thread, that is, the second adjusting part 112 can be locked on the transmission shaft 104, in the locking process of the second adjusting part 112, the transmission shaft 104 can drive the third gear 106 to move in the axial direction, so that the backlash between the third gear 106 and the fourth gear 108 can be reduced or eliminated, and the operation is convenient and fast.

In an embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes a second bearing 122, the second bearing 122 is disposed on the transmission shaft 104, the second bearing 122 is located on a side of the limiting protrusion 120 facing away from the third gear 106, and the second bearing 122 can assist the transmission shaft 104 to move in the axial direction, so that the movement of the transmission shaft 104 is more stable.

In an embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes an elastic member 124, the elastic member 124 is sleeved on the transmission shaft 104, the elastic member 124 is located between the second gear 102 and the third gear 106, when the second fastening member is locked on the transmission shaft 104, under the action of the elastic member 124, the positions of the transmission shaft 104 and the third gear 106 can be adjusted, so as to reduce the backlash between the third gear 106 and the fourth gear 108, and finally, the second fastening member is fixed on the transmission shaft 104, so as to complete the overall adjustment.

In one embodiment, as shown in fig. 1 and 3, the transmission assembly 100 further includes a spacer ring 126, the spacer ring 126 is movably disposed on the transmission shaft 104, and the spacer ring 126 is disposed between the elastic member 124 and the second bearing 122. The spacer ring 126 can ensure the axial height between the third gear 106 and the second gear 102, so that there is enough axial space between the second gear 102 and the third gear 106 to facilitate the matching of the first gear 101 and the second gear 102.

In the axial direction, for the transmission shaft 104, the second gear 102, the elastic member 124, the spacer ring 126, the second bearing 122 and the third gear 106 are sequentially sleeved.

Further, one side of the second bearing 122, which is away from the limiting convex part 120, is further provided with a clamp spring, the clamp spring is in interference fit with the transmission shaft 104, and under the action of the clamp spring and the limiting convex part 120, the position stability of the second bearing 122 is better.

Specifically, the second bearing 122, the snap spring, the spacer ring 126, the elastic member 124, the third gear 106 and the transmission shaft 104 may form a second pre-assembly, and during the pre-assembly process of the second pre-assembly, first, the third gear 106 and the transmission shaft 104 may be cooperatively connected, and then the second bearing 122, the snap spring, the spacer ring 126 and the elastic member 124 are sequentially sleeved on the transmission shaft 104 to form the second pre-assembly.

Then, the second subassembly is inserted into the axial bore of the second gear 102 of the first subassembly to effect a splined connection between the drive shaft 104 and the second gear 102, and then secured by a second fastener.

Further, the first subassembly and the second subassembly are assembled into the housing 114, the position of the second gear 102 is adjusted by rotating the first adjustment member 110 to reduce backlash between the second gear 102 and the first gear 101, and the first adjustment member 110 is bolted to the housing 114 after adjustment, thereby completing the positional adjustment of the primary gearset. Subsequently, the adjustment can be completed by adjusting the second fastening member, adjusting the position of the third gear 106 to reduce the backlash under the action of the elastic member 124, and then fixing the second fastening member.

In this application, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (15)

1. A drive assembly, comprising:

the first gear and the second gear are in meshed connection, and a shaft hole is formed in the second gear;

a part of the transmission shaft extends into the shaft hole and is in spline connection with the second gear;

the third gear and the fourth gear are in meshed connection, and the third gear is arranged at the end part of the transmission shaft;

the first adjusting piece is directly or indirectly arranged on the second gear, and can enable the second gear to move relative to the transmission shaft so as to adjust the backlash between the second gear and the first gear;

a second adjustment member disposed directly or indirectly on the third gear, the second adjustment member being capable of moving the third gear relative to the second gear to adjust a backlash between the third gear and the fourth gear.

2. The drive assembly of claim 1, wherein the drive assembly comprises:

a housing having a receiving cavity, at least a portion of the second gear being located within the receiving cavity;

a first bearing disposed on the second gear;

wherein a first portion of the first adjuster is in contact with the first bearing and a second portion of the first adjuster is detachably disposed on the housing.

3. The drive assembly of claim 2,

the outer surface of the second gear is provided with a mounting groove, and the first bearing is located in the mounting groove.

4. The drive assembly of claim 2,

the first bearing is an angular contact bearing; and/or

The number of the first bearings is at least two, and at least two first bearings are stacked in the axial direction.

5. The drive assembly of claim 2,

the first adjusting piece is a supporting plate, an avoiding opening is formed in the supporting plate, and the second gear, the transmission shaft and a part of the first bearing are located in the avoiding opening.

6. The drive assembly of claim 5, further comprising:

a first fastener connected with the first bearing and the second gear.

7. The drive assembly of claim 1,

the first and second gears are hypoid gears.

8. Transmission assembly according to any of claims 1 to 7,

the end part of the transmission shaft, which deviates from the third gear, is provided with an external thread;

the second adjustment member includes a second fastener disposed at the external thread.

9. The drive assembly of claim 8,

one part of the transmission shaft deviates from the central axis and extends to form a limiting convex part, and the third gear is connected with the limiting convex part in a matched mode.

10. The drive assembly of claim 9, further comprising:

and the second bearing is arranged on the transmission shaft and is positioned on one side of the limit convex part, which deviates from the third gear.

11. The drive assembly of claim 10, further comprising:

and the elastic piece is sleeved on the transmission shaft and is positioned between the second gear and the third gear.

12. The drive assembly of claim 11, further comprising:

the spacer ring is movably sleeved on the transmission shaft and is positioned between the elastic piece and the second bearing.

13. The drive assembly of claim 10,

the second bearing is a roller bearing.

14. The drive assembly of claim 8,

the third gear and the fourth gear are bevel gears.

15. A smart device, comprising: a drive assembly as claimed in any one of claims 1 to 14.

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