CN209245179U

CN209245179U - Speed reducer

Info

Publication number: CN209245179U
Application number: CN201821870504.9U
Authority: CN
Inventors: 钟克育; 林钧伟; 郑旭珉
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2019-08-13
Anticipated expiration: 2028-11-14

Abstract

The utility model is a kind of speed reducer, by the locking force of screw piece, the top outer ring surface of the positioning inner ring surface and hollow shaft that make bearing inner ring carries out torsion drive with conical ring face fit system, assembly precision can not only be made to be promoted, the function of transmitting torsion can be also provided, when the flexibility external tooth cup stress is more than maximum rated load, the transmitting torsion of the output shaft of flexible external tooth cup can fail moment, the phenomenon that making output shaft generate momentary slip, output shaft can dally in being formed in hollow shaft, the inner body of speed reducer is effectively protected, avoid there is a situation where slow down crumble, and then increase service life.

Description

Speed reducer

Technical field

The utility model is related with speed reducer, in particular to a kind of deceleration for the part being effectively protected inside speed reducer Machine.

Background technique

As shown in Figure 1A, the sectional view of the harmonic wave speed reducing machine of a prior art is shown.Wherein, the harmonic wave speed reducing machine is one Kind has the deceleration device of high reduction ratio, mainly includes rigid internal gear 1 in structure configuration, is set in rigid internal gear 1 Flexible external tooth cup 2, the baud generator 3 that is rotatably arranged in flexible external tooth cup 2, when baud generator 3 is assembled in flexible external tooth After cup 2, flexible external tooth cup 2 can be become ellipse by outer peripheral edge institute's ejection of baud generator 3, as a result, when baud generator 3 by To power source driving and when rotating, can be complete at the long axis of baud generator 3 between rigid internal gear 1 and flexible external tooth cup 2 Full occlusion, and can be dragged away from completely at the section axis of baud generator 3, due to having the number of teeth between rigid internal gear 1 and flexible external tooth cup 2 Difference easily, so this number of teeth difference just can achieve the effect that high reduction ratio when baud generator 3 persistently rotates, so Generate the output of high torque.

However, the flexible external tooth cup 2 of existing harmonic wave speed reducing machine is integrally formed with output shaft 4, force way completely by The ontology support of the teeth portion of flexible external tooth cup 2 and flexible external tooth cup 2, when flexible 2 stress of external tooth cup is more than maximum rated load, The case where bottom of flexible external tooth cup 2 is easy to happen torsional deflection, leads to fracture, keeps the harmonic wave speed reducing machine entirely ineffective, and It can not repair.

As shown in Figure 1B, Japan Patent (JP20140234341) wherein schema is shown.The patent document is a kind of harmonic wave Geared system, the harmonic gear drive are that bump geometry is withstood using the spring force of spring 5 to reach torsion limitation effect Fruit, in this way, working as the harmonic gear drive after a period of use, spring 5 is easy to produce elastic fatigue and fails.

Utility model content

The utility model provides a kind of speed reducer, and main purpose is the part being effectively protected inside speed reducer, avoids There is a situation where slow down and crumble.

For up to foregoing purpose, a kind of speed reducer of the utility model includes: shell has an accommodating space；Rigid gear, It is set to the accommodating space, and there are multiple internal tooths；Flexible external tooth cup positioned at the accommodating space and is set to the rigidity In gear, and with multiple external tooths for being engaged in the multiple internal tooth and protrudes out the shell and there is output shaft end face Output shaft；Baud generator is rotatably set in the flexible external tooth cup；Input shaft places the baud generator, and drives Move the baud generator rotation；Sized cross roller bearings have and are installed in the outer race of the shell and relative to the bearing The bearing inner ring that outer ring pivots, it is in ramp-like positioning inner ring surface that the bearing inner ring, which has one,；Hollow shaft is placed on the flexibility The output shaft of external tooth cup, and have with the positioning inner ring surface top system and in ramp-like top outer ring surface and internal thread hole；With And screw piece, spiral shell is set to the internal thread hole, and has against the screw end face of the output shaft end face.

Preferably, wherein the screw end face be conical surface shape, the output shaft end face be it is planar, the screw end face with The output shaft end face is in point contact.

Preferably, wherein the screw end face be it is planar, the output shaft end face be conical surface shape, the screw end face with The output shaft end face is in point contact.

Preferably, wherein further include a ball, the ball between the screw end face and the output shaft end face, The groove of described recessed described ball one end of accommodating in output shaft end face.

The effect of the utility model, is: by the locking force of screw piece, make the positioning inner ring surface of bearing inner ring with it is hollow The top outer ring surface of axis carries out torsion drive with conical ring face fit system, assembly precision can not only be made to be promoted, can also provide transmitting The function of torsion, when stress is more than maximum rated load, the transmitting torsion of the output shaft of flexible external tooth cup can fail moment, The phenomenon that making output shaft generate momentary slip, output shaft can be effectively protected speed reducer in forming idle running in hollow shaft Inner body is avoided there is a situation where slowing down to crumble, and then increases service life.

Detailed description of the invention

Figure 1A is the sectional view of prior art harmonic wave speed reducing machine；

Figure 1B Japan Patent (JP20140234341) wherein schema；

Fig. 2 is the sectional structure chart (one) of the utility model embodiment 1；

Fig. 3 is the sectional structure chart (two) of the utility model embodiment 1, shows the screw end face of screw piece against output shaft The output shaft end face in portion；

Fig. 4 is the sectional structure chart of the utility model embodiment 2；

Fig. 5 is the sectional structure chart of the utility model embodiment 3.

Sign flag illustrates in attached drawing:

The prior art:

Flexible 2 baud generator 3 of external tooth cup of rigid internal gear 1

4 spring 5 of output shaft

The utility model:

20 accommodating space of shell, 21 rigid gear 30

Flexible 40 external tooth 41 of external tooth cup of internal tooth 31

42 output shaft end face of output shaft, 421 groove 4211

43 baud generator of inner cup portion, 50 input shaft 60

70 outer race of sized cross roller bearings, 71 bearing inner ring 72

Position 721 roller of inner ring surface, 73 hollow shaft 80

Push up 81 internal thread hole of outer ring surface, 82 screw piece 90 processed

Screw end face 91 loads 100 balls 110

Specific embodiment

The technical solution to utility model is subjected to clear, complete description below, it is clear that described embodiment is this A part of the embodiment of utility model, instead of all the embodiments.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without making creative work, belongs to utility model protection Range.

Embodiment 1:

The utility model provides a kind of speed reducer, as shown in Figure 2 and Figure 3, mainly includes: shell 20, rigid gear 30, Flexible external tooth cup 40, baud generator 50, input shaft 60, sized cross roller bearings 70, hollow shaft 80 and screw piece 90, in which:

Shell 20 has an accommodating space 21；

Rigid gear 30 is set to accommodating space 21, and has multiple internal tooths 31；

Flexible external tooth cup 40 positioned at accommodating space 21 and is set in rigid gear 30, and is had described in multiple be engaged in The external tooth 41 of multiple internal tooths 31 and protrude out shell 20 and with output shaft end face 421 output shaft 42；Wherein, flexible outer The output shaft 42 of tooth cup 40 and the inner cup portion 43 of flexible external tooth cup 40 are integrally formed, and force way is completely by flexible external tooth cup The inner cup portion 43 of 40 external tooth 41 and flexible external tooth cup 40 supports；

Baud generator 50 is rotatably set in flexible external tooth cup 40；

Input shaft 60 places baud generator 50, and baud generator 50 is driven to rotate.

It should be noted that the rigid gear 30 of the speed reducer, flexible external tooth cup 40 and baud generator 50 are all existing skill The component of art, and it makees that flowing mode is all same as the prior art, the also creation emphasis of non-the utility model, therefore for the equal structures The detailed section structure of part with make flowing mode and be no longer described in detail.

Sized cross roller bearings 70 have the outer race 71 for being installed in shell 20 and relative to the pivot of outer race 71 Bearing inner ring 72, it is in ramp-like positioning inner ring surface 721 that bearing inner ring 72, which has,；Specifically, outer race 71 and bearing inner ring Multiple rollers 73 are equipped between 72；

Hollow shaft 80, is placed on the output shaft 42 of flexible external tooth cup 40, and have with the positioning inner ring surface 721 push up system and In ramp-like top outer ring surface 81 and internal thread hole 82；

Screw piece 90, spiral shell is set to internal thread hole 82, and has against the screw end face 91 of output shaft end face 421.

The above is the configuration explanation of each main member of the utility model embodiment.As for the actuation of the utility model Mode, that is, effect is described as follows:

As shown in Figure 2 to Figure 3, screw end face 91 be conical surface shape, output shaft end face 421 be it is planar, by 90 spiral shell of screw piece It is connected in internal thread hole 82, and is in point contact screw end face 91 by being butted on output shaft end face 421, at this point, 80 meeting of hollow shaft To left dislocation, make the top outer ring surface 81 processed of hollow shaft 80 that can push up the positioning inner ring surface 721 of bearing inner ring 72 processed, meanwhile, hollow shaft One end of 80 separate top outer ring surface 81 is gripped by a load 100, when stress is more than maximum rated load, due in One end of empty axis 80 is supported 100 and grips, and the transmitting torsion of the output shaft 42 of flexible external tooth cup 40 can fail moment, makes Output shaft 42 generates the phenomenon that momentary slip, thus output shaft 42 can be effectively protected in forming idle running in hollow shaft 80 The inner body of speed reducer avoids there is a situation where slowing down, crumbling, and then increases service life.Wherein, the locking of screw piece 90 Torque (N-m) and braking torque (N-m) are proportional, by the locking force of screw piece 90, make the positioning inner ring surface of bearing inner ring 72 721 carry out torsion drive with the top outer ring surface 81 of hollow shaft 80 with conical ring face fit system, assembly precision can not only be made to be promoted, The function of transmitting torsion can be also provided.

Embodiment 2:

A kind of speed reducer provided by the utility model, as shown in figure 4, it mainly includes: shell 20, is scratched at rigid gear 30 Property external tooth cup 40, baud generator 50, input shaft 60, sized cross roller bearings 70, hollow shaft 80 and screw piece 90, difference It is:

The screw end face 91 of screw piece 90 be it is planar, the output shaft end face 421 of output shaft 42 is conical surface shape, screw end Face 91 is in point contact with output shaft end face 421；As a result, using screw piece 90 adjust precompressed, make rub torsion can be adjusted, when by When power is more than maximum rated load, transmission failure occurs for output shaft 42, reaches the part being effectively protected inside speed reducer Purpose, remaining structure, configuration and effect are same as the previously described embodiments.

Embodiment 3:

A kind of speed reducer provided by the utility model, as shown in figure 5, it mainly includes: shell 20, is scratched at rigid gear 30 Property external tooth cup 40, baud generator 50, input shaft 60, sized cross roller bearings 70, hollow shaft 80 and screw piece 90, difference It is:

The utility model also includes a ball 110, and ball 110 is between screw end face 91 and output shaft end face 421, spiral shell Silk end face 91 is planar, the groove 4211 of accommodating 110 one end of ball of output shaft end face 421 recessed one；As a result, ball 110 with The screw end face 91 of screw piece 90 is in point contact, and output shaft 42 drives ball 110 to form idle running in hollow shaft 80, works as stress When more than maximum rated load, transmission failure occurs for output shaft 42, reaches the part being effectively protected inside speed reducer Purpose, remaining structure, configuration and effect are same as the previously described embodiments.

It is unpractical to limit in conclusion the various embodiments described above are only the preferred embodiment of utility model Novel protection scope, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It all should include within the protection scope of the present utility model.

Claims

1. a kind of speed reducer, characterized by comprising:

Shell has an accommodating space；

Rigid gear is set to the accommodating space, and has multiple internal tooths；

Flexible external tooth cup positioned at the accommodating space and is set in the rigid gear, and have it is multiple be engaged in it is described more The external tooth of a internal tooth and protrude out the shell and with output shaft end face output shaft；

Baud generator is rotatably set in the flexible external tooth cup；

Input shaft places the baud generator, and drives the baud generator rotation；

Sized cross roller bearings, the bearing that there is the outer race for being installed in the shell and pivoted relative to the outer race Inner ring, it is in ramp-like positioning inner ring surface that the bearing inner ring, which has,；

Hollow shaft, is placed on the output shaft of the flexible external tooth cup, and has with the positioning inner ring surface top system and in ramp-like Top outer ring surface and internal thread hole；

Screw piece, spiral shell is set to the internal thread hole, and has against the screw end face of the output shaft end face.

2. speed reducer according to claim 1, which is characterized in that the screw end face is conical surface shape, the output shaft end Face be it is planar, the screw end face is in point contact with the output shaft end face.

3. speed reducer according to claim 1, which is characterized in that the screw end face is planar, the output shaft end Face is conical surface shape, and the screw end face is in point contact with the output shaft end face.

4. speed reducer according to claim 1, which is characterized in that include a ball, the ball is against the screw end Between face and the output shaft end face, the groove of described recessed described ball one end of accommodating in output shaft end face.