CN221921834U

CN221921834U - Worm Gear Reducer

Info

Publication number: CN221921834U
Application number: CN202420771840.7U
Authority: CN
Inventors: 彭晨栩; 暨伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-04-15
Filing date: 2024-04-15
Publication date: 2024-10-29
Anticipated expiration: 2034-04-15

Abstract

The worm and gear speed reducer comprises a shell, wherein a worm assembly, a worm wheel shaft assembled in the shell through a bearing and a worm wheel assembly coaxially arranged on the worm wheel shaft are arranged in the shell, and the worm and gear speed reducer is characterized in that: the worm wheel assembly comprises a retainer assembly detachably arranged on the worm wheel shaft and a cylindrical pin which is in a cylindrical shape, is detachably arranged on the retainer assembly and is positioned at the periphery of the worm wheel shaft at uniform intervals to be meshed with the worm assembly. According to the utility model, the cylindrical pins can be detached and replaced, the cylindrical pins are replaced periodically after long-time use, so that the meshing gap is in a set range, the cylindrical pins are positioned on the periphery of the worm wheel shaft through the retainer component, the positioning reliability is high, the structure is stable and reliable, the transmission stability and accuracy of the worm wheel and worm pair are ensured, the transmission reliability of the worm wheel and worm speed reducer is improved, and the service life of the worm wheel and worm speed reducer is prolonged.

Description

Worm gear reducer

Technical Field

The utility model relates to a worm gear reducer, and belongs to the technical field of assembly structures of worm gear reducers.

Background

The worm gear has the characteristics of large transmission ratio, stable operation, low noise and high rigidity of a transmission chain, has self-locking property, and is widely applied to various machines, such as a numerical control turntable, a robot joint speed reducer, a numerical control speed reducer and the like. The speed reducer consists of a box body and a worm wheel and a worm which are meshed with each other; the worm gear pair belongs to sliding contact, and when power is transmitted, the friction loss of a tooth surface is large, the abrasion phenomenon is easy to occur after long-term work, so that the meshing clearance of the worm gear is increased, the transmission stability and the transmission precision are easy to influence, the worm is caused to swing up and down due to the change of radial force, abnormal noise is generated, and the transmission reliability is reduced. The existing method is that gap adjusting mechanisms are arranged at two ends of a worm and used for controlling meshing gaps of the worm and the worm, but the too large gaps can affect transmission precision and accelerate abrasion after being adjusted, or nylon worm wheels with lubricating functions are adopted to form anti-friction protection, but mutual abrasion of worm and worm meshing teeth in the working process is unavoidable and irreversible. From a large number of experiments, the worm gear tooth meshing lubricating performance is improved on the basis of conventional design, the material and processing precision of parts are changed, only wear can be delayed, but the expected aim of ensuring the transmission stability and precision is not achieved, and the service life of the worm gear reducer is influenced.

Disclosure of utility model

According to the worm gear reducer, the cylindrical pins can be detached and replaced, the cylindrical pins are replaced periodically after long-time use, so that the meshing gap is in a set range, the cylindrical pins are positioned on the periphery of the worm wheel shaft through the retainer component, the positioning reliability is high, the structure is stable and reliable, the transmission stability and accuracy of a worm gear pair are guaranteed, the transmission reliability of the worm gear reducer is improved, and the service life of the worm gear reducer is prolonged.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The worm and gear speed reducer comprises a shell, wherein a worm assembly, a worm wheel shaft assembled in the shell through a bearing and a worm wheel assembly coaxially arranged on the worm wheel shaft are arranged in the shell, and the worm and gear speed reducer is characterized in that: the worm wheel assembly comprises a retainer assembly detachably arranged on the worm wheel shaft and a cylindrical pin which is in a cylindrical shape, is detachably arranged on the retainer assembly and is positioned at the periphery of the worm wheel shaft at uniform intervals to be meshed with the worm assembly.

Preferably, the worm wheel shaft comprises a middle section and extending sections which are integrally formed at two ends of the middle section and extend out of the shell, the outer diameter of the middle section is larger than that of the extending sections, the cylindrical pins are uniformly distributed on the periphery of the middle section, the retainer components are sleeved on the extending sections and detachably connected with the middle section, and the cylindrical pins are clamped between the two groups of retainer components and are matched with the retainer components in a positioning mode.

Preferably, the retainer assembly comprises an outer gear ring and a retainer, wherein the inner diameter of the outer gear ring and the outer diameter of the outer gear ring are both larger than the outer diameter of the extension section, tooth grooves corresponding to cylindrical pins are formed in the outer edge of the outer gear ring, the outer gear ring is sleeved on the extension section and covers the end face of the middle section, the retainer is sleeved on the extension section and covers the outer gear ring, the end parts of the cylindrical pins extend into the tooth grooves and are positioned by the retainer, and the retainer and the outer gear ring are fixedly connected with the middle section through bolts.

Preferably, the outer edge of the retainer is provided with an annular edge with downward turnover degree, the end face of the cylindrical pin is abutted against the retainer, and the annular edge is contacted with the cylindrical pin.

Preferably, the worm wheel shaft is a hollow shaft, and the inner ring bearing is pressed in the extending section.

Preferably, the worm assembly comprises a worm meshed with the cylindrical pin, worm bearings pressed at two ends of the worm, and a bearing seat matched with the worm bearings, one end of the worm extends outwards from the bearing seat, kidney-shaped holes are formed in the bearing seat, connecting holes corresponding to the kidney-shaped holes one by one are formed in the shell, bolts penetrate through the kidney-shaped holes and are screwed in the connecting holes to mount the bearing seat on the shell, jackscrew bolts capable of adjusting meshing gaps between the worm and the cylindrical pin are screwed in the shell, and the jackscrew bolts are perpendicular to the worm and the inner ends of the jackscrew bolts are propped against the bearing seat.

The beneficial effects of the utility model are as follows:

The worm wheel assembly in the worm gear rod speed reducer comprises the retainer assembly and the cylindrical pins, wherein the cylindrical pins are uniformly and alternately positioned on the periphery of the worm wheel shaft and meshed with the worm assembly, the cylindrical pins are detachably arranged on the retainer assembly, the retainer assembly is detachably arranged on the worm wheel shaft, the cylindrical pins are periodically replaced after long-time use, so that the meshing gap is in a set range, the cylindrical pins are positioned on the periphery of the worm wheel shaft through the retainer assembly, the positioning reliability is high, the structure is stable and reliable, the transmission stability and the transmission precision of a worm gear pair are ensured, the transmission reliability of the worm gear rod speed reducer is improved, and the service life of the worm gear rod speed reducer is prolonged.

The jackscrew bolt is screwed into the shell, the bearing seat is jacked by the jackscrew bolt to move to adjust the meshing gap between the worm and the cylindrical pin, the cylindrical pin is replaced and/or the jackscrew bolt is screwed to adjust the meshing gap according to the abrasion condition in the use process of the speed reducer, the meshing gap is ensured to be always in a set range in the use process, the transmission stability and accuracy are maintained, and the practicability is high.

Drawings

Fig. 1 is a top view of a worm gear reducer in an embodiment.

Fig. 2 is an exploded view of the worm gear reducer.

FIG. 3 is a schematic diagram of a combination of a worm gear shaft and worm gear assembly.

Fig. 4 is a cross-sectional view of fig. 3.

Fig. 5 is an exploded view of fig. 3.

Detailed Description

Embodiments of the present utility model are described in detail below with reference to fig. 1 to 5.

The worm gear reducer comprises a shell 1, wherein a worm assembly 2, a worm wheel shaft 3 assembled in the shell 1 through a bearing and a worm wheel assembly 4 coaxially arranged on the worm wheel shaft 3 are arranged in the shell 1, and the worm gear reducer is characterized in that: the worm wheel assembly 4 includes a holder assembly 5 detachably mounted on the worm wheel shaft 3 and a cylindrical pin 6 having a cylindrical shape, the cylindrical pin 6 being detachably mounted on the holder assembly 5 and being positioned at the outer circumference of the worm wheel shaft 3 to be engaged with the worm assembly 2 at uniform intervals.

The worm wheel assembly 4 in the worm gear rod speed reducer comprises the retainer assembly 5 and the cylindrical pins 6, the cylindrical pins 6 are uniformly and alternately positioned on the periphery of the worm wheel shaft 3 and meshed with the worm assembly 2, the cylindrical pins 6 are detachably arranged on the retainer assembly 5, the retainer assembly 5 is detachably arranged on the worm wheel shaft 3, the cylindrical pins 6 are detachably replaced after long-time use, the cylindrical pins 6 are periodically replaced, so that the meshing gap is in a set range, the cylindrical pins 6 are positioned on the periphery of the worm wheel shaft 3 through the retainer assembly 5, the positioning reliability is high, the structure is stable and reliable, the transmission stability and precision of a worm gear pair are ensured, the transmission reliability of the worm gear speed reducer is improved, and the service life of the worm gear speed reducer is prolonged.

The worm wheel shaft 3 consists of a middle section 31 and extending sections 32 which are integrally formed at two ends of the middle section 31 and extend out of the shell 1, the outer diameter of the middle section 31 is larger than that of the extending sections 32, cylindrical pins 3 are uniformly distributed on the periphery of the middle section 31, the retainer components 5 are sleeved on the extending sections 32 and detachably connected with the middle section 31, and the cylindrical pins 6 are clamped between the two groups of retainer components 5 and are matched with the retainer components 5 in a positioning manner. The intermediate shaft 31 is positioned in the shell 1, the extending section 32 extends out of the shell 1, the bearing pressed on the shell is assembled with the extending section 32, the worm wheel shaft 3 is guaranteed to rotate smoothly, as shown in the figure, the retainer components 5 are arranged on the upper side and the lower side of the intermediate section 31 and are respectively sleeved on the extending section 32, two ends of the cylindrical pins 6 are respectively positioned in the retainer components 5, and the cylindrical pins 6 are uniformly and intermittently positioned on the periphery of the intermediate section 31.

The retainer assembly 5 comprises an outer gear ring 51 and a retainer 52, wherein the inner diameter of the outer gear ring 51 is larger than the outer diameter of the extension section 32, tooth grooves 53 corresponding to the cylindrical pins 6 are formed in the outer edge of the outer gear ring 52, the outer gear ring 51 is sleeved on the extension section 32 and covers the end face of the middle section 31, the retainer 52 is sleeved on the extension section 32 and covers the outer gear ring 51, the end parts of the cylindrical pins 6 extend into the tooth grooves 53 and are positioned by the retainer, and the retainer 52 and the outer gear ring 51 are fixedly connected with the middle section 31 through bolts. The tooth grooves 53 are matched with the end parts of the cylindrical pins 6, so that the cylindrical pins 6 and the outer gear ring 51 are positioned circumferentially, the retainer 52 covers the outer gear ring 51, the end parts of the cylindrical pins 6 are positioned in the tooth grooves 53, the cylindrical pins 6 are positioned, the retainer 52, the outer gear ring 51 and the middle section 31 are connected into a whole through bolts, the cylindrical pins 6 are positioned in the tooth grooves 53 through the retainer 52, and the cylindrical pins are meshed with the worm assembly 2 to drive the worm wheel shaft 3 to rotate, so that transmission is realized.

The outer edge of the retainer 52 is provided with an annular edge 54 with a downward turnover degree, the end face of the cylindrical pin 6 abuts against the retainer 52, and the annular edge 54 is in contact with the cylindrical pin 6. The tooth grooves 53 are used for circumferentially positioning the cylindrical pins 6, the retainer 52 and the end face of the cylindrical pins 6 are propped against each other to form axial positioning for the cylindrical pins 6, the annular edge 54 and the cylindrical pins 6 are contacted to form radial positioning for the cylindrical pins 6, the axial direction, the radial direction and the circumferential direction of the cylindrical pins 6 are effectively positioned, the positioning reliability is high, the structure is stable, and the reliability and the precision of transmission are ensured.

The worm wheel shaft 3 is a hollow shaft, and the inner ring bearing 7 is pressed in the extending section 32. The hollow worm wheel shaft 3 is used for threading, the cable is supported by the inner ring of the inner ring bearing 7 when passing through the worm wheel shaft 3, the inner ring of the inner ring bearing 7 can not synchronously rotate along with the worm wheel shaft 3, the rotary abrasion of the cable in the worm wheel shaft 3 can be effectively reduced, and the threading reliability is improved.

The worm assembly 2 comprises a worm 21 meshed with the cylindrical pin 6, worm bearings 22 press-mounted at two ends of the worm 21, and a bearing seat 23 matched with the worm bearings 22, one end of the worm 21 extends outwards from the bearing seat 23, waist-shaped holes 24 are formed in the bearing seat 23, connecting holes 11 corresponding to the waist-shaped holes 24 one by one are formed in the shell 1, bolts penetrate through the waist-shaped holes 24 and are screwed in the connecting holes 11 to mount the bearing seat 23 on the shell 1, jackscrew bolts 8 capable of adjusting meshing gaps between the worm 21 and the cylindrical pin 6 are screwed in the shell 1, and the jackscrew bolts 8 are perpendicular to the worm 21 and the inner ends of the jackscrew bolts are propped against the bearing seat 23. As shown in the figure, the bolts in the kidney-shaped holes 24 are unscrewed, the jackscrew 8 is rotated again to push the bearing seat 23 to approach to one side of the cylindrical pin 6 so as to adjust the meshing gap, the bolts in the kidney-shaped holes 24 move in the kidney-shaped holes 24 along with the movement of the bearing seat 23 so as to adapt to the position change of the bearing seat 23, the bolts in the kidney-shaped holes 24 are screwed again after being adjusted in place, the meshing gap is adjusted by replacing the cylindrical pin 6 and/or rotating the jackscrew 8 according to the wearing condition in the use process of the speed reducer, the meshing gap is always in a set range in the use process, the transmission stability and precision are maintained, and the practicability is high.

The foregoing disclosure of embodiments of the present utility model has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Claims

1. The worm and gear speed reducer comprises a shell, wherein a worm assembly, a worm wheel shaft assembled in the shell through a bearing and a worm wheel assembly coaxially arranged on the worm wheel shaft are arranged in the shell, and the worm and gear speed reducer is characterized in that: the worm wheel assembly comprises a retainer assembly detachably arranged on the worm wheel shaft and a cylindrical pin which is in a cylindrical shape, is detachably arranged on the retainer assembly and is positioned at the periphery of the worm wheel shaft at uniform intervals to be meshed with the worm assembly.

2. The worm gear reducer of claim 1, wherein: the worm-wheel shaft comprises a middle section and extending sections which are integrally formed at two ends of the middle section and extend out of the shell, the outer diameter of the middle section is larger than that of the extending sections, cylindrical pins are uniformly distributed on the periphery of the middle section, the retainer components are sleeved on the extending sections and detachably connected with the middle section, and the cylindrical pins are clamped between the two groups of retainer components and are matched with the retainer components in a positioning mode.

3. The worm gear reducer of claim 2, wherein: the retainer assembly comprises an outer gear ring and a retainer, wherein the inner diameter of the outer gear ring is larger than the outer diameter of the extending section, tooth grooves corresponding to cylindrical pins are formed in the outer edge of the outer gear ring, the outer gear ring is sleeved on the extending section and covers the end face of the middle section, the retainer is sleeved on the extending section and covers the outer gear ring, the end parts of the cylindrical pins extend into the tooth grooves and are positioned by the retainer, and the retainer and the outer gear ring are fixedly connected with the middle section through bolts.

4. A worm gear reducer according to claim 3, characterized in that: the outer edge of the retainer is provided with an annular edge which is turned over by 90 degrees, the end face of the cylindrical pin is abutted against the retainer, and the annular edge is contacted with the cylindrical pin.

5. The worm gear reducer of claim 2, wherein: the worm wheel shaft is a hollow shaft, and an inner ring bearing is pressed in the extending section.

6. The worm gear reducer of claim 1, wherein: the worm assembly comprises a worm meshed with the cylindrical pin, worm bearings pressed at two ends of the worm, and bearing seats matched with the worm bearings, one end of the worm extends outwards from the bearing seats, kidney-shaped holes are formed in the bearing seats, connecting holes corresponding to the kidney-shaped holes one by one are formed in the shell, bolts penetrate through the kidney-shaped holes and are screwed in the connecting holes to mount the bearing seats on the shell, jackscrew bolts capable of adjusting meshing gaps between the worm and the cylindrical pin are screwed in the shell, and the jackscrew bolts are perpendicular to the worm and the inner ends of the jackscrew bolts are propped against the bearing seats.