CN217192119U

CN217192119U - Riveting die for motor output shaft and gear

Info

Publication number: CN217192119U
Application number: CN202220222131.4U
Authority: CN
Inventors: 胡俊; 罗明; 万兴军
Original assignee: Anhui Leili Intelligent Technology Co ltd
Current assignee: Anhui Leili Intelligent Technology Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-08-16
Anticipated expiration: 2032-01-26

Abstract

The utility model relates to a riveting die for motor output shaft and gear, include: the supporting unit and the riveting unit are matched for use; the supporting unit is used for supporting and positioning the motor output shaft to be riveted; the riveting unit comprises a riveting seat arranged above the supporting unit, a riveting head arranged on the riveting seat and used for riveting the gear, and a prepressing block positioned on the circumferential outer side of the riveting head; an elastic body suitable for compression deformation is arranged between the pre-pressing block and the riveting seat; the pre-pressing block is in sliding fit with the rivet head so that the pre-pressing block is suitable for moving along the longitudinal direction of the riveting seat; the pre-pressing block is used for pressing the gear downwards towards the supporting unit to enable the gear to be engaged with the matching surface of the output shaft of the motor. The utility model discloses can improve the riveting efficiency between motor output shaft and the gear.

Description

Riveting die for motor output shaft and gear

Technical Field

The utility model relates to a motor processing equipment technical field particularly, relates to a riveting mould for motor output shaft and gear.

Background

Stepping motors are widely used in household appliances. In a stepping motor with a reduction gear mechanism, the torque of the motor is generally output through a gear mechanism and an output shaft assembly, the output shaft assembly consists of a gear and an output shaft, the gear and the output shaft are mostly riveted and fixed through a riveting die, the gear and the reduction gear mechanism are in meshing transmission, and the output shaft is arranged outside the motor and is matched with a mounting hole in a household appliance for mounting. The gear and the output shaft in the output shaft assembly must have certain pull-off strength, namely the inner diameter of the gear of the output shaft assembly is in interference fit with the outer diameter of the matching part of the output shaft.

In the prior art, a gear of an output shaft assembly is riveted with an output shaft, and a prepressing riveting structure of a riveting die mainly comprises an annular rivet head and an annular prepressing block which is sleeved on the outer diameter of the rivet head and has certain elasticity. When not closing the mould, terminal surface is less than terminal surface under the die under the pre-compaction piece, and during the compound die, terminal surface at first contacts the gear under the pre-compaction piece, and along with the compound die, the pre-compaction piece produces elastic deformation and to gear production pressure, impresses the gear on the output shaft, then the die riveting produces the riveting mark, guarantees to pull out intensity. Along with prepressing and riveting, the prepressing block generates compression and has certain relative movement along the rivet head. For riveting of the metal gear and the output shaft, because the metal gear is in interference fit with the output shaft, the pressure of the conventional elastic pre-pressing block hardly ensures that the lower end face of the metal gear is pressed to the matching face of the output shaft at a certain distance without clearance, and the metal gear cannot be pre-pressed in place. Therefore, in the current stage, riveting the metal gear and the output shaft is carried out by prepressing one pair of dies in place and riveting the other pair of dies; that is to say, a pair of dies can not complete prepressing and riveting at the same time. The assembly mode has the advantages of inconvenient operation process, low working efficiency, high management difficulty and easy occurrence of quality loss caused by the fact that an output shaft assembly which is not riveted flows to a subsequent way; in addition, the riveting structure has high labor intensity and large requirement on the workload of workers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a riveting mould for motor output shaft and gear to solve the technical problem who improves the efficiency of riveting processing between motor output shaft and the gear.

The utility model discloses a riveting die for motor output shaft and gear is realized like this:

a riveting die for a motor output shaft and a gear, comprising:

the supporting unit is used for supporting and positioning the motor output shaft to be riveted;

the riveting unit comprises a riveting seat arranged above the supporting unit, a riveting head arranged on the riveting seat and used for riveting the gear, and a prepressing block positioned on the circumferential outer side of the riveting head;

an elastic body suitable for compression deformation is arranged between the pre-pressing block and the riveting seat; and

the pre-pressing block is in sliding fit with the rivet head so that the pre-pressing block is suitable for moving along the longitudinal direction of the riveting seat; the pre-pressing block is used for pressing the gear downwards towards the supporting unit to enable the gear to be engaged with the matching surface of the output shaft of the motor.

In an optional embodiment of the present invention, a movable groove adapted to be slidably engaged with the rivet head is formed in the pre-pressing block along the longitudinal direction of the riveting seat; and

when the elastic body is in an uncompressed deformation state, the rivet head is completely gathered in the movable groove; and is

When the elastic body is in a compression deformation state, the pre-pressing block makes an ascending motion relative to the rivet head so that the rivet head gradually extends out of the movable groove.

In an alternative embodiment of the invention, the end surface of the pre-pressing block facing the bearing unit is adapted to cover the axial end surface of the gear facing the pre-pressing block.

In the optional embodiment of the present invention, the pre-pressing block is made of metal material.

In an optional embodiment of the present invention, a recessed cavity is provided in the rivet head, the recessed cavity extending to an end surface of the rivet head facing the supporting unit;

the recessed cavity is suitable for inserting one end of the output shaft of the motor.

In an alternative embodiment of the present invention, the rivet head is provided with a conical rivet face facing the end face of the supporting unit and located at the circumferential edge of the recessed cavity.

In an optional embodiment of the present invention, the rivet pressing base includes an upper die base, an upper padding plate coupled to an end surface of the upper die base facing the supporting unit, and a rivet head fixing base coupled to an end surface of the upper padding plate facing the supporting unit;

the elastic body is arranged in the upper backing plate; and

one end of the elastic body is abutted to the upper die base, and the other end of the elastic body is abutted to the end part of the pre-pressing block departing from the supporting unit.

In an alternative embodiment of the invention, the elastic body comprises at least two springs arranged along the circumferential direction of the rivet head.

In an alternative embodiment of the present invention, the end face of the pre-pressing block, which is connected with the elastic body in a matching manner, is integrally formed with a connecting portion which is an annular protrusion.

In an alternative embodiment of the present invention, the supporting unit includes a lower base and a positioning sleeve disposed in the lower base for positioning the output shaft of the motor.

The utility model discloses optional embodiment, a riveting die for motor output shaft and gear still includes the guide structure who is equipped with between lower base and riveting seat.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: the utility model discloses a riveting die for motor output shaft and gear, pre-compaction piece set up in the circumference outside of die, make and adopt the utility model discloses when riveting die carries out the riveting operation, pre-compaction piece can produce earlier before the riveting operation at the die and act on to the pushing down of gear, just so under the structure the utility model discloses a riveting die both can realize the riveting operation to motor output shaft and gear, can realize again to the pre-compaction operation of gear, compares and adopts different moulds to realize respectively the condition of above-mentioned function among the prior art and say, can effectively improve the efficiency of whole riveting operation.

Furthermore, an elastic body is arranged between the pre-pressing block and the riveting seat, under the action force of the elastic body, the pre-pressing block can generate enough pre-pressing force to pre-press the gear to enable the gear to be in gapless fit with the matching surface of the output shaft, so that the positioning effect on the gear in the riveting process is effectively ensured, and the probability of occurrence of the problem that riveting is not in place due to deviation of the gear in the riveting process is reduced.

Furthermore, it is right to the utility model discloses a riveting die only needs to replace the die in to the motor output shaft of different specifications and the elastomer of different compression coefficients can improve the riveting suitability to different motor output shafts, and specific the utility model discloses an elastomer and die are changed conveniently, that is to say that the utility model discloses holistic riveting die's commonality is stronger.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 shows a schematic perspective view of a riveting die for a motor output shaft and a gear according to an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional structural view of a riveting die for a motor output shaft and a gear provided by an embodiment of the invention;

fig. 3 is a schematic exploded view illustrating a riveting unit of a riveting die for a motor output shaft and a gear according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural diagram illustrating a riveting unit of a riveting die for a motor output shaft and a gear according to an embodiment of the present invention;

fig. 5 shows a schematic diagram of a riveting unit and a supporting unit of a riveting die for a motor output shaft and a gear provided by an embodiment of the invention in a state of in-place die assembly;

FIG. 6 shows an enlarged view of the A direction of FIG. 5;

fig. 7 shows a schematic view of a riveting unit and a supporting unit of a riveting die for a motor output shaft and a gear provided by the embodiment of the invention in an open state;

fig. 8 shows a schematic diagram of a riveting unit and a supporting unit of a riveting die for a motor output shaft and a gear provided by an embodiment of the present invention in a die assembly process

Fig. 9 shows a structural diagram of a motor output shaft and a gear corresponding to a riveting die for the motor output shaft and the gear provided by the embodiment of the invention.

In the figure: the riveting device comprises a motor output shaft 1, a riveting step surface 11, an output shaft matching surface 13, a gear 2, a positioning sleeve 31, a lower die holder 32, a lower backing plate 33, a fixed seat 34, a prepressing block 4, a movable groove 41, a connecting part 43, an elastic body 5, a rivet head 6, a hanging table structure 61, a guide pillar 71, a guide sleeve 72, an upper die holder 81, an upper backing plate 82, a rivet head fixed seat 83 and a die shank 9.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

Referring to fig. 1 to 9, the present embodiment provides a riveting die for a motor output shaft and a gear, including: the riveting device comprises a supporting unit and a riveting unit arranged above the supporting unit. The supporting unit is used for supporting and positioning the motor output shaft 1 to be riveted.

In detail, referring to the drawings, firstly, the supporting unit comprises a lower base and a positioning sleeve 31 arranged in the lower base and used for positioning the output shaft 1 of the motor. The lower base comprises a lower base 32, a lower cushion plate 33 which is matched with the end face of the lower base 32 facing the riveting unit through, for example but not limited to, two symmetrically distributed positioning pins, and a fixed base 34 which is matched with the lower base 32 through, for example but not limited to, screws; the fixing seat 34 is located on one side of the lower backing plate 33 facing the riveting unit, and the fixing seat 34 and the lower die seat 32 form up-and-down clamping fixation for the lower backing plate 33. The lower pad plate 33 is provided to prevent the lower die base 32 from being damaged by pressing during the punching process. An installation cavity for fixing the positioning sleeve 31 is arranged in the fixed seat 34. The outer circular surface of the positioning sleeve 31 is fixedly fitted with the inner circular surface of the fixing seat 34, and the lower end surface of the positioning sleeve 31 is fitted with the upper end surface of the lower backing plate 33 (here, "upper" specifically corresponds to the direction toward the riveting unit, and "lower" corresponds to the direction away from the riveting unit).

Secondly, the riveting unit comprises a riveting seat arranged above the supporting unit, a riveting head 6 arranged on the riveting seat and used for riveting the gear 2, and a prepressing block 4 positioned on the circumferential outer side of the riveting head 6; an elastic body 5 suitable for compression deformation is arranged between the pre-pressing block 4 and the riveting seat; and the pre-pressing block 4 is in sliding fit with the rivet head 6 so that the pre-pressing block 4 is suitable for moving along the longitudinal direction of the riveting seat (it should be noted here that the longitudinal direction of the riveting seat in this embodiment specifically refers to the direction of the lifting movement of the riveting seat arranged above the supporting unit relative to the supporting unit); the pre-weight 4 is used to press the gear wheel 2 down towards the support unit to bring the gear wheel 2 into engagement with the mating surface of the motor output shaft 1. With such a structure, that is, the preload of the preload block 4 of the present embodiment to the gear 2 can be adaptively adjusted by selecting the elastic bodies 5 having different compression coefficients.

In an alternative embodiment, which is illustrated in the attached drawings, the rivet pressing base includes an upper die base 81, an upper backing plate 82 coupled to an end surface of the upper die base 81 facing the supporting unit, and a rivet head fixing base 83 coupled to an end surface of the upper backing plate 82 facing the supporting unit; wherein, the end surface of the upper die holder 81 departing from the upper backing plate 82 is also provided with a die handle 9 for connecting a punch. The upper die base 81 is fixedly connected with the external thread of the die shank 9 through, for example but not limited to, a thread, and is used for fixing the upper backing plate 82 and the rivet head fixing base 83 and transmitting pressure. The upper backing plate 82 fixes the plane position through two symmetrical positioning pins and two screws, and has the function of preventing the upper die base 81 from being damaged by the top of the riveting head 6; the rivet head fixing seat 83 is connected with the upper die base 81 through, for example, but not limited to, a screw; the upper die holder 81 and the rivet head fixing holder 83 clamp and fix the upper and lower end surfaces of the upper backing plate 82 (here, "upper" specifically corresponds to a direction away from the supporting unit, and "lower" corresponds to a direction toward the supporting unit). Generally speaking, the riveting die of this embodiment includes upper die base 81, upper padding plate 82 and the die head fixing base 83 under the split type structure and can be convenient for this riveting die of implementing to select corresponding die head 6 and elastomer 5 according to the motor output shaft 1 of different specifications adaptability ground to improve the riveting die of this embodiment to the riveting adaptability of different motor output shafts 1.

In the specific use process of the riveting die of the embodiment, the riveting unit is longitudinally pressed downwards towards the supporting unit under the action of the punch, the supporting unit is kept still, and after riveting is finished, the riveting unit moves upwards again to restore to the initial state. In this process, in an optional implementation case, in view of limiting the movement trajectory of the riveting unit, a guide structure is further provided between the upper die holder 81 and the lower die holder 32 in this embodiment, and the guide structure includes a guide pillar 71 and a guide sleeve 72 which are adapted to each other; the specific embodiment of the guide post 71 and the guide sleeve 72 coupled to the upper die holder 81 or the lower die holder 32 is not limited in any way.

Regarding the matching between the rivet head 6 and the pre-pressing block 4 in this embodiment, it should be further described that the pre-pressing block 4 is connected to the upper die holder 81 through the elastic body 5, the upper backing plate 82 and the rivet head fixing seat 83 are formed with a movable cavity adapted to accommodate the pre-pressing block 4, and the pre-pressing block 4, the upper backing plate 82 and the rivet head fixing seat 83 are formed with a clearance fit structure, so that the pre-pressing block 4 can realize smooth longitudinal movement and cannot generate lateral dimension deviation in the longitudinal movement process. The rivet 6 is connected to the rivet holder 83 via the hanging structure 61, and the hanging portion of the rivet 6 is pressed by the upper pad 82, so that the hanging portion of the rivet 6 is firmly limited in the rivet holder 83.

Furthermore, a movable groove 41 suitable for being in sliding fit with the rivet head 6 is formed in the prepressing block 4 along the longitudinal direction of the riveting seat; when the elastic body 5 is in an uncompressed deformation state, the rivet head 6 is completely gathered in the movable groove 41; and when the elastic body 5 is in a compression deformation state, the pre-pressing block 4 makes an ascending motion relative to the rivet head 6 so that the rivet head 6 gradually extends out of the movable groove 41. Under such structure for holistic riveting mould is when carrying out riveting process to motor output shaft 1 and gear 2, briquetting 4 can produce the effect of pushing down to gear 2 earlier before the operation is riveted to rivet head 6.

For the elastic body 5 employed in the present embodiment, the elastic body 5 includes at least two springs provided along the circumferential direction of the rivet head 6. And when only two springs are arranged, the two springs are preferably in a symmetrical distribution structure.

It should be further noted that, in an alternative implementation, the pre-pressing block 4 of the present embodiment is integrally formed with an annular connecting portion 43 at the end face where the elastic body 5 is coupled; the connecting part 43 forms sliding friction fit between the whole prepressing block 4 and the upper backing plate 82 in the longitudinal movement process, and under the structure, for the longitudinal movement process of the prepressing block 4, the whole prepressing block 4 does not generate sliding friction with the upper backing plate 82, but only generates at the connecting part 43, so that the friction resistance in the longitudinal movement process of the prepressing block 4 can be effectively reduced.

In addition, in order to effectively ensure the pre-pressing effect of the pre-pressing block 4 of the present embodiment on the gear 2, it should be further described that, for example, in an optional case, the pre-pressing block 4 of the present embodiment adopts a structure conforming to the gear 2, that is, in combination with the gear 2 having a circular structure, the pre-pressing block 4 of the present embodiment also adopts a circular structural body, and the pre-pressing block 4 in the shape is distributed coaxially with the gear 2, on this basis, the area of the end surface of the pre-pressing block 4 facing the gear 2 is designed to be not smaller than the area of the end surface of the gear 2 facing the pre-pressing block 4, that is, the end surface of the pre-pressing block 4 facing the support unit is adapted to cover the axial end surface of the gear 2 facing the pre-pressing block 4, so as to effectively ensure the pre-pressing effect of the pre-pressing block 4 on the gear 2. Of course, the condition that the end surface of the pre-pressing block 4 facing the supporting unit is suitable for covering the axial end surface of the gear 2 facing the pre-pressing block 4 is only a preferable condition, and actually, the area of the end surface of the pre-pressing block 4 facing the gear 2 can be more than two thirds of the area of the whole end surface of the gear 2 facing the pre-pressing block 4, so that the pre-pressing requirement for the gear 2 can be met.

In addition, in an alternative implementation, the pre-pressing block 4 in this embodiment is made of a metal material. The pre-pressing block 4 is made of metal, so that the pre-pressing process plays a role in correcting the gear 2, and the inner hole of the metal gear 2 can be better reduced to scratch the outer diameter of the output shaft to generate metal garbage. The specific principle is as follows: when the gear 2 made of metal is horizontal (namely, in the direction vertical to the central line of the motor output shaft 1), the metal garbage generated during riveting is minimum. The reason is that when the matching surfaces of the metal gear 2 and the motor output shaft 1 are not parallel, the metal gear 2 is leveled firstly and then is pre-pressed in place by the metal pre-pressing block 4, so that metal garbage is reduced; and present, if the pre-compaction piece 4 of elastic material can warp earlier a section distance and then level, metal gear 2 can sink a section distance along the output shaft vertical direction under the effect of elastic material power and produce more rubbish this moment, and nonmetal rigid material has the big short-lived problem of wearing and tearing.

Finally, in the rivet head 6 of the present embodiment, it should be noted that a concave cavity 62 extending to the end surface of the rivet head 6 facing the support unit is provided in the rivet head 6; the recessed cavity 62 is adapted for insertion of one end of the motor output shaft 1 therein. On the basis of the structure, the rivet head 6 faces the end face of the supporting unit and is provided with a conical riveting surface at the circumferential edge of the concave cavity.

In summary, the specific use principle of the riveting die for the motor output shaft and the gear of the embodiment is as follows:

firstly, putting a motor output shaft 1 into a positioning sleeve 31 of a supporting unit, and then preliminarily sleeving a gear 2 on the motor output shaft 1;

secondly, the riveting unit is driven by the punch press to do downward pressing movement, namely, the die is closed, the prepressing block 4 firstly contacts the end face, facing the riveting unit, of the gear 2, and then under the action of the elastic force of the elastic body 5, the prepressing block 4 can be prepressed to be in a gapless state between the end face, deviating from the riveting unit, of the gear 2 and the matching surface 13 of the output shaft;

thirdly, as the riveting unit continues to press downwards, the lower end face of the riveting head 6 contacts the riveting step face 11 on the motor output shaft 1, and the riveting step face 11 is riveted to form a riveting mark K;

and fourthly, after the riveting is finished, the riveting unit moves upwards, namely the die is opened, and the elastic body 5 which is compressed to a certain degree generates the restored elastic force to separate the motor output shaft 1 from the riveting head 6. Thus, the riveted motor output shaft 1 is taken out from the positioning sleeve 31, and the riveting operation of the motor output shaft 1 and the gear 2 is completed.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims

1. The utility model provides a riveting die for motor output shaft and gear which characterized in that includes:

2. The riveting die for the motor output shaft and the gear according to claim 1, wherein a movable groove suitable for being in sliding fit with a rivet head is formed in the pre-pressing block along the longitudinal direction of the riveting seat; and

3. The riveting die for the motor output shaft and the gear according to claim 1, wherein the end surface of the pre-pressing block facing the support unit is adapted to cover the axial end surface of the gear facing the pre-pressing block.

4. The riveting die for the motor output shaft and the gear according to any one of claims 1 to 3, wherein the pre-pressing block is made of a metal material.

5. The riveting die for the motor output shaft and the gear according to claim 1, wherein a concave cavity extending to the end surface of the rivet head facing the support unit is arranged in the rivet head;

6. The riveting die for the motor output shaft and the gear according to claim 5, wherein the rivet head is provided with a conical riveting surface facing the end surface of the supporting unit and located at the circumferential edge of the concave cavity.

7. The riveting die for the motor output shaft and the gear according to claim 1, wherein the riveting die comprises an upper die base, an upper backing plate matched with the end surface of the upper die base facing the supporting unit, and a rivet head fixing base matched with the end surface of the upper backing plate facing the supporting unit;

the elastic body is arranged in the upper backing plate; and

8. The riveting die for the motor output shaft and the gear according to claim 1 or 7, wherein the elastic body comprises at least two springs arranged along the circumferential direction of the rivet head.

9. The riveting die for the motor output shaft and the gear according to claim 1, wherein the end face of the pre-pressing block matched with the elastic body is integrally formed with a connecting part in an annular protrusion shape.

10. The riveting die for the motor output shaft and the gear according to claim 1, wherein the supporting unit comprises a lower base and a positioning sleeve arranged in the lower base and used for positioning the motor output shaft.

11. The riveting die for the motor output shaft and the gear according to claim 10, further comprising a guide structure arranged between the lower base and the riveting seat.