CN218888321U - Output conversion structure of motor - Google Patents

Abstract

The utility model discloses an output conversion structure of a motor, which comprises an output gear, wherein the end surface of the output gear is provided with a mounting hole extending forwards and backwards; the inner core extends along the front-back direction, a hexagonal through hole is formed in the end face of the inner core, the inner core is located in the mounting hole, and the central axis of the inner core and the central axis of the output gear are overlapped; a first positioning structure which can radially position the inner core and the output gear; second location structure, it can make inner core and output gear axial positioning, the utility model discloses a hexagonal through-hole in with original output gear's interior hexagonal hole conversion to the inner core to install the inner core in output gear's central axis portion, not only make the hexagonal pole that different external diameters can be matchd with money output gear, need not change output gear moreover, and then need not change the mould to output gear's forming die, reduction in production cost.

Description

Output conversion structure of motor

Technical Field

The utility model relates to an output structure field of motor, in particular to output conversion structure of motor.

Background

The elevating platform on the market has the chassis, the desktop and can follow the support member that the chassis goes up and down, the desktop is installed at the top surface that supports the member, the elevating platform is when using, often adopt the output gear synchronous drive hexagonal pole pivoted mode of motor, the both ends of hexagonal pole are passed through drive assembly transmission such as gear train and are connected on supporting the member, and then turn into the rotary motion of hexagonal pole the elevating motion who supports the member, however, the elevating platform of different loads forms not equidimension torsion to the hexagonal pole, in order to prevent that the hexagonal pole from being out of shape the fracture because of torsion is too big, need match the hexagonal pole of different thicknesses on the elevating platform of different loads, consequently, the output gear need go out the hexagon hole that matches with the hexagonal pole external diameter through mould integrated into one piece, gear remodelling shaping is with high costs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an output conversion structure of motor to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The utility model provides a solution of its technical problem is:

an output conversion structure of a motor, comprising: the end surface of the output gear is provided with a mounting hole extending forwards and backwards; the inner core extends along the front-back direction, a hexagonal through hole is formed in the end face of the inner core, the inner core is located in the mounting hole, and the central axis of the inner core and the central axis of the output gear are overlapped; a first locating formation which radially locates the inner core and the output gear; a second locating feature axially locates the inner core and the output gear.

The technical scheme at least has the following beneficial effects: the hexagonal rod penetrates the hexagonal through-hole of inner core and can rotate with the inner core is synchronous, and the staff can be according to the size demand to the hexagonal rod, chooses to have the inner core that corresponds matching hexagonal through-hole, and rethread first location structure and second location structure install the inner core and fix in the mounting hole, make inner core and output gear can rotate in the axial with the footpath is synchronous, and then drive the hexagonal rod and rotate, the utility model discloses a change the hexagonal through-hole in original output gear's interior hexagonal hole to the inner core to install the inner core in output gear's central axis portion, not only make the hexagonal rod that same money output gear can mate different external diameters, need not change output gear moreover, and then need not change the mould to output gear's forming die, reduction in production cost.

As a further improvement of the technical scheme, the first positioning structure comprises an outer spline arranged on the outer wall of the inner core and an inner spline arranged on the inner wall of the mounting hole, and the outer spline is matched with the inner spline. The inner core and the output gear are connected by a spline, so that the inner core and the output gear are positioned in the radial direction, synchronous transmission between the inner core and the output gear is realized, the stress is uniform, and the transmission effect is improved.

As a further improvement of the technical scheme, a limiting step is circumferentially arranged at one end of the mounting hole, the inner core comprises a mounting section and a transmission section which are sequentially connected, the outer spline is positioned on the transmission section, the inner diameter of the limiting step is matched with the outer diameter of the mounting section, and the end face, close to the mounting section, of the outer spline is abutted to the limiting step. The limiting step is arranged around the inner wall of the mounting hole, during installation, one end of the mounting section of the inner core needs to be stretched into the mounting hole firstly, then the outer spline of the transmission section is meshed with the mounting hole and enters the mounting hole, the mounting section penetrates into the limiting step until the end face of the outer spline, close to one side of the mounting section, abuts against the limiting step, the limiting step limits the mounting position of the inner core, positioning of the inner core is achieved, the inner core is prevented from slipping into the limiting step too deeply or too shallowly along the mounting hole, and axial positioning of the inner core is achieved through a follow-up second positioning structure conveniently.

As a further improvement of the above technical solution, the second positioning structure is a detachable structure. When the inner core is abraded or the hexagonal rods with different outer diameters need to be replaced due to load change, the user can remove the axial positioning of the inner core by detaching the second positioning structure, and then the inner core is pulled out to remove the spline connection, so that the inner core is convenient to detach and replace, the applicability is improved, the whole output gear does not need to be detached and replaced, and the replacement cost is reduced.

As a further improvement of the technical scheme, the two mounting sections are respectively connected with two ends of the transmission section, the second positioning structure comprises positioning bearings, the two mounting sections respectively extend out of two ends of the mounting hole, and the two positioning bearings are respectively sleeved on the mounting sections and clamped at two ends of the output gear. The locating bearing has inner circle, outer lane and rolling ball between inner circle and outer lane for inner circle and outer lane relative rotation, the installation section interference fit of its inner circle and inner core, its outer lane and motor casing interference fit, two locating bearing presss from both sides in output gear's both sides, not only fix a position output gear's axial position, realize output gear and inner core's synchronous fixed, simultaneously, make the inner core directly rotate through two locating bearing and connect on motor casing, improve inner core transmission stability.

As a further improvement of the above technical solution, a washer is provided between the positioning bearing and the output gear. Two location bearings pass through the packing ring extrusion at the both ends of output gear, reduce the installation clearance, play the protection effect to location bearing simultaneously, reduce location bearing's wearing and tearing.

As another kind of improvement of above-mentioned technical scheme, the utility model discloses still include bearing, output gear includes the tooth section and connects the extension section at tooth section both ends respectively, output gear's flank of tooth is located on the tooth section, the bearing cover is established on the extension section. Output gear passes through bearing and rotates to be connected on motor casing, improves output gear's transmission stability and installation stability, reduces and rocks.

As a further improvement of the above technical solution, the second positioning structure is a riveted structure, and an outer wall of one end of the inner core is riveted to the mounting hole. The inner core penetrates into the mounting hole, after the position is determined through the limiting step, one end of the inner core is expanded and clamped on the mounting hole through the riveting structure, and the axis positioning of the inner core and the output gear is achieved.

As a further improvement of the above technical solution, the riveting structure is located on the mounting section. The direction that the inner core penetrates the mounting hole is the installation direction, the direction that the inner core withdraws from the mounting hole is the withdrawal direction, the setting of spacing rank can offset with the external splines of inner core, and then the installation direction of restriction inner core, and the riveting structure is located the installation section and keeps away from the one end of transmission section, the direction of withdrawing from of bloated installation section part restriction inner core, and then make the direction of advancing and withdrawing of inner core in the mounting hole all lock, improve the fixed effect between inner core and the output gear, reduce the possibility that both drop.

As another improvement of the technical scheme, the material of the inner core is iron-based powder metallurgy. The wear resistance, heat resistance and corrosion resistance of the inner core are ensured, and the service life of the inner core is prolonged.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is an exploded view of an output conversion structure of a motor according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an output conversion structure of a motor according to an embodiment of the present invention;

fig. 3 is a structural view of an output gear and an inner core according to a first embodiment of the present invention;

fig. 4 is a mounting structure diagram of the output gear and the inner core at another view angle according to the first embodiment of the present invention;

fig. 5 is a structural view of the output gear and the inner core according to the second embodiment of the present invention.

In the drawings: 110-motor shell, 120-output gear, 121-mounting hole, 122-internal spline, 130-inner core, 131-hexagonal through hole, 132-external spline, 140-positioning bearing, 150-gasket, 161-transmission section, 162-mounting section, 210-limiting step, 510-supporting bearing, 520-tooth section and 530-extension section.

Detailed Description

The conception, specific structure, and technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings, so that the objects, features, and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element 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 description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, an output conversion structure of a motor is actually located in a motor housing 110, and the motor output conversion structure includes an output gear 120, an inner core 130, a first positioning structure and a second positioning structure, wherein an end surface of the output gear 120 is provided with a mounting hole 121 extending through in a front-back direction, the inner core 130 extends in the front-back direction, an end surface of the inner core 130 is provided with a hexagonal through hole 131, an outer diameter of an external hexagonal rod is matched with an inner diameter of the hexagonal through hole 131, so that the hexagonal rod can penetrate into the hexagonal through hole 131 and rotate synchronously with the inner core 130, the inner core 130 is located in the mounting hole 121, and meanwhile, a central axis of the inner core 130 and a central axis of the output gear 120 coincide with each other, and the first positioning structure and the second positioning structure realize radial and axial positioning between the inner core 130 and the output gear 120, so that the output gear 120 and the inner core 130 are fixed to each other and realize synchronous transmission.

In the first embodiment, the first positioning structure includes external splines 132 disposed on the outer wall of the inner core 130, and internal splines 122 disposed on the inner wall of the mounting hole 121, and the external splines 132 and the internal splines 122 are matched with each other.

The inner core 130 and the output gear 120 of the embodiment are in spline connection, so that the inner core 130 and the output gear 120 are positioned radially, synchronous transmission between the inner core 130 and the output gear 120 is realized, the stress is uniform, the contact wear is reduced, the transmission effect is improved, and when the inner core 130 slides into the output gear 120, the circumferential fixation between the inner core 130 and the output gear 120 can be realized. The utility model discloses a with the hexagonal hole 131 in original output gear 120's interior hexagonal hole conversion to inner core 130 to install inner core 130 at output gear 120's center pin part, not only make with the hexagonal pole that output gear 120 can match different external diameters of money, need not change output gear 120 moreover, and then need not change the mould to output gear 120's forming die, reduction in production cost.

It should be noted that, the first positioning structure may also include a sliding block and a sliding groove, a plurality of sliding blocks and sliding grooves are disposed between the outer wall of the inner core 130 and the inner wall of the mounting hole 121 of the output gear 120, wherein the sliding blocks and the sliding grooves both extend in the front-back direction, so that the inner core 130 is slidably connected to the output gear 120, and the sliding blocks and the sliding grooves may also be a key disposed on the outer wall of the inner core 130 and a key slot disposed in the mounting hole 121.

Referring to fig. 2, 3 and 4, in the first embodiment, the inner core 130 includes a transmission section 161 and mounting ends respectively connected to two ends of the transmission section 161, the external spline 132 is located on the transmission section 161, a limiting step 210 is circumferentially arranged on an inner wall of one end of the mounting hole 121, an inner diameter of the limiting step 210 is matched with an outer diameter of the mounting section 162, an end surface of the external spline 132 close to the mounting section 162 abuts against the limiting step 210, the second positioning structure includes positioning bearings 140, the two mounting sections 162 respectively extend out of two ends of the mounting hole 121, and the two positioning bearings 140 are respectively sleeved on the mounting section 162 and clamped at two ends of the output gear 120.

During installation, one end of the installation section 162 of the inner core 130 needs to be firstly extended into the installation hole 121, then the external spline 132 of the transmission section 161 is engaged with and enters the installation hole 121 until the end surface of the external spline 132 close to one side of the installation section 162 abuts against the limiting step 210, at this time, the installation section 162 penetrates into the limiting step 210, the limiting step 210 limits the installation position of the inner core 130, the positioning of the inner core 130 is realized, and the inner core 130 is prevented from sliding too deep or too shallow along the installation hole 121. The positioning bearing 140 is provided with an inner ring, an outer ring and balls rolling between the inner ring and the outer ring, so that the inner ring and the outer ring rotate relatively, the inner ring is in interference fit with the installation section 162 of the inner core 130, the outer ring is in interference fit with the motor shell 110 of the reduction gearbox, the rotation axis of the installed positioning bearing 140 coincides with the central line of the inner core 130, the two positioning bearings 140 are clamped at two sides of the output gear 120, the axial position of the output gear 120 is positioned, synchronous fixing of the output gear 120 and the inner core 130 is achieved, meanwhile, the inner core 130 is directly connected to the motor shell 110 through the two positioning bearings 140 in a rotating mode, and transmission stability of the inner core 130 is improved.

It should be noted that the limiting step 210 is formed by bulging on the inner wall of the mounting hole 121, so that the outer diameter of the mounting section 162 is matched with the inner diameter of the limiting step 210, and at the same time, it is ensured that the mounting section 162 can avoid the protruding portion of the internal spline 122, and it is ensured that the mounting section 162 of the inner core 130 can penetrate into the mounting hole 121.

In this embodiment, the second positioning structure is two positioning bearings 140 respectively clamped on the mounting section 162, and is a detachable structure.

Specifically, after the inner core 130 is worn, or when the hexagonal rods with different outer diameters need to be replaced due to load change, the user can remove the axial positioning of the inner core 130 by detaching the second positioning structure, and then pull out the inner core 130 to remove the spline coupling, so that the inner core 130 is conveniently detached and replaced, the applicability is improved, the whole output gear 120 does not need to be detached and replaced, and the replacement cost is reduced. In addition, can dismantle second location structure and can be limit structure such as jump ring, sleeve, also can be connection structure such as screw, locating pin of connecting output gear 120 and inner core 130.

Further, a washer 150 is disposed between the positioning bearing 140 and the output gear 120.

Specifically, the two positioning bearings 140 are pressed at two ends of the output gear 120 through the washers 150, so that the installation gap is reduced, the positioning bearings 140 are protected, and the abrasion of the positioning bearings 140 is reduced.

Referring to fig. 5, in the second embodiment, the output conversion structure of the motor includes an output gear 120, an inner core 130, a washer 150, a back bearing 510, a first positioning structure and a second positioning structure, wherein an end surface of the output gear 120 has a mounting hole 121 penetrating in the front-back direction, an end surface of the inner core 130 has a hexagonal through hole 131 penetrating in the front-back direction, and the output gear 120 is sleeved outside the inner core 130 through the mounting hole 121; the first positioning structure comprises an external spline 132 arranged on the outer wall of the inner core 130 and an internal spline 122 arranged on the inner wall of the mounting hole 121, and the external spline 132 is matched with the internal spline 122; a limit step 210 is circumferentially arranged at one end of the mounting hole 121, the inner core 130 comprises a mounting section 162 and a transmission section 161 which are sequentially connected, the external spline 132 is positioned on the transmission section 161, the inner diameter of the limit step 210 is matched with the outer diameter of the mounting section 162, and the end surface of the external spline 132 close to the mounting section 162 is abutted against the limit step 210; the output gear 120 comprises a tooth section 520 and extension sections 530 respectively connected with two ends of the tooth section 520, the tooth surface of the output gear 120 is positioned on the tooth section 520, the bearing 510 is sleeved on the extension sections 530, and the gasket 150 is positioned between the bearing 510 and the tooth section 520.

Specifically, after the mounting section 162 of the inner core 130 penetrates into the mounting hole 121 through the mutual matching of the internal spline 122 and the external spline 132, the limiting step 210 limits the inner core 130, so that the inner core 130 and the output gear 120 can be axially positioned by a subsequent second positioning structure. And output gear 120 passes through support bearing 510 and rotate to be connected on motor casing 110, improves output gear 120's transmission stability and installation stability, reduces to rock easy to assemble.

In fact, the second positioning structure may also be a non-detachable structure, and in the second embodiment, the second positioning structure is a riveting structure, and an outer wall of one end of the inner core 130 is riveted to the mounting hole 121.

Specifically, after the inner core 130 penetrates into the mounting hole 121 and is positioned by the limiting step 210, the inner core 130 penetrates through the riveting structure along the mounting direction of the inner core 130, so that one end of the inner core 130 expands and is clamped on the mounting hole 121, and the axial positioning of the inner core 130 and the output gear 120 is realized. It should be noted that the riveting structure may be applied to any one of the two ends of the inner core 130, or both ends of the inner core may be riveted, and this embodiment is not limited thereto.

Further, the second positioning structure may also be an axial fixation between the core 130 and the output gear 120 by welding, gluing, or the like, regardless of the strength of the connection and the aging.

In order to improve the mounting stability between the inner core 130 and the output gear 120, the rivet structure of the second embodiment is located at an end of the mounting section 162 far from the transmission section 161.

Specifically, the direction in which the inner core 130 penetrates into the mounting hole 121 is taken as a mounting direction, the direction in which the inner core 130 retreats from the mounting hole 121 is taken as a retreating direction, the limiting step 210 can be abutted against the external spline 132 of the inner core 130, so as to limit the mounting direction of the inner core 130, the riveting structure is located at one end of the mounting section 162 far away from the transmission section 161, the retreating direction of the inner core 130 is limited by the expanded mounting section 162, so that the advancing and retreating directions of the inner core 130 in the mounting hole 121 are all locked, that is, a countermeasure is formed between the limiting step 210 and the second positioning structure, the fixing effect between the inner core 130 and the output gear 120 is improved, and the possibility that the inner core 130 and the output gear fall off is reduced.

In some embodiments, the material of the inner core 130 is iron-based powder metallurgy.

Specifically, the inner core 130 made of the material ensures the wear resistance, heat resistance and corrosion resistance, and the service life of the inner core 130 is prolonged.

The above description is for the purpose of illustrating the preferred embodiments of the present invention, but the present invention is not limited to the illustrated embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the appended claims.

Claims (10)

1. An output conversion structure of a motor, characterized in that: the method comprises the following steps:

an output gear (120) having an end surface provided with a mounting hole (121) extending in the front-rear direction;

the inner core (130) extends along the front-back direction, a hexagonal through hole (131) is formed in the end face of the inner core (130), the inner core (130) is located in the mounting hole (121), and the central axis of the inner core (130) and the central axis of the output gear (120) are overlapped;

a first locating feature that radially locates the inner core (130) with the output gear (120);

a second locating feature that axially locates the inner core (130) with the output gear (120).

2. The output conversion structure of the motor according to claim 1, wherein: the first positioning structure comprises an external spline (132) arranged on the outer wall of the inner core (130) and an internal spline (122) arranged on the inner wall of the mounting hole (121), and the external spline (132) and the internal spline (122) are matched with each other.

3. The output conversion structure of the motor according to claim 2, wherein: one end circumference of mounting hole (121) is equipped with spacing rank (210), inner core (130) are including installing section (162) and transmission section (161) that connect gradually, external splines (132) are located on the transmission section (161), the internal diameter of spacing rank (210) with the external diameter of installing section (162) matches each other, external splines (132) be close to the terminal surface of installing section (162) with spacing rank (210) offset.

4. An output conversion structure of a motor according to claim 3, wherein: the second positioning structure is a detachable structure.

5. The output converting structure of the motor according to claim 4, wherein: two installation section (162) are connected respectively the both ends of transmission section (161), second location structure includes location bearing (140), two installation section (162) stretch out respectively the both ends of mounting hole (121), two location bearing (140) overlap respectively and establish installation section (162) and press from both sides the both ends at output gear (120).

6. The output converting structure of an electric motor according to claim 5, wherein: a gasket (150) is arranged between the positioning bearing (140) and the output gear (120).

7. An output conversion structure of a motor according to claim 3, wherein: still include bearing (510), output gear (120) include tooth section (520) and connect extension section (530) at tooth section (520) both ends respectively, the flank of tooth of output gear (120) is located on tooth section (520), bearing (510) cover is established on extension section (530).

8. The output conversion structure of the motor according to claim 7, wherein: the second positioning structure is a riveting structure, and the outer wall of one end of the inner core (130) is riveted on the mounting hole (121).

9. The output conversion structure of the motor according to claim 8, wherein: the riveted structure is located on the mounting section (162).

10. The output conversion structure of the motor according to claim 1, wherein: the inner core (130) is made of iron-based powder metallurgy.

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