CN205578672U

CN205578672U - Micro -gear case and shell thereof

Info

Publication number: CN205578672U
Application number: CN201620216760.0U
Authority: CN
Inventors: 谢伟群; 徐尚祥; 辛栋
Original assignee: Shenzhen Zhaowei Machinery and Electronics Co Ltd
Current assignee: Shenzhen Mechatronics Mechatronics And Ltd By Share Ltd
Priority date: 2016-03-21
Filing date: 2016-03-21
Publication date: 2016-09-14
Anticipated expiration: 2026-03-21

Abstract

The utility model relates to a micro -gear case technical field provides micro -gear case and shell thereof, the shell of micro -gear case, internal tooth shell and input end cover and output end cover including the tube -shape of the first port, the second port that have the intercommunication, the first port of internal tooth shell with through a buckle structure fixed connection between the input end cover, the second port of internal tooth shell with through the 2nd buckle structure fixed connection between the input end cover. The utility model discloses in, adopt two buckle structure will import end cover, output end cover and internal tooth shell fixed connection formation shell, this kind of buckle structure is simple, tears, adorns the convenience open, and is with low costs, and joint strength is reliable.

Description

Micro gear box and shell thereof

Technical Field

The utility model relates to a micro-gear box technical field, more specifically say, relate to a micro-gear box and shell thereof.

Background

The micro gear box made of the plastic material and by the injection molding process has the advantages of light weight, small volume, large transmission ratio and the like, and therefore, the micro gear box has wide application in the fields of electronic communication, intelligent equipment and the like.

The existing gear box shell mainly adopts a combined structure and consists of an inner gear shell and an end cover. In order to avoid axial separation of the gear box when the gear box is subjected to axial pull-out force, the inner gear shell and the end cover are connected through screws arranged on the side wall of the inner gear shell. However, when the gear box has a small diameter (12 mm) and the input end needs to be provided with an electromagnetic brake device, the structural limitation of the micro gear box is not enough space for using a screw for connection. Even if the screw connection is used, the manufacturing cost of the tiny screws is high and the installation is inconvenient. Simultaneously, because interior tooth shell and end cover adopt the plastic material, have certain elastic deformation, the packing power is not enough when using for a long time, and the structural reliability who uses interference fit's mode to prevent gear box axial separation is relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a micro gear case and shell thereof, when the shell that aims at solving micro gear case among the prior art adopted the screw assembly, with high costs, install inconvenient and the poor problem of reliability.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a shell of micro-gear box, including the internal tooth shell and input end cover and the output end cover of the tube-shape that have the first port of intercommunication, second port, the first port of interior tooth shell with through first buckle structure fixed connection between the input end cover, the second port of interior tooth shell with through second buckle structure fixed connection between the input end cover.

Optionally, the first buckle structure includes two first heavy grooves arranged on the side wall of the input end cover, a first buckle arranged in each first heavy groove, and a first joint block arranged on the edge of the side wall of the first port and capable of extending into the first heavy grooves respectively, wherein the first joint block is provided with a first connection hole for the first buckle to be clamped into.

Optionally, the outer end surface of the first clamping block is provided with a first guide inclined surface, and the first clamp is provided with a second guide inclined surface matched with the first guide inclined surface.

Optionally, the inner wall of the first connection hole is a first vertical surface, and the first buckle is provided with a second vertical surface which is adjacent to the first guide inclined surface and can be clamped on the first vertical surface.

Optionally, the edge of the first port extends inward to form an end face, an input hole through which the input shaft can extend is formed in the center of the end face, at least two first positioning bosses are arranged on the end face, and first positioning holes which can be matched with the first positioning bosses are formed in the end face, facing the inner gear shell, of the input end cover; or,

the inner gear shell is provided with an end face at one end where the first clamping block is located, the center of the end face is provided with an input hole through which an input shaft can extend, the end face is provided with at least two first positioning holes, and the input end cover faces towards the end face of the inner gear shell and can be matched with the first positioning bosses of the first positioning holes.

Optionally, the second buckle structure includes locating relatively two second heavy grooves at the second port lateral wall edge, locating respectively the second buckle in the second heavy groove and locating relatively can stretch into respectively on the output end cover lateral wall the second joint piece in the second heavy groove, each be equipped with on the second joint piece and supply the second connecting hole that second buckle card was gone into.

Optionally, the outer end surface of the second clamping block is provided with a third guide inclined surface, and the second clamping buckle is provided with a fourth guide inclined surface matched with the third guide inclined surface.

Optionally, an inner wall of the second connection hole is a third vertical surface, and the second buckle has a fourth vertical surface adjacent to the fourth guiding inclined surface and capable of being clamped on the third vertical surface.

Optionally, the output end cover comprises a cover body and a gear ring arranged on an inner end face of the cover body, the diameter of the gear ring is smaller than that of the cover body, an inner hole at the second port is meshed with the gear ring, a second positioning boss is further arranged on the inner end face of the cover body and located on the outer side of the gear ring, and a second positioning hole matched with the second positioning boss is formed in the inner gear shell; or,

the output end cover comprises a cover body and a gear ring arranged on the inner end face of the cover body, the diameter of the gear ring is smaller than that of the cover body, an inner hole at the second port is meshed with the gear ring, a second positioning hole is formed in the end face of the first port, and a second positioning boss matched with the second positioning hole is arranged on the inner end face of the cover body and located on the outer side of the gear ring.

The utility model also provides a micro-gear box, include the shell and locate at least one-level planetary gear drive in the shell, the shell is foretell micro-gear box's shell.

The utility model discloses in, adopt two buckle structures to form the shell with input end cover, output end cover and internal tooth shell fixed connection, this kind of buckle simple structure tears, and the dress is convenient, and is with low costs, and joint strength is reliable.

Drawings

Fig. 1 is an exploded view of a housing of a micro gearbox according to an embodiment of the present invention;

fig. 2 is a schematic view of an alternative angle of view of the inner tooth shell in an embodiment of the present invention;

100-an internal gear housing; 110 — a first port; 111-a first card block;

112-a first connection hole; 113-a first guide ramp; 114-a first vertical face;

115-end face; 116-an input aperture; 117-first positioning boss;

120-a second port; 121-a second sink tank; 122-a second snap;

123-a fourth guide ramp; 124-a fourth upright surface; 125-a second positioning hole;

200-an output end cover; 210-a second card block; 211-third guiding slope;

220-second connection hole; 221-a third upright surface; 230-a cover;

231-a second locating boss; 240-toothed ring; 300-an input end cap;

310-a first sink; 320-a first buckle; 321-a second guiding bevel;

322-second upright surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up, down, etc. in the present embodiment are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting.

Referring to fig. 1 and 2, an embodiment of the present invention provides a housing of a micro gear box, including an internal gear housing 100, an output end cap 200, and an input end cap 300. The inner gear housing 100 has a first port 110 and a second port 120 in communication. The first port 110 of the internal gear housing 100 is fixedly connected with the input end cover 300 through a first snap structure, and the second port 120 of the internal gear housing 100 is fixedly connected with the input end cover 300 through a second snap structure.

In this embodiment, the input end cap 300, the output end cap 200 and the internal gear housing 100 are fixedly connected to form a housing by using a double-fastener structure, and the fastener has the advantages of simple structure, convenience in disassembly and assembly, low cost and reliable connection strength.

Specifically, the first snap structure includes two first sinking grooves 310 oppositely disposed on the side wall of the input end cap 300, first snaps 320 disposed in the first sinking grooves 310, and first snap blocks 111 oppositely disposed on the side wall edge of the first port 110 of the inner gear shell 100 and capable of respectively extending into the first sinking grooves 310, and each first snap block 111 is provided with a first connection hole 112 for the first snap 320 to be snapped in.

Further, the outer end surface of the first clamping block 111 has a first guiding inclined surface 113, and the first clamp 320 is provided with a second guiding inclined surface 321 matched with the first guiding inclined surface 113.

The inner wall of the first connection hole 112 is a first vertical surface 114, and the first buckle 320 has a second vertical surface 322 adjacent to the first guiding inclined surface 113 and capable of being clamped on the first vertical surface 114.

In this embodiment, the first engaging piece 111 is a block-shaped structure with an arc-shaped bend, and the bending angle of the first engaging piece is consistent with the arc surface of the outer wall of the inner gear housing 100. The thickness of the first clamping block 111 is similar to that of the first sinking groove 310. The width and length of the first sinking groove 310 are slightly larger than the size of the first clamping block 111, and in order to ensure the positioning accuracy between the input end cover 300 and the internal gear housing 100, a positioning structure is further arranged on the end face of the clamping structure. Specifically, the edge of the first port 110 extends inward to form an end face 115, the center of the end face 115 has an input hole 116 through which an input shaft can extend, at least two first positioning bosses 117 are provided on the end face 115, and a first positioning hole (not shown in the figure) that can be matched with each first positioning boss 117 is provided on the end face of the input end cover 300 facing the inner gear shell 100. The precise positioning between the input end cover 300 and the internal gear housing 100 is realized through the matching of the first positioning boss 117 and the first positioning hole. Of course, the positions of the first positioning boss 117 and the first positioning hole may be interchanged, that is, the first positioning boss 117 is disposed on the end face of the input end cover 300 facing the internal gear housing 100, and the first positioning hole is disposed on the end face 115 of the first port 110.

For the convenience of assembly, chamfers (not numbered in the drawings) are provided at both the end of the first positioning boss 117 and the end of the first positioning hole.

In addition, in the embodiment, the end face 115 is formed on the mounting side of the input end cover 300, the semi-closed structural design ensures that the housing has good structural rigidity and is not easy to deform, the semi-closed end with high precision is used as an input end, the influence of the deformation of the inner gear shell 100 on the meshing stability of the gearbox is reduced, the noise of the gearbox is reduced, and particularly for a miniature high-speed gearbox, the noise reduction effect is obvious.

When the input end cover 300 is installed, the first clamping block 111 is directly opposite to the first sinking groove 310, the first clamping block 111 and the first sinking groove 310 are made to approach each other, the second guide inclined surface 321 on the first clamping block 320 is firstly attached to the first guide inclined surface 113 at the end of the first clamping block 111, the first clamping block 111 outwards elastically deforms under the pushing action of the second guide inclined surface 321 to open, the first clamping block 320 continues to move, and the first positioning boss 117 is inserted into the first positioning hole under the guiding of the chamfer angle. The first fastener 320 continues to move and completely slides into the first connection hole 112 of the first fastener block 111, and is firmly fixed by the fastening between the second vertical surface 322 of the first fastener 320 adjacent to the second guide inclined surface 321 and the first vertical surface 114 of the first connection hole 112, so that the input end cap 300 and the internal tooth housing 100 are assembled. When the gear box is under axial tension, the first catch 320 is prevented from falling out of the first connection hole 112 due to the firm engagement between the second upright surface 322 of the first catch 320 and the first upright surface 114 of the first connection hole 112.

Specifically, the second fastening structure includes two second sinking grooves 121 oppositely disposed on the side wall edge of the second port 120 of the inner gear shell 100, a second fastening 122 disposed in each second sinking groove 121, and second fastening blocks 210 oppositely disposed on the side wall of the output end cap 200 and capable of respectively extending into the second sinking grooves 121, wherein each second fastening block 210 is provided with a second connecting hole 220 for the second fastening 122 to be fastened in.

Similarly, the outer end surface of the second clip block 210 has a third guiding inclined surface 211, and the second clip 122 is provided with a fourth guiding inclined surface 123 matching with the third guiding inclined surface 211.

Similarly, the inner wall of the second connecting hole 220 is a third vertical surface 221, and the second buckle 122 has a fourth vertical surface 124 adjacent to the fourth guiding inclined surface 123 and capable of being clamped on the third vertical surface 221.

Similarly, in order to ensure the positioning accuracy between the output end cap 200 and the internal gear housing 100, the present embodiment further provides a positioning structure between the output end cap 200 and the internal gear housing 100.

In this embodiment, the output end cap 200 includes a cap body 230 and a gear ring 240 disposed on an inner end surface of the cap body 230, a diameter of the gear ring 240 is smaller than a diameter of the cap body 230, an inner hole at the second port 120 is engaged with the gear ring 240, a second positioning boss 231 is further disposed on the inner end surface of the cap body 230 and located outside the gear ring 240, and a second positioning hole 125 matched with the second positioning boss 231 is disposed on the internal gear housing 100. Likewise, the positions between the second positioning boss 231 and the second positioning hole 125 may be interchanged.

In this embodiment, the gear ring 240 and the inner hole at the second port 120 of the internal gear housing 100 cooperate to correct the deformation of the internal gear housing 100, so as to further reduce the influence of the deformation of the open end of the internal gear housing 100 on the transmission of the gearbox.

In this embodiment, the output end cap 200 is installed the same as the input end cap 300, and is not described herein.

The embodiment also provides a miniature gearbox (not shown in the figure), which comprises the shell and at least one stage of planetary gear transmission mechanism arranged in the shell. The casing is assembled by adopting the double-buckle structure, so that the gear box can bear axial tension and has high reliability; moreover, the clamping structure is simple, convenient to process, small in occupied size and suitable for the miniature gear box with a small diameter.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a miniature gearbox's shell, includes the internal tooth shell and input end cover and the output end cover of the tube-shape that have first port, the second port that communicate, its characterized in that: the first port of the inner gear shell is fixedly connected with the input end cover through a first buckle structure, and the second port of the inner gear shell is fixedly connected with the input end cover through a second buckle structure.

2. The housing for a micro-gearbox as set forth in claim 1, wherein: first buckle structure is including locating relatively two first heavy grooves on the lateral wall of input end cover, locate each first buckle that sinks in the groove and locating relatively first port lateral wall edge just can stretch into respectively first joint piece in sinking the groove, each be equipped with on the first joint piece and supply the first connecting hole that first buckle card was gone into.

3. The housing of a micro-gearbox as set forth in claim 2, wherein: the outer end face of the first clamping block is provided with a first guide inclined plane, and the first buckle is provided with a second guide inclined plane matched with the first guide inclined plane.

4. A housing for a micro-gearbox according to claim 3, wherein: the inner wall of the first connecting hole is a first vertical surface, and the first buckle is provided with a second vertical surface which is adjacent to the first guide inclined surface and can be clamped on the first vertical surface.

5. The casing of the micro-gearbox as set forth in claim 2, 3 or 4, wherein: the edge of the first port extends inwards to form an end face, an input hole for an input shaft to extend out is formed in the center of the end face, at least two first positioning bosses are arranged on the end face, and first positioning holes which can be matched with the first positioning bosses are formed in the end face, facing the inner gear shell, of the input end cover; or,

6. The housing for a micro-gearbox as set forth in claim 1, wherein: the second buckle structure comprises two second sinking grooves which are oppositely arranged at the edge of the side wall of the second port, and second buckles which are oppositely arranged in the second sinking grooves and are oppositely arranged on the side wall of the output end cover, and the second buckles can respectively extend into the second clamping blocks which are oppositely arranged in the second sinking grooves, and each second clamping block is provided with a second connecting hole for the second buckle to be clamped into.

7. The housing for a micro-gearbox as set forth in claim 6, wherein: the outer end face of the second clamping block is provided with a third guide inclined plane, and a fourth guide inclined plane matched with the third guide inclined plane is arranged on the second clamping buckle.

8. The housing for a micro-gearbox as set forth in claim 7, wherein: the inner wall of the second connecting hole is a third vertical surface, and the second buckle is provided with a fourth vertical surface which is adjacent to the fourth guide inclined surface and can be clamped on the third vertical surface.

9. The casing of the micro-gearbox as set forth in claim 6, 7 or 8, wherein: the output end cover comprises a cover body and a gear ring arranged on the inner end face of the cover body, the diameter of the gear ring is smaller than that of the cover body, an inner hole at the second port is meshed with the gear ring, a second positioning boss is further arranged on the inner end face of the cover body and positioned on the outer side of the gear ring, and a second positioning hole matched with the second positioning boss is formed in the inner gear shell; or,

10. The micro gear box comprises a shell and at least one stage of planetary gear transmission mechanism arranged in the shell, and is characterized in that: the housing is a housing structure of the micro-gearbox of any one of claims 1 to 9.