CN203051684U - Motor gear structure - Google Patents
Motor gear structure Download PDFInfo
- Publication number
- CN203051684U CN203051684U CN 201220725401 CN201220725401U CN203051684U CN 203051684 U CN203051684 U CN 203051684U CN 201220725401 CN201220725401 CN 201220725401 CN 201220725401 U CN201220725401 U CN 201220725401U CN 203051684 U CN203051684 U CN 203051684U
- Authority
- CN
- China
- Prior art keywords
- gear
- axis hole
- flange section
- gear axis
- machine shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Gears, Cams (AREA)
Abstract
A motor gear structure comprises a gear body and a gear shaft hole, wherein a flange section is arranged on the gear body along the outer wall of the front section of the gear shaft hole, and the external diameter of the flange section is smaller or equal to the maximum gear top diameter of the gear body. The motor gear structure solves the problem that when a motor rotating shaft is in press-fit assembling with a gear, the hole wall of the gear shaft hole can easily crack due to uneven stress.
Description
Technical field
The utility model relates to a kind of gear structure, relates in particular to a kind of motor gear structure.
Background technique
The outer end of machine shaft generally all is provided with gear, and motor is by the gear driven mechanical rotation.This just need the assembling of machine shaft and gear very firmly, closely, i.e. interference fit between machine shaft and the bore, otherwise will influence the transmission of torque between machine shaft and the gear.
At present, gear structure commonly used comprises gear body 5 shown in Fig. 1-2, and gear body 5 is provided with gear axis hole 3, and the distance between the inwall of tooth top 1 and gear axis hole 3 be approximately at the bottom of the tooth of gear 2 and the inwall of gear axis hole 3 between the twice of distance.As shown in Figure 2, when machine shaft 4 cooperates with gear axis hole 3, generally by assembly fixture machine shaft 4 is pressed in the gear axis hole 3.But because the tooth top 1 of gear is relative thicker positions at a distance of the inwall of gear axis hole 3, and 2 inwalls at a distance of gear axis hole 3 are relative thinner positions at the bottom of the tooth of gear.Namely when machine shaft and gear press fit arrangement, the discontinuity of gear on the border causes the hole wall cracking of gear axis hole 3, thereby influences the adhesive strength between machine shaft 4 and the gear.And draw through constantly testing, the hole wall cracking of gear axis hole 3 generally appears at and is pressed into end.
Therefore, how designing a kind of motor gear that can satisfy performance requirement, can effectively turn round, and avoid the hole wall cracking of gear axis hole when machine shaft and its press fit arrangement, is those skilled in the art's contents of research emphatically.
Summary of the invention
The utility model provides a kind of motor gear structure, its objective is to solve in the prior art, machine shaft and gear when press fit arrangement, the problem that the hole wall of gear axis hole easily ftractures because of unbalance stress.
For achieving the above object, the technical solution adopted in the utility model is: a kind of motor gear structure, comprise gear body and gear axis hole, described gear body is provided with the flange section along the outer wall of the leading portion of gear axis hole, and the external diameter of this flange section is less than or equal to the maximum tooth top footpath of gear body.
Related content in the technique scheme is explained as follows:
1, in the such scheme, the external diameter of described flange section equals the maximum tooth top footpath of gear body.
2, in the such scheme, when described " along the leading portion of gear axis hole " referred to machine shaft and gear axis hole press fit arrangement, machine shaft was pressed into the extreme direction that is pressed into of gear axis hole.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage:
Because the utility model is provided with the flange section at the leading portion of gear body, then this flange section is pressed on the position of end at the gear axis hole, the wall thickness of axis hole is consistent relatively, overcome at machine shaft and be pressed into when fitting in the gear axis hole, the problem of gear axis hole discontinuity, thus guaranteed that the gear shaft hole inner wall does not ftracture when being pressed into assembling.
Description of drawings
Accompanying drawing 1 is looked schematic representation for the master of prior art middle gear;
Accompanying drawing 2 is machine shaft and gear axis hole assembling schematic representation in the prior art;
Accompanying drawing 3 is looked schematic representation for the master of the utility model gear;
Accompanying drawing 4 is the schematic cross-section of the utility model gear;
Accompanying drawing 5 is pressed into the wall thickness schematic representation of end relative aperture for the utility model gear.
Wherein: 1, tooth top; 2, at the bottom of the tooth; 3, gear axis hole; 4, machine shaft; 5, gear body; 6, flange section.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Embodiment: shown in 3-5, a kind of motor gear structure comprises gear body 5 and gear axis hole 3, and described gear body 5 is provided with flange section 6 along the outer wall of the leading portion of gear axis hole 3, and the external diameter of this flange section 6 is less than or equal to the maximum tooth top footpath of gear body 5.
The external diameter of described flange section 6 equals the maximum tooth top footpath of gear body 5.
When described " along the leading portion of gear axis hole 3 " referred to machine shaft 4 with gear axis hole 3 press fit arrangement, machine shaft 4 was pressed into the extreme direction that is pressed into of gear axis hole 3.
Because the leading portion at gear body 5 is provided with flange section 6, then this flange section 6 is pressed on the position of end at gear axis hole 3, the wall thickness of gear axis hole 3 is consistent relatively, overcome at machine shaft 4(not shown) be pressed into when fitting in the gear axis hole 3, the problem of the inwall discontinuity of gear axis hole 3, thus the inwall that has guaranteed gear axis hole 3 does not ftracture when being pressed into assembling.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technological scheme of formation, all drop within the utility model rights protection scope.
Claims (2)
1. motor gear structure, comprise gear body (5) and gear axis hole (3), it is characterized in that: described gear body (5) is provided with flange section (6) along the outer wall of the leading portion of gear axis hole (3), and the external diameter of this flange section (6) is less than or equal to the maximum tooth top footpath of gear body (5).
2. motor gear structure according to claim 1 is characterized in that: the external diameter of described flange section (6) equals the maximum tooth top footpath of gear body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725401 CN203051684U (en) | 2012-12-26 | 2012-12-26 | Motor gear structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725401 CN203051684U (en) | 2012-12-26 | 2012-12-26 | Motor gear structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051684U true CN203051684U (en) | 2013-07-10 |
Family
ID=48734639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220725401 Expired - Fee Related CN203051684U (en) | 2012-12-26 | 2012-12-26 | Motor gear structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051684U (en) |
-
2012
- 2012-12-26 CN CN 201220725401 patent/CN203051684U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131226 |