CN210120304U - Commutator with reinforcing ring - Google Patents
Commutator with reinforcing ring Download PDFInfo
- Publication number
- CN210120304U CN210120304U CN201921351266.5U CN201921351266U CN210120304U CN 210120304 U CN210120304 U CN 210120304U CN 201921351266 U CN201921351266 U CN 201921351266U CN 210120304 U CN210120304 U CN 210120304U
- Authority
- CN
- China
- Prior art keywords
- commutator
- strengthening
- reinforcing ring
- bakelite powder
- annular
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 52
- 229920001342 Bakelite® Polymers 0.000 claims abstract description 27
- 239000004637 bakelite Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000005728 strengthening Methods 0.000 claims abstract description 20
- 210000004027 cell Anatomy 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 7
- 239000011159 matrix material Substances 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 4
- 208000007101 Muscle Cramp Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a take reinforcing ring commutator, make the commutator segment of circumference equipartition, its characterized in that including bakelite powder base member and at the excircle of bakelite powder base member: the bottom of the commutator segment is provided with a reinforcing ring groove, a reinforcing ring is arranged in the reinforcing ring groove, and the top of the commutator segment is provided with a shallow groove for filling bakelite powder of a bakelite powder matrix; the inboard cell surface of strengthening the annular is the inclined plane, the strengthening ring has the toper hole, and the tapering of toper hole is the same with the inclination on inclined plane, and the toper hole pastes the close contact each other with the inboard trough edge of strengthening the annular, and the bottom terminal surface of bakelite powder base member corresponds the position of strengthening ring and is equipped with the thimble hole. The utility model discloses the unilateral beaded finish that sets up practices thrift the cost to utilize the beaded finish better to realize cramping the center of commutator segment, improve commutator intensity and overspeed performance, and inside loose and the gas pocket that appears when effectively solving the commutator and pressing injection molding.
Description
Technical Field
The utility model relates to a commutator technical field, concretely relates to area adds reinforcing ring commutator.
Background
The commutator is widely applied to electric tools, and in order to improve the mechanical strength and the overspeed performance of the commutator, some commutators with high rotating speed requirements usually adopt upper and lower reinforcing rings to reinforce a commutator segment of the commutator, and the upper and lower reinforcing rings are respectively arranged at the upper and lower ends of the commutator segment, so that higher cost is generated. In addition, the reinforcing rings are randomly placed in reinforcing ring grooves formed in the commutator segments and then limited, and a gap space is formed between each reinforcing ring and each reinforcing ring groove, so that after the commutator is formed by pressure injection, the reinforcing rings cannot perform central hooping on the commutator segments (namely inner holes of the reinforcing rings cannot be in close contact with inner groove edges of the reinforcing ring grooves), and therefore the hooping capability of the reinforcing rings on the commutator segments is insufficient to a certain extent; and because the clearance space between the reinforcing ring groove and the reinforcing ring is small, the bakelite powder entering the clearance space of the commutator during the injection molding process is less, and the bakelite powder matrix of the commutator is easy to loose and have air holes at the position, which can affect the mechanical strength and the overspeed performance of the commutator to a great extent.
Disclosure of Invention
Not enough to prior art exists, the utility model aims at providing a unilateral beaded finish that sets up practices thrift the cost to utilize the beaded finish better to realize cramping the center of commutator segment, improve product strength and overspeed performance, and the loose area beaded finish commutator that reaches the gas pocket that inside appears when effectively solving the product and pressing the injection molding.
The utility model adopts the following technical proposal to complete:
area reinforcing ring commutator includes the bakelite powder base member and makes the commutator segment of circumference equipartition, its characterized in that at the excircle of bakelite powder base member: the commutator segment is provided with a reinforcing ring groove at the bottom, a reinforcing ring is arranged in the reinforcing ring groove, and the top of the commutator segment is provided with a shallow groove for filling bakelite powder of a bakelite powder substrate.
The inboard cell surface of strengthening the annular is the inclined plane, the strengthening ring has the toper hole, and the tapering of toper hole is the same with the inclination on inclined plane, and the toper hole pastes the close contact each other with the inboard trough edge of strengthening the annular, and the bottom terminal surface of bakelite powder base member corresponds the position of strengthening ring and is equipped with the thimble hole.
The taper of the tapered inner hole is 8-12 degrees.
The tank bottom of strengthening the annular is equipped with the dovetail groove, and the opening size in dovetail groove is less than the tank bottom width size of strengthening the annular.
Above-mentioned technical scheme's area reinforcing ring commutator, at first, the reinforcing ring only carries out unilateral setting in the bottom of commutator segment, practices thrift the cost, can guarantee the cohesion between commutator segment and the bakelite powder base member simultaneously, and at this moment because the top and the wire spot welding of commutator segment are connected when using, the wire plays the effect of fixed commutator segment upper end. Secondly, the inboard groove face of strengthening the annular is the inclined plane, and the stiffening ring has the toper hole, and like this when the commutator is carried out the pressure injection molding, under the effect of the last top of mould top to the stiffening ring, the toper hole of stiffening ring can paste the contact each other with the inboard trough rim of strengthening the annular, and then realizes that the stiffening ring cramps the center of commutator segment, improves commutator mechanical strength and overspeed performance, among the above-mentioned technical scheme, the setting of thimble hole is the mould thimble that leaves when the drawing of patterns after the commutator is carried out the pressure injection molding promptly. Simultaneously because the toper hole of reinforcement ring closely pastes the tight contact with the inboard trough rim of reinforcing annular, the reinforcement ring only leaves the space between excircle and the outside trough rim of reinforcing annular, such clearance space size is unified and can have great size, and the tank bottom of reinforcing annular is equipped with the dovetail groove and solves the problem that the clearance is little between reinforcement ring and the reinforcing annular tank bottom, consequently the commutator is when carrying out the pressure injection molding, the bakelite powder of bakelite powder base member gets into more easily and fills, eliminate the loose production of gas pocket in above-mentioned position, better assurance commutator mechanical strength and hypervelocity performance.
Drawings
The utility model discloses there is following figure:
figure 1 is a schematic structural diagram of the present invention,
figure 2 is an enlarged view of portion a of figure 1,
fig. 3 is a schematic structural view of the reinforcement ring.
Detailed Description
As shown in the drawing, the utility model discloses a take reinforcing ring commutator, make the commutator segment 3 of circumference equipartition including bakelite powder base member 1 and at the excircle of bakelite powder base member 1, commutator segment 3 only sets up beaded finish groove 6 in the bottom, places beaded finish 4 in beaded finish groove 6, and the top of commutator segment 3 is equipped with shallow slot 2 and lets bakelite powder base member 1's bakelite powder fill wherein. Strengthen the inboard groove face 61 of annular 6 for the inclined plane, reinforcing ring 4 has toper hole 41, and the tapering of toper hole is 8-12 degrees, and the tapering of toper hole 41 is the same with the inclination on inclined plane, and toper hole 41 pastes the contact with reinforcing ring's inboard trough edge 61 each other closely, carries out the center to commutator segment 3 and cramps, and the bottom terminal surface of bakelite powder base member 1 corresponds the position of reinforcing ring 4 and is equipped with thimble hole 7, the tank bottom of strengthening annular 6 is equipped with dovetail groove 5, and dovetail groove 5's opening size is less than the tank bottom width size of strengthening annular 6.
In the commutator with the reinforcing ring of the technical scheme, when the commutator is molded by pressure injection, firstly, the commutator segment 3 finished by segment arrangement is arranged in the die barrel of the pressure injection die, meanwhile, the thimble at the bottom of the die barrel can prop against the reinforcing ring 4 from the lower direction to enable the reinforcing ring to slightly move upwards, because the inner hole of the reinforcing ring 4 is a tapered hole and the inner side groove surface of the reinforcing ring groove 6 is an inclined surface, the tapered inner hole 41 of the reinforcing ring can be mutually and tightly contacted with the inner side groove surface 61 of the reinforcing ring groove to clamp the commutator segment 3 in the center, a gap with uniform size and larger size is reserved between the excircle of the reinforcing ring 4 and the outer side groove edge of the reinforcing ring groove 6, and the groove bottom of the reinforcing ring groove 6 is provided with the trapezoidal groove 5 to enable the gap between the reinforcing ring 4 and the groove bottom of the reinforcing ring groove 6 to be enlarged, therefore, bakelite powder of the matrix 1 can more easily enter for filling when the commutator is molded by pressure injection, the mechanical strength and the overspeed performance of the commutator are better ensured. After the commutator is subjected to injection molding, the commutator is demolded from the mold barrel of the injection mold, and the ejector pin is simultaneously extracted, so that the ejector pin hole 7 is left on the bakelite powder substrate 1.
Claims (4)
1. Area reinforcing ring commutator includes the bakelite powder base member and makes the commutator segment of circumference equipartition, its characterized in that at the excircle of bakelite powder base member: the commutator segment is provided with a reinforcing ring groove at the bottom, a reinforcing ring is arranged in the reinforcing ring groove, and the top of the commutator segment is provided with a shallow groove for filling bakelite powder of a bakelite powder substrate.
2. The commutator with reinforcing rings of claim 1, wherein: the inboard cell surface of strengthening the annular is the inclined plane, the strengthening ring has the toper hole, and the tapering of toper hole is the same with the inclination on inclined plane, and the toper hole pastes the close contact each other with the inboard trough edge of strengthening the annular, and the bottom terminal surface of bakelite powder base member corresponds the position of strengthening ring and is equipped with the thimble hole.
3. The commutator with reinforcing rings of claim 2, wherein: the taper of the tapered inner hole is 8-12 degrees.
4. The commutator with reinforcing rings of claim 1, wherein: the tank bottom of strengthening the annular is equipped with the dovetail groove, and the opening size in dovetail groove is less than the tank bottom width size of strengthening the annular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351266.5U CN210120304U (en) | 2019-08-20 | 2019-08-20 | Commutator with reinforcing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351266.5U CN210120304U (en) | 2019-08-20 | 2019-08-20 | Commutator with reinforcing ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210120304U true CN210120304U (en) | 2020-02-28 |
Family
ID=69617197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921351266.5U Expired - Fee Related CN210120304U (en) | 2019-08-20 | 2019-08-20 | Commutator with reinforcing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210120304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429440A (en) * | 2019-08-20 | 2019-11-08 | 瑞安市成得电器有限公司 | Band reinforcing ring commutator |
-
2019
- 2019-08-20 CN CN201921351266.5U patent/CN210120304U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429440A (en) * | 2019-08-20 | 2019-11-08 | 瑞安市成得电器有限公司 | Band reinforcing ring commutator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |