CN209885944U - Gear transmission mechanism of paper shredder - Google Patents
Gear transmission mechanism of paper shredder Download PDFInfo
- Publication number
- CN209885944U CN209885944U CN201920396238.9U CN201920396238U CN209885944U CN 209885944 U CN209885944 U CN 209885944U CN 201920396238 U CN201920396238 U CN 201920396238U CN 209885944 U CN209885944 U CN 209885944U
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- transmission gear
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Abstract
The utility model discloses a kneader gear drive mechanism belongs to kneader technical field, and its technical scheme main points are, including first transmission gear, fixed column and casing, first transmission gear fixed connection in the one end of fixed column, first transmission gear with the fixed column is arranged in inside the casing, the fixed column is kept away from the both ends that the one end of first transmission gear was provided with transmission external gear and transmission internal gear set up with fixed column and transmission external gear meshing respectively, the transmission external gear with be provided with the overload protection subassembly between the transmission internal gear, the overload protection subassembly includes quarter butt, spring and limiting plate. The overload protection is realized through the contact and the separation between the limiting plate and the spring. The utility model is suitable for a kneader design.
Description
Technical Field
The utility model relates to a kneader technical field, in particular to kneader gear drive.
Background
At present, in order to properly process waste documents or documents related to company trade secrets, paper containing confidential information is generally cut into strips or chips by a shredder through feeding the paper into the middle of blades engaged with each other, so as to prevent the confidential information from leaking, and thus shredders have been widely used in general offices.
The Chinese patent with publication number CN103089966A discloses a gear for a paper shredder with simple structure and higher reliability, which is characterized in that: the gear is formed by one-time injection molding of a metal ring or a plurality of concentrically distributed metal rings. The shaft hole of the gear and the metal ring are coaxially distributed so as to ensure the reliability and the service life of the gear. The gear for the paper shredder is formed by one-time injection molding of the metal ring, so that the mechanical strength of the gear is improved, and the problem of cracking of the gear of the paper shredder in the using process is solved. Therefore, the device has the characteristics of simple structure, higher reliability and longer service life.
The above prior art solutions have the following drawbacks: generally, when the paper shredder is in use, the phenomenon of overload or overload work of the paper shredder can occur due to excessive paper inserted by a user at one time or too thick paper. Although the problem of cracking of the shredder gear in the using process is solved in the prior art, the stability and the reliability are poor, overload protection is not timely, and the gear is easily damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a kneader gear drive has overload protection's effect.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a gear transmission mechanism of a paper shredder comprises a first transmission gear, a fixed column and a shell, wherein the first transmission gear is fixedly connected with one end of the fixed column, the first transmission gear and the fixed column are arranged in the shell, one end, far away from the first transmission gear, of the fixed column is provided with a transmission external gear and a transmission internal gear, one end of the transmission internal gear is meshed with the fixed column, the other end of the transmission internal gear is meshed with the transmission external gear, one end, far away from the transmission internal gear, of the transmission external gear is meshed with a second transmission gear, one end, far away from the transmission external gear, of the second transmission gear is fixedly connected with a motor, one end, far away from the second transmission gear, of the motor is provided with an ammeter electrically connected with the motor, and an overload protection assembly is arranged, overload protection subassembly includes quarter butt, spring and limiting plate, quarter butt fixed connection keeps away from the one end of first transmission gear in the fixed column, the one end that the fixed column was kept away from to the quarter butt is located to the spring housing, the one end of quarter butt is kept away from in the spring, the arc hole has been seted up to the one end that the transmission internal gear is close to the transmission external gear, the limiting plate is worn to locate in the arc hole, the casing is close to a plurality of connecting holes have been seted up on the periphery in arc hole, the casing outside with the relevant position department butt of connecting hole is provided with first fixed block, fixedly connected with wears to locate on the first fixed block the connecting rod of connecting hole, the connecting rod is kept away from the one end threaded connection of first fixed block has the second fixed block, the second fixed block with.
By adopting the technical scheme, when the gear transmission mechanism of the paper shredder normally operates, the motor drives the second transmission gear to rotate, the second transmission gear is meshed with the transmission external gear, the transmission external gear is meshed with the transmission internal gear, the transmission internal gear is meshed with the fixed column, and the fixed column is fixedly connected with the first transmission gear, so that when the motor operates, the first transmission gear also can normally operate. And when normal operation, the spring is kept away from the one end and the limiting plate butt of quarter butt, and the limiting plate card is located in the arc hole, and the limiting plate of arranging in the arc hole passes through the second fixed block fixedly. When the current value that shows on the ampere meter is greater than the current value of normal operating, this kneader gear drive mechanism overload operation, at this moment, with the vertical removal of the direction of keeping away from transmission internal gear of first fixed block court, the second fixed block breaks away from with transmission internal gear surface, the limiting plate is owing to receive the centrifugal force effect that produces when transmission internal gear rotates, roll-off in the arc hole can be followed, spring and limiting plate break away from promptly, the spring removes the transmission external gear to the direction of keeping away from the fixed column through the resilience force, break away from the meshing between transmission external gear and the transmission internal gear, can make first transmission gear stall, can play overload protection's effect.
Further, the length of the meshing between the internal transmission gear and the fixed column is 1/3-2/5 of the length of the internal transmission gear, and the length of the meshing between the external transmission gear and the internal transmission gear is 1/3-2/5 of the length of the internal transmission gear.
Through adopting above-mentioned technical scheme, set up the meshing length between transmission internal gear and the fixed column to and the meshing length between transmission external gear and the transmission internal gear, can play the effect that plays a support to the transmission internal gear on the one hand, on the other hand, when transmission external gear and transmission internal gear meshing transmission, laborsaving more can. And a gap is formed between the fixed column and the transmission external gear, so that enough rebound space is reserved for the spring.
Furthermore, one end, close to the fixed column, of the transmission internal gear is a first end, one end, close to the transmission external gear, of the transmission internal gear is a second end, the distance between the arc-shaped hole and the first end is 1.1 to 1.3 times of the distance between the arc-shaped hole and the second end, and the length of the spring is 1.4 to 1.6 times of the length of the transmission internal gear.
Through adopting above-mentioned technical scheme, set up the distance between arc hole and the first end, can make the spring have certain compression space to reserve certain resilience space. The length of the spring is set, so that the spring has enough resilience force to push the transmission external gear to one end far away from the fixed column.
Furthermore, the width of arc hole is 1.3 to 1.5 times of limiting plate thickness, the relative one side in arc hole is provided with the rubber pad.
Through adopting above-mentioned technical scheme, when the transmission internal gear was high-speed moving, the limiting plate rocked in the arc hole, produced the vibration, set up the rubber pad, can reduce the vibration that produces between limiting plate and the arc hole.
Further, the ampere meter is kept away from the one end of motor is provided with the control box, the waist type hole that the connecting hole was seted up along casing length direction, the connecting hole with the limiting plate is in projection position on the casing is the starting point to the fixed column direction is seted up, the connecting hole is close to the one end of fixed column is provided with first electro-magnet, be provided with the second electro-magnet on the first fixed block, first electro-magnet with the opposite polarity of second electro-magnet sets up relatively, first electro-magnet with the second electro-magnet all with the control box electricity is connected.
Through adopting above-mentioned technical scheme, during overloading, first electro-magnet and the circular telegram of second electro-magnet will be controlled to the control box, and first electro-magnet will attract the second electro-magnet to remove from the connecting hole towards the direction that is close to first electro-magnet, and the second fixed block breaks away from with the arc hole outer end, and the limiting plate can follow the roll-off in the arc hole, and the spring passes the transmission external gear to the direction of keeping away from the fixed column through the effect of resilience force, makes transmission internal gear and transmission external gear break away from the meshing.
Furthermore, the control box is electrically connected with a first signal lamp and a second signal lamp.
Through adopting above-mentioned technical scheme, when the motor normally operated, first signal lamp scintillation, when the motor transships, the scintillation of second signal lamp made things convenient for the staff to this kneader gear drive's monitoring.
Further, the distance between the second fixing block and the outer surface of the transmission internal gear is 1 mm to 2 mm.
Through adopting above-mentioned technical scheme, reduce the transmission internal gear and receive the second fixed block influence and the resistance that produces at the operation in-process, also can not make the limiting plate roll-off from the arc hole at motor normal operating's in-process simultaneously to can make the better second electro-magnet that attracts of first electro-magnet.
Furthermore, one end of the spring, which is close to the limiting plate, is provided with an end head.
Through adopting above-mentioned technical scheme, the setting of end has reduced direct contact between spring and the limiting plate to reduce the wearing and tearing between spring and the limiting plate.
To sum up, the utility model discloses following beneficial effect has:
1. the spring, the limiting plate, the arc-shaped hole, the connecting hole, the first fixing block and the second fixing block are arranged, so that the overload protection effect can be achieved;
2. the effect of reserving enough rebound space for the spring can be achieved by setting the meshing length between the transmission inner gear and the fixed rod and between the transmission inner gear and the transmission outer gear;
3. through the setting of first signal lamp and second signal lamp, can play the effect that makes things convenient for the staff to this kneader gear drive monitoring.
Drawings
Fig. 1 is a schematic view of the internal overall structure in this embodiment.
Fig. 2 is a schematic view of the overall structure in the present embodiment.
Fig. 3 is an enlarged view of a portion a of fig. 1 for illustrating a connection relationship between the short bar, the spring, and the stopper plate.
Fig. 4 is an enlarged view of a portion B of fig. 1 for embodying a connection relationship between the stopper plate and the arc-shaped hole.
Fig. 5 is an enlarged view of a portion C of fig. 2 for connecting the second fixing block, the first fixing block and the arc-shaped hole.
In the figure, 1, a first transmission gear; 2. fixing a column; 3. a housing; 4. an external transmission gear; 41. a transmission internal gear; 42. an arc-shaped hole; 421. a rubber pad; 43. a second fixed block; 44. connecting holes; 45. a connecting rod; 46. a first fixed block; 47. a first end; 48. a second end; 5. a control box; 6. a second transmission gear; 7. a motor; 71. an ammeter; 8. an overload protection component; 81. a short bar; 82. a spring; 83. a limiting plate; 84. a first electromagnet; 85. a second electromagnet; 9. a first signal lamp; 91. a second signal lamp; 10. and a baffle plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a kneader gear drive, including first drive gear 1, fixed column 2 and casing 3, first drive gear 1 is through casting fixed connection in the one end of fixed column 2, and inside casing 3 was arranged in to first drive gear 1 and fixed column 2. One end of the fixed column 2, which is far away from the first transmission gear 1, is provided with an external transmission gear 4 and an internal transmission gear 41, two ends of the internal transmission gear 41 are respectively meshed with the fixed column 2 and the external transmission gear 4, and the external transmission gear 4 can move along the central axis of the external transmission gear 4. A second transmission gear 6 is meshed with one end, far away from the internal transmission gear 41, of the external transmission gear 4, a motor 7 is fixedly connected to one end, far away from the external transmission gear 4, of the second transmission gear 6, and a sufficient space for the external transmission gear 4 to slide is reserved between the motor 7 and the external transmission gear 4. One end of the motor 7, which is far away from the second transmission gear 6, is provided with an ammeter 71 which is electrically connected with the motor 7 and is used for detecting the current of the motor 7, so that when the motor 7 is found to be overloaded, a worker can take a shutdown measure in time. The length of the meshing of the internal gear 41 and the fixed column 2 is 1/3 to 2/5 of the length of the internal gear 41, and the length of the meshing of the external gear 4 and the internal gear 41 is 1/3 to 2/5 of the length of the internal gear 41. In this embodiment, the length of the mesh between the external transmission gear 4 and the fixed column 2 is 1/3 the length of the internal transmission gear 41, and the length of the mesh between the external transmission gear 4 and the internal transmission gear 41 is 1/3 the length of the internal transmission gear 41. The fixed column 2, the external transmission gear 4 and the internal transmission gear 41 have enough meshing length, so that the connection among the three is more reliable.
As shown in fig. 2 to 5, an overload protection assembly 8 is arranged between the external transmission gear 4 and the internal transmission gear 41, the overload protection assembly 8 includes a short rod 81, a spring 82 and a limit plate 83, the short rod 81 is fixedly connected to one end of the fixed column 2 far away from the first transmission gear 1, the spring 82 is sleeved on one end of the short rod 81 far away from the fixed column 2, the limit plate 83 is located at one end of the spring 82 far away from the short rod 81, and in order to reduce abrasion between the spring 82 and the limit plate 83, an end 10 abutting against the limit plate 83 is arranged at one end of the spring 82 close to the limit plate 83. The length of the spring 82 is 1.4 to 1.6 times the length of the internal gear 41, and in the present embodiment, the length of the spring 82 is 1.6 times the length of the internal gear 41. The one end that transmission internal gear 41 is close to fixed column 2 is first end 47, and the one end that transmission internal gear 41 is close to transmission external gear 4 is second end 48, and the distance between arc hole 42 and the first end 47 is 1.1 to 1.3 times of the distance between arc hole 42 and the second end 48, and in this embodiment, the distance between arc hole 42 and the first end 47 is 1.3 times of the distance between arc hole 42 and the second end 48. The spring 82 can have enough resilience to push the external transmission gear 4 to one end far away from the fixed column 2. The arc-shaped hole 42 is formed in one end, close to the external transmission gear 4, of the internal transmission gear 41, the limiting plate 83 penetrates through the arc-shaped hole 42, the width of the arc-shaped hole 42 is 1.3 to 1.5 times of the thickness of the limiting plate 83, in the embodiment, the width of the arc-shaped hole 42 is 1.5 times of the thickness of the limiting plate 83, and the rubber pad 421 is arranged on the opposite side of the arc-shaped hole 42. When the internal gear 41 runs at a high speed, the limiting plate 83 rocks in the arc-shaped hole 42 to generate vibration, and the rubber pad 421 is arranged to reduce the vibration generated between the limiting plate 83 and the arc-shaped hole 42.
As shown in fig. 5, a plurality of connection holes 44 are formed in the circumferential surface of the housing 3 close to the arc-shaped hole 42, one end of each connection hole 44 close to the internal transmission gear 41 is provided with a second fixing block 43, and the second fixing blocks 43 are uniformly distributed along the circumferential direction of the internal transmission gear 41, so that when the internal transmission gear 41 rotates, the limiting plate 83 is always supported by the second fixing blocks 43, and the limiting plate 83 is not easily separated from the connection holes 44 when the motor 7 normally operates. A connecting rod 45 is arranged between the second fixing block 43 and the connecting hole 44, one end of the connecting rod 45 is in threaded connection with the second fixing block 43, the other end of the connecting rod 45 penetrates through the connecting hole 44, and one end, far away from the second fixing block 43, of the connecting rod 45 is in threaded connection with a first fixing block 46. And the distance between the second fixed block 43 and the outer surface of the internal transmission gear 41 is set to be 1 mm to 2 mm, in this embodiment, the distance between the second fixed block 43 and the outer surface of the internal transmission gear 41 is 2 mm, so that the resistance of the second fixed block 43 to the rotation of the external transmission gear 4 is reduced.
As shown in fig. 5 and fig. 1, a control box 5 is disposed at one end of the ammeter 71 away from the motor 7, the connection hole 44 is a waist-shaped hole formed along the length direction of the housing 3, a first electromagnet 84 is disposed at one end of the connection hole 44 close to the fixing column 2, a second electromagnet 85 is disposed on the first fixing block 46, opposite poles of the first electromagnet 84 and the second electromagnet 85 are disposed oppositely, and both the first electromagnet 84 and the second electromagnet 85 are electrically connected with the control box 5. In case of overload, the second electromagnet 85 can be attracted by the first electromagnet 84 to move from the connection hole 44 toward the first electromagnet 84, and the first fixing block 46 does not need to be manually controlled, thereby saving labor. The control box 5 is electrically connected with a first signal lamp 9 and a second signal lamp 91. When the motor 7 normally operates, the first signal lamp 9 flickers, and when the motor 7 is overloaded, the second signal lamp 91 flickers, so that the monitoring of the working personnel on the gear transmission mechanism of the paper shredder is facilitated.
The implementation principle of the above embodiment is as follows: shredder gear drive mechanism is in normal operating, first signal lamp 9 glimmers, motor 7 drives second drive gear 6 and rotates, through the meshing of second drive gear 6 and transmission external gear 4, transmission external gear 4 and the meshing of transmission internal gear 41, transmission internal gear 41 and the meshing of fixed column 2, fixed column 2 again with first drive gear 1 fixed connection, so when motor 7 moves, first drive gear 1 also can normal operating, the one end and the limiting plate 83 butt of quarter butt 81 are kept away from to spring 82, the limiting plate 83 card is located in arc hole 42, the limiting plate 83 of arranging in arc hole 42 is fixed through second fixed block 43, and first fixed block 46 arranges the one end that connecting hole 44 kept away from fixed column 2 in. When the current value displayed on the ammeter 71 is larger than the current value during normal operation, the shredder gear transmission mechanism runs in an overload mode, at the moment, the second signal lamp 91 flickers, the control box 5 controls the first electromagnet 84 and the second electromagnet 85 to be electrified, the first electromagnet 84 attracts the second electromagnet 85 to move from the connecting hole 44 towards the direction close to the first electromagnet 84, the limiting plate 83 can slide out of the arc-shaped hole 42, the spring 82 pushes the transmission external gear 4 towards the direction far away from the fixed column 2 through the action of resilience force, the transmission internal gear 41 is disengaged from the transmission external gear 4, the first transmission gear 1 stops rotating, and the overload protection function can be achieved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a kneader gear drive, includes first transmission gear (1), fixed column (2) and casing (3), first transmission gear (1) fixed connection in the one end of fixed column (2), first transmission gear (1) with fixed column (2) are arranged in inside casing (3), its characterized in that: one end, far away from the first transmission gear (1), of the fixing column (2) is provided with an external transmission gear (4) and an internal transmission gear (41), one end of the internal transmission gear (41) is meshed with the fixing column (2), the other end of the internal transmission gear (41) is meshed with the external transmission gear (4), one end, far away from the internal transmission gear (41), of the external transmission gear (4) is meshed with a second transmission gear (6), one end, far away from the external transmission gear (4), of the second transmission gear (6) is fixedly connected with a motor (7), one end, far away from the second transmission gear (6), of the motor (7) is provided with an ammeter (71) electrically connected with the motor (7), an overload protection assembly (8) is arranged between the external transmission gear (4) and the internal transmission gear (41), and the overload protection assembly (8) comprises a short rod (81), Spring (82) and limiting plate (83), the one end of first drive gear (1) is kept away from in fixed column (2) short bar (81), the one end of fixed column (2) is kept away from in short bar (81) is located in spring (82) cover, limiting plate (83) butt is kept away from the one end of short bar (81) in spring (82), transmission internal gear (41) are close to the one end of transmission external gear (4) and have been seted up arc hole (42), limiting plate (83) wear to locate in arc hole (42), casing (3) are close to seted up a plurality of connecting holes (44) on the periphery of arc hole (42), casing (3) outside with the relevant position department butt of connecting hole (44) is provided with first fixed block (46), fixedly connected with wears to locate on first fixed block (46) connecting rod (45) of connecting hole (44), one end of the connecting rod (45) far away from the first fixing block (46) is in threaded connection with a second fixing block (43), and the second fixing block (43) is abutted to the outer surface of the transmission internal gear (41).
2. The shredder gear transmission mechanism according to claim 1, characterized in that: the length of the meshing between the internal transmission gear (41) and the fixed column (2) is 1/3-2/5 of the length of the internal transmission gear (41), and the length of the meshing between the external transmission gear (4) and the internal transmission gear (41) is 1/3-2/5 of the length of the internal transmission gear (41).
3. The shredder gear transmission mechanism according to claim 2, characterized in that: one end, close to the fixed column (2), of the transmission internal gear (41) is a first end (47), one end, close to the transmission external gear (4), of the transmission internal gear (41) is a second end (48), the distance between the arc-shaped hole (42) and the first end (47) is 1.1 to 1.3 times of the distance between the arc-shaped hole (42) and the second end (48), and the length of the spring (82) is 1.4 to 1.6 times of the length of the transmission internal gear (41).
4. The shredder gear transmission mechanism according to claim 3, characterized in that: the width of arc hole (42) is 1.3 to 1.5 times of limiting plate (83) thickness, the relative one side in arc hole (42) is provided with rubber pad (421).
5. The shredder gear transmission mechanism according to claim 4, characterized in that: ammeter (71) are kept away from the one end of motor (7) is provided with control box (5), connecting hole (44) are for following the waist type hole that casing (3) length direction was seted up, connecting hole (44) with limiting plate (83) are in projection position on casing (3) is the starting point to fixed column (2) direction is seted up, connecting hole (44) are close to the one end of fixed column (2) is provided with first electro-magnet (84), be provided with second electro-magnet (85) on first fixed block (46), first electro-magnet (84) with the opposite pole of second electro-magnet (85) sets up relatively, first electro-magnet (84) with second electro-magnet (85) all with control box (5) electricity is connected.
6. The shredder gear transmission mechanism according to claim 5, characterized in that: the control box (5) is electrically connected with a first signal lamp (9) and a second signal lamp (91).
7. The shredder gear transmission mechanism according to claim 6, characterized in that: the distance between the second fixing block (43) and the outer surface of the internal transmission gear (41) is 1-2 mm.
8. The shredder gear transmission mechanism according to claim 7, characterized in that: and one end of the spring (82) close to the limiting plate (83) is provided with a head (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396238.9U CN209885944U (en) | 2019-03-26 | 2019-03-26 | Gear transmission mechanism of paper shredder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396238.9U CN209885944U (en) | 2019-03-26 | 2019-03-26 | Gear transmission mechanism of paper shredder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209885944U true CN209885944U (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920396238.9U Expired - Fee Related CN209885944U (en) | 2019-03-26 | 2019-03-26 | Gear transmission mechanism of paper shredder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209885944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044497A (en) * | 2020-08-26 | 2020-12-08 | 杭州揽廉科技有限公司 | Rice mill capable of improving rice milling rate and avoiding over-grinding |
-
2019
- 2019-03-26 CN CN201920396238.9U patent/CN209885944U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044497A (en) * | 2020-08-26 | 2020-12-08 | 杭州揽廉科技有限公司 | Rice mill capable of improving rice milling rate and avoiding over-grinding |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200103 Termination date: 20210326 |