CN109158940B - Torque limiter for electric drill equipment in constructional engineering - Google Patents
Torque limiter for electric drill equipment in constructional engineering Download PDFInfo
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- CN109158940B CN109158940B CN201811352028.6A CN201811352028A CN109158940B CN 109158940 B CN109158940 B CN 109158940B CN 201811352028 A CN201811352028 A CN 201811352028A CN 109158940 B CN109158940 B CN 109158940B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
- B23Q5/58—Safety devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Percussive Tools And Related Accessories (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to the technical field of torque limiters, and particularly relates to a torque limiter used for electric drill equipment in constructional engineering, which comprises an input shaft, a driving shell, an output shaft, a driving blade and steel balls, wherein when people use the electric drill designed by the invention, the input shaft rotates, and the input shaft can drive a driving circular ring to rotate; the driving circular ring can drive the driving shell to rotate through the four limiting trigger blocks; the driving shell drives the output shaft to rotate; namely, the electric drill can be normally used. When the drill bit on the electric drill reaches a high rotating speed in the using process of the electric drill, in order to prevent the drill bit from being broken, the torque on the drill bit needs to be small under the condition, namely the torque of an output shaft on the torque limiter needs to be adjusted to be small; when the rotating speed of the input shaft reaches a certain limit, the driving circular ring is separated from the driving shell; the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft; the torque of the output shaft can be reduced by adjusting the steel ball.
Description
Technical Field
The invention belongs to the technical field of torque limiters, and particularly relates to a torque limiter used for electric drill equipment in constructional engineering.
Background
The torque limiter driven by steel balls at present continuously increases the torque of an output shaft on the torque limiter along with the increasing of the rotating speed of the input shaft on the torque limiter in the using process; therefore, if the bearing torque of the output shaft is larger at high rotating speed during the use process of the torque limiter, the output shaft on the torque limiter can be damaged; affect normal use of the torque limiter; it is therefore highly desirable to design a torque limiter that can provide a lower torque at high rotational speeds at the output shaft.
The invention designs a torque limiter for electric drill equipment in constructional engineering, which solves the problems.
Disclosure of Invention
In order to solve the defects in the prior art, the invention discloses a torque limiter used for electric drill equipment in constructional engineering, which is realized by adopting the following technical scheme.
The utility model provides a torque limiter that building engineering electric drill equipment used which characterized in that: the device comprises an input shaft, a driving shell, an output shaft, driving blades, steel balls, a driving plate, a limiting trigger block, a transmission shaft, a reset spring, a driving circular ring, a circular guide groove, a guide groove, an annular trigger groove, a limiting groove, a trigger block groove, a guide rod, a driving rod, a sliding block, a return spring, a sliding arc block, a connecting plate, a guide block, a square hole, a guide square groove, a trapezoidal annular groove and a trapezoidal ring, wherein four trigger block grooves are uniformly formed in the circumferential direction on the outer circular surface of the driving circular ring; the side surface of the driving ring is provided with a trapezoidal ring groove; the driving circular ring is arranged on the input shaft; the four limiting trigger blocks are respectively arranged in the four trigger block grooves; a return spring is respectively arranged between the four limiting trigger blocks and the four corresponding trigger block grooves; the transmission shaft is arranged on the driving circular ring; two driving blades are symmetrically arranged on the outer circular surface of the transmission shaft; one side of the driving shell is communicated with the outside; four limit grooves are uniformly formed in the circumferential direction on the inner circular surface at the end, communicated with the outside, of the driving shell; the side surfaces of the four limiting grooves are provided with an annular trigger groove; the annular trigger groove is communicated with the outside; an annular groove is formed in one side, close to the limiting groove, of the annular trigger groove; a circular guide groove is formed in the side face of one end, which is not provided with the annular groove, in the driving shell; four guide grooves are uniformly formed in the circumferential direction on the outer circular surface of one end, provided with the annular groove, of the driving shell; the inner circular surface of one end of the driving shell, which is communicated with the outside, is arranged on the outer circular surface of the driving circular ring; the four limit trigger blocks are respectively matched with the four limit grooves, the annular groove and the annular trigger groove; one ends of the four guide rods are uniformly arranged on the outer circular surface of the end, which is not provided with the annular groove, of the driving shell in the circumferential direction; acute included angles are formed between the four guide rods and the axis of the driving shell; the sliding block is provided with a square hole; two guide square grooves are symmetrically formed in the sliding block on two sides of the square hole; the four sliding blocks are respectively arranged on the four guide rods through square holes; one side of the sliding arc block is provided with a guide block; the four sliding arc blocks are respectively arranged on the outer circular surface of the driving shell through the matching of the guide blocks and the four guide grooves on the outer circular surface of the driving shell; a return spring is respectively arranged between each of the four sliding arc blocks and the corresponding four guide grooves; the eight driving rods are arranged on the four sliding arc blocks in pairs in a group respectively, and two driving rods in each group of driving rods respectively penetrate through the two guide square grooves on the corresponding sliding blocks; one end of each of the four connecting plates is respectively arranged on the four arc-shaped sliding blocks; the driving plate is arranged on the input shaft; the driving plate is connected with the other ends of the four connecting plates; a trapezoidal ring is arranged on one side of the driving plate close to the driving ring and matched with a trapezoidal ring groove on the driving ring; a plurality of steel balls are arranged between the inner circular surface of the driving shell and the outer circular surface of the transmission shaft; steel balls between the driving shell and the transmission shaft are matched with the two driving blades; the output shaft is arranged on the end face of the side, which is not communicated with the outside, of the driving shell.
As a further improvement of the technology, the limiting trigger block is provided with a U-shaped groove; the U-shaped groove on the limiting trigger block is respectively matched with the four limiting grooves, the annular groove and the annular trigger groove.
As a further improvement of the technology, in an initial state, one ends of the four limit trigger blocks are respectively positioned in the four limit grooves.
As a further improvement of the technology, when the U-shaped grooves on the four limiting trigger blocks are just moved to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, the driving shell cannot generate motion interference with the driving ring when the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft.
As a further improvement of the technology, before the U-shaped grooves on the four limiting trigger blocks move to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, the sliding blocks do not move under the action of the friction force of the corresponding guide rods and the elastic force of the return springs.
Compared with the traditional torque limiter technology, the torque limiter designed by the invention can enable an output shaft of the torque limiter to have lower torque at high rotating speed through automatic adjustment; the output shaft on the torque limiter is prevented from being damaged due to the large bearing torque of the output shaft at high rotation speed.
Four trigger block grooves are uniformly formed in the circumferential direction on the outer circular surface of the driving circular ring; the side surface of the driving ring is provided with a trapezoidal ring groove; the driving circular ring is arranged on the input shaft; the four limiting trigger blocks are respectively arranged in the four trigger block grooves; a return spring is respectively arranged between the four limiting trigger blocks and the four corresponding trigger block grooves; the transmission shaft is arranged on the driving circular ring; two driving blades are symmetrically arranged on the outer circular surface of the transmission shaft; one side of the driving shell is communicated with the outside; four limit grooves are uniformly formed in the circumferential direction on the inner circular surface at the end, communicated with the outside, of the driving shell; the side surfaces of the four limiting grooves are provided with an annular trigger groove; the annular trigger groove is communicated with the outside; an annular groove is formed in one side, close to the limiting groove, of the annular trigger groove; a circular guide groove is formed in the side face of one end, which is not provided with the annular groove, in the driving shell; four guide grooves are uniformly formed in the circumferential direction on the outer circular surface of one end, provided with the annular groove, of the driving shell; the inner circular surface of one end of the driving shell, which is communicated with the outside, is arranged on the outer circular surface of the driving circular ring; the four limit trigger blocks are respectively matched with the four limit grooves, the annular groove and the annular trigger groove; one ends of the four guide rods are uniformly arranged on the outer circular surface of the end, which is not provided with the annular groove, of the driving shell in the circumferential direction; acute included angles are formed between the four guide rods and the axis of the driving shell; the sliding block is provided with a square hole; two guide square grooves are symmetrically formed in the sliding block on two sides of the square hole; the four sliding blocks are respectively arranged on the four guide rods through square holes; one side of the sliding arc block is provided with a guide block; the four sliding arc blocks are respectively arranged on the outer circular surface of the driving shell through the matching of the guide blocks and the four guide grooves on the outer circular surface of the driving shell; a return spring is respectively arranged between each of the four sliding arc blocks and the corresponding four guide grooves; the eight driving rods are arranged on the four sliding arc blocks in pairs in a group respectively, and two driving rods in each group of driving rods respectively penetrate through the two guide square grooves on the corresponding sliding blocks; one end of each of the four connecting plates is respectively arranged on the four arc-shaped sliding blocks; the driving plate is arranged on the input shaft; the driving plate is connected with the other ends of the four connecting plates; a trapezoidal ring is arranged on one side of the driving plate close to the driving ring and matched with a trapezoidal ring groove on the driving ring; a plurality of steel balls are arranged between the inner circular surface of the driving shell and the outer circular surface of the transmission shaft; steel balls between the driving shell and the transmission shaft are matched with the two driving blades; the output shaft is arranged on the end face of the side, which is not communicated with the outside, of the driving shell. In the invention, a U-shaped groove is formed on a limiting trigger block; the U-shaped groove on the limiting trigger block is respectively matched with the four limiting grooves, the annular groove and the annular trigger groove. In an initial state, one ends of the four limiting trigger blocks are respectively positioned in the four limiting grooves. When the U-shaped grooves on the four limiting trigger blocks are just moved to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, the driving shell cannot generate motion interference with the driving ring when the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft. The U-shaped grooves on the four limiting trigger blocks are moved to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, and the sliding blocks do not move under the action of the friction force of the corresponding guide rods and the elastic force of the return springs. When people use the electric drill designed by the invention, the input shaft rotates, and the input shaft can drive the driving circular ring to rotate; in an initial state, one end of each of the four limiting trigger blocks is respectively positioned in the four limiting grooves, so that the driving circular ring rotates to drive the driving shell to rotate through the four limiting trigger blocks; the driving shell drives the output shaft to rotate; namely, the electric drill can be normally used. When the drill bit on the electric drill reaches a high rotating speed in the using process of the electric drill, in order to prevent the drill bit from being broken, the torque on the drill bit needs to be small under the condition, namely the torque of an output shaft on the torque limiter needs to be adjusted to be small; when the rotating speed of the input shaft reaches a certain limit, the limit trigger block arranged on the driving ring moves under the centrifugal action; the driving ring can drive the transmission shaft to rotate; the transmission shaft rotates to drive the two driving blades to rotate; the two driving blades rotate to drive the steel balls between the driving shell and the transmission shaft to rotate around the axis of the transmission shaft; the steel balls between the driving shell and the transmission shaft rotate around the axis of the transmission shaft and drive the driving shell to rotate through friction; when the U-shaped grooves on the four limiting trigger blocks just move to be completely matched with the limiting grooves on the driving shell, the driving shell cannot generate motion interference with the driving circular ring when the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft. When the U-shaped grooves on the four limiting trigger blocks just move to be completely matched with the limiting grooves on the driving shell in the moving process of the four limiting trigger blocks, the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft and cannot interfere with the driving circular ring; the driving shell rotates to drive the output shaft to rotate; namely, the electric drill can be normally used. Moreover, the rotating speed of the input shaft is continuously increased, so that the rotating speed of the driving shell is also continuously increased; the rotating speed of the driving shell is continuously increased, so that the four sliding blocks arranged on the four guide rods continuously move to one side far away from the axis of the driving shell under the centrifugal action; and the four sliders are moved to cause the four driving rods corresponding to the four sliders to move toward one side of the input shaft; the four driving rods move to drive the four sliding arc blocks to move towards one side of the input shaft; the four sliding arc blocks move to drive the corresponding four connecting plates to move towards one side of the input shaft; the four connecting plates move to drive the driving plate to move towards one side far away from the output shaft; the driving plate moves to drive the driving circular ring to move towards one side far away from the output shaft through the trapezoidal ring; the driving ring moves to enlarge the space between the driving ring and the end surface of the driving shell on the side provided with the circular guide groove; namely, the space where the steel ball between the driving shell and the transmission shaft is positioned is enlarged; thereby reducing the contact probability of the two driving blades and the steel balls between the driving shell and the transmission shaft; namely, the torque transmitted by the two driving blades to the driving shell becomes smaller; the higher the rotating speed of the input shaft is, the longer the distance of the sliding block moving under the centrifugal action is; namely, the larger the distance that the driving plate drives the driving ring to move; the smaller the torque transmitted by the two driving blades to the driving shell is; thereby the effect that the moment of torsion of output shaft constantly reduces when the rotational speed of input shaft constantly improves has been reached. According to the invention, before the U-shaped grooves on the four limiting trigger blocks move to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, the sliding block does not move under the action of the friction force of the corresponding guide rod and the elastic force of the return spring; the function of the driving device is to prevent the influence of the movement of the sliding block on the driving circular ring in the initial rotation process, thereby influencing the torque transmitted by the two driving blades to the driving shell. In the invention, the space where the steel balls between the driving shell and the transmission shaft are located is unchanged before the U-shaped grooves on the four limiting trigger blocks move to be completely matched with the limiting grooves on the driving shell, so that the torque transmitted from the input shaft to the output shaft is unchanged.
When people use the electric drill designed by the invention, the input shaft rotates, and the input shaft can drive the driving circular ring to rotate; in an initial state, one end of each of the four limiting trigger blocks is respectively positioned in the four limiting grooves, so that the driving circular ring rotates to drive the driving shell to rotate through the four limiting trigger blocks; the driving shell drives the output shaft to rotate; namely, the electric drill can be normally used. When the drill bit on the electric drill reaches a high rotating speed in the using process of the electric drill, in order to prevent the drill bit from being broken, the torque on the drill bit needs to be small under the condition, namely the torque of an output shaft on the torque limiter needs to be adjusted to be small; when the rotating speed of the input shaft reaches a certain limit, the limit trigger block arranged on the driving ring moves under the centrifugal action; the driving ring can drive the transmission shaft to rotate; the transmission shaft rotates to drive the two driving blades to rotate; the two driving blades rotate to drive the steel balls between the driving shell and the transmission shaft to rotate around the axis of the transmission shaft; the steel balls between the driving shell and the transmission shaft rotate around the axis of the transmission shaft and drive the driving shell to rotate through friction; when the U-shaped grooves on the four limiting trigger blocks just move to be completely matched with the limiting grooves on the driving shell, the driving shell cannot generate motion interference with the driving circular ring when the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft. When the U-shaped grooves on the four limiting trigger blocks just move to be completely matched with the limiting grooves on the driving shell in the moving process of the four limiting trigger blocks, the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft and cannot interfere with the driving circular ring; the driving shell rotates to drive the output shaft to rotate; namely, the electric drill can be normally used. Moreover, the rotating speed of the input shaft is continuously increased, so that the rotating speed of the driving shell is also continuously increased; the rotating speed of the driving shell is continuously increased, so that the four sliding blocks arranged on the four guide rods continuously move to one side far away from the axis of the driving shell under the centrifugal action; and the four sliders are moved to cause the four driving rods corresponding to the four sliders to move toward one side of the input shaft; the four driving rods move to drive the four sliding arc blocks to move towards one side of the input shaft; the four sliding arc blocks move to drive the corresponding four connecting plates to move towards one side of the input shaft; the four connecting plates move to drive the driving plate to move towards one side far away from the output shaft; the driving plate moves to drive the driving circular ring to move towards one side far away from the output shaft through the trapezoidal ring; the driving ring moves to enlarge the space between the driving ring and the end surface of the driving shell on the side provided with the circular guide groove; namely, the space where the steel ball between the driving shell and the transmission shaft is positioned is enlarged; thereby reducing the contact probability of the two driving blades and the steel balls between the driving shell and the transmission shaft; namely, the torque transmitted by the two driving blades to the driving shell becomes smaller; the higher the rotating speed of the input shaft is, the longer the distance of the sliding block moving under the centrifugal action is; namely, the larger the distance that the driving plate drives the driving ring to move; the smaller the torque transmitted by the two driving blades to the driving shell is; thereby the effect that the moment of torsion of output shaft constantly reduces when the rotational speed of input shaft constantly improves has been reached.
Drawings
Fig. 1 is an external view of an entire part.
Fig. 2 is a schematic view of the internal distribution of the integral unit.
Fig. 3 is a schematic view of the internal structure of the integral unit.
Fig. 4 is a schematic view of the guide bar installation.
Fig. 5 is a schematic view of the structure of the driving case.
Fig. 6 is a schematic view of the internal structure of the drive case.
Fig. 7 is a schematic view of a sliding arc block installation.
Fig. 8 is a schematic view of a sliding arc block structure.
Fig. 9 is a schematic view of a slider structure.
FIG. 10 is a schematic view of the engagement of the driver blade with the steel ball.
FIG. 11 is a drive blade installation schematic.
Fig. 12 is a schematic view of the installation of a spacing trigger block.
Fig. 13 is a schematic diagram of the distribution of the limit trigger blocks.
FIG. 14 is a schematic view of a trapezoidal groove configuration.
Fig. 15 is a schematic diagram of a spacing trigger block structure.
Fig. 16 is a schematic view of the installation of the ladder rings.
Fig. 17 is a schematic diagram of output shaft torque variation.
Number designation in the figures: 1. an input shaft; 2. a drive case; 3. an output shaft; 4. a driving blade; 5. steel balls; 6. a drive plate; 7. a limiting trigger block; 8. a drive shaft; 9. a return spring; 10. a drive ring; 11. a circular guide groove; 12. a guide groove; 13. an annular groove; 14. an annular trigger groove; 15. a limiting groove; 16. a trigger block slot; 17. a guide bar; 18. a drive rod; 19. a slider; 20. a return spring; 21. sliding the arc block; 22. a connecting plate; 23. a guide block; 24. a square hole; 25. a guide square groove; 26. a U-shaped groove; 27. a trapezoidal ring groove; 28. a ladder ring.
Detailed Description
As shown in fig. 1 and 2, the driving device comprises an input shaft 1, a driving shell 2, an output shaft 3, a driving blade 4, steel balls 5, a driving plate 6, a limiting trigger block 7, a transmission shaft 8, a return spring 9, a driving ring 10, a circular guide groove, a guide groove 12, an annular groove 13, an annular trigger groove 14, a limiting groove 15, a trigger block groove 16, a guide rod 17, a driving rod 18, a sliding block 19, a return spring 20, a sliding arc block 21, a connecting plate 22, a guide block 23, a square hole 24, a guide square groove 25, a trapezoidal annular groove 27 and a trapezoidal ring 28, wherein as shown in fig. 14, four trigger block grooves 16 are uniformly formed in the circumferential direction on the outer circumferential surface of the driving ring 10; the side surface of the driving ring 10 is provided with a trapezoidal ring groove 27; the driving ring 10 is installed on the input shaft 1; as shown in fig. 13, four limit trigger blocks 7 are respectively installed in four trigger block grooves 16; a return spring 9 is respectively arranged between the four limit trigger blocks 7 and the corresponding four trigger block grooves 16; as shown in fig. 3, the drive shaft 8 is mounted on a drive ring 10; two driving blades 4 are symmetrically arranged on the outer circular surface of the transmission shaft 8; as shown in fig. 5, one side of the driving housing 2 communicates with the outside; four limit grooves 15 are uniformly formed in the circumferential direction on the inner circular surface at one end of the driving shell 2, which is communicated with the outside; as shown in fig. 6, the side surfaces of the four limiting grooves 15 are provided with an annular trigger groove 14; the annular trigger groove 14 is communicated with the outside; an annular groove 13 is formed in one side, close to the limiting groove 15, of the annular trigger groove 14; the side surface of the end, which is not provided with the annular groove 13, in the driving shell 2 is provided with a circular guide groove 11; four guide grooves 12 are uniformly arranged on the circumferential direction of the outer circular surface of the end of the driving shell 2, which is provided with the annular groove 13; as shown in fig. 3, the inner circular surface of the end of the driving case 2 communicating with the outside is installed on the outer circular surface of the driving ring 10; as shown in fig. 12, the four limit trigger blocks 7 are respectively matched with the four limit grooves 15, the annular groove 13 and the annular trigger groove 14; as shown in fig. 4, one end of each of the four guide rods 17 is circumferentially and uniformly mounted on the outer circumferential surface of the end of the driving case 2 where the annular groove 13 is not formed; acute included angles are formed between the four guide rods 17 and the axis of the driving shell 2; as shown in fig. 9, the slider 19 has a square hole 24; two guide square grooves 25 are symmetrically formed in the sliding block 19 at two sides of the square hole 24; as shown in fig. 1, four sliders 19 are respectively mounted on the four guide rods 17 through square holes 24; as shown in fig. 8, a guide block 23 is installed at one side of the sliding arc block 21; as shown in fig. 3, four sliding arc blocks 21 are respectively mounted on the outer circumferential surface of the driving case 2 by the cooperation of the guide blocks 23 with the four guide grooves 12 on the outer circumferential surface of the driving case 2; a return spring 20 is respectively arranged between the four sliding arc blocks 21 and the corresponding four guide grooves 12; the eight driving rods 18 are respectively arranged on the four sliding arc blocks 21 in pairs, and two driving rods 18 in each group of driving rods 18 respectively pass through the two guide square grooves 25 on the corresponding sliding blocks 19; one end of each of the four connecting plates 22 is respectively arranged on the four arc-shaped sliding blocks 19; as shown in fig. 3, the drive plate 6 is mounted on the input shaft 1; as shown in fig. 7, the driving board 6 is connected to the other ends of the four connecting plates 22; as shown in fig. 16, a ladder-shaped ring 28 is mounted on one side of the driving plate 6 close to the driving ring 10, and the ladder-shaped ring 28 is engaged with a ladder-shaped ring groove on the driving ring 10; as shown in fig. 11, a plurality of steel balls 5 are provided between the inner circumferential surface of the drive case 2 and the outer circumferential surface of the drive shaft 8; as shown in fig. 10, the steel balls 5 between the driving shell 2 and the transmission shaft 8 are matched with the two driving blades 4; as shown in fig. 1, the output shaft 3 is mounted on the end surface of the drive case 2 on the side not communicating with the outside.
As shown in fig. 15, the limiting trigger block 7 is provided with a U-shaped groove 26; the U-shaped grooves 26 on the limit trigger block are respectively matched with the four limit grooves 15, the annular groove 13 and the annular trigger groove 14.
In the initial state, one end of each of the four limit trigger blocks 7 is located in each of the four limit grooves 15.
When the U-shaped grooves 26 on the four limit trigger blocks 7 are just moved to be completely matched with the limit grooves 15 on the driving shell 2 under the rotation of the input shaft 1, the driving shell 2 cannot generate motion interference with the driving ring 10 when the driving shell 2 rotates under the friction action of steel balls between the driving shell 2 and the transmission shaft 8.
The slide block 19 is not moved under the friction force of the corresponding guide rod 17 and the elastic force of the return spring 20 before the U-shaped grooves 26 on the four limit trigger blocks 7 are moved to be completely matched with the limit grooves 15 on the driving shell 2 under the rotation of the input shaft 1.
In summary, the following steps:
the torque limiter designed by the invention can enable the output shaft 3 of the torque limiter to have lower torque at high rotating speed through automatic adjustment; the output shaft 3 on the torque limiter is prevented from being damaged because the bearing torque of the output shaft 3 is large at a high rotation speed.
Four trigger block grooves 16 are uniformly formed in the circumferential direction on the outer circular surface of the driving circular ring 10; the side surface of the driving ring 10 is provided with a trapezoidal ring groove 27; the driving ring 10 is installed on the input shaft 1; the four limiting trigger blocks 7 are respectively arranged in the four trigger block grooves 16; a return spring 9 is respectively arranged between the four limit trigger blocks 7 and the corresponding four trigger block grooves 16; the transmission shaft 8 is arranged on the driving circular ring 10; two driving blades 4 are symmetrically arranged on the outer circular surface of the transmission shaft 8; one side of the driving shell 2 is communicated with the outside; four limit grooves 15 are uniformly formed in the circumferential direction on the inner circular surface at one end of the driving shell 2, which is communicated with the outside; the side surfaces of the four limiting grooves 15 are provided with an annular trigger groove 14; the annular trigger groove 14 is communicated with the outside; an annular groove 13 is formed in one side, close to the limiting groove 15, of the annular trigger groove 14; the side surface of the end, which is not provided with the annular groove 13, in the driving shell 2 is provided with a circular guide groove 11; four guide grooves 12 are uniformly arranged on the circumferential direction of the outer circular surface of the end of the driving shell 2, which is provided with the annular groove 13; the inner circle surface of one end of the driving shell 2 communicated with the outside is arranged on the outer circle surface of the driving ring 10; the four limit trigger blocks 7 are respectively matched with the four limit grooves 15, the annular groove 13 and the annular trigger groove 14; one ends of the four guide rods 17 are uniformly arranged on the outer circular surface of the driving shell 2 at the end which is not provided with the annular groove 13 in the circumferential direction; acute included angles are formed between the four guide rods 17 and the axis of the driving shell 2; the slide block 19 is provided with a square hole 24; two guide square grooves 25 are symmetrically formed in the sliding block 19 at two sides of the square hole 24; the four sliding blocks 19 are respectively arranged on the four guide rods 17 through square holes 24; one side of the sliding arc block 21 is provided with a guide block 23; the four sliding arc blocks 21 are respectively installed on the outer circular surface of the driving shell 2 through the matching of the guide blocks 23 and the four guide grooves 12 on the outer circular surface of the driving shell 2; a return spring 20 is respectively arranged between the four sliding arc blocks 21 and the corresponding four guide grooves 12; the eight driving rods 18 are respectively arranged on the four sliding arc blocks 21 in pairs, and two driving rods 18 in each group of driving rods 18 respectively pass through the two guide square grooves 25 on the corresponding sliding blocks 19; one end of each of the four connecting plates 22 is respectively arranged on the four arc-shaped sliding blocks 19; a drive plate 6 is mounted on the input shaft 1; the driving plate 6 is connected with the other ends of the four connecting plates 22; a trapezoidal ring 28 is arranged on one side of the driving plate 6 close to the driving ring 10, and the trapezoidal ring 28 is matched with a trapezoidal ring groove on the driving ring 10; a plurality of steel balls 5 are arranged between the inner circular surface of the driving shell 2 and the outer circular surface of the transmission shaft 8; the steel balls 5 between the driving shell 2 and the transmission shaft 8 are matched with the two driving blades 4; the output shaft 3 is installed on the end surface of the driving shell 2 on the side which is not communicated with the outside. In the invention, a U-shaped groove 26 is formed on the limiting trigger block 7; the U-shaped grooves 26 on the limit trigger block are respectively matched with the four limit grooves 15, the annular groove 13 and the annular trigger groove 14. In the initial state, one end of each of the four limit trigger blocks 7 is located in each of the four limit grooves 15. When the U-shaped grooves 26 on the four limit trigger blocks 7 are just moved to be completely matched with the limit grooves 15 on the driving shell 2 under the rotation of the input shaft 1, the driving shell 2 cannot generate motion interference with the driving ring 10 when the driving shell 2 rotates under the friction action of steel balls between the driving shell 2 and the transmission shaft 8. The slide block 19 is not moved under the friction force of the corresponding guide rod 17 and the elastic force of the return spring 20 before the U-shaped grooves 26 on the four limit trigger blocks 7 are moved to be completely matched with the limit grooves 15 on the driving shell 2 under the rotation of the input shaft 1. When people use the electric drill designed by the invention, the input shaft 1 rotates, and the input shaft 1 can drive the driving circular ring 10 to rotate; in an initial state, one end of each of the four limiting trigger blocks 7 is located in each of the four limiting grooves 15, so that the driving ring 10 rotates to drive the driving shell 2 to rotate through the four limiting trigger blocks 7; the driving shell 2 drives the output shaft 3 to rotate; namely, the electric drill can be normally used. When the drill bit on the electric drill reaches a high rotating speed in the using process of the electric drill, in order to prevent the drill bit from being broken, the torque on the drill bit needs to be small, namely the torque of the output shaft 3 on the torque limiter needs to be adjusted to be small; when the rotating speed of the input shaft 1 reaches a certain limit, the limit trigger block 7 arranged on the driving ring 10 moves under the centrifugal action; the driving ring 10 rotates to drive the transmission shaft 8 to rotate; the transmission shaft 8 rotates to drive the two driving blades 4 to rotate; the two driving blades 4 rotate to drive the steel balls 5 between the driving shell 2 and the transmission shaft 8 to rotate around the axis of the transmission shaft 8; the steel balls 5 between the driving shell 2 and the transmission shaft 8 rotate around the axis of the transmission shaft 8 to drive the driving shell 2 to rotate through friction; when the U-shaped grooves 26 on the four limit trigger blocks 7 are just moved to be completely matched with the limit grooves 15 on the driving shell 2, the driving shell 2 cannot generate motion interference with the driving ring 10 when the driving shell 2 rotates under the friction action of the steel balls between the driving shell 2 and the transmission shaft 8. Therefore, when the U-shaped grooves 26 on the four limit trigger blocks 7 just move to be completely matched with the limit grooves 15 on the driving shell 2 in the moving process of the four limit trigger blocks 7, the driving shell 2 rotates under the friction action of the steel balls 5 between the driving shell 2 and the transmission shaft 8 and cannot interfere with the driving circular ring 10; the driving shell 2 rotates to drive the output shaft 3 to rotate; namely, the electric drill can be normally used. Moreover, the rotating speed of the input shaft 1 is continuously increased, so that the rotating speed of the driving shell 2 is also continuously increased; the increasing of the rotation speed of the driving shell 2 can make the four sliding blocks 19 installed on the four guide rods 17 move towards the side far away from the axis of the driving shell 2 continuously under the centrifugal action; and the four sliders 19 are moved so that the four driving levers 18 corresponding to the four sliders 19 are moved toward one side of the input shaft 1; the four driving rods 18 move to drive the four sliding arc blocks 21 to move towards one side of the input shaft 1; the four sliding arc blocks 21 move to drive the corresponding four connecting plates 22 to move towards one side of the input shaft 1; the four connecting plates 22 move to drive the driving plate 6 to move towards the side far away from the output shaft 3; the driving plate 6 moves to drive the driving ring 10 to move towards the side far away from the output shaft 3 through the ladder-shaped ring 28; the driving ring 10 moves to enlarge the space between the driving ring and the end surface of the driving shell 2 on the side of the circular guide groove 11; namely, the space where the steel ball 5 between the driving shell 2 and the transmission shaft 8 is positioned is enlarged; so that the contact probability of the two driving blades 4 and the steel balls 5 between the driving shell 2 and the transmission shaft 8 becomes smaller; namely, the torque transmitted by the two driving blades 4 to the driving shell 2 becomes smaller; and the higher the rotation speed of the input shaft 1, the longer the distance the slide block 19 moves under the centrifugal action; namely, the driving plate 6 drives the driving ring 10 to move for a larger distance; the smaller the torque transmitted by the two driving blades 4 to the driving shell 2; thereby achieving the effect that the torque of the output shaft 3 is reduced continuously when the rotating speed of the input shaft 1 is increased continuously. In the invention, before the U-shaped grooves 26 on the four limit trigger blocks 7 move to be completely matched with the limit grooves 15 on the driving shell 2 under the rotation of the input shaft 1, the sliding block 19 does not move under the action of the friction force of the corresponding guide rod 17 and the elastic force of the return spring 20; the function of which is to prevent the slider 19 from moving during the initial rotation affecting the drive ring 10 and thus the torque transmitted by the two drive blades 4 to the drive shell 2. As shown in fig. 17, in the present invention, the space where the steel balls 5 are located between the driving shell 2 and the transmission shaft 8 is not changed before the U-shaped grooves 26 on the four limit triggering blocks 7 move to be completely matched with the limit grooves 15 on the driving shell 2, so that the torque transmitted from the input shaft 1 to the output shaft 3 is not changed.
The specific implementation mode is as follows: when people use the electric drill designed by the invention, the input shaft 1 rotates, and the input shaft 1 can drive the driving circular ring 10 to rotate; in an initial state, one end of each of the four limiting trigger blocks 7 is located in each of the four limiting grooves 15, so that the driving ring 10 rotates to drive the driving shell 2 to rotate through the four limiting trigger blocks 7; the driving shell 2 drives the output shaft 3 to rotate; namely, the electric drill can be normally used. When the drill bit on the electric drill reaches a high rotating speed in the using process of the electric drill, in order to prevent the drill bit from being broken, the torque on the drill bit needs to be small, namely the torque of the output shaft 3 on the torque limiter needs to be adjusted to be small; when the rotating speed of the input shaft 1 reaches a certain limit, the limit trigger block 7 arranged on the driving ring 10 moves under the centrifugal action; the driving ring 10 rotates to drive the transmission shaft 8 to rotate; the transmission shaft 8 rotates to drive the two driving blades 4 to rotate; the two driving blades 4 rotate to drive the steel balls 5 between the driving shell 2 and the transmission shaft 8 to rotate around the axis of the transmission shaft 8; the steel balls 5 between the driving shell 2 and the transmission shaft 8 rotate around the axis of the transmission shaft 8 to drive the driving shell 2 to rotate through friction; when the U-shaped grooves 26 on the four limit trigger blocks 7 are just moved to be completely matched with the limit grooves 15 on the driving shell 2, the driving shell 2 cannot generate motion interference with the driving ring 10 when the driving shell 2 rotates under the friction action of the steel balls between the driving shell 2 and the transmission shaft 8. Therefore, when the U-shaped grooves 26 on the four limit trigger blocks 7 just move to be completely matched with the limit grooves 15 on the driving shell 2 in the moving process of the four limit trigger blocks 7, the driving shell 2 rotates under the friction action of the steel balls 5 between the driving shell 2 and the transmission shaft 8 and cannot interfere with the driving circular ring 10; the driving shell 2 rotates to drive the output shaft 3 to rotate; namely, the electric drill can be normally used. Moreover, the rotating speed of the input shaft 1 is continuously increased, so that the rotating speed of the driving shell 2 is also continuously increased; the increasing of the rotation speed of the driving shell 2 can make the four sliding blocks 19 installed on the four guide rods 17 move towards the side far away from the axis of the driving shell 2 continuously under the centrifugal action; and the four sliders 19 are moved so that the four driving levers 18 corresponding to the four sliders 19 are moved toward one side of the input shaft 1; the four driving rods 18 move to drive the four sliding arc blocks 21 to move towards one side of the input shaft 1; the four sliding arc blocks 21 move to drive the corresponding four connecting plates 22 to move towards one side of the input shaft 1; the four connecting plates 22 move to drive the driving plate 6 to move towards the side far away from the output shaft 3; the driving plate 6 moves to drive the driving ring 10 to move towards the side far away from the output shaft 3 through the ladder-shaped ring 28; the driving ring 10 moves to enlarge the space between the driving ring and the end surface of the driving shell 2 on the side of the circular guide groove 11; namely, the space where the steel ball 5 between the driving shell 2 and the transmission shaft 8 is positioned is enlarged; so that the contact probability of the two driving blades 4 and the steel balls 5 between the driving shell 2 and the transmission shaft 8 becomes smaller; namely, the torque transmitted by the two driving blades 4 to the driving shell 2 becomes smaller; and the higher the rotation speed of the input shaft 1, the longer the distance the slide block 19 moves under the centrifugal action; namely, the driving plate 6 drives the driving ring 10 to move for a larger distance; the smaller the torque transmitted by the two driving blades 4 to the driving shell 2; thereby achieving the effect that the torque of the output shaft 3 is reduced continuously when the rotating speed of the input shaft 1 is increased continuously.
Claims (3)
1. The utility model provides a torque limiter that building engineering electric drill equipment used which characterized in that: the device comprises an input shaft, a driving shell, an output shaft, driving blades, steel balls, a driving plate, a limiting trigger block, a transmission shaft, a reset spring, a driving circular ring, a circular guide groove, a guide groove, an annular trigger groove, a limiting groove, a trigger block groove, a guide rod, a driving rod, a sliding block, a return spring, a sliding arc block, a connecting plate, a guide block, a square hole, a guide square groove, a trapezoidal annular groove and a trapezoidal ring, wherein four trigger block grooves are uniformly formed in the circumferential direction on the outer circular surface of the driving circular ring; the side surface of the driving ring is provided with a trapezoidal ring groove; the driving circular ring is arranged on the input shaft; the four limiting trigger blocks are respectively arranged in the four trigger block grooves; a return spring is respectively arranged between the four limiting trigger blocks and the four corresponding trigger block grooves; the transmission shaft is arranged on the driving circular ring; two driving blades are symmetrically arranged on the outer circular surface of the transmission shaft; one side of the driving shell is communicated with the outside; four limit grooves are uniformly formed in the circumferential direction on the inner circular surface at the end, communicated with the outside, of the driving shell; the side surfaces of the four limiting grooves are provided with an annular trigger groove; the annular trigger groove is communicated with the outside; an annular groove is formed in one side, close to the limiting groove, of the annular trigger groove; a circular guide groove is formed in the side face of one end, which is not provided with the annular groove, in the driving shell; four guide grooves are uniformly formed in the circumferential direction on the outer circular surface of one end, provided with the annular groove, of the driving shell; the inner circular surface of one end of the driving shell, which is communicated with the outside, is arranged on the outer circular surface of the driving circular ring; the four limit trigger blocks are respectively matched with the four limit grooves, the annular groove and the annular trigger groove; one ends of the four guide rods are uniformly arranged on the outer circular surface of the end, which is not provided with the annular groove, of the driving shell in the circumferential direction; acute included angles are formed between the four guide rods and the axis of the driving shell; the sliding block is provided with a square hole; two guide square grooves are symmetrically formed in the sliding block on two sides of the square hole; the four sliding blocks are respectively arranged on the four guide rods through square holes; one side of the sliding arc block is provided with a guide block; the four sliding arc blocks are respectively arranged on the outer circular surface of the driving shell through the matching of the guide blocks and the four guide grooves on the outer circular surface of the driving shell; a return spring is respectively arranged between each of the four sliding arc blocks and the corresponding four guide grooves; the eight driving rods are arranged on the four sliding arc blocks in pairs in a group respectively, and two driving rods in each group of driving rods respectively penetrate through the two guide square grooves on the corresponding sliding blocks; one end of each of the four connecting plates is respectively arranged on the four arc-shaped sliding blocks; the driving plate is arranged on the input shaft; the driving plate is connected with the other ends of the four connecting plates; a trapezoidal ring is arranged on one side of the driving plate close to the driving ring and matched with a trapezoidal ring groove on the driving ring; a plurality of steel balls are arranged between the inner circular surface of the driving shell and the outer circular surface of the transmission shaft; steel balls between the driving shell and the transmission shaft are matched with the two driving blades; the output shaft is arranged on the end face of the side, which is not communicated with the outside, of the driving shell;
the limiting trigger block is provided with a U-shaped groove; the U-shaped groove on the limiting trigger block is respectively matched with the four limiting grooves, the annular groove and the annular trigger groove;
in an initial state, one ends of the four limiting trigger blocks are respectively positioned in the four limiting grooves.
2. A torque limiter for use with an electric construction drill apparatus according to claim 1, wherein: when the U-shaped grooves on the four limiting trigger blocks are just moved to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, the driving shell cannot generate motion interference with the driving ring when the driving shell rotates under the friction action of the steel balls between the driving shell and the transmission shaft.
3. A torque limiter for use with an electric construction drill apparatus according to claim 1, wherein: the U-shaped grooves on the four limiting trigger blocks are moved to be completely matched with the limiting grooves on the driving shell under the rotation of the input shaft, and the sliding blocks do not move under the action of the friction force of the corresponding guide rods and the elastic force of the return springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811352028.6A CN109158940B (en) | 2017-10-25 | 2017-10-25 | Torque limiter for electric drill equipment in constructional engineering |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711006483.6A CN107553190B (en) | 2017-10-25 | 2017-10-25 | A kind of torque limiter being used to build electric drilling device based on sliding block |
| CN201811352028.6A CN109158940B (en) | 2017-10-25 | 2017-10-25 | Torque limiter for electric drill equipment in constructional engineering |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711006483.6A Division CN107553190B (en) | 2017-10-25 | 2017-10-25 | A kind of torque limiter being used to build electric drilling device based on sliding block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109158940A CN109158940A (en) | 2019-01-08 |
| CN109158940B true CN109158940B (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811352028.6A Active CN109158940B (en) | 2017-10-25 | 2017-10-25 | Torque limiter for electric drill equipment in constructional engineering |
| CN201711006483.6A Active CN107553190B (en) | 2017-10-25 | 2017-10-25 | A kind of torque limiter being used to build electric drilling device based on sliding block |
| CN201811352029.0A Active CN109158941B (en) | 2017-10-25 | 2017-10-25 | Torque limiter for electric drill equipment for building |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711006483.6A Active CN107553190B (en) | 2017-10-25 | 2017-10-25 | A kind of torque limiter being used to build electric drilling device based on sliding block |
| CN201811352029.0A Active CN109158941B (en) | 2017-10-25 | 2017-10-25 | Torque limiter for electric drill equipment for building |
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| CN (3) | CN109158940B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109158941A (en) | 2019-01-08 |
| CN109158941B (en) | 2020-07-31 |
| CN107553190B (en) | 2018-12-28 |
| CN109158940A (en) | 2019-01-08 |
| CN107553190A (en) | 2018-01-09 |
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