Striking group structure of power wrench
By designing a closed strike group structure in the power wrench and using lubricating oil and curved grooves/curved strips to cooperate, the existing power wrench has solved the problems of poor lubrication effect and large wear, achieving a longer lubrication effect and longer service life.
Patent Information
- Application Number
- CN202420926702.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing power wrench has poor lubrication effect, resulting in large mechanical wear and short service life.
A closed blowing group structure is designed, using lubricating oil to fill the impact cylinder, and the limit movement of the impact ring is achieved through the cooperation of arc grooves and arc strips, reducing the number of accessories, increasing the installation convenience, and using rubber rings to prevent it. Wear between impact rings.
It improves the lubrication effect, extends the service life of the equipment, reduces mechanical wear and makes installation more convenient.
Smart Images
Figure CN222244573U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of power wrenches, in particular to a striking group structure of a power wrench. Background Art
[0002] Power wrenches include electric wrenches and pneumatic wrenches, etc., and are tools for tightening bolts. For example, the Chinese utility model patent application No. 201520111927.2, the patent name of which is a striking group of pneumatic tools, includes: a transmission shaft, a first impact ring, an impact cylinder, a first pin, and a second pin. The impact cylinder is sleeved on the impact section of the transmission shaft and the first impact ring, and the impact cylinder has two pin-accommodating grooves and two hollow parts for the two sides of the first impact ring to be exposed.
[0003] Another example is the Chinese utility model patent number 201520111927.2, and the patent name is a plastic wind wrench with a forward and reverse adjustable knob. The striking group includes a transmission shaft, a striking block and a striking chamber that are matched and connected in sequence. Pins are provided at the upper and lower ends of the striking chamber, and the impact tube has two hollow parts for the two sides of the first impact ring to be exposed.
[0004] The impact tube of the striking group has two hollow parts for exposing both sides of the first impact ring. Butter is added to the first impact ring and the transmission shaft in the impact tube to play a lubricating role. However, the butter is easily thrown out from the hollow parts during the rotation of the impact tube, resulting in reduced lubrication effect of the first impact ring and the transmission shaft, large wear and large mechanical loss. Utility Model Content
[0005] The purpose of the utility model is to address the deficiencies of the prior art, at least to a certain extent, solve the technical problems in the related technology, and provide a solution to the problems of poor lubrication effect and large mechanical wear of the existing power wrench.
[0006] The power wrench striking group structure includes a transmission shaft, two impact rings, and an impact cylinder with one end closed and provided with a spline and the other end having an opening. The peripheral side of the impact cylinder is closed, and the two impact rings are movably and oppositely arranged on the inner wall of the impact cylinder. A cover plate is arranged at the opening of the impact cylinder, and a through hole is arranged on the cover plate. The transmission shaft extends out of the cover plate, and the cover plate and the impact cylinder are sealed by a sealing ring. The through hole on the cover plate and the transmission shaft are sealed by a sealing ring, and the impact cylinder is filled with lubricating oil.
[0007] Furthermore, a positioning groove is provided at the bottom of the impact cylinder, the end of the transmission shaft is adapted to the positioning groove, and there is a gap between the outer wall of the end of the transmission shaft and the groove wall of the positioning groove.
[0008] Furthermore, the inner wall of the impact cylinder is provided with two raised planes opposite to each other, and a strip-shaped arc groove is provided on the raised planes. The impact ring is provided with an arc strip adapted to the arc groove, and the arc strip is limited in the arc groove. When working, the impact ring moves back and forth on the inner wall of the impact cylinder through the movable cooperation between the arc strip and the arc groove.
[0009] Furthermore, the two raised planes form steps relative to the inner wall of the impact cylinder, and the cover plate is limited on the steps.
[0010] Furthermore, a rubber ring is provided between the two impact rings.
[0011] The technical effects of the utility model are mainly reflected in the following aspects: the utility model assembles the above-mentioned mechanical structure into a closed striking group structure and fills it with lubricating oil, so that the lubrication effect is better and more lasting, the degree of mechanical wear is greater, and the service life of the equipment is longer.
[0012] A positioning groove is provided at the bottom of the impact cylinder, and the end of the transmission shaft is adapted to the positioning groove. There is a gap between the outer wall of the end of the transmission shaft and the groove wall of the positioning groove. Because the inside is filled with lubricating oil, there is an oil film in the gap, which reduces the wear between the transmission shaft and the groove wall of the positioning groove.
[0013] The impact ring moves back and forth on the inner wall of the impact cylinder through the movable cooperation between the arc strip and the arc groove. During the back and forth movement, the impact ring limits the back and forth movement through the inner wall of the impact cylinder. The arc strip is equivalent to the first pin and the second pin in the prior art. Therefore, the utility model has fewer accessories and is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a side view schematic diagram of the utility model.
[0015] Figure 2 for Figure 1 Explosion diagram.
[0016] Figure 3 It is a schematic diagram of the structure of the transmission shaft.
[0017] Figure 4 It is a schematic diagram of the structure of the striking tube.
[0018] Figure 5 Schematic diagram of the structure of the striking ring.
[0019] Figure 6 A schematic diagram of the structure of the cover plate.
[0020] Figure 7 Installation position diagram of the striking ring and the transmission shaft
[0021] Figure 8 It is a schematic diagram of the structure in which the striking ring is installed on the striking tube. DETAILED DESCRIPTION
[0022] The embodiments of the present invention are described in detail below, which are intended to explain the present invention so as to make the technical solution of the present invention easier to understand and grasp, but should not be construed as limiting the present invention.
[0023] The striking principle of the striking group of the utility model is the same as that of the prior art. When working, the impact cylinder 32 is fixed on the power shaft, and the impact cylinder 32 rotates continuously. The upper impact ring 2 strikes the second striking part 12 and then avoids. When the impact cylinder 32 rotates to the opposite side, the lower impact ring 2 strikes the first striking part 11 and then avoids, and this reciprocating process is repeated until the fastening screws are loosened.
[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , and 7, Figure 8 As shown: the power wrench striking group structure includes a transmission shaft 1 and two striking rings 2. The transmission shaft 1 is provided with a first striking part 11 and a second striking part 12. The two striking rings 2 are respectively located outside the first striking part 11 and the second striking part 12, and include an impact cylinder 32 with a closed end and a spline 31 and an opening at the other end. The spline 31 is used to be fixedly connected to the power output shaft so that the impact cylinder 32 does not rotate. The impact cylinder 32 rotates with the two striking rings 2 to move. The two striking rings 2 strike the first striking part 11 and the second striking part 12 in turn. The peripheral side of the impact cylinder 32 is closed. The two striking rings 2 are movable and face oppositely. is arranged on the inner wall of the impact cylinder 32. After the impact ring 2 hits the first striking part 11 or the second striking part 12, it avoids it, so the impact ring 2 rotates inside the impact cylinder 32 through the arc strip 21 and the arc groove 33. A cover plate 4 is arranged at the opening of the impact cylinder 32. The cover plate 4 can be fixed by the outer shell of the power wrench, and can also be fixed to the impact cylinder 32 by screws. A through hole is arranged on the cover plate 4, and the transmission shaft 1 extends out of the cover plate 4 through the through hole. The cover plate 4 and the impact cylinder 32 are sealed by a sealing ring, and the through hole on the cover plate 4 and the transmission shaft 1 are sealed by a sealing ring. The impact cylinder 32 is filled with lubricating oil.
[0025] One sealing ring is arranged on the outer peripheral wall of the cover plate 4, and the other sealing ring is arranged on the outer periphery of the transmission shaft.
[0026] During the working process, the two existing impact rings 2 directly collide with the first striking part 11 and the second striking part 12. The existing impact ring 2 has a mechanical collision with the wall of the impact cylinder 32 through the rotation of the pin and is lubricated by butter, which is easy to be thrown out. Therefore, the utility model assembles the above-mentioned mechanical structure into a closed striking group structure and fills it with lubricating oil to make the lubrication effect better and more lasting, the mechanical wear degree is greater, and the service life of the equipment is longer.
[0027] A positioning groove 321 is provided at the bottom of the impact cylinder 32, and the end of the transmission shaft 1 is adapted to the positioning groove 321. There is a gap between the outer wall of the end of the transmission shaft 1 and the groove wall of the positioning groove 321. Because the inside is filled with lubricating oil, an oil film is generated in the gap, which reduces the wear between the transmission shaft 1 and the groove wall of the positioning groove 321.
[0028] The inner wall of the impact cylinder 32 is provided with two raised planes 322 opposite to each other, and a strip-shaped arc groove 33 is provided on the raised plane 322. The impact ring 2 is provided with an arc strip 21 adapted to the arc groove 33, and the arc strip 21 is limited in the arc groove 33. When working, the impact ring 2 moves back and forth on the inner wall of the impact cylinder 32 through the movable cooperation between the arc strip 21 and the arc groove 33. During the back and forth movement of the impact ring 2, the back and forth movement is limited by the inner wall of the impact cylinder 32. The arc strip 21 is equivalent to the first pin and the second pin in the prior art. Therefore, the utility model has fewer accessories and is more convenient to install.
[0029] The two raised planes 322 form a step 323 relative to the inner wall of the impact tube 32 , and the cover plate 4 is limited on the step 323 , and the cover plate 4 is sunk into the opening of the impact tube 32 .
[0030] In order to prevent mechanical wear between the two impact rings 2 , a rubber ring 5 is provided between the two impact rings 2 .
[0031] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.
Claims
1. The power wrench striking group structure includes a transmission shaft and two impact rings, and is characterized by: It comprises an impact cylinder with one end closed and the other end having an opening, the peripheral side of the impact cylinder is closed, two impact rings are movably and oppositely arranged on the inner wall of the impact cylinder, a cover plate is arranged at the opening of the impact cylinder, a through hole is arranged on the cover plate, the transmission shaft passes through the through hole and extends out of the cover plate, the cover plate and the impact cylinder are sealed by a sealing ring, the through hole on the cover plate and the transmission shaft are sealed by a sealing ring, and the impact cylinder is filled with lubricating oil; A positioning groove is provided at the bottom of the impact cylinder, the end of the transmission shaft is adapted to the positioning groove, and there is a gap between the outer wall of the end of the transmission shaft and the groove wall of the positioning groove; The inner wall of the impact cylinder is provided with two raised planes opposite to each other, and a strip-shaped arc groove is provided on the raised planes. The impact ring is provided with an arc strip adapted to the arc groove, and the arc strip is limited in the arc groove. When working, the impact ring moves back and forth on the inner wall of the impact cylinder through the active cooperation between the arc strip and the arc groove.
2. The power wrench striking group structure according to claim 1, characterized in that: The two raised planes form steps relative to the inner wall of the impact cylinder, and the cover plate is limited on the steps.
3. The power wrench striking group structure according to claim 1, characterized in that: A rubber ring is arranged between the two impact rings.