Single-phase variable frequency driving impact type electric wrench
By introducing a cushioning box and cushioning liquid into the impact electric wrench, the shock absorbing impact force is swung in the liquid, which solves the damage problem of impact on the equipment and achieves higher stability and service life.
Patent Information
- Application Number
- CN202510441371.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2025-06-13
AI Technical Summary
The existing impact electric wrench will cause a large impact on the equipment during the impact and rotation of the bolts or nuts, which may easily lead to equipment damage.
A single-phase frequency-change-driven impact electric wrench is designed, using a combination of a cushioning box and a cushioning liquid. The cushioning plate swings in the cushioning liquid, absorbs and disperses the impact force, and further disperses the impact energy through the cushioning liquid flow in the circulating tube.
It effectively reduces damage to the equipment during the impact process, improves the stability and reliability of the equipment, and improves the service life of the equipment through heat dissipation effect.
Smart Images
Figure CN120134255A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of threaded assembly tools, and in particular to an impact electric wrench driven by single-phase frequency conversion. Background Art
[0002] An impact electric wrench driven by single-phase frequency conversion is a new type of electric tool that combines frequency conversion control technology and an impact mechanism. Its core lies in achieving high-efficiency drive and precise torque control through a single-phase power supply. It mainly includes: a power unit that uses an asynchronous motor as the core power source, and its stator and rotor structures are specially designed to meet the requirements of frequency conversion control. The motor converts high speed into high torque output through a gear reduction box. An impact mechanism that includes an active impact block, a passive impact block, and a return spring. The active impact block realizes meshing and disengagement with the passive impact block through a spiral groove and a ball mechanism, forming an intermittent impact torque. A frequency conversion control system composed of a rectification module, a filter capacitor, an inverter, and a control chip that converts single-phase alternating current into three-phase variable-frequency alternating current to drive the motor.
[0003] The working process of the impact mechanism in the related art is as follows: In the initial meshing stage, the motor drives the active impact block to rotate through a reduction mechanism. Under the pressure of the return spring, the meshing teeth of the active and passive impact blocks bite, driving the working shaft to rotate. In the load increasing stage, when the resistance torque of the working shaft reaches the set threshold, the active impact block moves backward along the spiral groove, compressing the spring and disengaging from the passive impact block. In the impact release stage, the active impact block rebounds at high speed under the action of the spring return force, hitting the passive impact block again, generating an instantaneous high-torque shock wave.
[0004] The above-mentioned related art has the following defects: Each impact and the process of turning the bolt or nut will cause a large impact on the wrench, easily causing equipment damage, so it needs to be improved. Summary of the Invention
[0005] In order to reduce the damage to the equipment during the impact process, this application provides an impact electric wrench driven by single-phase frequency conversion.
[0006] The impact electric wrench driven by single-phase frequency conversion provided by this application adopts the following technical solutions: An impact electric wrench driven by single-phase frequency conversion includes a working head, an impact module, and a handle connected in sequence. The impact module is connected with a shock-absorbing box. The shock-absorbing box has shock-absorbing liquid inside. A shock-absorbing plate is rotatably connected inside the shock-absorbing box. The shock-absorbing plate is located in the shock-absorbing liquid. The shock-absorbing box is connected with a circulation pipe.
[0007] By adopting the above technical solution, the shock-absorbing liquid provided inside the shock-absorbing box and the shock-absorbing plate rotatably connected therein can effectively absorb the impact energy caused by the impact module to the overall device. During the impact process, the shock-absorbing plate swings in the shock-absorbing liquid, and part of the impact force is removed by using the liquid resistance, thereby reducing the overall amplitude of the wrench and reducing the damage caused by the impact to the device. In addition, the swing of the shock-absorbing plate can also push the shock-absorbing liquid to flow in the circulation pipe, further dispersing the impact energy and enhancing the shock-absorbing effect.
[0008] Preferably, a cooling channel is provided inside the impact module, and the cooling channel is connected in series with the circulation pipe.
[0009] By adopting the above technical solution, the setting of the cooling channel can form a series liquid circulation path with the circulation pipe. During the working process of the impact electric wrench, the shock-absorbing liquid in the circulation pipe will flow through the cooling channel when flowing, thereby effectively taking away the heat generated inside the impact module and achieving the heat dissipation and cooling effect on the impact module. This design not only improves the heat dissipation efficiency of the device but also ensures the stability and reliability of the impact module under long-term high-load operation.
[0010] Preferably, a liquid pushing bladder is also connected in series to the circulation pipe. Check valves are provided at both ends of the liquid pushing bladder where it communicates with the circulation pipe, and a reset elastic member is provided inside the liquid pushing bladder.
[0011] By adopting the above technical solution, the setting of the liquid pushing bladder can manually assist the one-way flow of the shock-absorbing liquid in the circulation pipe. The specific effects include: First, by squeezing the liquid pushing bladder, overcoming the external thrust of the reset elastic member and using the function of the check valve, the one-way flow of the shock-absorbing liquid is realized; Second, after releasing the liquid pushing bladder, the reset elastic member restores its deformation and pushes the liquid pushing bladder outward, thereby sucking the shock-absorbing liquid in the one-sided circulation pipe into the inside of the liquid pushing bladder. Repeating this operation can effectively promote the flow of the shock-absorbing liquid, enhance the heat dissipation effect and improve the shock-absorbing performance. Considering the pressure change during the flow when realizing the assistance for the circulation of the shock-absorbing liquid, components such as the liquid pushing bladder and the circulation pipe can be made of materials with a certain elasticity. During the operation, when the local pressure of the shock-absorbing liquid increases, components such as the circulation pipe can be appropriately expanded for temporary accommodation, and when the pressure of the shock-absorbing liquid returns, components such as the circulation pipe can also restore their deformation by themselves.
[0012] Preferably, the number of the shock-absorbing plates is more than two, and several shock-absorbing plates enclose a funnel shape, and a closed elastic member is sleeved on the outside of the tip.
[0013] By adopting the above technical solution, multiple shock-absorbing plates enclose a bucket-shaped structure, and a closed elastic member is arranged outside the tip, enabling the shock-absorbing plates to form an effect similar to unidirectional flow during the reciprocating impact. Taking the orientation of the tip of the bucket-shaped structure as the outside and the back as the inside, during the reciprocating impact, when the shock-absorbing liquid inside has an outward tendency, its potential energy can overcome the closed elastic member to push the shock-absorbing plate to flip, thus allowing the shock-absorbing liquid to flow into the outside from the gap; while when the shock-absorbing liquid outside has an inward tendency, it can only further press against several shock-absorbing plates, effectively restricting the reverse flow. This design ensures that a stable unidirectional flow direction of the shock-absorbing liquid is formed during the continuous reciprocating impact, thereby improving the heat exchange stability and further enhancing the shock-absorbing effect of the device. Corresponding to the design of the number and structure of the shock-absorbing plates, without adding additional power, the impact energy can be fully utilized to achieve a more efficient synergy of shock absorption and heat dissipation.
[0014] Preferably, the shock-absorbing plate includes a connected plate body and a flexible closing part. The plate body is rotatably connected to the shock-absorbing box. Several adjusting grooves are arranged outside the closing part, and the closed elastic member is in a ring structure and sleeved at the corresponding adjusting grooves.
[0015] By adopting the above technical solution, the shock-absorbing plate is composed of a plate body and a flexible closing part. The plate body can rotate relative to the shock-absorbing box, and the closed elastic member can adjust the inclination angle of the shock-absorbing plate according to the adjusting grooves sleeved at different positions. This structural design enables the shock-absorbing liquid to adjust the liquid volume ratio between the inside and the outside of the shock-absorbing plate as needed during the reciprocating flow process, thereby optimizing the shock-absorbing effect. At the same time, the flexible closing part cooperates with the ring-shaped closed elastic member to enable the shock-absorbing plate to flip or press tightly during the impact process, forming a unidirectional flow restriction, further enhancing the shock-absorbing performance and heat exchange stability.
[0016] Preferably, the closed elastic member has a limiting rod, and the closing part has a limiting hole for the limiting rod to pass through.
[0017] By adopting the above technical solution, the limiting rod of the closed elastic member passes through the limiting hole of the closing part. Even when the closing part is in an open state, the closed elastic member can still maintain position stability under the restriction of the limiting hole on the limiting rod, preventing the closed elastic member from moving or falling off during the continuous opening and closing process. Thus, the cooperation between the limiting rod of the closed elastic member and the limiting hole of the closing part further ensures the stability of the closed elastic member during the opening and closing process of the shock-absorbing plate, avoiding affecting the shock-absorbing effect due to position deviation or falling off.
[0018] Preferably, the shock-absorbing box is connected with a swing amplitude adjusting rod. The impact module has an adjusting hole. The swing amplitude adjusting rod is slidably connected to the adjusting hole and is provided with a swing amplitude locking member.
[0019] By adopting the above technical solution, the sliding connection structure between the swing amplitude adjusting rod and the adjusting hole can adjust the swing amplitude range of the shock absorption box according to actual needs. Specifically, within an appropriate range, when the length of the swing amplitude adjusting rod extending out of the adjusting hole increases, the maximum swing amplitude of the shock absorption box increases accordingly. This not only helps to more effectively buffer the vibration during the impact process, but also improves the circulation degree of the shock absorption liquid on the inner and outer sides of the shock absorption plate, thereby optimizing the overall shock absorption effect and heat dissipation performance. In addition, the setting of the swing amplitude locking member can ensure that the adjusted swing amplitude range remains stable, avoiding changes in the swing amplitude due to external factors during operation, and thus ensuring the reliability of the equipment operation.
[0020] Preferably, both ends of the swing amplitude adjusting rod are respectively rotationally connected to the shock absorption box and the impact module and are provided with angle locking members. The middle part of the swing amplitude adjusting rod has a toughness adjusting gap, and a pair of parallel toughness adjusting plates are arranged at the toughness adjusting gap.
[0021] By adopting the above technical solution, both ends of the swing amplitude adjusting rod are respectively rotationally connected to the shock absorption box and the impact module, and angle locking members are provided, so that the angle of the swing amplitude adjusting rod can be adjusted according to actual needs and locked, thereby adjusting the swing amplitude and direction of the shock absorption box. A pair of parallel toughness adjusting plates arranged at the toughness adjusting gap can selectively deform according to different angles during the reciprocating impact process. When the toughness adjusting plates are parallel to the axial direction of the working head, they are not easily deformed, providing more stable support; when perpendicular to the axial direction, they are more likely to swing, enhancing the shock absorption effect. This design effectively improves the adaptability and shock absorption performance of the equipment under different working conditions and reduces the damage caused by the impact to the equipment.
[0022] Preferably, the middle part of the swing amplitude adjusting rod has a toughness adjusting gap, and a pair of toughness adjusting plates are rotationally arranged at the toughness adjusting gap. An angle adjusting component is arranged between the two toughness adjusting plates.
[0023] By adopting the above technical solution, when the toughness adjusting plates are parallel to the axial direction of the working head, the toughness adjusting plates are not easily deformed during the reciprocating impact process, thereby reducing unnecessary energy loss; when the toughness adjusting plates are perpendicular to the axial direction of the working head, the toughness adjusting plates are more likely to swing during the reciprocating impact process, thereby increasing the swing amplitude adjustment range and shock absorption effect of the shock absorption box. In addition, the setting of the angle adjusting component makes the angle adjustment between the two toughness adjusting plates more accurate. This symmetric angle adjustment method is not easily subject to vibration offset perpendicular to the axial direction of the working head, improving the stability and adaptability of the overall structure.
[0024] Preferably, the angle adjusting component includes an angle adjusting sleeve and two angle adjusting rods. Both angle adjusting rods are threadedly connected to the angle adjusting sleeve and the ends extend out of the angle adjusting sleeve. The ends of the two angle adjusting rods extending out of the angle adjusting sleeve are respectively rotationally connected to the corresponding toughness adjusting plates.
[0025] By adopting the above technical solution, the angle adjustment component can achieve precise adjustment of the angle between the resilient adjustment plates. Rotating the angle adjustment sleeve can conveniently adjust the extension degree of the two angle adjustment rods relative to the angle adjustment sleeve, thereby changing the angle between the two resilient adjustment plates. When the angle between the two resilient adjustment plates increases (in the extreme state, the two resilient adjustment plates are at 180 degrees), the resilient adjustment plates are more likely to swing during the reciprocating impact, enabling the swing amplitude of the shock absorption box to be at the required level. This symmetric angle adjustment method is not prone to vibration deviation perpendicular to the axial direction of the working head.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By connecting the impact module to the shock absorption box and using the shock absorption plate in the shock absorption box to swing in the shock absorption liquid, the impact force can be effectively absorbed and dispersed, significantly reducing the damage to the equipment during the impact process; 2. The swing of the shock absorption plate drives the shock absorption liquid to flow in the circulation pipe, which not only realizes further dissipation of energy but also effectively reduces the working temperature of the impact module through cooperation with the cooling channel, improving the operation stability of the equipment; 3. By setting the swing amplitude adjustment rod and the resilient adjustment plate, the swing amplitude and resilient characteristics of the shock absorption box can be flexibly adjusted according to the actual working conditions, further optimizing the shock absorption effect and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present application; Figure 2 It is a schematic structural diagram of Embodiment 1 of the present application for showing the connection relationship between the closing elastic member and the shock absorption plate; Figure 3 It is Figure 2 A cross-sectional view along the A-A direction, showing the connection relationship between the limiting rod and the closing part; Figure 4 It is a schematic structural diagram of Embodiment 1 of the present application for showing the connection relationship between the swing amplitude adjustment rod and the shock absorption box and the impact module; Figure 5 It is Figure 4 A cross-sectional view along the B-B direction, showing the positional relationship between the resilient adjustment plate and the swing amplitude adjustment rod; Figure 6 It is a schematic structural diagram of Embodiment 2 of the present application for showing the positional relationship between the resilient adjustment plate and the swing amplitude adjustment rod; Figure 7 It is a schematic structural diagram of Embodiment 2 of the present application for showing the connection relationship between the resilient adjustment plate and the angle adjustment component.
[0028] In the figure: 1. Working head; 11. Impact module; 12. Handle; 2. Shock-absorbing box; 21. Shock-absorbing plate; 211. Plate body; 212. Closing part; 22. Circulation pipe; 23. Closing elastic part; 24. Adjusting groove; 25. Limit rod; 26. Limit hole; 3. Liquid-pushing bladder; 31. Check valve; 32. Reset elastic part; 4. Swing amplitude adjusting rod; 41. Swing amplitude locking part; 42. Adjusting hole; 43. Angle locking part; 44. Toughness adjusting plate; 5. Angle adjusting assembly; 51. Angle adjusting sleeve; 52. Angle adjusting rod. Detailed implementation mode
[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention.
[0030] The inventor of the present application found that during each impact and rotation of a bolt or nut by an impact electric wrench driven by single-phase frequency conversion, a relatively large impact will be caused to the wrench, which is likely to cause equipment damage. Therefore, the present application mainly adopts an impact electric wrench driven by single-phase frequency conversion, which includes a working head, an impact module and a handle. The impact module is connected with a shock-absorbing box, and the shock-absorbing liquid is provided inside the shock-absorbing box. A shock-absorbing plate is rotatably connected inside the shock-absorbing box, and the shock-absorbing box is connected with a circulation pipe. The impact force is unloaded through the shock-absorbing plate and the shock-absorbing liquid, thereby achieving the effect of reducing the damage to the equipment during the impact process. The following is a further detailed description of the present application.
[0031] Embodiment 1 Refer to Figure 1, the impact electric wrench with single-phase variable-frequency drive provided by the embodiment of the present application includes a working head 1, an impact module 11, and a handle 12 that are connected in sequence. The working head 1 is installed in front of the impact module 11, and the handle 12 is installed at the bottom of the impact module 11. A shock-absorbing box 2 is also connected to the top of the impact module 11. The inside of the shock-absorbing box 2 has shock-absorbing liquid, and a pair of shock-absorbing plates 21 are rotatably connected inside the shock-absorbing box 2. The two shock-absorbing plates 21 are located in the shock-absorbing liquid and enclose a funnel shape. Circulation pipes 22 are also connected to both ends of the shock-absorbing box 2. A cooling channel is provided inside the impact module 11. The cooling channel can be set in a state of being spirally wound, and the cooling channel is connected in series with the circulation pipes 22. When the impact module 11 impacts the whole during the working state of the wrench, it will mainly drive the whole wrench to reciprocate axially along the working head 1. During this process, the shock-absorbing plates 21 will swing against the resistance of the shock-absorbing liquid, and the force is relieved through the shock-absorbing plates 21, so that the amplitude of the whole wrench after being impacted can be reduced, and further the damage to the equipment during the impact process can be reduced. In addition, during the reciprocating swing of the shock-absorbing plates 21, the shock-absorbing liquid can be pushed to flow in the circulation pipes 22, and the force can also be relieved to the flow resistance of the shock-absorbing liquid during the rotation of the shock-absorbing plates 21. And the circulating liquid inside the circulation pipes 22 can flow through the cooling channel during the flowing process, so as to perform heat exchange inside the impact module 11, and further realize heat dissipation and temperature reduction.
[0032] Specifically, the shock-absorbing liquid can be a liquid with appropriate viscosity such as mineral oil or silicone oil. These liquids can provide a certain resistance when being impacted, so as to absorb part of the impact energy. In this embodiment, the shock-absorbing liquid is silicone oil with a viscosity of 50-100 cSt. The shock-absorbing plates 21 are made of metal materials, such as aluminum alloy or stainless steel. Their shapes are adapted to the internal shape of the shock-absorbing box 2, and the edges are polished to reduce the friction with the shock-absorbing box 2. The shock-absorbing plates 21 are rotatably connected to the inner wall of the shock-absorbing box 2 through bearings. This connection method ensures that the shock-absorbing plates 21 can swing freely when being impacted.
[0033] In practical applications, when the impact module 11 impacts the whole, the shock-absorbing box 2 will drive the whole wrench to reciprocate axially along the working head 1. During this process, the shock-absorbing plates 21 swing against the resistance of the shock-absorbing liquid, and the force is relieved through the resistance during the swinging process, so as to reduce the amplitude of the whole wrench after being impacted. In addition, when the shock-absorbing plates 21 reciprocate and swing, they will also push the shock-absorbing liquid to flow in the circulation pipes 22, further converting the impact force into the liquid flow resistance and realizing the double force-relieving effect.
[0034] Refer to Figure 1, in order to further optimize the flow efficiency of the shock-absorbing liquid, a liquid-pushing bladder 3 is connected in series in the middle of the circulation pipe 22. Both the liquid-pushing bladder 3 and the circulation pipe 22 are made of flexible materials and have a certain degree of expansion / reset ability, such as rubber or silica gel. One-way valves 31 are provided at the connection points of both ends of the liquid-pushing bladder 3 and the circulation pipe 22, and the two one-way valves 31 are used to cooperate to achieve the one-way flow of the shock-absorbing liquid. A reset elastic member 32 is arranged inside the liquid-pushing bladder 3, such as a spring or an elastic diaphragm. In this embodiment, the reset elastic member 32 is a spring. During operation, the user can squeeze the liquid-pushing bladder 3 by overcoming the external thrust of the reset elastic member 32. Due to the presence of the one-way valves 31 on both sides, the one-way flow of the shock-absorbing liquid in the liquid-pushing bladder 3 can be achieved. After releasing the liquid-pushing bladder 3, the reset elastic member 32 restores its deformation and pushes the liquid-pushing bladder 3 outwards, thereby sucking the shock-absorbing liquid in the unilateral circulation pipe 22 into the interior of the liquid-pushing bladder 3. Repeatedly squeezing and releasing the liquid-pushing bladder 3 can promote the one-way flow of the shock-absorbing liquid.
[0035] Referring to Figure 2 , in this embodiment, the number of shock-absorbing plates 21 is set to be more than two and they are formed into a bucket-shaped structure. A closing elastic member 23 is sleeved outside the tip thereof. In this embodiment, the closing elastic member 23 is selected as a rubber ring. Taking the orientation of the tip of the bucket-shaped structure as the outside and the back as the inside, during the reciprocating impact, when the shock-absorbing liquid inside has a tendency to flow outwards, its potential energy will overcome the closing elastic member 23 and push the shock-absorbing plate 21 to flip, so as to flow into the outside from the gap of the shock-absorbing plate 21; when the shock-absorbing liquid outside has a tendency to flow inwards, it can only further press against several shock-absorbing plates 21, thereby realizing the restriction of approximately one-way flow. In this way, a one-way flow direction will be formed during the continuous reciprocating impact, and the stability of heat exchange can be achieved.
[0036] The specific structure of the shock-absorbing plate 21 includes a connected plate body 211 and a flexible closing part 212. The plate body 211 is rotatably connected to the shock-absorbing box 2. A plurality of adjustment grooves 24 are arranged on the outside of the closing part 212. The closing elastic member 23 is a ring-shaped structure and is sleeved at the corresponding adjustment grooves 24. By adjusting the position of the closing elastic member 23, the inclination angle of the shock-absorbing plate 21 can be changed, thereby affecting the degree of the shock-absorbing liquid inside flowing towards the outside. The shock-absorbing plates 21 in different inclined states have different guiding degrees for the shock-absorbing liquid inside, and the proportion of the shock-absorbing liquid inside and outside the shock-absorbing plate 21 in the initial state is also different.
[0037] Referring to Figure 2 and Figure 3 , in order to improve the stability of the closing elastic member 23, a limiting rod 25 is arranged on the closing elastic member 23, and a limiting hole 26 for the limiting rod 25 to pass through is arranged on the closing part 212. Even when the closing part 212 is in an open state, the closing elastic member 23 can still maintain its position stability under the limiting effect of the limiting hole 26 on the limiting rod 25, preventing the closing elastic member 23 from moving or falling off during the continuous opening and closing process.
[0038] Reference Figure 4 , a swing adjustment rod 4 is additionally provided between the shock-absorbing box 2 and the impact module 11, and the installation of the shock-absorbing box 2 is realized by swing adjustment and can be used to adjust the swing of the shock-absorbing box 2. The bottom of the swing adjustment rod 4 is connected to the impact module 11 by sliding, and is provided with a swing locking member 41. Specifically, the impact module 11 is provided with an adjustment hole 42, and the bottom of the swing adjustment rod 4 is adapted to be inserted into the adjustment hole 42 to achieve stable sliding. The specific structure of the swing locking member 41 in this embodiment is to achieve locking by tightening a bolt. Within a certain range, when the length of the swing adjustment rod 4 extending out of the adjustment hole 42 increases, the swing of the shock-absorbing box 2 can be increased accordingly. When the swing amplitude of the shock-absorbing box 2 increases during the impact process, on the one hand, it is more convenient to buffer the vibration during the impact process, and on the other hand, it can improve the circulation of the shock-absorbing fluid on the inner and outer sides of the shock-absorbing plate 21.
[0039] The two ends of the swing adjustment rod 4 are rotatably connected to the shock absorbing box 2 and the impact module 11 respectively, and are provided with an angle locking member 43. The specific method of the rotatable connection of the two ends of the swing adjustment rod 4 in this embodiment is that the end of the swing adjustment rod 4 is set to a cylindrical shape, and the adjustment hole 42 corresponding to the end is a round hole to meet the requirement of the swing adjustment rod 4 to be rotatable. The specific structure of the angle locking member 43 is a bolt tightening method, which is tightened to achieve locking after being rotated to the required angle. The swing adjustment rod 4 has a toughness adjustment gap in the middle, and a pair of parallel toughness adjustment plates 44 are fixedly provided at the gap.
[0040] Reference Figure 5 , the C direction in the figure is the reciprocating vibration direction during the impact process, which is also the axial direction of the working head 1. When the toughness adjustment plate 44 is parallel to the axial direction of the working head 1 (as shown by the solid line in the figure), the toughness adjustment plate 44 is not easy to deform during the reciprocating impact process. When the toughness adjustment plate 44 is perpendicular to the axial direction of the working head 1 (as shown by the dotted line in the figure), the toughness adjustment plate 44 is more likely to swing during the reciprocating impact process. Therefore, the angle of the toughness adjustment plate 44 can be adjusted as needed to make the swing amplitude of the shock absorbing box 2 at the desired level.
[0041] The implementation principle of this embodiment is: by introducing the shock-absorbing box 2 and its internal structure, the damage to the equipment caused by the impact process can be effectively reduced. The combined design of the shock-absorbing liquid and the shock-absorbing plate 21 not only realizes the effective unloading of the impact force, but also further enhances the heat dissipation performance through the flow of liquid. The introduction of the push liquid bag 3 improves the flow efficiency of the shock-absorbing liquid, while the bucket-shaped structure of the multiple shock-absorbing plates 21 realizes one-way flow restriction and ensures the stability of heat exchange. The addition of the swing amplitude adjustment rod 4 and its auxiliary structure allows users to flexibly adjust the shock-absorbing effect according to actual needs, thereby comprehensively improving the reliability and adaptability of the equipment.
[0042] This embodiment also provides an operation method for an impact electric wrench with single-phase variable-frequency drive, including the following steps: Align the working head 1 of the wrench with the bolt or nut to be assembled, ensuring that the working head 1 is aligned with the target component.
[0043] Start the impact module 11. During the impact process, the shock-absorbing plate 21 in the shock-absorbing box 2 swings against the resistance of the shock-absorbing liquid, and at the same time, it pushes the shock-absorbing liquid to flow in the circulation pipe 22, achieving the unloading and heat dissipation of the impact force.
[0044] Adjust the position of the swing amplitude adjusting rod 4 and the angle of the toughness adjusting plate 44 as needed to optimize the shock-absorbing effect.
[0045] The implementation principle of this embodiment is as follows: By reasonably planning the operation process and combining the coordinated work of the shock-absorbing system and the impact mechanism, an efficient and stable thread assembly process is achieved, significantly reducing the damage caused by the impact to the equipment.
[0046] Embodiment 2 Refer to Figure 6 and Figure 7 This embodiment is different from Embodiment 1 in that the end of the swing amplitude adjusting rod 4 is not rotatably connected to both the shock-absorbing box 2 and the impact module 11. Specifically, the top of the swing amplitude adjusting rod 4 is fixedly connected to the shock-absorbing box 2, and the bottom of the swing amplitude adjusting rod 4 is slidably connected to the impact module 11. The two toughness adjusting plates 44 are rotatably connected at the toughness adjusting gap, that is, the two toughness adjusting plates 44 are not always parallel.
[0047] An angle adjusting assembly 5 is provided between the toughness adjusting plates 44. This assembly includes an angle adjusting sleeve 51 and two angle adjusting rods 52. The two angle adjusting rods 52 are both threadedly connected to the angle adjusting sleeve 51 and their ends extend out of the angle adjusting sleeve 51. The extending ends are respectively rotatably connected to the corresponding toughness adjusting plates 44 in a ball-and-socket manner. By rotating the angle adjusting sleeve 51, the angle between the two toughness adjusting plates 44 can be conveniently adjusted, thereby achieving precise control of the swing amplitude of the shock-absorbing box 2. Compared with the case in Embodiment 1 where the two toughness adjusting plates 44 always remain parallel, this method has higher adjustment accuracy. Initially, the two toughness adjusting plates 44 are parallel to each other and the toughness adjusting plates 44 are parallel to the axis of the working head 1. In this state, the toughness adjusting plates 44 are not easily deformed during the reciprocating impact. When the angle between the two toughness adjusting plates 44 increases, the toughness adjusting plates 44 are gradually prone to swing during the reciprocating impact, thus facilitating the adjustment of toughness. In addition, this symmetric angle adjustment method is not easily prone to vibration offset in the direction perpendicular to the axis of the working head 1. In Embodiment 1, for example, when the toughness adjusting plate 44 rotates to 45 degrees with the vibration direction, the deformation of the toughness adjusting plate 44 after being impacted may have a swing offset in the direction perpendicular to the axis of the working head 1.
[0048] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A single-phase variable frequency driven impact electric wrench, comprising a working head (1), an impact module (11) and a handle (12) connected in sequence, characterized in that: The impact module (11) is connected to a shock absorbing box (2), the shock absorbing box (2) has a shock absorbing fluid inside, a shock absorbing plate (21) is rotatably connected inside the shock absorbing box (2), the shock absorbing plate (21) is located in the shock absorbing fluid, and the shock absorbing box (2) is connected to a circulation pipe (22).
2. The single-phase variable frequency driven electric impact wrench according to claim 1, characterized in that: A cooling channel is provided inside the impact module (11), and the cooling channel is connected in series with the circulation pipe (22).
3. The single-phase variable frequency driven electric impact wrench according to claim 2, characterized in that: The circulation tube (22) is also connected in series with a liquid pushing capsule (3), both ends of the liquid pushing capsule (3) are provided with check valves (31) at the connection points with the circulation tube (22), and a reset elastic member (32) is provided inside the liquid pushing capsule (3).
4. The single-phase variable frequency driven electric impact wrench according to claim 1, characterized in that: The number of the shock absorbing plates (21) is more than two, and the plurality of shock absorbing plates (21) are arranged in a bucket shape, and a closing elastic member (23) is sleeved on the outer side of the tip.
5. The single-phase variable frequency driven electric impact wrench according to claim 4, characterized in that: The shock absorbing plate (21) comprises a connected plate body (211) and a flexible closing portion (212); the plate body (211) is rotatably linked to the shock absorbing box (2); a plurality of adjustment grooves (24) are arranged on the outer side of the closing portion (212); and the closing elastic member (23) is an annular structure and is sleeved on the corresponding adjustment grooves (24).
6. The single-phase variable frequency driven electric impact wrench according to claim 5, characterized in that: The closing elastic member (23) has a limiting rod (25), and the closing portion (212) has a limiting hole (26) for the limiting rod (25) to pass through.
7. The single-phase variable frequency driven electric impact wrench according to claim 1, characterized in that: The shock absorbing box (2) is connected to a swing amplitude adjustment rod (4), the impact module (11) has an adjustment hole (42), the swing amplitude adjustment rod (4) is slidably connected to the adjustment hole (42) and is provided with a swing amplitude locking member (41).
8. The single-phase variable frequency driven electric impact wrench according to claim 7, characterized in that: The two ends of the swing amplitude adjustment rod (4) are respectively rotatably connected to the shock absorbing box (2) and the impact module (11) and are provided with angle locking parts (43); the middle part of the swing amplitude adjustment rod (4) has a toughness adjustment gap and a pair of parallel toughness adjustment plates (44) are provided at the toughness adjustment gap.
9. The single-phase variable frequency driven electric impact wrench according to claim 7, characterized in that: The swing amplitude adjustment rod (4) has a toughness adjustment gap in the middle, and a pair of toughness adjustment plates (44) are rotatably arranged at the toughness adjustment gap, and an angle adjustment component (5) is arranged between the two toughness adjustment plates (44).
10. The single-phase variable frequency driven electric impact wrench according to claim 9, characterized in that: The angle adjustment assembly (5) comprises an angle adjustment sleeve (51) and two angle adjustment rods (52), the two angle adjustment rods (52) are both threadedly connected to the angle adjustment sleeve (51) and their ends extend out of the angle adjustment sleeve (51), and the ends of the two angle adjustment rods (52) extending out of the angle adjustment sleeve (51) are respectively rotatably connected to corresponding toughness adjustment plates (44).