Vertical lithium battery wrench

Abstract

The utility model discloses a vertical lithium battery wrench which comprises a central connecting assembly, a driving motor, an impact output assembly fixed at the output end of the driving motor, a power battery pack for providing electric energy for the driving motor and a connecting rod, wherein one end of the connecting rod is fixed on the central connecting assembly, and the other end of the connecting rod is provided with a handle. A main shaft, a T-shaped output shaft connected to the main shaft, a plurality of driven wheels meshed with the output end of the driving motor and the gear sleeve, an impact block arranged on the main shaft in a sleeving mode and an elastic piece located between the impact block and the step face of the main shaft are arranged in the impact output assembly. The impact guide structure is composed of a V-shaped groove in the outer wall of the main shaft, a reverse V-shaped notch in the inner wall of the impact block and a guide ball contained in the reverse V-shaped notch. Through the vertical structural design and the unique impact guide mechanism, the operability of specific working conditions can be improved, and stable and efficient impact torque output is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electric tools, and specifically relates to a vertical lithium battery wrench. BACKGROUND

[0002] The electric wrench is an electric tool widely used in the fields of construction, mechanical installation and maintenance, and provides torque to tighten or loosen connecting pieces such as bolts and nuts by driving the output shaft to rotate through a motor. With the development of lithium battery technology, lithium battery wrenches gradually become the mainstream products of electric wrenches due to their high energy density, lightweight, no memory effect and other advantages.

[0003] The lithium battery wrenches on the market are mainly divided into two structural forms of pistol type and straight handle type. The pistol type lithium battery wrench meets the ergonomic requirements, but is limited in operation in some small spaces; the straight handle type lithium battery wrench is simple in structure, but is prone to wrist fatigue after long-time use. The existing vertical lithium battery wrenches on the market have the following problems:

[0004] Low driving efficiency: the traditional vertical lithium battery wrench usually adopts a single transmission path, and the power transmission efficiency of the driving motor is limited, so that the output performance of the motor cannot be fully utilized;

[0005] Poor impact precision: the guide mechanism of the existing impact structure is unreasonably designed, so that the impact block is prone to deviation during high-speed rotation, thereby reducing the impact precision and the stability of torque output;

[0006] Short service life: the contact parts in the impact assembly are severely worn, especially under high-frequency impact working conditions, the wear of the parts is aggravated, thereby shortening the service life of the tool as a whole;

[0007] Inconvenient operation: most vertical lithium battery wrenches lack humanized design, for example, the auxiliary holding structure is missing, and the user experience is poor during long-time or high-intensity operation, which is prone to cause fatigue of the operator.

[0008] Therefore, it is urgent to design a vertical lithium battery wrench which is more reasonable in structure, higher in transmission efficiency, longer in service life and more convenient in operation, so as to meet the increasing industrial application requirements. UTILITY MODEL CONTENTS

[0009] In view of the problems in the prior art, the utility model aims to provide a vertical lithium battery wrench, which improves the power transmission efficiency and impact precision through the optimized design of the impact output assembly, prolongs the service life of the tool, and improves the ergonomic design, the operation comfort and the convenience.

[0010] To achieve the above-mentioned purpose, the utility model provides a vertical lithium battery wrench, which comprises:

[0011] The utility model relates to a portable percussion tool, which comprises a central connecting assembly, a driving motor fixed to the central connecting assembly, an impact output assembly fixed to the output end of the driving motor, and a power battery pack connected to the central connecting assembly to provide electric energy for the driving motor.

[0012] A connecting rod is coaxial with the impact output assembly, one end of the connecting rod is fixed to the central connecting assembly, and the other end of the connecting rod is provided with a handle.

[0013] The impact output assembly comprises a shell, and the shell is provided with the following components:

[0014] A main shaft, one end of the main shaft is rotationally connected to the shell, and the other end of the main shaft is connected to a T-shaped output shaft; the output end of the T-shaped output shaft extends out of the shell.

[0015] A plurality of driven wheels, the plurality of driven wheels are uniformly distributed around the main shaft axis, and the output end of the driving motor is inserted into a space surrounded by the plurality of driven wheels and is engaged with at least one driven wheel.

[0016] A toothed sleeve, the inner wall of the toothed sleeve is provided with a toothed structure, and the outer wall of the toothed sleeve is clamped in the shell; the driven wheel is engaged with the inner wall of the toothed sleeve.

[0017] An impact block, the impact block is sleeved on the main shaft.

[0018] An elastic member, one end of the elastic member abuts against the end face of the impact block, and the other end of the elastic member abuts against the stepped face of the main shaft.

[0019] At least one set of impact guide structures, each set of impact guide structures comprises a V-shaped groove arranged on the outer wall of the main shaft and a V-shaped notch arranged on the inner wall of the impact block; the opening direction of the V-shaped groove is opposite to the opening direction of the V-shaped notch; and a guide bead is accommodated in the space surrounded by the V-shaped groove and the V-shaped notch.

[0020] In some optional embodiments of the utility model, the main shaft comprises a main shaft first section, a main shaft second section and a main shaft third section connected in sequence; the outer diameter of the main shaft second section is greater than the outer diameter of the main shaft third section.

[0021] The main shaft first section is rotationally connected to the shell; the main shaft second section is hollow, a plurality of driven wheels are accommodated in the hollow portion and are rotationally connected to the main shaft second section; the main shaft first section is provided with a hole for inserting the output end of the driving motor into the hollow portion; the V-shaped groove is arranged on the outer wall of the main shaft third section; and one end of the elastic member abuts against the end face of the main shaft second section. The segmented design helps to optimize the structural strength and functional division of the main shaft, facilitating machining and assembly.

[0022] Preferably, the main shaft further comprises a main shaft fourth section connected to the main shaft third section, the outer diameter of the main shaft fourth section is smaller than the outer diameter of the main shaft third section, and the main shaft fourth section is connected to the T-shaped output shaft through a spline. The spline connection mode can reliably transmit large torque and facilitates replacement and maintenance of the T-shaped output shaft.

[0023] Preferably, the main shaft five section is arranged between the main shaft two section and the main shaft three section, the outer diameter of the main shaft five section is greater than the outer diameter of the main shaft two section, and the elastic member is abutted against the end face of the main shaft five section.

[0024] In some optional embodiments of the utility model, the end face of the impact block is provided with an annular groove, and one end of the elastic member is abutted against the bottom of the annular groove. The annular groove can provide stable positioning for the elastic member, preventing the elastic member from deviating during compression and rebound.

[0025] Preferably, a ball is arranged between the elastic member and the bottom of the annular groove, and a ball retaining ring is arranged between the ball and the elastic member. By introducing the ball and the ball retaining ring, rolling contact can be formed between the elastic member and the impact block, significantly reducing the frictional resistance therebetween, especially when the impact block rotates relative to the main shaft, allowing the compression and rebound of the elastic member to be smoother, reducing energy loss, and prolonging the service life of the elastic member and the impact block.

[0026] In some optional embodiments of the utility model, two groups of symmetrical impact guide structures are arranged. The use of two groups of symmetrical impact guide structures can make the force on the impact block more balanced during movement, guide more stably and reliably, further reduce shaking and deviation, improve impact precision and efficiency, and also help to disperse stress and improve the durability of the structure.

[0027] In some optional embodiments of the utility model, the side wall of the central connecting assembly is provided with an auxiliary handle. The addition of the auxiliary handle can improve the stability and controllability of the operator's grip on the wrench, especially during large-torque operation or long-time work, effectively sharing the stress of the main handle, reducing the operating strength, and improving the safety.

[0028] The vertical lithium battery wrench has the following beneficial effects:

[0029] 1. By arranging a plurality of driven wheels distributed around the main shaft axis, the output end of the driving motor can be engaged with a plurality of driven wheels at the same time, realizing multi-path transmission and significantly improving the power transmission efficiency and torque output.

[0030] 2. The impact guide structure is matched with a unique V-shaped groove and a V-shaped notch, and is matched with a guide ball, so that the movement of the impact block is more stable and accurate, the radial deviation is reduced, and the impact precision and stability are improved.

[0031] 3. The main shaft is designed in multiple sections, and the diameters of the sections are reasonably configured, which not only meets the strength requirements of different parts, but also optimizes the spatial layout, making the overall structure more compact.

[0032] 4. The annular groove structure of the impact block end face design, cooperate with elastic element, ball and ball ring, form a return mechanism with buffering function, reduce the wear of impact block, prolong the service life of the tool;

[0033] 5. The auxiliary handle provided on the side wall of the central connecting assembly provides an additional gripping point, making the operation more stable and reducing fatigue, especially suitable for long-time or high-intensity working environment.

[0034] The vertical lithium battery wrench provided by the utility model solves the problems of low transmission efficiency, poor impact precision, short service life and inconvenient operation in the prior art through structural innovation and mechanism optimization, and greatly improves the product performance and user experience. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme of the disclosed embodiment, the drawings of the embodiment will be briefly introduced below, and these drawings are only for illustrative purposes, and are not intended to limit the protection scope of the utility model.

[0036] Figure 1 is a three-dimensional structure schematic of a vertical lithium battery wrench of the utility model Figure 1 ;

[0037] Figure 2 is a three-dimensional structure schematic of a vertical lithium battery wrench of the utility model Figure 2 ;

[0038] Figure 3 is a three-dimensional structure schematic of an impact output assembly in the utility model;

[0039] Figure 4 is a three-dimensional cross-sectional explosion schematic of an impact output assembly in the utility model;

[0040] Figure 5 is a cross-sectional schematic of an impact output assembly in the utility model;

[0041] Figure 6 is Figure 5 a cross-sectional schematic at A-A;

[0042] Figure 7 is a schematic diagram of a specific structure of a main shaft of the utility model. DETAILED DESCRIPTION

[0043] The technical solutions of the present application (including the preferred technical solution) will be further described in detail below by means of the accompanying drawings and some optional embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0044] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood broadly, and the specific meanings of the above words in the present application can be reasonably determined by those skilled in the art in combination with the specific content of the technical solutions.

[0045] It should be noted that in the description of the present application, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0046] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0047] Embodiment 1

[0048] With reference to Figures 1 to 7 The vertical lithium battery wrench 100 provided by the present application comprises a central connecting assembly 110, a driving motor 120, an impact output assembly 130, a power battery pack 140, a connecting rod 150 and a handle 160.

[0049] The central connecting assembly 110 serves as the core connecting component of the vertical lithium electric wrench 100, and plays a role in organically combining various components into a whole. The driving motor 120 is fixed on the central connecting assembly 110 as the power source of the entire wrench. The impact output assembly 130 is fixed on the output end of the driving motor 120, which is used to convert the rotary motion of the motor into impact rotary output, and then tighten or loosen the connecting pieces such as bolts. The power battery pack 140 is connected to the central connecting assembly 110 to provide power for the driving motor 120. High-energy-density lithium batteries are used to ensure sufficient endurance of the tool.

[0050] The connecting rod 150 is coaxially arranged with the impact output assembly 130, one end of which is fixed on the central connecting assembly 110, and the other end is provided with a handle 160. This design allows the operator to control the tool through the handle 160 to achieve precise operation control. The length of the connecting rod 150 can be adjusted according to actual application requirements to adapt to different working environments.

[0051] The impact output assembly 130 includes a housing 131, and the following components are arranged in the housing 131:

[0052] The main shaft 200 is rotatably connected to the casing assembly 1000 at one end and connected to the T-shaped output shaft 260 at the other end. The output end of the T-shaped output shaft 260 extends out of the housing 131 for mounting a sleeve or other working head. The main shaft 200 is a core component for transmitting power, and its structural design has a decisive influence on the performance of the entire tool.

[0053] A plurality of driven wheels 300 are uniformly distributed around the axis of the main shaft 200, and the output end of the driving motor 120 is inserted into the space surrounded by the plurality of driven wheels 300 and engaged with at least one driven wheel 300. This multi-point engagement design significantly improves the efficiency of power transmission, while reducing stress concentration at a single engagement point and prolonging the service life of the tool.

[0054] The inner wall of the tooth sleeve 400 is provided with a tooth-shaped structure 410, and the outer wall is clamped in the casing assembly 1000. The driven wheel 300 is engaged with the inner wall of the tooth sleeve 400 to form a planetary gear transmission mechanism, achieving efficient power transmission and speed conversion. This transmission structure not only has high transmission efficiency, but also can achieve a large transmission ratio to meet the demand for high torque output.

[0055] The impact block 500 is sleeved on the main shaft 200 and can move axially under the guidance of the main shaft 200. A special matching structure is provided between the impact block 500 and the main shaft 200, which can ensure the synchronization of the two in the rotation direction, and also allows the impact block 500 to make a limited displacement relative to the main shaft 200 in the axial direction.

[0056] One end of the elastic element 600 abuts against the end face of the impact block 500, and the other end abuts against the stepped surface of the main shaft 200. The elastic element 600 serves the functions of energy storage and return. During the impact, the elastic element 600 is compressed to store energy. After the impact is completed, the elastic element 600 releases energy, pushing the impact block 500 back to its initial position, ready for the next impact.

[0057] Each impact guide structure includes: a V-groove 700 on the outer wall of the main shaft 200, a V-notch 800 on the inner wall of the impact block 500, and a guide bead 900 housed in the space enclosed by the V-groove 700 and the V-notch 800. The opening direction of the V-groove 700 is opposite to that of the V-notch 800, forming a closed space. This design ensures precise guidance of the impact block 500 during high-speed movement, reduces radial offset, and improves impact accuracy.

[0058] In this embodiment, the spindle 200 adopts a segmented design, including a first spindle section 210, a second spindle section 220, and a third spindle section 230 connected in sequence. The outer diameter of the second spindle section 220 is larger than that of the third spindle section 230, forming a distinct stepped structure. The first spindle section 210 is rotatably connected to the housing assembly 1000 to ensure stable rotation of the spindle 200. The second spindle section 220 has a hollowed-out portion 221, in which multiple driven wheels 300 are housed and rotatably connected to the second spindle section 220. The first spindle section 210 has an insertion hole 222 for the output end of the drive motor 120 to be inserted into the hollowed-out portion 221. A V-groove 700 is arranged on the outer wall of the third spindle section 230, and one end of the elastic element 600 abuts against the end face of the second spindle section 220.

[0059] Example 2

[0060] like Figure 7 As shown, based on Embodiment 1, the spindle 200 in this embodiment further includes a fourth spindle section 240 connected to the third spindle section 230. The outer diameter of the fourth spindle section 240 is smaller than that of the third spindle section 230, forming another stepped structure. The fourth spindle section 240 is connected to the T-type output shaft 260 via a spline. This connection method ensures synchronization of the two in the rotational direction and has high connection strength, enabling it to withstand high torque transmission.

[0061] Furthermore, a fifth spindle section 250 is provided between the second spindle section 220 and the third spindle section 230. The outer diameter of the fifth spindle section 250 is larger than that of the second spindle section 220. The fifth spindle section 250 forms a protruding shoulder, and the elastic element 600 abuts against the end face of the fifth spindle section 250. This design increases the support area of ​​the elastic element 600, improves the stability of the elastic element 600 during operation, and optimizes stress distribution, reducing local stress concentration.

[0062] Example 3

[0063] As Figure 4 shown, on the basis of the foregoing embodiment, the impact block 500 of the present embodiment is provided with an annular groove 510 on the end face, and one end of the elastic member 600 abuts against the bottom of the annular groove 510. The annular groove 510 provides a stable mounting position for the elastic member 600, preventing the elastic member 600 from deviating during operation and ensuring that the elastic member 600 is always in the correct working position.

[0064] Further, a ball 610 is arranged between the elastic member 600 and the bottom of the annular groove 510, and a ball retaining ring 620 is arranged between the ball 610 and the elastic member 600. This design constitutes an elastic support structure with low friction characteristics. The ball 610 can roll on the bottom of the annular groove 510, reducing the friction between the elastic member 600 and the impact block 500, improving energy transmission efficiency, reducing wear and tear of parts, and prolonging the service life of the tool. The ball retaining ring 620 serves to limit the movement range of the ball 610, ensuring that the ball 610 is always in the correct working position.

[0065] Embodiment 4

[0066] On the basis of the foregoing embodiment, the present embodiment is provided with two sets of symmetrically arranged impact guide structures. The two sets of impact guide structures are symmetrically distributed at 180 degrees along the circumference of the main shaft 200. This symmetrical design ensures that the impact block 500 is uniformly stressed, reducing unbalanced factors during movement and further improving impact accuracy and stability. Each set of impact guide structure includes a V-shaped groove 700 arranged on the outer wall of the main shaft 200, a V-shaped notch 800 arranged on the inner wall of the impact block 500, and a guide ball 900 accommodated in the space enclosed by the two.

[0067] Embodiment 5

[0068] On the basis of the foregoing embodiment, the side wall of the central connecting assembly 110 of the present embodiment is provided with an auxiliary handle 111. The auxiliary handle 111 provides an additional gripping point for the operator, especially suitable for work scenarios that require precise control or the application of greater pressure. The setting of the auxiliary handle 111 conforms to the principle of ergonomics, allowing the operator to operate the tool for a long time in a more comfortable posture, reducing fatigue and improving work efficiency.

[0069] The auxiliary handle 111 can be designed to be adjustable, allowing the operator to adjust its position and angle according to personal habits and work needs, further improving the adaptability and human-machine friendliness of the tool.

[0070] The working principle of the vertical lithium battery wrench 100 provided by the utility model is as follows:

[0071] When the operator presses the start switch of the wrench, the power battery pack 140 supplies power to the driving motor 120, and the driving motor 120 starts to rotate. The output shaft of the driving motor 120 enters the hollow part 221 of the main shaft 200 through the insertion hole 222 and engages with the driven wheels 300. Since a plurality of driven wheels 300 are arranged, the driving motor 120 can simultaneously engage with a plurality of driven wheels 300, realize multi-path transmission, and improve power transmission efficiency.

[0072] The driven wheels 300 engage with the toothed structure 410 on the inner wall of the toothed sleeve 400. With the rotation of the driven wheels 300, the main shaft 200 also starts to rotate. The main shaft 200 drives the impact block 500 to rotate together through the guide bead 900 between the V-shaped groove 700 and the V-shaped notch 800.

[0073] During the impact process, the V-shaped groove 700 and the V-shaped notch 800 move relatively, the guide bead 900 moves along the inclined surface of the V-shaped groove 700 and the V-shaped notch 800, pushes the impact block 500 to move axially along the main shaft 200, and compresses the elastic member 600. When the guide bead 900 moves to the set position, the impact block 500 is suddenly released, quickly moves and generates an impact effect under the action of the elastic member 600, transmits the rotational kinetic energy to the T-shaped output shaft 260, thereby generating a high-torque output to tighten or loosen the bolt.

[0074] Then, under the action of the elastic member 600, the impact block 500 returns to the initial position, and a impact cycle is completed. This process is repeated to form a continuous impact effect, realizing efficient tightening or loosening operation.

[0075] The vertical lithium battery wrench 100 of the utility model realizes high-efficiency and high-precision torque output through the optimized transmission structure and impact mechanism design, considers the ergonomics factor, provides comfortable operation experience, and is particularly suitable for work scenes requiring large torque and long-time operation.

[0076] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, combination, replacement, improvement, etc. made within the spirit and principle of the utility model is included in the protection scope of the utility model.

Claims

1. A vertical lithium-ion battery wrench, characterized in that, include: Central connecting component; drive motor fixed to the central connecting component; impact output component fixed to the output end of the drive motor; A power battery pack connected to the central connection assembly to provide power to the drive motor; The connecting rod is coaxial with the impact output component, with one end fixed to the central connecting component and the other end provided with a handle; The impact output assembly includes a housing, and the housing contains: A main shaft, one end of which is rotatably connected to the housing, and the other end of which is connected to a T-shaped output shaft; the output end of the T-shaped output shaft extends out of the housing; Multiple driven wheels are evenly distributed around the main shaft axis, and the output end of the drive motor is inserted into the space enclosed by the multiple driven wheels and meshes with at least one driven wheel; The gear sleeve has a toothed structure on its inner wall and its outer wall is snapped into the housing; the driven wheel meshes with the inner wall of the gear sleeve. The impact block is fitted onto the spindle; The elastic element has one end abutting against the end face of the impact block and the other end abutting against the stepped surface of the main shaft; At least one set of impact guiding structures, each set of impact guiding structures including: a V-groove on the outer wall of the main shaft, and a V-notch on the inner wall of the impact block; the opening direction of the V-groove and the opening direction of the V-notch are opposite; and a guide bead accommodated in the space enclosed by the V-groove and the V-notch.

2. The vertical lithium battery wrench according to claim 1, characterized in that: The spindle comprises a first spindle section, a second spindle section, and a third spindle section connected in sequence; the outer diameter of the second spindle section is larger than the outer diameter of the third spindle section. The first section of the main shaft is rotatably connected to the housing; the second section of the main shaft is hollowed out, and multiple driven wheels are housed in the hollowed-out section and rotatably connected to the second section of the main shaft; the first section of the main shaft is provided with a hole for the output end of the drive motor to be inserted into the hollowed-out section; the V-groove is arranged on the outer wall of the third section of the main shaft; one end of the elastic element abuts against the end face of the second section of the main shaft.

3. The vertical lithium battery wrench according to claim 2, characterized in that: The spindle also includes a fourth spindle section connected to the third spindle section, the outer diameter of the fourth spindle section being smaller than the outer diameter of the third spindle section; the fourth spindle section is connected to a T-type output shaft via a spline.

4. The vertical lithium battery wrench according to claim 2, characterized in that: A fifth section of the main shaft is provided between the second and third sections, and the outer diameter of the fifth section of the main shaft is larger than the outer diameter of the second section of the main shaft; the elastic element abuts against the end face of the fifth section of the main shaft.

5. The vertical lithium battery wrench according to claim 1, characterized in that: The end face of the impact block is provided with an annular groove, and one end of the elastic element abuts against the bottom of the annular groove.

6. The vertical lithium battery wrench according to claim 5, characterized in that: A ball bearing is provided between the elastic element and the bottom of the annular groove, and a ball bearing retainer ring is provided between the ball bearing and the elastic element.

7. The vertical lithium battery wrench according to claim 1, characterized in that: It is equipped with two sets of symmetrically arranged impact guiding structures.

8. The vertical lithium battery wrench according to claim 1, characterized in that: The central connecting component is provided with an auxiliary handle on its side wall.

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