Open type steel bar wrench

Abstract

The utility model provides an open type steel bar wrench which comprises a driving motor, a transmission device and a plate assembly. The driving motor is used for providing power; the transmission device is connected with the driving motor; the plate assembly is arranged in front of the driving motor; the transmission device is arranged in the plate assembly, and an opening is formed in the front end of the plate assembly. The plate assembly comprises a cover plate and a bottom plate; an accommodating space is formed between the cover plate and the bottom plate; the transmission device is arranged in the accommodating space; the transmission device comprises a central gear shaft and a side gear, and the central gear shaft of the rotor is connected with a driving motor; the side gear is meshed with the central gear shaft; gear teeth are arranged on the side surface of the rotor; the gear teeth are meshed with the side gear; the plate assembly comprises the cover plate and the bottom plate and can be designed to be light and thin, so that the weight is light, and lifting is more labor-saving when a column rib is screwed; as the outer diameter of the opening rotating wheel is smaller, the head parts of the cover plate and the bottom plate are narrower, and the cover plate and the bottom plate can be used in places with dense steel bars, such as steel bar shear walls, cross beams, steel bar cages and other construction sites.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and particularly to an open-end rebar wrench. Background Technology

[0002] A rebar sleeve, also known as a rebar connector, is a mechanical accessory used to connect rebars. It is primarily used in reinforced concrete structures to connect the rebars and transmit force, thereby ensuring the integrity and stability of the reinforced concrete structure. A large number of electric rebar wrenches are required when tightening the sleeve.

[0003] like Figure 1 As shown, the existing electric rebar threading wrench includes a lower housing and an upper housing. Both the lower housing and the upper housing are fixedly connected to an insertion port on their right ends. A second locking nut is fixedly connected inside the insertion port. A locking tube is threaded to the left end of the inner wall of the second locking nut. A locking groove is opened inside the inner wall of the locking tube, and the main body of the lithium-ion electric wrench is locked in the locking groove.

[0004] The outer wall of the chuck is fitted with an arc-shaped gear, which requires the additional fabrication of an arc-shaped gear. This gear is thin-walled and ring-shaped, with low strength, and is prone to deformation after heat treatment. This increases the difficulty of assembly when it is assembled with the chuck, making it less strong than an integral geared chuck.

[0005] The shell consists of a lower shell and an upper shell. These parts are mostly made of cast aluminum alloy, which has low structural strength, is prone to cracking, and is heavy and difficult to lift. They are only suitable for processing horizontal reinforcement, not for twisting column reinforcement. Some wrenches are designed with too wide heads, making them unusable in places with dense reinforcement, such as reinforced shear walls, beams and reinforcement cages. Summary of the Invention

[0006] The purpose of this invention is to provide an open-end rebar wrench. By incorporating a plate assembly including a cover plate and a base plate, and using high-strength, high-hardness alloy sheet, it can be designed to be relatively thin and light, resulting in a lighter weight and easier lifting when tightening column reinforcement. Due to the smaller outer diameter of the open-end wheel, the heads of the cover plate and base plate are narrower, allowing for use in areas with dense reinforcement, such as reinforced shear walls, beams, and rebar cages. Currently, most plate assemblies on the market are made of cast aluminum alloy, which has lower strength and is prone to cracking, thus requiring a thicker and heavier design, resulting in a larger overall weight and wider plate assembly dimensions.

[0007] This application provides an open-end rebar wrench, comprising:

[0008] Drive motor, used to provide power;

[0009] The transmission device is connected to the drive motor; and

[0010] A plate assembly is disposed in front of the drive motor; the transmission device is disposed in the plate assembly, and the front end of the plate assembly is provided with an opening; the plate assembly includes a cover plate and a bottom plate; an accommodating space is formed between the cover plate and the bottom plate; the transmission device is disposed within the accommodating space; the cover plate and the bottom plate are connected by a support member;

[0011] The transmission device includes:

[0012] The central gear shaft is connected to the drive motor and is driven to rotate by the drive motor;

[0013] Side gears mesh with the central gear shaft; there are at least two side gears; and

[0014] An open rotor has a radial opening at its front end; gear teeth are provided on the outer circumference of the open rotor; the gear teeth mesh with the side gear; the open rotor is configured to maintain meshing with the side gear during its rotational motion; an open guide ring is provided at the front end of the base plate to guide the rotation of the open rotor; and a rebar clamp is provided on the open rotor for clamping rebar.

[0015] Preferably, a first sliding groove is provided on the upper end face of the open rotor on one side of the radial opening; a second sliding groove is provided on the upper end face of the open rotor on the other side of the radial opening, and the first sliding groove and the second sliding groove are arranged intersectingly.

[0016] The steel bar clamp includes:

[0017] The first tooth block; slidably installed within the first sliding groove; and

[0018] The second toothed block is adjustablely installed within the second sliding groove; the first and second toothed blocks work together to clamp the reinforcing bar.

[0019] Preferably, a blocking part is provided at the front end of the first sliding groove; an elastic member is provided on the open rotor, and the elastic member provides a force to move the first tooth block toward the blocking part.

[0020] Preferably, the elastic component is a first torsion spring; the first torsion spring is mounted on the open rotor; one end of the first torsion spring abuts against the open rotor; the other end of the first torsion spring abuts against the rear end of the first tooth block.

[0021] Preferably, a locking block is provided on the side of the second sliding groove; the locking block is slidably mounted on the open rotor; the locking block can lock the second tooth block.

[0022] Preferably, the part where the locking block and the second tooth block engage is provided with ratchet teeth. When the ratchet teeth on the locking block and the second tooth block are in a biting state, the locking block locks the position of the second tooth block.

[0023] Preferably, a second torsion spring is installed on the open rotor; one end of the second torsion spring abuts against the open rotor; the other end of the second torsion spring abuts against the locking block; the second torsion spring pushes the locking block to lock the second tooth block.

[0024] Preferably, the lower end face of the open rotor is provided with a mounting hole; a rolling bearing is installed in the mounting hole; a pin is installed in the rolling bearing, and the lower end of the pin is inserted into the annular groove of the open guide ring.

[0025] Preferably, it also includes a striking mechanism, which is disposed between the drive motor and the transmission device. The striking mechanism generates an impact torque during impact and transmits the impact torque to the transmission device.

[0026] An outer cylinder is provided between the drive motor and the plate assembly; the striking mechanism is located inside the outer cylinder.

[0027] Preferably, it also includes a reducer and a torque limiter. The drive motor is connected to the transmission device through the reducer and the torque limiter. The reducer is used to reduce the speed of the drive motor and increase the torque, and the torque limiter is used to limit the maximum torque output of the drive motor and protect the drive motor from overload.

[0028] Preferably, the outer cylinder is connected to the front end of the drive motor; an outer cylinder rear cover is installed at the rear end of the outer cylinder; the motor output shaft of the drive motor passes through the outer cylinder rear cover and is connected to and drives the striking mechanism.

[0029] Preferably, it also includes a planetary reduction mechanism; the planetary reduction mechanism is located at the front end of the striking mechanism; the planetary reduction mechanism includes: a planet carrier b, planetary gears b, and a gear ring b; the front end of the torque output shaft of the striking mechanism is provided with a gear portion, and the gear portion of the torque output shaft of the striking mechanism meshes with the planetary gears b inside the planet carrier b; a gear ring b is provided inside the outer cylinder; the planetary gears b mesh with the gear ring b.

[0030] Preferably, the planetary reduction mechanism is connected to the transmission device via a bevel gear set; the bevel gear set includes a small bevel gear and a large bevel gear; the small bevel gear is connected to the planet carrier b; the large bevel gear is mounted on the journal of the central gear shaft, and the small bevel gear and the large bevel gear mesh.

[0031] Preferably, the front end of the outer cylinder is connected to the plate assembly via a connector; the connector has a first mounting portion and a second mounting portion; the first mounting portion is connected to the front end of the outer cylinder; the first mounting portion is connected to the top cover; the top cover and the second mounting portion clamp the plate assembly.

[0032] Preferably, a guide rail is provided on one side of the plate assembly; a clamping assembly is installed on the guide rail.

[0033] Preferably, the clamping assembly includes: a sliding sleeve, a third clamping block, and a fourth clamping block; the sliding sleeve is slidably mounted on the guide rail; the third clamping block is mounted on the sliding sleeve; the fourth clamping block is connected to the third clamping block; clamping is performed by the third clamping block and the fourth clamping block.

[0034] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0035] 1. This invention, by setting the plate assembly including a cover plate and a base plate, and using high-strength, high-hardness 65Mn alloy sheet material, allows for a relatively thin and light design, resulting in lighter weight and easier lifting when tightening column reinforcement. Due to the small outer diameter of the open-end wheel, the heads of the cover plate and base plate are narrower, enabling use in areas with dense reinforcement, such as reinforced shear walls, beams, and reinforcement cages. Currently, most shells on the market are made of cast aluminum alloy, which has lower strength and is prone to cracking, requiring a thicker and heavier design, resulting in a larger overall weight and wider plate assembly dimensions.

[0036] 2. This invention features a first sliding groove and a second sliding groove arranged crosswise on an open-end rotating wheel; a first tooth block is slidably installed in the first sliding groove; and a second tooth block is adjustablely installed in the second sliding groove. The first and second tooth blocks are located at the upper end of the open-end rotating wheel and are exposed. The structure is simple, and the position of the second tooth block can be easily adjusted without increasing the cost of tool reserves on the construction site or the time cost of finding and matching such external tools. The wear condition of the first and second tooth blocks can be easily observed, and they are also easy to replace.

[0037] 3. The present invention features a radial opening at the front end of the open-ended rotating wheel; gear teeth are directly provided on the outer circumference of the open-ended rotating wheel, and the whole structure is designed as an integrated structure, which has high strength and a more compact and efficient appearance.

[0038] 4. When the reinforcing bar is inserted into the radial opening, the first tooth block can be pushed backward to facilitate its entry into the radial opening; by providing a first torsion spring to provide a force for the first tooth block to move closer to the blocking part, the first tooth block can more firmly hold the reinforcing bar.

[0039] 5. This invention features ratchet teeth at the engagement point of the locking block and the second toothed block, allowing the ratchet teeth on the locking block to better engage with the ratchet teeth on the second toothed block, thereby locking the position of the second toothed block. One end of the second torsion spring abuts against the opening wheel, and the other end abuts against the locking block. Without applying external force, the locking block can firmly engage with the second toothed block. When the position of the second toothed block needs to be adjusted, the locking block is pushed to release the engagement between the locking block and the second toothed block. At this time, the second toothed block is pushed to adjust its position within the second sliding groove. After adjustment, the locking block is released, and under the thrust of the second torsion spring, the locking block engages with the second toothed block, allowing for convenient adjustment of the position of the second toothed block. This, in turn, adjusts the opening size of the first and second toothed blocks, thus accommodating steel bars of different diameters.

[0040] 6. The present invention connects the power output gear shaft of the power device through the outer cylinder rear cover to the striking mechanism for transmission, and the rear cover bears the recoil force when the striking mechanism strikes, thus preventing the recoil force generated during the strike from damaging the power device. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of an electric wrench for threading steel bars in the prior art.

[0042] Figure 2 This is a schematic diagram of the overall structure of an open-type rebar wrench according to the present invention.

[0043] Figure 3 This is a schematic diagram of the handle a structure of the present invention.

[0044] Figure 4 , Figure 5 This is an exploded structural diagram of an open-type rebar wrench according to the present invention.

[0045] Figure 6 This is a schematic diagram of the striking mechanism of the present invention.

[0046] Figure 7 , Figure 8 , Figure 9 This is a schematic diagram of the explosive structure of the striking mechanism of the present invention.

[0047] Figure 10 This is a schematic diagram of the connector structure of the present invention.

[0048] Figure 11 This is a schematic diagram of the transmission device structure of the present invention.

[0049] Figure 12 This is a schematic diagram of the base plate structure of the present invention.

[0050] Figure 13 This is a schematic diagram of the bevel gear set structure of the present invention.

[0051] Figure 14 This is a schematic diagram of the open rotor structure of the present invention.

[0052] Figure 15 This is a schematic diagram of the second sliding groove structure of the present invention.

[0053] Figure 16 This is a schematic diagram of the first sliding groove structure of the present invention.

[0054] Figure 17 This is a schematic diagram of the pin structure of the present invention.

[0055] Figure 18 This is a schematic diagram of the card block structure of the present invention.

[0056] Figure 19 This is a schematic diagram of the clamping assembly structure of the present invention.

[0057] Figure 20 This is a schematic diagram of the fourth slide groove structure of the present invention.

[0058] Icon labels:

[0059] 10-Drive motor; 20-Outer cylinder; 30-Plate assembly; 40-Bevel gear set; 50-Transmission device; 11-Impact mechanism; 12-Reduction mechanism; 111-Ring gear a; 112-Planet carrier a; 113-Planet gear a; 114-Spindle; 115-Compression spring; 116-Impact block; 117-Torque output shaft; 121-Planet carrier b; 122-Planet gear b; 123-Ring gear b; 101-Motor output shaft; 21-Outer cylinder rear cover; 31-Cover plate; 32-Base plate; 33-Handle a; 34-Top cover; 35-Connector; 351-First mounting part; 352-Second mounting part; 321-Open guide ring; 41-Small bevel gear; 42-Large bevel gear ; 51-Central gear shaft; 52-Side gear; 531-First sliding groove; 532-Second sliding groove; 533-First mounting hole; 534-Second mounting hole; 535-Open rotor; 536-Radial opening; 537-Gear tooth; 538-Mounting hole; 539-Pin; 5310-Rolling bearing; 5311-Blocking part; 61-First tooth block; 62-First torsion spring; 63-First mounting post; 71-Second tooth block; 72-Clamping block; 73-Second torsion spring; 74-Second mounting post; 81-Guide rail; 82-Sliding sleeve; 83-Third clamping block; 84-Fourth clamping block; 85-Handle b; 811-Third sliding groove; 812-Roller; 821-Fourth sliding groove. Detailed Implementation

[0060] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or it can be an element placed in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0063] To address the issue of existing shells consisting of a lower shell and an upper shell, see [reference needed]. Figure 1 The complete enclosure of the transmission mechanism presents technical challenges related to heat dissipation and disassembly; please refer to [reference needed]. Figure 2-20 This invention provides an open-type rebar wrench, comprising:

[0064] The drive motor 10 is used to provide power; the drive motor 10 can be any type of motor, such as a brushed motor, a brushless motor, a servo motor, or a stepper motor, and the device is powered by the drive motor 10.

[0065] Transmission device 50 is connected to drive motor 10; and

[0066] Plate assembly 30 is located in front of drive motor 10; transmission device 50 is located in plate assembly 30, and the front end of plate assembly 30 is provided with an opening; the front end of open rotor 535 is provided with radial opening 536; when the radial opening 536 at the front end of open rotor 535 coincides with the opening at the front end of plate assembly 30, the device can be directly clamped from the side of the reinforcing bar.

[0067] The plate assembly 30 includes a cover plate 31 and a base plate 32; a receiving space is formed between the cover plate 31 and the base plate 32; a transmission device 50 is disposed within the receiving space; the cover plate 31 and the base plate 32 are connected by a support member; the transmission device 50 is disposed within the receiving space; an open guide ring 321 is provided at the front end of the base plate 32, which guides the rotation of the open rotor 535. By setting a receiving space between the cover plate 31 and the base plate 32, and disposing of the transmission device 50 within the receiving space, space can be saved, allowing the wrench head to be thinner and smaller; wherein, the open guide ring 321 at the front end of the base plate 32 is aligned with the front opening of the plate assembly 30.

[0068] The cover plate 31 and base plate 32 are made of high-strength, high-hardness alloy sheet 65Mn. They are strong, not easily cracked, and can be designed to be relatively thin and light, resulting in a lighter weight and easier lifting when tightening column reinforcement. Due to the smaller outer diameter of the open rotor, the heads of the cover plate 31 and base plate 32 are narrower, allowing for use in areas with dense reinforcement, such as reinforced shear walls, beams, and reinforcement cages. In contrast, most plate assemblies on the market currently use cast aluminum alloy, which has lower strength and is prone to cracking, requiring a thicker and heavier design, resulting in a larger overall weight and wider dimensions.

[0069] Preferably, a handle a33 can also be installed on the side of the cover plate 31 and the bottom plate 32, so that the operator can hold the drive motor 10 with one hand and the handle a33 with the other hand, making it convenient to use the device.

[0070] The transmission device 50 includes:

[0071] The central gear shaft 51 is connected to the drive motor 10 and is driven to rotate by the drive motor 10;

[0072] Side gears 52 mesh with the central gear shaft 51; there are at least two side gears 52; preferably, there are two side gears 52, distributed on both sides of the central gear shaft 51. During the rotation of the open rotor 535, at least one side gear 52 remains meshed with the open rotor 535. In this way, when one side gear 52 enters the radial opening 536 area at the front end of the open rotor 535, the other side gear 52 can still drive the open rotor 535 to continue rotating, ensuring that the two side gears 52 can smoothly cross the radial opening 536, thereby ensuring that the power transmission is uninterrupted.

[0073] An open rotor 535 has a radial opening 536 at its front end; gear teeth 537 are provided on the outer circumference of the open rotor 535; the gear teeth 537 mesh with a side gear 52; the open rotor 535 is configured to maintain meshing with the side gear 52 during its rotational movement; an open guide ring 321 is provided at the front end of the base plate 32, which guides the rotation of the open rotor 535; a rebar clamp is provided on the open rotor 535 for clamping rebars;

[0074] The working principle is as follows: the drive motor 10 drives the central gear shaft 51 to rotate; the central gear shaft 51 drives the side gear 52 meshing with it to rotate; the side gear 52 drives the open rotor 535 to rotate; when the radial opening 536 at the front end of the open rotor 535 coincides with the opening at the front end of the plate assembly 30, the device can be directly clamped from the side of the steel bar; the steel bar or sleeve is clamped by the cooperation of the first tooth block 61 and the second tooth block 71, and then the steel bar or sleeve is driven to rotate together.

[0075] In another embodiment of this invention, a first sliding groove 531 is provided on the upper end surface of the open rotor 535 and on the side of the radial opening 536;

[0076] A second sliding groove 532 is provided on the upper end face of the open rotor 535 and on the other side of the radial opening 536. The first sliding groove 531 and the second sliding groove 532 are arranged intersectingly. By providing the radial opening 536, the reinforcing bar can be easily entered into the open rotor 535. By providing gear teeth 537 on the outer circumference of the open rotor 535, the open rotor 535 can be easily driven to rotate.

[0077] See Figure 15 The first sliding groove 531 is disposed on the right side of the open rotor 535. The sliding direction of the first sliding groove 531 and the second sliding groove 532 is at an angle α, which ranges from 30° to 150°. In this embodiment, the angle α is 110°. (See also...) Figure 15 The second sliding groove 532 is provided on the left side of the open rotor 535; the second sliding groove 532 is perpendicular to the central axis of the open rotor 535.

[0078] Rebar clamps, including:

[0079] The first tooth block 61 is slidably installed in the first sliding groove 531; and

[0080] The second toothed block 71 is adjustablely installed within the second sliding groove 532; it clamps the reinforcing bar through the cooperation of the first toothed block 61 and the second toothed block 71. By intersecting the first sliding groove 531 and the second sliding groove 532 on the open rotor 535, and with the second toothed block 71 adjustablely installed within the second sliding groove 532, the structure is simple. It allows for easy adjustment of the position of the second toothed block 71 without increasing the cost of on-site tool reserves or the time cost of finding and matching such external tools. The wear condition of the first toothed block 61 and the second toothed block 71 is easily observed, and they are also easy to replace.

[0081] In another embodiment of this invention, a blocking portion 5311 is provided at the front end of the first sliding groove 531; an elastic member is provided on the open rotor 535, the elastic member providing a force for the first tooth block 61 to move towards the blocking portion 5311. (See also...) Figure 14 The blocking part 5311 is provided at the front of the first sliding groove 531; the blocking part 5311 covers a small part of the front end of the first tooth block 61, thereby restricting the position of the first tooth block 61 at the foremost end in the first sliding groove 531; when the reinforcing bar of the present invention is inserted into the radial opening, it can push the first tooth block 61 backward to facilitate its entry into the radial opening; by providing a first torsion spring to provide a force for the first tooth block 61 to move closer to the blocking part 5311, the first tooth block 61 can more firmly hold the reinforcing bar.

[0082] In another embodiment of this invention, the elastic component is a first torsion spring 62; the first torsion spring 62 is mounted on the open rotor 535; one end of the first torsion spring 62 abuts against the open rotor 535; the other end of the first torsion spring 62 abuts against the rear end of the first tooth block 61. By providing the first torsion spring 62, a force is provided to push the first tooth block 61 toward the blocking part, so that when the rebar is inserted into the radial opening 536, the first tooth block 61 can be pushed backward to facilitate its entry into the radial opening; at the same time, the force provided by the first torsion spring 62 to push the first tooth block 61 toward the blocking part 5311 can make the first tooth block 61 more firmly abut against the rebar. Preferably, the open rotor 535 is provided with a first mounting hole 533, see reference. Figure 14 and 17 The first mounting hole 533 is located to the left rear of the first sliding groove 531. The first mounting post 63 is installed in the first mounting hole 533. The first torsion spring 62 is sleeved on the first mounting post 63. One end of the first torsion spring 62 abuts against the open rotor 535, and the other end of the first torsion spring 62 abuts against the rear end of the first tooth block 61.

[0083] In another embodiment of this invention, a locking block 72 is provided on the side of the second sliding groove 532; the locking block 72 is slidably mounted on the open rotor 535; the locking block 72 can lock the second tooth block 71. By setting the locking block 72 to lock the second tooth block 71, the position of the second tooth block 71 in the second sliding groove 532 can be locked. In this embodiment, the second tooth block 71 can also be tightened by setting bolts on the side of the second sliding groove 532; after loosening the bolts, the position of the second tooth block 71 in the second sliding groove 532 can be adjusted.

[0084] In another embodiment of this invention, the part where the locking block 72 and the second tooth block 71 engage is provided with ratchet teeth. When the ratchet teeth on the locking block 72 and the second tooth block 71 are in a biting state, the locking block 72 locks the position of the second tooth block 71. By providing ratchet teeth at the part where the locking block 72 and the second tooth block 71 engage, the ratchet teeth on the locking block 72 can better engage with the ratchet teeth on the second tooth block 71, thereby better locking the position of the second tooth block 71. When moving the position of the second tooth block 71, firstly, the locking block 72 is pulled back to disengage the locking block 72 from the second tooth block 71, then the second tooth block 71 is adjusted to a suitable position, and then the locking block 72 is released, so that the ratchet teeth on the locking block 72 engage with the ratchet teeth on the second tooth block 71, thus relocking the position of the second tooth block 71.

[0085] In another embodiment of this invention, a second torsion spring 73 is installed on the open rotor 535; one end of the second torsion spring 73 abuts against the open rotor 535; the other end of the second torsion spring 73 abuts against the locking block 72; the second torsion spring 73 pushes the locking block 72 to lock the second tooth block 71. With one end of the second torsion spring 73 abutting against the open rotor 535 and the other end abutting against the locking block 72, the elasticity of the second torsion spring 73 allows the locking block 72 to firmly engage with the second tooth block 71. When it is necessary to adjust the position of the second tooth block 71, the locking block 72 is pushed to release the engagement between the locking block 72 and the second tooth block 71. Then, the second tooth block 71 is pushed to adjust its position within the second sliding groove 532. After adjustment, the locking block 72 is released, and under the elasticity of the second torsion spring 73, the locking block 72 locks the second tooth block 71, allowing for convenient adjustment of the position of the second tooth block 71, thereby adjusting the opening size of the first tooth block 61 and the second tooth block 71, thus accommodating steel bars of different diameters. See Figure 14 and 17 The second mounting hole 534 is located to the right rear of the second sliding groove 532. The second mounting post 74 is installed in the second mounting hole 534, and the second torsion spring 73 is sleeved on the second mounting post 74. One end of the second torsion spring 73 abuts against the open rotor 535, and the other end of the second torsion spring 73 abuts against the locking block 72.

[0086] In another embodiment of this invention, an installation hole 538 is provided on the lower end face of the open rotor 535; a rolling bearing 5310 is installed in the installation hole 538; a pin 539 is installed in the rolling bearing 5310. The rolling bearing 5310 can be a needle roller bearing or a ball bearing; the lower end of the pin 539 is inserted into the annular groove of the open guide ring 321; when the open rotor 535 rotates, it is guided by the pin 539 in the annular groove of the open guide ring 321. Since the pin 539 and the side wall of the annular groove of the open guide ring 321 adopt a rolling contact method, the friction between the pin 539 and the open guide ring 321 can be reduced, thereby increasing the service life of the pin 539 and the open guide ring 321.

[0087] In another embodiment of this invention, a striking mechanism 11 is also included. The striking mechanism 11 is disposed between the drive motor 10 and the transmission device 50. The striking mechanism 11 generates an impact torque during impact and transmits the impact torque to the transmission device 50.

[0088] An outer cylinder 20 is provided between the drive motor 10 and the plate assembly 30; the striking mechanism 11 is located inside the outer cylinder 20. The drive motor 10 drives the central gear shaft 51 to rotate; the central gear shaft 51 drives the side gear 52 meshing with it to rotate, and the side gear 52 drives the open rotor 535 to rotate. When the radial opening 536 at the front end of the open rotor 535 coincides with the opening at the front end of the plate assembly 30, the device can be directly clamped from the side of the reinforcing bar; the reinforcing bar or sleeve is clamped by the cooperation of the first tooth block 61 and the second tooth block 71, and then the reinforcing bar or sleeve is driven to rotate together; the outer cylinder 20 is provided between the drive motor 10 and the plate assembly 30 and the striking mechanism 11 is located inside the outer cylinder 20; the outer wall of the outer cylinder 20 is provided with heat dissipation grooves and fins, which can accelerate the heat dissipation of the striking mechanism 11 and prevent the temperature from being too high, causing premature wear.

[0089] The striking mechanism 11 includes: a spindle 114, an impact block 116 sleeved on the front of the spindle 114; a planetary carrier a112 is provided under the spindle 114; a compression spring 115 is provided between the impact block 116 and the planetary carrier a112; a V-groove is provided in the impact block 116; a V-groove with opposite directions is provided on the spindle 114, and a steel ball 1141 is provided in the V-groove of the impact block 116 and the spindle 114; a planetary gear a113 is installed in the planetary carrier a112; the planetary gear a113 meshes with a gear ring a111 installed in the rear cover 21 at the rear of the outer cylinder 20; the motor output shaft 101 at the front end of the drive motor 10 meshes with the planetary gear a113; and a torque output shaft 117 is fitted to the impact block 116. When the load increases, the impact block 116 can no longer drive the torque output shaft 117 to rotate. At this time, the motor output shaft 101 at the front end of the drive motor 10 drives the planetary gear a113 to rotate. The planetary gear a113 drives the spindle 114 to rotate. The spindle 114 transmits power to the impact block 116 through the steel balls. The impact block 116 is subjected to the force of the steel balls, moves backward on the spindle 114 and compresses the compression spring 115. The protrusion on the impact block 116 disengages from the torque output shaft 117. Under the elastic force of the compression spring 115 and the force of the spindle 114, the compression potential energy is converted into rotational kinetic energy, and strikes the torque output shaft 117 through the protrusion on the impact block 116, thus realizing the impact torque. The output torque can be increased according to the increase of the load.

[0090] In another embodiment of this invention, a speed reducer and a torque limiter are also included. The drive motor 10 is connected to the transmission device 50 through the speed reducer and the torque limiter. The speed reducer is used to reduce the speed of the drive motor 10 and increase the torque. The torque limiter is used to limit the maximum torque output by the drive motor 10 and protect the drive motor 10 from overload.

[0091] In another embodiment of this invention, the outer cylinder 20 is connected to the front end of the drive motor 10; the rear end of the outer cylinder 20 is fitted with an outer cylinder rear cover 21; the motor output shaft 101 of the drive motor 10 passes through the outer cylinder rear cover 21 and is connected to and drives the striking mechanism 11. The rear cover 21 bears the recoil force when the striking mechanism 11 strikes, preventing the recoil force generated during the strike from damaging the drive motor 10.

[0092] In another embodiment of this invention, a planetary reduction mechanism 12 is also included. The planetary reduction mechanism 12 is located at the front end of the striking mechanism 11. The planetary reduction mechanism 12 includes a planet carrier b121, planetary gears b122, and a gear ring b123. A gear portion is provided at the front end of the torque output shaft 117 of the striking mechanism 11, and the gear portion of the torque output shaft 117 of the striking mechanism 11 meshes with the planetary gears b122 inside the planet carrier b121. A gear ring b123 is provided inside the outer cylinder 20. The planetary gears b122 mesh with the gear ring b123. The torque output shaft 117 of the striking mechanism 11 drives the planetary gears b122 inside the planet carrier b121 to rotate, and the planetary gears b122 drive the planet carrier b121 to rotate. The planetary reduction mechanism 12 can reduce the speed of the torque output shaft 117.

[0093] In another embodiment of this invention, the planetary reduction mechanism 12 is connected to the transmission device 50 via a bevel gear set 40. The bevel gear set 40 includes a small bevel gear 41 and a large bevel gear 42. The small bevel gear 41 is connected to the planet carrier b121. The large bevel gear 42 is mounted on the journal of the central gear shaft 51. The small bevel gear 41 and the large bevel gear 42 mesh, and the small bevel gear 41 drives the large bevel gear 42 to rotate. The large bevel gear 42 drives the central gear shaft 51 to rotate, thereby transmitting power.

[0094] In another embodiment of this invention, the front end of the outer cylinder 20 is connected to the plate assembly 30 via a connector 35. The connector 35 has a first mounting portion 351 and a second mounting portion 352. The first mounting portion 351 is connected to the front end of the outer cylinder 20 and to the upper cover 34. The upper cover 34 and the second mounting portion 352 clamp the plate assembly 30. A bearing is installed inside the first mounting portion 351 to support the rotation of the planetary carrier b121. By clamping the plate assembly 30 with the upper cover 34 and the second mounting portion 352, the rear part of the plate assembly 30 can be covered, clamped, and fixed.

[0095] In another embodiment of this invention, a guide rail 81 is provided on one side of the plate assembly 30; a clamping assembly is mounted on the guide rail 81. For the case of the rebar sleeve, please refer to... Figure 18 By setting a clamping assembly on the guide rail 81, the first tooth block 61 and the second tooth block 71 of this device can clamp the steel bar at one end of the sleeve, and the clamping assembly clamps the steel bar at the other end of the sleeve. The first tooth block 61 and the second tooth block 71 drive the steel bar to rotate, thereby achieving simultaneous tightening of the steel bars at both ends of the sleeve. This allows for single-person tightening, eliminating the need for two people, one to fix one end and the other to tighten the other end, as is required with ordinary steel bar wrenches.

[0096] In another embodiment of this invention, the clamping assembly includes: a sliding sleeve 82, a third clamping block 83, and a fourth clamping block 84; the sliding sleeve 82 is slidably mounted on a guide rail 81; the third clamping block 83 is mounted on the sliding sleeve 82; the fourth clamping block 84 is connected to the third clamping block 83; clamping is performed by the third clamping block 83 and the fourth clamping block 84; preferably, a third sliding groove 811 is provided on the guide rail 81, a fourth sliding groove 821 is provided inside the sliding sleeve 82, and rollers 812 are rotatably mounted in the third sliding groove 811 and the fourth sliding groove 821. Preferably, a handle b85 is provided on the fourth clamping block 84; a torsion spring is provided on the third clamping block 83, one end of the torsion spring is connected to the third clamping block 83, and the other end of the torsion spring is connected to the fourth clamping block 84, so that the fourth clamping block 84 is pressed against the third clamping block 83, and the fourth clamping block 84 is moved away from the third clamping block 83 by moving the handle b85.

[0097] The present invention also includes at least the following advantages:

[0098] The present invention features a first sliding groove 531 and a second sliding groove 532 intersecting on an open rotor 535; a second tooth block 71 is adjustablely installed in the second sliding groove 532; the first tooth block 61 and the second tooth block 71 are located at the upper end of the open rotor 535 and exposed. The structure is simple and allows for easy adjustment of the position of the second tooth block 71. It does not require additional tool reserves on the construction site or time costs for finding and matching such external tools. The wear of the first tooth block 61 and the second tooth block 71 can be easily observed and they can be easily replaced.

[0099] See Figure 14 The blocking part 5311 is provided at the front of the first sliding groove 531; the blocking part 5311 covers a small part of the front end of the first tooth block 61, thereby restricting the position of the first tooth block 61 at the foremost end in the first sliding groove 531; when the reinforcing bar of the present invention is inserted into the radial opening, it can push the first tooth block 61 backward to facilitate its entry into the radial opening; by providing a first torsion spring to provide a force for the first tooth block 61 to move closer to the blocking part 5311, the first tooth block 61 can more firmly hold the reinforcing bar.

[0100] By providing a first torsion spring 62 to force the first tooth block 61 to move closer to the blocking part, the first tooth block 61 can be pushed backward when the steel bar is inserted into the radial opening 536, thus facilitating its entry into the radial opening; at the same time, the force provided by the first torsion spring 62 to force the first tooth block 61 to move closer to the blocking part 5311 can make the first tooth block 61 more firmly abut against the steel bar.

[0101] The open rotor 535 is provided with a first mounting hole 533, see reference. Figure 14 and 17The first mounting hole 533 is located to the left rear of the first sliding groove 531. The first mounting post 63 is installed in the first mounting hole 533. The first torsion spring 62 is sleeved on the first mounting post 63. One end of the first torsion spring 62 abuts against the open rotor 535, and the other end of the first torsion spring 62 abuts against the rear end of the first tooth block 61.

[0102] By setting the locking block 72 to lock the second tooth block 71, the position of the second tooth block 71 in the second sliding groove 532 can be locked. In this embodiment, the second tooth block 71 can also be tightened by setting a bolt on the side of the second sliding groove 532; after loosening the bolt, the position of the second tooth block 71 in the second sliding groove 532 can be adjusted.

[0103] By setting ratchet teeth at the point where the locking block 72 and the second tooth block 71 engage, the ratchet teeth on the locking block 72 can better bite the ratchet teeth on the second tooth block 71, thereby better locking the position of the second tooth block 71. When moving the position of the second tooth block 71, first pull the locking block 72 backward to disengage the locking block 72 from the second tooth block 71, then adjust the second tooth block 71 to the appropriate position, and then release the locking block 72 so that the ratchet teeth on the locking block 72 bite the ratchet teeth on the second tooth block 71, thus relocking the position of the second tooth block 71.

[0104] One end of the second torsion spring 73 abuts against the open rotor 535, and the other end abuts against the locking block 72. The elastic force of the second torsion spring 73 allows the locking block 72 to firmly engage with the second toothed block 71. When it is necessary to adjust the position of the second toothed block 71, the locking block 72 is pushed to disengage it from the second toothed block 71. Then, the second toothed block 71 is pushed to adjust its position within the second sliding groove 532. After adjustment, the locking block 72 is released, and under the elastic force of the second torsion spring 73, it locks the second toothed block 71 in place. This allows for easy adjustment of the position of the second toothed block 71, thereby adjusting the opening size of the first toothed block 61 and the second toothed block 71 to accommodate steel bars of different diameters. (See reference...) Figure 14 and 17 The second mounting hole 534 is located to the right rear of the second sliding groove 532. The second mounting post 74 is installed in the second mounting hole 534, and the second torsion spring 73 is sleeved on the second mounting post 74. One end of the second torsion spring 73 abuts against the open rotor 535, and the other end of the second torsion spring 73 abuts against the locking block 72.

[0105] The drive motor 10 drives the central gear shaft 51 to rotate; the central gear shaft 51 drives the side gear 52 meshing with it to rotate, and the side gear 52 drives the open rotor 535 to rotate. When the radial opening 536 at the front end of the open rotor 535 coincides with the opening at the front end of the plate assembly 30, the device can be directly clamped from the side of the reinforcing bar; the reinforcing bar or sleeve is clamped by the cooperation of the first tooth block 61 and the second tooth block 71, and then the reinforcing bar or sleeve is driven to rotate together. The outer cylinder 20 is set between the drive motor 10 and the plate assembly 30, and the striking mechanism 11 is located inside the outer cylinder 20; the outer wall of the outer cylinder 20 is provided with heat dissipation grooves and fins, which can accelerate the heat dissipation of the striking mechanism 11 and prevent the temperature from being too high, causing premature wear.

[0106] The cover plate 31 and base plate 32 are made of high-strength, high-hardness alloy sheet 65Mn. They are strong, not easily cracked, and can be designed to be relatively thin and light, resulting in a lighter weight and easier lifting when tightening column reinforcement. Due to the smaller outer diameter of the open rotor, the heads of the cover plate 31 and base plate 32 are narrower, allowing for use in areas with dense reinforcement, such as reinforced shear walls, beams, and reinforcement cages. In contrast, most plate assemblies on the market currently use cast aluminum alloy, which has lower strength and is prone to cracking, requiring a thicker and heavier design, resulting in a larger overall weight and wider dimensions.

[0107] For the case of rebar sleeves, please refer to... Figure 18 By setting a clamping assembly on the guide rail 81, the first tooth block 61 and the second tooth block 71 of this device can clamp the steel bar at one end of the sleeve, and the clamping assembly clamps the steel bar at the other end of the sleeve. The first tooth block 61 and the second tooth block 71 drive the steel bar to rotate, thereby achieving simultaneous tightening of the steel bars at both ends of the sleeve. This allows for single-person tightening, eliminating the need for two people, one to fix one end and the other to tighten the other end, as is required with ordinary steel bar wrenches.

[0108] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0109] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An open-type rebar wrench, characterized in that, include: Drive motor (10) is used to provide power; The transmission device (50) is connected to the drive motor (10); and A plate assembly (30) is disposed in front of the drive motor (10); a transmission device (50) is disposed in the plate assembly (30), and the front end of the plate assembly (30) is provided with an opening; the plate assembly (30) includes a cover plate (31) and a bottom plate (32); an accommodating space is formed between the cover plate (31) and the bottom plate (32); the transmission device (50) is disposed in the accommodating space; The cover plate (31) and the bottom plate (32) are connected by a support member; The transmission device (50) includes: The central gear shaft (51) is connected to the drive motor (10) and is driven to rotate by the drive motor (10); Side gears (52) mesh with the central gear shaft (51); there are at least two side gears (52); and An open rotor (535) has a radial opening (536) at its front end; gear teeth (537) are provided on the outer circumference of the open rotor (535); the gear teeth (537) mesh with the side gear (52); the open rotor (535) is configured to maintain meshing with the side gear (52) during the rotation of the open rotor (535); an open guide ring (321) is provided at the front end of the base plate (32), and the open guide ring (321) guides the rotation of the open rotor (535); a steel bar clamp is provided on the open rotor (535) for clamping steel bars.

2. The open-type rebar wrench according to claim 1, characterized in that, A first sliding groove (531) is provided on the upper end surface of the open rotor (535) and on one side of the radial opening (536); a second sliding groove (532) is provided on the upper end surface of the open rotor (535) and on the other side of the radial opening (536), and the first sliding groove (531) and the second sliding groove (532) are arranged intersectingly. The steel bar clamp includes: The first tooth block (61) is slidably installed in the first sliding groove (531); and The second tooth block (71) is installed in the second sliding groove (532) in an adjustable position; the first tooth block (61) and the second tooth block (71) are used to clamp the reinforcing bar.

3. The open-type rebar wrench according to claim 2, characterized in that, The first sliding groove (531) has a blocking part (5311) at its front end; the open rotor (535) has an elastic member, which provides a force for the first tooth block (61) to move toward the blocking part (5311).

4. The open-type rebar wrench according to claim 3, characterized in that, The elastic component is a first torsion spring (62); the first torsion spring (62) is mounted on the open rotor (535); one end of the first torsion spring (62) abuts against the open rotor (535); the other end of the first torsion spring (62) abuts against the rear end of the first tooth block (61).

5. The open-type rebar wrench according to claim 2, characterized in that, A locking block (72) is provided on the side of the second sliding groove (532); the locking block (72) is slidably mounted on the open rotor (535); the locking block (72) can lock the second tooth block (71).

6. The open-type rebar wrench according to claim 5, characterized in that, The locking block (72) and the second tooth block (71) are provided with ratchet teeth at the locking position. When the ratchet teeth on the locking block (72) and the second tooth block (71) are in a biting state, the locking block (72) locks the position of the second tooth block (71).

7. The open-type rebar wrench according to claim 5 or 6, characterized in that, A second torsion spring (73) is installed on the open rotor (535); one end of the second torsion spring (73) abuts against the open rotor (535); the other end of the second torsion spring (73) abuts against the locking block (72); the second torsion spring (73) pushes the locking block (72) to lock the second tooth block (71).

8. The open-type rebar wrench according to any one of claims 1-6, characterized in that, The lower end face of the open rotor (535) is provided with a mounting hole (538); a rolling bearing (5310) is installed in the mounting hole (538); a pin (539) is installed in the rolling bearing (5310), and the lower end of the pin (539) is inserted into the annular groove of the open guide ring (321).

9. The open-type rebar wrench according to claim 1, characterized in that, It also includes a striking mechanism (11), which is disposed between the drive motor (10) and the transmission device (50). The striking mechanism (11) generates an impact torque during impact and transmits the impact torque to the transmission device (50). An outer cylinder (20) is provided between the drive motor (10) and the plate assembly (30); the striking mechanism (11) is located inside the outer cylinder (20).

10. The open-type rebar wrench according to claim 1, characterized in that, It also includes a speed reducer and a torque limiter. The drive motor (10) is connected to the transmission device (50) through the speed reducer and the torque limiter. The speed reducer is used to reduce the speed of the drive motor (10) and increase the torque. The torque limiter is used to limit the maximum torque output of the drive motor (10) and protect the drive motor (10) from overload.

11. The open-type rebar wrench according to claim 9, characterized in that, The outer cylinder (20) is connected to the front end of the drive motor (10); the rear end of the outer cylinder (20) is equipped with an outer cylinder rear cover (21); the motor output shaft (101) of the drive motor (10) passes through the outer cylinder rear cover (21) and is connected to and drives the striking mechanism (11).

12. The open-type rebar wrench according to claim 9, characterized in that, It also includes a planetary reduction mechanism (12); the planetary reduction mechanism (12) is located at the front end of the striking mechanism (11); the planetary reduction mechanism (12) includes: a planet carrier b (121), planetary gears b (122) and a gear ring b (123); the front end of the torque output shaft (117) of the striking mechanism (11) is provided with a gear part, and the gear part of the torque output shaft (117) of the striking mechanism (11) meshes with the planetary gears b (122) in the planet carrier b (121); a gear ring b (123) is provided in the outer cylinder (20); the planetary gears b (122) mesh with the gear ring b (123).

13. The open-type rebar wrench according to claim 12, characterized in that, The planetary reduction mechanism (12) is connected to the transmission device (50) via a bevel gear set (40); the bevel gear set (40) includes a small bevel gear (41) and a large bevel gear (42); the small bevel gear (41) is connected to the planet carrier b (121); the large bevel gear (42) is mounted on the journal of the central gear shaft (51), and the small bevel gear (41) and the large bevel gear (42) mesh.

14. The open-type rebar wrench according to claim 9, characterized in that, The front end of the outer cylinder (20) is connected to the plate assembly (30) via a connector (35); the connector (35) has a first mounting part and a second mounting part; the first mounting part is connected to the front end of the outer cylinder (20); the first mounting part is connected to the top cover (34); the top cover (34) and the second mounting part clamp the plate assembly (30).

15. The open-type rebar wrench according to claim 1, characterized in that, A guide rail (81) is provided on one side of the plate assembly (30); a clamping assembly is installed on the guide rail (81).

16. The open-type rebar wrench according to claim 15, characterized in that, The clamping assembly includes: a sliding sleeve (82), a third clamping block (83), and a fourth clamping block (84); the sliding sleeve (82) is slidably mounted on the guide rail (81); the third clamping block (83) is mounted on the sliding sleeve (82); the fourth clamping block (84) is connected to the third clamping block (83); clamping is performed by the third clamping block (83) and the fourth clamping block (84).

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