Sleeve extension rod capable of increasing torque and use method

Abstract

The invention discloses a sleeve extension rod capable of increasing torque and a using method, the sleeve extension rod comprises a torque increasing shell, the torque increasing shell is formed by splicing two half shells, the interior of the torque increasing shell is a hollow torque increasing cavity, a plurality of torque increasing assemblies are arranged in the torque increasing shell, and each torque increasing assembly is in transmission fit with the torque increasing shell; the torques of all the torque-increasing assemblies on the torque-increasing shell are superposed and then counteracted; an input connector is detachably installed in the torque increasing assembly close to one side of the input end, and the input connector is exposed out of one end of the torque increasing shell and forms transmission with the corresponding torque increasing assembly. A telescopic output sleeve rod is arranged on the torque increasing assembly close to one side of the output end, the tail end of the output sleeve rod penetrates through the torque increasing shell and is detachably provided with an output connector, the output connector and the torque increasing assembly form transmission through the output sleeve rod, the counter-acting force on the torque increasing shell is counteracted through the torque increasing assembly, the structure is simplified, cost is reduced, and meanwhile stability is improved. The length of the output sleeve rod is adjustable, the input connector and the output connector are detachable, and applicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of torque-increasing repair tools, in particular to a sleeve connecting rod capable of increasing torque and a use method thereof. Background Art

[0002] Large-scale ground engineering equipment and large-scale underground mining equipment all use large-size, high-strength bolts and high-torque fastening at the joints of components in consideration of operating capacity and safety protection. However, in later use and maintenance, it is not possible to completely follow the steps of disassembly from small to large, from top to bottom, and from light to heavy. Generally, damaged components are disassembled and repaired after implementing safety measures. However, large-size components, high-strength, high-torque bolt fastening and disassembly present great disassembly difficulty and safety risks.

[0003] There are some torque wrenches in the prior art, such as "An Electric Torque Wrench" with the authorization announcement number CN109551413B, which have the following problems: 1. The device usually requires additional fulcrums or external drive devices to offset the reaction force of the torque-increasing component on the device, which results in a more complex structure and a larger volume, and is not suitable for narrow places. At the same time, when an external drive device is introduced, the stability of the entire torque-increasing process may be affected during the torque-increasing process; 2. The output end of the device may be removable, but the input end is usually fixed and difficult to replace according to actual operating conditions. The overall length generally cannot be changed, resulting in poor applicability. Summary of the invention

[0004] The invention provides a sleeve connecting rod capable of increasing torque and a method for using the sleeve connecting rod, aiming to solve the problems that the existing torque increasing wrench requires an external component to offset the reaction force, resulting in poor stability, inconvenient disassembly, and poor applicability due to the inability to change the length.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A sleeve connecting rod capable of increasing torque comprises a torque increasing shell, the torque increasing shell is assembled from two half shells and the interior is a hollow torque increasing cavity, a plurality of torque increasing components are arranged inside the torque increasing shell, each torque increasing component forms a transmission match with the torque increasing shell, and the torques of the torque increasing shell by all the torque increasing components are superimposed and then offset; An input connector is detachably mounted in the torque increasing assembly near the input end, and the input connector is exposed from one end of the torque increasing housing and forms a transmission with the corresponding torque increasing assembly; A retractable output sleeve rod is provided on the torque increasing assembly near the output end, and the end of the output sleeve rod penetrates the torque increasing housing and is detachably provided with an output joint, which forms a transmission with the torque increasing assembly through the output sleeve rod.

[0006] Preferably, there are at least three torque increasing components, which are a first-stage torque increasing component, a second-stage torque increasing component, and a third-stage torque increasing component from the input end to the output end. The first-stage torque increasing component applies a torque T1 to the torque increasing housing, the second-stage torque increasing component applies a torque T2 to the torque increasing housing, and the third-stage torque increasing component applies a torque T3 to the torque increasing housing, and T1 + T2 + T3 = 0.

[0007] More preferably, the first-stage torque increasing component includes a first-stage planet carrier. At the middle position on the side of the first-stage planet carrier close to the input end, a first-stage sun gear is rotatably provided concentrically and coaxially. On the side of the first-stage sun gear close to the input end, it is coaxially and snap-fitted with the input joint to form synchronous rotation. On the side of the first-stage planet carrier close to the input end, a number of first-stage planetary gear sets are rotatably installed at equal intervals around the first-stage sun gear. On the side of the first-stage planetary gear sets close to the first-stage sun gear, they are all meshed with the first-stage sun gear. On the side of the first-stage planetary gear sets far from the first-stage sun gear, they are all meshed with a first-stage outer ring gear arranged on the inner wall of the torque increasing cavity. The first-stage outer ring gear is concentric and coaxial with the first-stage sun gear.

[0008] Furthermore, the second-stage torque increasing component includes a second-stage planet carrier. At the middle position on the side of the second-stage planet carrier close to the first-stage torque increasing component, a second-stage sun gear is rotatably provided concentrically and coaxially. The second-stage sun gear is concentric and coaxial with the first-stage planet carrier, and on the side of the second-stage sun gear close to the first-stage planet carrier, it is fixedly fitted with the first-stage planet carrier through a connecting block. On the side of the second-stage planet carrier close to the first-stage torque increasing component, a number of second-stage planetary gear sets are rotatably installed at equal intervals around the second-stage sun gear. On the side of the second-stage planetary gear sets close to the second-stage sun gear, they are all meshed with the second-stage sun gear. On the side of the second-stage planetary gear sets far from the second-stage sun gear, they are all meshed with a second-stage outer ring gear arranged on the inner wall of the torque increasing cavity. The second-stage outer ring gear is concentric and coaxial with the second-stage sun gear.

[0009] Even further, the third-stage torque increasing component includes a third-stage planet carrier. At the middle position on the side of the third-stage planet carrier close to the second-stage torque increasing component, a third-stage sun gear is rotatably provided concentrically and coaxially. The third-stage sun gear is concentric and coaxial with the second-stage planet carrier, and on the side of the third-stage sun gear close to the second-stage planet carrier, it is fixedly fitted with the second-stage planet carrier through a connecting block. On the side of the third-stage planet carrier close to the second-stage torque increasing component, a number of third-stage planetary gear sets are rotatably installed at equal intervals around the third-stage sun gear. On the side of the third-stage planetary gear sets close to the third-stage sun gear, they are all meshed with the third-stage sun gear. On the side of the third-stage planetary gear sets far from the third-stage sun gear, they are all meshed with a third-stage outer ring gear arranged on the inner wall of the torque increasing cavity. The third-stage outer ring gear is concentric and coaxial with the third-stage sun gear.

[0010] Specifically, there are three sets of the first-stage planetary gear sets. Each set of the first-stage planetary gear sets includes two meshing first-stage planetary gears. The first-stage planetary gear closer to the first-stage sun gear meshes with the first-stage sun gear, and the other first-stage planetary gear meshes with the first-stage outer ring gear; There are three sets of the second-stage planetary gear sets. Each set of the second-stage planetary gear sets includes a second-stage planetary gear. The second-stage planetary gear meshes with the second-stage sun gear on the side closer to the second-stage sun gear, and the second-stage sun gear meshes with the second-stage outer ring gear on the side closer to the second-stage outer ring gear; There are three sets of the third-stage planetary gear sets. Each set of the third-stage planetary gear sets includes two meshing third-stage planetary gears. The third-stage planetary gear closer to the third-stage sun gear meshes with the third-stage sun gear, and the other third-stage planetary gear meshes with the third-stage outer ring gear.

[0011] More specifically, at the middle position on the side of the third-stage planet carrier closer to the output end, an outer rod of the output sleeve rod is coaxially fixed concentrically. A polygonal sliding groove with a polygonal cross-section is provided coaxially inside the outer rod. A polygonal inner rod that fits the polygonal sliding groove is slidably installed in the polygonal sliding groove. A compression screw is threadedly installed on the outer rod to form a compression fit with the polygonal inner rod. The end of the polygonal inner rod is detachably provided with an output connector.

[0012] In detail, the output connector includes a fixing seat. The fixing seat forms a fixed fit with the end of the polygonal inner rod through a number of fasteners. An output tenon is provided at the middle position on the side of the fixing seat away from the end of the polygonal inner rod.

[0013] More detailedly, the side edge of the torque-increasing housing at the middle position of the vertical plane is vertically cut into two half-housings. A rotating ring is rotatably installed on the outer rod through bearing limit. After the bottoms of the half-housings are assembled, they are fixedly installed on the rotating ring through a number of fasteners. An annular limiting groove concentric and coaxial with the input connector is provided at the top of the half-housing. An annular fixing block is coaxially embedded in the limiting groove. The annular fixing block forms a hidden threaded fit with the corresponding position of the limiting groove through a number of hidden screws. And the top of the annular fixing block is flush with the top of the input connector, and the bottom of the annular fixing block forms a limiting fit with the edge of the boss at the top of the input connector; A clamping block is provided on the input connector on the side closer to the first-stage sun gear. A clamping groove corresponding to the clamping block is provided at the corresponding position on the first-stage sun gear. When the input connector is embedded in the first-stage sun gear, the clamping block and the clamping groove form a clamping connection correspondingly, and the input connector is limited in the first-stage sun gear through the annular fixing block; An input tenon groove is provided coaxially on the side where the input connector exposes from the torque-increasing housing.

[0014] A method of using a socket extension rod that can increase torque. Use the above-mentioned socket extension rod that can increase torque to disassemble the component to be disassembled. When increasing torque, the torque brought to the torque-increasing housing is offset by the cooperation of its own torque-increasing components. The method includes the following steps: S1. Install the input joint: Remove the annular fixing block to expose the clamping groove of the first-stage sun gear. Select the input joint according to the construction situation, clamp the clamping block with the clamping groove and install it completely, and then install the annular fixing block in the limiting groove through the hidden screw; S2. Install the output joint: Select the output joint according to the construction situation, and install the fixing seat at the end of the polygonal inner rod through the fastening seat; S3. Confirm the length of the output sleeve rod: Adjust the polygonal inner rod to the set position in the outer rod, and lock the polygonal inner rod by tightening the pressing screw; S4. Connect the output joint: Connect the output tenon of the output joint with the disassembly groove or disassembly hole of the component to be disassembled to form synchronous rotation; S5. Rotate the input joint to increase torque: Insert the tool into the input tenon groove of the input joint and rotate it, and the tool drives the input joint to rotate in the same direction; The rotation of the input joint drives the first-stage sun gear of the first-stage torque-increasing component to rotate synchronously. The first-stage sun gear drives the first-stage planetary gear set to rotate synchronously. The outermost first-stage planetary gear of the first-stage planetary gear set walks along the first-stage outer ring gear to drive the first-stage planet carrier to rotate synchronously around the first-stage sun gear. The rotation direction of the first-stage planet carrier is opposite to the rotation direction of the input joint, and the torque received by the first-stage outer ring gear is T1; The rotation of the first-stage planet carrier drives the second-stage sun gear of the second-stage torque-increasing component to rotate synchronously. The second-stage sun gear drives the second-stage planetary gear set to rotate synchronously. The outermost second-stage planetary gear of the second-stage planetary gear set walks along the second-stage outer ring gear to drive the second-stage planet carrier to rotate synchronously around the second-stage sun gear. The rotation direction of the second-stage planet carrier is the same as the rotation direction of the first-stage planet carrier, and the torque received by the second-stage outer ring gear is T2; The rotation of the second-stage planet carrier drives the third-stage sun gear of the third-stage torque-increasing component to rotate synchronously. The third-stage sun gear drives the third-stage planetary gear set to rotate synchronously. The outermost third-stage planetary gear of the third-stage planetary gear set walks along the third-stage outer ring gear to drive the third-stage planet carrier to rotate synchronously around the third-stage sun gear. The rotation direction of the third-stage planet carrier is opposite to the rotation direction of the second-stage planet carrier, and the torque received by the third-stage outer ring gear is T3, and T1 + T2 + T3 = 0, and the torque received by the torque-increasing housing is offset after superposition; The rotation of the third-stage planet carrier drives the output sleeve rod to rotate synchronously, and the rotation of the output sleeve rod drives the output joint to rotate synchronously.

[0015] Advantages of the present invention: 1. By having the respective acting forces of the self-torque increasing components cancel each other out, the purpose of canceling the reaction force on the torque increasing housing is achieved, maintaining the stability of the torque increasing housing. At the same time, it ensures the transmission of torque to increase the torque, simplifies the structure, reduces costs, and increases stability. 2. The length of the output sleeve rod is adjustable, and both the input and output connectors are detachable. The input connector, output connector, and the length of the output sleeve rod can be changed according to the operation requirements, improving the applicability. 3. The entire device can be disassembled, facilitating maintenance and adjustment. Each component can be disassembled to meet the operation requirements. Description of the Drawings

[0016] Figure 1 It is a schematic top view of the present invention; Figure 2 It is a schematic bottom view of the present invention; Figure 3 It is an enlarged schematic view at the torque increasing housing of the present invention; Figure 4 It is a disassembling schematic view of the annular fixing block of the present invention; Figure 5 It is an installation schematic view of the torque increasing component of the present invention; Figure 6 It is a disassembling schematic view of the input connector and the first-stage sun gear of the present invention; Figure 7 It is a schematic view of the clamping block at the bottom of the input connector of the present invention; Figure 8 It is an installation schematic view of the first-stage planet carrier of the present invention; Figure 9 It is an installation schematic view of the second-stage torque increasing component of the present invention; Figure 10 It is an installation schematic view of the second-stage planet carrier of the present invention; Figure 11 It is an installation schematic view of the third-stage torque increasing component of the present invention; Figure 12 It is an installation schematic view of the third-stage planet carrier of the present invention; Figure 13 It is a sectional schematic view of the torque increasing housing of the present invention; Figure 14 It is an action schematic view of the first-stage torque increasing component of the present invention; Figure 15 It is an action schematic view of the second-stage torque increasing component of the present invention; Figure 16 It is an action schematic view of the third-stage torque increasing component of the present invention; In the figure: 1. Input connector; 101. Boss; 102. Input mortise; 103. Clamping block; 2. Torque-increasing housing; 201. Half housing; 202. Limiting groove; 203. Torque-increasing cavity; 3. Ring-shaped fixing block; 301. Hidden screw; 4. First-stage torque-increasing assembly; 401. First-stage sun gear; 402. Clamping groove; 403. First-stage planetary gear set; 404. First-stage outer ring gear; 405. First-stage planet carrier; 5. Second-stage torque-increasing assembly; 501. Second-stage sun gear; 502. Second-stage planetary gear set; 503. Second-stage outer ring gear; 504. Second-stage planet carrier; 6. Third-stage torque-increasing assembly; 601. Third-stage sun gear; 602. Third-stage planetary gear set; 603. Third-stage outer ring gear; 604. Third-stage planet carrier; 7. Output sleeve rod; 701. Outer rod; 702. Polygonal sliding groove; 703. Polygonal inner rod; 704. Compression screw; 705. Rotating ring; 8. Output joint; 801. Output tenon; 802. Fixed seat; 9. External fixing ring; 10. Anti-slip pattern. Specific implementation mode

[0017] As follows, the embodiments will be further described with reference to the accompanying drawings.

[0018] As Figures 1 to 16 shown, as a preferred Embodiment 1, a socket extension rod capable of increasing torque includes a torque-increasing housing 2. The torque-increasing housing 2 is assembled by two half housings 201 and has a hollow torque-increasing cavity 203 inside. A number of torque-increasing assemblies are provided inside the torque-increasing housing 2. Each torque-increasing assembly forms a transmission cooperation with the torque-increasing housing 2, and the torques of all torque-increasing assemblies are superimposed and offset after being applied to the torque-increasing housing 2; An input joint 1 is detachably installed inside the torque-increasing assembly near the input end. The input joint 1 protrudes from one end of the torque-increasing housing 2 and forms a transmission with the corresponding torque-increasing assembly; A telescopic output sleeve rod 7 is provided on the torque-increasing assembly near the output end. The end of the output sleeve rod 7 penetrates through the torque-increasing housing 2 and is detachably provided with an output joint 8. The output joint 8 forms a transmission with the torque-increasing assembly through the output sleeve rod 7.

[0019] As a preferred Embodiment 2, there are at least three groups of the torque-increasing assemblies, which are the first-stage torque-increasing assembly 4, the second-stage torque-increasing assembly 5, and the third-stage torque-increasing assembly 6 from the input end to the output end. The torque applied by the first-stage torque-increasing assembly 4 to the torque-increasing housing 2 is T1, the torque applied by the second-stage torque-increasing assembly 5 to the torque-increasing housing 2 is T2, and the torque applied by the third-stage torque-increasing assembly 6 to the torque-increasing housing 2 is T3, and T1 + T2 + T3 = 0.

[0020] The first-stage torque increasing component 4 includes a first-stage planet carrier 405. At the middle position on the side of the first-stage planet carrier 405 close to the input end, a first-stage sun gear 401 is rotatably provided coaxially. On the side of the first-stage sun gear 401 close to the input end, it is coaxially clamped and installed with the input joint 1 to form synchronous rotation. On the side of the first-stage planet carrier 405 close to the input end, a number of first-stage planet gear sets 403 are rotatably installed at equal intervals around the first-stage sun gear 401. On the side of the first-stage planet gear sets 403 close to the first-stage sun gear 401, they are all meshed with the first-stage sun gear 401. On the side of the first-stage planet gear sets 403 away from the first-stage sun gear 401, they are all meshed with a first-stage outer ring gear 404 arranged on the inner wall of the torque increasing cavity 203. The first-stage outer ring gear 404 is coaxially arranged with the first-stage sun gear 401.

[0021] The second-stage torque increasing component 5 includes a second-stage planet carrier 504. At the middle position on the side of the second-stage planet carrier 504 close to the first-stage torque increasing component 4, a second-stage sun gear 501 is rotatably provided coaxially. The second-stage sun gear 501 is coaxially arranged with the first-stage planet carrier 405, and on the side of the second-stage sun gear 501 close to the first-stage planet carrier 405, it is fixedly fitted with the first-stage planet carrier 405 through a connecting block. On the side of the second-stage planet carrier 504 close to the first-stage torque increasing component 4, a number of second-stage planet gear sets 502 are rotatably installed at equal intervals around the second-stage sun gear 501. On the side of the second-stage planet gear sets 502 close to the second-stage sun gear 501, they are all meshed with the second-stage sun gear 501. On the side of the second-stage planet gear sets 502 away from the second-stage sun gear 501, they are all meshed with a second-stage outer ring gear 503 arranged on the inner wall of the torque increasing cavity 203. The second-stage outer ring gear 503 is coaxially arranged with the second-stage sun gear 501.

[0022] The third-stage torque increasing component 6 includes a third-stage planet carrier 604. At the middle position on the side of the third-stage planet carrier 604 close to the second-stage torque increasing component 5, a third-stage sun gear 601 is rotatably provided coaxially. The third-stage sun gear 601 is coaxially arranged with the second-stage planet carrier 504, and on the side of the third-stage sun gear 601 close to the second-stage planet carrier 504, it is fixedly fitted with the second-stage planet carrier 504 through a connecting block. On the side of the third-stage planet carrier 604 close to the second-stage torque increasing component 5, a number of third-stage planet gear sets 602 are rotatably installed at equal intervals around the third-stage sun gear 601. On the side of the third-stage planet gear sets 602 close to the third-stage sun gear 601, they are all meshed with the third-stage sun gear 601. On the side of the third-stage planet gear sets 602 away from the third-stage sun gear 601, they are all meshed with a third-stage outer ring gear 603 arranged on the inner wall of the torque increasing cavity 203. The third-stage outer ring gear 603 is coaxially arranged with the third-stage sun gear 601.

[0023] There are three sets of the first - stage planetary gear sets 403. Each set of the first - stage planetary gear sets 403 includes two meshing first - stage planetary gears. The first - stage planetary gear closer to the first - stage sun gear 401 meshes with the first - stage sun gear 401, and the other first - stage planetary gear meshes with the first - stage outer ring gear 404; There are three sets of the second - stage planetary gear sets 502. Each set of the second - stage planetary gear sets 502 includes a second - stage planetary gear. The second - stage planetary gear meshes with the second - stage sun gear 501 on the side closer to the second - stage sun gear 501, and the second - stage sun gear 501 meshes with the second - stage outer ring gear 503 on the side closer to the second - stage outer ring gear 503; There are three sets of the third - stage planetary gear sets 603. Each set of the third - stage planetary gear sets 603 includes two meshing third - stage planetary gears. The third - stage planetary gear closer to the third - stage sun gear 601 meshes with the third - stage sun gear 601, and the other third - stage planetary gear meshes with the third - stage outer ring gear 604.

[0024] When the first - stage sun gear 401 rotates, it transmits torque to the two first - stage planetary gears and the first - stage outer ring gear 404 in the first - stage planetary gear set 403. The first - stage outer ring gear 404 is fixed and cannot rotate, forcing the first - stage planet carrier 405 to rotate, and transmitting the torque to the second - stage sun gear 501. The second - stage sun gear 501 transmits the torque to a second - stage planetary gear and the second - stage outer ring gear 503 in the second - stage planetary gear set 502. The second - stage outer ring gear 503 is fixed and cannot rotate, forcing the second - stage planet carrier 504 to rotate, and transmitting the torque to the third - stage sun gear 601, the two third - stage planetary gears in the third - stage planetary gear set 602, and the third - stage outer ring gear 603. The third - stage outer ring gear 603 is fixed and cannot rotate, forcing the third - stage planet carrier 604 to rotate, thereby transmitting the torque to the output sleeve rod 7.

[0025] As a more preferred Embodiment 3, a more detailed embodiment is provided based on Embodiment 2, and its parameter configuration is shown in Table 1: Table 1 Parameters of the torque - increasing component

[0026] As Figure 14 shown, the first - stage outer ring gear 404 cannot rotate: the first - stage sun gear 401 rotates clockwise along T1 - 1. The number of teeth of both the first - stage sun gear 401 and the first - stage planetary gear is 20, and the number of teeth of the first - stage outer ring gear 404 is 100. The first - stage planetary gears rotate counter - clockwise along T1 - 2 and clockwise along T1 - 3 respectively. That is, the transmission ratio between the first - stage sun gear 401 and the first - stage planet carrier 405 is 5. The first - stage planet carrier 405 rotates counter - clockwise along T1 - 4 and the torque is increased by 5 times. The force T1 on the first - stage outer ring gear 404 is clockwise; As Figure 15As shown, the secondary outer ring gear 503 cannot rotate. The secondary sun gear 501 and the first-stage planet carrier 405 rotate counterclockwise synchronously along T2-1. The secondary planet gear set 502 has only one set of secondary planet gears, and the secondary planet gears rotate clockwise along T2-2. The number of teeth of the secondary sun gear 501 is 50, the number of teeth of the secondary planet gears is 25, and the number of teeth of the secondary outer ring gear 503 is 100. That is, the transmission ratio between the secondary sun gear 501 and the secondary planet carrier 504 is 2. The secondary planet carrier 504 rotates counterclockwise along T2-3, and the torque is doubled. The force on the secondary outer ring gear 503, T2, is clockwise; As Figure 16 shown, the tertiary outer ring gear 603 cannot rotate. The tertiary sun gear 601 and the secondary planet carrier 504 rotate counterclockwise synchronously along T3-1. The number of teeth of the tertiary sun gear 501 is 100, the number of teeth of the two tertiary planet gears in the tertiary planet gear set 602 is 20 each, and the number of teeth of the tertiary outer ring gear 603 is 150. That is, the transmission ratio between the tertiary sun gear 601 and the tertiary planet carrier 604 is 8. The tertiary planet carrier 604 rotates clockwise along T3-4, and the torque is increased by 1.5 times. The force on the tertiary outer ring gear 603, T3, is counterclockwise; It can be concluded that: the rotation directions of the first-stage sun gear 401 and the tertiary planet carrier 604 are the same, and the overall transmission ratio is 15; the force directions of the first-stage outer ring gear 404, the secondary outer ring gear 503, and the tertiary outer ring gear 603 are exactly opposite, so the acting forces can be offset.

[0027] Output component: When the tertiary planet carrier 604 rotates, the torque is transmitted to the output sleeve rod 7. When the output sleeve rod 7 rotates, the torque is transmitted to the polygonal inner rod 703. The rotation of the polygonal inner rod 703 directly transmits the torque to the output joint 8.

[0028] In summary: The overall transmission ratio is 15. When a clockwise torque of 100 N*m is input to the input joint 1, the polygonal inner rod 703 outputs a clockwise torque of 1500 N*m, increasing the torque in the same direction by 1400 N*m. Among them: the clockwise torque T1 on the first-stage outer ring gear 404 is 500 N*m, the clockwise torque T2 on the secondary outer ring gear 503 is 1000 N*m, the counterclockwise torque T3 on the tertiary outer ring gear 603 is 1500 N*m, and T1 + T2 = -T3, that is, the torque on the torque-increasing housing 2 is offset.

[0029] Similarly, when a counterclockwise torque of 100 N*m is input to the input joint 1, the polygonal inner rod 703 outputs a counterclockwise torque of 1500 N*m, increasing the torque in the same direction by 1400 N*m.

[0030] Preferably, at the corresponding rotational positions of the first-stage planet carrier 405, the second-stage planet carrier 504, and the third-stage planet carrier 604 and each gear, there are corresponding pin columns one by one. Each gear forms a rotation with upper and lower limits on the corresponding pin column, preventing the gear from disengaging from the pin column. Alternatively, by restricting the distance between the top of the pin column and the upper plane, the gear can be prevented from disengaging.

[0031] As a preferred embodiment 4, at the middle position on the side of the third-stage planet carrier 604 close to the output end, an outer rod 701 of the output sleeve rod 7 is coaxially fixed. Inside the outer rod 701, a polygon sliding groove 702 with a polygonal cross-section is coaxially arranged. A polygonal inner rod 703 that fits the polygon sliding groove 702 is slidably installed in the polygon sliding groove 702. A compression screw 704 is threadedly installed on the outer rod 701 to form a compression fit with the polygonal inner rod 703. The end of the polygonal inner rod 703 is detachably provided with an output connector 8.

[0032] The design of the sleeve rod enables the length of the device to be adjustable during use. After adjusting the length, the sleeve rod is fastened by the compression screw 704. The polygon sliding groove 702 and the polygonal inner rod 703 ensure axial sliding. At the same time, when the outer rod 701 rotates, it can drive the polygonal inner rod 703 to rotate synchronously without relative displacement in the tangential direction.

[0033] Preferably, the polygon sliding groove 702 can use a regular quadrilateral. At this time, the polygonal inner rod 703 is selected as a square rod with a regular quadrilateral cross-section.

[0034] As a more preferred embodiment 5, a layer of buffer cushion layer is provided in the polygon sliding groove 702, which can be made of rubber material. The polygonal inner rod 703 can form a damping sliding with the polygon sliding groove 702 through the buffer cushion layer, reducing the sensitivity of the sliding, facilitating adjustment and use, and further ensuring the rotational stability and avoiding relative displacement.

[0035] As a preferred embodiment 6, the output connector 8 includes a fixed seat 802. The fixed seat 802 forms a fixed fit with the end of the polygonal inner rod 703 through a number of fasteners. At the middle position on the side of the fixed seat 802 away from the end of the polygonal inner rod 703, an output tenon 801 is provided.

[0036] The fasteners can use second hidden screws. The fixed seat 802 forms a hidden thread fixation with the end of the polygonal inner rod 703 through the fasteners. The second hidden screws are equally spaced around the central axis of the fixed seat 802. The output tenon 801 is used to form a linkage with the disassembly component after docking with the disassembly component.

[0037] As a preferred embodiment 7, the torque increasing housing 2 is vertically cut into two half-housings 201 along the vertical plane at the middle position on the side. A rotating ring 705 is rotatably installed on the outer rod 701 through a bearing. After the bottoms of the half-housings 201 are assembled, they are fixedly installed on the rotating ring 705 through a plurality of fasteners. A ring-shaped limiting groove 202 concentric and coaxial with the input joint 1 is provided at the top of the half-housing 201. A ring-shaped fixing block 3 is coaxially embedded in the limiting groove 202. The ring-shaped fixing block 3 forms a hidden thread fit with the corresponding position of the limiting groove 202 through a plurality of hidden screws 301. The top of the ring-shaped fixing block 3 is flush with the top of the input joint 1, and the bottom of the ring-shaped fixing block 3 forms a limiting fit with the edge of the boss 101 at the top of the input joint 1; A clamping block 103 is provided on the input joint 1 near one side of the first-stage sun gear 401. A clamping groove 402 corresponding to the clamping block 103 is provided at the corresponding position on the first-stage sun gear 401. When the input joint 1 is embedded in the first-stage sun gear 401, the clamping block 103 and the clamping groove 402 form a clamping connection, and the input joint 1 is limited in the first-stage sun gear 401 through the ring-shaped fixing block 3; An input tenon groove 102 is coaxially provided on the side where the input joint 1 exposes from the torque increasing housing 2.

[0038] The torque increasing housing 2 is made into half-housings 201 that open left and right, which is convenient for disassembly and installation. During installation, the bottom is installed on the rotating ring 705 through fasteners. The rotating ring 705 forms a limiting rotation with the outer rod 701. The rotating ring 705 forms a rotational fit with the outer rod 701 at a set position on the outer rod 701 through a bearing. On the one hand, it ensures the installation position of the torque increasing housing 2, and at the same time ensures the rotational relationship between the torque increasing housing 2 and the outer rod 701. The bottoms of the half-housings 201 are all fixed on the rotating ring 705 to complete the splicing and fastening. The tops of the half-housings 201 are spliced and fastened through the ring-shaped fixing block 3 and a plurality of hidden screws 301 after installing the input joint 1, so as to complete the assembly of the entire torque increasing housing. The remaining gaps can be further ensured to be closed through bonding; The arrangement of the clamping block 103 and the clamping groove 402 facilitates the clamping installation of the input joint 1 and ensures the synchronous rotation of the input joint 1 and the first-stage sun gear 401 after installation. One side of the input joint 1 is a cylindrical head with an input tenon groove 102 arranged, and the other side is a rotating column with a clamping block 103. The rotating column is concentric and coaxial with the cylindrical head. The clamping blocks 103 are arranged at equal intervals around the rotating column. The installation position of the input tenon groove 102 on the cylindrical head is the boss 101. The outside of the boss 101 forms a depression with the cylindrical head. When the ring-shaped fixing block 3 is just located in the limiting groove 202, the ring-shaped fixing block 3 is also located above the depression to form a limit on the input joint 1 to prevent the input joint 1 from falling out and does not affect the rotation of the input joint 1. The input tenon groove 102 is used for docking with a rotating tool, which can be manually rotated by a person or a mechanical rotating device.

[0039] Preferably, the input tenon groove 102 can be made into a square tenon groove, and the output tenon head 801 can be made into a square tenon head, which can be replaced according to the actual situation. Holes corresponding to bolts can also be provided on the output tenon head 801 for butt joint with bolts.

[0040] As a more preferred Embodiment 8, the torque-increasing housing 2 can also be vertically cut into two half-housings 201 from top to bottom. The two upper and lower half-housings 201 can be installed through threaded ports or snap joints to form a complete torque-increasing housing 2.

[0041] As a preferred Embodiment 9, an external fixing ring 9 is provided on one side of the outer side of the torque-increasing housing 2 to facilitate exerting force on the device during use.

[0042] As a preferred Embodiment 10, a circle of anti-slip patterns 10 is provided on the outer side wall of the torque-increasing housing 2 to prevent slipping and facilitate gripping and use.

[0043] As a preferred Embodiment 11, a method of using a torque-increasing socket extension rod is as follows: use the above-mentioned torque-increasing socket extension rod to disassemble the component to be disassembled, and when increasing the torque, the torque brought to the torque-increasing housing 2 is offset by the cooperation of its own torque-increasing components, including the following steps: S1. Install the input joint 1: Remove the annular fixing block 3 to expose the clamping groove 402 of the first-stage sun gear 401. Select the input joint 1 according to the construction situation, clamp the clamping block 103 with the clamping groove 402 and install it completely, and then install the annular fixing block 3 in the limiting groove 202 through the hidden screw 301; S2. Install the output joint 8: Select the output joint 8 according to the construction situation, and install the fixed seat 802 at the end of the polygonal inner rod 703 through the fastening seat; S3. Confirm the length of the output sleeve rod 7: Adjust the polygonal inner rod 703 in the outer rod 701 to the set position, and lock the polygonal inner rod 703 by tightening the pressing screw 704; S4. Dock the output joint 8: Dock the output tenon head 801 of the output joint 8 with the disassembly groove or disassembly hole of the component to be disassembled to form synchronous rotation; S5. Rotate the input joint 1 to increase the torque: Insert the tool into the input tenon groove 102 of the input joint 1 and rotate it, and the tool drives the input joint 1 to rotate in the same direction; The rotation of the input joint 1 drives the first-stage sun gear 401 of the first-stage torque-increasing assembly 4 to rotate synchronously. The first-stage sun gear 401 drives the first-stage planetary gear set 403 to rotate synchronously. The outermost first-stage planetary gear of the first-stage planetary gear set 403 travels along the first-stage outer ring gear 404, driving the first-stage planet carrier 405 to rotate synchronously around the first-stage sun gear 401. The rotation direction of the first-stage planet carrier 405 is opposite to that of the input joint 1, and the torque received by the first-stage outer ring gear 404 is T1; The rotation of the first-stage planet carrier 405 drives the second-stage sun gear 501 of the second-stage torque-increasing assembly 5 to rotate synchronously. The second-stage sun gear 501 drives the second-stage planetary gear set 502 to rotate synchronously. The outermost second-stage planetary gear of the second-stage planetary gear set 502 travels along the second-stage outer ring gear 503, driving the second-stage planet carrier 504 to rotate synchronously around the second-stage sun gear 501. The rotation direction of the second-stage planet carrier 504 is the same as that of the first-stage planet carrier 405, and the torque received by the second-stage outer ring gear 503 is T2; The rotation of the second-stage planet carrier 504 drives the third-stage sun gear 601 of the third-stage torque-increasing assembly 5 to rotate synchronously. The third-stage sun gear 601 drives the third-stage planetary gear set 602 to rotate synchronously. The outermost third-stage planetary gear of the third-stage planetary gear set 602 travels along the third-stage outer ring gear 603, driving the third-stage planet carrier 604 to rotate synchronously around the third-stage sun gear 601. The rotation direction of the third-stage planet carrier 604 is opposite to that of the second-stage planet carrier 504, and the torque received by the third-stage outer ring gear 603 is T3, and T1 + T2 + T3 = 0, and the torques received by the torque-increasing housing 2 cancel each other out after superposition; The rotation of the third-stage planet carrier 604 drives the output sleeve rod 7 to rotate synchronously. The rotation of the output sleeve rod 7 drives the output joint 8 to rotate synchronously.

Claims

1. A socket extension rod capable of increasing torque, characterized in that, It includes a torque-increasing housing (2), which is assembled by two half-housings (201) and has a hollow torque-increasing cavity (203) inside. A number of torque-increasing components are provided inside the torque-increasing housing (2), and each torque-increasing component forms a transmission fit with the torque-increasing housing (2), and the torques of all torque-increasing components are superimposed and offset after acting on the torque-increasing housing (2). An input joint (1) is detachably installed inside the torque-increasing component near the input end side. The input joint (1) exposes from one end of the torque-increasing housing (2) and forms a transmission with the corresponding torque-increasing component. A telescopic output sleeve rod (7) is provided on the torque-increasing component near the output end side. The end of the output sleeve rod (7) penetrates through the torque-increasing housing (2) and is detachably provided with an output joint (8). The output joint (8) forms a transmission with the torque-increasing component through the output sleeve rod (7).

2. The sleeve extension rod capable of increasing torque according to claim 1, characterized in that There are at least three groups of the torque-increasing components, which are a first-level torque-increasing component (4), a second-level torque-increasing component (5) and a third-level torque-increasing component (6) from the input end to the output end. The torque applied by the first-level torque-increasing component (4) to the torque-increasing housing (2) is T1, the torque applied by the second-level torque-increasing component (5) to the torque-increasing housing (2) is T2, and the torque applied by the third-level torque-increasing component (6) to the torque-increasing housing (2) is T3, and T1 + T2 + T3 = 0.

3. The socket extension rod capable of increasing torque according to claim 2, wherein The first-level torque-increasing component (4) includes a first-level planet carrier (405). A first-level sun gear (401) is rotatably provided coaxially at the middle position near the input end side of the first-level planet carrier (405). The first-level sun gear (401) is coaxially clamped and installed with the input joint (1) near the input end side to form synchronous rotation. A number of first-level planet gear sets (403) are rotatably installed at equal intervals around the first-level sun gear (401) near the input end side of the first-level planet carrier (405). The first-level planet gear sets (403) are all meshed with the first-level sun gear (401) on the side close to the first-level sun gear (401). The first-level planet gear sets (403) are all meshed with a first-level outer ring gear (404) arranged on the inner wall of the torque-increasing cavity (203) on the side far from the first-level sun gear (401). The first-level outer ring gear (404) is concentric and coaxial with the first-level sun gear (401).

4. The sleeve extension rod capable of increasing torque according to claim 3, characterized in that, The secondary torque increasing assembly (5) includes a secondary planet carrier (504). At the middle position on the side of the secondary planet carrier (504) close to the primary torque increasing assembly (4), a secondary sun gear (501) is rotatably provided coaxially. The secondary sun gear (501) is concentric and coaxial with the primary planet carrier (405). And on the side of the secondary sun gear (501) close to the primary planet carrier (405), it is fixedly fitted with the primary planet carrier (405) through a connecting block. On the side of the secondary planet carrier (504) close to the primary torque increasing assembly (4), a number of secondary planet gear sets (502) are rotatably installed at equal intervals around the secondary sun gear (501). On the side of the secondary planet gear sets (502) close to the secondary sun gear (501), they are all meshed with the secondary sun gear (501). On the side of the secondary planet gear sets (502) away from the secondary sun gear (501), they are all meshed with a secondary outer ring gear (503) arranged on the inner wall of the torque increasing cavity (203). The secondary outer ring gear (503) is concentric and coaxial with the secondary sun gear (501).

5. A socket extension rod capable of increasing torque according to claim 4, characterized in that, The tertiary torque increasing assembly (6) includes a tertiary planet carrier (604). At the middle position on the side of the tertiary planet carrier (604) close to the secondary torque increasing assembly (5), a tertiary sun gear (601) is rotatably provided coaxially. The tertiary sun gear (601) is concentric and coaxial with the secondary planet carrier (504). And on the side of the tertiary sun gear (601) close to the secondary planet carrier (504), it is fixedly fitted with the secondary planet carrier (504) through a connecting block. On the side of the tertiary planet carrier (604) close to the secondary torque increasing assembly (5), a number of tertiary planet gear sets (602) are rotatably installed at equal intervals around the tertiary sun gear (601). On the side of the tertiary planet gear sets (602) close to the tertiary sun gear (601), they are all meshed with the tertiary sun gear (601). On the side of the tertiary planet gear sets (602) away from the tertiary sun gear (601), they are all meshed with a tertiary outer ring gear (603) arranged on the inner wall of the torque increasing cavity (203). The tertiary outer ring gear (603) is concentric and coaxial with the tertiary sun gear (601).

6. The sleeve extension rod capable of increasing torque according to claim 5, wherein, There are three sets of the primary planet gear sets (403). Each set of the primary planet gear sets (403) includes two meshing primary planet gears. The primary planet gear on the side close to the primary sun gear (401) is meshed with the primary sun gear (401), and the other primary planet gear is meshed with the primary outer ring gear (404). There are three sets of the secondary planet gear sets (502). Each set of the secondary planet gear sets (502) includes a secondary planet gear. The secondary planet gear on the side close to the secondary sun gear (501) is meshed with the secondary sun gear (501), and the secondary sun gear (501) on the side close to the secondary outer ring gear (503) is meshed with the secondary outer ring gear (503). There are three sets of the third-stage planetary gear sets (603). Each set of the third-stage planetary gear sets (603) includes two meshing third-stage planetary gears. The third-stage planetary gear on the side close to the third-stage sun gear (601) meshes with the third-stage sun gear (601), and the other third-stage planetary gear meshes with the third-stage outer ring gear (604).

7. The sleeve extension rod capable of increasing torque according to claim 6, characterized in that, At the middle position on the side of the third-stage planet carrier (604) close to the output end, the outer rod (701) of the output sleeve rod (7) is fixedly installed concentrically and coaxially. Inside the outer rod (701), a polygonal sliding groove (702) with a polygonal cross-section is provided concentrically and coaxially. A polygonal inner rod (703) that fits the polygonal sliding groove (702) is slidably installed in the polygonal sliding groove (702). A compression screw (704) is threadedly installed on the outer rod (701) to form a compression fit with the polygonal inner rod (703). The end of the polygonal inner rod (703) is detachably provided with an output connector (8).

8. A socket extension rod capable of increasing torque according to claim 7, characterized in that, The output connector (8) includes a fixing seat (802). The fixing seat (802) forms a fixed fit with the end of the polygonal inner rod (703) through a number of fasteners. At the middle position on the side of the fixing seat (802) away from the end of the polygonal inner rod (703), an output tenon (801) is provided.

9. The sleeve extension rod capable of increasing torque according to claim 8, characterized in that, The side edge of the torque-increasing housing (2) is vertically cut into two half-housings (201) along the vertical plane at the middle position. A rotating ring (705) is rotatably installed on the outer rod (701) by bearing limit. After the bottoms of the half-housings (201) are assembled, they are fixedly installed on the rotating ring (705) through a number of fasteners. At the top of the half-housing (201), an annular limiting groove (202) concentric and coaxial with the input connector (1) is provided. An annular fixing block (3) is coaxially embedded in the limiting groove (202). The annular fixing block (3) forms a hidden thread fit with the corresponding position of the limiting groove (202) through a number of hidden screws (301). The top of the annular fixing block (3) is flush with the top of the input connector (1), and the bottom of the annular fixing block (3) forms a limiting fit with the edge of the boss (101) at the top of the input connector (1). A clamping block (103) is provided on the input connector (1) on the side close to the first-stage sun gear (401). At the corresponding position on the first-stage sun gear (401), a clamping groove (402) corresponding to the clamping block (103) is provided. When the input connector (1) is embedded in the first-stage sun gear (401), the clamping block (103) and the clamping groove (402) correspond to form a clamping connection, and the input connector (1) is limited in the first-stage sun gear (401) through the annular fixing block (3). On the side where the input connector (1) exposes from the torque-increasing housing (2), an input tenon groove (102) is provided concentrically and coaxially.

10. A method of using a socket extension rod capable of increasing torque, characterized in that, Using a torque-increasing sleeve rod as described in claim 9 to disassemble the component to be disassembled, when increasing the torque, the torque brought to the torque-increasing housing (2) is offset by the cooperation of its own torque-increasing components, including the following steps: S1. Install the input joint (1): Remove the annular fixing block (3) to expose the clamping groove (402) of the first-stage sun gear (401). Select the input joint (1) according to the construction situation, clamp the clamping block (103) with the clamping groove (402) and complete the installation. Then install the annular fixing block (3) in the limiting groove (202) through the hidden screw (301). S2. Install the output joint (8): Select the output joint (8) according to the construction situation, and install the fixing seat (802) at the end of the polygonal inner rod (703) through the fastening seat. S3. Confirm the length of the output sleeve rod (7): Adjust the polygonal inner rod (703) in the outer rod (701) to the set position, and lock the polygonal inner rod (703) by tightening the compression screw (704). S4. Connect the output joint (8): Connect the output tenon (801) of the output joint (8) with the disassembly groove or disassembly hole of the component to be disassembled to form synchronous rotation. S5. Rotate the input joint (1) to increase torque: Insert the tool into the input tenon groove (102) of the input joint (1) and rotate it. The tool drives the input joint (1) to rotate in the same direction. The rotation of the input joint (1) drives the synchronous rotation of the first-stage sun gear (401) of the first-stage torque-increasing assembly (4). The first-stage sun gear (401) drives the synchronous rotation of the first-stage planetary gear set (403). The outermost first-stage planetary gear of the first-stage planetary gear set (403) walks along the first-stage outer gear ring (404) to drive the first-stage planetary carrier (405) to rotate synchronously around the first-stage sun gear (401). The rotation direction of the first-stage planetary carrier (405) is opposite to that of the input joint (1), and the torque received by the first-stage outer gear ring (404) is T1. The rotation of the first-stage planetary carrier (405) drives the synchronous rotation of the second-stage sun gear (501) of the second-stage torque-increasing assembly (5). The second-stage sun gear (501) drives the synchronous rotation of the second-stage planetary gear set (502). The outermost second-stage planetary gear of the second-stage planetary gear set (502) walks along the second-stage outer gear ring (503) to drive the second-stage planetary carrier (504) to rotate synchronously around the second-stage sun gear (501). The rotation direction of the second-stage planetary carrier (504) is the same as that of the first-stage planetary carrier (405), and the torque received by the second-stage outer gear ring (503) is T2. The rotation of the second-stage planetary carrier (504) drives the synchronous rotation of the third-stage sun gear (601) of the third-stage torque-increasing assembly (5). The third-stage sun gear (601) drives the synchronous rotation of the third-stage planetary gear set (602). The outermost third-stage planetary gear of the third-stage planetary gear set (602) walks along the third-stage outer gear ring (603) to drive the third-stage planetary carrier (604) to rotate synchronously around the third-stage sun gear (601). The rotation direction of the third-stage planetary carrier (604) is opposite to that of the second-stage planetary carrier (504), and the torque received by the third-stage outer gear ring (603) is T3. T1 + T2 + T3 = 0, and the torques received by the torque-increasing housing (2) are superimposed and offset. The rotation of the three-stage planet carrier (604) drives the output sleeve rod (7) to rotate synchronously, and the rotation of the output sleeve rod (7) drives the output joint (8) to rotate synchronously.

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