Low-resistance bolt torque detector

Abstract

The invention relates to the technical field of bolt torque detection, and particularly discloses a low-resistance bolt torque detector which comprises an operation platform of a desktop structure, a power box is fixedly installed on the left side of the upper surface of the operation platform, and a digital display controller is placed above the power box. A rotating shaft used for outputting power is rotationally installed on the right side of the power box, a torque sensor is fixedly installed at the top end of the rotating shaft, and data transmission is conducted between the torque sensor and the digital display controller through a signal transmission line. According to the low-resistance bolt torque detector, a novel structural design is adopted, after a mounting block is mounted in place, a piston plate moves downwards in a pressure groove under the magnetic adsorption action between a first magnetic block and a second magnetic block, so that lubricating oil in the pressure groove is sprayed out from a smearing spray head through a second connecting pipe; therefore, lubricating oil is smeared outside the bolt body, and the torque detection accuracy is prevented from being affected by too large friction force between the bolt body and the locking nut.

Description

Technical Field

[0001] The invention relates to the technical field of bolt torque detection, in particular to a low-resistance bolt torque detector. Background Art

[0002] Bolts are common fasteners in mechanical equipment. Different bolts with different torques are required according to different usage scenarios. Therefore, after the bolts are produced, they need to be tested for torque using a torque detection device for classification, thereby ensuring the safety and reliability of the bolt connection.

[0003] In the prior art, a Chinese patent with publication number CN103411721A discloses a bolt torque detection device, in which a rack slides up and down vertically on a rack seat, a gear rotates around a horizontal line through the support of a gear seat, the gear is coaxially connected to a rotating sleeve, and a tensile testing machine is driven to connect the rack to drive the rack to slide; a head chuck is inserted into a hole of a head support seat to limit the rotation of the head chuck relative to the head support seat around a horizontal line; the rotation of the bolt head relative to the head chuck around a horizontal line is limited; the rotation of the nut chuck relative to the rotating sleeve around a horizontal line and the translation along the horizontal line are limited; the rotation of the nut relative to the nut chuck around a horizontal line is limited; the height of the matching hole of the nut and the bolt head is consistent; a back cap hole is provided on the head support seat, and the end of the back cap extends into the hole of the head support seat to abut against the head chuck and the bolt head of the bolt in the head chuck, limiting the leftward movement of the bolt head along the horizontal line and the rotation around the horizontal line.

[0004] As another example in the prior art, a Chinese patent with publication number CN113108978A discloses an industrial bolt torque testing machine, including a torque testing machine, a sealing mechanism is fixedly connected to the surface of the torque testing machine, an air duct is installed on the surface of the sealing mechanism, a vacuum machine is fixedly connected to one end of the air duct, a mounting frame is fixedly connected to the surface of the torque testing machine, a mounting plate is fixedly connected to the surface of one end of the mounting frame, a mounting mechanism is installed on the surface of the mounting plate, and a thread detection mechanism is installed on the surface of the mounting plate. During the torque test of bolts of the same model, data judgment and storage can be performed on the influence of the curvature, length and distortion value of the bolt surface thread on the bolt torque, and at the same time, the influence of air resistance during the bolt torque test can be reduced, and the bolts can be automatically installed.

[0005] As another example in the prior art, a Chinese patent with publication number CN118730370A discloses a bolt axial force and torque testing machine; it includes a shell, a driving assembly is fixedly connected to the shell through a bracket plate, and a rotating shaft is arranged at the output end of the driving assembly. By arranging a thrust assembly, during the process of screwing the bolt into the screw sleeve, in order to test the influence of the screw sleeve on the axial force and torque under the action of horizontal thrust, the first motor is started to drive the first circular gear to rotate, and the first circular gear drives the first rotating shaft and the second rotating shaft to rotate through the second circular gear. The rotation of the second rotating shaft can make the threaded column disengage from the second rotating shaft, and the threaded column drives the sleeve to move. The movement of the sleeve makes one end of the moving column abut against the inner wall of the column sleeve, thereby driving the moving column to move. The moving column applies horizontal thrust to the screw sleeve through the connecting ball and the connecting block. The second pressure sensor can test the magnitude of the applied horizontal thrust, so as to realize the test of the axial force and torque of the screw sleeve under the action of horizontal thrust during the process of screwing the bolt into the screw sleeve.

[0006] Based on the above materials, it can be seen that in the prior art, the purpose of torque detection is generally achieved by applying rotational force and axial force to the bolt. However, in actual use, some high-tech fields require the use of low-resistance bolts (that is, the force required for locking is smaller). During torque detection, this type of bolt needs to ensure that the friction between it and the nut is small, otherwise it will affect the accuracy of torque detection. Summary of the invention

[0007] The object of the present invention is to provide a low-resistance bolt torque detector to solve the problem in the above-mentioned background technology that large resistance during detection affects detection accuracy.

[0008] To achieve the above object, the present invention provides the following technical solution: a low-resistance bolt torque detector, comprising an operating platform in a desktop structure, a power box is fixedly installed on the left side of the upper surface of the operating platform, and a digital display controller is placed above the power box, and also includes: A rotating shaft for outputting power is rotatably mounted on the right side of the power box, and a torque sensor is fixedly mounted on the top of the rotating shaft, and data is transmitted between the torque sensor and the digital display controller via a signal transmission line; A detection tool is arranged on the right side above the operating platform, a mounting groove is provided inside the detection tool, and a left-right sliding structure is formed between the detection tool and the adjustment slideway below it, and the adjustment slideway is fixedly installed on the upper surface of the operating platform; A square-shaped mounting block is slidably mounted inside the mounting groove, a bolt body to be detected is mounted in a through hole inside the mounting block, and a locking nut is threadedly mounted on the front end of the bolt body, and the locking nut is connected to the torque sensor through a connecting sleeve nested outside the locking nut; A lubrication mechanism for applying lubricating oil to the surface of the bolt body is arranged inside the mounting block.

[0009] Preferably, a limit block engaged with the head of the bolt body is installed on the right side inside the detection tool, and an axial detector for detecting the axial movement of the bolt body is fixedly installed on the side of the limit block, and the axial detector is fixedly connected to the detection tool.

[0010] Preferably, a sensing contact is fixedly installed on the lower surface of the installation groove, the sensing contact is set to a contact sensing mode, and the sensing contact is electrically connected to an alarm light fixedly installed on the outer surface of the detection tooling, and the sensing contact is used to detect whether the installation block is installed in place.

[0011] Preferably, the lubrication mechanism includes a coating nozzle fixedly installed in the hole of the mounting block and a storage box fixedly installed on the upper surface of the mounting block, and the coating nozzle is configured as an atomizing nozzle structure, and the lubricating oil is applied to the outer surface of the bolt body by the coating nozzle.

[0012] Preferably, lubricating oil is stored inside the storage box, and a first connecting pipe connected to the storage box is fixedly installed on the side of the storage box, and a one-way valve is arranged outside the first connecting pipe, so that the lubricating oil cannot flow back into the storage box.

[0013] Preferably, a pressure groove for temporarily storing lubricating oil is provided inside the mounting block, and the bottom end of the first connecting pipe is connected to the pressure groove, and an extrusion roller made of soft rubber is rotatably mounted on the side of the mounting block.

[0014] Preferably, a transversely arranged piston plate is installed inside the pressure groove, and an up and down sliding structure is formed between the piston plate and the pressure groove, and a return spring is fixedly installed between the upper surface of the piston plate and the upper end of the pressure groove, and the lubricating oil in the pressure groove is squeezed out by the downward movement of the piston plate.

[0015] Preferably, a first magnetic block is fixedly mounted on the lower surface of the piston plate, and the first magnetic block corresponds to and is magnetically attracted to a second magnetic block fixedly mounted on the bottom of the mounting groove.

[0016] Preferably, the first connecting tube slides through the piston plate, and the bottom end of the first connecting tube is always below the piston plate, and the pressure groove is connected to the coating nozzle through the second connecting tube.

[0017] Preferably, a cooling fan is installed on the side of the power box, and the cooling fan and the torque sensor are located in correspondence with each other. The cooling fan can be used to dissipate heat at the torque sensor to reduce temperature influence.

[0018] Compared with the prior art, the invention has the following beneficial effects: the low-resistance bolt torque detector adopts a new structural design, and its specific contents are as follows: 1. Use the connecting sleeve to connect the torque sensor and the lock nut, and then drive the lock nut to rotate through the rotating shaft on the side of the power box. At this time, the torque sensor is used to detect the torque. The detected data is displayed on the digital display controller through the signal transmission line. In this process, the detection tooling can be slid on the adjustment slide according to the different lengths of the bolt body, and the spacing can be adjusted to adapt to the use of all bolts; Furthermore, the bolt body is installed in the detection tooling through the connection between the mounting block and the mounting slot. When the mounting block is installed in place, it will contact the sensing contact at the bottom of the mounting slot. If it is not installed in place, the sensing contact is not fully contacted. At this time, the alarm light outside the detection tooling will light up to remind the staff to make adjustments to avoid misalignment that affects the accuracy of torque detection. Furthermore, a cooling fan is arranged on the side of the power box, and the cooling fan can be used to dissipate heat from the torque sensor at high temperatures, so that changes in surface temperature affect the torque detection results.

[0019] 2. After the mounting block is installed in place, the magnetic adsorption between the first magnetic block and the second magnetic block is used to move the piston plate downward in the pressure groove, so that the lubricating oil in the pressure groove is sprayed out from the coating nozzle through the second connecting pipe, so that the lubricating oil is applied to the outside of the bolt body to avoid excessive friction between the bolt body and the locking nut to affect the accuracy of torque detection; Furthermore, after the mounting block is taken out, the piston plate is reset by utilizing the elastic action of the reset spring, thereby utilizing the negative pressure to suck the lubricating oil in the storage box into the pressure groove, thereby ensuring the subsequent use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall southwest axis structure of the present invention; Figure 2 It is a schematic diagram of the overall southeast axis side structure of the present invention; Figure 3 This is a schematic diagram of the structure of the adjusting slideway of the present invention; Figure 4 This is a schematic diagram of the power box structure of the present invention; Figure 5 It is a schematic diagram of the structure of the connecting sleeve of the present invention; Figure 6 This is a schematic structural diagram of the connection relationship between the bolt body and the limit block of the present invention; Figure 7 This is a schematic diagram of the internal bottom surface structure of the installation groove of the present invention; Figure 8 This is a schematic diagram of the installation block structure of the present invention; Fig. 9 This is a schematic diagram of the cross-sectional structure of the mounting block of the present invention; Fig.10It is a structural schematic diagram of the connection relationship between the first connecting pipe and the piston plate of the present invention.

[0021] In the figure: 1. operating platform; 2. power box; 201. cooling fan; 3. digital display controller; 4. rotating shaft; 5. torque sensor; 6. signal transmission line; 7. detection tooling; 701. mounting slot; 702. adjusting slide; 8. limit block; 9. axial detector; 10. mounting block; 11. bolt body; 12. locking nut; 13. connecting sleeve; 14. induction contact; 15. alarm light; 16. coating nozzle; 17. storage box; 18. pressure tank; 19. first connecting pipe; 20. one-way valve; 21. second connecting pipe; 22. piston plate; 23. reset spring; 24. first magnetic block; 25. second magnetic block; 26. extrusion roller. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-Figure 6 In order to achieve the purpose of bolt torque detection, the present embodiment provides the following technical solutions, which specifically disclose: an operating platform 1 with a desktop structure, a power box 2 is fixedly installed on the left side of the upper surface of the operating platform 1, and a digital display controller 3 is placed above the power box 2, a rotating shaft 4 for outputting power is rotatably installed on the right side of the power box 2, and a torque sensor 5 is fixedly installed on the top of the rotating shaft 4, and the torque sensor 5 transmits data with the digital display controller 3 through a signal transmission line 6, a detection tool 7 is arranged on the right side above the operating platform 1, a mounting groove 701 is opened inside the detection tool 7, and a left-right sliding connection is formed between the detection tool 7 and the adjustment slide 702 below it. The structure is structured, and the adjusting slide 702 is fixedly installed on the upper surface of the operating platform 1. A mounting block 10 with a square structure is slidably installed inside the mounting groove 701. A bolt body 11 to be detected is installed in the through hole inside the mounting block 10, and a locking nut 12 is threadedly installed on the front end of the bolt body 11. The locking nut 12 is connected to the torque sensor 5 through a connecting sleeve 13 nested outside it. A limit block 8 engaged with the head of the bolt body 11 is installed on the right side of the detection tooling 7, and an axial detector 9 for detecting the axial movement of the bolt body 11 is fixedly installed on the side of the limit block 8, and the axial detector 9 is fixedly connected to the detection tooling 7.

[0024] When using the device, first, the bolt body 11 to be detected is passed through the hole opened in the mounting block 10 (there is only a penetration between the two and no threaded connection), and then the locking nut 12 is threadedly connected to the bolt body 11. After the assembly is completed, the mounting block 10 is slidably installed in the mounting groove 701 on the inner side of the detection tool 7. At this time, the head of the bolt body 11 slides into the limit block 8 to form a limit. Then, the connecting sleeve 13 is sleeved on the outside of the locking nut 12 (the two are mutually engaged, that is, the connecting sleeve 13 can drive the locking nut 12 to rotate). Then, the detection tool 7 is slid on the adjustment slide 702, so that the other end of the connecting sleeve 13 and the torque sensor 5 are mutually engaged. After the docking is completed, the power box 2 is opened by the digital display controller 3, so that the rotating shaft 4 on the side of the power box 2 drives the torque sensor 5 to rotate, so that the locking nut 12 and the bolt body 11 are locked. At this time, the torque sensor 5 is used in conjunction with the axial detector 9 to achieve the purpose of measuring the torque, and the measured data is transmitted to the digital display controller 3 through the signal transmission line 6 for display.

[0025] Example 2: Please refer to Figure 4 and Figure 7 In order to avoid the problem of inadequate installation during detection and affecting the detection accuracy, the present embodiment provides the following technical solutions, which specifically disclose: a sensing contact 14 is fixedly installed on the lower surface of the inner part of the installation groove 701, the sensing contact 14 is set to a contact sensing mode, and the sensing contact 14 is electrically connected to an alarm light 15 fixedly installed on the outer surface of the detection tooling 7, a cooling fan 201 is installed on the side of the power box 2, and the positions of the cooling fan 201 and the torque sensor 5 correspond to each other.

[0026] When assembling the mounting block 10, if it is installed in place, the sensing contacts 14 at the bottom of the mounting groove 701 are not all contacted. At this time, the alarm light 15 is on, thereby reminding the staff to adjust the mounting block 10 to avoid misalignment due to improper installation during detection, which may affect the accuracy of torque detection. When the ambient temperature is high, the cooling fan 201 on the side of the power box 2 can be turned on to dissipate the heat at the torque sensor 5 position to avoid the temperature affecting the detection results.

[0027] Example 3: Please refer to Figure 8-Figure 10In order to solve the problem that the friction between the bolt and the nut is large and affects the accuracy of torque detection, the present embodiment provides the following technical solutions, which specifically disclose: a lubrication mechanism for applying lubricating oil to the surface of the bolt body 11 is arranged inside the mounting block 10, and the lubrication mechanism includes an application nozzle 16 fixedly installed in the hole of the mounting block 10 and a storage box 17 fixedly installed on the upper surface of the mounting block 10, and the application nozzle 16 is configured as an atomizing nozzle structure, lubricating oil is stored inside the storage box 17, and a first connecting pipe 19 connected to the storage box 17 is fixedly installed on the side of the storage box 17, and a one-way valve 20 is arranged outside the first connecting pipe 19, and a pressure groove 18 for temporarily storing lubricating oil is opened inside the mounting block 10, and the bottom end of the first connecting pipe 19 is connected to the pressure groove 18. The grooves 18 are interconnected, and an extrusion roller 26 made of soft rubber is rotatably installed on the side of the mounting block 10. A transversely arranged piston plate 22 is installed inside the pressure groove 18, and an up and down sliding structure is formed between the piston plate 22 and the pressure groove 18, and a return spring 23 is fixedly installed between the upper surface of the piston plate 22 and the upper end of the pressure groove 18, a first magnetic block 24 is fixedly installed on the lower surface of the piston plate 22, and the first magnetic block 24 and the second magnetic block 25 fixedly installed at the bottom of the mounting groove 701 correspond to each other and are magnetically attracted, the first connecting tube 19 slides through the piston plate 22, and the bottom end of the first connecting tube 19 is always below the piston plate 22, and the pressure groove 18 is interconnected with the coating nozzle 16 through the second connecting tube 21.

[0028] After the mounting block 10 is installed in place, the magnetic adsorption effect between the first magnetic block 24 and the second magnetic block 25 is utilized to drive the piston plate 22 to move downward inside the pressure groove 18, so that the piston plate 22 sprays the lubricating oil in the pressure groove 18 from the coating nozzle 16 through the second connecting pipe 21, and applies the lubricating oil to the surface of the bolt body 11, so as to achieve the purpose of lubrication with less friction resistance. After the mounting block 10 is removed, the first magnetic block 24 loses the attraction of the second magnetic block 25, and at this time, the piston plate 22 is driven to reset upward under the elastic action of the reset spring 23, so that the negative pressure in the pressure groove 18 is utilized to suck the lubricating oil in the storage box 17 through the first connecting pipe 19 (because a one-way valve 20 is arranged outside the first connecting pipe 19, the lubricating oil cannot flow back into the storage box 17).

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-resistance bolt torque detector, comprising an operating platform (1) in a desktop structure, a power box (2) being fixedly mounted on the left side of the upper surface of the operating platform (1), and a digital display controller (3) being placed above the power box (2). It is characterized in that Also includes: A rotating shaft (4) for outputting power is rotatably mounted on the right side of the power box (2), and a torque sensor (5) is fixedly mounted on the top end of the rotating shaft (4), and data is transmitted between the torque sensor (5) and the digital display controller (3) via a signal transmission line (6); A detection tool (7) is arranged on the upper right side of the operating platform (1), a mounting groove (701) is provided inside the detection tool (7), and a left-right sliding structure is formed between the detection tool (7) and the adjustment slide (702) below it, and the adjustment slide (702) is fixedly mounted on the upper surface of the operating platform (1); A square-structured mounting block (10) is slidably mounted inside the mounting groove (701), a bolt body (11) to be detected is mounted in a through hole inside the mounting block (10), and a locking nut (12) is threadedly mounted on the front end of the bolt body (11), and the locking nut (12) is connected to the torque sensor (5) via a connecting sleeve (13) nested outside the locking nut (12); A lubrication mechanism for applying lubricating oil to the surface of the bolt body (11) is provided inside the mounting block (10).

2. A low resistance bolt torque detector according to claim 1, Features: A limit block (8) engaged with the head of the bolt body (11) is installed on the right side of the detection tool (7), and an axial detector (9) for detecting the axial movement of the bolt body (11) is fixedly installed on the side of the limit block (8), and the axial detector (9) is fixedly connected to the detection tool (7).

3. A low-resistance bolt torque detector according to claim 1, Features: A sensing contact (14) is fixedly mounted on the lower surface of the mounting groove (701), the sensing contact (14) is set to a contact sensing mode, and the sensing contact (14) is electrically connected to an alarm light (15) fixedly mounted on the outer surface of the detection tooling (7).

4. A low resistance bolt torque detector according to claim 1, Features: The lubrication mechanism comprises a coating nozzle (16) fixedly mounted in a hole of the mounting block (10) and a storage box (17) fixedly mounted on the upper surface of the mounting block (10), and the coating nozzle (16) is configured as an atomizing nozzle structure.

5. A low resistance bolt torque detector according to claim 4, Features: Lubricating oil is stored inside the storage box (17), and a first connecting pipe (19) in communication with the storage box (17) is fixedly mounted on the side of the storage box (17), and a one-way valve (20) is arranged outside the first connecting pipe (19).

6. A low resistance bolt torque detector according to claim 5, Features: A pressure groove (18) for temporarily storing lubricating oil is provided inside the mounting block (10), and the bottom end of the first connecting pipe (19) is connected to the pressure groove (18), and a squeezing roller (26) made of soft rubber is rotatably mounted on the side of the mounting block (10).

7. A low resistance bolt torque detector according to claim 6, Features: A transversely arranged piston plate (22) is installed inside the pressure groove (18), and an up-and-down sliding structure is formed between the piston plate (22) and the pressure groove (18), and a return spring (23) is fixedly installed between the upper surface of the piston plate (22) and the upper end of the pressure groove (18).

8. A low resistance bolt torque detector according to claim 7, Features: A first magnetic block (24) is fixedly mounted on the lower surface of the piston plate (22), and the first magnetic block (24) corresponds to and is magnetically attracted to a second magnetic block (25) fixedly mounted on the bottom of the mounting groove (701).

9. A low resistance bolt torque detector according to claim 8, Features: The first connecting tube (19) slides through the piston plate (22), and the bottom end of the first connecting tube (19) is always located below the piston plate (22), and the pressure groove (18) is connected to the coating nozzle (16) via the second connecting tube (21).

10. A low resistance bolt torque detector according to claim 1, Features: A cooling fan (201) is installed on the side of the power box (2), and the positions of the cooling fan (201) and the torque sensor (5) correspond to each other.

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