Fastening tool for ferrule nut at narrow position

Abstract

The fastening tool comprises a fastening rod, the front end portion of the fastening rod is provided with a centering transmission groove used for driving the clamping sleeve nut at the narrow position to conduct circumferential transmission and conduct centering, and the centering transmission groove is opened upwards in the radial direction. The centering transmission groove is axially and backwards connected with a pipeline groove used for containing different pipelines, and the pipeline groove is also provided with an upward opening in the radial direction. And a rotating head is arranged at the rear end part of the fastening rod. The axial centering clamping of the clamping sleeve nut at the narrow part of the temperature measuring element by the torque fastening tool can be successfully realized.

Description

Technical Field

[0001] The utility model relates to a fastening tool for a clamping nut in a narrow place, belonging to the technical field of mechanical auxiliary devices. Background Art

[0002] Fixed torque means that each time the bolt is tightened, the same tightening force should be maintained to ensure a tight fit between the bolt and the nut. This not only prevents the bolt from loosening, but also ensures a stable connection between the various components, improving the reliability and service life of the overall machinery. The mechanism of fixed torque of bolts-fixed torque is to apply a stable tightening force to the bolt so that it fits tightly with the nut and the connected parts to form a stable connection structure. This tightening method can effectively resist external impact and pressure, prevent relative displacement of components, and thus protect the safe operation of mechanical equipment.

[0003] When assembling the temperature measuring element of the lower guide bearing of the Hualong main pump motor, due to the special design structure, the temperature measuring pipeline is connected to a narrow ferrule nut, and the narrow ferrule nut is set flat in a U-shaped groove. The gap between the narrow ferrule nut and the edge of the U-shaped groove is narrow, and the traditional tightening tools or torque wrenches currently available on the market cannot be inserted into the gap along the axial direction, and thus the fixed torque tightening of the ferrule nut at the narrow part of the temperature measuring element cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a tightening tool for a ferrule nut in a narrow place according to the needs of special application scenarios in response to the above-mentioned problems, which can successfully achieve axial centering clamping of the ferrule nut in the narrow place of a temperature measuring element by the torque tightening tool.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A fastening tool for a ferrule nut in a narrow place, comprising a fastening rod, wherein the front end of the fastening rod is provided with a centering transmission groove for driving the ferrule nut in a narrow place to transmit circumferentially and to center the ferrule nut, the centering transmission groove is opened radially upward, the centering transmission groove is axially connected to a pipeline groove for placing different pipelines rearwardly, the pipeline groove is also opened radially upward; the rear end of the fastening rod is provided with a rotating head.

[0007] Optionally, the pipeline groove includes at least two sections with different cross-sections distributed along the axial direction, for corresponding to different pipelines.

[0008] Optionally, the pipeline trough includes three sections distributed along the axial direction, and the width of the pipeline trough arranged in the middle section is greater than that of the front and rear sections.

[0009] Optionally, the rear opening of the pipeline trough is provided with an outwardly inclined chamfer.

[0010] Optionally, the fastening rod has at least one diameter-reducing section with a decreasing outer diameter from front to back.

[0011] Optionally, the rotating head is a hexagonal head.

[0012] Optionally, a torque wrench is connected to the rotating head.

[0013] Optionally, the distance between the lowest point of the pipeline trough and the axis of the fastening rod is half of the transverse width of the pipeline trough.

[0014] Optionally, the left and right side surfaces and the bottom surface of the pipeline trough are all flat surfaces.

[0015] Optionally, the left and right side surfaces of the centering transmission groove are planes, and the bottom surface of the centering transmission groove is a semicircular arc surface.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] 1. The utility model provides a tightening tool for a ferrule nut in a narrow place, which effectively solves the interference between the torque tightening tool and the extended closed pipeline of the temperature measuring element and the interference between the torque tightening tool and the extended closed pipeline of the temperature measuring element when the torque tightening tool is tightened and rotated. When used in combination with an ordinary torque wrench, the fixed torque tightening of the ferrule nut in the narrow place of the temperature measuring element of the lower guide bearing can be realized, ending the method of tightening with an ordinary wrench and relying on the operator's personal experience for more than ten years.

[0018] 2. The utility model provides a fastening tool for a ferrule nut in a narrow place. The variable-section slot is designed to adapt to the differences in specifications of temperature measuring elements from different suppliers, so as to meet the universality of the torque fastening tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 yes Figure 1 Cross-sectional view at point A.

[0021] Figure 3 yes Figure 1 Cross-sectional view at point B.

[0022] Figure 4 yes Figure 1 Cross-sectional view at point C.

[0023] Figure 5 yes Figure 1 Cross-sectional view at point D.

[0024] Markings in the figure: 1-fastening rod, 11-centering transmission groove, 12-pipeline groove, 13-rotating head, 14-chamfer, 15-reducing section. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in conjunction with the accompanying drawings.

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] A tightening tool for ferrule nuts in narrow places, such as Figure 1-5 As shown, it includes a fastening rod 1, the front end of which is provided with a centering transmission groove 11 for driving the ferrule nut in a narrow place to transmit circumferentially and to center the ferrule nut, the centering transmission groove 11 is opened radially upward, and the centering transmission groove 11 is axially connected to a pipeline groove 12 for placing different pipelines, the pipeline groove 12 is also opened radially upward; the rear end of the fastening rod 1 is provided with a rotating head 13.

[0028] Specifically, since the ferrule nut at the narrow part is connected with a temperature measuring tube, when driving the ferrule nut at the narrow part to rotate, it is also necessary to avoid the interference of the temperature measuring tube. In this scheme, the ferrule nut at the narrow part is circumferentially centered and fixed by the centering transmission groove 11, thereby driving the ferrule nut at the narrow part to transmit circumferentially, and at the same time, the opening of the centering transmission groove 11 is used to avoid the temperature measuring tube to prevent the conflict and interference with the temperature measuring tube. In addition, the temperature measuring tube can be guided and placed along the axial direction of the fastening rod 1 and fixed by the pipeline groove 12 to prevent the temperature measuring tube from interfering during the fastening process, and the opening of the pipeline groove 12 can be used to place the temperature measuring tube. The rotating head 13 can be used in combination with an ordinary torque wrench, and the original fastening position is transferred axially to the rotating head 13 through the fastening rod 1, thereby making the fastening position space wider and facilitating the use of the torque wrench.

[0029] As another specific embodiment, the pipeline groove 12 includes at least two sections with different cross-sections distributed along the axial direction, which are used to correspond to different pipelines. Since the sizes of temperature measuring tubes produced by different suppliers are different, the pipeline grooves 12 with different cross-sections can be matched with temperature measuring tubes of different sizes, thereby increasing the versatility of the fastening device.

[0030] As another specific implementation, the pipeline trough 12 includes three sections distributed along the axial direction, and the width of the pipeline trough 12 arranged in the middle section is greater than that of the front and rear sections. Because the temperature measuring tube has a rigid section at the connection, and the flexible section is after the rigid section. In this embodiment, the widths of the three sections of the pipeline trough 12 are 13mm, 15mm, and 12mm from front to back, respectively. Specifically, the rigid pipe section of the imported temperature measuring element is usually Φ11mm and Φ12mm; the rigid pipe section of the temperature measuring element of the domestic supplier is small in front and large in the back, with Φ12mm on the front side and Φ14mm on the back side. The first section of the pipeline trough 12 can match the front part of the rigid pipe section of the imported temperature measuring element and the rigid pipe section of the temperature measuring element of the domestic supplier, the second section of the pipeline trough 12 can match the rear part of the rigid pipe section of the temperature measuring element of the domestic supplier, and the third section of the pipeline trough 12 can match the flexible section.

[0031] As another specific implementation, the rear opening of the pipeline trough 12 is provided with an outwardly inclined chamfer 14. In order to avoid interference of the flexible section temperature measuring tube with the rotating head 13, the temperature measuring tube is turned at the flexible section, and the chamfer 14 cooperates with the bending part of the temperature measuring tube to prevent the temperature measuring tube from being damaged due to excessive turning angle. Specifically, the chamfer 14 is provided at the last section of the pipeline trough 12.

[0032] As another specific embodiment, the tightening rod 1 has at least one reducing section 15 with a decreasing outer diameter from front to back. Since the front end of the tightening rod 1 wraps the ferrule nut at the narrow part, and the rotating head 13 at the rear end is connected to the wrench, the diameter of the front end is larger than that of the rear end, and the reducing section 15 has a smoother transition, which is convenient for use.

[0033] As another specific embodiment, the rotating head 13 is a hexagonal head. Due to the shape of the hexagonal head, it is easy to use with a common torque wrench, thereby improving the efficiency of torque transmission. It is easy to tighten or loosen with a wrench, saving time and effort, and is easy to use. Specifically, the hexagonal head has no direct correlation with the size of the ferrule nut in the narrow place, but in the actual setting, a larger size is used so that it is not easy to slip when held in the hand. In this embodiment, the hexagonal head has a width across the flats of 24 mm.

[0034] As another specific embodiment, a torque wrench is connected to the rotating head 13. The correct torque can ensure the stability and reliability of the ferrule nut connection in the narrow place. The torque wrench can ensure that the torque applied each time is consistent, improve overall safety, and meet specific industry specifications and standards.

[0035] As another specific implementation, the distance between the lowest point of the pipeline groove 12 and the axis of the fastening rod 1 is half of the transverse width of the pipeline groove 12. Through this configuration, it is possible to ensure that the theoretical axis of the pipeline groove 12 is coaxial with the fastening rod 1, thereby ensuring that during the rotation of the fastening rod 1, axial interference between the temperature measuring tube and the fastening tool is avoided.

[0036] As another specific embodiment, the left and right side surfaces and the bottom surface of the pipeline groove 12 are all planes. The processing of the rectangular groove is relatively simple and can be processed by a general end mill. At the same time, since the cross-section of the pipeline groove 12 is relatively small, the use of the rectangular groove does not affect the strength of the fastening rod 1 itself.

[0037] As another specific embodiment, the left and right side surfaces of the centering transmission groove 11 are planes, and the bottom surface of the centering transmission groove 11 is a semicircular arc surface. Since the outer diameter structure of the fastening rod 1 should be as compact as possible, the semicircular arc design can reduce the cross section of the centering transmission groove 11, ensure the structural thickness between the centering transmission groove 11 and the fastening rod 1, and then ensure the clamping force performance of the fastening tool. Furthermore, the opposite side distance of the ferrule nut at the narrow part is 22mm, the width of the centering transmission groove 11 is 22mm, and the distance between the arc axis of the bottom surface of the centering transmission groove 11 and the axis of the fastening rod 1 is 6.5mm, which can make the clamping clearance between the ferrule nut at the narrow part and the centering transmission groove 11 be about 0.15mm.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The present invention is extended to any new features or any new combination disclosed in this specification, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

[0039] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

Claims

1. A fastening tool for a ferrule nut in a narrow space, characterized in that: The invention comprises a fastening rod (1), wherein the front end of the fastening rod (1) is provided with a centering transmission groove (11) for driving a ferrule nut to transmit circumferentially and to center the ferrule nut, the centering transmission groove (11) is radially open upward, the centering transmission groove (11) is axially connected to a pipeline groove (12) for placing different pipelines, the pipeline groove (12) is also radially open upward; the rear end of the fastening rod (1) is provided with a rotating head (13).

2. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The pipeline groove (12) comprises at least two sections with different cross-sections distributed along the axial direction, and is used to correspond to different pipelines.

3. The fastening tool for the ferrule nut in a narrow place according to claim 2, characterized in that: The pipeline trough (12) comprises three sections distributed along the axial direction, and the width of the pipeline trough (12) arranged in the middle section is greater than that of the front and rear sections.

4. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The rear opening of the pipeline trough (12) is provided with an outwardly inclined chamfer (14).

5. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The fastening rod (1) has at least one diameter-reducing section (15) with a decreasing outer diameter from front to back.

6. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The rotating head (13) is a hexagonal head.

7. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The rotating head (13) is connected to a torque wrench.

8. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The distance between the lowest point of the pipeline trough (12) and the axis of the fastening rod (1) is half the transverse width of the pipeline trough (12).

9. The fastening tool for a ferrule nut in a narrow space according to claim 1, characterized in that: The left and right side surfaces and the bottom surface of the pipeline trough (12) are all flat surfaces.

10. The fastening tool for the ferrule nut in a narrow place according to claim 1, characterized in that: The left and right side surfaces of the centering transmission groove (11) are planes, and the bottom surface of the centering transmission groove (11) is a semicircular arc surface.

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