Threaded connection tightening practical training platform with pre-tightening force function

Abstract

The utility model belongs to the technical field of practical training equipment, and particularly discloses a threaded connection tightening practical training platform with a pre-tightening force function, which comprises a rack, a telescopic cylinder, a control valve, a pressure gauge and a storage container for storing a working medium for feeding back the magnitude of pre-tightening force, the end part of a piston rod of the telescopic cylinder is connected with a test bolt, and one end, far away from the piston rod of the telescopic cylinder, of the test bolt penetrates out of one side of the rack; the storage container is communicated with a rod cavity and a rodless cavity of the telescopic cylinder through pipelines, the control valve is installed on the pipeline between the storage container and the rod cavity or the rodless cavity of the telescopic cylinder, and the pressure gauge is used for measuring the pressure in the rod cavity or the rodless cavity of the telescopic cylinder. According to the utility model, trainees can better understand threaded connection, false tightening and the like are prevented, and the reliability of connection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of training equipment, in particular to a threaded connection tightening training platform with a pre-tightening function. Background Art

[0002] Threaded connections are the primary method of assembly connection. Threaded connection tightening training benches are training equipment for operators to assemble and tighten threaded connections (used for pre-job training in vocational schools and automobile assembly plants, etc.). The axial preload generated by tightening threaded connections reliably connects the connected parts together. Excessively large or insufficient preload can lead to potential risks; therefore, the essential requirement for tightening threaded connections is the control of the preload. Threaded connections are generally tightened and preload is generated by applying torque. However, due to variations in assembly conditions (such as different friction coefficients of thread pairs, thread damage, lubrication, etc.), the preload generated by the same tightening torque is not consistent.

[0003] Existing threaded connection tightening training platforms generally only support assembly and tightening functions, and are unable to demonstrate the actual phenomenon of inconsistent preload force caused by changes in assembly conditions. As a result, trainees cannot better understand threaded connections, and false tightening and other phenomena are prone to occur. The reliability of threaded connections is poor, which can easily lead to safety hazards. Utility Model Content

[0004] The utility model provides a threaded connection tightening training platform with a pre-tightening function, which aims to enable trainees to better understand threaded connections, prevent false tightening, and improve connection reliability.

[0005] The utility model is achieved through the following technical solutions:

[0006] A threaded connection tightening training platform with a pre-tightening function includes a platform, a telescopic cylinder, a control valve, a pressure gauge, and a storage container for storing a working medium for feedback of the pre-tightening force. The telescopic cylinder is horizontally connected to the platform, and a test bolt is connected to the end of the piston rod of the telescopic cylinder. The end of the test bolt, which is away from the piston rod of the telescopic cylinder, passes through a side of the platform.

[0007] The storage container is connected to the rod chamber and rodless chamber of the telescopic cylinder through a pipeline, the control valve is installed on the pipeline between the storage container and the rod chamber or rodless chamber of the telescopic cylinder, and the pressure gauge is used to measure the pressure in the rod chamber or rodless chamber of the telescopic cylinder.

[0008] Compared with the existing technology, this solution has the following advantages and beneficial effects:

[0009] Since the axial preload of bolts is not easy to measure intuitively, commonly used methods include ultrasonic measurement, pressure washer sensor measurement, strain gauge measurement, etc.; the common characteristics of these methods are that the measuring equipment is of high value, the detection principle is complex, and the detection site conditions are demanding, which is not conducive to the trainees' understanding and acceptance.

[0010] In the training bench in this scheme, the working medium in the storage container is injected into the telescopic cylinder, and the channel of the pipeline is controlled by tightening the nut on the test bolt through the control valve. When the control valve disconnects the connection between the rod cavity or rodless cavity of the telescopic cylinder and the storage container, the rod cavity or rodless cavity of the telescopic cylinder is kept at a certain pressure, and the pressure in the rod cavity or rodless cavity of the telescopic cylinder is displayed by a pressure gauge. Subsequently, by changing different assembly conditions, the nut on the test bolt is tightened, and the pressure change displayed by the pressure gauge is used to feedback the influence of different assembly conditions on the preload force. The training bench of this scheme uses the pressure displayed by the pressure gauge to express intuitively. The principle is simple, easy to implement, and easy to understand.

[0011] The training bench in this solution can help trainees better understand threaded connections, prevent false tightening, and thus improve the reliability of subsequent threaded connections.

[0012] Furthermore, the telescopic cylinder is an oil cylinder, the storage container is an oil tank, and the working medium in the storage container is hydraulic oil. The oil tank is connected to two oil ports of the oil cylinder through a pipeline.

[0013] Beneficial effect: The telescopic cylinder in this solution adopts an oil cylinder, which provides power for the movement of the oil cylinder by manually tightening the test bolts and pulling the piston rod axially. Its structure is simple and it is more convenient to control the pressure in the rod chamber and (or) rodless chamber in the oil cylinder.

[0014] Furthermore, the control valve is installed on a pipeline between the oil tank and the rod chamber of the oil cylinder.

[0015] Beneficial effect: In this solution, since the test bolt is connected to the piston rod of the oil cylinder, the pre-tightening force of the test bolt will pull the piston rod to move. In this solution, pressure is generated by filling hydraulic oil into the rod chamber, and the pressure gauge can more accurately reflect the pressure changes in the rod chamber.

[0016] Furthermore, an overflow valve is installed on the pipeline between the control valve and the rod chamber of the oil cylinder.

[0017] Beneficial effect: The relief valve in this solution can control the pressure within a certain range. When the pressure in the rod chamber of the oil cylinder is too high, the pressure can be reduced to protect the safety of the system.

[0018] Furthermore, the control valve is a two-position two-way manually controlled rotary valve.

[0019] Beneficial effect: The control valve in this solution adopts a two-position two-way manual rotary valve to facilitate the on-off control of the pipeline.

[0020] Furthermore, a balance shaft is coaxially connected to the piston rod of the telescopic cylinder, and the test bolt is coaxially connected to the balance shaft.

[0021] Beneficial effects: In this solution, the balancing shaft can be used to balance non-axial forces and protect the telescopic cylinder and the piston rod. The setting of the balancing shaft can facilitate the connection of the test bolt without damaging the piston rod of the telescopic cylinder.

[0022] Furthermore, a balancing shaft bracket is provided on the outer side of the balancing shaft, the balancing shaft bracket is connected to the stand, and the balancing shaft passes through the balancing shaft bracket and can move axially along the balancing shaft bracket.

[0023] Beneficial effects: The balancing shaft bracket in this solution can support the balancing shaft and ensure the stability of the balancing shaft. At the same time, the balancing shaft bracket can guide the axial movement of the balancing shaft, making the position accuracy of the balancing shaft higher.

[0024] Furthermore, a bracket is connected to the outer side of the cylinder barrel of the telescopic cylinder, the bracket is connected to the platform, and the cylinder barrel of the telescopic cylinder and the bracket are rotated and matched along a direction perpendicular to the axis of the cylinder barrel of the telescopic cylinder.

[0025] Beneficial effects: The bracket in this solution can provide installation support for the telescopic cylinder, and the cylinder barrel of the telescopic cylinder in this solution rotates with the bracket, so that the telescopic cylinder has an up and down swinging state, which makes it easy to control the state of the telescopic cylinder and flexibly adjust the position between the telescopic cylinder and the balance shaft, thereby ensuring the coaxiality of the telescopic cylinder, the balance shaft and the test bolt.

[0026] Furthermore, intermediate ear shafts are connected to both sides of the cylinder barrel of the telescopic cylinder, and bosses are provided at positions corresponding to the two intermediate ear shafts on the bracket. Boss holes are provided on the bosses, and the intermediate ear shafts on both sides of the telescopic cylinder are respectively inserted into the boss holes of the two bosses and can rotate along the center of the boss holes.

[0027] Beneficial effects: In this solution, the cylinder barrel of the telescopic cylinder is rotatably matched with the boss hole of the boss through the intermediate trunnion, and its structure is simple.

[0028] Furthermore, a plurality of practice holes are provided on the stand, and a plurality of practice bolts are connected to the stand.

[0029] Beneficial effects: The practice holes and practice bolts in this solution make it easier for trainees to practice threaded connections on the training bench, thereby making the entire training bench more functional and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a three-dimensional diagram of an embodiment of a threaded connection tightening training platform with a pre-tightening function according to the utility model;

[0032] Figure 2 This is a top view of an embodiment of a threaded connection tightening training platform with a pre-tightening function according to the utility model;

[0033] Figure 3 for Figure 2 Cross-sectional view at the middle BB;

[0034] Figure 4 This is the exploded view between the oil cylinder and the bracket;

[0035] Figure 5 This is a rear view of an embodiment of a threaded connection tightening training platform with a pre-tightening function according to the present invention;

[0036] Figure 6 This is a hydraulic principle diagram of an embodiment of a threaded connection tightening training platform with a pre-tightening function of the utility model.

[0037] Markings and corresponding parts names in the accompanying drawings:

[0038] Left longitudinal beam 1, front cross beam 2, right longitudinal beam 3, front center cross beam 4, oil cylinder 5, intermediate ear shaft 501, rear center cross beam 6, oil tank 7, pressure gauge 8, manual rotary valve 9, rear cross beam 10, mounting plate 11, practice bolt 12, test bolt 13, practice hole 14, piston rod 15, bracket 16, boss 161, connecting pin 17, balance shaft bracket 18, balance shaft 19, relief valve 20, oil tank bracket 21, pipe joint 22, three-way pipe joint 23, rotary valve bracket 24, oil tank fastening bracket 25. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0040] like Figure 1-Figure 2As shown, this embodiment provides a threaded connection tightening training platform with a preload function, comprising a platform, a telescopic cylinder, a pressure gauge 8, a control valve, and a storage container for storing a working medium that provides feedback on the preload force. The telescopic cylinder is horizontally connected to the platform, and a test bolt 13 is connected to the end of the telescopic cylinder's piston rod 15. The end of the test bolt 13, which is away from the telescopic cylinder's piston rod 15, extends through one side of the platform. Specifically, in this embodiment, the platform comprises a left longitudinal beam 1, a right longitudinal beam 3, a front crossbeam 2, a rear crossbeam 10, a front center crossbeam 4, and a rear center crossbeam 6. The front crossbeam 2 and the rear crossbeam 10 are respectively located between the left longitudinal beam 1 and the right longitudinal beam 3, and are riveted together to form a rectangular frame structure.

[0041] The front center cross beam 4 and the rear center cross beam 6 are arranged parallel to each other, and the two are vertically riveted between the left longitudinal beam 1 and the right longitudinal beam 3. The left longitudinal beam 1, the right longitudinal beam 3, the front cross beam 2, the rear cross beam 10, the front center cross beam 4 and the rear center cross beam 6 are interconnected to form a whole platform.

[0042] In this embodiment, the telescopic cylinder is a single-rod piston oil cylinder 5, which is connected between the front middle cross beam 4 and the rear middle cross beam 6. Figure 3 As shown, a balancing shaft 19 is coaxially connected to the piston rod 15 of the oil cylinder 5, and the test bolt 13 is coaxially connected to the balancing shaft 19. Specifically: in this embodiment, the balancing shaft 19 and the piston rod 15 of the oil cylinder 5 are connected and limited by inserting a connecting pin 17, and then a gasket and a cotter pin are installed on the connecting pin 17 to prevent the connecting pin 17 from detaching; the interior of the balancing shaft 19 is hollow, and the head of the test bolt 13 is limited in the balancing shaft 19, and the other end of the test bolt 13 passes through the end hole of the balancing shaft 19 and the end hole of the left longitudinal beam 1 in sequence, and the outer side of the test bolt 13 is fixed to the balancing shaft 19 by tightening the nut.

[0043] Combine Figure 1 、 Figure 2 and Figure 3 As shown, a balancing shaft bracket 18 is provided on the outside of the balancing shaft 19. The two sides of the balancing shaft bracket 18 are respectively connected to the front center crossbeam 4 and the rear center crossbeam 6 of the platform by bolts. A through hole is defined in the center of the balancing shaft bracket 18. The balancing shaft 19 passes through the through hole of the balancing shaft bracket 18 and can move axially along the balancing shaft bracket 18. The balancing shaft bracket 18 can support the balancing shaft 19 and also provide installation positioning and guidance for the balancing shaft 19.

[0044] The outer side of the cylinder of the telescopic cylinder is connected to a bracket 16, which is connected to the platform. In this embodiment, there are two brackets 16, which are respectively connected to the front middle crossbeam 4 and the rear middle crossbeam 6 of the platform by bolts. The cylinder of the telescopic cylinder and the bracket 16 rotate in a direction perpendicular to the axis of the cylinder of the telescopic cylinder, that is, the cylinder of the telescopic cylinder can swing up and down, combined with Figure 4As shown, in this embodiment, intermediate ear shafts 501 are vertically connected to both sides of the cylinder barrel of the telescopic cylinder. The intermediate ear shafts 501 are integrally formed with the cylinder barrel or welded and fixed. Bosses 161 are provided at positions corresponding to the two intermediate ear shafts 501 on the two brackets 16. Boss holes are coaxially opened on the bosses 161. The intermediate ear shafts 501 on both sides of the telescopic cylinder are respectively inserted into the boss holes of the two bosses 161 and can rotate along the center of the boss holes.

[0045] The storage container is connected to the rod chamber and rodless chamber of the oil cylinder 5 through a pipeline. The control valve is installed on the pipeline between the storage container and the rod chamber or rodless chamber of the telescopic cylinder. The pressure gauge 8 is used to measure the pressure in the rod chamber or rodless chamber of the telescopic cylinder. Figure 5 and Figure 6 As shown, in this embodiment, the storage container is an oil tank 7, which is used to store a working medium for feedback of the preload force. The working medium in the oil tank 7 in this embodiment is hydraulic oil. The oil tank 7 is connected to the two oil ports of the oil cylinder 5 through a pipeline. Specifically:

[0046] In this embodiment, the control valve is a two-position, two-way manual rotary valve 9, which is installed on the pipeline between the oil tank 7 and the rod chamber of the oil cylinder 5. When the two-position, two-way manual rotary valve 9 is moved to the right position, the connection between the rod chamber of the oil cylinder 5 and the oil tank 7 is disconnected. When the two-position, two-way manual rotary valve 9 is moved to the left position, the rod chamber of the oil cylinder 5 is connected to the oil tank 7. A pressure gauge 8 is used to measure the pressure in the rod chamber of the oil cylinder 5. A relief valve 20 is also installed on the pipeline between the manual rotary valve 9 and the rod chamber of the oil cylinder 5. In this embodiment, the relief valve 20 can be integrated into the manual rotary valve 9.

[0047] Combine Figure 1 and Figure 5 As shown, a mounting plate 11 is vertically connected to the inner side of the stand and on the right longitudinal beam 3 , and the lower portion of the mounting plate 11 is fixed to a side surface of the right longitudinal beam 3 by bolts.

[0048] The oil tank 7, pressure gauge 8 and manual rotary valve 9 are all installed on the mounting plate 11. Figure 2 、 Figure 3 and Figure 5 As shown, in this embodiment, an oil tank fastening bracket 25 is fixedly connected to the mounting plate 11 by bolts, and an oil tank bracket 21 is fixed to the oil tank fastening bracket 25 by bolts. The oil tank bracket 21 is semicircular in shape, and the end of the oil tank fastening bracket 25 facing away from the mounting plate 11 is an arc-shaped concave surface. When the oil tank 7 is installed, the oil tank 7 is located between the oil tank fastening bracket 25 and the oil tank bracket 21. The oil tank fastening bracket 25 and the oil tank bracket 21 are locked and fixed by bolts, and the oil tank 7 can be installed on the mounting plate 11.

[0049] In this embodiment, the manual rotary valve 9 is located between the pressure gauge 8 and the oil tank 7 and at the lower part of the mounting plate 11 , while the oil tank 7 and the pressure gauge 8 are installed at the upper part of the mounting plate 11 .

[0050] In this embodiment, a rotary valve bracket 24 is bolted to the lower portion of the mounting plate 11. The L-shaped bracket 24 is located on the upper surface of the bracket 24. The manual rotary valve 9 is provided with a handle for controlling the position of the valve core within the manual rotary valve 9. A three-way pipe joint 23 and a pipe joint 22 are connected to the bottom of the manual rotary valve 9. The pipe joint 22 is connected to the oil tank 7 via a pipeline. One of the ports of the three-way pipe joint 23 is connected to the rod chamber of the oil cylinder 5 via a pipeline, and the other port of the three-way pipe joint 23 is connected to the pressure gauge 8 via a pipeline.

[0051] In another embodiment, the frame is provided with a plurality of training holes 14, to which a plurality of training bolts 12 are connected. The training bolts 12 are welded or screwed to the frame's left longitudinal beam 1. In this embodiment, the training holes 14 and the training bolts 12 are located at the front and rear of the left longitudinal beam 1, respectively, and are arranged in a rectangular array and a circular array.

[0052] Practice assembling and tightening (or disassembling) bolts, nuts, washers, and spring washers at practice hole 14 on the left longitudinal beam using manual, pneumatic, or electric tightening tools. Assemble a set of threaded connections into a rectangular or circular shape using practice hole 14 and practice tightening them in a crosswise sequence. Use a torque wrench to check the tightening torque. Use practice bolt 12 to practice tightening and disassembling nuts, washers, and spring washers.

[0053] The specific implementation process is as follows:

[0054] Connect the hydraulic lines and fill them with hydraulic oil. Screw a nut into the end of the test bolt 13 on the outside of the left longitudinal beam 1. Tighten the nut with a torque tool. This nut will generate an axial preload force F. This axial preload force will move the piston rod 15 through the balance shaft 19 and connecting pin 17, causing the internal pressure of the oil cylinder 5 to change.

[0055] By moving the two-position two-way manual rotary valve 9 to the right position, the connection between the rod chamber of the oil cylinder 5 and the oil tank is disconnected, and the closed hydraulic oil generates pressure, and the corresponding value can be read through the pressure gauge 8.

[0056] Use bolts and nuts with different friction coefficients, apply engine oil or not, etc., tighten the nuts with the same tightening torque, and observe the changes in the oil pressure of the pressure gauge 8, so as to demonstrate the influence of different assembly conditions on the preload force and realize the preload force demonstration function of the training platform.

[0057] It should be noted that the above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0058] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0059] In the description of this document, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0060] In the descriptions of this document, some terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0061] In this document, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0062] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing document for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0063] The terms used in this document are those commonly used in the art currently in consideration of the functions of the present disclosure, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present disclosure.

[0064] Flowcharts or text are used in this document to illustrate the operational steps performed according to the embodiments of the present application. It should be understood that the operational steps in the embodiments of the present application are not necessarily performed in the exact order in which they are described. Instead, the various steps may be processed in reverse order or simultaneously, as needed. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A threaded connection tightening training platform with a pre-tightening function, comprising a platform, characterized in that: It also includes a telescopic cylinder, a control valve, a pressure gauge, and a storage container for storing a working medium for feedback of the preload force. The telescopic cylinder is horizontally connected to the platform. The end of the piston rod of the telescopic cylinder is connected to a test bolt. The end of the test bolt away from the piston rod of the telescopic cylinder passes through a side of the platform. The storage container is connected to the rod chamber and rodless chamber of the telescopic cylinder through a pipeline, the control valve is installed on the pipeline between the storage container and the rod chamber or rodless chamber of the telescopic cylinder, and the pressure gauge is used to measure the pressure in the rod chamber or rodless chamber of the telescopic cylinder.

2. A threaded connection tightening training platform with a pre-tightening function according to claim 1, characterized in that: The telescopic cylinder is an oil cylinder, the storage container is an oil tank, and the working medium in the storage container is hydraulic oil. The oil tank is connected to two oil ports of the oil cylinder through a pipeline.

3. The threaded connection tightening training platform with pre-tightening function according to claim 2, characterized in that: The control valve is installed on a pipeline between the oil tank and the rod chamber of the oil cylinder, and the pressure gauge is used to measure the pressure in the rod chamber of the oil cylinder.

4. A threaded connection tightening training platform with a pre-tightening function according to claim 3, characterized in that: An overflow valve is also installed on the pipeline between the control valve and the rod chamber of the oil cylinder.

5. A threaded connection tightening training platform with a pre-tightening function according to any one of claims 1 to 4, characterized in that: The control valve is a two-position two-way manually controlled rotary valve.

6. A threaded connection tightening training platform with a pre-tightening function according to any one of claims 1 to 4, characterized in that: A balancing shaft is coaxially connected to the piston rod of the telescopic cylinder, and the test bolt is coaxially connected to the balancing shaft.

7. The threaded connection tightening training platform with pre-tightening function according to claim 6, characterized in that: A balancing shaft bracket is provided on the outer side of the balancing shaft, the balancing shaft bracket is connected to the platform, and the balancing shaft passes through the balancing shaft bracket and can move axially along the balancing shaft bracket.

8. The threaded connection tightening training platform with pre-tightening function according to claim 7, characterized in that: The outer side of the cylinder barrel of the telescopic cylinder is connected with a bracket, and the bracket is connected to the platform. The cylinder barrel of the telescopic cylinder and the bracket rotate in a direction perpendicular to the axis of the cylinder barrel of the telescopic cylinder.

9. The threaded connection tightening training platform with pre-tightening function according to claim 8, characterized in that: Intermediate ear shafts are connected to both sides of the cylinder barrel of the telescopic cylinder. Bosses are provided at positions corresponding to the two intermediate ear shafts on the bracket. Boss holes are provided on the bosses. The intermediate ear shafts on both sides of the telescopic cylinder are respectively inserted into the boss holes of the two bosses and can rotate along the center of the boss holes.

10. A threaded connection tightening training platform with a pre-tightening function according to any one of claims 1 to 4, characterized in that: A plurality of training holes are provided on the platform, and a plurality of training bolts are connected to the platform.

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