Holding and clamping thread type coupler

Abstract

The utility model discloses a clamping thread type coupler which comprises a coupler body, the connecting end of the coupler body is provided with a conical inner hole with a large outside and a small inside in the axial direction, a chuck matched with the conical inner hole in structure is installed in the conical inner hole, and the outer side wall of the chuck is tightly attached to the inner side wall of the conical inner hole. A locking nut is sleeved on the outer side wall of the coupling body at the hole section of the conical inner hole; and the locking nut is in threaded connection with the coupling body. The utility model has the beneficial effects that the clamping force is increased, the matching precision and concentricity are high, the stability is good, the coupling is not easy to damage, the service life is prolonged by 3-4 times compared with the conventional coupling, the installation is convenient, the universality is strong, the economy and durability are realized, the problem of the size of the flat key is not considered, and the testing of the flat key output ends of all general small gasoline engines and diesel engines can be met; therefore, the accuracy of test data is ensured, and the safety of the engine and personnel is improved.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to a clamping threaded coupling. Background Technology

[0002] Currently, conventional keyed couplings are commonly used for power testing of general-purpose gasoline and diesel engines. These couplings are rigid, simple in structure, and have a limited range of styles. They require modification to accommodate the crankshaft output end and the size of the key used in the testing machine. Furthermore, with increasing usage time, conventional couplings experience significant wear, leading to decreased fit accuracy and concentricity. In severe cases, this can cause the coupling to break during operation, resulting in engine damage and potential injury to testing personnel. Utility Model Content

[0003] The purpose of this utility model is to provide a clamping threaded coupling that has high stability, increases clamping force, has high fitting accuracy and concentricity, good stability, is not easily damaged, has a long service life, and is easy to install, versatile, economical and durable.

[0004] The key feature of the clamp-type threaded coupling is that it includes a coupling body, the connecting end of which has a tapered inner hole that is larger on the outside and smaller on the inside along the axial direction, and a chuck that is adapted to the structure of the tapered inner hole is installed in the tapered inner hole. The outer side wall of the chuck is in close contact with the inner side wall of the tapered inner hole.

[0005] A locking nut is fitted on the outer wall of the coupling body in the tapered inner bore section, and the locking nut is threadedly connected to the coupling body.

[0006] A connecting plate is installed at the fixed end of the coupling body.

[0007] The inner wall of the tapered inner hole precisely matches the tapered surface of the chuck, ensuring coaxiality and stability of the clamping. This increases the clamping force, improves the fitting accuracy and concentricity, enhances stability, reduces damage, and extends the service life by 3-4 times compared to conventional couplings. Furthermore, it is easy to install, highly versatile, economical, and durable. It eliminates concerns about key size and can meet the testing requirements of all general-purpose small gasoline and diesel engines' key output ends, thus ensuring the accuracy of test data and improving engine and personnel safety.

[0008] At the same time, the chuck is small in size, easy to replace, and readily available and inexpensive to purchase.

[0009] Furthermore, the chuck is an ER collet chuck.

[0010] Furthermore, the coupling body is an elastic body.

[0011] Furthermore, the angle of the tapered inner hole is 8°.

[0012] Furthermore, the fixed end of the coupling body is provided with a mounting disc, which is fixedly connected to the connecting disc by bolts.

[0013] Furthermore, the coupling body and the mounting disc are integrally formed.

[0014] Furthermore, the connecting plate has pin mounting holes evenly distributed around its upper circumference, and a pin is fixedly installed in each pin mounting hole.

[0015] Furthermore, the pin and the connecting plate are assembled by hot pressing.

[0016] The pin is installed in the pin mounting hole by thermal expansion and compression, so that the pin is fixedly connected to the connecting plate, ensuring that the pin has a large interference fit and preventing the pin from loosening.

[0017] Beneficial effects: This utility model can increase the clamping force, improve the fitting accuracy and concentricity, and has good stability. It is not easily damaged and its service life is 3-4 times longer than that of conventional couplings. At the same time, it is easy to install, highly versatile, economical and durable. It does not need to consider the size of the key and can meet the testing of the key output end of all general small gasoline and diesel engines, thereby ensuring the accuracy of test data and improving the safety of the engine and personnel. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the coupling body;

[0021] Figure 4 This is a front view of the coupling body. Detailed Implementation

[0022] The specific embodiments and working principle of this utility model will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 , 2 As shown, the clamp-type threaded coupling includes a coupling body 1, which is an elastic body made of high-strength 40Cr and is heat-treated by quenching and tempering to improve its hardness and wear resistance.

[0024] like Figure 3 , 4 As shown, the connecting end of the coupling body 1 has a tapered inner hole 1a with a larger outer diameter and a smaller inner diameter along the axial direction, and the angle of the tapered inner hole 1a can be 8°.

[0025] like Figure 1 , 2 As shown, a chuck 2 adapted to the structure of the conical inner hole 1a is installed inside the conical inner hole 1a. The outer side wall of the chuck 2 is precisely fitted with the inner side wall of the conical inner hole 1a to ensure coaxiality and stability of the clamping.

[0026] The above-mentioned collet 2 is an ER collet.

[0027] like Figure 1 , 2 As shown, a locking nut 3 is fitted on the outer wall of the coupling body 1 in the conical inner hole 1a section, and the locking nut 3 is threadedly connected to the coupling body 1.

[0028] like Figure 1 , 2 As shown in Figure 3, the fixed end of the coupling body 1 is provided with a mounting disc 4, which is integrally formed with the coupling body 1.

[0029] like Figure 1 , 2 As shown, the mounting disc 4 is fixed to the connecting disc 5 by bolts. The connecting disc 5 has circumferentially distributed right pin mounting holes. Each pin mounting hole is fixedly installed with a pin 6. The pin 6 is installed in the pin mounting hole by thermal expansion compression, so that the pin 6 is fixedly connected to the connecting disc 5, ensuring that the pin 6 has a large interference fit and preventing the pin 6 from loosening.

[0030] The connecting disc 5 is made of high-strength 40Cr and undergoes heat treatment quenching and tempering to improve its hardness and wear resistance.

[0031] When using the above-mentioned utility model, firstly, the ER collet is placed into the tapered inner hole 1a, and gently pushed until the outer wall of the ER collet is tightly fitted with the inner wall of the tapered inner hole 1a. Then, the locking nut 3 is fitted onto the tapered inner hole section of the coupling body 1. Next, the output end of the power crankshaft of a general-purpose small gasoline or diesel engine is inserted into the ER collet to a predetermined depth. Finally, an iron bar is used to wrench between the gaps of the pins 6, preventing the coupling body 1 and the connecting disc 5 from rotating. The ER nut is then tightened with a special wrench, forcing the ER collet to retract radially, thus achieving high-precision clamping of the crankshaft.

Claims

1. A clamp-type threaded coupling, characterized in that, The coupling body (1) includes a connecting end of the coupling body (1) having a tapered inner hole (1a) that is larger on the outside and smaller on the inside along the axial direction. A chuck (2) adapted to the structure of the tapered inner hole (1a) is installed in the tapered inner hole (1a). The outer side wall of the chuck (2) is tightly fitted with the inner side wall of the tapered inner hole (1a). A locking nut (3) is fitted on the outer wall of the coupling body (1) in the conical inner hole (1a) section, and the locking nut (3) is threadedly connected to the coupling body (1). The coupling body (1) is fitted with a connecting plate (5) at its fixed end.

2. The clamp-type threaded coupling according to claim 1, characterized in that, The chuck (2) is an ER collet chuck.

3. The clamp-type threaded coupling according to claim 1 or 2, characterized in that, The coupling body (1) is an elastic body.

4. The clamp-type threaded coupling according to claim 1 or 2, characterized in that, The angle of the conical inner hole (1a) is 8°.

5. The clamp-type threaded coupling according to claim 1, characterized in that, The fixed end of the coupling body (1) is provided with a mounting disc (4), which is fixed to the connecting disc (5) by bolts.

6. The clamp-type threaded coupling according to claim 5, characterized in that, The coupling body (1) and the mounting disc (4) are integrally formed.

7. The clamp-type threaded coupling according to claim 5, characterized in that, The connecting plate (5) has pin mounting holes evenly distributed around it, and a pin (6) is fixedly installed in each pin mounting hole.

8. The clamp-type threaded coupling according to claim 7, characterized in that, The pin (6) and the connecting plate (5) are assembled by hot pressing.

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