Self-locking looseness-proof pipe clamp

[0018] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0019] image 3 with Figure 4 Shows a schematic structure of a preferred embodiment of the present invention, Figure 5 with Image 6 The structure of the fixing bolt 7 and the ratchet 6 is shown. As shown in the figure, the preferred embodiment includes a fixing bolt 7, an upper fixing plate 2, a supporting block 3, a lower fixing plate 4, a pawl 5, and a ratchet 6. The support block 3 is composed of two symmetrical upper and lower parts, and the middle circular hole is used to fix the pipeline (in fact, the upper and lower parts are asymmetrical, for example, recesses are formed at the edges of the upper and lower parts, respectively. When the edges are connected in parallel, the respective recesses of the upper and lower parts are combined into holes for fixing the pipeline), the lower fixing plate 4 is generally welded to the on-site supporting surface, and the fixing bolt 1 passes through the upper fixing plate 2, the supporting block 3 and Screw into the lower fixing plate 4. The ratchet 6 is located between the outer hexagonal nut of the fixing bolt 7 and the upper fixing plate 2, and the ratchet 6 and the fixing bolt 7 are fixedly connected. The ratchet 6 and the fixing bolt 7 can be welded together, or the two can be an integrated structure. Both can rotate instantly at the same time. The pawl 5 is rotatably arranged on the upper fixing plate 2 and has a rotating shaft (not marked). The pawl 5 is engaged with the ratchet wheel 6 to prevent the ratchet wheel 6 from rotating in the direction in which the fixing bolt 7 is loosened. For example, when the fixing bolt 7 is tightened, it needs to be rotated clockwise, and the pawl 5 is used to prevent the fixing bolt 7 and the ratchet wheel 6 from rotating counterclockwise.

[0020] In order to tighten the pawl 5 in real time, the preferred embodiment further includes a spring (not shown) for tightening the pawl 5. The spring is a torsion spring. Of course, in other embodiments, the spring may also be a tension spring. The torsion spring is sleeved on a rotating shaft for supporting the rotation of the pawl 5. If the spring is a tension spring, one end of the tension spring can be fixed to the upper fixing plate, and the other end can be fixed to the pawl.

[0021] In application, the spring of the preferred embodiment tightens the pawl 5 in a natural state, so that the pawl 5 and the ratchet wheel 6 can be closely attached together. In the process of tightening the fixing bolt 7, the ratchet wheel 5 rotates clockwise with the fixing bolt 7. At this time, the pawl 5 and the ratchet wheel 6 do not meet the self-locking condition, and the fixing bolt 7 rotates freely in the clockwise direction. After the tightening is completed, the pawl 5 and the ratchet 6 are closely attached. Due to the meshing between the two, the ratchet 6 cannot rotate counterclockwise, so that the fixing bolt 7 will not loosen. When disassembling, you can first separate the pawl 5 from the ratchet wheel 6 by hand, and then disassemble normally.

[0022] Figure 7 It is a schematic diagram of the inclination angle of the ratchet tooth surface of the preferred embodiment of the present invention. 2 The included angle between P), that is, the tooth surface angle, L is the pawl length, O 1 Is the pawl axis, O 2 It is the axis of the ratchet wheel, and the engagement point is P. For the sake of simplicity, set P point at the top of the ratchet tooth. When the same torque is transmitted, O 1 Located at O 2 On the vertical line of P, the pawl shaft receives the least force. When the pawl and the ratchet start to mesh at the tooth tip P, the total reaction force F of the working tooth of the ratchet facing the pawl R Relative normal reaction force F N Deflection by a friction angle φ. F N To O 1 The moment of the point makes the pawl slide into the tooth root of the ratchet wheel, and the tooth surface friction force fF N It prevents the pawl from sliding into the root of the ratchet tooth.

[0023] In order to make the pawl slide smoothly into the tooth root of the ratchet wheel and engage the tooth root tightly, 1 The moment of the point should satisfy: F N Lsinθ>fF N Lcosθ, therefore , which is

[0024] Therefore, the condition for the pawl to slide into the ratchet tooth root smoothly is: the ratchet tooth surface angle θ is greater than the friction angle Or the line of action of the ratchet wheel to the pawl total reaction force FR must be at the pawl axis O 1 And ratchet axis O 2 Pass between. When the friction coefficient of the material f=0.2, the friction angle Generally take θ=20°.

[0025] To sum up, the present invention can ensure the reliable fixation of the pipeline regardless of the vibration situation by setting the ratchet wheel and the pawl meshing with each other, and does not require frequent inspection and maintenance. It has many advantages, such as installation Easy to use, simple structure, low cost, long service life, and strong replaceability with existing pipe clamps.

[0026] It can be known from technical common sense that the present invention can be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the above-disclosed embodiments are only illustrative in all aspects, and not the only ones. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.