Combined anti-loosening fastening structure

Abstract

The utility model discloses a combined anti-loosening fastening structure, which relates to the technical field of bolt fastening, and comprises a first fastening piece and a second fastening piece, the first fastening piece comprises a head part and a rod part, the rod part is in threaded connection with the second fastening piece, and the second fastening piece and the head part are pressed on two side walls of a workpiece to fix the workpiece; and meanwhile, the head part is buckled with the workpiece, so that the first fastener cannot rotate relative to the workpiece and is prevented from loosening. The second fastening piece is provided with a ratchet wheel assembly, the ratchet wheel assembly comprises a ratchet piece, the ratchet piece is kept protruding out of the end wall, close to the workpiece, of the second fastening piece and can be inserted into a clamping hole of the locking gasket, the locking gasket can be buckled with the workpiece, and therefore the second fastening piece can be prevented from rotating in the loosening direction, the anti-loosening effect is achieved, and the connecting stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of bolt fastening technology, and in particular to a combined anti-loosening fastening structure. Background Technology

[0002] Bolted connections are detachable connections widely used in sheet metal fastening, equipment assembly, and component connection. During equipment operation, mechanical vibrations occur. Prolonged vibrations can cause bolts to wobble, reducing the preload of the bolt connection and resulting in poor fastening. This negatively impacts the performance and stability of the machinery, particularly affecting the machining accuracy of precision equipment. Furthermore, bolts may loosen or even come loose, leading to mechanical failures. Therefore, it is necessary to develop a bolted connection structure that effectively prevents loosening. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a combined anti-loosening fastening structure, which can prevent loosening and improve the stability of the connection.

[0004] A combined anti-loosening fastening structure according to an embodiment of the present utility model is used to lock a workpiece, comprising:

[0005] A first fastener and a second fastener. The first fastener includes a head and a shank, the head of which can engage with the workpiece. The second fastener has a ratchet assembly, which includes a ratchet and an elastic element. The shank is threaded to the second fastener and presses the second fastener and the head against the two side walls of the workpiece. The elastic element keeps the ratchet protruding from the end wall of the second fastener near the workpiece. A retaining washer is provided between the workpiece and the second fastener. The retaining washer can engage with the workpiece and has multiple locking holes into which the ratchet can be inserted to prevent the second fastener from rotating in a loosening direction.

[0006] A combined anti-loosening fastening structure according to an embodiment of the present utility model has at least the following beneficial effects:

[0007] This embodiment includes a first fastener and a second fastener. The first fastener includes a head and a shank, the shank being threadedly connected to the second fastener. The second fastener and the head press against the side walls of the workpiece, thus securing the workpiece. Simultaneously, the head's engagement with the workpiece prevents the first fastener from rotating relative to the workpiece, preventing loosening. The second fastener has a ratchet that protrudes from the end wall of the second fastener near the workpiece and can be inserted into a locking washer's hole. The locking washer also engages with the workpiece, preventing the second fastener from rotating in the loosening direction, achieving an anti-loosening effect and improving the stability of the connection.

[0008] According to some embodiments of this utility model, both sides of the workpiece are provided with buckle holes, and the head and the end wall of the workpiece that abut against the stop washer are provided with bosses, which can be inserted into the buckle holes.

[0009] According to some embodiments of the present invention, the second fastener is provided with a first pin and a second pin, a ratchet is pivotally connected to the first pin, and an elastic element is wrapped around the outer periphery of the second pin.

[0010] According to some embodiments of the present invention, the workpiece is provided with a connecting hole for passing through the rod, and the buckle hole is located on the outer periphery of the connecting hole.

[0011] According to some embodiments of the present invention, an auxiliary component is also included. The auxiliary component has a connecting part and a positioning part. The positioning part has a positioning hole, and the connecting part can be inserted into the connecting hole.

[0012] According to some embodiments of this utility model, the center distance between the positioning hole and the connecting part is equal to the center distance between the buckle hole and the connecting hole.

[0013] According to some embodiments of the present invention, the ratchet is provided with a stop surface, and the stop surface is oriented toward the direction in which rotation of the second fastener can produce loosening.

[0014] According to some embodiments of the present invention, the ratchet is provided with a sliding surface, which is located on the other side of the ratchet where the stop surface is provided.

[0015] According to some embodiments of the present invention, the elastic member has a driving section that can press against the ratchet and cause the ratchet to extend toward the stop pad.

[0016] According to some embodiments of the present invention, the second fastener is provided with a mounting cavity for accommodating the elastic element and the ratchet, and the first pin and the second pin are inserted into the mounting cavity.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is an isometric view of a combined anti-loosening fastening structure in an embodiment of this utility model;

[0020] Figure 2 This is an isometric view of the connection between a combined anti-loosening fastening structure and a workpiece in an embodiment of this utility model;

[0021] Figure 3 This is a cross-sectional view of a combined anti-loosening fastening structure in an embodiment of this utility model;

[0022] Figure 4 for Figure 3 A magnified view of A in the middle;

[0023] Figure 5 This is an isometric view of the auxiliary component in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the ratchet assembly disposed within the first fastener in an embodiment of the present invention.

[0025] Figure label:

[0026] Workpiece 100; Connecting hole 101; Buckle hole 102; Stop washer 103; Locking hole 104; Auxiliary part 105; Connecting part 106; Positioning part 107; Positioning hole 108;

[0027] First fastener 110; head 111; rod 112; boss 113;

[0028] Second fastener 120; ratchet 121; drive section 122; elastic element 123; first pin 124; second pin 125; mounting cavity 126; stop surface 127; sliding surface 128; reference section 129. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 and Figure 2 This utility model discloses a combined anti-loosening fastening structure for locking two workpieces 100 that need to be fixed to each other. It includes a first fastener 110 and a second fastener 120. The first fastener 110 includes a head 111 and a rod 112 that are fixed to each other. The outer peripheral wall of the rod 112 has threads, so the rod 112 and the second fastener 120 are fixed by screwing them together, thereby achieving the second fastener 120 pressing against the two side walls of the workpiece 100 with the head 111. It is understood that the end wall of the head 111 that abuts against the workpiece 100 has a boss 113, and both side walls of the workpiece 100 have snap holes 102. The workpiece 100 has a connecting hole 101 for the rod 112 to pass through. The snap hole 102 is located on the outer periphery of the connecting hole 101. When the head 111 abuts against the workpiece 100, the boss 113 can be inserted into the snap hole 102, thereby achieving the snap-fit ​​between the head 111 and the workpiece 100 to prevent the head 111 from rotating relative to the workpiece 100.

[0034] Reference Figure 3 and Figure 4 It is understood that the second fastener 120 has a mounting cavity 126, within which a ratchet assembly is provided. The ratchet assembly includes a first pin 124, a second pin 125, a ratchet 121, and an elastic element 123. The first pin 124 and the second pin 125 are inserted into the mounting cavity 126. The ratchet 121 is pivotally connected to the first pin 124. The elastic element 123 surrounds the outer periphery of the second pin 125 and is rotatable around the second pin 125. It is understood that the elastic element 123 has a reference section 129 and a driving section 122 located on both sides of the second pin 125. The reference section 129 elastically abuts against the inner wall of the mounting cavity 126, and the driving section 122 elastically abuts against the side wall of the ratchet 121, thereby keeping the ratchet 121 protruding from the end wall of the second fastener 120 near the workpiece 100.

[0035] Understandably, a stop washer 103 is provided between the workpiece 100 and the second fastener 120. The stop washer 103 has a boss 113 on the side wall of the workpiece 100 that abuts against it, and a snap hole 102 is provided on the side wall of the workpiece 100 that contacts the stop washer 103. When the stop washer 103 abuts against the workpiece 100, the boss 113 can be inserted into the snap hole 102, thereby preventing the stop washer 103 from rotating on the surface of the workpiece 100. At the same time, the stop washer 103 has multiple locking holes 104, and the ratchet 121 can be inserted into the locking holes 104, thereby preventing the second fastener 120 from rotating in the loosening direction.

[0036] It is understandable that the shape of the buttonhole 102 includes both circular and square shapes (such as...). Figure 6 As shown), the snap hole 102 extends through both side walls of the stop washer 103. In other embodiments, the snap hole is provided on the side wall of the stop washer 103 facing away from the workpiece 100 and does not extend through the stop washer 103.

[0037] Specifically, refer to Figure 4 Along the rotation direction of the second fastener 120, the ratchet 121 includes a stop surface 127 on one side facing the tightening direction of the second fastener 120 and a sliding surface 128 on the other side. It is understood that during the tightening process of the second fastener 120, the wall surface of the stop washer 103 can push the sliding surface 128, causing the ratchet 121 to retract into the second fastener 120. When the second fastener 120 rotates and becomes loose, the end of the ratchet 121 can be inserted into the retaining hole 104, and the stop surface 127 can abut against the inner wall of the retaining hole 104. Since the stop washer 103 is engaged with the workpiece 100 at this time, it can prevent the second fastener 120 from rotating further in the loosening direction, thereby achieving an anti-loosening effect.

[0038] Reference Figure 5 It is understood that this application also includes an auxiliary component 105, which is used to form a snap hole 102 on the workpiece 100. Specifically, the auxiliary component 105 is provided with a connecting portion 106 and a positioning portion 107. The positioning portion 107 is provided with a positioning hole 108, and the connecting portion 106 can be inserted into the connecting hole 101. At the same time, the center distance between the positioning hole 108 and the connecting portion 106 is equal to the center distance between the snap hole 102 and the connecting hole 101. Therefore, when the connecting portion 106 is inserted into the connecting hole 101, the snap hole 102 can be drilled on the surface of the workpiece 100 through the positioning hole 108.

[0039] Understandably, during the installation process, the auxiliary component 105 is first used to make a snap hole 102 on the surface of the workpiece 100. Then, the head 111 is placed against the surface of the workpiece 100 and the boss 113 is inserted into the snap hole 102 to fix the first fastener 110 to the workpiece 100. Further, a stop washer 103 is inserted into the end of the rod 112 and the boss 113 of the stop washer 103 is inserted into the snap hole 102 on the other side wall of the workpiece 100. Then, the second fastener 120 is connected to the end of the rod 112 and the first fastener 110 and the second fastener 120 are continuously tightened to fix the two workpieces 100 to each other.

[0040] Reference Figure 6 In other embodiments, the ratchet assembly is disposed within the first fastener 110. Specifically, the head 111 of the first fastener 110 has a mounting cavity 126, and the elastic element 123 and the ratchet 121 are pivotally connected to the head 111 via the second pin 125 and the first pin 124, respectively. Correspondingly, a stop washer 103 is disposed between the head 111 and the workpiece 100, and the end wall of the second fastener 120 facing the head 111 has a boss 113. The stop washer 103 and the boss 113 of the second fastener 120 are respectively inserted into the snap holes 102 on the two side walls of the workpiece 100. During installation, first, the locking washer 103 and the second fastener 120 are pressed tightly against the two side walls of the workpiece 100 and the bosses 113 are inserted into the buckle holes 102. Then, the rod 112 of the first fastener 110 passes through the locking washer 103 and the connecting hole 101 and the rod 112 is threaded to the second fastener 120 to achieve a fixed connection between the two workpieces 100.

[0041] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A combined anti-loosening fastening structure for locking workpieces, characterized in that, include: A first fastener and a second fastener, wherein the first fastener includes a head and a rod, the head being capable of engaging with the workpiece; The second fastener is provided with a ratchet assembly, which includes a ratchet and an elastic element. The shank is threadedly connected to the second fastener and presses the second fastener and the head against the two side walls of the workpiece. The elastic element allows the ratchet to protrude from the end wall of the second fastener near the workpiece. A stop washer is provided between the workpiece and the second fastener. The stop washer can engage with the workpiece and has multiple locking holes. The ratchet can be inserted into the locking holes to prevent the second fastener from rotating in a loosening direction.

2. The combined anti-loosening fastening structure according to claim 1, characterized in that, Both sides of the workpiece are provided with buckle holes, and the head and the stop washer are provided with bosses that abut against the end wall of the workpiece. The bosses can be inserted into the buckle holes.

3. The combined anti-loosening fastening structure according to claim 1, characterized in that, The second fastener is provided with a first pin and a second pin, the ratchet is pivotally connected to the first pin, and the elastic element is wrapped around the outer periphery of the second pin.

4. The combined anti-loosening fastening structure according to claim 2, characterized in that, The workpiece is provided with a connecting hole for passing through the rod, and the buckle hole is located on the outer periphery of the connecting hole.

5. The combined anti-loosening fastening structure according to claim 4, characterized in that, It also includes an auxiliary component, which has a connecting part and a positioning part. The positioning part has a positioning hole, and the connecting part can be inserted into the connecting hole.

6. The combined anti-loosening fastening structure according to claim 5, characterized in that, The center distance between the positioning hole and the center of the connecting part is equal to the center distance between the buckle hole and the connecting hole.

7. The combined anti-loosening fastening structure according to claim 1, characterized in that, The ratchet has a stop surface, which is oriented toward the direction in which rotation of the second fastener can produce loosening.

8. The combined anti-loosening fastening structure according to claim 7, characterized in that, The ratchet has a sliding surface, which is located on the other side of the ratchet where the stop surface is located.

9. A combined anti-loosening fastening structure according to claim 4, characterized in that, The elastic element has a drive section that can press against the ratchet and cause the ratchet to extend toward the stop pad.

10. A combined anti-loosening fastening structure according to claim 3, characterized in that, The second fastener has a mounting cavity for accommodating the elastic element and the ratchet, and the first pin and the second pin are inserted into the mounting cavity.

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