Anti-loosening structure and electric push rod thereof

Abstract

The anti-loosening structure comprises a screw rod, a first nut, a second nut and a fixing piece, one end of the screw rod is sequentially provided with a screw rod narrow end and a screw rod main shaft, and the outer diameter of the screw rod narrow end is smaller than that of the screw rod main shaft; the screw rod is sequentially screwed into the second nut and the first nut from top to bottom; the second nut is mounted at the spindle of the screw, and the first nut is mounted at the narrow end of the screw; the thread at the narrow end of the screw is opposite to the thread of the main shaft of the screw in direction; a plurality of first through holes are fixedly formed in the first nut; a plurality of second through holes are fixedly formed in the second nut; a fixing piece penetrates through the first through hole and the second through hole, so that the first nut and the second nut are connected into a whole. According to the utility model, the left nut and the right nut are integrated through a fixing method of the double nuts and the fixing piece, so that the anti-loosening nut cannot loosen, has the advantages of simplicity in installation, high stability and the like, and can play a good anti-loosening role.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nut anti -loose technical field especially relates to a kind of anti-loose structure and electric push rod thereof. BACKGROUND

[0002] Electric push rod is also named linear driver, it is mainly by motor push rod and control device and so on mechanism composition a kind of new linear actuator, can be considered as the extension of rotary motor in structure.And there are many fastening parts in the internal structure of electric push rod, nut anti-loose is one of commonly used methods, the structure form of nut anti-loose is very much currently, many structures can play the role of anti-loose to a certain extent, but there are also respective shortcomings, double nut loosening is a commonly used screw anti-loose method, but due to the actual working condition of electric push rod, very severe working environment can exist, so that screw rod produces violent and long-lasting impact and vibration, can lead to the loosening of bearing nut on screw rod, another nut is also slowly loosened due to vibration.The anti-loose structure is provided to solve the problem that double nut is easily loosened due to impact and vibration, so that it can work more effectively for a long time, and the reliability of relevant workpieces is improved. SUMMARY

[0003] In view of the above defects of the prior art, the purpose of the utility model is to provide an anti-loose structure and electric push rod thereof.

[0004] The technical scheme of the utility model: one end of the screw rod is sequentially provided with screw rod narrow end and screw rod main shaft, and the outer diameter of the screw rod narrow end is smaller than the outer diameter of the screw rod main shaft;The screw rod is sequentially screwed into the second nut and the first nut from top to bottom;The second nut is installed at the screw rod main shaft, and the first nut is installed at the screw rod narrow end;The thread of the screw rod narrow end is opposite to the thread direction of the screw rod main shaft;A plurality of first through holes are fixedly arranged on the first nut;A plurality of second through holes are fixedly arranged on the second nut;A fixing member is arranged through the first through hole and the second through hole, so that the first nut and the second nut are connected into a whole.

[0005] Further, the fixing member is a screw.

[0006] Further, a plurality of the first through holes are distributed on the first nut with the center point of the first nut as origin at equal chord distance.

[0007] Further, a plurality of the second through holes are distributed on the second nut with the center point of the second nut as origin at equal chord distance.

[0008] Further, the number of the second through holes is more than the number of the first through holes.

[0009] Further, the centers of the first and second through holes are on the same circle in the direction of the axial projection of the screw rod.

[0010] Further, the inner diameter of the first nut is smaller than the inner diameter of the second nut.

[0011] Further, the length of the narrow end of the screw rod is longer than the height of the first nut.

[0012] An electric push rod comprises a push rod and a screw rod, and further comprises the anti-loosening structure described above; the push rod is movably mounted on the screw rod; the anti-loosening structure is arranged on the screw rod and at an end away from the push rod; and the push rod is connected with a motor through a parallel gear set.

[0013] Compared with the prior art, the electric push rod has the following beneficial effects:

[0014] 1) The method for fixing the two nuts by the double nuts and the fixing member makes the two nuts become an integral whole, and the two nuts will not be separated due to severe vibration during the operation of the electric push rod, and the electric push rod has the advantages of simple installation, high stability and the like, and can well play the anti-loosening role.

[0015] 2) The improvement on the trapezoidal structure of the end portion of the screw rod makes the installation and positioning of the nuts on the screw rod more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a whole structure schematic view of the anti-loosening structure of the utility model;

[0017] Figure 2 is a sectional structure schematic view of the anti-loosening structure of the utility model;

[0018] Figure 3 is a screw rod structure schematic view of the anti-loosening structure of the utility model;

[0019] Figure 4 is a first nut structure schematic view of the anti-loosening structure of the utility model;

[0020] Figure 5 is a second nut structure schematic view of the anti-loosening structure of the utility model;

[0021] In the drawing: 1-screw rod, 2-first nut, 3-second nut, 4-fixing member, 5-first through hole, 6-second through hole, 7-screw rod hole, 8-bearing nut, 9-narrow end of screw rod, 10-main shaft of screw rod DETAILED DESCRIPTION

[0022] The embodiments of the utility model are explained in detail below, the following embodiments are implemented on the premise of the technical scheme of the utility model, detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments.

[0023] According to Figure 1 And Figure 2 As shown in the whole structure schematic diagram and the cross section structure schematic diagram of the utility model are shown respectively, including screw rod 1, first nut 2, second nut 3, fixed part 4, first through hole 5, second through hole 6, screw rod hole 7 and bearing nut 8, bearing nut 8, second nut 3, first nut 2 are sequentially installed on screw rod 1, and first nut 1 and second nut 3 are opposite in the rotation direction of screw rod 1;Bearing nut 8 is tightly fixed on screw rod 1, and plays the role of bearing and limiting;A plurality of first through holes 5 are fixedly arranged on first nut 2;A plurality of second through holes 6 are fixedly arranged on second nut 3;Fixed part 4 is arranged through first through hole 5 and second through hole 6, so that first nut 2 and second nut 3 are connected into a whole;The inner wall of first through hole 5 and second through hole 6 is provided with thread;Fixed part 4 is screw, and first nut 2 and second nut 3 are fixed by rotating and tightening screw.

[0024] As Figure 3 The utility model discloses a kind of anti-loosening structure screw rod structure schematic diagram, including screw rod narrow end 9 and screw main shaft 7, one end of screw rod 1 is sequentially provided with screw rod narrow end 9 and screw main shaft 10, and the outer diameter of screw rod narrow end 9 is less than the outer diameter of screw main shaft 10;Second nut 3 is installed at screw main shaft 10, and first nut 2 is installed at screw rod narrow end 9;The inner diameter of first nut 2 is less than the inner diameter of second nut 3;The length of screw rod narrow end 9 is longer than the height of first nut 2;The thread of screw rod narrow end 9 and the thread trend of screw main shaft 10 are opposite;The outer diameter of the narrow end 9 is slightly small, which plays a limiting role, so that first nut 2 can only be installed at screw rod narrow end 9 and cannot enter screw main shaft 10.

[0025] As Figure 4 And Figure 5As shown, respectively show a first nut structure schematic diagram of the utility model of anti -loosening structure and the utility model of anti -loosening structure second nut structure schematic diagram, the center of the first through hole 5 and the second through hole 6 is in the same circumference in the direction of the axial projection of the screw rod 1, multiple first through hole 5 with the center point of the first nut 2 as the origin, equal chord distance is distributed on the first nut 5, multiple second through hole 6 with the center point of the second nut 3 as the origin, equal chord distance is distributed on the second nut 3, the number of the second through hole 6 is more than the number of the first through hole 5, to facilitate the fixation of the subsequent fixing piece 4. By the method of double nut and fixing piece fixation, left and right nuts become integral, so it will not loosen, has the advantages such as simple installation, stability, can play the role of anti-loosening well.

[0026] An electric push rod, comprising a push rod and the screw rod 1, further comprising the anti-loosening structure described above, the push rod is movably installed on the screw rod 1, the anti-loosening structure is arranged on the screw rod 1, and is away from the push rod at one end, and the push rod is connected with a motor through a parallel gear set.

[0027] The specific structure of the anti-loosening structure of the utility model is as follows:

[0028] In the installation of the screw rod of the electric push rod, the load-bearing nut is first fixed and installed on the screw rod, and then the second nut and the first nut are tightened in turn, the first nut needs to be installed at the narrow end of the screw rod, and the second nut needs to be installed at the main shaft of the screw rod, at this time, the hole positions of the through holes on the second nut and the first nut need to be aligned, the first through hole and the second through hole can be aligned according to the rotation of the first nut and the second nut, and after alignment, the screw is rotated and tightened, so that the screw penetrates the first nut and the second nut and becomes an integral whole, achieving the effect of fixing the two nuts on the screw rod.

[0029] The above detailed the preferred embodiments of the utility model. It should be understood that ordinary skilled in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical solution obtained by logical analysis, reasoning or limited test based on the existing technology according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A loosening prevention structure including a screw, a first nut, and a second nut, characterized by, One end of the screw rod is provided with a screw rod narrow end and a screw rod main shaft in sequence, and the outer diameter of the screw rod narrow end is smaller than that of the screw rod main shaft; the screw rod is screwed into the second nut and the first nut from top to bottom; the second nut is installed at the screw rod main shaft, and the first nut is installed at the screw rod narrow end; the thread of the screw rod narrow end is opposite to that of the screw rod main shaft; a plurality of first through holes are fixedly arranged on the first nut; a plurality of second through holes are fixedly arranged on the second nut; a fixing member is arranged through the first through holes and the second through holes, so that the first nut and the second nut are connected into an integral whole.

2. The anti-loosening structure according to claim 1, characterized by The fixing member is a screw.

3. The anti-loosening structure according to claim 1, characterized by The plurality of first through holes are distributed on the first nut at equal chord distances with the center point of the first nut as the origin.

4. The anti-loosening structure according to claim 1, characterized by The plurality of second through holes are distributed on the second nut at equal chord distances with the center point of the second nut as the origin.

5. The anti-loosening structure according to claim 1, wherein The number of the second through holes is greater than that of the first through holes.

6. The anti-loosening structure according to claim 1, characterized by The centers of the first through holes and the second through holes are on the same circle in the direction of the axial projection of the screw rod.

7. The anti-loosening structure according to Claim 1, wherein The inner diameter of the first nut is smaller than that of the second nut.

8. The anti-loosening structure according to Claim 1, wherein The length of the screw rod narrow end is greater than the height of the first nut.

9. An electric push rod comprising a push rod and a screw rod, characterized in that Further comprising the anti-loosening structure of any one of claims 1 to 8; the push rod is movably installed on the screw rod; the anti-loosening structure is arranged on the screw rod and at the end away from the push rod; and the push rod is connected with a motor through a parallel gear set.

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