TWM654135U - Assembly of nut and pin - Google Patents

Abstract

(無)

Description

Nut Latch Assembly

The invention relates to a nut latch assembly, and in particular to a nut latch assembly used for being installed on a ball pin.

In the current automobile industry, in order to enable the car to drive smoothly on the undulating ground, the relevant industry has set up a suspension system between the body and the wheels to maintain the stability of the car and reduce the vibration or impact from the ground. Generally speaking, a ball joint is provided in the suspension system to connect the tripod and the wheel. The ball pin of the known ball joint will be fixed to the desired position through a nut and a pin. The known pin is generally in a hairpin structure, and after the front end of the pin is forked through the ball pin through the nut, the front end is bent and deformed by a clamping tool, and the two deformed ends are respectively wrapped around the left and right halves of the nut, so as to limit the nut and fix it on the ball pin to prevent the nut from being ejected from the ball pin due to external force. However, when the ball joint is to be maintained or parts are to be replaced, the deformed pin is difficult to remove from the nut and cannot be reused after removal. Another new pin must be replaced to reinstall the nut on the ball pin. As a result, the user must prepare a new pin for each maintenance operation, causing inconvenience in use and increased cost.

In view of this, a nut and latch assembly that can be repeatedly installed or disassembled is still a goal that relevant industries are working towards.

The purpose of the present invention is to provide a nut and pin assembly, which can flexibly limit the connection between the nut and the ball pin through an elastic limiting portion, and the pin can be repeatedly installed or removed from the nut, thereby increasing the convenience of use and saving costs.

According to one embodiment of the present invention, a nut latch assembly is provided, which is used to be installed on a ball pin, and the nut latch assembly includes a nut and a latch member. The nut sleeve is arranged at one end of the ball pin and includes a nut body, a screw hole, a plurality of protrusions and a plurality of grooves. The screw hole penetrates the nut body and is used for the ball pin to pass through. The protrusion is protruding from an end edge of the nut body and is arranged around an axial direction of the nut body. The groove is located at the aforementioned end edge of the nut body and is arranged alternately with the protrusion. The latch member is used to limit the connection between the nut and the ball pin and includes an insertion portion and an elastic limiting portion. The insertion portion is penetrated through two opposite portions of the groove along a perforation direction, and is used to be penetrated through a perforation of the ball pin, wherein the perforation direction is perpendicular to the axial direction. The elastic limiting portion is connected to the insertion portion and is used to wrap around an outer side of the nut and flexibly limit the position of a first portion and a second portion of the protruding portion. The elastic limiting portion includes a first arc segment and a second arc segment. The first arc segment extends from one end of the insertion portion toward a first circumferential direction and is used to flexibly limit the position of the first portion of the protruding portion. The second arc segment extends from the aforementioned one end of the insertion portion toward a second circumferential direction and is used to flexibly limit the position of the second portion of the protruding portion, and the second circumferential direction is opposite to the first circumferential direction.

According to the embodiment of the nut latch assembly described in the preceding paragraph, the insertion portion may include a first straight section, a second straight section and a connecting section. One end of the first straight section is connected to one end of the first arc section and is used to be inserted into the through hole. The second straight section is parallel to the first straight section and is used to be inserted into the through hole, and one end of the second straight section is connected to one end of the second arc section. The connecting section is connected between the first straight section and the second straight section, wherein a width of the connecting section is smaller than a hole diameter of the through hole.

According to the nut latch assembly of the embodiment described in the previous paragraph, the first arc segment may have a first annular area, the first annular area forms a first clamping opening, and the second arc segment may have a second annular area, the second annular area forms a second clamping opening, and the first clamping opening and the second clamping opening are respectively used for the two ends of a clamping member to pass through.

In the nut latch assembly according to the implementation method described in the previous paragraph, the first arc segment can further include a first arc area and a second arc area, the second arc segment can further include a third arc area and a fourth arc area, the first annular area is connected between the first arc area and the second arc area, and the second annular area is connected between the third arc area and the fourth arc area, so that the first clamping opening and the second clamping opening each present an open opening.

In the nut latch assembly according to the embodiment described in the preceding paragraph, an outer surface of each protrusion away from the screw hole may have a groove, and each groove is used to accommodate one of the first arc segment and the second arc segment.

According to one embodiment of the present invention, a nut latch assembly is provided, which is used to be installed on a ball pin, and the nut latch assembly includes a nut and a latch member. The nut sleeve is arranged at one end of the ball pin and includes a nut body, a screw hole, a plurality of protrusions and a plurality of grooves. The screw hole penetrates the nut body and is used for the ball pin to pass through. The protrusion is protruding from an end edge of the nut body and is arranged around an axial direction of the nut body. The groove is located at the aforementioned end edge of the nut body and is arranged alternately with the protrusion. The latch member is used to limit the connection between the nut and the ball pin and includes an insertion portion and an elastic limiting portion. The insertion portion is penetrated through two opposite portions of the groove along a perforation direction, and is used to be penetrated through a perforation of the ball pin, wherein the perforation direction is perpendicular to the axial direction. One end of the elastic limiting portion is connected to the inserting portion, and the elastic limiting portion is used to wrap around an outer side of the nut so that the other end can be flexibly limited to one of the protruding portions.

According to the nut latch assembly of the embodiment described in the previous paragraph, the latch member may further include an extension section, which is connected between the insertion portion and the elastic limiting portion and includes a first oblique area, a second oblique area and a straight area. The first oblique area extends from the insertion portion toward a first oblique direction. The second oblique area extends from the aforementioned end of the elastic limiting portion toward a second oblique direction, wherein an oblique angle is formed between the second oblique direction and the first oblique direction. The straight area is connected between the first oblique area and the second oblique area. The first oblique area, the straight area and the second oblique area form a clamping space.

In the nut latch assembly according to the implementation method described in the previous paragraph, the elastic limiting portion may include an angled section connected to the second oblique line area, and the angled section and the second oblique line area form an angled angle.

According to the nut latch assembly of the implementation method described in the previous paragraph, the elastic limiting portion may further include a limiting straight line segment and a limiting inner hook segment, the limiting straight line segment is connected to the angle segment, the limiting inner hook segment is connected to the limiting straight line segment, the limiting inner hook segment and the limiting straight line segment form an inner hook angle, the limiting inner hook segment extends from the limiting straight line segment toward the insertion portion, and the limiting inner hook segment is used to flexibly limit to one of the aforementioned protrusions.

According to the nut latch assembly of the embodiment described in the preceding paragraph, an outer surface of each protrusion away from the screw hole may have a groove, and each groove is used to accommodate a part of the elastic limiting portion.

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 is a three-dimensional schematic diagram of a nut latch assembly 1000 installed on a ball joint structure 100 according to the first embodiment of the present invention, and FIG. 2 is an exploded schematic diagram of the nut latch assembly 1000 and the ball joint structure 100 according to the first embodiment of FIG. 1. As shown in FIG. 1 and FIG. 2, the ball joint structure 100 includes a ball pin 2000 and a ball joint assembly 3000. The ball pin 2000 is installed on the ball joint assembly 3000, and the nut latch assembly 1000 is used to be installed on the ball pin 2000. The nut latch assembly 1000 includes a nut 1100 and a latch member 1200. The nut 1100 is sleeved on one end of the ball pin 2000 and includes a nut body 1110, a screw hole 1120, a plurality of protrusions 1130 and a plurality of grooves 1140. The screw hole 1120 penetrates the nut body 1110 and is used for the ball pin 2000 to pass through. The protrusion 1130 is protruded from one end edge of the nut body 1110 and arranged around an axial direction I1 of the nut body 1110. The groove 1140 is located at the aforementioned end edge of the nut body 1110 and is arranged alternately with the protrusion 1130. The latch member 1200 is used to limit the connection between the nut 1100 and the ball pin 2000 and includes an insertion portion 1210 and an elastic limiting portion 1220. The inserting portion 1210 is penetrated in two mutually opposite portions of the groove 1140 along a penetration direction I2, and is used to be penetrated in a penetration hole 2100 of the ball pin 2000, wherein the penetration direction I2 is perpendicular to the axial direction I1. The elastic limiting portion 1220 is connected to the inserting portion 1210, and is used to wrap around an outer side of the nut 1100 and flexibly limit the first and second portions of the protruding portion 1130. The elastic limiting portion 1220 includes a first arc segment 1221 and a second arc segment 1222. The first arc segment 1221 extends from one end of the inserting portion 1210 toward a first circumferential direction R1 (indicated in FIG. 5), and is used to flexibly limit the first portion of the protruding portion 1130. The second arc segment 1222 extends from the aforementioned end of the insertion portion 1210 toward a second circumferential direction R2 (indicated in FIG. 5 ) and is used to be flexibly limited to the second portion of the protrusion 1130 . The second circumferential direction R2 is opposite to the first circumferential direction R1 .

When the components of the ball joint structure 100 need to be maintained and the nut latch assembly 1000 needs to be disassembled from the ball pin 2000, the user can use a clamping tool or a bare hand to bend the first arc segment 1221 and the second arc segment 1222 outwardly away from the nut body 1110 through the flexibility of the elastic limiting portion 1220, so that the first arc segment 1221 and the second arc segment 1222 are disengaged from the limiting position of the protrusion 1130. Then, the user can pull the insertion portion 1210 outward from the perforation 2100 along the perforation direction I2, thereby releasing the limiting position of the latch component 1200 on the nut 1100 and the ball pin 2000, and separating the nut 1100 from the ball pin 2000, making it convenient for the user to perform subsequent maintenance operations. Furthermore, after the maintenance work is completed, the user can again put the nut 1100 on the ball pin 2000, and align the insertion portion 1210 with the through hole 2100, and push the insertion portion 1210 by hand to penetrate the through hole 2100. The first arc segment 1221 and the second arc segment 1222 are bent flexibly due to the force, and the first arc segment 1221 and the second arc segment 1222 are restricted to the protrusion 1130 again by the restoring force of the first arc segment 1221 and the second arc segment 1222 themselves, so that the original latch member 1200 is restricted to connect the nut 1100 and the ball pin 2000 again. After the known latch is inserted into the through hole of the ball pin, the front fork of the latch is bent and deformed to limit the position of the nut. When the user removes the latch from the ball pin, the latch with the deformed front fork cannot be installed on the ball pin again. However, the new nut latch assembly 1000 can be repeatedly installed or removed from the ball pin 2000, thereby avoiding the situation that it can only be installed on the ball pin once and cannot be reused. Furthermore, the known latch needs to bend the front fork through a clamping tool, and the latch cannot be quickly limited to connect the nut and the ball pin. The nut latch assembly 1000 can quickly limit the latch 1200 to connect the nut 1100 and the ball pin 2000 through the flexibility of the elastic limiting portion 1220. Thereby, the convenience of assembly can be improved and the cost can be saved. The structural details of the nut latch assembly 1000 will be described in detail below.

As shown in FIG. 2 , the ball joint assembly 3000 may include a dust cover 3100 and a base 3200. The dust cover 3100 is sleeved on the base 3200, one end of the ball pin 2000 is inserted into the base 3200 and the other end of the ball pin 2000 is exposed from the dust cover 3100. The structures of the dust cover 3100 and the base 3200 are known structures in the art and are not the technical focus of this case, and their details are not described here.

Please refer to FIGS. 3 to 5, wherein FIG. 3 is a three-dimensional schematic diagram of the latch member 1200 of the nut latch assembly 1000 according to the first embodiment of FIG. 1, FIG. 4 is a partial cross-sectional schematic diagram of the nut latch assembly 1000 and the ball pin 2000 of the ball joint structure 100 according to the first embodiment of FIG. 1 along the section line 4-4, and FIG. 5 is a top view schematic diagram of the nut latch assembly 1000 installed on the ball pin 2000 according to the first embodiment of FIG. 1. As shown in FIGS. 3 to 5, the insertion portion 1210 may include a first straight section 1211, a second straight section 1212, and a connecting section 1213. One end of the first straight section 1211 is connected to one end of the first arc section 1221, and is used to be inserted into the through hole 2100. The second straight segment 1212 is parallel to the first straight segment 1211 and is used to pass through the through hole 2100. One end of the second straight segment 1212 is connected to one end of the second arc segment 1222. The connecting segment 1213 is connected between the first straight segment 1211 and the second straight segment 1212, wherein a width of the connecting segment 1213 is smaller than a hole diameter of the through hole 2100. The first straight segment 1211, the second straight segment 1212 and the connecting segment 1213 can form a U-shaped structure, and the bend of the U-shaped structure can pass through the through hole 2100. Specifically, the first straight section 1211, the second straight section 1212, the connecting section 1213, the first arc section 1221 and the second arc section 1222 are an integrally connected structure, and when the first arc section 1221 and the second arc section 1222 are flexibly bent outward, the first straight section 1211 and the second straight section 1212 are respectively driven by the first arc section 1221 and the second arc section 1222 to tilt outward with the connection point of the connecting section 1213 as a fulcrum, so that the outward bending amplitude of the first arc section 1221 and the second arc section 1222 can be further increased, thereby improving the flexibility of the elastic limiting portion 1220, thereby reducing the force required for the user to bend the first arc section 1221 and the second arc section 1222.

As shown in FIG. 3 , the first arc segment 1221 may have a first annular area 1223, which forms a first clamping opening 1225, and the second arc segment 1222 may have a second annular area 1224, which forms a second clamping opening 1226. The first clamping opening 1225 and the second clamping opening 1226 are respectively used to allow two ends of a clamping member to pass through. In other words, when manufacturing the first arc segment 1221, the first arc segment 1221 may be bent and deformed in a circular manner to form the first annular area 1223; similarly, when manufacturing the second arc segment 1222, the second annular area 1224 may be formed in a similar manner. In this way, the user can use a single clamp, such as a buckle clamp, to insert the clamp into the first clamp opening 1225 and the second clamp opening 1226, and operate the clamp to stretch the first arc segment 1221 and the second arc segment 1222 outward, thereby releasing the first arc segment 1221 and the second arc segment 1222 from limiting the protrusion 1130. In this way, the latch 1200 can be easily removed or installed from the nut 1100 and the ball pin 2000. In other embodiments, the user can use two clamps to respectively insert the first clamp opening and the second clamp opening to release the limit, but the present invention is not limited thereto.

As shown in FIG. 2, FIG. 4 and FIG. 5, an outer surface of each protrusion 1130 away from the screw hole 1120 may have a groove 1131, and each groove 1131 is used to accommodate one of the first arc segment 1221 and the second arc segment 1222. In detail, the first arc segment 1221 and the second arc segment 1222 may extend along the first circumferential direction R1 and the second circumferential direction R2 respectively to surround the annular space formed by the groove 1131 and the groove 1140, and parts of the first arc segment 1221 and the second arc segment 1222 may be accommodated in the annular space, so that the first arc segment 1221 and the second arc segment 1222 may be respectively engaged and confined in the groove 1131 of the first and second protrusions 1130.

FIG. 6 is a three-dimensional schematic diagram of a latch member 1200a of a nut latch assembly according to the second embodiment of the present invention. In the second embodiment, the structure and configuration of the nut latch assembly are similar to the structure and configuration of the nut latch assembly 1000 of the first embodiment, and are not described in detail here. In particular, the first arc segment 1220a of the latch member 1200a of the second embodiment may have a first arc section 1221a, a first annular section 1223a and a second arc section 1222a, and the second arc segment 1230a may have a third arc section 1231a, a second annular section 1233a and a fourth arc section 1232a. The first annular area 1223a is connected between the first arc area 1221a and the second arc area 1222a, and the second annular area 1233a is connected between the third arc area 1231a and the fourth arc area 1232a, so that the first clamping opening 1224a of the first annular area 1223a and the second clamping opening 1234a of the second annular area 1233a are each open. Specifically, the second arc section 1222a, the first annular section 1223a, the first arc section 1221a, the inserting portion 1210a, the third arc section 1231a, the second annular section 1233a and the fourth arc section 1232a are an integrally formed structure, and the first arc section 1220a can form the first annular section 1223a between the first arc section 1221a and the second arc section 1222a in a concave deformation manner; similarly, the second arc section 1230a can form the second annular section 1233a in a similar manner, but the present invention is not limited thereto. In this way, the difficulty of manufacturing the latch 1200a can be simplified.

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 is a three-dimensional schematic diagram of a latch member 1200b of a nut latch assembly 1000b according to the third embodiment of the present invention, and FIG. 8 is a top view schematic diagram of the nut latch assembly 1000b of the third embodiment of FIG. 7 installed on a ball pin. As shown in FIG. 7 and FIG. 8, the nut latch assembly 1000b includes a nut 1100b and a latch member 1200b. The structure and configuration of the nut 1100b and the insertion portion 1210b of the latch member 1200b are similar to the structure and configuration of the nut 1100 and the insertion portion 1210 of the first embodiment, and will not be repeated here. In particular, the structure of the elastic limiting portion 1220b is different from that of the inserting portion 1210 of the first embodiment, and is used to wrap around an outer side of the nut 1100b so that the other end can be flexibly limited to one of the protrusions 1130b. In other words, the elastic limiting portion 1220b is not divided into a first arc segment 1221 and a second arc segment 1222 as in the first embodiment.

Thus, the user can limit the elastic limiting portion 1220b to the protrusion 1130b on a single side of the nut 1100b instead of limiting the elastic limiting portion 1220 to the protrusions 1130 on both sides of the nut 1100 as in the first embodiment, and thus the function of repeated installation and removal can be achieved. The structural details of the latch 1200b will be described in detail below.

The latch member 1200b may further include an extension section 1230b, which is connected between the insertion portion 1210b and the elastic limiting portion 1220b and includes a first oblique area 1231b, a second oblique area 1232b and a straight area 1233b. The first oblique area 1231b extends from the insertion portion 1210b toward a first oblique direction. The second oblique area 1232b extends from the aforementioned end of the elastic limiting portion 1220b toward a second oblique direction, wherein an oblique angle is formed between the second oblique direction and the first oblique direction. The straight area 1233b is connected between the first oblique area 1231b and the second oblique area 1232b. The first oblique area 1231b, the straight area 1233b and the second oblique area 1232b form a clamping space. Furthermore, the inserting portion 1210b can be a long rod, the inserting portion 1210b is integrally connected to the first oblique line area 1231b, and a blunt angle is formed between the inserting portion 1210b and the first oblique line area 1231b, so that the clamping space is roughly a trapezoidal opening with an opening, and the opening faces the nut 1100b. In this way, the user can use the clamping space to flexibly bend the elastic limiting portion 1220b outward relative to the inserting portion 1210b to release the limit on the protruding portion 1130b.

The elastic limiting portion 1220b may include a folded angle section 1221b, a limiting straight line section 1222b and a limiting inner hook section 1223b. The folded angle section 1221b is connected to the second oblique line section 1232b, and the folded angle section 1221b and the second oblique line section 1232b form an angle θ1. In this way, the elastic limiting portion 1220b can be configured to match the shape of the protruding portion 1130b, but the present invention is not limited thereto.

The limiting straight line segment 1222b is connected to the angle segment 1221b, and the limiting inner hook segment 1223b is connected to the limiting straight line segment 1222b. The limiting inner hook segment 1223b and the limiting straight line segment 1222b form an inner hook angle θ2. The limiting inner hook segment 1223b extends from the limiting straight line segment 1222b toward the insertion portion 1210b. The limiting inner hook segment 1223b is used to flexibly limit the position of the aforementioned one of the protrusions 1130b. In the third embodiment, the groove of the protrusion 1130b is used to accommodate a portion of the elastic limiting portion 1220b. Specifically, the limiting straight line segment 1222b passes through the groove 1140b and is partially accommodated in the groove of the protrusion 1130b. The inner hook angle θ2 is a sharp angle, so that the limiting inner hook segment 1223b can hook one of the aforementioned protrusions 1130b at one end, thereby increasing the strength of the elastic limiting portion 1220b to limit the protrusion 1130b.

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined in the attached patent application.

100: ball joint structure 1000,1000b: nut and latch assembly 1100,1100b: nut 1110: nut body 1120: screw hole 1130,1130b: raised portion 1131: groove 1140,1140b: groove 1200,1200a,1200b: latch component 1210,1210a,1210b: insertion portion 1211: first straight section 1212: second straight section 1213: connection section 1220,1220b: elastic limiter 1221,1220a: first arc section 1221a: first arc section 1221b: angle section 1222,1230a: second arc segment 1222a: second arc area 1222b: limit straight line segment 1223,1223a: first annular area 1223b: limit inner hook segment 1224,1233a: second annular area 1225,1224a: first clamping opening 1226,1234a: second clamping opening 1230b: extension section 1231a: third arc area 1231b: first oblique area 1232a: fourth arc area 1232b: second oblique area 1233b: straight area 2000: ball pin 2100: perforation 3000: ball joint assembly 3100: dust cover 3200: base I1: Axial direction I2: Punching direction R1: First circle direction R2: Second circle direction θ1: Folding angle θ2: Inner hook angle

Figure 1 is a three-dimensional schematic diagram of a nut latch assembly installed on a ball joint structure according to the first embodiment of the present invention; Figure 2 is an exploded schematic diagram of the nut latch assembly and the ball joint structure according to the first embodiment of Figure 1; Figure 3 is a three-dimensional schematic diagram of a latch member of the nut latch assembly according to the first embodiment of Figure 1; Figure 4 is a partial cross-sectional schematic diagram of a ball pin of the nut latch assembly and the ball joint structure according to the first embodiment of Figure 1 along the section line 4-4; Figure 5 is a top view schematic diagram of the nut latch assembly installed on the ball pin according to the first embodiment of Figure 1; Figure 6 is a three-dimensional schematic diagram of a latch member of a nut latch assembly according to the second embodiment of the present invention; Figure 7 is a three-dimensional schematic diagram of a latch member of a nut latch assembly according to the third embodiment of the present invention; and Figure 8 is a top view schematic diagram of the nut latch assembly installed on a ball pin according to the third embodiment of Figure 7.

1110: Nut body

1120: screw hole

1130: Raised part

1131: Groove

1140: Groove

1200: Latch parts

1210: Insertion section

1211: The first vertical segment

1212: Second straight section

1213: Connection segment

1220: Elastic limiter

1221: First arc segment

1222: Second arc segment

2000: Ball pin

2100: Perforation

3000:Ball joint assembly

3100: Dustproof cover

3200: Base

I1: Axis direction

I2: Punching direction

Claims (10)

A nut latch assembly is used to be installed on a ball pin, and the nut latch assembly includes: A nut, which is sleeved on one end of the ball pin and includes: A nut body; A screw hole, which penetrates the nut body and is used for the ball pin to pass through; A plurality of protrusions, which are protruding from an end edge of the nut body and arranged around an axial direction of the nut body; and A plurality of grooves, which are located at the end edge of the nut body and are arranged alternately with the protrusions; and A latch member, which is used to limit the connection between the nut and the ball pin and includes: An insertion portion, which is penetrated in two opposite grooves along a perforation direction and is used to penetrate a perforation of the ball pin, wherein the perforation direction is perpendicular to the axial direction; and An elastic limiting portion is connected to the insertion portion and is used to surround an outer side of the nut and flexibly limit the position of a first and a second of the protrusions. The elastic limiting portion includes: A first arc segment extending from one end of the insertion portion toward a first circumferential direction and flexibly limit the position of the first of the protrusions; and A second arc segment extending from the end of the insertion portion toward a second circumferential direction and flexibly limit the position of the second of the protrusions, the second circumferential direction being opposite to the first circumferential direction. The nut latch assembly as described in claim 1, wherein the insertion portion comprises: a first straight section, one end of which is connected to one end of the first arc section and is used to be inserted into the through hole; a second straight section, which is parallel to the first straight section and is used to be inserted into the through hole, and one end of the second straight section is connected to one end of the second arc section; and a connecting section, which is connected between the first straight section and the second straight section, wherein a width of the connecting section is smaller than a hole diameter of the through hole. A nut latch assembly as described in claim 1, wherein the first arc segment has a first annular area, the first annular area forms a first clamping opening, the second arc segment has a second annular area, the second annular area forms a second clamping opening, the first clamping opening and the second clamping opening are respectively used for the two ends of a clamping member to pass through. A nut latch assembly as described in claim 3, wherein the first arc segment further comprises a first arc region and a second arc region, the second arc segment further comprises a third arc region and a fourth arc region, the first annular region is connected between the first arc region and the second arc region, the second annular region is connected between the third arc region and the fourth arc region, so that the first clamping opening and the second clamping opening each present an open opening. A nut latch assembly as described in claim 1, wherein each protrusion has a groove on an outer surface away from the screw hole, and each groove is used to accommodate one of the first arc segment and the second arc segment. A nut latch assembly is used to be installed on a ball pin, and the nut latch assembly includes: A nut, which is sleeved on one end of the ball pin and includes: A nut body; A screw hole, which penetrates the nut body and is used for the ball pin to pass through; A plurality of protrusions, which are protruding from an end edge of the nut body and arranged around an axial direction of the nut body; and A plurality of grooves, which are located at the end edge of the nut body and are arranged alternately with the protrusions; and A latch member, which is used to limit the connection between the nut and the ball pin and includes: An insertion portion, which is penetrated in two opposite grooves along a perforation direction and is used to penetrate a perforation of the ball pin, wherein the perforation direction is perpendicular to the axial direction; and An elastic limiting portion, one end of which is connected to the inserting portion, and the elastic limiting portion is used to wrap around an outer side of the nut so that the other end can be flexibly limited to one of the protrusions. The nut latch assembly as described in claim 6, wherein the latch further comprises an extension section, the extension section is connected between the insertion portion and the elastic limiting portion, and comprises: a first oblique area extending from the insertion portion toward a first oblique direction; a second oblique area extending from the end of the elastic limiting portion toward a second oblique direction, wherein an oblique angle is formed between the second oblique direction and the first oblique direction; and a straight area connected between the first oblique area and the second oblique area; wherein the first oblique area, the straight area and the second oblique area form a clamping space. A nut latch assembly as described in claim 7, wherein the elastic limiting portion includes a folded angle section connected to the second oblique line area, and the folded angle section and the second oblique line area form an folded angle. A nut latch assembly as described in claim 8, wherein the elastic limiting portion further includes a limiting straight line segment and a limiting inner hook segment, the limiting straight line segment is connected to the angle segment, the limiting inner hook segment is connected to the limiting straight line segment, the limiting inner hook segment and the limiting straight line segment form an inner hook angle, the limiting inner hook segment extends from the limiting straight line segment toward the insertion portion, and the limiting inner hook segment is used to flexibly limit one of the protrusions. A nut latch assembly as described in claim 6, wherein each protrusion has a groove on an outer surface away from the screw hole, and each groove is used to accommodate a portion of the elastic limiting portion.

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