Manual self-locking nut pre-tightening assembly machine

Abstract

The present invention relates to a manual self-locking nut pre-compression assembly machine, comprising: an operation table; a fixed seat having a chute extending forward and backward, and a resisting member provided at the rear side of the chute; a transmission rod movably disposed on the operation table in the front-back direction, with the first end abutting against the front end of one of the nut body and the self-locking sleeve and driving this component to move backward along the chute so as to be assembled with the other component correspondingly abutted against the resisting member; a pressing rod, with the first end rotatably connected to the operation table, and during the rotation, acting on the second end of the transmission rod so as to drive the transmission rod to move backward; and an elastic member acting on the transmission rod and enabling the transmission rod to always have a tendency to rotate forward and reset. This self-locking nut pre-compression assembly machine has a simple structure and is convenient to operate. The operator only needs to place the corresponding nut body and self-locking sleeve into the chute of the fixed seat and press the pressing rod backward to complete the pre-compression assembly of the self-locking nut, which is very convenient and fast and improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of self-locking nuts, and particularly to a manual self-locking nut pre-compression assembly machine. Background Art

[0002] Self-locking nuts (also known as anti-loosening nuts or eccentric nuts) can effectively prevent loosening problems caused by vibrations and the like. For example, the Chinese utility model patent "Eccentric Self-locking Anti-loosening Nut" with the authorization announcement number CN203532477U and the Chinese utility model patent "Eccentric Self-locking Anti-loosening Nut" with the authorization announcement number CN203809476U disclose an anti-loosening nut, which includes a nut body having a main threaded hole and a self-locking sleeve having a self-locking threaded hole. The upper end surface of the nut body has an upwardly extending eccentric boss, and the central axis of the eccentric boss has an eccentric distance from the central axis of the main threaded hole. The lower end surface of the self-locking sleeve has an eccentric stop hole sleeved on the eccentric boss, and the central axis of the eccentric stop hole coincides with the central axis of the eccentric boss. There is a frictional force between the inner peripheral wall of the eccentric stop hole and the outer peripheral wall of the eccentric boss. In the initial state where the self-locking sleeve is arranged on the eccentric boss, the central axis of the self-locking threaded hole coincides with the central axis of the main threaded hole, and at the same time, there is a gap between the upper end surface of the eccentric boss and the top wall of the eccentric stop hole. In the state where the self-locking sleeve deflects by an angle relative to the eccentric boss, the central axis of the self-locking threaded hole and the central axis of the main threaded hole are offset. Due to the existence of this offset, the self-locking sleeve and the nut cylinder are firmly locked, strengthening the anti-loosening effect.

[0003] After the eccentric boss of the nut body and the eccentric stop hole of the self-locking sleeve are processed, generally, the two need to be assembled together, that is, a pre-compression operation of embedding the eccentric boss of the nut body into the eccentric stop hole of the self-locking sleeve is required, so that the self-locking nut can be packaged and transported later, or it is convenient for the user to directly assemble the self-locking nut onto the corresponding screw for fastening during subsequent use. In the existing pre-compression process of self-locking nuts, generally, the operator first aligns the eccentric boss of the nut body with the eccentric stop hole of the self-locking sleeve, and then places them on a platform, and after hitting with a hammer or other objects, the two are assembled by pre-compression. This assembly method has a large labor intensity and a low assembly efficiency, resulting in a high production cost. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a manual self-locking nut pre-compression assembly machine with high assembly efficiency and low production cost in view of the current situation of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: A manual self-locking nut pre-compression assembly machine includes:

[0006] An operating table;

[0007] The fixed seat is arranged on the operating table and has a chute that extends forward and backward for placing the nut body of the self-locking nut and the self-locking sleeve. A resisting member is provided at the rear side corresponding to the chute for resisting against one of the nut body and the self-locking sleeve.

[0008] The transmission rod is arranged on the operating table so as to be movable forward and backward. The first end of the transmission rod abuts against the front end of one of the nut body and the self-locking sleeve and drives this component to move backward along the chute so as to be assembled with the other component that abuts against the resisting member.

[0009] The pressing rod has its first end rotatably connected to the operating table, and the second end forms an operating part for the user to hold. During the rotation process, it acts on the second end of the transmission rod, thereby driving the transmission rod to move backward.

[0010] The elastic member acts on the transmission rod and makes the transmission rod always have a tendency to rotate forward and reset.

[0011] In order to fix the transmission rod and enable the transmission rod to move forward and backward stably, a positioning block is provided on the fixed seat. The positioning block has a guiding hole opened along the front-back direction, and the transmission rod is movably arranged forward and backward through the guiding hole.

[0012] In order to enable the transmission rod to automatically move forward to the initial position after moving backward to complete the pre-pressing process of the self-locking nut, a first blocking portion and a second blocking portion are arranged on the outer wall of the transmission rod at intervals along the axis. The first blocking portion abuts against the rear side edge of the guiding hole of the positioning block, and the elastic member is sleeved on the transmission rod with a spring as the main body and is located between the second blocking portion and the front side edge of the guiding hole of the positioning block.

[0013] In order to conveniently assemble the spring on the transmission rod, the second blocking portion is a nut threadedly connected to the transmission rod. Setting the second blocking portion as a nut also facilitates adjusting the compression amount of the spring so as to continue to use after adjusting when the spring force weakens, and reduces the replacement frequency of the spring.

[0014] In order to rotatably connect the pressing rod to the operating table, a supporting seat is provided on the operating table. The supporting seat has a vertical rotating shaft, and the first end of the pressing rod has a rotating shaft hole adapted to the rotating shaft.

[0015] In order to enable the pressure rod to swing stably in the horizontal direction, and then accurately act on the transmission rod to avoid upward or downward deviation, a limit pressing plate for pressing the first end of the pressure rod against the top surface of the support base is further connected to the upper end of the rotating shaft on the support base. Two flat surfaces that are respectively in contact with the top surface of the support base and the bottom surface of the limit pressing plate are provided on the first end of the pressure rod, and the rotating shaft hole correspondingly penetrates through the above two flat surfaces.

[0016] In order to facilitate the operator to hold the pressure rod for the pressing action, a strip-shaped cushion plate for placing the pressure rod is provided on the operating table. The strip-shaped cushion plate is arranged along the front-back direction of the operating sleeve, and the height of the strip-shaped cushion plate is substantially the same as the height of the support base. A stop pin for limiting the pressure rod at the front part is further provided on the strip-shaped cushion plate. The setting of the stop pin can limit the pressure rod at the front part to avoid excessive forward displacement due to the large restoring force while the transmission rod is reset by the spring.

[0017] In order to make the self-locking nut move more stably in the chute and avoid shaking or even tipping over under the action of the transmission rod, the chute is a V-shaped groove.

[0018] As an improvement, the included angle formed by the two opposite side walls of the V-shaped groove is 60°. The two opposite side walls of the V-shaped groove correspondingly support on the corresponding two side edges of the nut body and the self-locking sleeve, so that a chip-containing groove is formed in the bottom space of the V-shaped groove. Setting the included angle of the V-shaped groove to 60°, that is, the same as the included angle of the spaced side edges of the self-locking nut, can make the corresponding side edges of the nut body and the self-locking sleeve of the self-locking nut face directly upward, which is convenient for the user to identify the placement state of the nut body and the self-locking sleeve to correctly align the nut body and the self-locking sleeve and avoid errors. When the two components of the self-locking nut are placed in the V-shaped groove, the spaced side edges of the self-locking nut (nut body and self-locking sleeve) are in contact with the upper parts of the two side walls of the V-shaped groove, so that the corresponding chips will automatically fall into the chip-containing groove below. Since there are fewer chips on the upper parts of the two side walls of the V-shaped groove, the forward and backward movement of the self-locking nut is smoother, reducing scratches on the surface of the self-locking nut product and ensuring the product quality.

[0019] In order to facilitate the blowing and discharging of the chips remaining in the chip-containing groove, the chute is a through groove that penetrates from front to back.

[0020] Compared with the prior art, the advantages of the present invention are as follows: When using this self-locking nut pre-compression assembly machine to perform the pre-compression operation on the self-locking nut, the nut body and the self-locking sleeve of the self-locking nut can be directly placed in the sliding groove of the fixed seat in sequence. Then, manually hold the second end of the pressing rod and rotate it backward to drive the transmission rod to move backward and act on one of the nut body and the self-locking sleeve. Since the back side of the other component abuts against the blocking member of the fixed seat, when pressing the pressing rod forcefully, the two components can be fitted together to complete the pre-compression process. After the pressing process is completed, release the pressing rod, and the transmission rod will move forward under the action of the elastic member and drive the pressing rod to rotate forward to return to the initial position. This self-locking nut pre-compression assembly machine has a simple structure and convenient operation. The operator only needs to place the corresponding nut body and self-locking sleeve in the sliding groove of the fixed seat and press the pressing rod backward to complete the pre-compression assembly of the self-locking nut, which is very convenient and fast, effectively improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present invention;

[0022] Figure 2 is a top view of an embodiment of the present invention (when the pressing rod is in a natural state);

[0023] Figure 3 is a top view of an embodiment of the present invention (when the pressing rod is in a state of being pressed backward);

[0024] Figure 4 is an exploded view of an embodiment of the present invention;

[0025] Figure 5 is Figure 2 a cross-sectional view taken along line A-A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings.

[0027] Referring to Figures 1-5 , the manual self-locking nut pre-compression assembly machine includes an operating table 10, a fixed seat 20, a positioning block 23, a transmission rod 40, a pressing rod 50, an elastic member 60, a limiting pressing plate 13, and a strip-shaped backing plate 14.

[0028] Combined with Figure 1 and Figure 4 , the fixed seat 20 is arranged on the operating table 10. The top surface of the fixed seat 20 has a sliding groove 21 extending forward and backward. The nut body 31 and the self-locking sleeve 32 of the self-locking nut 30 can be relatively placed in the above-mentioned sliding groove 21 and slide backward along the sliding groove 21 under the drive of the transmission rod 40.

[0029] Referring to Figure 2 and Figure 5, in this embodiment, the chute 21 is a V-shaped groove, and the included angle α of the V-shaped groove is 60 degrees, which is consistent with the included angle of the side edges arranged at intervals of the self-locking nut. When the self-locking nut is placed in the V-shaped groove, the two opposite side walls of the V-shaped groove correspondingly support on the two side edges arranged at intervals of the self-locking nut, so that the movement process of the self-locking nut in the chute 21 is more stable, avoiding shaking or even tipping over under the action of the transmission rod 40.

[0030] Combined with Figure 5 , when the two components of the self-locking nut 30 are placed in the V-shaped groove, since the side edges arranged at intervals of the two components of the self-locking nut are in contact with the upper parts of the two side walls of the V-shaped groove, and the bottom space of the V-shaped groove forms a chip receiving groove 210 for receiving debris. When the self-locking nut is placed in the chute 21, the corresponding debris will automatically fall into the lower chip receiving groove 210, so that there is less debris remaining on the upper parts of the two side walls of the V-shaped groove, that is, it is not easy to hold debris at the contact position between the side wall of the V-shaped groove and the side edge of the self-locking nut, thereby making the forward and backward movement of the self-locking nut smoother, reducing scratches on the surface of the self-locking nut product, and ensuring the quality of the product.

[0031] See Figure 4 , the chute 21 is a through groove that penetrates front and back. In this way, when the debris in the chute 21 accumulates to a certain extent, it can be directly purged or wiped clean, and the debris is discharged from the two end openings of the through groove.

[0032] See Figure 1 , in order to limit the self-locking nut at the rear side so that the two components (nut body 31 and self-locking sleeve 32) of the self-locking nut can be mutually embedded under the action of the transmission rod 40 to complete the pre-compression operation, a resisting member 22 is provided at the rear part of the top surface of the fixed seat 20. The resisting member 22 is a horizontally arranged long strip-shaped block, corresponding to the rear side position of the chute 21. When the nut body 31 or the self-locking sleeve 32 of the self-locking nut moves backward to the corresponding position, it can abut against the resisting member 22.

[0033] Continue to see Figure 1 , a positioning block 23 is provided at the front part of the fixed seat 20. The positioning block 23 in this embodiment is a horizontally arranged long strip-shaped block. A guiding hole 230 that is opened front and back is provided at a position on the positioning block 23 corresponding to the chute 21 in the up and down direction. The transmission rod 40 is inserted into the guiding hole 230 and can move back and forth relative to the positioning block 23.

[0034] See Figure 2 And Figure 3A first stop 41 and a second stop 42 are spaced apart along the axial direction of the outer wall of the transmission rod 40. The first stop 41 abuts against the rear edge of the guide hole 230 of the positioning block 23. The elastic member 60 in this embodiment is a spring, which is sleeved on the transmission rod 40 and positioned between the second stop 42 and the front edge of the guide hole 230 of the positioning block 23. In this manner, the transmission rod 40 is retained in the guide hole 230 of the positioning rod by the first stop 41, the second stop 42, and the spring.

[0035] Combine Figure 4 After the transmission rod 40 moves backward to complete the pre-tightening process of the self-locking nut, it can automatically return forward to its initial position under the elastic force of the spring. In this embodiment, the second stopper 42 is a nut threaded onto the transmission rod 40. The second stopper 42 adopts a detachable nut, which facilitates the assembly operation between the transmission rod 40 and the spring, and between the transmission rod 40 and the positioning block 23. During assembly, the transmission rod 40 can be directly inserted into the guide hole 230 of the positioning block 23 from the rear side, wherein the length of the transmission rod 40 is greater than the axial length of the guide hole 230, and the second end of the transmission rod 40 will be exposed from the front side wall of the positioning block 23. The spring is then placed on the second end of the transmission rod 40. Finally, the nut serving as the second stopper 42 is placed on the second end of the transmission rod 40 to compress the spring to complete the assembly. In addition, the second stopper 42 is configured as a nut to facilitate the adjustment of the compression of the spring, so that it can be adjusted and continued to be used when the spring force weakens, reducing the frequency of spring replacement.

[0036] Continue to see Figure 4 , a support base 11 is provided on the operating table 10, and the support base 11 is located on the front side of the fixed base 20. A vertically arranged rotating shaft 12 is provided on the top surface of the support base 11. The first end of the pressure rod 50 is rotatably connected to the rotating shaft 12. Specifically, the first end of the pressure rod 50 has a rotating shaft hole 500 that is adapted to the rotating shaft 12. The upper end of the rotating shaft 12 on the support base 11 is also connected to the limiting pressure plate 13. The first end of the pressure rod 50 has two flat surfaces 52 that are respectively in contact with the top surface of the support base 11 and the bottom surface of the limiting pressure plate 13. The rotating shaft hole 500 correspondingly passes through the above two flat surfaces 52. After the first end of the pressure rod 50 is sleeved on the rotating shaft 12, the first end of the pressure rod 50 can be pressed onto the top surface of the support seat 11 through the above-mentioned limiting pressure plate 13. Since the upper and lower sides of the first end of the pressure rod 50 are flat surface 52 structures, the pressure rod 50 can swing stably in the horizontal direction, avoiding upward or downward deviation and shaking, and then accurately acting on the second end of the transmission rod 40.

[0037] The second end of the pressure rod 50 forms an operating part 51 for the user to hold. The user can hold the second end of the pressure rod 50 and press it backward. During the rotation process, the part of the pressure rod close to the first end will act on the second end of the transmission rod 40, thereby driving the transmission rod 40 to move backward.

[0038] To facilitate the operator to hold the pressure rod 50 for the pressing action, a strip-shaped cushion plate 14 for placing the pressure rod 50 is provided on the operation table 10. The strip-shaped cushion plate 14 is arranged along the front-back direction of the operation sleeve, and the height of the strip-shaped cushion plate 14 is substantially the same as the height of the support seat 11. The strip-shaped cushion plate 14 can support the pressure rod 50 upward, avoiding the increase in the rotational friction force at the first end of the pressure rod 50 due to the gravity of the second end and improving the flexibility of rotation. A retaining pin 15 for limiting the pressure rod 50 at the front part is also provided on the strip-shaped cushion plate 14. The setting of the retaining pin 15 can limit the pressure rod 50 at the front part, avoiding the forward transitional displacement due to the large restoring force while the transmission rod 40 is reset by the spring drive.

[0039] See Figure 2 and Figure 4 , to facilitate the fixation of the assembly machine at the corresponding operation station, the operation table 10 is a flat plate, and the flat plate is provided with connection holes 16. When installation and fixation are required, the assembly machine as a whole can be directly fixed at the corresponding position by passing screws or bolts through the above-mentioned connection holes 16. For details, see Figure 1 .

[0040] The usage process of the manual self-locking nut pre-pressing assembly machine in this embodiment:

[0041] When using this self-locking nut pre-pressing assembly machine to perform the pre-pressing operation of the self-locking nut, the nut body and the self-locking sleeve of the self-locking nut can be directly placed in the sliding grooves of the fixed seat in sequence. Then, manually hold the second end of the pressure rod and rotate it backward to drive the transmission rod to move backward and act on one of the nut body and the self-locking sleeve. Since the back side of the other component abuts against the retaining member of the fixed seat, when pressing the pressure rod forcefully, the two components can be fitted together to complete the pre-pressing process. After the pressing process is completed, release the pressure rod, and the transmission rod will move forward under the action of the elastic member and drive the pressure rod to rotate forward and reset to the initial position. This self-locking nut pre-pressing assembly machine has a simple structure and convenient operation. The operator only needs to place the corresponding nut body and self-locking sleeve in the sliding grooves of the fixed seat and press the pressure rod backward to complete the pre-pressing assembly of the self-locking nut, which is very convenient and fast, effectively improving the production efficiency.

Claims

1. A manual self-locking nut pre-tightening assembly machine, characterized in that Comprising: Operating table (10): Fixed seat (20), provided on the said operating table (10), having a chute (21) that extends forward and backward and is used for placing the nut body (31) of the self-locking nut (30) and the self-locking sleeve (32), and a resisting member (22) is provided corresponding to the rear side of the chute (21) for resisting against one of the nut body (31) and the self-locking sleeve (32); The said resisting member (22) is a horizontally arranged long strip-shaped block, corresponding to the rear side position of the chute (21). When the nut body (31) or the self-locking sleeve (32) of the self-locking nut moves backward to the corresponding position, it can resist against the resisting member (22); Drive rod (40), movably arranged on the said operating table (10) in the front-back direction. The first end of the drive rod (40) resists against the front end of one of the nut body (31) and the self-locking sleeve (32) and drives this component to move backward along the chute (21) so as to be assembled with the other component that correspondingly resists against the said resisting member (22); Pressure rod (50), the first end is rotatably connected to the said operating table (10), and the second end forms an operating part (51) for the user to hold. During the rotation process, it acts on the second end of the said drive rod (40), thereby driving the said drive rod (40) to move backward; Elastic member (60), acting on the said drive rod (40), and making the said drive rod (40) always have a tendency to rotate forward and reset; A positioning block (23) is provided on the said fixed seat (20), and a guiding hole (230) is opened on the positioning block (23) along the front-back direction. The drive rod (40) is movably arranged through the guiding hole (230); After the drive rod (40) moves backward to complete the pre-pressing process of the self-locking nut, under the elastic force of the spring, it automatically moves forward to the initial position; During assembly, the drive rod (40) is inserted through the guiding hole (230) of the positioning block (23) from the rear side. Among them, the length of the drive rod (40) is greater than the axial length of the guiding hole (230), and the second end of the drive rod (40) will expose the front side wall surface of the positioning block (23). Then, the spring is sleeved on the second end of the drive rod (40). Finally, the nut serving as the second blocking part (42) is sleeved on the second end of the drive rod (40) and presses the spring to complete the assembly; in addition, setting the second blocking part (42) as a nut also facilitates adjusting the compression amount of the spring to continue using when the elastic force of the spring weakens; On the outer wall of the said drive rod (40), there are a first blocking part (41) and a second blocking part (42) arranged at intervals along the axis. The first blocking part (41) resists against the rear side edge of the guiding hole (230) of the positioning block (23). The elastic member (60) is sleeved on the said drive rod (40) with a spring as the main body and is located between the second blocking part (42) and the front side edge of the guiding hole (230) of the positioning block (23); The said second blocking part (42) is a nut threadedly connected to the said drive rod (40); The operating table (10) is provided with a strip-shaped backing plate (14) for placing the pressing rod (50). The strip-shaped backing plate (14) is arranged along the front-back direction of the operating sleeve, and the height of the strip-shaped backing plate (14) is the same as that of the support seat (11). A stop pin (15) for limiting the pressing rod (50) at the front part is further provided on the strip-shaped backing plate (14). The strip-shaped backing plate (14) plays a role in upward support for the pressing rod (50), avoiding an increase in the rotational friction force at the first end of the pressing rod (50) due to the gravity of the second end. A stop pin (15) for limiting the pressing rod (50) at the front part is further provided on the strip-shaped backing plate (14). The setting of the stop pin (15) limits the pressing rod (50) at the front part, avoiding forward transitional displacement due to a large restoring force while the spring drives the transmission rod (40) to reset. The chute (21) is a V-shaped groove. The included angle (α) formed by the two opposite side walls of the V-shaped groove is 60°, which is consistent with the included angle of the spaced-apart sides of the self-locking nut. The two opposite side walls of the V-shaped groove correspondingly support on the corresponding two sides of the nut body (31) and the self-locking sleeve (32), so that a chip-receiving groove (210) is formed in the bottom space of the V-shaped groove. The chute (21) is a through groove that penetrates from front to back. When the two components of the self-locking nut (30) are placed in the V-shaped groove, since the spaced-apart sides of the two components of the self-locking nut contact the upper parts of the two side walls of the V-shaped groove, and the bottom space of the V-shaped groove forms a chip-receiving groove (210) for receiving debris. When the self-locking nut is placed in the chute (21), the corresponding debris will automatically fall into the lower chip-receiving groove (210). In this way, less debris remains on the upper parts of the two side walls of the V-shaped groove, that is, it is not easy for debris to be clamped at the contact position between the side wall of the V-shaped groove and the side of the self-locking nut.

2. The manual self-locking nut pre-tightening and assembling machine according to claim 1, wherein: The operating table (10) is provided with a support seat (11). The support seat (11) is provided with a vertically arranged rotating shaft (12). The first end of the pressing rod (50) is provided with a rotating shaft hole (500) adapted to the rotating shaft (12).

3. The manual self-locking nut pre-tightening assembly machine according to claim 2, wherein: The upper end of the rotating shaft (12) on the support seat (11) is further connected with a limiting pressing plate (13) for pressing the first end of the pressing rod (50) against the top surface of the support seat (11). The first end of the pressing rod (50) is provided with two flat surfaces (52) that respectively fit against the top surface of the support seat (11) and the bottom surface of the limiting pressing plate (13). The rotating shaft hole (500) correspondingly penetrates through the above two flat surfaces (52).

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