A nut fixing device and method for a heater installation bolt

Abstract

The present invention discloses a nut fixing device and method for heater mounting bolts. The nut fixing device includes a positioning mechanism for positioning the heater. The positioning mechanism is provided with a fixing mechanism via a transfer mechanism. The transfer mechanism assists the fixing mechanism in translation and rotation to fix the nut. The present invention fixes the assembly nut on the heater by cooperating with the positioning mechanism, the transfer mechanism and the fixing mechanism, freeing the worker's other hand so that the worker can hold the pneumatic wrench with both hands to tighten the bolt, thereby simplifying the operation, reducing labor intensity and improving production efficiency.

Description

Technical Field

[0001] The invention relates to a nut fixing device and method for heater mounting bolts. Background Art

[0002] Resistance heaters, also known as grid and manifold heaters, provide a solution for cold-starting diesel engines. They are used in on-highway vehicles, off-highway vehicles (such as construction and agricultural vehicles and machinery), and generator sets. Powered by the vehicle's own battery, the intake air heater can assist in cold-starting both on-board and off-board engines without requiring driver intervention.

[0003] In order to facilitate the assembly of the heater, it is necessary to install fixing bolts on the heater. The existing bolt tightening is done manually by holding a box end wrench or an open end wrench to fix the nut. The pneumatic wrench is held in the right hand and the wrench is held in the left hand. The torque is large when tightening, which is inconvenient to operate with one hand, high labor intensity, low production efficiency, and labor fatigue. The product is easily damaged if the wrench is not held properly by the operator. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is that the existing method of tightening fixed bolts often requires manual operation with a box end wrench or an open end wrench in one hand to fix the nut and a pneumatic wrench in the other hand to tighten, resulting in inconvenience of one-handed operation, high labor intensity and low production efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a nut fixing device for a heater mounting bolt, which includes a positioning mechanism for positioning the heater, the positioning mechanism is provided with a fixing mechanism through a transfer mechanism, and the transfer mechanism assists the fixing mechanism in translation and rotation to fix the nut.

[0007] As a preferred solution of the nut fixing device for heater mounting bolts described in the present invention, the positioning mechanism includes a base plate and a positioning jig, the positioning jig is arranged in the middle of the upper part of the base plate, and the heater is positioned on the base plate by the positioning jig so that the fixing mechanism can fix the assembly nut on the heater.

[0008] As a preferred solution of the nut fixing device for heater mounting bolts described in the present invention, the shifting mechanism includes two groups of brackets, two linear shaft seats, a shifting plate, two bearing seats and a rotating shaft, the two groups of the brackets are symmetrically arranged on both sides of the upper part of the base plate, the positioning fixture is located between the two groups of the brackets, the two linear shaft seats are respectively arranged on the two groups of the brackets, the two linear shaft seats are symmetrical to each other, the shifting plate is arranged on the linear shaft seats, and the two linear shaft seats are respectively located at the two ends of the lower part of the shifting plate, the rotating shaft is arranged on the shifting plate through the two bearing seats, the shifting plate is moved left and right on the bracket through the linear shaft seat, the rotating shaft is installed on the shifting plate through the bearing seat, and the fixing mechanism is installed on the shifting plate through the rotating shaft, so that the fixing mechanism can not only move left and right along the bracket, but also move up and down along the rotating shaft, so that the fixing mechanism can fix the nuts of the mounting bolts at different positions of the heater.

[0009] As a preferred solution of the nut fixing device for heater mounting bolts of the present invention, wherein: the bracket includes two supports and a support shaft, the two supports are arranged on one side of the upper portion of the base plate, and the support shaft is arranged on the supports;

[0010] The transfer mechanism further includes a limiting ring, which is arranged on the supporting shaft so as to limit the transfer mechanism and prevent it from colliding with the positioning mechanism during movement.

[0011] As a preferred solution of the nut fixing device for heater mounting bolts described in the present invention, wherein: the fixing mechanism includes a base, a sliding shaft, a fixed block, a first tension spring, a pulling block member, a rotating member, a limit pin and a fixed spanner, the base is arranged on the rotating shaft, the fixed block is arranged at the front end of the base through the sliding shaft, the fixed block can move relative to the base, the pulling block member is arranged at the rear end of the base through the first tension spring, the front end of the pulling block member cooperates with the rear end of the fixed block, the rotating member is arranged at the rear end of the pulling block member, the limit pin is arranged on the base to lock the base and the rotating shaft, the fixed spanner is arranged at the front end of the fixed block, the front end of the fixed spanner is provided with a plum blossom sleeve, and a nut is fitted to fix the nut.

[0012] As a preferred embodiment of the nut fixing device for heater mounting bolts of the present invention, the fixing mechanism further comprises a second tension spring, and the sliding shaft is connected to the connection between the first tension spring and the base via the second tension spring;

[0013] The pulling block member includes a slide block and a boss. The boss is arranged on the slide block for connecting to the base. The front end of the slide block is provided with a wedge-shaped groove. The rear end of the fixed block is wedge-shaped. The second tension spring and the first tension spring cooperate with each other so that the rear end of the fixed block and the front end of the slide block are embedded to form a self-locking function.

[0014] As a preferred solution of the nut fixing device for heater mounting bolts described in the present invention, the rotating part includes a screw, a bead sleeve, a steel ball, a collar and a rocker, three spherical guide grooves are evenly opened on the cylindrical surface of the screw in a circumferential direction, the bead sleeve is arranged at the front end of the screw, and three holes are evenly opened on the head of the bead sleeve in a circumferential direction, and the three holes correspond to the three spherical guide grooves. The steel ball is arranged in the hole and can roll along the spherical guide groove. The collar is arranged on the bead sleeve, a convex ball is provided at the front end of the screw, and the rocker is arranged through the rear end of the screw to facilitate the separation of the fixing wrench head from the nut.

[0015] A method for fixing a nut fixing device for a heater mounting bolt comprises the following steps:

[0016] The first step is to place the heater into the positioning fixture, move the fixing mechanism to the right until the limit ring stops, rotate the fixing mechanism, and fix the plum blossom sleeve at the front end of the wrench on the nut;

[0017] In the second step, the pneumatic wrench bit is put on the bolt and rotated, the pulling block and the fixed block are self-locked, and the nut is tightened;

[0018] The third step is to rotate the rocker, the convex ball presses against the base, the screw rotates to drive the pull block to move to the left, the pull block and the fixed block are self-locking and open, the fixed block moves, and a gap is created between the nut and the plum blossom sleeve on the fixed wrench head;

[0019] The fourth step is to lift the rocker, move the fixed spanner downward to disengage the nut, pull the fixing mechanism to the left, and the rocker will automatically rotate in the opposite direction to its original position. The fixed block and the pulling block will return to their original positions for the next use.

[0020] The beneficial effects of the present invention are: the assembly nut on the heater is fixed by the cooperation of the positioning mechanism, the transfer mechanism and the fixing mechanism, freeing the worker's other hand, so that the worker can hold the pneumatic wrench with both hands to tighten the bolts, simplifying the operation, reducing labor intensity and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0022] Figure 1 Schematic diagram of the overall structure of the nut fixing device for heater mounting bolts.

[0023] Figure 2 This is a schematic diagram of the position structure of the positioning mechanism of the nut fixing device for the heater mounting bolt.

[0024] Figure 3 This is a schematic diagram of the structure of the transfer mechanism of the nut fixing device for the heater mounting bolts.

[0025] Figure 4 The figure is a schematic diagram of the structure of the fixing mechanism of the nut fixing device for the heater mounting bolt.

[0026] Figure 5 This is a schematic structural diagram of a pull block member of a nut fixing device for mounting bolts on a heater.

[0027] Figure 6 Schematic diagram of the position structure of the rotating parts of the nut fixing device used for heater mounting bolts.

[0028] Figure 7 Schematic diagram of the position structure of the collar in the rotating part of the nut fixing device for the heater mounting bolt.

[0029] Figure 8 This is a schematic diagram of the fixing structure of the wrench and nut of the nut fixing device for the heater mounting bolt.

[0030] In the figure: 1. Positioning mechanism; 11. Positioning fixture; 12. Base plate; 2. Transfer mechanism; 21. Rotating shaft; 22. Bracket; 221. Support shaft; 222. Support; 23. Transfer plate; 24. Bearing seat; 25. Linear shaft seat; 26. Limiting ring; 3. Fixing mechanism; 31. Rotating part; 310. Ring; 311. Bead sleeve; 312. Screw; 3120. Spherical guide groove; 313. Rocker; 314. Steel ball; 32. Pull block; 321. Slide block; 322. Boss; 33. First tension spring; 34. Base; 35. Sliding shaft; 36. Fixed block; 37. Limiting pin; 38. Fixed spanner; 39. Second tension spring; 4. Heater; 41. Bolt; 42. Nut. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] Example 1

[0035] Reference Figures 1 to 8 FIG, this embodiment provides a nut fixing device for heater mounting bolts, including a positioning mechanism 1 for positioning a heater 4, wherein the positioning mechanism 1 is provided with a fixing mechanism 3 through a transfer mechanism 2, and the transfer mechanism 2 assists the fixing mechanism 3 in translation and rotation to fix the nut 42.

[0036] Specifically, the positioning mechanism 1 includes a base plate 12 and a positioning fixture 11 , and the positioning fixture 11 is disposed in the middle of the upper portion of the base plate 12 .

[0037] The positioning mechanism 1 is mainly composed of a substrate 12 and a positioning jig 11. The substrate 12 is a rectangular structure. The positioning jig 11 is installed in the middle position of the upper surface of the substrate 12. When it is necessary to install bolts 41 on the heater 4, the heater 4 is fixed to the four positioning columns on the positioning jig 11 by screws to position the entire heater 4, preventing the heater 4 from moving relative to the operator when installing the bolts 41, thereby improving work efficiency.

[0038] The transferring mechanism 2 includes two groups of brackets 22, two linear shaft seats 25, a transferring plate 23, two bearing seats 24 and a rotating shaft 21. The two groups of brackets 22 are symmetrically arranged on both sides of the upper part of the base plate 12. The positioning fixture 11 is located between the two groups of brackets 22. The two linear shaft seats 25 are respectively arranged on the two groups of brackets 22. The two linear shaft seats 25 are symmetrical to each other. The transferring plate 23 is arranged on the linear shaft seats 25. The two linear shaft seats 25 are respectively located at the two ends of the lower part of the transferring plate 23. The rotating shaft 21 is arranged on the transferring plate 23 through two bearing seats 24.

[0039] Two groups of brackets 22 are symmetrically installed on the upper and lower sides of the positioning fixture 11, and two linear shaft seats 25 are slidably installed on the two groups of brackets 22. The installation positions of the two linear shaft seats 25 are symmetrical with each other. A moving plate 23 is fixedly installed on the two linear shaft seats 25 by screws. The two linear shaft seats 25 are respectively located at the upper and lower ends of the bottom of the moving plate 23. Two bearing seats 24 are symmetrically fixedly installed at the upper and lower ends of the upper part of the moving plate 23. A rotating shaft 21 is installed on the two bearing seats 24. The moving plate 23 is moved left and right on the bracket 22 through the linear shaft seats 25. The rotating shaft 21 is installed on the moving plate 23 through the bearing seat 24. The fixing mechanism 3 is installed on the moving plate 23 through the rotating shaft 21, so that the fixing mechanism 3 can move left and right along the bracket 22 and move up and down along the rotating shaft 21, so that the fixing mechanism 3 can fix the nuts 42 of the mounting bolts 41 at different positions of the heater 4.

[0040] Furthermore, the bracket 22 includes two supports 222 and a support shaft 221 . The two supports 222 are arranged on one side of the upper part of the substrate 12 , and the support shaft 221 is arranged on the supports 222 . The transfer mechanism 2 also includes a limiting ring 26 , which is arranged on the support shaft 221 .

[0041] Each group of brackets 22 consists of two supports 222 and a support shaft 221. The two supports 222 are installed on one side of the base plate 12. The support shaft 221 is installed on the two supports 222. The linear shaft seat 25 is slidably installed on the support shaft 221. In order to prevent the entire transfer mechanism 2 from colliding with the positioning mechanism 1 and the positioning fixture 11 during movement and causing damage, a limiting ring 26 is fixedly installed on one end of any support shaft 221 close to the positioning fixture 11 to limit the linear shaft seat 25.

[0042] The fixing mechanism 3 includes a base 34, a sliding shaft 35, a fixed block 36, a first tension spring 33, a pulling block member 32, a rotating member 31, a limit pin 37 and a fixed spanner 38. The base 34 is arranged on the rotating shaft 21, the fixed block 36 is arranged at the front end of the base 34 through the sliding shaft 35, the pulling block member 32 is arranged at the rear end of the base 34 through the first tension spring 33, the front end of the pulling block member 32 cooperates with the rear end of the fixed block 36, the rotating member 31 is arranged at the rear end of the pulling block member 32, the limit pin 37 is arranged on the base 34, locking the base 34 and the rotating shaft 21, the fixed spanner 38 is arranged at the front end of the fixed block 36, and the front end of the fixed spanner 38 is provided with a plum blossom sleeve, and a nut 42 is fitted to fix the nut 42.

[0043] The base 34 serves as the installation foundation of the entire fixing mechanism 3 and is rotatably installed on the rotating shaft 21. The rear end of the fixed block 36 is installed with a sliding shaft 35. The fixed block 36 is installed at the front end of the base 34 through the sliding shaft 35. The front end of the base 34 is provided with an oblique groove that matches the sliding shaft 35. The oblique groove and the rotating shaft 21 are at an angle of 40 degrees. The sliding shaft 35 passes through the base 34 so that the fixed block 36 can move relative to the base 34. A first tension spring 33 is installed on the pull block 32. The other end of the first tension spring 33 is installed on the base 34, so that the pull block 32 has a tension toward the front end of the base 34. The movement trend is to make the front end of the pulling block 32 cooperate with the rear end of the fixed block 36 to limit the fixed block 36. The rotating member 31 is embedded in the rear end of the pulling block 32 through a stop screw, so that the pulling block 32 and the fixed block 36 can be separated from each other. A limit pin 37 is installed on the base 34. After the base 34 completes the position adjustment, the base 34 and the rotating shaft 21 are locked to prevent the base 34 from shifting during the process of fixing the nut 42. A fixed spanner 38 is fixedly installed at the front end of the fixed block 36, and a plum blossom sleeve is provided at the front end of the fixed spanner 38 to fit the nut 42 to fix the nut 42.

[0044] Furthermore, the fixing mechanism 3 also includes a second tension spring 39, and the sliding shaft 35 is connected to the connection between the first tension spring 33 and the base 34 through the second tension spring 39; the pulling block member 32 includes a slide block 321 and a boss 322, and the boss 322 is arranged on the slide block 321 for connecting to the base 34. The front end of the slide block 321 is provided with a wedge groove, and the rear end of the fixing block 36 is wedge-shaped.

[0045] The locking nut 322 is locked to the locking nut 321 by locking the cam 324 in the locking cam 326 , so that the cam 324 can be locked to the locking nut 326 at the opposite end.

[0046] The rotating member 31 includes a screw 312, a bead sleeve 311, a steel ball 314, a collar 310 and a rocker 313. Three spherical guide grooves 3120 are evenly distributed circumferentially on the cylindrical surface of the screw 312. The bead sleeve 311 is arranged at the front end of the screw 312. Three holes are evenly distributed circumferentially on the head of the bead sleeve 311. The three holes correspond to the three spherical guide grooves 3120. The steel ball 314 is arranged in the hole and can roll along the spherical guide grooves 3120. The collar 310 is arranged on the bead sleeve 311. A convex ball is provided at the front end of the screw 312. The rocker 313 is provided through the rear end of the screw 312.

[0047] Three spherical guide grooves 3120 are evenly opened on the cylindrical surface of the screw 312 in the circumferential direction. A bead sleeve 311 is set on the front end of the screw 312. The bead sleeve 311 is a step sleeve. The bead sleeve 311 is installed on the rear end of the slide block 321. Three holes are evenly opened on the bead sleeve 311 in the circumferential direction. The three holes are correspondingly connected to the three spherical guide grooves 3120. Steel balls 314 are installed in the holes. When the screw 312 rotates, the steel balls 314 can roll along the spherical guide grooves 3120 so that the screw 312 can be automatically reset by the action of the first tension spring 33. The outer side of the step 311 is provided with a collar 310 to catch the steel ball 314 and prevent it from falling. The front end of the screw rod 312 is provided with a convex ball, and the screw rod 312 is pressed against the front end of the base 34 through the convex ball. The rocker 313 is installed through the rear end of the screw rod 312 to facilitate the rotation of the screw rod 312. By rotating the rocker 313, the screw rod 312 is driven to rotate, and the screw 312 moves into the chute block 321. The chute block 321 moves away from the fixed block 36, so that the chute block 321 and the fixed block 36 are disengaged, so that the fixed wrench 38 is disengaged from the nut 42.

[0048] Example 2

[0049] Reference Figures 1 to 8 FIG. , this embodiment provides a method for fixing a nut fixing device for a heater mounting bolt, comprising the following steps:

[0050] The first step is to place the heater 4 into the positioning fixture 11 and fix the heater 4 to the four positioning posts in the positioning fixture 11 with screws. After positioning, move the fixing mechanism 3 to the right until the linear shaft seat 25 in the transfer mechanism 2 contacts the limit ring 26 and stops. Then, swing the fixing mechanism 3 up and down and move it left and right until the front end of the fixing head 38 is sleeved on the nut 42.

[0051] The second step is to put the pneumatic wrench bit on the bolt 41 and rotate it, so that the fixing block 36 and the slide block 321 are self-locking, and tighten the nut 42;

[0052] In the third step, the rocker 313 is rotated, the convex ball abuts the base 34, and the screw 312 rotates to drive the chute block 321 on the pull block 32 to move leftward. The chute block 321 and the fixed block 36 are self-locking and open, and the fixed block 36 moves relative to each other, creating a gap between the nut 42 and the plum blossom sleeve on the fixed wrench 38;

[0053] In the fourth step, lift the rocker 313, the fixed spanner 38 is disengaged from the nut 42 downward, and the fixing mechanism 3 is pulled to move to the left. The rocker 313 automatically rotates in the opposite direction to the original position, and the fixed block 36 and the pulling block 32 return to their original positions for the next use.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A nut fixing device for a heater mounting bolt, characterized in that: It comprises a positioning mechanism (1) for positioning the heater, wherein the positioning mechanism (1) is provided with a fixing mechanism (3) via a transfer mechanism (2), and the transfer mechanism (2) assists the fixing mechanism (3) in translation and rotation to fix the nut; The positioning mechanism (1) comprises a base plate (12) and a positioning jig (11), wherein the positioning jig (11) is arranged in the middle of the upper portion of the base plate (12); The transfer mechanism (2) includes two groups of brackets (22), two linear shaft seats (25), a transfer plate (23), two bearing seats (24) and a rotating shaft (21), the two groups of brackets (22) are symmetrically arranged on both sides of the upper part of the base plate (12), the positioning fixture (11) is located between the two groups of brackets (22), the two linear shaft seats (25) are respectively arranged on the two groups of brackets (22), the two linear shaft seats (25) are symmetrical to each other, the transfer plate (23) is arranged on the linear shaft seat (25), the two linear shaft seats (25) are respectively located at the two ends of the lower part of the transfer plate (23), and the rotating shaft (21) is arranged on the transfer plate (23) through the two bearing seats (24); The fixing mechanism (3) includes a base (34), a sliding shaft (35), a fixed block (36), a first tension spring (33), a pull block member (32), a rotating member (31), a limit pin (37) and a fixed spanner (38), wherein the base (34) is arranged on the rotating shaft (21), the fixed block (36) is arranged at the front end of the base (34) through the sliding shaft (35), the pull block member (32) is arranged at the rear end of the base (34) through the first tension spring (33), the front end of the pull block member (32) cooperates with the rear end of the fixed block (36), the rotating member (31) is arranged at the rear end of the pull block member (32), the limit pin (37) is arranged on the base (34) to lock the base (34) and the rotating shaft (21), the fixed spanner (38) is arranged at the front end of the fixed block (36), and the front end of the fixed spanner (38) is provided with a plum blossom sleeve.

2. The nut fixing device for heater mounting bolts according to claim 1, characterized in that: The bracket (22) comprises two supports (222) and a support shaft (221), the two supports (222) are arranged on one side of the upper portion of the substrate (12), and the support shaft (221) is arranged on the supports (222); The transfer mechanism (2) further comprises a limiting ring (26), and the limiting ring (26) is arranged on the supporting shaft (221).

3. The nut fixing device for heater mounting bolts according to claim 1, characterized in that: The fixing mechanism (3) further includes a second tension spring (39), and the sliding shaft (35) is connected to the connection between the first tension spring (33) and the base (34) via the second tension spring (39); The pull block member (32) comprises a chute block (321) and a boss (322), wherein the boss (322) is arranged on the chute block (321) and is used to connect to the base (34), a wedge-shaped groove is provided at the front end of the chute block (321), and a rear end portion of the fixed block (36) is wedge-shaped.

4. The nut fixing device for heater mounting bolts according to claim 2, wherein: The rotating member (31) includes a screw (312), a bead sleeve (311), a steel ball (314), a collar (310), and a rocker (313). Three spherical guide grooves (3120) are evenly arranged on the cylindrical surface of the screw (312). The bead sleeve (311) is arranged at the front end of the screw (312). Three holes are evenly arranged on the head of the bead sleeve (311). The three holes correspond to the three spherical guide grooves (3120). The steel ball (314) is arranged in the hole. The steel ball (314) can roll along the spherical guide grooves (3120). The collar (310) is arranged on the bead sleeve (311). A convex ball is arranged at the front end of the screw (312). The rocker (313) is arranged through the rear end of the screw (312).

5. A fixing method using the nut fixing device for heater mounting bolts according to claim 4, characterized in that: The steps include: The first step is to place the heater (4) in the positioning fixture (11), move the fixing mechanism (3) to the right until the limiting ring (26) stops, rotate the fixing mechanism (3), and fix the front end of the wrench (38) to fit the plum blossom sleeve on the nut (42); In the second step, the pneumatic wrench bit is put on the bolt (41) and rotated, the pull block (32) and the fixed block (36) are self-locked, and the nut (42) is tightened; The third step is to rotate the rocker (313), the convex ball abuts the base (34), the screw (312) rotates and drives the pull block (32) to move to the left, the pull block (32) and the fixed block (36) are self-locked and opened, the fixed block (36) moves, and a gap is generated between the nut (42) and the plum blossom sleeve on the fixed spanner (38); The fourth step is to lift the rocker (313), the fixed spanner (38) is disengaged from the nut (42) downward, the fixing mechanism (3) is pulled to move to the left, the rocker (313) automatically rotates in the opposite direction to the original position, and the fixed block (36) and the pull block (32) are restored to their original positions for the next use.

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