Forklift portal frame roller assembly assembling tool

Abstract

The invention relates to the field of forklift machinery, in particular to a forklift door frame roller assembly assembling tool which comprises a positioning plate, inner rods, outer rods, a shell, a main shaft, stirring rods, a driven shaft and a transmission module, the positioning plate is attached to the left side of a forklift outer door frame, the inner rods and the outer rods are arranged at the right end of the positioning plate in pairs, the inner rods are inserted into the forklift outer door frame, and the outer rods are inserted into the shell. The shell is located on the right side of an outer door frame of the forklift, the shell is installed on the outer rod, the main shaft is inserted into the right end of the shell, the stirring rod is installed at the right end of the main shaft, the two driven shafts are inserted into the left end of the shell, the interior of each driven shaft is hollow, the transmission module is arranged in the shell, and the transmission module is connected with the main shaft and the two driven shafts. Through magnetic positioning and spiral synchronous locking, the two bolts are synchronously aligned to the threaded holes in the outer door frame, and the purposes of improving and stabilizing the assembly precision and simplifying the assembly steps are achieved in a synchronous assembly mode.

Description

Technical Field

[0001] The invention relates to the field of forklift machinery, in particular to an assembly tool for a forklift door frame roller assembly. Background Art

[0002] The main structure of the forklift mast includes an outer mast, an inner mast and a fork frame. The mast rollers are arranged on the fork frame and the outer mast respectively, and the inner mast is located between the fork frame and the outer mast, so that the outer mast, inner mast and fork frame can slide up and down through two sets of rollers. The power applied by the chain first acts on the fork frame. After the fork frame ascends to the "free lifting height" with the help of the rollers between itself and the inner mast, it contacts the top of the inner mast. Then the fork frame drives the inner mast and continues to ascend with the help of the rollers between the inner mast and the outer mast.

[0003] Common forklift mast rollers can be divided into three categories from a structural perspective: single main rollers, split rollers and composite rollers. Single main rollers are loaded only through the main rollers, so their design requirements and processing accuracy are higher. Correspondingly, their performance is more stable, but their production costs are also higher. In composite rollers, the main rollers and lateral rollers are designed as one piece, which does not require high precision and effectively reduces costs, but has limited load-bearing capacity and is mostly used on small-tonnage forklifts. Split rollers, in which the main rollers and lateral rollers are installed independently, do not require high precision and can withstand heavy loads, so they are more common.

[0004] The use of split rollers can effectively control the manufacturing cost of forklifts while improving the capacity of forklifts to meet more working conditions. However, it is inconvenient to install, and manual installation cannot accurately and stably control the assembly accuracy of the side roller assembly. Figure 1 When assembling the side roller assembly, the operator must first put the bolts on the pad and the side roller shaft, then half-screw the bolt at one end into the threaded hole of the outer door frame, and then half-screw the bolt at the other end into the outer door frame to complete the rough assembly; in order to control the assembly accuracy of the side roller assembly (that is, the horizontality of the side roller. If the horizontality of the side roller cannot be guaranteed, it will have strong local contact with the web of the inner door frame, which will accelerate the damage to itself and the inner door frame), in the subsequent process, the operator will alternately tighten the two bolts until the two bolts are tightened. However, even so, it is difficult to ensure that the number of turns of the two bolts is equal during the manual tightening process, and the tightening process of the two bolts is not synchronized, so it cannot effectively ensure that the locking force of the two bolts is the same, that is, the horizontality of the side roller cannot be guaranteed.

[0005] In order to improve and stabilize the accuracy of manual assembly of a forklift mast side roller assembly and simplify the corresponding assembly steps, a forklift mast roller assembly assembly tool is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a forklift mast roller assembly assembly tool, which solves the problems of insufficient assembly accuracy and complicated assembly process of the forklift mast side roller assembly. Through magnetic positioning and spiral synchronous locking, the two bolts are synchronously aligned with the threaded holes on the outer mast and assembled synchronously, thereby achieving the purpose of improving and stabilizing the assembly accuracy and simplifying the assembly steps.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck, wherein the camshaft is an axially parallel roller assembly of the forklift truck

[0009] The positioning plate is positioned and adsorbed on the outer mast of the forklift by means of the plug-in cooperation between the inner rod and the threaded hole. The inner rod extending out of the threaded hole is inserted into and supports the pad and the roller in sequence. The shell is guided by the outer rod to drive the bolt in the slave shaft to move to the left. The transmission module acted by the stirring rod drives the two slave shafts to rotate synchronously and assemble the two bolts synchronously.

[0010] Preferably, the positioning plate comprises a main body, a middle groove and a magnetic attraction portion, the main body is located on the left side of the forklift outer mast, the middle groove is opened in the middle of the right side of the main body, and the height of the left wall of the middle groove is between 60 and 80 mm, the magnetic attraction portion is located at the front and rear sides of the middle groove, and the magnetic attraction portion fits the right side of the forklift outer mast;

[0011] Through the above solution, the middle groove provides sufficient installation space for the roller, and the left wall of the middle groove is used as the handhold of the positioning plate, so that the operator can easily adsorb the positioning plate on the outer mast of the forklift.

[0012] It can be seen that there are many ways to fit the positioning plate on the outer mast of a forklift, for example, by means of a spiral locking mechanism, or by arranging the magnetic attraction portion as a permanent magnet. Compared with this solution, the above solution one can press the positioning plate onto the outer mast of a forklift, but in actual operation, the inner rod is more used for positioning. If the positioning plate is supported by the inner rod, the positioning accuracy of the inner rod will be affected. Therefore, the operator must maintain stable support for the positioning plate while operating the spiral locking mechanism, so single-person operation is difficult. Even if multiple people operate, the stability of the manual support for the positioning plate is also a variable, so this method has essential defects in positioning accuracy; the above solution two, The positioning plate can be spontaneously adsorbed on the forklift outer mast by permanent magnets, without the need for manual support of the positioning plate. However, after the positioning plate is adsorbed on the forklift outer mast, the pad, lateral roller assembly and shell need to be supported by the inner rod. Therefore, a large adsorption force is required between the positioning plate and the forklift outer mast. For the setting of the permanent magnet in Solution 2, the excessive magnetic force of the positioning plate will make it difficult for the operator to operate: on the one hand, when positioning, the inner rod must be positioned in the threaded hole first, and a large force needs to be applied at this time to prevent the positioning plate from fitting with the forklift outer mast; on the other hand, the positioning plate needs to be removed after assembly, and a large force also needs to be applied at this time;

[0013] Preferably, the magnetic attraction portion is in the shape of a strip, and the length of the magnetic attraction portion in the front-to-back direction is greater than the length of the outer mast of the forklift, and the magnetic attraction portion is an electromagnet;

[0014] Through the above scheme, the magnetic attraction part is set as an electromagnet, and the presence or absence of magnetic force and the size of the magnetic force can be effectively controlled, thereby making the assembly process simpler and more efficient. The ribbed design of the magnetic attraction part can not only effectively dissipate heat, but also make the magnetic attraction part more stable in adsorbing the forklift outer mast.

[0015] When the stirring rod is turned, if the pressure to the left is close to the operator, there is an unstable pressing phenomenon, which will affect the assembly accuracy of the bolt. Therefore, the shell nested on the outer rod needs to be fixed at this time. Referring to the setting of the magnetic attraction part on the positioning plate, it can be known that although there are many ways to fix the shell on the outer rod, the setting of the electromagnet has a better effect;

[0016] Preferably, the outer rod is an electromagnet, and the outer rod is axially magnetized, and both ends of the stirring rod are permanent magnets, and the permanent magnets at both ends of the stirring rod are radially magnetized;

[0017] Through the above scheme, when the shell passes through the outer rod to move to the left, the outer rod is in a power-off state; after the shell moves to the left to the extreme position and the bolt is tightened against the threaded hole, the outer rod is energized and becomes magnetic to adsorb and fix the shell, and the stirring rod is rotated after the shell is fixed. During the rotation process, the operator can save more effort by means of the magnetization method of the outer rod and the stirring rod.

[0018] When the inner rod is inserted into the threaded hole to position the positioning plate, the support pad and the lateral roller assembly are assembled to replace manual clamping, simplifying the manual operation steps. Afterwards, when the shell moves to the left, the inner rod is gradually pushed out to the left. The thickness of the positioning plate is limited, and the support distance of the inner rod is also limited. The inner rod has a certain length due to its own support function, so the inner rod will eventually break away from the positioning plate and fall. In the process of the inner rod being squeezed out, the outer ring of the inner rod will rub against the positioning plate, resulting in the gap between the inner rod and the positioning plate gradually increasing with the increase of working time, thereby reducing the positioning accuracy of the inner rod to the positioning plate, thereby making the outer rod inaccurately positioned to the shell, and causing the bolt and the threaded hole to be unable to be aligned, thereby affecting the assembly accuracy of the bolt;

[0019] Preferably, the inner rod comprises a ring rod and a shaft rod, the ring rod is inserted into the interior of the main body, the shaft rod is inserted into the ring rod, and a guide section is provided at the right end of the ring rod, and the guide section is provided in a conical structure;

[0020] Through the above scheme, according to the "nesting principle", the shaft rod is embedded in the ring rod so that there is only a short distance of sliding between the ring rod and the main body, thereby avoiding wear between the outer ring of the ring rod and the main body, and through the extension and retraction of the shaft rod in the ring rod, the falling of the inner rod is effectively avoided, thereby eliminating the process of manual intervention.

[0021] Preferably, the guide section is embedded in the magnetic attraction portion, and clearance fit is made between the main body and the ring rod, and between the ring rod and the shaft rod, and the clearance between the main body and the ring rod is smaller than the clearance between the ring rod and the shaft rod;

[0022] Through the above scheme, the ring rod can slide normally inside the main body and the shaft rod can slide normally inside the ring rod, and the former encounters greater resistance when sliding. In addition, due to the magnetic effect of the magnetic attraction part on the guide section, the ring rod will not slide during the left movement of the shaft rod, thereby avoiding the wear between the ring rod and the main body to affect the bolt assembly accuracy.

[0023] According to the rationality of the hole-shaft matching, the diameter of the shaft is smaller than the minor diameter of the threaded hole, and the minor diameter of the threaded hole is smaller than the diameter of the light hole and the aperture of the pad. Therefore, when the pad and roller are supported by the shaft, the pad and roller will fall on the shaft, and the inner hole of the pad and the light hole are not coaxial with the shaft, but the bolt is coaxial with the inner rod. Therefore, the bolt cannot be accurately inserted into the light hole and the inner hole of the pad during the left movement;

[0024] Preferably, a guide ring is installed at the right end of the shaft rod, the outer diameter of the guide ring is between the outer diameter of the shaft rod and the minor diameter of the threaded hole, both end faces of the guide ring are chamfered, and the chamfer of the left end face of the guide ring is opened to the hollow area of ​​the guide ring, and a retaining ring is installed on the ring rod, and the minimum distance from the right end face of the retaining ring to the guide section is equal to the sum of the thickness of the main body and the magnetic attraction part;

[0025] Through the above solution, the guide ring not only has the function of guiding to make the bolts more accurately inserted into the rollers and the pads, but also can prevent the shaft rod from detaching from the inside of the ring rod, thereby avoiding the trouble of manual reassembly, thereby simplifying the operation steps.

[0026] Preferably, the transmission module comprises a main tooth and a slave tooth, the main tooth is installed at the left end of the main shaft, the two slave teeth are respectively meshed in front and rear of the main tooth, the two slave shafts are respectively inserted into the two slave teeth, and the inner contour of the slave shaft is a regular hexagon, the nut end of the bolt is inserted into the slave shaft, and the main shaft and the two slave shafts are installed with bushings;

[0027] Through the above scheme, the main shaft is used to drive the main teeth, and through the meshing of the main teeth and the two slave teeth, the two slave shafts are driven to rotate synchronously, so that the bolts inserted into the slave shafts can be screwed into the threaded holes synchronously, thereby ensuring the consistency of the assembly of the two bolts, thereby ensuring the horizontality of the roller, so as to avoid stress concentration on the belly of the roller and the inner mast, thereby reducing the risk of damage to the roller and the inner mast, and ensuring the stability and long-term operation of the forklift mast; the rotation speed of the slave shaft and the main shaft is not high, so the bushing is used as the support. Compared with the bearing, it not only makes the tooling lighter, but also makes the internal structure of the tooling more compact, and also reduces the procurement cost.

[0028] Preferably, the module of the main teeth is equal to the module of the slave teeth, so that the main teeth can be stably engaged with the two slave teeth. The number of teeth of the main teeth is greater than the number of teeth of the slave teeth. On the one hand, as a labor-saving structure, it can make it easier for the operator to rotate the stirring rod. On the other hand, it can increase the rotation speed of the slave teeth, thereby screwing the bolts into the threaded holes more quickly to accelerate the assembly speed of the lateral roller assembly. The number of teeth of the main teeth is an even number, thereby ensuring consistency in the meshing state with the two slave teeth, thereby ensuring the synchronization of the assembly of the two bolts, thereby improving the assembly accuracy of the lateral roller assembly.

[0029] Preferably, an arc groove is provided on the left side of the housing, the curvature of the arc groove is equal to the curvature of the outer ring of the roller, and the edges of the arc groove are all rounded;

[0030] Through the above scheme, when the shell moves to the left, the roller is lifted up by the arc groove, and when it reaches the extreme position, the arc groove and the roller are fully in contact, thereby ensuring the alignment of the light hole and the threaded hole, thereby ensuring the accuracy of the bolt assembly.

[0031] When the housing drives the bolt to the left to the limit position, the left end of the bolt must be pressed against the threaded hole, and the hole groove must be in full contact with the roller. It is difficult to achieve the above two goals at the same time through rigid contact.

[0032] Preferably, the slave shaft comprises a shaft body, a sliding column, a suction plate, a spring and a fixing member, the shaft body is located inside the housing, the sliding column is inserted into the shaft body, the suction plate is connected to the left side of the sliding column, and the suction plate is configured as a regular hexagonal structure, the spring is mounted on the sliding column, and the spring is located between the suction plate and the shaft body, the fixing member is mounted on one end of the sliding column extending out of the shaft body, and the suction plate is configured as a permanent magnet to absorb the nut of the bolt, thereby ensuring that the bolt does not tilt inside the slave shaft, thereby more accurately completing the assembly of the lateral roller assembly;

[0033] Through the above solution, the bolt has a buffer area inside the slave shaft, so that the threaded hole and the bolt are more accurately aligned, thereby improving the assembly accuracy of the side roller assembly.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention uses the inner rod to align the positioning plate while supporting the cushion block and the side roller assembly, thereby eliminating the rough installation steps and simplifying the assembly process. The outer rod on the positioned positioning plate is used to guide the shell, so that the two bolts placed in the shell are synchronously close to the forklift outer door frame and are synchronously screwed into the threaded holes under the action of the stirring rod, which not only eliminates the trouble of alternately screwing the two bolts to simplify the assembly process, but also ensures that the locking force of the two bolts is the same, thereby improving and stabilizing the assembly accuracy of the side roller assembly.

[0036] 2. The present invention sets the outer rod as an electromagnet, so that the outer rod can guide the shell and fix the shell by its own magnetic adsorption, thereby making the process of screwing the bolt into the threaded hole more stable, thereby improving the assembly accuracy of the side roller assembly, and the outer rod is axially magnetized, and then a magnetic force is generated with the radially magnetized stirring rod to increase the power of the stirring rod to rotate, thereby making the assembly of the side roller assembly more labor-saving.

[0037] 3. The present invention drives two identical slave teeth to rotate synchronously through the main teeth to synchronously tighten the two bolts, thereby ensuring the equality of the number of rotations of the bolts and the simultaneity of the rotations, thereby ensuring the assembly accuracy of the side roller assembly, and through the ratio of the number of teeth between the main teeth and the slave teeth, while increasing the rotation speed of the slave teeth, the force requirement of the main teeth is reduced, thereby making the assembly process more labor-saving and efficient. In addition, through the design of the even number of teeth of the main teeth, the meshing position of the main teeth and the two slave teeth can be kept symmetrical, thereby ensuring that the force applied by the main teeth on the two slave teeth is always equal, thereby improving the assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the installation of rollers between the inner and outer masts of a forklift;

[0039] Figure 2 It is a schematic diagram of the overall isometric structure of the present invention;

[0040] Figure 3 It is a schematic diagram of the overall isometric structure of the present invention from the left front perspective;

[0041] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of part A in the middle;

[0042] Figure 5 It is a schematic diagram of the internal structure of the transmission module and the slave shaft of the present invention;

[0043] Figure 6 It is a schematic diagram of the overall right side structure of the present invention;

[0044] Figure 7 It is a schematic diagram of the process of inserting the bolt into the light hole and the inner hole of the cushion block of the present invention;

[0045] Figure 8 It is a schematic diagram of the bolt locking process of the present invention.

[0046] In the figure: 1. positioning plate; 11. main body; 12. middle groove; 13. magnetic attraction part; 2. inner rod; 21. ring rod; 211. retaining ring; 22. shaft rod; 221. guide section; 222. guide ring; 3. outer rod; 4. shell; 41. arc groove; 5. main shaft; 6. stirring rod; 7. slave shaft; 71. shaft body; 72. sliding column; 73. suction plate; 74. spring; 75. fixing part; 8. transmission module; 81. main gear; 82. slave gear; 83. bushing; 14. bolt; 15. lateral roller assembly; 151. roller; 152. roller; 1521. light hole; 16. forklift outer door frame; 161. rectangular groove; 162. threaded hole; 17. pad. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figures 2 to 8 The present invention provides a forklift mast roller assembly assembly tool, and the technical solution is as follows:

[0049] A forklift mast roller assembly assembly tool, which uses bolts 14 to assemble a lateral roller assembly 15 to a forklift outer mast 16. The lateral roller assembly 15 includes a roller 151 and a roller shaft 152. Both ends of the roller shaft 152 are provided with light holes 1521. The forklift outer mast 16 is provided with a rectangular groove 161 and a threaded hole 162 that match the roller 151 and the light hole 1521. The rectangular groove 161 is provided to prevent interference between the roller 151 and the forklift outer mast 16. The two threaded holes 162 are arranged in front of the rectangular groove 161. , and the distances from the two threaded holes 162 to the rectangular groove 161 are equal. A cushion block 17 is also provided between the forklift outer mast 16 and the roller 152. The forklift outer mast 16 is welded by C-shaped steel and assembled with the inner mast welded by H-shaped steel, so that the inner mast can slide in the forklift outer mast 16 with the help of the roller 151, thereby realizing the transportation of heavy objects. The gap between the roller 151 and the web of the inner mast needs to be regulated. If the gap is too large, shaking may occur, resulting in collision between the inner and outer masts and stress concentration, thereby aggravating damage. If the distance is too small, the friction between the roller 151 and the web of the inner mast will increase, and the damage to the roller 151 and the inner mast will be aggravated. Therefore, the gap between the roller 151 and the web of the inner mast is controlled by installing the pad 17. During installation, the bolt 14 first passes through the light hole 1521, then passes through the pad 17, and then is screwed into the threaded hole 162. The positioning plate 1, inner rod 2, outer rod 3, housing 4, main shaft 5, stirring rod 6, slave shaft 7 and transmission module 8 are included. The positioning plate 1 is attached to the left side of the outer mast 16 of the forklift, and the inner rod 2 and the outer rod 3 are arranged in pairs. At the right end of the positioning plate 1, the inner rod 2 is inserted into the threaded hole 162, the housing 4 is located on the right side of the forklift outer mast 16, and the housing 4 is sleeved on the outer rod 3. An arc groove 41 is provided on the left side of the housing 4, and the curvature of the arc groove 41 is equal to the curvature of the outer ring of the roller 151. The edges of the arc groove 41 are all rounded. The main shaft 5 is inserted into the right end of the housing 4, the stirring rod 6 is installed at the right end of the main shaft 5, and the two slave shafts 7 are inserted into the left end of the housing 4, and the interior of the slave shaft 7 is hollow. The transmission module 8 is placed inside the housing 4, and the transmission module 8 connects the main shaft 5 and the two slave shafts 7;

[0050] The positioning plate 1 is positioned and adsorbed on the forklift outer door frame 16 by means of the plug-in fit between the inner rod 2 and the threaded hole 162. The inner rod 2 extending out of the threaded hole 162 is inserted into and supports the cushion block 17 and the roller 152 in turn. The shell 4 is guided by the outer rod 3 to drive the bolt 14 in the slave shaft 7 to move to the left. The transmission module 8 acted upon by the stirring rod 6 drives the two slave shafts 7 to rotate synchronously and assemble the two bolts 14 synchronously.

[0051] As an embodiment of the present invention, refer to Figure 3The positioning plate 1 includes a main body 11, a middle groove 12 and a magnetic attraction portion 13. The main body 11 is located on the left side of the forklift outer mast 16. The middle groove 12 is opened in the middle of the right side of the main body 11, and the height of the left wall of the middle groove 12 is between 60 and 80 mm. The front and rear walls of the middle groove 12 coincide with the front and rear walls of the rectangular groove 161. The magnetic attraction portion 13 is located on the front and rear sides of the middle groove 12, and the magnetic attraction portion 13 fits the right side of the forklift outer mast 16.

[0052] When a person holds the phone normally, the distance from the base of the thumb to the first knuckle of the index finger is the best holding height. Referring to the design of the width of a mobile phone, the best holding height is 68mm. When producing the positioning plate 1, the value of the left wall of the middle groove 12 can float on the basis of 68mm according to actual conditions. Generally speaking, for the consideration of connection strength, the larger the value, the better. Of course, reinforcing ribs can also be arranged separately.

[0053] As an embodiment of the present invention, refer to Figure 2 The magnetic attraction portion 13 is in the shape of a strip, and the length of the magnetic attraction portion 13 in the front-to-back direction is greater than the length of the forklift outer mast 16, the outer rod 3 and the magnetic attraction portion 13 are both electromagnets, and the outer rod 3 is axially magnetized, and the two ends of the stirring rod 6 are permanent magnets, and the permanent magnets at both ends of the stirring rod 6 are radially magnetized;

[0054] When positioning by the inner rod 2, the magnetic attraction part 13 is in a power-off state. After positioning is completed, the magnetic attraction part 13 is powered on to absorb the forklift outer mast 16. The electromagnet generates a lot of heat when working, so the magnetic attraction part 13 is set to be strip-shaped, and the magnetic attraction part 13 extends out of the forklift outer mast 16 to better guide the heat generated by the magnetic attraction part 13 from the gap between the magnetic attraction part 13 and the forklift outer mast 16. In addition, the strip-shaped design of the magnetic attraction part 13 can also reduce the contact area with the forklift outer mast 16, so that the adsorption of the magnetic attraction part 13 is more stable;

[0055] The magnetic attraction part 13 and the outer rod 3 are powered by an external power supply. The power supply lines of the magnetic attraction part 13 and the outer rod 3 are connected in parallel for independent control. The lines are connected to the inside of the main body 11, and then from the inside of the main body to the magnetic attraction part 13 and the outer rod 3 respectively. A control switch is set on the main body 11. To ensure the safety of electricity use, an insulating layer is set on the outside of the electromagnetic structure of the magnetic attraction part 13 and the outer rod 3, such as PTFE material, but attention should also be paid to the thickness of the insulating layer to avoid affecting the magnetic force of the electromagnet;

[0056] In this method, the right end of the outer rod 3 is the S pole, and the bolt 14 is generally tightened clockwise, so the rotation direction of the stirring rod 6 should be counterclockwise. Therefore, the windward side of the stirring rod 6 when rotating counterclockwise is set to the N pole, and the other side is set to the S pole. When the stirring rod 6 is close to the outer rod 3, it is subjected to the adsorption force of the outer rod 3, and when it is away from the outer rod 3, it is subjected to the repulsion force of the outer rod 3, thereby making the assembly process more labor-saving.

[0057] As an embodiment of the present invention, refer to Figure 3 and Figure 4 The inner rod 2 includes a ring rod 21 and a shaft rod 22. The ring rod 21 is inserted into the interior of the main body 11, and the shaft rod 22 is inserted into the ring rod 21. A guide section 221 is provided at the right end of the ring rod 21. The guide section 221 is set as a conical structure. A shoulder structure is provided at the left end of the shaft rod 22. A flange structure is provided inside the guide section 221 to prevent the shaft rod 22 from detaching from the right side of the ring rod 21. The guide section 221 is embedded in the magnetic attraction part 13. A clearance fit is made between the main body 11 and the ring rod 21, and between the ring rod 21 and the shaft rod 22, and the clearance between the main body 11 and the ring rod 21 is smaller than the clearance between the ring rod 21 and the shaft rod 22.

[0058] The ring rod 21 will not slide for a long distance inside the main body 11. Only after the guide section 221 is inserted into the threaded hole 162 to complete the positioning, the main body 11 will be slightly displaced during the rightward movement. Therefore, the friction between the outer ring ring and the main body 11 is weak, thereby avoiding the impact on the assembly accuracy of the bolt 14. In addition, when the shell 4 drives the bolt 14 to move to the left, the bolt 14 pushes the shaft rod 22 to move to the left, and the shaft rod 22 moving to the left slides inside the ring rod 21, thereby avoiding falling, thereby avoiding the process of manual picking and reinsertion, and simplifying the steps of manual operation.

[0059] As an embodiment of the present invention, refer to Figure 4 , a guide ring 222 is installed at the right end of the shaft rod 22. During installation, the left end of the shaft rod 22 is inserted into the ring rod 21 from the right side of the ring rod 21. After the right end of the shaft rod 22 is extended, the guide ring 222 is welded or threadedly connected to the shaft rod 22. The outer diameter of the guide ring 222 is between the outer diameter of the shaft rod 22 and the minor diameter of the threaded hole 162. Chamfers are provided at both end faces of the guide ring 222, and the chamfer of the left end face of the guide ring 222 is provided to the hollow area of ​​the guide ring 222. A retaining ring 211 is nested on the ring rod 21. The retaining ring 211 can be turned together when the ring rod 21 is processed. In order to reduce production costs, it can also be welded to the ring rod 21 afterwards. The minimum distance from the right end face of the retaining ring 211 to the guide section 221 is equal to the sum of the thicknesses of the main body 11 and the magnetic attraction portion 13;

[0060] The guide ring 222 is nested at the right end of the shaft 22, and with its large diameter, reduces the coaxiality error between the right end of the light hole 1521 and the shaft 22, so that the bolt 14 can be more accurately inserted into the light hole 1521. As the bolt 14 pushes the shaft 22 to continue to move to the left, the guide ring 222, when contacting the inner hole of the cushion block 17, lifts the cushion block 17 with the chamfer of its left end face, so as to reduce the coaxiality error between the inner hole of the cushion block 17 and the shaft 22, so that the bolt 14 can be accurately inserted into the cushion block 17. In addition to guiding the bolt 14 to be more accurately inserted into the roller 152 and the pad 17, it can also prevent the shaft rod 22 from being detached from the inside of the ring rod 21, avoiding the trouble of manual reassembly and simplifying the operation steps. When the right end face of the retaining ring 211 is in contact with the left side face of the main body 11, the guide section 221 just extends completely out of the magnetic attraction portion 13. This state is the initial state of the ring rod 21 inside the main body 11 and the magnetic attraction portion 13. During the initial adjustment, it is only necessary to pull the shaft rod 22 until it reaches the right end face of the retaining ring 211 and cannot be pulled any further.

[0061] As an embodiment of the present invention, refer to Figure 3 , Figure 5 and Figure 6 The transmission module 8 includes a main tooth 81 and a slave tooth 82. The main tooth 81 is installed at the left end of the main shaft 5. The main tooth 81 and the main shaft 5 can be processed as one piece, or the main tooth 81 and the main shaft 5 can be processed separately and then connected in a key connection manner. The following installation relationship between the slave tooth 82 and the slave shaft 7 is similar. The two slave teeth 82 are respectively meshed at the front and rear of the main tooth 81. The module of the main tooth 81 is equal to the module of the slave tooth 82. The number of teeth of the main tooth 81 is greater than the number of teeth of the slave tooth 82, and the number of teeth of the main tooth 81 is an even number. The two slave shafts 7 are respectively inserted with two slave teeth 82, and the inner contour of the slave shaft 7 is a regular hexagon. The nut end of the bolt 14 is inserted into the slave shaft 7. Shaft bushings 83 are installed on the main shaft 5 and the two slave shafts 7. The shaft bushings 83 are first axially positioned on the main shaft 5 and the slave shaft 7. The positioning can be carried out by using a shoulder plus a retaining spring or a double retaining spring. Then, the main shaft 5 and the slave shaft 7 are respectively placed in the corresponding mounting slots of the housing 4.

[0062] As an embodiment of the present invention, refer to Figure 5 , the slave shaft 7 includes a shaft body 71, a sliding column 72, a suction plate 73, a spring 74 and a fixing member 75, the shaft body 71 is located inside the housing 4, the sliding column 72 is inserted into the shaft body 71, the suction plate 73 is connected to the left side of the sliding column 72, and the suction plate 73 is set to a regular hexagonal structure, the spring 74 is installed on the sliding column 72, and the spring 74 is located between the suction plate 73 and the shaft body 71, the fixing member 75 is installed at one end of the sliding column 72 extending out of the shaft body 71, the fixing member 75 can use a nut, and accordingly, a thread is set at the right end of the sliding column 72, and the suction plate 73 is set to a permanent magnet;

[0063] When the housing 4 drives the bolt 14 to move left, the bolt 14 first presses against the threaded hole 162, and then with the help of the deformation of the spring 74, the housing 4 continues to move left, so that the arc groove 41 is in full contact with the roller 151, so that the left end of the bolt 14 can press against the threaded hole 162, and the hole groove can be in full contact with the roller 151, so that the threaded hole 162 and the bolt 14 are centered, and the bolt 14 after centering presses against the threaded hole 162, so that the assembly of the bolt 14 is completed by the rotation of the stirring rod 6.

[0064] Working principle: The assembly of the lateral roller assembly 15 is divided into two stages: first, the roller 152 must be hung on the forklift outer door frame 16, that is, rough assembly, and then the two bolts 14 must be locked, that is, fine assembly. Obviously, the fine assembly process is directly related to the assembly accuracy of the lateral roller assembly 15. Compared with the alternating screwing of the two bolts 14 in the prior art, the present invention intends to screw the two bolts 14 at the same time, so that the two bolts 14 rotate synchronously during the locking process, and the number of rotations is the same, so that the locking force of the two bolts 14 is the same, so as to stably improve the assembly accuracy of the lateral roller assembly 15; and in the prior art, when the bolt 14 is screwed into the threaded hole 162, it will bear the gravity of the pad 17 and the lateral roller assembly 15, which may easily cause the bolt 14 to be skewed, thereby affecting the assembly accuracy of the lateral roller assembly 15. For this reason, the present invention adopts the method of first positioning the bolt 14 and then screwing the bolt 14 to complete the assembly.

[0065] Specifically, in order to ensure the coaxiality of the bolt 14 and the threaded hole 162 (i.e., to position the bolt 14), refer to Figure 7 In the above figure, first insert the inner rod 2 (i.e. the ring rod 21 and the shaft rod 22) into the threaded hole 162 (similar to the role of a positioning pin);

[0066] Reference Figure 7 In the middle figure, the magnetic attraction part 13 is then energized to attract the forklift outer mast 16;

[0067] Reference Figure 2 , and then the operator releases the grip on the positioning plate 1, thereby completing the positioning of the positioning plate 1, and then sleeves the housing 4 on the outer rod 3, thereby completing the positioning of the bolt 14;

[0068] Reference Figure 2 , Figure 7 and Figure 8 As shown in the figure above, the housing 4 is then pushed to the left, so that the bolt 14 passes through the light hole 1521, the inner hole of the cushion block 17, and finally the threaded hole 162. During the process of the bolt 14 moving to the left, the shaft 22 is continuously pushed.

[0069] In order to prevent the inner rod 2 from falling off the main body 11 and to save the corresponding manual intervention steps, the inner rod 2 is designed to be telescopic by using the "nesting principle", the ring rod 21 is plugged into the main body 11, the shaft rod 22 is plugged into the ring body, and the gap between the ring body and the main body 11 is smaller than the gap between the shaft body 71 and the ring body, so as to avoid the shaft rod 22 driving the ring rod 21 when moving to the left, thereby reducing the wear of the ring rod 21 and the main body 11, so as to ensure the positioning accuracy of the positioning plate 1;

[0070] When the pad 17 and the roller 152 are suspended on the shaft 22, the light hole 1521 and the inner hole of the pad 17 are not coaxial with the threaded hole 162 and the bolt 14. In order to allow the bolt 14 to more accurately enter the light hole 1521 and the inner hole of the pad 17, a guide ring 222 is provided on the right side of the shaft 22, so as to support the shaft 22 and the pad 17 by means of the large diameter circumference of the guide ring 222, and a chamfer is provided on the left end surface of the guide ring 222 to open to the hollow area of ​​the guide ring 222, so as to facilitate the guide ring 222 to enter the inner hole of the pad 17;

[0071] After the bolt 14 is pressed against the threaded hole 162, the lateral roller assembly 15 still has a certain inclination due to the gap between the bolt 14 and the light hole 1521. In order to eliminate the above inclination and ensure the assembly accuracy, a buffer area is provided at the nut end of the bolt 14 (i.e., arranged around the spring 74), and an arc groove 41 with the same curvature as the outer ring of the roller 151 is provided on the housing 4, so that after the bolt 14 is pressed against the threaded hole 162, the housing 4 can still move to the left, and then the arc groove 41 pushes up the outer ring of the roller 151, thereby eliminating the inclination of the lateral roller 151;

[0072] Reference Figure 5 and Figure 8 In the figure below, the outer rod 3 is then energized to absorb the housing 4, and then the stirring rod 6 is rotated, and the slave teeth 82 are driven to rotate synchronously through the main teeth 81, thereby screwing the two bolts 14 into the threaded holes 162 synchronously;

[0073] During disassembly, the outer rod 3 is powered off first, then the housing 4 is removed, then the magnetic attraction portion 13 is powered off, and finally the positioning plate 1 is taken out.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forklift mast roller assembly assembly tool, which uses bolts (14) to assemble a lateral roller assembly (15) and a cushion block (17) to a forklift outer mast (16), characterized in that: The invention comprises a positioning plate (1), an inner rod (2), an outer rod (3), a shell (4), a main shaft (5), a stirring rod (6), a slave shaft (7) and a transmission module (8), wherein the positioning plate (1) is attached to the left side of a forklift outer mast (16), the inner rod (2) and the outer rod (3) are arranged in pairs at the right end of the positioning plate (1), and the inner rod (2) is inserted into the forklift outer mast (16), the shell (4) is located on the right side of the forklift outer mast (16), and the shell (4) is mounted on the outer rod (3), the main shaft (5) is inserted into the right end of the shell (4), the stirring rod (6) is mounted on the right end of the main shaft (5), the two slave shafts (7) are inserted into the left end of the shell (4), and the interior of the slave shafts (7) is hollow, and the transmission module (8) is placed inside the shell (4), and the transmission module (8) connects the main shaft (5) and the two slave shafts (7); The positioning plate (1) is positioned and adsorbed on the forklift outer mast (16) by means of the plug-in cooperation between the inner rod (2) and the forklift outer mast (16); the inner rod (2) extending out of the forklift outer mast (16) is inserted into and supports the cushion block (17) and the lateral roller assembly (15) in sequence; the housing (4) is guided by the outer rod (3) to drive the bolt (14) in the slave shaft (7) to move to the left; the transmission module (8) driven by the stirring rod (6) drives the two slave shafts (7) to rotate synchronously and assemble the two bolts (14) synchronously.

2. The forklift mast roller assembly assembly tool according to claim 1, characterized in that: The positioning plate (1) comprises a main body (11), a middle groove (12) and a magnetic attraction portion (13); the main body (11) is located on the left side of a forklift outer mast (16); the middle groove (12) is opened in the middle of the right side of the main body (11); and the height of the left wall of the middle groove (12) is between 60 and 80 mm; the magnetic attraction portion (13) is located on the front and rear sides of the middle groove (12); and the magnetic attraction portion (13) is in contact with the right side of the forklift outer mast (16).

3. The forklift mast roller assembly assembly tool according to claim 2, characterized in that: The magnetic attraction portion (13) is in the shape of a strip, and the length of the magnetic attraction portion (13) in the front-to-back direction is greater than the length of the forklift outer mast (16); the outer rod (3) and the magnetic attraction portion (13) are both electromagnets, and the outer rod (3) is axially magnetized; the two ends of the stirring rod (6) are permanent magnets, and the permanent magnets at the two ends of the stirring rod (6) are radially magnetized.

4. The forklift mast roller assembly assembly tool according to claim 2, characterized in that: The inner rod (2) comprises a ring rod (21) and a shaft rod (22); the ring rod (21) is inserted into the interior of the main body (11); the shaft rod (22) is inserted into the ring rod (21); a guide section (221) is provided at the right end of the ring rod (21); and the guide section (221) is provided as a conical structure.

5. The forklift mast roller assembly assembly tool according to claim 4, characterized in that: The guide section (221) is embedded in the magnetic attraction portion (13), and clearance fit is performed between the main body (11) and the ring rod (21), and between the ring rod (21) and the shaft rod (22), and the clearance between the main body (11) and the ring rod (21) is smaller than the clearance between the ring rod (21) and the shaft rod (22).

6. The forklift mast roller assembly assembly tool according to claim 4, characterized in that: A guide ring (222) is installed at the right end of the shaft rod (22), both end surfaces of the guide ring (222) are provided with chamfers, and the chamfer of the left end surface of the guide ring (222) is provided to the hollow area of ​​the guide ring (222), and a retaining ring (211) is installed on the ring rod (21), and the minimum distance from the right end surface of the retaining ring (211) to the guide section (221) is equal to the sum of the thicknesses of the main body (11) and the magnetic attraction portion (13).

7. The forklift mast roller assembly assembly tool according to claim 1, characterized in that: The transmission module (8) comprises a main tooth (81) and a slave tooth (82), wherein the main tooth (81) is mounted on the left end of the main shaft (5), and the two slave teeth (82) are respectively meshed at the front and rear of the main tooth (81), and the two slave shafts (7) are respectively inserted into the two slave teeth (82), and the inner contour of the slave shaft (7) is a regular hexagon, and the nut end of the bolt (14) is inserted into the slave shaft (7), and the main shaft (5) and the two slave shafts (7) are both installed with bushings (83).

8. The forklift mast roller assembly assembly tool according to claim 7, characterized in that: The module of the main teeth (81) is equal to the module of the slave teeth (82), the number of teeth of the main teeth (81) is greater than the number of teeth of the slave teeth (82), and the number of teeth of the main teeth (81) is an even number.

9. The forklift mast roller assembly assembly tool according to claim 1, characterized in that: An arc groove (41) is provided on the left side of the housing (4); the curvature of the arc groove (41) is equal to the curvature of the outer ring of the roller (151); and the edges of the arc groove (41) are all rounded.

10. The forklift mast roller assembly assembly tool according to claim 9, characterized in that: The slave shaft (7) comprises a shaft body (71), a sliding column (72), a suction plate (73), a spring (74) and a fixing member (75); the shaft body (71) is located inside the housing (4); the sliding column (72) is inserted into the shaft body (71); the suction plate (73) is connected to the left side of the sliding column (72); and the suction plate (73) is configured as a regular hexagonal structure; the spring (74) is mounted on the sliding column (72); and the spring (74) is located between the suction plate (73) and the shaft body (71); the fixing member (75) is mounted on one end of the sliding column (72) extending from the shaft body (71); and the suction plate (73) is configured as a permanent magnet.

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