A zero position adjustment structure of a master controller

Abstract

The present invention relates to a zero position adjustment structure of a master controller, comprising: a fixed seat, a driving shaft, a torsion spring, a first limiter and an adjusting member, wherein the driving shaft is rotatably mounted on the fixed seat, a driving rod is arranged at the first end of the driving shaft, and the driving rod and the driving shaft are arranged at intervals; two first limiters are arranged, and the first limiters are rotatably mounted on the first end of the driving shaft, the torsion spring is sleeved on the driving shaft, and the torsion spring is located between the two first limiters; a first shift block and a second shift block are arranged on the first limiter, and the two ends of the torsion spring respectively abut against the two first shift blocks, and the driving rod is clamped between the second shift blocks of the two first limiters; the adjusting member is mounted on the fixed seat, and the adjusting member and the fixed seat are threadedly connected, and the first shift block abuts against the bottom of the adjusting member. After adopting such a scheme, the driving rod can be conveniently adjusted to make the driving shaft in the zero position, the adjustment accuracy is high, and the service life of the torsion spring will not be reduced.

Description

Technical Field

[0001] The invention relates to a zero position adjustment structure of a master controller. Background Art

[0002] At present, the master controller is widely used in the control system of engineering lifting machinery. The master controller is mainly composed of a fixed seat, an operating lever, a drive shaft, a sector gear, a bevel gear, a contact seat, a rotating shaft and a cam piece. The operating lever is installed on one of the drive shafts to drive the rotation of the drive shaft. The sector gear is installed on the drive shaft, the rotating shaft is installed on the fixed seat, the bevel gear is fixed on the rotating shaft, the bevel gear cooperates with the sector gear, the rotation of the sector gear drives the rotation of the bevel gear, the rotation of the bevel gear drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the cam piece, and the cam piece controls the on and off of the contact seat. The above is the working principle of the master controller. When the operating lever is not rotated, it is usually necessary to automatically return the drive shaft to zero position. For this purpose, a fixed plate is installed on the fixed seat, a limit piece is arranged on the fixed plate, a torsion spring is sleeved on the drive shaft, and the two ends of the torsion spring are respectively supported on both sides of the limit piece. A drive rod is arranged on the drive shaft and spaced apart from the drive shaft. The drive rod is located between the two ends of the torsion spring. When the drive shaft drives the drive rod to rotate, the drive rod drives the end of the torsion spring to twist. When the operating lever is released, the drive rod returns to its initial position under the torque of the end of the torsion spring. However, the problem with this structure is that due to errors in installation and the size of the parts themselves, the drive shaft may not be at the zero position when the drive rod returns to the initial position. Therefore, it is necessary to bend the torsion spring to change the initial angles of the two ends of the torsion spring, or to knock the limit member to change the initial position of the limit member to adjust the initial position of the drive rod so that the drive shaft is at the zero position when the drive rod is in the initial position. Such an adjustment process is relatively cumbersome, and the adjustment amount is difficult to control, and it is easy to over-adjust or under-adjust. Repeated adjustments are required, resulting in low accuracy after adjustment. In addition, bending the torsion spring will cause the torsion spring to have a shorter service life due to the stress caused by the bending. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a zero position adjustment structure of a master controller, which can conveniently adjust the drive rod to make the drive shaft at the zero position, has high adjustment accuracy, and does not reduce the service life of the torsion spring.

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] 4. The repairing kit for automotive dents, according to claim 1, wherein the two trackballs are designed to be interchangeable. The trackballs are constructed so that the two trackballs can be easily moved and retracted into place. The trackballs are constructed so that the two trackballs can be easily moved. The trackballs are constructed so that the two trackballs can be easily moved.

[0006] Preferably, a first blocking piece is provided on the first shifting block, and two ends of the torsion spring are respectively supported below the first blocking pieces of the two first limiting members.

[0007] Preferably, a shaft sleeve is arranged on the first limiting member, and the shaft sleeve is sleeved on the driving shaft.

[0008] Preferably, a fixing sleeve is provided on the fixing seat, a threaded hole is provided in the fixing sleeve, and the adjusting member is threadably fitted in the threaded hole.

[0009] Preferably, a slot is provided on the top of the adjusting member.

[0010] Preferably, a connecting block is provided on the driving shaft, the driving rod is fixed on the connecting block, and one of the first limiting members abuts against the connecting block.

[0011] Preferably: it also includes a sector-shaped tooth and a second limiting member, the sector-shaped tooth is fixed to the second end of the driving shaft, the second limiting member is fixed to the sector-shaped tooth, a second blocking piece is arranged on the second limiting member, two second blocking pieces are arranged at intervals, a limiting rod is arranged on the fixed seat, and the limiting rod is located between the two second blocking pieces.

[0012] Preferably: it also includes an operating lever, a rotating shaft, a bevel gear, a cam piece and a contact seat, the operating lever is mounted on the driving shaft, the rotating shaft is rotatably mounted on the fixed seat, the bevel gear is fixed on the top of the rotating shaft, and the bevel gear and the fan gear are meshed, the cam piece is fixed on the rotating shaft, the contact seat is mounted on the fixed seat, and the trigger switch of the contact seat cooperates with the cam piece.

[0013] The beneficial effect of the present invention is that when the driving shaft drives the driving rod to rotate, the driving rod drives the first block of the first limiting member to rotate, and the first block bends the torsion spring. When the operator does not apply force to the driving shaft, the torsion spring returns to its original position, prompting the first block to return to its original position and finally abut against the adjusting member. At this time, the second block returns to its original position, the driving rod is between the second blocks of the two first limiting members, and the driving rod is in the initial position. Therefore, in order to adjust the initial position of the driving rod, it is only necessary to rotate the adjusting member to make the adjusting member rise or fall, causing the first block to rotate, thereby causing the second block to The drive rod also rotates. Since the drive rod is between the two second shift blocks, the initial position of the drive rod is also changed accordingly. Therefore, the initial position of the drive rod can be conveniently adjusted by rotating the adjusting piece until the drive shaft is just at the zero position. Since the adjusting piece and the fixing seat are threadedly connected, the lifting and lowering amplitude of the adjusting piece is small. Therefore, the adjustment amount is easier to control, and there will be no repeated adjustments. The adjustment accuracy is high. At the same time, during the adjustment process, there is no need to bend the torsion spring, and the torsion spring is only subjected to normal torsion. The torsion spring will not change its service life due to external stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0015] Figure 1 It is a structural schematic diagram of the zero position adjustment structure of the master controller of the present invention;

[0016] Figure 2 The schematic diagram of the local structure of the zero position adjustment structure of the master controller of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 3 The local structure diagram of the zero position adjustment structure of the master controller of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 4 The schematic diagram of the local structure of the zero position adjustment structure of the master controller of the present invention is shown in FIG. Figure 3 ;

[0019] Figure 5 The local structure diagram of the zero position adjustment structure of the master controller of the present invention is shown in FIG. Figure 4 ;

[0020] Figure 6 The local structure diagram of the zero position adjustment structure of the master controller of the present invention is shown in FIG. Figure 5 ;

[0021] Figure 7 is a schematic structural diagram of a position-limiting member in an embodiment;

[0022] Figure 8Schematic diagram of the structure of the torsion spring in the embodiment;

[0023] Fig. 9 is a schematic structural diagram of a drive shaft in an embodiment;

[0024] Fig.10 Schematic diagram of the structure of the second limit member in the embodiment.

[0025] in:

[0026] 1. Fixed seat;

[0027] 2. driving shaft; 21. driving rod; 22. connecting block;

[0028] 3. Torsion spring;

[0029] 4. first position-limiting member; 41. first shifting block; 411. first stopper; 42. second shifting block; 43. shaft sleeve;

[0030] 5. Adjustment part; 51. Card slot;

[0031] 6. Fixed sleeve;

[0032] 7. Sector teeth;

[0033] 8. A second limiting member; 81. A second blocking piece;

[0034] 9. Limit rod;

[0035] 10. Operating lever;

[0036] 11. Rotating shaft;

[0037] 12. Bevel gear;

[0038] 13. Cam piece;

[0039] 14. Contact seat. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the description of the present invention, it is necessary to understand that the directions and positional relationships indicated by “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “bottom”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] like Figures 1 to 10 As shown,

[0043] Embodiment 1:

[0044] A zero position adjustment structure of a master controller comprises: a fixed seat 1, a driving shaft 2, a torsion spring 3, a first limiter 4 and an adjusting member 5, wherein the driving shaft 2 is rotatably mounted on the fixed seat 1, a driving rod 21 is arranged at the first end of the driving shaft 2, and the driving rod 21 and the driving shaft 2 are arranged at intervals; two first limiters 4 are provided, and the first limiters 4 are rotatably mounted on the first end of the driving shaft 2, the torsion spring 3 is sleeved on the driving shaft 2, and the torsion spring 3 is located between the two first limiters 4; a first shift block 41 and a second shift block 42 are arranged on the first limiter 4, and the first shift block 41 and the second shift block 42 are arranged at intervals along the circumference of the first limiter 4, and the two ends of the torsion spring 3 respectively abut on the two first shift blocks 41, and the driving rod 21 is clamped between the second shift blocks 42 of the two first limiters 4; the adjusting member 5 is installed on the fixed seat 1, and the adjusting member 5 and the fixed seat 1 are threadedly connected, and the first shift block 41 abuts on the bottom of the adjusting member 5. Specifically, a through hole is provided on the first limiter 4, and the driving shaft 2 passes through the through hole.

[0045] In this way, when the driving shaft 2 drives the driving rod 21 to rotate, the driving rod 21 drives the first block 41 of the first limiter 4 to rotate, and the first block 41 bends the torsion spring 3. When the operator does not apply force to the driving shaft 2, the torsion spring 3 returns to its original position, prompting the first block 41 to return to its original position and finally abut against the adjusting member 5. At this time, the second block 42 returns to its original position, and the driving rod 21 is between the second blocks 42 of the two first limiters 4, and the driving rod 21 is in the initial position. Therefore, in order to adjust the initial position of the driving rod 21, it is only necessary to rotate the adjusting member 5 to make the adjusting member 5 rise or fall, causing the first block 41 to rotate, thereby making the adjusting member 5 rise or fall. The second shift block 42 also rotates. Since the driving rod 21 is between the two second shift blocks 42, the initial position of the driving rod 21 is also changed accordingly. Therefore, the initial position of the driving rod 21 can be easily adjusted by rotating the adjusting member 5 until the driving shaft 2 is just at the zero position. Since the adjusting member 5 is threadedly connected to the fixing seat 1, the lifting and lowering amplitude of the adjusting member 5 is small. Therefore, the adjustment amount is easier to control, and there will be no repeated adjustments. The adjustment accuracy is high. At the same time, during the adjustment process, there is no need to bend the torsion spring 3. The torsion spring 3 is only subjected to normal torsion, and the torsion spring 3 will not change its service life due to external stress.

[0046] In addition, a first blocking piece 411 is disposed on the first shifting block 41 , and two ends of the torsion spring 3 are respectively supported under the first blocking pieces 411 of the two first position-limiting members 4 .

[0047] In this way, the rotation of the first blocking piece 411 drives the end of the torsion spring 3 to rotate.

[0048] In addition, a shaft sleeve 43 is provided on the first limiting member 4 , and the shaft sleeve 43 is sleeved on the driving shaft 2 .

[0049] In this way, the structural strength of the first position-limiting member 4 is increased, so that the first position-limiting member 4 is not easily deformed.

[0050] In addition, a fixing sleeve 6 is provided on the fixing seat 1 , a threaded hole is provided in the fixing sleeve 6 , and the adjusting member 5 is threadedly fitted in the threaded hole.

[0051] In this way, the threaded connection between the adjusting member 5 and the fixing seat 1 is achieved, and the structural strength is relatively large.

[0052] In addition, a slot 51 is provided on the top of the adjusting member 5. Specifically, the slot 51 is a hexagonal slot.

[0053] In this way, it is convenient to use a processing tool, such as a wrench, to rotate the adjusting member 5 .

[0054] In addition, a connecting block 22 is provided on the driving shaft 2 , the driving rod 21 is fixed on the connecting block 22 , and one of the first limiting members 4 abuts against the connecting block 22 .

[0055] In this way, the first position-limiting member 4 is restricted from sliding freely along the axial direction of the driving shaft 2 , thereby preventing the end of the torsion spring 3 from falling off from the first paddle 41 of the first position-limiting member 4 .

[0056] Embodiment 2:

[0057] In this embodiment, it also includes a sector tooth 7 and a second limiting member 8, the sector tooth 7 is fixed to the second end of the driving shaft 2, the second limiting member 8 is fixed to the sector tooth 7, a second blocking piece 81 is arranged on the second limiting member 8, two second blocking pieces 81 are arranged at intervals, a limiting rod 9 is arranged on the fixed seat 1, and the limiting rod 9 is located between the two second blocking pieces 81.

[0058] In this way, as the sector teeth 7 rotate, the second baffle 81 will be blocked by the limiting rod 9, making the sector teeth 7 unable to rotate, thereby making the drive shaft 2 unable to rotate. In this way, the rotation range of the sector teeth 7 is limited, thereby also limiting the rotation range of the drive shaft 2, avoiding excessive rotation of the drive shaft 2.

[0059] In addition, it also includes an operating lever 10, a rotating shaft 11, a bevel gear 12, a cam piece 13 and a contact seat 14. The operating lever 10 is installed on the driving shaft 2, the rotating shaft 11 is rotatably installed on the fixed seat 1, the bevel gear 12 is fixed on the top of the rotating shaft 11, and the bevel gear 12 is meshed with the sector gear 7, the cam piece 13 is fixed on the rotating shaft 11, the contact seat 14 is installed on the fixed seat 1, and the trigger switch of the contact seat 14 cooperates with the cam piece 13.

[0060] In this way, the operating lever 10 drives the driving shaft 2 to rotate, the rotation of the driving shaft 2 drives the rotation of the sector teeth 7, the rotation of the sector teeth 7 drives the rotation of the bevel gear 12, the rotation of the bevel gear 12 drives the rotation of the rotating shaft 11, the rotation of the rotating shaft 11 drives the rotation of the cam piece 13, and the cam piece 13 controls the on and off of the trigger switch of the contact seat 14.

[0061] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A zero position adjustment structure of a master controller, characterized in that: include: A fixed seat, a driving shaft, a torsion spring, a first limiter and an adjusting member, wherein the driving shaft is rotatably mounted on the fixed seat, a driving rod is arranged at the first end of the driving shaft, and the driving rod and the driving shaft are arranged at intervals; two first limiters are provided, and the first limiter is rotatably mounted on the first end of the driving shaft, the torsion spring is sleeved on the driving shaft, and the torsion spring is located between the two first limiters; a first shifting block and a second shifting block are arranged on the first limiter, and the first shifting block and the second shifting block are arranged at intervals along the circumference of the first limiter, and the two ends of the torsion spring are respectively against the two first shifting blocks, and the driving rod is clamped between the second shifting blocks of the two first limiters; the adjusting member is installed on the fixed seat, and the adjusting member and the fixed seat are threadedly connected, and the first shifting block is against the bottom of the adjusting member; a fixing sleeve is provided on the fixed seat, a threaded hole is provided in the fixing sleeve, and the adjusting member is threadedly matched in the threaded hole; a connecting block is provided on the driving shaft, the driving rod is fixed on the connecting block, and one of the first limiters is against the connecting block.

2. The zero position adjustment structure of the master controller according to claim 1 is characterized in that: The first shift block is provided with a first blocking piece, and two ends of the torsion spring are respectively supported below the first blocking pieces of the two first limiting members.

3. The zero position adjustment structure of the master controller according to claim 2 is characterized in that: The first limiting member is provided with a shaft sleeve, and the shaft sleeve is sleeved on the driving shaft.

4. The zero position adjustment structure of the master controller according to claim 1 is characterized in that: A slot is arranged on the top of the adjusting member.

5. The zero position adjustment structure of the master controller according to any one of claims 1 to 4, characterized in that: It also includes a sector-shaped tooth and a second limiting member, wherein the sector-shaped tooth is fixed to the second end of the driving shaft, the second limiting member is fixed to the sector-shaped tooth, a second blocking piece is arranged on the second limiting member, two second blocking pieces are arranged at intervals, a limiting rod is arranged on the fixed seat, and the limiting rod is located between the two second blocking pieces.

6. The zero position adjustment structure of the master controller according to claim 5 is characterized in that: It also includes an operating rod, a rotating shaft, a bevel gear, a cam piece and a contact seat, wherein the operating rod is mounted on the driving shaft, the rotating shaft is rotatably mounted on the fixed seat, the bevel gear is fixed on the top of the rotating shaft, and the bevel gear is meshed with the fan gear, the cam piece is fixed on the rotating shaft, the contact seat is mounted on the fixed seat, and the trigger switch of the contact seat cooperates with the cam piece.

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