A kind of angle rotation mechanism and angle rotation method of fork type

Abstract

The application discloses a kind of fork type angle rotation mechanism and angle rotation method, belong to angle adjusting mechanism technical field, it includes: slide rail sleeve pipe, pull rod, index fork and plunger rod;Slide rail sleeve pipe is equipped with linear guide and inclined plane guide, the top of slide rail sleeve pipe is equipped with multiple limit grooves;Index fork is sleeved on pull rod and slides into slide rail sleeve pipe, index fork is equipped with multiple fork grooves, the outside of the top of index fork is equipped with the outer ring protruding block matched with limit groove;Plunger rod is sleeved on the bottom end of pull rod and is connected with pull rod by plunger rod pin, plunger rod pin is slidably matched with linear guide, the top end of plunger rod is inserted into the inside of index fork and is equipped with the plunger block slidably matched with fork groove.The application is pure mechanical mechanism, compared with existing electric control mode, simple structure, smaller size, use, maintenance, maintenance is convenient, cost is lower, with higher performance price ratio, and can greatly improve the life under high temperature, high humidity and other extremely severe environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of angle adjusting mechanism, in particular to a fork type fixed angle rotating mechanism and a fixed angle rotating method. BACKGROUND

[0002] The conventional fixed angle rotating mechanism is realized by a motor auxiliary rotating mechanism and a transmission mechanism. The conventional fixed angle rotating mechanism generally has a servo motor fixedly arranged, and the servo motor and a speed reducer drive a rotating part to rotate, and a travel switch limits the rotating angle. For example, a fixed angle rotating mechanism disclosed in Chinese patent CN108045861A has such a structure, but such a structure has the following disadvantages.

[0003] (1) The structure is complex and large in size, and inconvenient to use, maintain and repair;

[0004] (2) The electric control mode causes high cost;

[0005] (3) The electric control mode has low service life and low cost performance in extreme harsh environments such as high temperature and high humidity. SUMMARY

[0006] The present application aims to provide a fork type fixed angle rotating mechanism and a fixed angle rotating method to solve the problem of low service life of the existing fixed angle rotating mechanism in extreme harsh environments such as high temperature and high humidity.

[0007] The technical solution of the present application to solve the above technical problems is as follows:

[0008] A fork type fixed angle rotating mechanism comprises a slide rail sleeve, a pull rod, a graduated fork and a pull rod.

[0009] The slide rail sleeve is provided with a linear guide rail and an inclined guide rail from top to bottom, the top end of the inclined guide rail is communicated with the bottom end of the linear guide rail, and the length of the inclined guide rail in the axial direction is greater than the width of the linear guide rail; the top of the slide rail sleeve is also uniformly provided with a plurality of limiting grooves;

[0010] The graduated fork is sleeved on the pull rod and slidably extends into the slide rail sleeve, the graduated fork is provided with a plurality of fork grooves at the bottom end, the number and distribution of the fork grooves are consistent with those of the limiting grooves, forming a plurality of fork blocks, and the top outer side of the graduated fork is provided with an outer ring protrusion matched with the limiting grooves;

[0011] The pull rod is sleeved on the bottom end of the pull rod and connected with the pull rod through a pull rod pin, the pull rod pin is slidably matched with the linear guide rail, and the top end of the pull rod extends into the interior of the graduated fork and is provided with a pull block slidably matched with the fork grooves.

[0012] Further, the bottom width of the limiting groove is greater than the width of the outer ring protrusion, the width of the outer ring protrusion is greater than the width of the linear guide rail, and the diameter of the pull rod pin is greater than the width of the linear guide rail.

[0013] Further, the two sides of the limiting groove are respectively provided with a guide inclined surface.

[0014] Further, the inclination angle of the guide inclined surface is 45°.

[0015] Further, the end surface of the push rod pin is lower than or equal to the outer surface of the slide rail sleeve.

[0016] Further, the outer diameter of the push block is consistent with the outer diameter of the index fork.

[0017] Further, the top inner side of the index fork is provided with an inner ring groove which is in sliding cooperation with the external structure.

[0018] A kind of angle setting rotation method based on the above-mentioned fork type angle setting rotation mechanism, comprising the following steps:

[0019] S1: pull rod and push rod are moved downward under the action of gravity, push rod pin slides downward in linear guide rail, push block slides in fork groove, until push block is separated from fork groove, at this time, outer ring protruding block is clamped in limiting groove;

[0020] S2: pull rod and push rod continue to move downward, push rod pin moves to the bottom side of inclined guide rail along linear guide rail;

[0021] S3: pull rod and push rod continue to move downward, push rod pin moves to the lowest point of inclined guide rail along the bottom wall of inclined guide rail, at this time, pull rod and push rod are rotated;

[0022] S4: pull rod and push rod move upward, push rod pin moves vertically upward along inclined guide rail to contact with the top wall of inclined guide rail, drive push block to enter next fork groove;

[0023] S5: pull rod and push rod continue to move upward, push rod pin moves along the top wall of inclined guide rail, at this time, pull rod and push rod are rotated, in the process of upward rotation of push rod, drive index fork to rotate, so that outer ring protruding block is extruded from limiting groove and cooperates with next limiting groove under the action of gravity;

[0024] S6: pull rod and push rod continue to move upward, push rod pin moves upward along linear guide rail, complete the angle setting rotation of index fork, thereby drive the angle setting rotation of external structure connected with index fork.

[0025] Further, in step S5, outer ring protruding block is extruded from limiting groove under the guidance of guide inclined surface.

[0026] The present application has the following beneficial effects:

[0027] (1) The present application is a pure mechanical mechanism that converts axial reciprocating motion under gravity and pulling force to a fixed-angle rotation of the indexing fork. Compared with the existing electric control method, the structure is simple, the volume is small, the use, maintenance and repair are convenient, the cost is low, the performance-price ratio is high, and the service life in extreme harsh environments such as high temperature and high humidity can be greatly improved.

[0028] (2) The present application can make the shifter pin move along the set path only by gravity and upward pulling force, thereby converting axial reciprocating motion into fixed-angle rotary motion of the indexing fork. The entire operation process is simple, convenient and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 FIG. 1 is a structural schematic diagram of the indexing fork type fixed-angle rotation mechanism of the present application;

[0030] Fig. 2 FIG. 2 is an exploded structural schematic diagram of the indexing fork type fixed-angle rotation mechanism of the present application;

[0031] Fig. 3 FIG. 3 is an expanded structural schematic diagram of the slide rail sleeve of the present application;

[0032] Fig. 4 FIG. 4 is a structural schematic diagram of the indexing fork of the present application.

[0033] In the figure: 71 is the slide rail sleeve; 72 is the pull rod; 73 is the indexing fork; 74 is the shifter; 75 is the shifter pin; 711 is the linear guide rail; 712 is the inclined guide rail; 713 is the limiting groove; 714 is the guide inclined surface; 731 is the fork groove; 732 is the fork block; 733 is the outer ring protrusion; 734 is the inner ring recess; 741 is the shifter block. DETAILED DESCRIPTION

[0034] The principles and characteristics of the present application are described below in conjunction with the drawings, and the examples are used only to explain the present application and not to limit the scope of the present application.

[0035] Example 1

[0036] Please refer to Figs. 1 to 4 The present embodiment provides an indexing fork type fixed-angle rotation mechanism, which comprises a slide rail sleeve 71, a pull rod 72, an indexing fork 73 and a shifter 74. The slide rail sleeve 71, the indexing fork 73, the shifter 74 and the pull rod 72 are sequentially sleeved from outside to inside, and are slidingly fitted between adjacent components from outside to inside.

[0037] The slide rail sleeve 71 is a hollow cylinder, which includes two groups of guide rails, which are uniformly spaced along the circumference of the slide rail sleeve 71, and the guiding effect of the two groups of guide rails is more stable. Obviously, in other embodiments of the present application, the number of guide rails can also be 1, 3, 4, etc. The guide rail includes a straight guide rail 711 and an inclined guide rail 712 arranged in sequence from the top, the top end of the straight guide rail 711 extends to the top surface of the slide rail sleeve 71, that is, the top end of the straight guide rail 711 is open, the bottom end of the straight guide rail 711 is communicated with the top end of the inclined guide rail 712, and the bottom end of the inclined guide rail 712 is sealed. The side walls on the left and right sides of the inclined guide rail 712 extend in the axial direction, and the right side wall of the inclined guide rail 712 is in the same extension direction as the right side wall of the straight guide rail 711. The top wall and the bottom wall of the inclined guide rail 712 have an included angle with the axial direction of the slide rail sleeve 71, so that the inclined guide rail 712 is inclined to the lower left. The length of the inclined guide rail 712 in the transverse direction and the axial direction of the slide rail sleeve 71 is greater than the width of the straight guide rail 711, so that the shift lever pin 75 can slide on the right side wall, the bottom wall, the left side wall and the top wall of the inclined guide rail 712 in sequence. Obviously, in other embodiments of the present application, the left side wall of the inclined guide rail 712 can also be in the same extension direction as the left side wall of the straight guide rail 711, at this time the inclined guide rail 712 is inclined to the lower right.

[0038] The top of the slide rail sleeve 71 is uniformly spaced with a plurality of limiting grooves 713, and the two sides of the limiting groove 713 are respectively provided with guide inclined surfaces 714, the inclination of the guide inclined surface 714 is 30° to 60°, in this embodiment, the inclination of the guide inclined surface 714 is 45°, and the bottom width of the limiting groove 713 is greater than the width of the straight guide rail 711.

[0039] The index shift fork 73 extends into the slide rail sleeve 71 from the top end and is in sliding cooperation with the slide rail sleeve 71. The index shift fork 73 is provided with a shift fork groove 731 at the bottom end, and the number and distribution mode of the shift fork groove 731 are consistent with those of the limiting groove 713, forming a plurality of shift fork blocks 732, that is, the shift fork groove 731 is formed between adjacent two shift fork blocks 732. The inner side of the top of the index shift fork 73 is provided with an inner ring groove 734 for sliding cooperation with an external structure, and the outer side of the top of the index shift fork 73 is provided with an outer ring protrusion 733, which extends into the limiting groove 713, and the bottom width of the limiting groove 713 is greater than the width of the outer ring protrusion 733, which is greater than the width of the straight guide rail 711, so as to avoid the outer ring protrusion 733 from entering the straight guide rail 711. When the outer ring protrusion 733 rotates, it slides in the slide rail sleeve 71 under the guidance of the guide inclined surface 714, until the outer ring protrusion 733 is separated from the limiting groove 713, and with the continuation of the rotation, the outer ring protrusion 733 enters the next limiting groove 713, realizing the rotation of the index shift fork 73 at a certain angle. The angle of each rotation is:

[0040]

[0041] In the embodiment, the number of the outer ring protrusions 733 is 2, and the outer ring protrusions 733 are arranged on the top of the indexing fork 73. In other embodiments of the application, the number of the outer ring protrusions 733 can also be 1, 3, 4, 5, etc., as long as all the outer ring protrusions 733 can cooperate with the limiting grooves 713.

[0042] The shifting lever 74 is located inside the sliding rail sleeve 71, and the bottom end of the shifting lever 74 is symmetrically provided with shifting lever pins 75 corresponding in number and distribution to the guide rails. All the shifting lever pins 75 respectively extend into the corresponding linear guide rails 711 and can slide in the linear guide rails 711. In order to make the shifting lever pins 75 slide smoothly, the width of the linear guide rail 711 is greater than the diameter of the shifting lever pin 75. The top of the shifting lever 74 is provided with a shifting block 741 with an arc-shaped outer side, the shifting block 741 extends into the fork groove 731 and can slide in the fork groove 731, in order to avoid interference between the shifting block 741 and the sliding rail sleeve 71.

[0043] In the embodiment, the end face of the shifting lever pin 75 is lower than or equal to the outer surface of the sliding rail sleeve 71, so as to avoid interference between the shifting lever pin 75 and other external structures; the outer diameter of the shifting block 741 is consistent with the outer diameter of the indexing fork 73. Obviously, the outer diameter of the shifting block 741 can also be smaller than the outer diameter of the indexing fork 73.

[0044] In the embodiment, the number of the shifting block 741 is 2, and the shifting block 741 is arranged on the top of the shifting lever 74. In other embodiments of the application, the number of the shifting block 741 can also be 1, 3, 4, 5, etc., as long as all the shifting blocks 741 can cooperate with the fork grooves 731.

[0045] When the shifting lever 74 moves downward, the shifting block 741 separates from the fork groove 731, and under the guidance of the inclined guide rail 712, the shifting block 741 can enter the next fork groove 731 and drive the indexing fork 73 to rotate, so that the outer ring protrusion 733 enters the next limiting groove 713, completing the angular rotation of the indexing fork 73, thereby driving the external structure to rotate at a fixed angle.

[0046] The bottom end of the pull rod 72 extends from the top end of the shifting lever 74 and is connected with the shifting lever 74 through the shifting lever pin 75. The specific connection manner is that the shifting lever pin 75 is fixedly connected (welded, etc.) with the pull rod 72, and the shifting lever pin 75 enters the linear guide rail 711 after passing through the small hole of the shifting lever 74. The top end of the pull rod 72 is located outside the top of the sliding rail sleeve 71, and is used for connecting with an external lifting structure, such as a travelling crane.

[0047] The application is a pure mechanical mechanism for converting the axial reciprocating motion of gravity lowering and tension lifting into the angular rotation of the indexing fork. Compared with the existing electric control mode, the application has the advantages of simple structure, small size, convenient use, maintenance and repair, low cost, high cost performance, and can greatly improve the service life in extreme harsh environments such as high temperature and high humidity.

[0048] Embodiment 2

[0049] The embodiment provides a fixed-angle rotating method based on the fixed-angle rotating mechanism of the fork type of the embodiment 1, and the method comprises the following steps:

[0050] S1: the pull rod 72 and the pull rod 74 move downward under the action of gravity, the pull rod pin 75 slides downward in the linear guide rail 711, the pull block 741 slides in the fork groove 731, until the pull block 741 is separated from the fork groove 731, at this time, the outer ring protruding block 733 is clamped in the limiting groove 713;

[0051] S2: the pull rod 72 and the pull rod 74 continue to move downward under the action of gravity, the pull rod pin 75 moves to the bottom side wall of the inclined guide rail 712 along the linear guide rail 711;

[0052] S3: the pull rod 72 and the pull rod 74 continue to move downward under the action of gravity, the pull rod pin 75 moves to the lowest point of the inclined guide rail 712 along the bottom wall of the inclined guide rail 712, at this time, the pull rod 72 and the pull rod 74 rotate;

[0053] S4: the pull rod 72 and the pull rod 74 move upward under the action of the external lifting structure, the pull rod pin 75 moves vertically upward along the left side wall of the inclined guide rail 712 to contact the top wall of the inclined guide rail 712, and drives the pull block 741 to enter the next fork groove 731;

[0054] S5: the pull rod 72 and the pull rod 74 continue to move upward under the action of the external lifting structure, the pull rod pin 75 moves along the top wall of the inclined guide rail 712, at this time, the pull rod 72 and the pull rod 74 rotate, in the upward rotating process of the pull rod 74, the indexing fork 73 is driven to rotate, so that the outer ring protruding block 733 is extruded from the limiting groove 713 under the guidance of the guide inclined surface 714 and cooperates with the next limiting groove 713 under the action of gravity;

[0055] S6: the pull rod 72 and the pull rod 74 continue to move upward under the action of the external lifting structure, the pull rod pin 75 moves upward along the linear guide rail 711, and the fixed-angle rotation of the indexing fork 73 is completed, so as to drive the fixed-angle rotation of the external structure connected with the indexing fork 73.

[0056] The present application only needs gravity and upward tension to make the pull rod pin move along the set path, so that the axial reciprocating motion is changed into the fixed-angle rotating motion of the indexing fork, and the whole operation process is simple, convenient and reliable.

[0057] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fork-type fixed-angle rotation mechanism, characterized in that, include: Slide rail sleeve (71), pull rod (72), indexing fork (73), and lever (74); The slide rail sleeve (71) is provided with a linear guide rail (711) and an inclined guide rail (712) sequentially from its top. The top end of the inclined guide rail (712) is connected to the bottom end of the linear guide rail (711). The axial length of the inclined guide rail (712) is greater than the width of the linear guide rail (711). The top of the slide rail sleeve (71) is also provided with a plurality of limiting grooves (713) evenly spaced. The indexing fork (73) is sleeved on the pull rod (72) and slides into the slide rail sleeve (71). The indexing fork (73) has fork grooves (731) from its bottom end, the number and distribution of which are the same as those of the limiting groove (713), forming multiple fork blocks (732). The top outer side of the indexing fork (73) is provided with an outer ring protrusion (733) that cooperates with the limiting groove (713). The lever (74) is sleeved on the bottom end of the pull rod (72) and connected to the pull rod (72) through the lever pin (75). The lever pin (75) is slidably engaged with the linear guide rail (711). The top end of the lever (74) extends into the interior of the indexing fork (73) and is provided with a lever block (741) that is slidably engaged with the fork groove (731).

2. The fork-type fixed-angle rotation mechanism according to claim 1, characterized in that, The bottom width of the limiting groove (713) is greater than the width of the outer ring protrusion (733) and the width of the linear guide (711) and the diameter of the lever pin (75).

3. The fork-type fixed-angle rotation mechanism according to claim 2, characterized in that, The limiting groove (713) is provided with guide slopes (714) on both sides.

4. The fork-type fixed-angle rotation mechanism according to claim 3, characterized in that, The guide ramp (714) has an inclination angle of 45°.

5. The fork-type fixed-angle rotation mechanism according to claim 1, characterized in that, The end face of the lever pin (75) is lower than or equal to the outer surface of the slide rail sleeve (71).

6. The fork-type fixed-angle rotation mechanism according to claim 1, characterized in that, The outer diameter of the dial block (741) is the same as the outer diameter of the indexing fork (73).

7. The fork-type fixed-angle rotation mechanism according to any one of claims 1 to 6, characterized in that, The indexing fork (73) has an inner ring groove (734) on the top inner side that slides with the external structure.

8. A method for rotating at a fixed angle based on the fork-type fixed-angle rotating mechanism according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1: The pull rod (72) and the lever (74) move downward under the action of gravity, the lever pin (75) slides downward in the linear guide rail (711), and the lever block (741) slides in the shift fork groove (731) until the lever block (741) disengages from the shift fork groove (731). At this time, the outer ring protrusion (733) is stuck in the limiting groove (713). S2: The pull rod (72) and the lever (74) continue to move downwards, and the lever pin (75) moves along the linear guide (711) to the bottom side of the inclined guide (712); S3: The pull rod (72) and the lever (74) continue to move downwards, and the lever pin (75) moves along the bottom wall of the inclined guide rail (712) to the lowest point of the inclined guide rail (712). At this time, the pull rod (72) and the lever (74) rotate accordingly. S4: The pull rod (72) and the lever (74) move upward, and the lever pin (75) moves vertically upward along the inclined guide rail (712) until it contacts the top wall of the inclined guide rail (712), which drives the lever block (741) into the next lever fork slot (731); S5: The pull rod (72) and the lever (74) continue to move upward, and the lever pin (75) moves along the top wall of the inclined guide rail (712). At this time, the pull rod (72) and the lever (74) rotate accordingly. During the upward rotation of the lever (74), the indexing fork (73) is driven to rotate, so that the outer ring protrusion (733) is squeezed out from the limiting groove (713) and cooperates with the next limiting groove (713) under the action of gravity. S6: The pull rod (72) and the lever (74) continue to move upward, and the lever pin (75) moves upward along the linear guide rail (711) to complete the fixed-angle rotation of the indexing fork (73), thereby driving the fixed-angle rotation of the external structure connected to the indexing fork (73).

9. The fixed-angle rotation method according to claim 8, characterized in that, In step S5, the outer ring protrusion (733) is squeezed out of the limiting groove (713) under the guidance of the guide slope (714).

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