Hand-cranking mechanism

Abstract

The utility model discloses a hand-cranking mechanism which comprises a base, a lead screw, a driving shaft, a fixing cover and a gear disc, a switch is fixed on one side of the base, the lead screw is rotatably arranged on the base and connected with the driving shaft, a protruding block protrudes out of the driving shaft, a plurality of protruding teeth protrude out of the outer edge of the gear disc, and tooth grooves are formed between adjacent protruding teeth. In the rotating process of the driving shaft, the protruding blocks extend into the tooth grooves to drive the gear disc to rotate, positioning columns and limiting holes are arranged on the gear disc, a first positioning hole and a second positioning hole which are matched with the positioning columns on the two sides in an inserted mode are correspondingly formed in the base and the fixing cover, and a stopping structure for stopping and limiting the gear disc is arranged in the fixing cover. The utility model has the advantages that the structure is simplified and compact, the action is smooth and stable, and the volume is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electrical cabinet more specifically, relate to a hand mechanism. BACKGROUND

[0002] The switch cabinet is a kind of electrical equipment, hand mechanism is generally configured on the switch cabinet, for the opening of switch cabinet is controlled.Patent document CN219611185U discloses a labor-saving type hand mechanism for switch cabinet, it includes rectangular frame and micro-motion stroke switch, first shaft, second shaft and third shaft are rotationally arranged in rectangular frame, and lead screw is connected at the both ends of second shaft, the opening of switch cabinet is carried out by handle, and first shaft, second shaft and third shaft are connected by the transmission of gear assembly arranged in rectangular frame, the gear assembly includes multiple gears, the structure makes the volume of hand mechanism larger, simultaneously, when assembling, the meshing installation of multiple gears is needed, and assembly is complicated, production efficiency is low. SUMMARY

[0003] The utility model provides a kind of hand mechanism, by structure optimization, make its structure simplify, it is also helpful to reduce the volume of mechanism simultaneously.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of hand mechanism, including base, lead screw and driving shaft, the base one side is fixed with switch, the lead screw rotationally arranged in base and is connected with the driving shaft;The hand mechanism further includes fixed cover and gear disc of trigger switch that cover is set to gear disc outside, the driving shaft is protruding with a boss, the gear disc outer edge is protruding with multiple teeth, tooth slot is formed between adjacent teeth, the driving shaft is rotated in the process by boss extension into tooth slot and drives gear disc rotation, the axial position of gear disc is integrally protruded with positioning column on both sides, the base and fixed cover are correspondingly provided with the first positioning hole and the second positioning hole of the insertion joint of both sides positioning column, the fixed cover is provided with the resistance structure that gear disc is resisted and limited in.

[0005] The utility model is further provided as follows: the recess is equipped at the root of boss on the driving shaft.

[0006] The utility model is further provided as follows: the gear disc one side is integrally protruded with hollow gear column, the gear column is provided with elastic member, the fixed cover inner side is spaced apart and provided with gear slot on the rotation path of elastic member, when elastic member is clamped in different gear slot, gear disc is in different gear.

[0007] The utility model is further provided as follows: the fixed cover outside is provided with gear indicating disc, and the gear indicating disc is fixedly connected with the end of positioning column.

[0008] The utility model further sets up: the gear disc forms the round arc shape's limit hole, the fixed hole is seted up on the base, and the limit screw is connected in the fixed hole through the limit hole thread, and the limit screw limits the rotation stroke of gear disc.

[0009] The utility model further sets up: the gear disc forms the limit slot, the limit slot is round arc shape, the limit slot is protruding and has the touch block of trigger switch, the touch block is located in the middle part of limit slot and forms the guide slope surface on both sides.

[0010] The utility model further sets up: the convex tooth outer edge forms arc recess.

[0011] The utility model further sets up: the resistance structure includes the limit baffle of being integrally arranged in the fixed cover, and the limit baffle is suitable for being opposite with gear disc.

[0012] The utility model further sets up: the limit boss is protrudingly arranged on the side peripheral surface of drive shaft, and the limit boss side end forms the limit surface of resistance limit to convex tooth.

[0013] The utility model further sets up: the base has the support plane of forming the support to gear disc corresponding side surface.

[0014] The utility model has following effect: in the utility model, uses a gear disc and drive shaft cooperation to realize transmission to trigger switch and drive gear display rotation, simple structure is favorable to reduce the volume of mechanism, and resistance structure can resist limit gear disc, makes it keep in current position and does not appear displacement, optimizes product structure, and through the plug-in installation, can make assembly more simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the perspective view of hand-operated mechanism in the embodiment of the utility model;

[0016] Figure 2 It is the sectional view of hand-operated mechanism in the embodiment of the utility model;

[0017] Figure 3 It is the perspective view of hand-operated mechanism of the fixed cover in the embodiment of the utility model;

[0018] Figure 4 It is the perspective view of gear disc in the embodiment of the utility model;

[0019] Figure 5 It is the perspective view of fixed cover in the embodiment of the utility model;

[0020] Figure 6 It is the perspective view of drive shaft in the embodiment of the utility model Figure 1 ;

[0021] Figure 7 For the embodiment of the utility model drive shaft's three-dimensional Figure 2 .

[0022] The figure shows the sign is: 1, base; 11, first positioning hole; 10, support plane; 12, fixed hole; 2, screw rod; 3, drive shaft; 31, lug; 32, recess; 34, limit boss; 341, limit surface; 4, switch; 5, fixed cover; 51, second positioning hole; 52, limit baffle; 53, gear slot; 6, gear disc; 61, convex tooth; 611, arc recess; 62, tooth slot; 63, positioning column; 64, gear column; 65, limit hole; 66, limit slot; 67, touch block; 671, guide slope; 7, gear indicating disc; 8, elastic member. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0024] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate with a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] Refer to Figures 1 to 7 Further illustrate the embodiment of the utility model.

[0026] A hand-operated mechanism, comprising a base 1, a screw rod 2 and a driving shaft 3, the base 1 is formed with an installation gap for the screw rod 2, and locking holes are arranged on the opposite two side walls of the installation gap, the screw rod 2 is provided with a connecting shaft part at both ends which is rotatable in the locking holes, one side of the base 1 is fixed with a switch 4 (preferably a micro switch), the screw rod 2 is rotatably arranged on the base 1 and connected with the driving shaft 3, in order to facilitate the rotation of the driving shaft 3, a driving groove is arranged on the outer end of the driving shaft 3 for inserting the operating handle, the driving shaft 3 is further provided with a clamping groove in communication with the driving groove, the connecting shaft part at one end of the screw rod 2 is clamped in the clamping groove, and then a fixing bolt is used to pass through the driving groove and is screwed on the connecting shaft part of the screw rod 2, so as to fix the screw rod 2 and the driving shaft 3, and realize the synchronous rotation of the screw rod 2 when the driving shaft 3 rotates, preferably the cross-sectional shape of the clamping groove and the connecting shaft part is matched with each other, which is helpful for torque transmission.

[0027] Reference is made to the accompanying drawings Figure 2 、 3 The hand-operated mechanism further comprises a fixed cover 5 covering the gear disc 6 and the gear disc 6 triggering the switch 4, the fixed cover 5 is fixedly connected with the base 1, the fixed cover 5 is arranged to protect the gear disc 6 and participate in the positioning of the gear disc 6, the driving shaft 3 protrudes a protruding block 31 on the side surface, the gear disc 6 protrudes a plurality of protruding teeth 61 on the outer edge, a tooth groove 62 is formed between adjacent protruding teeth 61, the driving shaft 3 rotates to drive the gear disc 6 to rotate by the protruding block 31 extending into the tooth groove 62, a positioning column 63 is integrally protruded on both sides of the axial position of the gear disc 6, the base 1 and the fixed cover 5 are correspondingly provided with a first positioning hole 11 and a second positioning hole 51 which are respectively inserted and matched with the positioning columns 63 on the corresponding sides of the gear disc 6, the gear disc 6 is positioned by the cooperation of the first positioning hole 11, the second positioning hole 51 and the positioning columns 63 on the corresponding sides of the gear disc 6, and a resisting structure is arranged in the fixed cover 5 to resist and limit the gear disc 6; when assembling the hand-operated mechanism, the positioning column 63 on one side of the gear disc 6 is inserted into the first positioning hole 11 to position the gear disc 6 on the base 1, and then the fixed cover 5 is installed to make the positioning column 63 on the other side of the gear disc 6 pass through the second positioning hole 51 and rotate in the second positioning hole 51, one gear disc 6 is used to cooperate with the driving shaft 3 to realize transmission, the structure is simple, which is conducive to reducing the size of the mechanism, the resisting structure can resist and limit the gear disc 6 to keep it in the current position without displacement, which optimizes the product structure, and the structure design of the gear disc 6 can make the assembly more simple and convenient; in actual use, the driving shaft 3 is driven to rotate by connecting the operating handle with the driving shaft 3, and then driving the screw rod 2 to rotate, and transmitting power to the associated linkage components through the screw rod 2 to realize the control function, in this process, the driving shaft 3 also drives the gear disc 6 to rotate through the cooperation of the protruding block 31 and the tooth groove 62, and then triggers the switch to switch the state through the gear disc 6.

[0028] Reference is made to the accompanying drawingsFigure 3 、 5 , the driving shaft 3 is provided with a groove 32 at the root of the protrusion 31, the groove 32 is located on both sides of the protrusion 31, so that when the operating handle drives the driving shaft 3 to rotate, the groove 32 can fully avoid the ratchet tooth 61 when the protrusion 31 switches from the gear slot 62 to the adjacent gear slot 62, preventing the problem of jamming, making the switching action more smooth.

[0029] Reference to the accompanying drawings Figure 2 、 3 , 5, the gear disc 6 is integrally and protrudingly provided with a hollow gear column 64 on one side, and an elastic element 8 is arranged in the gear column 64, the elastic element 8 elastically abuts on the fixed cover 5 in normal state, the fixed cover 5 is provided with gear grooves 53 at intervals on the rotating path of the elastic element 8, when the gear disc 6 rotates to the corresponding gear, the elastic element 8 is clamped with the gear groove 53 of the corresponding part and emits a knocking sound, which can play a prompting role through the sound; for example, the elastic element 8 can adopt a spring and a locking pin, the locking pin slides in the mounting hole, and the locking pin is clamped with the gear groove 53 through the elastic force provided by the spring, and preferably, three gear grooves 53 are arranged to correspond to three different gears.

[0030] As a preferred, the gear column 64, the positioning column 63 and the gear disc 6 are integrally injection molded, which is helpful to simplify the processing procedure and can ensure the stability of the structure.

[0031] Reference to the accompanying drawings Figure 1 , further embodiments, the fixed cover 5 is provided with a gear indicating disc 7 outside, the gear indicating disc 7 is fixedly connected with the end of the positioning column 63 extending out of the second positioning hole 51, so that the gear indicating disc 7 can be rotated in the rotating process of the gear disc 6, and then the gear indicating disc 7 indicates the gear state; more specifically, the gear indicating disc 7 is provided with a clamping through hole, after the positioning column 63 on the corresponding side of the gear disc 6 is clamped in the second positioning hole 51, the fastening bolt passes through the clamping through hole and is fixed to the positioning column 63, and the gear indicating disc 7 can be provided with a gear mark, so that the operator can intuitively understand the current gear.

[0032] Reference to the accompanying drawings Figure 3The gear disc 6 is formed with a circular arc shaped limiting hole 65, and the base 1 is formed with a fixing hole, and a limiting screw is threadedly connected to the fixing hole through the limiting hole 65, and when the gear disc 6 rotates to the limit position, the corresponding end of the limiting hole 65 abuts against the limiting screw, thereby playing a stop limiting role, so that the rotating stroke of the gear disc 6 can be limited by the limiting screw; during assembly, the one side positioning column 63 of the gear disc 6 is inserted into the first positioning hole 11, and the corresponding side surface of the gear disc 6 is attached to the base 1, then the limiting screw is threadedly connected to the fixing hole through the limiting hole 65, and then the fixing cover 5 is covered outside the gear disc 6 and fixed with the base 1, and the other side positioning column 63 of the gear disc 6 is inserted into the second positioning hole 51, and the limiting screw can limit the rotating stroke of the gear disc 6 while limiting the installation of the gear disc 6.

[0033] Reference is made to the accompanying drawings Figure 4 The gear disc 6 is formed with a limiting groove 66, the limiting groove 66 is circular arc shaped, and the limiting groove 66 is protruded with a trigger block 67 of the trigger switch 4, the trigger block 67 is located in the middle of the limiting groove 66 and is formed with guide slopes 671 on both sides, when the gear disc 6 rotates to the middle gear position, the trigger block 67 can trigger the switch 4, and the guide slopes 671 can make the triggering switching process of the switch 4 more smooth.

[0034] Reference is made to the accompanying drawings Figure 3 、 4 The outer edge of the protruding tooth 61 is formed with an arc-shaped recess 611, and through the arrangement of the arc-shaped recess 611, after the protruding block 31 is turned out of the tooth groove 62, the protruding tooth 61 and the circumferential surface of the driving shaft 3 are avoided from being in contact, so that the rotating process is smooth.

[0035] Reference Figure 2 The stop structure includes a limiting baffle 52 integrally arranged in the fixing cover 5, and the limiting baffle 52 is adapted to abut against the side surface of the gear disc 6; the limiting baffle 52 protrudes towards the gear disc 6 and is adapted to abut against the side surface of the gear disc 6, thereby limiting the gear disc 6 to be stable installed.

[0036] Reference is made to the accompanying drawings Figure 2 、 6 , as shown in the drawings, the limiting boss 34 is protruded on the side circumferential surface of the driving shaft 3, and the side end of the limiting boss 34 is formed with a limiting surface 341 for abutting against the protruding tooth 61, the limiting boss 34 and the limiting baffle 52 cooperate to limit the gear disc 6, and when the protruding block 31 is clamped in the tooth groove 62, the limiting surface 341 abuts against the side surface of the protruding tooth 61, so that the clamping of the protruding block 31 and the tooth groove 62 is more stable.

[0037] Reference is made to the accompanying drawings Figure 3The base 1 has a supporting plane 10 which supports the corresponding side of the gear plate 6, and the gear plate 6 is effectively supported by the supporting plane 10, so that the stability of the gear plate 6 during installation and rotation is enhanced.

[0038] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A hand-crank mechanism, comprising a base, a screw and a drive shaft, wherein a switch is fixed to one side of the base, and the screw is rotatably disposed on the base and connected to the drive shaft; characterized in that: The gear plate is provided with a fixed cover arranged outside the gear plate and a gear plate for triggering a switch. A protrusion is protruded from the driving shaft, and a plurality of protruding teeth are protruded from the outer edge of the gear plate. Tooth grooves are formed between adjacent protruding teeth. During the rotation of the driving shaft, the protrusion extends into the tooth groove to drive the gear plate to rotate. Positioning columns are integrally provided on both sides of the axis position of the gear plate. The base and the fixed cover are correspondingly provided with a first positioning hole and a second positioning hole that are plugged into and cooperate with the positioning columns on both sides. A resistance structure for resisting and limiting the gear plate is provided in the fixed cover.

2. The hand crank mechanism according to claim 1, characterized in that: The driving shaft is provided with a groove at the root of the projection.

3. The hand crank mechanism according to claim 1, characterized in that: A hollow gear column is integrally provided on one side of the gear plate, an elastic member is provided in the gear column, and gear grooves are provided on the inner side surface of the fixed cover at intervals on the rotation path of the elastic member. When the elastic member is engaged in different gear grooves, the gear plate is in different gears.

4. The hand crank mechanism according to claim 1, characterized in that: A gear indicator plate is provided on the outside of the fixed cover, and the gear indicator plate is fixedly connected to the end of the positioning column.

5. The hand crank mechanism according to claim 1, characterized in that: An arc-shaped limiting hole is formed on the gear plate, and a fixing hole is opened on the base. A limiting screw passes through the limiting hole and is threadedly connected to the fixing hole. The limiting screw limits the rotation stroke of the gear plate.

6. The hand crank mechanism according to claim 1, characterized in that: A limiting groove is formed on the gear plate, and the limiting groove is arc-shaped. A trigger block for triggering a switch protrudes from the limiting groove. The trigger block is located in the middle of the limiting groove and has guiding slopes formed on both sides.

7. The hand crank mechanism according to claim 1, characterized in that: An arc-shaped recess is formed on the outer edge of the convex tooth.

8. The hand crank mechanism according to claim 1, characterized in that: The resisting structure includes a limiting baffle integrally provided in the fixed cover, and the limiting baffle is suitable for resisting against the gear plate.

9. The hand crank mechanism according to claim 1, characterized in that: A limiting boss is protruding from the side circumference of the driving shaft, and a side end of the limiting boss forms a limiting surface for resisting and limiting the convex teeth.

10. The hand crank mechanism according to claim 1, characterized in that: The base has a supporting plane for supporting corresponding side surfaces of the gear plate.

Images