CN201513533U

CN201513533U - Drive mechanism

Info

Publication number: CN201513533U
Application number: CN2009203117187U
Authority: CN
Inventors: 朱佳林
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-28
Filing date: 2009-09-28
Publication date: 2010-06-23
Anticipated expiration: 2019-09-28

Abstract

The utility model provides a drive mechanism, which comprises a linear motion device and a circular motion device, wherein the linear motion device comprises two parallel racks and a connecting part which is arranged between the two racks. The circular motion device comprises four groups of gear sets, wherein each gear set comprises a rotation shaft and gears which are arranged at the two ends of the rotation shaft; the rotation shafts on the gear set A and the gear set B are parallel; the rotation shafts on the gear set D and the gear set C are parallel; and the rotation shafts of the gear set A and the gear set D are positioned on the same straight line. A gear a on the gear set A is connected with the rotation shaft through an unilateral bearing A, a gear h on the gear set D is connected with the rotation shaft through an unilateral bearing B, and the other gears are fixedly connected with the rotation shafts. The drive mechanism has the advantages that: the circular motion device has no dead point in the process of rotating; the rotation direction of an output torque shaft is defined; and the circular motion device can not generate centrifugal force in the process of rotating, so that the whole drive mechanism can not automatically shake.

Description

A kind of driving mechanism

Technical field

The utility model belongs to machine power switch technology field, is specifically related to a kind of driving mechanism.

Background technique

In the prior art, the typical driving mechanism that linear reciprocating motion is converted to circular movement is a connecting rod, and connecting rod is widely used in the steamer of internal-combustion piston engine, punch press, air compressor, power station.The motion principle of connecting rod is: the slide block that carries out linear reciprocating motion drives crank by connecting rod and realizes circular movement.Though connecting rod is simple in structure, technology maturation, but exist following shortcoming: 1. there is the dead point in crank in rotation process; 2. the crank sense of rotation is unfixing, reversing can occur; 3. the strictness restriction that provides the power source stroke of straight reciprocating motion to be subjected to crank and connecting rod size to connecting rod; 4. crank can produce centrifugal inertia force in rotation process, and direction deviates from that the center of bent axle is outside, and centrifugal force has quickened the wearing and tearing of bearing and axle journal, and can cause that the oneself of whole connecting rod shakes; 5. even ram speed is certain, the output shaft of output torque is because of existing quickreturn characteristics, and the rotation instantaneous velocity of output varies in size.

Summary of the invention

The purpose of this utility model provides a kind of driving mechanism, solved that crank has the dead point in the prior art connecting rod in rotation, sense of rotation is fixing, and the power source stroke is subjected to the restriction of crank and connecting rod size, and connecting rod can the self-problem that shakes in movement process.

The technological scheme that the utility model adopted is, a kind of driving mechanism comprises linear motion device and circular motion apparatus, and linear motion device comprises two tooth bars that be arranged in parallel and is arranged on link between two toothed rack; Circular motion apparatus comprises four groups of gear trains, and every group of gear train is made up of rotatingshaft and the gear that is arranged on the rotatingshaft two ends; Rotatingshaft on gear train A and the gear train B is set in parallel, and the rotatingshaft on gear train D and the gear train C is set in parallel, and the rotatingshaft of gear train A and gear train D is located on the same line; Gear a on the gear train A and wherein toothed rack engagement, with coaxial gear b that is connected of gear a and the engagement of the gear c on the gear train B, with coaxial gear d that is connected of gear c and the engagement of the gear e on the gear train C, with coaxial gear f that is connected of gear e and the engagement of the gear g on the gear train D, with coaxial gear h that is connected of gear g and the engagement of another toothed rack; Gear train B is fixedlyed connected with rotatingshaft with the gear on the gear train C; Gear a on the gear train A is connected by unilateral bearing A with rotatingshaft, and gear b is fixedlyed connected with rotatingshaft; Gear h on the gear train D is connected by unilateral bearing B with rotatingshaft, and gear g is fixedlyed connected with rotatingshaft.

The beneficial effects of the utility model are that 1. circular motion apparatus the dead point can not occur in rotation process; 2. the sense of rotation of output torque axis is certain; 3. in the length range of tooth bar, provide the movement travel of the power source of linear reciprocating motion to select arbitrarily as required; 4. circular motion apparatus can not produce centrifugal force at rotation process, and whole driving mechanism can the oneself not shake; When the speed of tooth bar certain, the rotational speed of the motion output shaft of output torque is at the uniform velocity.

Description of drawings

Fig. 1 is the structural representation of circular motion apparatus in the utility model driving mechanism;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is that the B of Fig. 1 is to view;

Fig. 4 is the fundamental diagram of the utility model driving mechanism driving mechanism when tooth bar travels forward;

Fig. 5 is the fundamental diagram of the utility model driving mechanism driving mechanism when tooth bar moves backward.

Among the figure, 1. tooth bar, 2. link, 3. gear train A, 4. gear train B, 5. gear train C, 6. gear train D, 7. gear a, 8. gear b, 9. gear c, 10. gear d, 11. gear e, 12. gear f, 13. gear g, 14. gear h, 15. unilateral bearing A, 16. unilateral bearing B, 17. motion output shafts.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As Fig. 1, Fig. 2, shown in Figure 3: the utility model provides a kind of driving mechanism, comprises linear motion device and circular motion apparatus.Linear motion device comprises two tooth bars that be arranged in parallel 1 and is arranged on link 2 between two toothed rack 1.Circular motion apparatus comprises four groups of gear trains, and every group of gear train is made up of rotatingshaft and the gear that is arranged on the rotatingshaft two ends; Rotatingshaft on gear train A3 and the gear train B4 is set in parallel, and the rotatingshaft on gear train D6 and the gear train C5 is set in parallel, and the rotatingshaft of gear train A3 and gear train D6 is located on the same line.Gear a7 on the gear train A3 and a wherein toothed rack 1 engagement, with coaxial gear b8 that is connected of gear a7 and the engagement of the gear c9 on the gear train B4, with coaxial gear d10 that is connected of gear c9 and the engagement of the gear e11 on the gear train C5, with coaxial gear f12 that is connected of gear e11 and the engagement of the gear g13 on the gear train D6, with coaxial gear h14 that is connected of gear g13 and 1 engagement of another toothed rack.Gear train B4 is fixedlyed connected with rotatingshaft with the gear on the gear train C5; Gear a7 on the gear train A3 is connected by unilateral bearing A15 with rotatingshaft, and gear b8 is fixedlyed connected with rotatingshaft; Gear h14 on the gear train D6 is connected by unilateral bearing B16 with rotatingshaft, and gear g13 is fixedlyed connected with rotatingshaft.Gear a7 equates to the velocity ratio of gear b8 with gear h14 to the velocity ratio of gear g13.

Unilateral bearing is can freely rotate in one direction, and on another direction locked a kind of bearing.In the utility model, gear a7 is connected by unilateral bearing A15 with rotatingshaft, and the fixed conveyor direction of unilateral bearing A15 backward; When gear a7 rotated backward, gear a7 drove unilateral bearing A15 and rotates backward, and unilateral bearing A15 drives rotatingshaft again and rotates backward; When gear a7 rotated forward, opposite with the fixed conveyor direction of unilateral bearing A15, gear a7 was idle running on unilateral bearing A15.Gear h14 is connected by unilateral bearing B16 with rotatingshaft, and the fixed conveyor direction of unilateral bearing B16 forward; When gear h14 rotated forward, gear h14 drove unilateral bearing B16 and rotates forward, and unilateral bearing B16 drives rotatingshaft again and rotates forward; When gear h14 rotated backward, opposite with the fixed conveyor direction of unilateral bearing B16, gear h14 was idle running on unilateral bearing B16.

The working principle of this driving mechanism is:

As shown in Figure 4: when tooth bar 1 travels forward with straight line motion, with two toothed rack, 1 meshed gears a7 and gear h14 rotation forward simultaneously.The fixed conveyor direction that is arranged on the unilateral bearing A15 on the gear a7 backward, the fixed conveyor direction that is arranged on the unilateral bearing B16 on the gear h14 is forward.When the tooth bar 1 driven gear h14 that travels forward rotates forward, the sense of rotation of gear h14 is identical with the fixed conveyor direction of unilateral bearing B16, gear h14 drive unilateral bearing B16 rotates forward so, unilateral bearing B16 rotates forward by rotatingshaft driven gear g13, gear g13 passes to gear b8 by gear train C5 and gear train B4 with circular movement again, gear b8 then rotates backward, gear b8 drives unilateral bearing A15 by rotatingshaft again and moves backward, because the sense of rotation of gear a7 is opposite with the fixed conveyor direction of unilateral bearing A15, gear a7 is idle running on unilateral bearing A15, and does not influence the rotation of gear b8.

As shown in Figure 5: when tooth bar 1 moves backward with straight line motion, with two toothed rack, 1 meshed gears a7 and gear h14 rotation backward simultaneously.The fixed conveyor direction that is arranged on the unilateral bearing A15 on the gear a7 backward, the fixed conveyor direction that is arranged on the unilateral bearing B16 on the gear h14 is forward.When tooth bar 1 when motion driven gear a7 rotates backward backward, the sense of rotation of gear a7 is identical with the fixed conveyor direction of unilateral bearing A15, gear a7 drive unilateral bearing A15 rotates backward so, unilateral bearing A15 rotates backward by rotatingshaft driven gear b8, gear b8 passes to gear g13 by gear train B4 and gear train C5 with circular movement again, gear g13 then rotates forward, gear g13 drives unilateral bearing B16 by rotatingshaft again and travels forward, because the sense of rotation of gear h14 is opposite with the fixed conveyor direction of unilateral bearing B16, gear h14 is idle running on unilateral bearing B16, and does not influence the rotation of gear g13.

Motion output shaft 17 can be arranged on gear b8, gear c9, gear d10, gear e11, gear f12, gear g13 any one or a plurality of gear.

Claims

1. a driving mechanism comprises linear motion device and circular motion apparatus, it is characterized in that: described linear motion device comprises two tooth bars that be arranged in parallel (1) and is arranged on link (2) between two toothed rack (1); Described circular motion apparatus comprises four groups of gear trains, and every group of gear train is made up of rotatingshaft and the gear that is arranged on the rotatingshaft two ends; Rotatingshaft on gear train A (3) and the gear train B (4) is set in parallel, and the rotatingshaft on gear train D (6) and the gear train C (5) is set in parallel, and gear train A (3) is located on the same line with the rotatingshaft of gear train D (6); Gear a (7) on the gear train A (3) and a wherein toothed rack (1) engagement, with gear c (9) engagement on coaxial gear b (8) that is connected of gear a (7) and the gear train B (4), with gear e (11) engagement on coaxial gear d (10) that is connected of gear c (9) and the gear train C (5), with gear g (13) engagement on coaxial gear f (12) that is connected of gear e (11) and the gear train D (6), with the coaxial gear h (14) that is connected of gear g (13) and another toothed rack (1) engagement; Described gear train B (4) is fixedlyed connected with rotatingshaft with the gear on the gear train C (5); Gear a (7) on the gear train A (3) is connected by unilateral bearing A (15) with rotatingshaft, and gear b (8) is fixedlyed connected with rotatingshaft; Gear h (14) on the gear train D (6) is connected by unilateral bearing B (16) with rotatingshaft, and gear g (13) is fixedlyed connected with rotatingshaft.