Novel grooved wheel mechanism

Abstract

The utility model relates to the technical field of geneva wheel mechanisms, in particular to a novel geneva wheel mechanism, which can effectively prevent a turntable and a geneva wheel from generating axial displacement and movement, so that a round pin on the turntable can more smoothly enter a radial groove, and the transmission stability is ensured. Comprising a driving shaft, a limiting ring fixedly welded to the driving shaft, a rotating disc fixedly arranged on the driving shaft in a sleeving mode, a limiting disc fixedly welded to the bottom end of the rotating disc, the bottom end of the limiting disc abutting against the top end of the limiting ring, a concave transition arc arranged on the outer wall of the rotating disc, and a round pin fixedly arranged on the outer edge of the top end of the limiting disc and right facing the middle of the concave transition arc. The driven shaft is fixedly sleeved with a grooved wheel, the bottom end of the grooved wheel makes contact with the top end of the limiting disc, the top end of the grooved wheel makes contact with the bottom end of the blocking disc, four sets of concave face locking arcs matched with the outer wall of the rotary disc are arranged on the outer wall of the grooved wheel in an array mode, and four sets of radial grooves matched with the round pins are further arranged on the outer wall of the grooved wheel in an array mode. And the concave surface transition arc is matched with the outer wall of the grooved wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of grooved wheel mechanisms, in particular to a novel grooved wheel mechanism. Background Art

[0002] The grooved wheel mechanism is a unidirectional intermittent motion mechanism composed of a grooved wheel and a cylindrical pin, also known as the Malta mechanism. It is often used to convert the continuous rotation of the active part into a unidirectional periodic rotation with pauses of the driven part. The grooved wheel mechanism mainly consists of a turntable with a circular pin and a grooved wheel with radial grooves.

[0003] At present, the existing sheave mechanism has certain drawbacks in operation. Since the turntable and the sheave are fixedly sleeved on the shaft for transmission, the turntable and the sheave are prone to axial displacement and movement during the transmission process, making it difficult for the round pin on the turntable to enter the radial groove, affecting the stability of the transmission. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a new type of grooved wheel mechanism which can effectively prevent the turntable and the grooved wheel from axial displacement and movement, so that the round pin on the turntable can enter the radial groove more smoothly, thereby ensuring the stability of the transmission.

[0005] Technical Solution

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel grooved wheel mechanism, comprising a turntable assembly and a grooved wheel assembly, wherein the turntable assembly comprises a driving shaft, a limiting ring is fixedly welded on the driving shaft, a turntable is fixedly sleeved on the driving shaft, a limiting circular disc is fixedly welded on the bottom end of the turntable, the bottom end of the limiting circular disc abuts against the top end of the limiting ring, a concave transition arc is provided on the outer wall of the turntable, a round pin is fixedly provided on the outer edge of the top end of the limiting circular disc, the round pin is facing the middle of the concave transition arc, and the driving shaft is fixed with a grooved wheel assembly. A baffle is set, a retaining ring groove is provided on the outer wall of the driving shaft, a retaining ring is clamped in the retaining ring groove, and the bottom end of the retaining ring is against the top of the baffle. The sheave assembly includes a driven shaft, and a sheave is fixedly sleeved on the driven shaft. The bottom end of the sheave contacts with the top of the limit disc, and the top of the sheave contacts with the bottom end of the baffle. Four groups of concave locking arcs that cooperate with the outer wall of the turntable are arranged in an array on the outer wall of the sheave. Four groups of radial grooves that cooperate with round pins are also arranged in an array on the outer wall of the sheave, and the concave transition arc cooperates with the outer wall of the sheave.

[0007] Preferably, two groups of positioning pins are symmetrically fixed on the top of the turntable, and two groups of positioning holes are symmetrically provided on the baffle plate to match the positioning pins. The baffle plate is mounted on the driving shaft through the matching positioning holes and the positioning pins.

[0008] Preferably, three groups of arc-shaped slots are opened in an annular array on the limiting disc, and one group of arc-shaped slots is opened on the rotating disc.

[0009] Preferably, the baffle is provided with four groups of fan-shaped notches in an annular array, and the corners of the four groups of fan-shaped notches are all rounded.

[0010] Preferably, the outer edges of the four groups of concave locking arcs and radial grooves and the edges on both sides of the concave transition arcs are all provided with transition fillets.

[0011] The cam is engaged with the guide wheel in the radial groove and the guide wheel is engaged with the guide wheel in the radial groove, thereby preventing the guide wheel from axially displacing and swaying, thereby ensuring that the round pin can enter the radial groove stably and smoothly, thereby effectively preventing the axial displacement and swaying of the cam and the guide wheel, and making the round pin on the cam enter the radial groove more smoothly, thereby ensuring the stability of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an axonometric structural diagram of the present utility model;

[0013] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the bottom axonometric structure of the present utility model;

[0015] Figure 4 This is a schematic diagram of a partial axonometric structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the axonometric structure of the driving shaft in the utility model;

[0017] Markings in the accompanying drawings: 1. driving shaft; 2. limiting ring; 3. turntable; 4. limiting disc; 5. round pin; 6. baffle; 7. retaining ring; 8. driven shaft; 9. groove wheel; 10. concave locking arc; 11. radial groove; 12. concave transition arc; 13. arc-shaped notch; 14. fan-shaped notch; 15. transition fillet; 16. positioning pin. DETAILED DESCRIPTION

[0018] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] Example

[0020] See also Figure 1-Figure 5 The utility model is a new type of groove wheel mechanism, including a driving shaft 1, a limit ring 2 fixedly welded on the driving shaft 1, a turntable 3 fixedly sleeved on the driving shaft 1, a limit disc 4 fixedly welded on the bottom end of the turntable 3, the bottom end of the limit disc 4 abuts against the top of the limit ring 2, a concave transition arc 12 is provided on the outer wall of the turntable 3, a round pin 5 is fixedly provided on the outer edge of the top of the limit disc 4, and the round pin 5 is facing the middle of the concave transition arc 12, a baffle 6 is sleeved on the driving shaft 1, and a baffle 6 is provided on the outer wall of the driving shaft 1 The circlip groove is provided with a snap ring 7, the bottom end of the snap ring 7 is against the top end of the baffle 6, and a groove wheel 9 is fixed on the driven shaft 8. The bottom end of the groove wheel 9 contacts the top end of the limit disc 4, and the top end of the groove wheel 9 contacts the bottom end of the baffle 6. The outer wall of the groove wheel 9 is provided with four groups of concave locking arcs 10 that match the outer wall of the turntable 3. The outer wall of the groove wheel 9 is also provided with four groups of radial grooves 11 that match the round pin 5. The concave transition arc 12 matches the outer wall of the groove wheel 9. When driving, the active The shaft 1 is driven by the motor, and the driving shaft 1 drives the turntable 3 and the limit disc 4 to rotate. The limit disc 4 rotates the groove wheel 9 through the cooperation of the round pin 5 and the radial groove 11, so that the groove wheel 9 performs intermittent motion. The groove wheel 9 is locked after the round pin 5 and the radial groove 11 are disengaged through the cooperation of the concave locking arc 10 and the outer wall of the turntable 3. The baffle 6, the turntable 3 and the limit disc 4 are axially limited by the snap ring 7 and the limit ring 2 to prevent the turntable 3 and the limit disc 4 from axial displacement and movement. In this case, the baffle plate 6 is pressed against the retaining ring 7 to block the baffle plate 6 at the top of the groove wheel 9. The thickness of the groove wheel 9 is consistent with the thickness of the turntable 3. The groove wheel 9 is axially limited by the limiting disc 4 and the baffle plate 6, thereby preventing the groove wheel 9 from axial displacement and movement, ensuring that the round pin 5 can stably and smoothly enter the radial groove 11, thereby effectively preventing the turntable and the groove wheel from axial displacement and movement, and making the round pin on the turntable enter the radial groove more smoothly, thereby ensuring the stability of the transmission.

[0021] The top of the turntable 3 is symmetrically fixed with two groups of positioning pins 16, and the baffle 6 is symmetrically provided with two groups of positioning holes that cooperate with the positioning pins 16. The baffle 6 is mounted on the driving shaft 1 through the positioning holes and the positioning pins 16. The baffle 6 is positioned and installed by the positioning pins 16, so that the turntable 3 can drive the baffle 6 to rotate together when it rotates, thereby avoiding the baffle 6 from not rotating.

[0022] The limiting disc 4 is provided with three groups of arc-shaped slots 13 in a circular array, and the turntable 3 is provided with one group of arc-shaped slots 13. By providing the arc-shaped slots 13 on the turntable 3 and the limiting disc 4, the weight of the turntable 3 and the limiting disc 4 can be effectively reduced, thereby reducing the load on the motor during operation.

[0023] The baffle plate 6 is provided with four groups of fan-shaped slots 14 in a circular array, and the corners of the four groups of fan-shaped slots 14 are chamfered; by providing the fan-shaped slots 14, while keeping the baffle plate 6 to limit the sheave 9, the weight of the baffle plate 6 is effectively reduced, and it is also convenient to take it through the fan-shaped slots 14.

[0024] The outer edges of the four groups of concave locking arcs 10 and radial grooves 11 and the edges on both sides of the concave transition arcs 12 are all provided with transition fillets 15; by setting the transition fillets 15, the cooperation between the turntable 3 and the groove wheel 9 and the cooperation between the round pin 5 and the radial groove 11 can be smoother during the transmission process.

[0025] After the cam 11 is in the engagement with the outer wall of the rotary table 3, the driving shaft 1 is driven by the motor to drive the rotary table 3 and the limiting disc 4 to rotate. The limiting disc 4 drives the rotary table 3 to rotate by the cooperation of the round pin 5 and the radial groove 11, so that the rotary table 3 and the limiting disc 4 are locked. The cam 11 is used to prevent the rotary table 3 and the limiting disc 4 from axially displacing and swaying.

[0026] The installation method, connection method or setting method of the new groove pulley mechanism of the utility model are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the retaining spring of the new groove pulley mechanism of the utility model is purchased on the market, and technical personnel in this industry only need to install and operate it according to the accompanying instruction manual.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A new type of sheave mechanism, characterized in that: It includes a turntable assembly and a sheave assembly; A turntable assembly comprises a driving shaft (1), a limiting ring (2) fixedly welded on the driving shaft (1), a turntable (3) fixedly sleeved on the driving shaft (1), a limiting disc (4) fixedly welded on the bottom end of the turntable (3), the bottom end of the limiting disc (4) abuts against the top end of the limiting ring (2), a concave transition arc (12) is provided on the outer wall of the turntable (3), a round pin (5) is fixedly provided on the outer edge of the top end of the limiting disc (4), the round pin (5) is directly opposite to the middle of the concave transition arc (12), a baffle (6) is sleeved on the driving shaft (1), a retaining ring groove is provided on the outer wall of the driving shaft (1), a retaining ring (7) is clamped in the retaining ring groove, and the bottom end of the retaining ring (7) abuts against the top end of the baffle (6); A sheave assembly comprises a driven shaft (8), a sheave (9) is fixedly sleeved on the driven shaft (8), the bottom end of the sheave (9) contacts the top end of the limiting disc (4), the top end of the sheave (9) contacts the bottom end of the baffle (6), four groups of concave locking arcs (10) matching the outer wall of the rotating disc (3) are arranged in an array on the outer wall of the sheave (9), four groups of radial grooves (11) matching the round pins (5) are also arranged in an array on the outer wall of the sheave (9), and a concave transition arc (12) matches the outer wall of the sheave (9).

2. A novel sheave mechanism according to claim 1, characterized in that: Two groups of positioning pins (16) are symmetrically fixed on the top of the rotating disk (3), and two groups of positioning holes are symmetrically provided on the baffle (6) to match the positioning pins (16). The baffle (6) is fitted on the driving shaft (1) through the matching positioning holes and the positioning pins (16).

3. A novel sheave mechanism according to claim 2, characterized in that: The limiting disc (4) is provided with three groups of arc-shaped notches (13) in a circular array, and the rotating disc (3) is provided with one group of arc-shaped notches (13).

4. A novel sheave mechanism according to claim 3, characterized in that: The baffle (6) is provided with four groups of fan-shaped notches (14) in an annular array, and the corners of the four groups of fan-shaped notches (14) are all rounded.

5. A novel sheave mechanism according to claim 4, characterized in that: The outer edges of the four groups of concave locking arcs (10) and radial grooves (11) and the edges on both sides of the concave transition arcs (12) are all provided with transition fillets (15).

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