Clutch gear rack mechanism

Abstract

The utility model discloses a clutch gear rack mechanism which comprises a main gear, an auxiliary gear and a spur rack, the spur rack is meshed with the auxiliary gear, the auxiliary gear and the main gear are coaxially arranged in a stacked mode, and the auxiliary gear is in running fit with the main gear. A plurality of sets of elastic mechanisms are evenly distributed on the side portion of the auxiliary gear in the circumferential direction, each elastic mechanism comprises two arc-shaped elastic supporting arms with the bending directions opposite to each other, the first ends of the two elastic supporting arms are connected with each other and fixedly arranged on the side portion of the auxiliary gear, and abutting assemblies evenly distributed in the circumferential direction are formed on the main gear; the abutting assemblies are in one-to-one correspondence with the elastic mechanisms, each abutting assembly comprises two abutting parts, and the second ends of the two elastic supporting arms abut against the two abutting parts respectively. The utility model has a stress buffering effect, and can effectively reduce potential safety hazards.

Description

Technical Field

[0001] The utility model relates to a clutch transmission mechanism, in particular to a clutch gear rack mechanism. Background Art

[0002] In the prior art, equipment such as dishwashers and disinfection cabinets are often equipped with cabinet doors that open and close automatically, including cabinet doors that can open and close automatically and cabinet doors that open and close freely. The cabinet doors that open and close automatically require a motor mechanism to drive, while the cabinet doors that open and close freely require manual opening and closing. However, no matter which type of cabinet door, it is easy for the cabinet door to close abnormally due to factors such as wind and collision. These abnormal closing situations may cause hand pinching incidents, thus posing a safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a clutch gear rack mechanism with stress buffering effect and capable of reducing potential safety hazards in view of the deficiencies of the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0005] A clutch gear rack mechanism, which includes a main gear, a sub-gear and a spur rack, the spur rack and the sub-gear meshing with each other, the sub-gear and the main gear are coaxially stacked, and the sub-gear and the main gear rotate in cooperation, a plurality of sets of elastic mechanisms are evenly distributed along the circumferential direction on the side of the sub-gear, the elastic mechanism includes two arc-shaped elastic arms with opposite bending directions, the first ends of the two elastic arms are connected to each other and fixed to the side of the sub-gear, the main gear is formed with abutment components evenly distributed along the circumferential direction, the abutment components correspond to the elastic mechanisms one by one, the abutment components include two abutment parts, and the second ends of the two elastic arms abut against the two abutment parts respectively.

[0006] Preferably, a disc portion is formed on the end surface of the sub-gear, and the elastic mechanism is formed on the edge of the disc portion.

[0007] Preferably, a circular recess is formed on the main gear, and the disc portion and the elastic mechanism are both disposed in the circular recess.

[0008] Preferably, a fixed shaft is formed at the center of the circular recess, and the auxiliary gear is sleeved on the fixed shaft and the two are rotatably matched.

[0009] Preferably, the abutment portion is formed on an inner wall of the circular recess.

[0010] Preferably, the abutting portion is in a convex block shape.

[0011] In the clutch gear rack mechanism disclosed by the utility model, the secondary gear and the main gear are arranged concentrically and the two are rotatably matched, and the secondary gear and the spur rack are meshed with each other to realize mechanical transmission. On this basis, the secondary gear side of the utility model has a plurality of arc-shaped elastic arms, wherein each two elastic arms constitute a group of elastic mechanisms, and the bending directions of the two elastic arms are opposite to each other and close to a "V" shape. Correspondingly, a plurality of abutment portions are formed on the main gear, and the abutment portions correspond to the elastic arms one by one, so that the end of the elastic arm abuts against the abutment portion. When mechanical transmission is performed between the main gear and the spur rack, if there is no external force obstruction, the main gear, the The secondary gear and the spur rack transmit normally, the secondary gear and the spur rack mesh normally and realize the mechanical conversion between torque and linear motion. Once an abnormal situation occurs, such as the cabinet door pinching your hand or the drive is overloaded, the spur rack will convert the torque F1 into stress F2 applied to the abutment part during the process of applying torque to the secondary gear. Because the elastic support arm is arc-shaped and elastic, the elastic support arm will undergo elastic deformation and rely on the reaction force to cause phenomena such as "idling" and "slipping" between the secondary gear and the spur rack, thereby avoiding large impact forces between the various mechanisms, especially avoiding the situation of pinching your hand in the door body, thereby improving safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional diagram of the clutch gear rack mechanism of the utility model;

[0013] Figure 2 This is an exploded view of the clutch gear rack mechanism of the utility model;

[0014] Figure 3 is a three-dimensional diagram of a secondary gear;

[0015] Figure 4 Top view of the main gear and pinion gear. DETAILED DESCRIPTION

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0017] The utility model discloses a clutch gear rack mechanism, combined with Figures 1 to 4As shown, it includes a main gear 1, a sub-gear 2 and a spur rack 3, the spur rack 3 is meshed with the sub-gear 2, the sub-gear 2 is coaxially stacked with the main gear 1, and the sub-gear 2 is rotatably matched with the main gear 1, and the side of the sub-gear 2 is evenly distributed with multiple groups of elastic mechanisms 20 along the circumferential direction, the elastic mechanism 20 includes two arc-shaped elastic arms 21 with opposite bending directions, the first ends of the two elastic arms 21 are connected to each other and fixed to the side of the sub-gear 2, and the main gear 1 is formed with abutment components 10 evenly distributed along the circumferential direction, the abutment components 10 correspond to the elastic mechanisms 20 one by one, and the abutment components 10 include two abutment portions 11, and the second ends of the two elastic arms 21 abut against the two abutment portions 11 respectively.

[0018] In the above structure, the secondary gear 2 is arranged concentrically with the main gear 1 and the two are rotated together, and the secondary gear 2 and the spur rack 3 are meshed with each other to achieve mechanical transmission. On this basis, the side of the secondary gear 2 of the utility model has a plurality of arc-shaped elastic arms 21, wherein each two elastic arms 21 constitute a group of elastic mechanisms 20, and the bending directions of the two elastic arms 21 are opposite to each other and close to a "V" shape. Accordingly, a plurality of abutment portions 11 are formed on the main gear 1, and the abutment portions 11 and the elastic arms 21 correspond one to one, so that the end of the elastic arm 21 abuts against the abutment portion 11. When the main gear 1 and the spur rack 3 are mechanically transmitted, if there is no external force obstruction, the main gear 1, the sub-gear 2 and the spur rack 3 are normally transmitted, and the sub-gear 2 and the spur rack 3 are normally meshed and realize the mechanical conversion between torque and linear motion. Once an abnormal situation occurs, such as the cabinet door clamping the hand or the drive overload, the spur rack 3 will apply torque to the sub-gear 2. Figure 4 The torque F1 is converted into a stress F2 applied to the abutment portion 11. Since the elastic support arm 21 is arc-shaped and elastic, the elastic support arm 21 will undergo elastic deformation, and rely on the reaction force to cause similar "idling" and "slipping" phenomena to occur between the secondary gear 2 and the spur rack 3, thereby avoiding large impact forces between the various mechanisms, especially avoiding the situation where the door body pinches the hand, thereby improving safety and reliability.

[0019] In order to better arrange the elastic mechanism 20 on the secondary gear 2, see Figure 3 The end surface of the sub-gear 2 is formed with a disc portion 22 , and the elastic mechanism 20 is formed on the edge of the disc portion 22 .

[0020] In the above structure, the pinion 2, the disc portion 22 and the elastic arm 21 are integrally injection molded. The number of the elastic mechanisms 20 is preferably 4 groups, and of course, it can also be set to 3 or 5 groups according to requirements, and these changes all belong to the protection scope of the utility model.

[0021] In order to better match with the main gear 1 , in this embodiment, a circular recess 12 is provided on the main gear 1 , and the disc portion 22 and the elastic mechanism 20 are both disposed in the circular recess 12 .

[0022] See also Figure 2 The disc portion 22 and the elastic mechanism 20 are accommodated in the circular recess 12, so that the disc portion 22 can be well fitted with the main gear 1, and the elastic arm 21 can be reliably abutted with the abutment portion 11. On this basis, the abutment portion 11 is formed on the inner wall of the circular recess 12. And the abutment portion 11 is in the shape of a convex block. In practical applications, the abutment portion 11 can be a rectangular block or an L-shaped block.

[0023] In order to realize the rotational cooperation between the secondary gear 2 and the main gear 1, in this embodiment, a fixed shaft 13 is formed at the center of the circular recess 12, and the secondary gear 2 is sleeved on the fixed shaft 13 and the two are rotationally cooperated. In practical applications, a bearing or other component that is well matched with the fixed shaft 13 can be set in the central inner hole of the secondary gear 2, thereby ensuring that the rotation performance of the secondary gear 2 is good.

[0024] 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 or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clutch gear rack mechanism, characterized in that: The invention comprises a main gear (1), a sub-gear (2) and a spur rack (3), wherein the spur rack (3) meshes with the sub-gear (2), the sub-gear (2) and the main gear (1) are coaxially stacked, and the sub-gear (2) and the main gear (1) are rotationally matched, a plurality of groups of elastic mechanisms (20) are evenly distributed along the circumferential direction on the side of the sub-gear (2), the elastic mechanism (20) comprises two circular arc-shaped elastic support arms (21) with opposite bending directions, the first ends of the two elastic support arms (21) are connected to each other and fixedly arranged on the side of the sub-gear (2), and abutment components (10) evenly distributed along the circumferential direction are formed on the main gear (1), the abutment components (10) correspond to the elastic mechanisms (20) one by one, and the abutment components (10) comprise two abutment portions (11), and the second ends of the two elastic support arms (21) abut against the two abutment portions (11) respectively.

2. The clutch rack and pinion mechanism according to claim 1, characterized in that: The end surface of the secondary gear (2) is formed with a disc portion (22), and the elastic mechanism (20) is formed on the edge of the disc portion (22).

3. The clutch rack and pinion mechanism according to claim 2, characterized in that: The main gear (1) is provided with a circular recess (12), and the disc portion (22) and the elastic mechanism (20) are both arranged in the circular recess (12).

4. The clutch rack and pinion mechanism according to claim 3, characterized in that: A fixed shaft (13) is formed at the center of the circular recess (12), and the auxiliary gear (2) is sleeved on the fixed shaft (13) and the two are rotatably matched.

5. The clutch rack and pinion mechanism according to claim 3, characterized in that: The abutment portion (11) is formed on the inner wall of the circular recess (12).

6. The clutch rack and pinion mechanism according to claim 1, characterized in that: The abutting portion (11) is in the shape of a convex block.

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