Drawer hand-cranking propelling mechanism

Abstract

The utility model relates to a drawer hand-cranking propelling mechanism. The technical problem to be solved by the utility model is to provide the drawer hand-cranking propelling mechanism. According to the technical scheme, the hand-cranking device comprises a drawer bottom frame and a drawer frame, the hand-cranking device comprises a hand-cranking propelling body and a driving base, the hand-cranking propelling body comprises a main support, a worm assembly, a driving gear, a hand-cranking handle and a stroke limiting piece, and a propelling cavity and a gear transmission cavity are formed in the main support; the worm assembly comprises a worm and a transmission gear, the driving gear comprises a gear shaft body, a gear column body and a gear large tooth part, the driving gear is rotatably arranged in the gear transmission cavity, and the gear large tooth part is meshed with the transmission gear. The utility model has the advantages that: parts are fewer, the whole volume is small, the compactness is improved, and more space is saved; a stroke limiting piece is arranged, it is ensured that the stroke of shaking-in and shaking-out is effectively controlled, and the action is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of drawer cabinets, in particular to a hand-cranked propulsion mechanism for a drawer. Background Art

[0002] The drawer unit in a switchgear cabinet is a modular electrical device used to control and protect circuits in power distribution systems. Its primary function is to facilitate switchgear maintenance, expansion, and equipment upgrades. The drawer manual propulsion mechanism is a manually operated propulsion device used to control the forward and backward movement of the drawer unit within the switchgear cabinet. Existing manual propulsion mechanisms for drawers have the following issues: 1. They have a large number of components, resulting in a poorly compact design and a large size; 2. They lack effective limit limits for the in-and-out movement, resulting in an unstable and unstable propulsion process and poor reliability. Improvements and optimizations are being developed to address these issues. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the present invention is to provide a drawer hand-cranked propulsion mechanism.

[0004] The technical solution adopted by the hand-cranked propulsion mechanism of the present invention is as follows: it includes a drawer bottom frame and a drawer frame that can be moved back and forth on the drawer bottom frame by a hand-cranked device, and is characterized in that the hand-cranked device includes a hand-cranked propulsion body fixed in the drawer frame and a driving base fixed on the drawer bottom frame, the hand-cranked propulsion body includes a main bracket, a worm assembly, a driving gear, a hand crank connected to the driving gear, and a stroke limiter, a propulsion chamber and a gear transmission chamber are provided in the main bracket, the worm assembly includes a worm rotatably arranged in the propulsion chamber and a transmission gear sleeved on the end of the worm and placed in the gear transmission chamber, the driving gear The gear includes a gear shaft, a gear cylinder and a large gear tooth portion provided on the gear shaft. The driving gear is rotatably provided in the gear transmission cavity and the large gear tooth portion is engaged with the transmission gear gear. The stroke limiter includes a limiter mounting portion fixed on the outer wall of the gear transmission cavity and a limiter cylinder provided on the gear transmission cavity. The end of the gear cylinder is provided with an arc limiter groove corresponding to the limiter cylinder and used for hand-cranking stroke limit. The driving base is provided with a base docking boss, and the base docking boss is provided with transmission grooves threadedly connected to the worm at intervals.

[0005] The hand crank comprises a hand crank and a rotating round handle fixed at the end of the hand crank, and a gear docking hole for the hand crank to pass through is provided at the center of the gear shaft.

[0006] The hand crank is provided with a hand crank section.

[0007] The hand-cranked propulsion body further comprises a positioning column arranged on the inner wall of the gear transmission cavity, and the positioning column abuts against the end surface of the gear column.

[0008] An inner hexagonal debugging hole is provided on the outer end surface of the transmission gear.

[0009] The advantages of the hand-cranked push mechanism for the drawer of this utility model are: fewer parts, small overall size, improved compactness, and more space saving; a travel limiter is provided to ensure that the swinging in and out stroke is effectively controlled and the movement is more precise; the positioning column ensures stability during the pushing process, effectively reduces vibration and deviation, and improves the stability and smoothness of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a structural diagram of the hand-cranked propulsion mechanism of the drawer of the utility model;

[0012] Figure 2 This is a schematic structural diagram of the hand-cranked device of the utility model;

[0013] Figure 3 This is a structural diagram of the hand-cranked propulsion main body of the utility model;

[0014] Figure 4 It is a structural diagram of the main bracket of the utility model;

[0015] Figure 5 It is a structural diagram of the worm assembly of the utility model;

[0016] Figure 6 This is a schematic structural diagram of the driving gear of the utility model;

[0017] Figure 7 This is a structural diagram of the travel limiter of the utility model;

[0018] Figure 8 This is a schematic diagram of the structure of the driving base of the utility model;

[0019] Figure 9 It is a structural diagram of the hand crank of the utility model. DETAILED DESCRIPTION

[0020] like Figure 1-9As shown, the drawer hand-cranked propulsion mechanism involved in the present invention includes a drawer bottom frame 1 and a drawer frame 2 that can move back and forth on the drawer bottom frame 1 through a hand-cranked device 3. The hand-cranked device 3 includes a hand-cranked propulsion body 6 fixed in the drawer frame 2 and a driving base 7 fixed on the drawer bottom frame 1. The hand-cranked propulsion body 6 includes a main bracket 9, a worm assembly 10, a driving gear 11, a hand crank handle 12 connected to the driving gear 11, and a stroke limiter 13. A propulsion chamber 15 and a gear transmission chamber 16 are provided in the main bracket 9. The worm assembly 10 includes a worm 17 rotatably provided in the propulsion chamber 15 and a transmission gear 18 sleeved on the end of the worm 17 and placed in the gear transmission chamber 16. The driving gear 11 includes a gear shaft 19, a gear shaft provided on the gear shaft 19 The gear cylinder 20 and the gear large tooth portion 21, the driving gear 11 is rotatably arranged in the gear transmission cavity 16 and the gear large tooth portion 21 is meshed with the transmission gear 18. The stroke limiter 13 includes a limiter mounting portion 24 fixed on the outer wall of the gear transmission cavity 16 and a limiter cylinder 25 provided on the gear transmission cavity 16. The end of the gear cylinder 20 is provided with an arc limiter groove 27 corresponding to the limiter cylinder 25 and used for hand-cranking stroke limit. The driving base 7 is provided with a base docking boss 28, and the base docking boss 28 is provided with transmission grooves 29 screwed to the worm 17 at intervals. It has fewer parts, a small overall volume, improved compactness, and more space saving. A stroke limiter 13 is provided to ensure that the rocking-in and rocking-out stroke is effectively controlled and the movement is more precise.

[0021] The hand crank 12 includes a hand crank 30 and a rotating round handle 31 fixed at the end of the hand crank 30. The center of the gear shaft 19 is provided with a gear docking hole 32 for the hand crank 30 to pass through. The design of the rotating round handle makes operation more convenient and improves user experience.

[0022] The hand crank 30 is provided with a hand crank section 33, which makes the rotational action highly consistent and the action stable and controllable.

[0023] The hand-cranked propulsion body 6 also includes a positioning column 14 provided on the inner wall of the gear transmission cavity 16. The positioning column 14 rests on the end face of the gear column 20. The positioning column 14 ensures stability during the propulsion process, effectively reduces the vibration and deviation of the driving gear 11, and improves the stability and smoothness of the operation.

[0024] The outer end surface of the transmission gear 18 is provided with an inner hexagonal debugging hole 35, which makes operation more convenient and improves the convenience during maintenance.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A drawer manual propulsion mechanism, comprising a drawer base (1) and a drawer frame (2) movable forward and backward on the drawer base (1) by a manual cranking device (3), characterized in that: The hand-cranked device (3) comprises a hand-cranked propulsion body (6) fixed in the drawer frame (2) and a driving base (7) fixed on the drawer bottom frame (1), the hand-cranked propulsion body (6) comprises a main bracket (9), a worm assembly (10), a driving gear (11), a hand-cranked handle (12) connected to the driving gear (11), and a stroke limiter (13), the main bracket (9) is provided with a propulsion chamber (15) and a gear transmission chamber (16), the worm assembly (10) comprises a worm (17) rotatably arranged in the propulsion chamber (15) and a transmission gear (18) sleeved on the end of the worm (17) and placed in the gear transmission chamber (16), the driving gear (11) comprises a gear shaft (19), a gear shaft (19) arranged on the gear shaft, and a gear transmission chamber (16) arranged on the gear shaft. The driving gear (11) is rotatably arranged in the gear transmission cavity (16) and the gear large tooth portion (21) is meshed with the transmission gear (18). The travel limiter (13) includes a limiter mounting portion (24) fixed on the outer wall of the gear transmission cavity (16) and a limiter column (25) passing through the gear transmission cavity (16). The end of the gear column (20) is provided with an arc limiter groove (27) corresponding to the limiter column (25) and used for hand-cranking travel limit. The driving base (7) is provided with a base docking boss (28). The base docking boss (28) is provided with a transmission groove (29) threaded with the worm (17) at intervals.

2. The drawer manual propulsion mechanism according to claim 1, characterized in that: The hand crank (12) comprises a hand crank (30) and a rotating round handle (31) fixed to the end of the hand crank (30), and a gear docking hole (32) for the hand crank (30) to penetrate is provided at the center of the gear shaft (19).

3. The drawer manual propulsion mechanism according to claim 2, characterized in that: The hand crank (30) is provided with a hand crank section (33).

4. The drawer manual propulsion mechanism according to claim 1, characterized in that: The hand-cranked propulsion body (6) further includes a positioning column (14) provided on the inner wall of the gear transmission cavity (16), wherein the positioning column (14) abuts against the end surface of the gear column (20).

5. The drawer manual propulsion mechanism according to claim 1, characterized in that: The outer end surface of the transmission gear (18) is provided with a hexagonal debugging hole (35).

Images