Tool for installing eggbeater gear tightening spring
By designing a tooling for the gear tightening spring of an egg beater and utilizing the cooperation of a guide column and an auxiliary pressing piece, efficient assembly of the tightening spring is achieved, thus solving the problem of low efficiency in the prior art and reducing production costs.
Patent Information
- Application Number
- CN202510949711.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-09-09
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the assembly efficiency of the gear tightening spring of the egg beater is low, resulting in high production costs, and manual operation is difficult to ensure that the positioning hook of the tightening spring accurately enters the positioning groove.
A tooling structure including a lower die and an upper die is adopted. Through the cooperation of a guide column, a guide groove and an auxiliary pressing piece, it is ensured that the positioning hook of the tightening spring accurately enters the positioning groove of the gear shaft hole, and a pneumatic press is used to achieve rapid assembly.
The efficiency of tightening spring assembly has been improved. Operators can complete 500-600 springs per hour, which is about 10 times more efficient and reduces production costs.
Smart Images
Figure CN120606243A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an auxiliary tool for processing a micro motor, and more specifically, to a tool for installing a gear tightening spring of an egg beater. Background Art
[0002] Electric egg beaters are commonly used in food processing, primarily for whipping viscous mixtures such as egg liquid, syrup, and cheese. Their core components are the motor, gearbox, and mixing head. A spring is typically installed around the outer wall of the gear shaft hole where the gearbox and mixing head meet to prevent the mixing head from loosening during operation.
[0003] Although the tightening spring is installed in the annular groove, because the tightening spring generally has only a little more than one circle, the tightening spring will be displaced when inserting and removing the egg beating fork during use or when the motor is running. When the spring opening is located at the gear fork insertion position, the pull-out force and insertion force of the egg beating fork will change. In severe cases, the egg beating fork will not fall off freely when the fork is withdrawn, and it will be returned because it does not meet customer requirements. In more serious cases, the spring will be pulled out when the fork is withdrawn, causing it to lose its function.
[0004] Therefore, during the assembly process of the tie spring, the locating hook must be positioned within the locating groove. Currently, the assembly of the tie spring and gear is primarily performed manually using simple tooling, a method that is inefficient. Because the locating hook must be positioned within the locating groove while the tie spring is inserted into the annular groove, workers can only complete 50-60 units per hour, resulting in a high labor burden and significantly increasing production costs. Summary of the Invention
[0005] The object of the present invention is to address the deficiencies of the above-mentioned prior art and to provide a tool for installing a gear tightening spring for an egg beater, which has an ingenious structure, is easy to assemble and has high efficiency.
[0006] The technical solution of the present invention is implemented as follows: a tool for installing a gear tightening spring of an egg beater, comprising a lower mold and an upper mold that cooperate with each other, the lower mold comprising a positioning column adapted to the gear shaft hole on which the external tightening spring is to be installed, and a guide column adapted to the tightening spring and having a smaller upper portion and a larger lower portion is connected to the upper end of the positioning column; the outer diameter of the upper end of the guide column is smaller than the inner diameter of the tightening spring, and the outer diameter of the lower end is adapted to the outer diameter of the gear shaft on which the external tightening spring is to be installed.
[0007] The guide column and the upper part of the positioning column are axially provided with mutually penetrating clearance notches, the upper die includes a connecting seat connected to an external pneumatic press lifting seat, a lower pressing die head is connected to the connecting seat, a clearance hole matching the guide column is formed axially on the lower pressing die head, a lower pressing plate for pressing down the tightening spring is provided on the lower pressing die head at the opening of the clearance hole, auxiliary pressing plates are respectively provided on the lower pressing die heads on both sides of the lower pressing plate, and each auxiliary pressing plate is respectively connected to a radial elastic mechanism; one of the auxiliary pressing plates is opposite to the positioning hook at one end of the tightening spring and is located on the moving path of the positioning hook when it is expanded by the guide column.
[0008] During assembly, when the tightening spring is expanded by the guide column to cause the positioning hook at the free end to radially displace, the auxiliary pressing piece located on the side of the positioning hook limits its displacement and presses down into the positioning groove on the outer wall of the gear shaft hole, and at the same time the positioning hook enters the corresponding positioning groove.
[0009] In the above-mentioned tooling for installing the egg beater gear tightening spring, the outer walls of the guide columns on both sides of the clearance gap are provided with guide grooves along the axial direction; during assembly, the tightening spring is sleeved on the upper end of the guide column while the positioning hook of the free end of the tightening spring is located in one of the guide grooves.
[0010] In the above-mentioned tooling for installing the gear tightening spring of an egg beater, a first V-shaped guide opening is provided at the upper end of the clearance notch.
[0011] In the above-mentioned tooling for installing the gear tightening spring of an egg beater, a second V-shaped guide opening is provided at the upper end of the guide groove.
[0012] In the above-mentioned tooling for installing the egg beater gear tightening spring, the radial elastic mechanism includes a hollow mounting seat fixedly connected to the lower pressure die head, a slider is slidably arranged in the mounting seat, and a reset spring is arranged between the rear end surface of the slider and the mounting seat.
[0013] The auxiliary pressing piece is fixedly connected to the front end surface of the slider, and a clearance hole matched with the auxiliary pressing piece is provided on the lower pressing die head.
[0014] In the above-mentioned tooling for installing the egg beater gear tightening spring, the mounting seat is a tubular structure, and a through positioning long hole is radially arranged at the proximal end of the mounting seat away from the lower pressure die head, and a positioning plate is inserted in the positioning long hole. A limiting protrusion is provided on the positioning plate located in the mounting seat, and the height of the limiting protrusion is greater than the width of the positioning long hole.
[0015] In the above-mentioned tooling for installing the gear tightening spring of an egg beater, one of the auxiliary pressing plates is located on the perpendicular bisector of the lower pressing plate.
[0016] Another auxiliary pressing piece is located on the side of the vertical bisector of the lower pressing piece and its free end faces the center of the lower pressing piece. The side where the auxiliary pressing piece is located is on the moving path of the tightening spring positioning hook when it is expanded by the guide column.
[0017] With this structure, the lower die guides the tie spring, while the upper die and its lower pressing plate press down on it. Simultaneously, an auxiliary pressing plate assists in pressing down the tie spring and limits the movement of the positioning hook. This ensures that the positioning hook precisely enters the annular groove outside the gear shaft hole when the tie spring enters, greatly improving work efficiency. Operators can now assemble 500-60 units per hour, up from 50-60 units previously, a tenfold increase in efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.
[0019] Figure 1 It is a schematic diagram of the decomposition structure of the present invention; Figure 2 It is a structural schematic diagram of the lower mold of the present invention; Figure 3 It is a structural schematic diagram of the upper mold of the present invention; Figure 4 yes Figure 3 Schematic diagram of radial cross-section structure of the position of the mid-radial elastic mechanism; Figure 5 It is a schematic diagram of the upper die, lower die, spring to be pressed in and gear in the initial downward position of the present invention; Figure 6 yes Figure 5 A side structural diagram of Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle; Figure 8 This is a schematic diagram of the upper die, lower die, spring to be pressed in, and gear when they are pressed down to about to be in place; Figure 9 yes Figure 8 A side structural diagram of Figure 10 yes Figure 9 Schematic diagram of the cross-sectional structure at the middle BB; In the figure: 1. Lower die; 1a. Positioning column; 1b. Guide column; 1c. Clearance notch; 1d. Guide groove; 1e. First V-shaped guide opening; 1f. Second V-shaped guide opening; 2. Upper die; 2a. Connecting seat; 2b. Lower pressing die head; 2c. Clearance hole; 2d. Lower pressing plate; 2e. Auxiliary pressing plate; 3. Radial elastic mechanism; 3a. Mounting seat; 3b. Slider; 3c. Return spring; 3d. Positioning long hole; 3e. Positioning plate; 3f. Limiting protrusion; 4. Gear; 4a. Notch; 4b. Positioning groove; 5. Tightening spring; 5a. Positioning hook. DETAILED DESCRIPTION
[0020] See Figures 1 to 4 As shown, a tool for installing a gear tightening spring of an egg beater according to the present invention comprises a lower die 1 and an upper die 2 that cooperate with each other, the lower die 1 comprises a positioning column 1a adapted to the gear shaft hole on which the external tightening spring is to be installed, and a guide column 1b adapted to the tightening spring and having a smaller upper portion and a larger lower portion is connected to the upper end of the positioning column 1a; the outer diameter of the upper end of the guide column 1b is smaller than the inner diameter of the tightening spring, and the outer diameter of the lower end is adapted to the outer diameter of the gear shaft on which the external tightening spring is to be installed.
[0021] The guide column 1b and the positioning column 1a are provided with mutually penetrating clearance notches 1c along the axial direction on the upper part. The upper mold 2 includes a connecting seat 2a connected to the external pneumatic press lifting seat. Of course, the pneumatic press can also adopt a conventional hand beer machine in this field, etc., depending on the specific situation. This external equipment is not the technical point to be protected by the present invention and will not be repeated here.
[0022] A lower pressing die 2b is connected to the connecting seat 2a, and a clearance hole 2c that cooperates with the guide column 1b is formed axially on the lower pressing die 2b. A lower pressing piece 2d for pressing down the tightening spring is provided on the lower pressing die 2b at the opening of the clearance hole 2c, and auxiliary pressing pieces 2e are respectively provided on the lower pressing die 2b on both sides of the lower pressing piece 2d, and each auxiliary pressing piece 2e is respectively connected to a radial elastic mechanism 3; one of the auxiliary pressing pieces 2e is opposite to the positioning hook portion at one end of the tightening spring and is located on the moving path of the positioning hook portion when it is expanded by the guide column 1b.
[0023] During assembly, when the tightening spring is expanded by the guide column 1b and the positioning hook at the free end undergoes radial displacement, the auxiliary pressing piece 2e located on the side of the positioning hook limits its displacement and presses down into the positioning groove on the outer wall of the gear shaft hole, and at the same time the positioning hook enters the corresponding positioning groove.
[0024] Preferably, the outer wall of the guide post 1b on either side of the clearance notch 1c is provided with guide grooves 1d along the axial direction. During assembly, the tie-down spring is positioned over the upper end of the guide post 1b, with the locating hook at the free end of the tie-down spring positioned within one of the guide grooves 1d. Guided by the guide grooves, the locating hook of the tie-down spring can initially be in a relatively fixed position, facilitating accurate entry into the locating groove during subsequent downward pressure.
[0025] Preferably, a first V-shaped guide opening 1e is provided at the upper end of the clearance notch 1c to facilitate the downward movement of the lower pressing sheet during mold closing.
[0026] Preferably, a second V-shaped guide opening 1f is provided at the upper end of the guide groove 1d. The second V-shaped guide opening has the same function as the first V-shaped guide opening, which is to guide and assist the downward movement of the pressing sheet during mold closing.
[0027] In this embodiment, the radial elastic mechanism 3 includes a hollow mounting seat 3a fixedly connected to the lower pressing die head 2b, a slider 3b is slidably arranged in the mounting seat 3a, and a return spring 3c is arranged between the rear end surface of the slider 3b and the mounting seat 3a.
[0028] The auxiliary pressing piece 2e is fixedly connected to the front end of the slider 3b. A clearance hole 2c is provided in the pressing die 2b to accommodate the auxiliary pressing piece 2e. A radial elastic mechanism is provided to allow the auxiliary pressing piece to adapt to the outer diameter of the guide post, which decreases at the top and increases at the bottom. It expands and contracts accordingly, ensuring constant contact with the outer wall of the guide post, thereby ensuring that the tightening spring can be pressed downward.
[0029] Preferably, the mounting seat 3a is a tubular structure, with a radially extending positioning slot 3d formed at the proximal end of the mounting seat 3a distal from the lower pressing die 2b. A positioning plate 3e is inserted into the positioning slot 3d. Positioning tabs 3f are provided on the positioning plate 3e within the mounting seat 3a. The height of the positioning tabs 3f is greater than the width of the positioning slot. The cooperation between the positioning slot and the positioning plate facilitates installation and ensures proper positioning of the return spring.
[0030] Further preferably, one auxiliary pressing piece 2e is located on the perpendicular bisector of the lower pressing piece 2d; the other auxiliary pressing piece 2e is located to the side of the perpendicular bisector of the lower pressing piece 2d, with its free end facing the center of the lower pressing piece 2d. The side on which the auxiliary pressing piece 2e is located is in the movement path of the cinching spring positioning hook when it is expanded by the guide column 1b. The arrangement of these auxiliary pressing pieces ensures that the positioning hook does not move when the cinching spring is expanded by force, thereby accurately entering the positioning groove on the outer wall of the gear shaft hole.
[0031] See Figures 5 to 10As shown, when using the pneumatic press, first securely connect the upper die to the lift base of the pneumatic press. Insert the lower die into the shaft hole of the gear 4 where the tie-down spring 5 is to be installed. Manually align the clearance notch with the notch 4a in the shaft hole, and align the guide groove where the positioning hook 5a is located with the positioning groove 4b on the shaft of the gear where the tie-down spring is to be installed. Next, place the gear where the tie-down spring is to be installed on the horizontal slide below the lift base of the pneumatic press. The horizontal slide brings the gear to the bottom of the upper die, and the pneumatic press is activated to quickly complete the assembly of a tie-down spring.
[0032] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field can, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical contents disclosed in the present invention and make equivalent embodiments without departing from the technical features of the present invention. Such modifications still fall within the scope of the technical features of the present invention.
Claims
1. A tool for installing a gear tightening spring of an egg beater, comprising a lower die (1) and an upper die (2) that cooperate with each other, characterized in that: The lower die (1) comprises a positioning column (1a) adapted to the gear shaft hole of the external tightening spring to be installed, and a guide column (1b) adapted to the tightening spring and having a smaller upper portion and a larger lower portion is connected to the upper end of the positioning column (1a); the outer diameter of the upper end of the guide column (1b) is smaller than the inner diameter of the tightening spring, and the outer diameter of the lower end is adapted to the outer diameter of the gear shaft of the external tightening spring to be installed; The guide column (1b) and the positioning column (1a) are provided with mutually interpenetrating clearance notches (1c) along the axial direction on their upper parts. The upper die (2) includes a connecting seat (2a) connected to an external pneumatic press lifting seat. A lower pressing die head (2b) is connected to the connecting seat (2a). A clearance hole (2c) that matches the guide column (1b) is formed axially on the lower pressing die head (2b). A lower pressing plate (2d) for pressing down a tightening spring is provided on the lower pressing die head (2b) at the opening of the clearance hole (2c). Auxiliary pressing plates (2e) are provided on the lower pressing die head (2b) on both sides of the lower pressing plate (2d). Each auxiliary pressing plate (2e) is connected to a radial elastic mechanism (3). One of the auxiliary pressing plates (2e) is opposite to the positioning hook at one end of the tightening spring and is located on the moving path of the positioning hook when it is expanded by the guide column (1b). During assembly, when the tightening spring is expanded by the guide column (1b) to cause the positioning hook portion at the free end to undergo radial displacement, the auxiliary pressing piece (2e) located on the side of the positioning hook portion limits its displacement and presses it down into the positioning groove on the outer wall of the gear shaft hole, and at the same time, the positioning hook portion enters the corresponding positioning groove.
2. A tool for installing a gear tightening spring of an egg beater according to claim 1, characterized in that: The outer walls of the guide posts (1b) on both sides of the clearance notch (1c) are provided with guide grooves (1d) along the axial direction; during assembly, the tightening spring is sleeved on the upper end of the guide post (1b) while the positioning hook portion of the free end of the tightening spring is located in one of the guide grooves (1d).
3. A tool for installing a gear tightening spring of an egg beater according to claim 1, characterized in that: A first V-shaped guide opening (1e) is provided at the upper end of the clearance gap (1c).
4. A tool for installing a gear tightening spring of an egg beater according to claim 2, characterized in that: A second V-shaped guide opening (1f) is provided at the upper end of the guide groove (1d).
5. A tool for installing a gear tightening spring of an egg beater according to claim 1, characterized in that: The radial elastic mechanism (3) comprises a hollow mounting seat (3a) fixedly connected to the lower pressing die head (2b), a slider (3b) slidably arranged in the mounting seat (3a), and a return spring (3c) is arranged between the rear end surface of the slider (3b) and the mounting seat (3a); The auxiliary pressing piece (2e) is fixedly connected to the front end surface of the slider (3b), and a clearance hole (2c) matching the auxiliary pressing piece (2e) is provided on the lower pressing die head (2b).
6. A tool for installing a gear tightening spring of an egg beater according to claim 5, characterized in that: The mounting seat (3a) is a tubular structure, and a through positioning long hole (3d) is radially provided at the proximal end of one end of the mounting seat (3a) away from the lower pressing die head (2b), a positioning plate (3e) is inserted into the positioning long hole (3d), and a limiting protrusion (3f) is provided on the positioning plate (3e) located in the mounting seat (3a), and the height of the limiting protrusion (3f) is greater than the width of the positioning long hole ().
7. A tool for installing a gear tightening spring of an egg beater according to claim 1, characterized in that: One of the auxiliary pressing pieces (2e) is located on a perpendicular bisector of the lower pressing piece (2d); Another auxiliary pressing plate (2e) is located on the side of the perpendicular bisector of the lower pressing plate (2d) and its free end faces the center of the lower pressing plate (2d). The side where the auxiliary pressing plate (2e) is located is on the moving path of the tightening spring positioning hook when it is expanded by the guide column (1b).