An angle-adjustable tool

Abstract

The utility model discloses a kind of automatically adjustable angle tool, including bottom plate, support seat, bearing seat, screw rod, sliding block, connecting rod, adjusting seat, workbench, motor, anti-overload mechanism, worm gear drive structure and angle display. Motor is rotated by anti-overload mechanism drive screw rod, screw rod drives sliding block to move along axial direction, sliding block is driven adjusting seat to realize with X axis as center's elevation adjustment by connecting rod;Arc-shaped recess is set on adjusting seat, workbench bottom is equipped with arc-shaped rod and is slidably installed in recess, precision rotation in Y axis direction is realized by rotating worm drive worm gear tooth;Anti-overload mechanism can automatically separate when screw rod is blocked to prevent overload impact;Angle display is used for real-time measurement adjusting seat's rotation angle. The tool can realize the automatic adjustment and accurate control of multi-axis angle, with compact structure, safe and reliable, the advantages of high adjustment precision and convenient operation, suitable for machining, welding, detection and a variety of process occasions.

Description

Technical Field

[0001] This utility model belongs to the field of tooling technology, specifically relating to an automatically adjustable angle tooling. Background Technology

[0002] In machining, welding, inspection, and assembly processes, tooling is typically used to position, support, and fix the workpiece to ensure machining accuracy and operational stability. With the diversification and complexity of machining processes, many parts require operation at different angles during machining or inspection. Therefore, tooling structures capable of flexible angle adjustment have become essential auxiliary equipment. Currently, most common angle adjustment tooling uses manual knobs, pin locking, or gear engagement to achieve angle adjustment. These structures have certain shortcomings in terms of adjustment accuracy and automated control.

[0003] Existing angle adjustment fixtures generally suffer from the following problems: First, angle adjustment usually relies on manual operation, which involves loosening the locking bolts, manually rotating to position, and then locking them back in place. This is not only inefficient but also results in poor angle repeatability, making it difficult to meet the needs for continuous or high-precision angle adjustment. Second, although some fixtures achieve angle control through motor-driven lead screws, they are prone to overload impacts at extreme positions, leading to damage to the drive mechanism or jamming of transmission components, thus reducing the reliability of the equipment. Third, existing angle adjustment structures are relatively simple in multi-axis linkage control, usually only able to achieve single-direction adjustment, and cannot simultaneously and precisely control the X and Y axes, which is not conducive to rapid switching and positioning of angles in complex spaces.

[0004] Furthermore, the lack of an effective overload protection mechanism during angle adjustment is also a major reason for the shortened service life of the tooling. When the motor continuously outputs torque while the lead screw rotation is obstructed, strong mechanical impacts can easily occur between the transmission components, causing thread damage or motor overheating. Moreover, traditional structures lack angle measurement and display devices, requiring operators to rely on experience to judge the angle position, resulting in significant angle control errors and unreliable adjustment accuracy. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide an automatically adjustable angle tooling that can realize multi-axis automatic angle adjustment and has overload protection and angle measurement functions, so as to improve the safety, adjustment accuracy and ease of operation of the tooling.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatically adjustable angle fixture includes a base plate, a support seat is laterally arranged at the center of the upper surface of the base plate, bearing seats are symmetrically arranged on the top of the support seat, a lead screw is rotatably installed between the two bearing seats, and a motor is arranged on one side of the top of the base plate to control the lead screw.

[0008] The base plate has upright plates symmetrically arranged on one side of its upper surface. An adjustment seat is rotatably installed above the upright plates. A slider is screwed onto the surface of the lead screw. A connecting rod is hinged to the top of the slider. The top of the connecting rod is hinged to the bottom of the adjustment seat.

[0009] A worktable is rotatably mounted above the adjustment seat;

[0010] An overload protection mechanism is provided between the motor and the lead screw.

[0011] Furthermore, the upper surface of the adjustment seat is provided with an arc-shaped concave surface, and the inner side of the arc-shaped concave surface is provided with arc-shaped grooves evenly, and the bottom of the worktable is provided with arc-shaped rods evenly, which slide inside the arc-shaped grooves.

[0012] Furthermore, the adjustment seat has an inner cavity laterally opened at its center, and the inner cavity is connected to the arc-shaped groove at the center position, wherein the surface of the arc-shaped rod placed at the center is uniformly provided with worm gear teeth.

[0013] Furthermore, a worm gear is rotatably mounted on the inner side of the inner cavity, the worm gear meshes with the worm wheel teeth, and a knob is provided at the end of the worm gear, the knob being located outside the adjustment seat.

[0014] Furthermore, a limiting rod is symmetrically and rotatedly installed on the inner side of the inner cavity. The limiting rod is parallel to the axis of the arc-shaped concave surface, and the two limiting rods are used to limit the arc-shaped rod to prevent it from detaching.

[0015] Furthermore, one of the uprights is provided with an angle display at its top, the angle display being connected to the rotation axis of the adjustment seat.

[0016] Furthermore, a square rod is provided at one end of the lead screw near the motor, and the overload protection mechanism includes a bushing fixed on the output end of the motor and a slide cylinder that slides on the surface of the square rod. The end face of the bushing is symmetrically provided with a C-shaped docking groove.

[0017] Furthermore, a spring is fitted onto the surface of the square rod, and the spring is placed between the slide cylinder and the end face of the lead screw. The spring applies pressure to the slide cylinder in the direction of the motor.

[0018] The slide cylinder surface is symmetrically provided with docking bolts, which are adapted to C-shaped docking grooves.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention utilizes an automatic drive mechanism comprised of a support base, bearing housing, lead screw, and motor on a base plate. This enables electrically controlled adjustment, solving the problem of traditional angle fixtures relying on manual rotation of the lead screw for adjustment. The motor drives the lead screw to rotate, causing the slider to move smoothly axially under the action of the lead screw thread. The slider then drives the adjustment seat via a connecting rod to adjust the elevation angle, thus achieving automated control of angle adjustment. This structure effectively improves adjustment efficiency, reduces operator workload, ensures smooth angle changes and accurate repeatability, and avoids angle errors caused by manual operation.

[0021] This invention incorporates an overload protection mechanism between the motor and the lead screw, enabling automatic disengagement when the lead screw's rotation is obstructed, thus preventing damage to the motor or threads caused by overload impact. The overload protection mechanism utilizes a separable connection structure formed by a slide cylinder, bushing, mating groove, mating bolt, and spring. When the motor's output torque exceeds a set value, it automatically disconnects power transmission, preventing further lead screw rotation. This structure effectively solves the problem of impact and jamming caused by overload at extreme positions in traditional rigid motor connection mechanisms, improving the safety and stability of the system and extending the device's service life.

[0022] This invention utilizes two vertical plates to form a stable double-support structure, enabling the adjusting seat to maintain good balance and uniform force distribution during rotation, avoiding the wobbling or tilting problems that occur with traditional single-support structures. The slider and lead screw are connected by a high-precision threaded pair, and together with the connecting rod, linear motion is converted into rotational motion, realizing the elevation angle change of the adjusting seat around the X-axis. The entire movement process is stable and reliable. This structure not only enhances the controllability of angle adjustment but also improves the adaptability of the tooling under various working conditions.

[0023] This invention features an arc-shaped concave surface and an arc-shaped groove structure on the adjustment seat, and an arc-shaped rod at the bottom of the worktable for sliding, allowing the worktable to rotate smoothly along an arc-shaped trajectory. This solves the problems of limited rotation range and uneven force distribution in traditional angle adjustment mechanisms. The arc-shaped structure makes angle adjustment more continuous and precise, and provides a wider force-bearing surface, effectively improving the stability of angle holding. Through this structure, the fixture can meet the multi-angle positioning requirements under complex spatial postures, improving the flexibility of parts processing and inspection. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the formal structure of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 3This is a schematic diagram of the installation structure of the lead screw and anti-collision mechanism of this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the adjustment seat and workbench installation structure of this utility model.

[0028] Figure 5 This is a schematic diagram of the anti-collision mechanism of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Base plate; 11. Support seat; 12. Bearing seat; 13. Vertical plate; 14. Motor; 2. Lead screw; 21. Square rod; 3. Slider; 4. Connecting rod; 5. Adjusting seat; 51. Inner cavity; 52. Arc-shaped concave surface; 53. Arc-shaped groove; 54. Limiting rod; 6. Worktable; 61. Arc-shaped rod; 62. Worm gear; 7. Worm; 8. Overload protection mechanism; 81. Bushing; 82. C-shaped docking groove; 83. Slide cylinder; 84. Docking bolt; 85. Spring; 9. Angle display. Detailed Implementation

[0031] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0032] refer to Figures 1 to 5 As shown, an automatically adjustable angle tooling includes a base plate 1, a support seat 11 is horizontally arranged at the center of the upper surface of the base plate 1, a bearing seat 12 is symmetrically arranged on the top of the support seat 11, a lead screw 2 is rotatably installed between the two bearing seats 12, and a motor 14 is arranged on one side of the top of the base plate 1 to control the lead screw 2.

[0033] Existing tooling often relies solely on manual rotation of the lead screw structure to adjust the elevation angle, resulting in low efficiency and limited accuracy. This is especially problematic when the angle range is large or the load is heavy, leading to high operator workload and accumulated positioning errors. This invention addresses this issue by installing a motor 14 on the top of the base plate 1, which works in conjunction with the lead screw 2 to form an electric drive system. The motor 14 transmits power to the lead screw 2 through an overload protection mechanism 8, ensuring stable rotation of the lead screw 2. The rotation of the lead screw 2 causes the slider 3 to slide axially, thereby adjusting the angle of the upper structure. The support base 11 and bearing seat 12 provide rotational support and axial constraint for the lead screw 2, resulting in high rotational accuracy and smooth operation. This effectively improves the control sensitivity and repeatability of the tooling during automatic angle adjustment. The base plate 1 provides a stable foundation for the entire structure, ensuring reliable operation of the device under working loads.

[0034] A vertical plate 13 is symmetrically arranged on one side of the upper surface of the base plate 1. An adjustment seat 5 is rotatably installed above the vertical plate 13. A slider 3 is screwed onto the surface of the lead screw 2. A connecting rod 4 is hinged to the top of the slider 3. The top of the connecting rod 4 is hinged to the bottom of the adjustment seat 5.

[0035] Existing angle adjustment devices mostly use single-point support or single-axis rotation to control the angle. While the structure is simple, the load is uneven, easily causing tilting and swaying. In this design, two vertical plates 13 are respectively mounted vertically on the base plate 1, jointly supporting the rotating shaft of the adjustment seat 5, forming a stable double-support structure. When the lead screw 2 rotates, driving the slider 3 to move along the axial direction, the linear motion is converted into the rotational motion of the adjustment seat 5 via the connecting rod 4, thereby achieving the elevation angle adjustment of the adjustment seat 5 centered on the X-axis. This structure can maintain good mechanical stability while achieving angle conversion. The connecting rod 4 is made of high-strength steel to prevent deformation during force transmission. The slider 3 and the lead screw 2 are connected by a threaded pair, and the precise clearance reduces adjustment errors caused by backlash. The overall elevation angle is controllable through the cooperation of the vertical plates 13, slider 3, connecting rod 4, and adjustment seat 5.

[0036] A worktable 6 is mounted on top of the adjusting seat 5.

[0037] In traditional angle tooling, the worktable often adopts a fixed structure, which cannot flexibly adjust the angle in multiple axes, resulting in limited clamping angles for parts and difficulty in achieving complex posture machining. The worktable 6 of this utility model is mounted on the adjusting seat 5 through a rolling pair structure, realizing low-friction rotational cooperation between the worktable and the adjusting seat. The upper surface of the worktable 6 is uniformly provided with T-shaped slide grooves for quick clamping of parts of different shapes, improving the adaptability and versatility of the tooling. The worktable 6 and the adjusting seat 5 are connected by an arc structure to achieve rotational adjustment around the Y-axis, enabling the workpiece to achieve dual-axis angle adjustment in space. The overload protection mechanism 8 set between the motor 14 and the lead screw 2 provides safety protection, and can automatically separate to prevent mechanical damage when the transmission resistance exceeds the set threshold.

[0038] refer to Figure 1 and Figure 4 As shown, the upper surface of the adjusting seat 5 is provided with an arc-shaped concave surface 52, and the inner side of the arc-shaped concave surface 52 is provided with arc-shaped grooves 53 evenly. The bottom of the worktable 6 is provided with arc-shaped rods 61 evenly, and the arc-shaped rods 61 slide on the inner side of the arc-shaped grooves 53.

[0039] Existing angle adjustment structures often rely on planar rotary joints or pin connections, resulting in limited rotational stroke and uneven force distribution. This solution utilizes the combination of an arc-shaped concave surface 52 and an arc-shaped groove 53 to form an arc-shaped guide structure, enabling the worktable 6 to rotate smoothly along an arc-shaped trajectory. The arc-shaped rod 61 is embedded inside the arc-shaped groove 53, forming a stable rolling contact pair, which ensures smooth rotation and effectively prevents table wobbling. The curvature of the arc-shaped concave surface 52 matches the radius of the arc-shaped rod 61, ensuring uniform force distribution during rotation and improving adjustment accuracy and angle stability. This structure achieves multi-angle continuous adjustment, overcoming the segmented and discontinuous defects of existing tooling angle adjustments.

[0040] refer to Figure 4 As shown, an inner cavity 51 is laterally opened in the center of the adjusting seat 5. The inner cavity 51 is connected to the arc-shaped groove 53 at the center position. The surface of the arc-shaped rod 61 placed in the center is uniformly provided with worm gear teeth 62.

[0041] Most existing angle rotation mechanisms rely on friction locking or pin limiting for fixation, which is cumbersome to operate and prone to loosening. In this solution, the arc-shaped rod 61 is equipped with worm gear teeth 62, and the inner cavity 51 can be used to arrange the transmission worm 7 to form a worm gear pair structure. This transmission method can achieve precise angle control and utilize the self-locking characteristics of the worm gear transmission to prevent the worktable 6 from rotating under load. The inner cavity 51 is not only used for the arrangement of transmission components, but also provides installation space for the limiting rod and protective structure, making the entire mechanism compact and reasonable.

[0042] refer to Figure 4 As shown, a worm 7 is rotatably mounted on the inner side of the inner cavity 51. The worm 7 meshes with the worm gear teeth 62. A knob is provided at the end of the worm 7 and is located on the outside of the adjustment seat 5.

[0043] In existing tooling, the angle fine-tuning mechanism often uses external bolt rotation, which results in low adjustment accuracy and inconvenient operation. This utility model sets up a worm gear 7 that meshes with a worm wheel tooth 62, allowing for angle fine-tuning by rotating a knob at the end. The operator can rotate the worm gear 7 by turning the knob, which in turn drives the worm wheel tooth 62 to rotate and move the arc-shaped rod 61, achieving continuous rotation of the worktable 6 in the Y-axis direction. The transmission ratio of the worm gear can be designed from 1:40 to 1:60 to meet different precision adjustment scenarios. This design not only improves operational flexibility but also ensures that the angle of the worktable will not slip under load through the self-locking characteristic of the worm gear transmission.

[0044] refer to Figure 4 As shown, a limiting rod 54 is symmetrically rotated and installed on the inner side of the inner cavity 51. The limiting rod 54 is parallel to the axis of the arc-shaped concave surface 52. The two limiting rods 54 are used to limit the arc-shaped rod 61 to prevent it from falling off, so that the arc-shaped rod 61 can only slide inside the arc-shaped groove 53.

[0045] Traditional structures are prone to guide component dislodging during large-angle rotation, causing the worktable to shift or tilt. To solve this problem, this solution sets two limiting rods 54 to laterally constrain the arc-shaped rod 61. The limiting rods 54 are fixedly connected to the adjusting seat 5 by threads, and their positions can be finely adjusted as needed to ensure the trajectory accuracy of the arc-shaped rod 61 during rotation. This structure effectively prevents the arc-shaped rod 61 from dislodging from the arc-shaped groove 53, improving the operational safety and stability of the entire mechanism.

[0046] refer to Figure 1 and Figure 2 As shown, an angle display 9 is provided on the top of one of the upright plates 13, and the angle display 9 is connected to the rotation shaft of the adjustment seat 5.

[0047] Existing tooling often relies on manual visual inspection or mechanical calibration to determine angles, resulting in significant errors and the inability to achieve real-time monitoring. To address this issue, this solution installs an angle display 9 on the top of the vertical plate 13. The angle display 9 is connected to an axis to measure the rotation angle of the adjustment seat 5 in real time. The display can be an electronic angle sensor or a digital angle meter structure, capable of outputting signals and displaying values ​​instantly when the angle changes. This structure improves the visibility of angle adjustment, allowing operators to accurately control the angle position and avoid human error.

[0048] refer to Figure 3 and Figure 5 As shown, a square rod 21 is provided at one end of the lead screw 2 near the motor 14. The overload protection mechanism 8 includes a bushing 81 fixed on the output end of the motor 14 and a slide cylinder 83 sliding on the surface of the square rod 21. A C-shaped docking groove 82 is symmetrically opened on the end face of the bushing 81.

[0049] In traditional structures, the motor and lead screw are rigidly connected, which can easily lead to impact overload at extreme positions, damaging the transmission components. This solution eliminates this risk by setting an anti-overload mechanism 8. The bushing 81 is coaxially fixed with the output end of the motor 14, and the slide cylinder 83 can slide along the axial direction of the square rod 21 and is detachably connected to the docking bolt 84 through the C-shaped docking groove 82. When the rotation of the lead screw 2 is obstructed, the slide cylinder 83 can instantly disengage from the C-shaped docking groove 82 under the action of the spring 85, thereby cutting off the power transmission and preventing overload impact. This structure effectively improves the safety and reliability of the transmission system.

[0050] refer to Figure 3 and Figure 5 As shown, a spring 85 is sleeved on the surface of the square rod 21. The spring 85 is placed between the slide cylinder 83 and the end face of the lead screw 2. The spring 85 applies pressure to the slide cylinder 83 in the direction of the motor 14. The slide cylinder 83 is symmetrically provided with docking bolts 84, which are adapted to the C-shaped docking groove 82.

[0051] Traditional drive mechanisms often lack elastic buffer devices under obstructed conditions, causing impact energy to be directly transmitted to the motor and lead screw. This invention, by setting a spring 85 on the surface of the square rod 21, ensures that the slide cylinder 83 is always subjected to elastic thrust and maintains stable docking during normal operation. When the transmission resistance exceeds the set value, the spring 85 is compressed, and the slide cylinder 83 drives the docking bolt 84 to disengage from the C-shaped docking groove 82, thereby cutting off the transmission path and achieving anti-collision protection. This overload protection structure can automatically reset after overload without manual intervention, significantly extending the service life of the lead screw mechanism and motor, and improving the safety and maintainability of the overall system.

[0052] The working principle of this utility model is as follows: the overload protection mechanism 8 can transmit the power of the motor 14 to the lead screw 2 to control the rotation of the lead screw 2. The rotation of the lead screw 2 can control the slider 3 to move axially. Since one end of the adjusting seat 5 rotates between the two vertical plates 13, when the slider 3 moves axially, the rotation of the adjusting seat 5 can be controlled by the connecting rod 4, thereby adjusting the elevation angle of the adjusting seat 5 to rotate around the X-axis. The surface of the worktable 6 is evenly provided with T-shaped grooves for fixing parts. The arc rod 61 is placed inside the arc groove 53 so that the entire worktable 6 can rotate along the axis of the arc groove 53. By rotating the knob at the end of the worm 7, the entire rotation of the worktable 6 can be controlled by the meshing of the worm 7 and the worm gear 62, thereby controlling the rotation of the worktable 6 around the Y-axis. The self-locking property of the worm gear is used to maintain the stability of the angle of the worktable 6. By adjusting the rotation in two different directions, the angle of the worktable 6 can be flexibly controlled, improving the practicality of the tooling.

[0053] Under normal conditions, due to the thrust of the spring 85 on the slide 83, the bolt 84 enters the C-shaped docking groove 82. At this time, the power of the motor 14 can control the rotation of the lead screw 2. When the rotation angle reaches the limit, the rotation of the lead screw 2 is blocked, and the bushing 81 and the slide 83 separate due to the resistance. The bolt 84 disengages from the C-shaped docking groove 82. At this time, the lead screw 2 cannot continue to rotate to prevent the occurrence of an impact. The angle of the adjusting seat 5 is measured in real time by the angle display 9 for adjustment.

[0054] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An automatically adjustable angle fixture, comprising a base plate (1), characterized in that: A support seat (11) is horizontally arranged at the center of the upper surface of the base plate (1). A bearing seat (12) is symmetrically arranged on the top of the support seat (11). A lead screw (2) is rotatably installed between the two bearing seats (12). A motor (14) is arranged on one side of the top of the base plate (1). The motor (14) is used to control the lead screw (2). The base plate (1) has vertical plates (13) symmetrically arranged on one side of its upper surface. An adjustment seat (5) is rotatably installed between the vertical plates (13). A slider (3) is screwed onto the surface of the lead screw (2). A connecting rod (4) is hinged to the top of the slider (3). The top of the connecting rod (4) is hinged to the bottom of the adjustment seat (5). A worktable (6) is rotatably mounted above the adjusting seat (5); An overload protection mechanism (8) is provided between the motor (14) and the lead screw (2).

2. The automatically adjustable angle fixture according to claim 1, characterized in that: The upper surface of the adjustment seat (5) is provided with an arc-shaped concave surface (52), and the inner side of the arc-shaped concave surface (52) is provided with an arc-shaped groove (53). The bottom of the worktable (6) is provided with an arc-shaped rod (61), and the arc-shaped rod (61) slides on the inner side of the arc-shaped groove (53).

3. The automatically adjustable angle fixture according to claim 2, characterized in that: The adjusting seat (5) has an inner cavity (51) horizontally opened in the center. The inner cavity (51) is connected to the arc-shaped groove (53) at the center position. The surface of the arc-shaped rod (61) placed at the center is uniformly provided with worm gear teeth (62).

4. The automatically adjustable angle fixture according to claim 3, characterized in that: A worm gear (7) is rotatably mounted inside the inner cavity (51). The worm gear (7) meshes with the worm wheel teeth (62). A knob is provided at the end of the worm gear (7) and is located outside the adjustment seat (5).

5. The automatically adjustable angle fixture according to claim 4, characterized in that: The inner cavity (51) is symmetrically rotated and installed with limiting rods (54). The limiting rods (54) are parallel to the axis of the arc concave surface (52). The two limiting rods (54) are used to limit the arc rod (61) to prevent it from falling off.

6. The automatically adjustable angle fixture according to claim 1, characterized in that: An angle display (9) is provided on the top of one of the upright plates (13), and the angle display (9) is connected to the rotation axis of the adjustment seat (5).

7. The automatically adjustable angle fixture according to claim 1, characterized in that: The lead screw (2) has a square rod (21) at one end near the motor (14). The overload protection mechanism (8) includes a bushing (81) fixed on the output end of the motor (14) and a slide cylinder (83) sliding on the surface of the square rod (21). The bushing (81) has a C-shaped docking groove (82) symmetrically opened on its end face.

8. The automatically adjustable angle fixture according to claim 7, characterized in that: A spring (85) is sleeved on the surface of the square rod (21). The spring (85) is placed between the slide cylinder (83) and the end face of the lead screw (2). The spring (85) applies pressure to the slide cylinder (83) in the direction of the motor (14). The sliding cylinder (83) is symmetrically provided with docking bolts (84), which are adapted to the C-shaped docking groove (82).

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