A fast and accurate positioning woodworking protractor structure and positioning method thereof

Abstract

The present invention provides a woodworking protractor structure and a positioning method for fast and accurate positioning. The present invention has the following beneficial effects: the present invention uses an elastic member to swing a positioning pin fixed at the front end of a swing positioning block, and the positioning pin is inserted into a positioning slot below a scale plate. The two side walls of the positioning slot are inclined surfaces, forming a V-shaped structure. The positioning pin is circular. When the positioning pin slides to the edge of the positioning slot, the positioning pin can be quickly inserted into the positioning slot, and can contact any position of the two side walls of the slot. The positioning speed is fast and the positioning accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of woodworking machinery, and in particular to a fast and accurate positioning woodworking protractor structure and a positioning method thereof. Background Art

[0002] See also Figure 1 As shown, the existing quick positioning structure of the woodworking protractor is generally implemented in the form of a slot (hole) and a latch, and its working principle is as follows: the quick positioning slot 101 is arranged on the arc end surface of the dial 102, and the latch 104 inserted in the slot is pulled out through the handle 103, so that the dial 102 can be rotated to another positioning slot, and then the handle is loosened to allow the latch 104 to be reinserted into the new quick positioning slot 101 to achieve quick positioning.

[0003] This positioning method requires manual plugging and unplugging each time a new positioning angle is changed, and the operation speed is slow. On the other hand, since the latch 104 moves back and forth in the fixing seat through the handle 103, there is a gap between the latch 104 and the fixing seat, resulting in low positioning accuracy of this positioning method.

[0004] In order to improve the rapid positioning accuracy of the protractor, the existing positioning method can only rely on continuously increasing the processing accuracy, which undoubtedly increases the processing cost of the product. In addition, each time a new positioning angle is changed, manual plugging and unplugging is required, the operation speed is slow, and the "fast fuzzy search" function cannot be realized.

[0005] How to solve the above technical problems is the subject faced by the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide a fast and accurate positioning woodworking protractor structure and a positioning method thereof.

[0007] The present invention is achieved through the following measures: a woodworking protractor structure with rapid and precise positioning, comprising a backrest, a movable baffle arranged on the backrest, a guide rail located on one side of the backrest, a dial positioning seat connected to the bottom of the backrest, a dial fixedly connected to the bottom of the dial positioning seat, the dial fixedly connected to the guide rail, wherein a rapid positioning device is provided on the guide rail below the arc circumference of the dial, an arc positioning block is provided on one side of the arc circumference of the dial, and a plurality of rapid positioning slots are provided at equal intervals on the circumference of the arc positioning block.

[0008] As a further optimized solution of the structure of a woodworking protractor for rapid and precise positioning provided by the present invention, the rapid positioning device 1 comprises a cover body arranged on the guide rail, and a sliding button arranged on one side of the cover body;

[0009] The quick positioning device also includes a positioning block shaft 1 arranged between two deep groove ball bearings on the cover body, a swing positioning block 1 that rotates around the positioning block shaft 1, an elastic member 1 whose bottom is connected to the guide rail below the swing positioning block 1, the top of the elastic member 1 is pressed against the swing positioning block 1, and a driving end of the swing positioning block 1 is provided with a positioning pin that cooperates with the quick positioning slot 1.

[0010] As a further optimization scheme for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the cross-sectional shape of the sliding button is a trapezoid, and a protruding pin is provided on one side of the sliding button, and the pin can be inserted into a radial matching hole at one end of the positioning block shaft one, and the sliding button is pressed in the sliding groove by elastic member two; one end of the positioning block shaft one is pre-tightened by a screw.

[0011] As a further optimization scheme for the structure of a woodworking protractor with rapid and precise positioning provided by the present invention, the second elastic member is composed of a compression spring connected to the inner side of the sliding button and a limit pin connected to the spring, and the limit pin cooperates with the sliding groove.

[0012] As a further optimization scheme for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the elastic member 1 is a compression spring whose bottom is connected to the guide rail below the swing positioning block 1, and the top of the compression spring is pressed against the swing positioning block 1.

[0013] The continuous elastic force of the elastic member 1 enables the swing positioning block 1 to always maintain the force and movement tendency of swinging upward, so that the positioning pin is continuously inserted into the quick positioning slot 1 of the dial 1. The quick positioning function of the protractor is realized through the structural design of the trapezoidal cross-section of the quick positioning slot 1 and the elastic force of the elastic member 1.

[0014] The positioning slot 1 is arranged obliquely below the scale plate 1, and the two side walls of the positioning slot 1 are inclined surfaces to facilitate the automatic alignment and sliding in of the positioning pin.

[0015] When the inner side wall of the positioning slot 1 is fully engaged with the ball head of the positioning pin, a precise positioning function is achieved, but the two are not self-locking. Under the action of a large lateral external force, the ball head of the positioning pin can slide out along the side wall of the positioning slot 1, so that the scale plate 1 can be quickly and easily turned to another desired working angle for positioning.

[0016] The swing of the positioning pin is achieved by rotating the positioning block with the positioning block shaft around the center of the base hole on the angle fixing seat; when the positioning block is swung downward to the lowest position, the positioning pin is completely pulled out of the quick positioning slot, and the sliding button can be pushed to lock the positioning block shaft, and the quick positioning function of the protractor is released.

[0017] The two ends of the positioning block shaft on the swing positioning block are respectively fixed to two deep groove ball bearings, and the other end of the positioning block shaft is pre-tightened by screws to eliminate the clearance of the deep groove ball bearing, thereby improving the axial and radial positioning accuracy of the swing positioning block.

[0018] The number of the quick positioning slots is 3-11, and they are arranged at corresponding positions below the dial according to the quick positioning requirements of the common working angles of the dial.

[0019] The swing positioning block rotates around the center of the base hole on the cover body with its own positioning block rotation axis.

[0020] The swing positioning block realizes its upward swinging movement through the elastic member.

[0021] The head of the positioning pin is in the shape of a sphere, a cone or an arc.

[0022] The sliding button is installed and pre-tightened in the sliding groove on the cover body through the second elastic member.

[0023] In order to better achieve the above-mentioned invention objectives, the present invention also provides a woodworking protractor structure with fast and accurate positioning, including a backrest, a movable baffle arranged on the backrest, a guide rail located on one side of the backrest, a dial positioning seat connected to the bottom of the backrest, a dial 2 fixedly connected to the bottom of the dial positioning seat, and the dial 2 is fixedly connected to the guide rail. It is characterized in that a fast positioning device 2 is provided on the guide rail below the arc circumference of the dial 2, a plurality of fast positioning blocks are evenly spaced on the side surface of the arc circumference of the dial 2, and a fast positioning rib is provided circumferentially on the fast positioning block.

[0024] As a further optimized solution of the structure of a woodworking protractor for rapid and precise positioning provided by the present invention, the second rapid positioning device comprises a housing arranged on the guide rail, and a rapid positioning knob arranged on one side of the housing;

[0025] The second quick positioning device also includes a second positioning block shaft hinged on the shell, a second swing positioning block rotating around the second positioning block shaft, and a slot is provided in the circumference of the rotating part of the second swing positioning block, and the slot is meshed with an elastic wave ball arranged on the shell.

[0026] As a further optimization scheme for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the elastic wave ball is a telescopic spring arranged in a direction perpendicular to the axis of the second rotating shaft of the positioning block, and is composed of a limiting wave ball connected to the free end of the telescopic spring, and the limiting wave ball cooperates with the slot.

[0027] In order to better achieve the above-mentioned invention object, the present invention also provides a positioning method for a woodworking protractor structure for rapid and accurate positioning, which specifically comprises the following steps:

[0028] Step S1: through the elastic force of the elastic member 1, the swing positioning block 1 is caused to swing upward around the positioning block rotation axis 1, so that the positioning pin is always in contact with the lower surface of the arc positioning block;

[0029] Step S2: Rotate the dial 1 until it reaches the working angle required for positioning. The positioning pin automatically slides into the quick positioning slot 1 under the action of the elastic member 1, and the two side inclined surfaces of the quick positioning slot 1 contact the spherical surface of the positioning pin. The positioning pin is inserted into the positioning slot 1 under the elastic force of the elastic member 1, thereby achieving quick and accurate positioning.

[0030] Step S3: When the user does not use the quick positioning function, press the upper end plane of the swing positioning block 1 to make the swing positioning block 1 swing to its lowest position, and pull out the positioning pin from the quick positioning slot 1, and then push the sliding button to the right to let the pin on its right side slide into a radial positioning hole of the positioning block shaft 1, thereby locking the swing positioning block 1 to prevent it from swinging upward.

[0031] In order to better achieve the above-mentioned invention object, the present invention also provides a positioning method for a woodworking protractor structure for rapid and accurate positioning, which specifically comprises the following steps:

[0032] Step S1: The swing positioning block 2 is swung upward around the positioning block rotating shaft 2 by means of the quick positioning knob, the elastic wave ball is inserted into the card slot of the swing positioning block 2, and the scale plate 2 is rotated until it is rotated to the required positioning angle, so that the right side of the swing positioning block 2 contacts the quick positioning retaining edge on the quick positioning block to achieve quick positioning;

[0033] Step S2: When the quick positioning is not used, the quick positioning knob is rotated, and the elastic wave ball is inserted into the slot of the swing positioning block 2, so that the swing positioning block 2 is prevented from swinging upward.

[0034] The beneficial effects of the present invention are as follows: the present invention uses an elastic member to swing the positioning pin fixed at the front end of the swing positioning block and snap into the positioning slot below the dial. The two side walls of the positioning slot are inclined surfaces and present a V-shaped structure. The positioning pin is circular. When the positioning pin slides to the edge of the positioning slot, it can be quickly snapped into the positioning slot and contact with any position point of the two side walls of the slot. The positioning speed is fast and the positioning accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of an existing woodworking protractor;

[0036] Figure 2 It is a positioning principle diagram of the woodworking protractor of the present invention;

[0037] Figure 3 It is a structural schematic diagram of a fast and accurate positioning woodworking protractor structure and a positioning method thereof of the present invention;

[0038] Figure 4 yes Figure 3 Rear view;

[0039] Figure 5 yes Figure 3 Left view;

[0040] Figure 6 It is a cross-sectional view along the CC direction;

[0041] Figure 7 yes Figure 5 Middle AA section view;

[0042] Figure 8 yes Figure 5 Middle BB section view;

[0043] Fig. 9 is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0044] Fig.10 yes Fig. 9 Rear view of

[0045] Fig.11 yes Fig. 9 Left view of

[0046] Fig.12 yes Fig. 9 Section along DD direction;

[0047] Fig.13 yes Fig.12 Schematic diagram of a partial enlargement of region I.

[0048] The reference numerals are: 101, quick positioning slot; 102, dial; 103, handle; 104, latch; 105, fixed seat; 1, backrest; 2, movable baffle; 3, guide rail; 4, dial positioning seat; 201, dial 1; 202, quick positioning device 1; 203, arc positioning block; 204, quick positioning slot 1; 5, cover; 205, sliding button; 206, positioning block shaft 1; 207, positioning pin ; 208, swing positioning block one; 209, elastic member one; 210, elastic member two; 211, sliding groove; 213, screw; 212, deep groove ball bearing; 301, dial two; 302, quick positioning device two; 303, quick positioning block; 304, quick positioning rib; 305, quick positioning knob; 306, swing positioning block two; 307, elastic wave ball; 308, positioning block shaft two; 309, slot; 6, housing. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0050] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances. Example

[0053] See also Figures 2 to 8 The present invention provides a technical solution of a fast and accurate positioning woodworking protractor structure, comprising a backrest 1, a movable baffle 2 arranged on the backrest 1, a guide rail 3 located on one side of the backrest 1, a dial positioning seat 4 connected to the bottom of the backrest 1, a dial 201 fixedly connected to the bottom of the dial positioning seat 4, and the dial 201 is fixedly connected to the guide rail 3, wherein a fast positioning device 202 is provided on the guide rail 3 below the arc circumference of the dial 201, an arc positioning block 203 is provided on the side surface of the arc circumference of the dial 201, and a plurality of fast positioning slots 204 are opened at equal intervals on the circumference of the arc positioning block 203.

[0054] As a further optimized solution of the structure of a woodworking protractor for rapid and accurate positioning provided by the present invention, a rapid positioning device 202 includes a cover body 5 arranged on a guide rail 3, and a sliding button 205 arranged on one side of the cover body 5;

[0055] The quick positioning device 202 also includes a positioning block shaft 206 arranged between two deep groove ball bearings 212 on the cover body 5, a swing positioning block 208 that rotates around the positioning block shaft 206, an elastic member 209 whose bottom is connected to the guide rail 3 below the swing positioning block 208, and the top of the elastic member 209 is pressed on the swing positioning block 208. The driving end of the swing positioning block 208 is provided with a positioning pin 207 that cooperates with the quick positioning slot 204.

[0056] As a further optimization scheme for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the cross-sectional shape of the sliding button 205 is a trapezoid, and a protruding pin is provided on one side of the sliding button 205, which can be inserted into the radial matching hole at one end of the positioning block shaft 206, and the sliding button 205 is pressed in the sliding groove 211 by the elastic member 210; one end of the positioning block shaft 206 is pre-tightened by a screw 213.

[0057] As a further optimized solution of the structure of a woodworking protractor for rapid and precise positioning provided by the present invention, the second elastic member 210 is composed of a compression spring connected to the inner side of the sliding button 205 and a limit pin connected to the spring, and the limit pin cooperates with the sliding slot 211.

[0058] As a further optimized solution for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the elastic member 209 is a compression spring whose bottom is connected to the guide rail 3 below the swing positioning block 208, and the top of the compression spring is pressed on the swing positioning block 208.

[0059] The continuous elastic force of the elastic member 209 enables the swing positioning block 208 to always maintain the force and movement tendency of the upward swing, so that the positioning pin 207 is continuously inserted into the quick positioning slot 204 of the dial 201. The quick positioning function of the protractor is realized through the structural design of the trapezoidal cross-section of the quick positioning slot 204 and the elastic force of the elastic member 209.

[0060] The positioning slot 204 is disposed obliquely below the scale plate 201 , and the two side walls of the positioning slot 204 are inclined surfaces to facilitate the automatic alignment and sliding of the positioning pin 207 .

[0061] When the inner side wall of the positioning slot 204 and the ball head of the positioning pin 207 are fully engaged, the precise positioning function is achieved, but the two are not self-locking. Under the action of a large lateral external force, the ball head of the positioning pin 207 can slide out along the side wall of the positioning slot 204, so that the dial 201 can be quickly and easily turned to another desired working angle for positioning.

[0062] The swinging of the positioning pin 207 is achieved by the swinging positioning block 208 rotating the positioning block shaft 206 around the center of the base hole on the angle fixing seat; when the swinging positioning block 208 swings downward to the lowest position, the positioning pin 207 is completely pulled out of the quick positioning slot 204. At this time, the sliding button 205 can be pushed to lock the positioning block shaft 206, and the quick positioning function of the protractor is released.

[0063] By fixing both ends of the positioning block shaft 206 on the swing positioning block 208 on two deep groove ball bearings 212 respectively, and pre-tightening the other end of the positioning block shaft 206 by screws 213 to eliminate the clearance of the deep groove ball bearing 212, the axial and radial positioning accuracy of the swing positioning block 208 is improved.

[0064] The number of the quick positioning slots 204 is 3-11, and they are arranged at corresponding positions below the dial 201 according to the quick positioning requirements of the common working angles of the dial.

[0065] The swing positioning block 208 rotates around the center of the base hole on the cover body 5 with its own positioning block rotation axis 206.

[0066] The swing positioning block 208 realizes its upward swinging movement through the elastic member 209.

[0067] The head of the positioning pin 207 is spherical, conical or arc-shaped.

[0068] The sliding button 205 is installed and pre-tightened in the sliding groove on the cover body 5 through the elastic member 210 .

[0069] In order to better achieve the above-mentioned invention object, the present invention also provides a positioning method for a woodworking protractor structure for rapid and accurate positioning, which specifically comprises the following steps:

[0070] Step S1: The elastic force of the elastic member 209 causes the swing positioning block 208 to swing upward around the positioning block rotation axis 206, so that the positioning pin 207 is always in contact with the lower surface of the arc positioning block 203;

[0071] Step S2: Rotate the scale plate 201 until it reaches the working angle required for positioning. The positioning pin 207 automatically slides into the quick positioning slot 204 under the action of the elastic member 209, and the inclined surfaces on both sides of the quick positioning slot 204 contact the spherical surface of the positioning pin 207. The positioning pin 207 is inserted into the positioning slot 204 under the elastic force of the elastic member 209, thereby achieving quick and accurate positioning.

[0072] Step S3: When the user does not use the quick positioning function, press the upper end plane of the swing positioning block 208 to swing the swing positioning block 208 to its lowest position, and pull the positioning pin 207 out of the quick positioning slot 204, and then push the sliding button 205 to the right to allow the pin on its right side to slide into a radial positioning hole of the positioning block shaft 206, thereby locking the swing positioning block 208 to prevent it from swinging upward. Example

[0073] See also Figures 9 to 13 A woodworking protractor structure with fast and accurate positioning includes a backrest 1, a movable baffle 2 arranged on the backrest 1, a guide rail 3 located on one side of the backrest 1, a dial positioning seat 4 connected to the bottom of the backrest 1, a dial 2 301 fixedly connected to the bottom of the dial positioning seat 4, and the dial 2 301 is fixedly connected to the guide rail 3. It is characterized in that a fast positioning device 2 302 is provided on the guide rail 3 below the arc circumference of the dial 2 301, and a plurality of fast positioning blocks 303 are evenly spaced on the side surface of the arc circumference of the dial 2 301, and a fast positioning retaining edge 304 is provided on the circumference of the fast positioning block 303.

[0074] As a further optimized solution of the structure of a woodworking protractor for rapid and precise positioning provided by the present invention, the second rapid positioning device 302 includes a housing 6 arranged on the guide rail 3, and a rapid positioning knob 305 arranged on one side of the housing 6;

[0075] The quick positioning device 302 also includes a positioning block shaft 308 hinged on the shell 6, a swing positioning block 306 rotating around the positioning block shaft 308, and a slot 309 is provided in the circumference of the rotating part of the swing positioning block 306, which is engaged with an elastic ball 307 arranged on the shell 6.

[0076] As a further optimization scheme for the structure of a woodworking protractor with fast and accurate positioning provided by the present invention, the elastic bead 307 is a telescopic spring arranged in a direction perpendicular to the axis of the positioning block rotating shaft 308, and is composed of a limiting bead connected to the free end of the telescopic spring, and the limiting bead cooperates with the slot 309.

[0077] In order to better achieve the above-mentioned invention object, the present invention also provides a positioning method for a woodworking protractor structure for rapid and accurate positioning, which specifically comprises the following steps:

[0078] Step S1: The second swing positioning block 306 is swung upward around the second positioning block shaft 308 by means of the quick positioning knob 305, the elastic wave ball 307 is inserted into the slot 309 of the second swing positioning block 306, and the second dial 301 is rotated until it is rotated to the required positioning angle, so that the right side of the second swing positioning block 306 contacts the quick positioning retaining edge 304 on the quick positioning block 303, so as to achieve quick positioning;

[0079] Step S2: When the quick positioning is not used, the quick positioning knob 305 is rotated, and the elastic bead 307 is inserted into the slot 309 of the second swing positioning block 306, so that the second swing positioning block 306 is prevented from swinging upward.

[0080] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning method using a woodworking protractor structure for rapid and accurate positioning, comprising a backer, a movable baffle disposed on the backer, a guide rail located on one side of the backer, a dial positioning seat connected to the bottom of the backer, a dial fixedly connected to the bottom of the dial positioning seat, and the dial fixedly connected to the guide rail, characterized in that: A quick positioning device is provided on the guide rail below the arc circumference of the scale plate, a plurality of quick positioning blocks are provided at equal intervals on the side surface of the arc circumference of the scale plate, and a quick positioning rib is provided in the circumferential direction of the quick positioning block; The quick positioning device comprises a housing arranged on the guide rail, and a quick positioning knob arranged on one side of the housing; The quick positioning device also includes a positioning block shaft hinged on the housing, a swing positioning block rotating around the positioning block shaft, a slot is provided in the circumference of the rotating portion of the swing positioning block, and the slot is meshed with an elastic wave ball provided on the housing; The elastic bead is a telescopic spring arranged in a direction perpendicular to the axis of the rotation shaft of the positioning block, and is connected to a limiting bead at the free end of the telescopic spring, and the limiting bead cooperates with the clamping slot; The positioning method of the woodworking protractor structure for rapid and accurate positioning comprises the following steps: Step S1: The swing positioning block is swung upward around the rotation axis of the positioning block by means of the quick positioning knob, the elastic wave ball is inserted into the card slot of the swing positioning block, and the dial is rotated until it is rotated to the required positioning angle, so that the right side of the swing positioning block contacts the quick positioning retaining edge on the quick positioning block to achieve quick positioning; Step S2: When the quick positioning is not used, the quick positioning knob is rotated, and the elastic wave ball is inserted into the slot of the swing positioning block, so that the swing positioning block prevents it from swinging upward.

Images