Synchronous backrest locking device and locking method for woodworking

Abstract

The present invention belongs to the field of fine woodworking manufacturing technology, and specifically relates to a synchronous backrest locking device and locking method for woodworking, the backrest locking device comprises a backrest body, a first locking mechanism, a pull rod, and a second locking mechanism. The first locking mechanism can lock one end of the backrest body with the table plate, one end of the pull rod is connected to the first locking mechanism, and the other end is connected to the second locking mechanism; the second locking mechanism can lock the other end of the backrest body with the table plate; the locking device has two working conditions, working condition one, the first locking mechanism and the second locking mechanism are both locked, the first locking block is pressed on the front guide rail, and the second locking block is pressed on the rear guide rail to realize the limitation of the relative position between the backrest body and the table plate; working condition two, the first locking mechanism and the second locking mechanism are both relaxed, there is a gap between the first locking block and the front guide rail, and there is a gap between the second locking block and the rear guide rail, and the relative position between the backrest body and the table plate can be adjusted by moving the backrest body.

Description

Technical Field

[0001] The invention belongs to the technical field of fine woodworking manufacturing, and particularly relates to a synchronous backing locking device and a locking method for woodworking. Background Art

[0002] At present, the existing woodworking backing device has the following defects:

[0003] Defect one, there are two locking methods for the existing backrest: the first is that one end is connected to the table, and the other end is in a relaxed state. When locking, the backrest will swing, resulting in a change in the parallelism of the backrest and the saw blade before and after locking, which can be up to 0.3mm or more. And because the other end is not fixed, the backrest will offset during the cutting process, causing errors again. The second is to lock both ends separately. When locking, the backrest will also swing, resulting in a change in the parallelism of the backrest and the saw blade before and after locking, which can be up to 0.3mm or more. Since the parallelism of the backrest and the saw blade changes when locking, inaccurate cutting dimensions will occur when cutting wood. Both of the above locking methods will cause the operator to not be able to cut into place in one go when cutting wood, but to reserve a distance of at least 2cm, and to repeatedly cut to obtain the required size of the wood board, which is more cumbersome to operate;

[0004] The second defect is that a large locking force is not obtained. Most existing backrest locking methods use eccentric wheels for locking, which wear out quickly. After wear, the locking force becomes smaller and cannot be adjusted. After long-term use, it may even fail. Summary of the Invention

[0005] The present invention provides a synchronous backing locking device and a locking method for woodworking, and solves the defects pointed out in the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a synchronous backrest locking device and locking method for woodworking, the locking device is arranged horizontally above the tabletop along the width direction of the tabletop, a front guide rail is provided on the feeding side of the tabletop, a front slider is installed on the front guide rail, and a rear guide rail is provided on the discharging side of the tabletop, and a rear slider is installed on the rear guide rail. The locking device includes a backrest body arranged along the width direction of the tabletop, a first locking mechanism arranged at one end of the backrest body, a pull rod and a second locking mechanism arranged at the other end of the backrest body, wherein:

[0007] The first locking mechanism can lock one end of the backrest body to the front guide rail, and the first locking mechanism includes a first locking bracket, the first locking bracket is mounted on the front slider, and a first locking swing arm is mounted on the side of the first locking bracket facing the external environment, the first locking swing arm is connected to the first locking bracket via a first locking swing arm rotating shaft, and the first locking swing arm can rotate along with the first locking swing arm rotating shaft;

[0008] A locking handle is provided on the side of the top of the first locking swing arm facing the backrest body, and an eccentric rotating shaft of the locking handle is provided on the end of the locking handle close to the first locking swing arm. Both ends of the eccentric rotating shaft of the locking handle are connected to the first locking bracket. A bearing is installed in the middle of the eccentric rotating shaft of the locking handle. The bearing rotates with the eccentric rotating shaft of the locking handle and is always in contact with the side of the top of the first locking swing arm facing the backrest body.

[0009] An adjusting pin is installed at the bottom end of the first locking swing arm, and a first locking block is provided at the end of the adjusting pin facing the front guide rail;

[0010] One end of the pull rod is connected to the first locking swing arm, and the other end is connected to the second locking mechanism;

[0011] The second locking mechanism can lock the other end of the backrest body with the rear guide rail, and the second locking mechanism includes a second locking bracket, which is sleeved on the pull rod, and a second locking swing arm is installed on the side of the second locking bracket facing the external environment. The second locking swing arm is connected to the second locking bracket through a second locking swing arm rotating shaft, and the second locking swing arm can rotate along with the second locking swing arm rotating shaft;

[0012] The pull rod passes through the second locking bracket and the second locking swing arm. A return spring, a bushing, and a first joint bearing are sequentially arranged between the second locking bracket and the second locking swing arm along the axial direction of the pull rod, from the first locking mechanism to the second locking mechanism. One end of the return spring rests on the second locking bracket, and the other end is connected to the bushing. The first joint bearing is in the second locking swing arm, and the first joint bearing cooperates with the locking member to connect the end of the pull rod away from the first locking mechanism to the second locking swing arm.

[0013] A second locking block is provided below a side of the second locking swing arm facing the second locking bracket;

[0014] The locking device has two working conditions, the first working condition is a locked state, and the second working condition is a released state;

[0015] In working condition 1, the locking handle is operated to drive the pull rod to move away from the second locking mechanism, so that the first locking block is pressed against the front guide rail, and the second locking block is pressed against the rear guide rail, so that the first locking mechanism and the second locking mechanism are locked synchronously, realizing the limitation of the relative position between the backrest body and the table plate;

[0016] When in working condition two, the locking handle is operated to reset, and the reset spring resets the pull rod in the direction away from the first locking mechanism, so that the first locking mechanism and the second locking mechanism are released synchronously. There is a gap between the first locking block and the front guide rail, and there is a gap between the second locking block and the rear guide rail. The backrest body is pushed so that the front slider and the rear slider both slide, thereby adjusting the relative position between the backrest body and the table plate.

[0017] As a further preferred embodiment of the present invention, the top of the first locking swing arm has three sections facing the backrest body, namely a plane section, an arc section, and an inclined section, and the bearing is always in contact with the plane section; the arc section is recessed into the first locking swing arm and does not contact the locking handle, thereby avoiding friction between the locking handle and the first locking swing arm during rotation; and the inclined section is formed by obliquely extending from the side of the arc section away from the plane section.

[0018] As a further preferred embodiment of the present invention, a protrusion is provided on one end of the locking handle close to the first locking bracket; when in the working condition one locking state, the protrusion on the locking handle is adjacent to the inclined surface section but does not contact the inclined surface section.

[0019] As a further preference of the present invention, it also includes a release limit block, which is installed inside one end of the backrest body facing the first locking swing arm. The release limit block is recessed inwardly toward one side of the first locking swing arm to form a groove structure. When in the relaxed state of working condition two, the protrusion on the locking handle contacts the groove structure.

[0020] As a further preference of the present invention, it also includes a locking limit seat and a locking limit block, the locking limit seat is installed above the release limit block, and the locking limit seat is above the first locking bracket; the middle part of the locking limit seat is hollow, and the locking handle moves in the middle of the locking limit seat; the connection between the locking limit seat and the release limit block is an inclined surface facing the locking handle; the locking limit block is installed on the inclined surface, and the end face of the locking limit block faces the locking handle; when in the working condition one locking state, the locking handle contacts the end face of the locking limit block.

[0021] As a further preferred embodiment of the present invention, the invention further includes a pull rod fixing nut, a second set screw, a second joint bearing, and a limit pin, wherein:

[0022] A pull rod fixing nut and a second set screw are provided at one end of the pull rod facing the first locking mechanism;

[0023] The second joint bearing is sleeved on the pull rod, and the limit pin is arranged on a side of the second joint bearing away from the pull rod fixing nut;

[0024] The limiting pin and the pull rod fixing nut clamp the second joint bearing in the middle to limit the pull rod.

[0025] As a further preferred embodiment of the present invention, the locking member adopts a first locking screw and a rear locking adjusting nut, and the first locking screw and the rear locking adjusting nut are installed at the end of the pull rod away from the first locking mechanism.

[0026] As a further preference of the present invention, it also includes a first locking bracket fixing block and a second locking bracket fixing block. The backrest body is an aluminum profile structure. The first locking bracket fixing block is installed on the first locking bracket, and the first locking bracket fixing block can be inserted into the T-slot of the aluminum profile structure; the second locking bracket fixing blocks that can move in the T-slot of the aluminum profile structure are arranged on both sides of the bottom of the second locking bracket.

[0027] A locking method using a high-precision backing locking device for woodworking is also provided. The locking method has two working conditions: the first working condition is a locked state, and the second working condition is a loose state. The specific locking steps are as follows:

[0028] When the relative position between the backrest body and the table plate needs to be limited, the locking device needs to be in working condition 1, the first locking mechanism and the second locking mechanism need to be locked, and the locking device needs to be switched from the loose state to the locked state;

[0029] The locking handle is operated to rotate toward the first locking swing arm, and the eccentric shaft of the locking handle rotates accordingly, and the bearing presses the first locking swing arm toward the external environment, so that the first locking swing arm rotates toward the external environment along with the shaft of the first locking swing arm, driving the adjusting pin to move toward the front guide rail, so that the first locking block is pressed against the front guide rail;

[0030] When the first locking swing arm rotates along with the first locking swing arm rotating shaft toward the external environment, the first locking swing arm pulls the pull rod to move in the direction away from the second locking mechanism, driving the second locking swing arm to rotate toward the second locking bracket with the second locking swing arm rotating shaft as the central axis. The return spring is squeezed, and when the first locking block is pressed against the front guide rail, the second locking block is pressed against the rear guide rail;

[0031] The first locking block is pressed against the front guide rail and the second locking block is pressed against the rear guide rail, thereby locking the first locking mechanism and the second locking mechanism, thereby limiting the relative position between the backrest body and the table plate;

[0032] When the relative position between the backrest body and the table plate needs to be adjusted, the locking device needs to be in working condition 2, the first locking mechanism and the second locking mechanism need to be released, and the locking device needs to be switched from the locked state to the released state;

[0033] The locking handle is operated and rotated toward the backrest body, and the eccentric shaft of the locking handle rotates accordingly. The bearing rotates accordingly and no longer presses the first locking swing arm toward the external environment. The return spring is reset, pushing the second locking swing arm to rotate away from the second locking bracket, and a gap is generated between the second locking block and the rear guide rail;

[0034] The reset spring resets and pushes the second locking swing arm to rotate away from the second locking bracket. At the same time, the pull rod is driven by the second locking swing arm to move away from the first locking mechanism. The first locking swing arm is pulled by the pull rod to rotate toward the backer body, and a gap is generated between the first locking block and the front guide rail.

[0035] A gap is created between the second locking block and the rear guide rail, and a gap is created between the first locking block and the front guide rail, so that the first locking mechanism and the second locking mechanism are relaxed. The front slider can move arbitrarily on the front guide rail, and the rear slider can move arbitrarily on the rear guide rail, pushing the backrest body so that both the front slider and the rear slider slide, thereby adjusting the relative position between the backrest body and the table top.

[0036] Through the above technical solution, compared with the existing technology, the present invention has the following beneficial effects:

[0037] 1. The present invention can realize synchronous position limitation between the two ends of the backrest body and the table plate through the cooperation of the locking handle, the first locking mechanism, the pull rod and the second locking mechanism, ensuring that the parallelism variation between the backrest and the saw blade is less than 0.03mm before and after locking, and the two ends of the backrest body can be locked and released by operating only one locking handle, which is convenient to operate.

[0038] 2. The present invention reduces the friction coefficient during operation by adding a bearing to the handle, thereby increasing the effective locking force under the same operating force. In addition, rolling friction greatly reduces the wear rate of the mechanism and increases its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below with reference to the accompanying drawings and examples.

[0040] Figure 1 Schematic diagram of the installation position of the present invention;

[0041] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0042] Figure 3 This is a schematic diagram of the internal structure of the first locking mechanism of the present invention when it is in a locked state;

[0043] Figure 4 This is a schematic diagram of the internal structure of the second locking mechanism of the present invention when it is in a locked state;

[0044] Figure 5 This is a schematic diagram of the internal structure of the first locking mechanism of the present invention when it is in a released state;

[0045] Figure 6 This is a schematic diagram of the internal structure of the second locking mechanism of the present invention when it is in a released state;

[0046] Figure 7This is a schematic diagram of the overall structure of the eccentric shaft of the locking handle of the present invention;

[0047] Figure 8 It is a cross-sectional structural diagram of the locking handle mounting portion and the eccentric rotating shaft of the locking handle of the present invention;

[0048] Figure 9 It is a schematic diagram of the overall structure of the locking handle of the present invention;

[0049] Figure 10 It is a schematic diagram of the overall structure of the first locking swing arm of the present invention;

[0050] Figure 11 is a schematic diagram of the overall structure of the second locking bracket of the present invention;

[0051] Figure 12 It is a schematic diagram of the overall structure of the second locking swing arm of the present invention;

[0052] Figure 13 It is a schematic diagram of the overall structure of the locking limit seat of the present invention;

[0053] Figure 14 This is a cross-sectional structural diagram of the locking limit seat of the present invention;

[0054] Figure 15 It is a schematic diagram of the overall structure of the first locking mechanism of the present invention;

[0055] Figure 16 It is a schematic diagram of the overall structure of the second locking mechanism of the present invention;

[0056] Figure 17 It is a schematic diagram of the overall structure of the first locking bracket of the present invention.

[0057] In the figure: 1. first locking swing arm; 2. locking limit seat; 3. eccentric shaft of locking handle; 4. bearing; 5. locking limit block; 6. release limit block; 7. locking handle; 8. backrest body; 9. pull rod; 10. first joint bearing; 11. limit pin; 12. pull rod fixing nut; 13. second fastening screw; 14. first locking swing arm shaft; 15. first locking block mounting seat; 16. adjusting pin; 17. first locking block; 18. return spring; 19. second locking bracket; 20. second locking swing arm shaft; 21. bushing; 22. first locking screw; 23. rear locking adjusting nut; 24. second locking swing arm; 25; second Locking block; 26. Rear slider; 27. Rear guide rail; 28. Front guide rail; 29. ​​Front slider; 30. First locking bracket; 31. Second joint bearing; 32. Protrusion; 33. Mounting portion; 34. Crescent-shaped grip; 35. Plane section; 36. Arc section; 37. Inclined section; 38. First mounting plate; 39. First mounting block; 40. Second mounting block; 41. Groove structure; 42. Inclined surface; 43. Second mounting plate; 44. Third mounting plate; 45. Fourth mounting plate; 46. First locking bracket fixing block; 47. Cover; 48. Second locking bracket fixing block; 49. End cover; 55. Table; 56. Pin; 57. Sliding bearing. DETAILED DESCRIPTION

[0058] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0059] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of components and therefore should not be construed as limitations on the present invention. The specific dimensions used in this embodiment are intended only to illustrate the technical solution and do not limit the scope of protection of the present invention.

[0060] Example 1

[0061] This embodiment provides a preferred embodiment, a synchronous backing locking device for woodworking, such as Figures 1 to 17 As shown, the locking device includes a backrest body 8 arranged along the width direction of the platform 55, a first locking mechanism arranged at one end of the backrest body 8, a pull rod 9 and a second locking mechanism arranged at the other end of the backrest body 8.

[0062] like Figure 1As shown, the feed side of the platen 55 is provided with a front guide rail 28, on which a front slider 29 is mounted, and the front slider 29 can move arbitrarily on the front guide rail 28. The discharge side of the platen 55 is provided with a rear guide rail 27, on which a rear slider 26 is mounted, and the rear slider 26 can move arbitrarily on the rear guide rail 27.

[0063] like Figure 3 As shown, the first locking mechanism can lock one end of the backrest body 8 to the front guide rail 28. The first locking mechanism includes a first locking bracket 30, which is mounted on the front slider 29. When the front slider 29 moves on the front guide rail 28, it drives the first locking mechanism to move. A first locking swing arm 1 is mounted on the side of the first locking bracket 30 facing the external environment. The first locking swing arm 1 is connected to the first locking bracket 30 via a first locking swing arm shaft 14, and the first locking swing arm 1 can rotate with the first locking swing arm shaft 14.

[0064] A locking handle 7 is provided on the top of the first locking swing arm 1 facing the side of the backrest body 8. Figure 9 As shown, one end of the locking handle 7 is a mounting portion 33, and the other end is a crescent-shaped grip 34; the mounting portion 33 has a circular cross-section, and the middle portion of the mounting portion 33 is a cavity. A locking handle eccentric shaft 3 is provided at one end of the locking handle 7 close to the first locking swing arm 1, that is, the locking handle eccentric shaft 3 is installed in the cavity. Both ends of the locking handle eccentric shaft 3 pass through the mounting portion 33 and are connected to the first locking bracket 30. A bearing 4 is installed in the middle of the locking handle eccentric shaft 3. The bearing 4 rotates with the rotation of the locking handle eccentric shaft 3, and the bearing 4 is always in contact with the side of the top of the first locking swing arm 1 facing the backrest body 8. A protrusion 32 is provided on the mounting portion 33. When in the working condition one locking state, the protrusion 32 on the locking handle 7 is adjacent to the inclined surface section 37 but does not contact the inclined surface section 37.

[0065] like Figure 7 and Figure 8 As shown, both ends of the locking handle's eccentric shaft 3 are connected to the first locking bracket 30 via sliding bearings 57. Two through-holes in the locking handle's eccentric shaft 3 are connected to the locking handle 7 via pins 56. The rotation axis of the bearing 4 coincides with the axis of the middle section of the locking handle's eccentric shaft 3. When the locking handle 7 rotates, the entire bearing 4 rotates about the axis of the sliding bearing 57 (i.e., the rotation axis of the end sections of the locking handle's eccentric shaft 3), and the inner and outer rings of the bearing 4 rotate relative to each other.

[0066] An adjusting pin 16 is mounted at the bottom end of the first locking swing arm 1. A first locking block mounting seat 15 is provided at the end of the adjusting pin 16 facing the front guide rail 28. A first locking block 17 is mounted on the first locking block mounting seat 15. The adjusting pin 16 can adjust the tightness of the first locking block 17 against the front guide rail 28.

[0067] Specifically, if Figure 10 As shown, the top of the first locking arm 1, facing the backrest body 8, has three sections: a flat section 35, an arcuate section 36, and an inclined section 37. The bearing 4 is always in contact with the flat section 35. The arcuate section 36 is recessed into the first locking arm 1 and out of contact with the locking handle 7, preventing friction between the locking handle 7 and the first locking arm 1 during rotation. An inclined section 37 extends obliquely from the side of the arcuate section 36 facing away from the flat section 35, and avoids the locking handle 7.

[0068] One end of the pull rod 9 is connected to the first locking swing arm 1, and the other end is connected to the second locking mechanism.

[0069] like Figure 4 As shown, the second locking mechanism can lock the other end of the backrest body 8 with the rear guide rail 27. The second locking mechanism includes a second locking bracket 19, which is sleeved on the pull rod 9. Figure 11 As shown, the second locking bracket 19 includes a first mounting plate 38, a first mounting block 39, and a second mounting block 40. The first mounting plate 38 is mounted on the pull rod 9 in the vertical direction, and the bottom of the first mounting plate 38 is connected to the rear slider 26. A first mounting block 39 is provided on the upper side of the first mounting plate 38 away from the first locking mechanism. Second mounting blocks 40 are provided on both sides of the bottom of the first mounting plate 38 along the length direction of the backrest body 8. The second mounting blocks 40 are used to install the second locking bracket fixing block 48, and the second locking bracket 19 is driven to move along the length direction of the backrest body 8 through the second locking bracket fixing block 48. The second locking swing arm 24 (as shown in FIG. 2 ) is installed at the first mounting block 39 through the second locking swing arm shaft 20. Figure 12 As shown in FIG, the second locking swing arm 24 can rotate along with the second locking swing arm rotating shaft 20. A second locking block 25 is provided below the second locking swing arm 24 on one side toward the second locking bracket 19.

[0070] The above-mentioned pull rod 9 passes through the second locking bracket 19 and the second locking swing arm 24. A reset spring 18, a bushing 21, and a first joint bearing 10 are sequentially arranged along the axial direction of the pull rod 9 between the second locking bracket 19 and the second locking swing arm 24, from the first locking mechanism to the second locking mechanism. One end of the reset spring 18 rests on the second locking bracket 19, and the other end is connected to the bushing 21. The first joint bearing 10 is located in the second locking swing arm 24, and the first joint bearing 10 cooperates with the locking member to connect the end of the pull rod 9 away from the first locking mechanism to the second locking swing arm 24. Preferably, the locking member adopts a first locking screw 22 and a rear locking adjustment nut 23, and the first locking screw 22 and the rear locking adjustment nut 23 are installed at the end of the pull rod 9 away from the first locking mechanism.

[0071] This locking device has two working conditions, working condition one is locked state, working condition two is released state;

[0072] In working condition 1, the locking handle 7 is operated to drive the pull rod 9 to move away from the second locking mechanism, so that the first locking block 17 is pressed against the front guide rail 28, and the second locking block 25 is pressed against the rear guide rail 27. Thus, the first locking mechanism and the second locking mechanism are locked synchronously, realizing the limitation of the relative position between the backrest body 8 and the platform 55.

[0073] When in working condition two, the locking handle 7 is operated to reset, and the reset spring 18 is reset to push the pull rod 9 in the direction away from the first locking mechanism, so that the first locking mechanism and the second locking mechanism are released synchronously. There is a gap between the first locking block 17 and the front guide rail 28, and there is a gap between the second locking block 25 and the rear guide rail 27. The backrest body 8 is pushed so that the front slider 29 and the rear slider 26 both slide, thereby adjusting the relative position between the backrest body 8 and the table plate 55.

[0074] This embodiment also includes a release limit block 6, which is installed inside the end of the backrest body 8 facing the first locking swing arm 1. The release limit block 6 is recessed inwardly toward one side of the first locking swing arm 1 to form a groove structure 41. When in the release state of working condition two, the protrusion 32 on the locking handle 7 contacts the groove structure 41.

[0075] like Figure 3 、 Figure 13 as well as Figure 14 As shown, this embodiment also includes a locking limit seat 2 and a locking limit block 5. The locking limit seat 2 is installed above the release limit block 6, and the locking limit seat 2 is above the first locking bracket 30; the middle part of the locking limit seat 2 is hollow, and the locking handle 7 moves in the middle part of the locking limit seat 2; the side of the connection between the locking limit seat 2 and the release limit block 6 facing the locking handle 7 is a slope 42; the locking limit block 5 is installed on the slope 42, and the end face of the locking limit block 5 faces the locking handle 7; when in the working condition one locking state, the locking handle 7 contacts the end face of the locking limit block 5.

[0076] This embodiment also includes a pull rod fixing nut 12, a second set screw 13, a second joint bearing 31, and a limit pin 11. A pull rod fixing nut 12 and a second set screw 13 are provided at one end of the pull rod 9 facing the first locking mechanism. The second joint bearing 31 is sleeved on the pull rod 9, and the limit pin 11 is provided on the side of the second joint bearing 31 facing away from the pull rod fixing nut 12. The limit pin 11 and the pull rod fixing nut 12 clamp the second joint bearing 31 in the middle to limit the pull rod 9 and prevent the pull rod 9 from rotating.

[0077] For aesthetics and dust prevention, this embodiment further includes a cover 47 and an end cover 49. The cover 47 is arranged outside the first locking mechanism, and the end cover 49 is installed outside the second locking mechanism.

[0078] In this embodiment, the backrest body 8 is constructed of an aluminum profile. By disposing second locking bracket fixing blocks 48 on both sides of the bottom of the second locking bracket 19, which can move within the T-slot of the aluminum profile, the relative position of the second locking bracket 19 on the pull rod 9 can be changed. A set screw is installed on the second locking bracket fixing block 48. When the set screw presses against the T-slot of the backrest body 8, the reaction force pushes the second locking bracket fixing block 48 toward the external environment, and the two longer sides of the second locking bracket fixing block 48 come into contact with the inside of the T-slot opening (the second locking bracket fixing block 48 is wider than the T-slot opening). Thus, the further the set screw pushes inward, the closer the second locking bracket fixing block 48 presses against the inside of the T-slot opening, thereby being compressed. The second locking bracket 19 is connected to the second locking bracket fixing block 48, and the second locking bracket 19 cooperates with the two second locking bracket fixing blocks 48 to clamp the T-slot opening, achieving double restraint.

[0079] like Figure 17 As shown, the first locking bracket 30 of this embodiment includes a second mounting plate 43, a third mounting plate 44, and a fourth mounting plate 45. The second mounting plate 43 is connected to the front slider 29; the third mounting plate 44 is mounted on the second mounting plate 43 and extends toward the backrest body 8; two opposed fourth mounting plates 45 are mounted vertically on the side of the third mounting plate 44 facing away from the backrest body 8. Two first locking bracket fixing blocks 46 are mounted on the third mounting plate 44. The two first locking bracket fixing blocks 46 can be inserted into the T-slots of the backrest body 8 (aluminum profile structure) and then fixed to the backrest body 8 via fasteners. The first locking swing arm 1 is mounted between the two fourth mounting plates 45.

[0080] This embodiment is applicable to the table 55 with a width of 685 to 800 mm. Figure 4 As shown, taking an 800mm wide tabletop 55 as an example, when adjusting, all components except the pull rod 9, first locking screw 22, rear locking adjustment nut 23, and the dashed line are moved leftward, and a sleeve is added between the first spherical bearing 10 and the rear locking adjustment nut 23. For example, when adjusting to a tabletop 55 width of 685mm, the adjustment is performed by moving the pull rod 9 leftward by 115mm and adding a sleeve 115mm long, with an inner diameter of 8mm and an outer diameter of 12mm between the first spherical bearing 10 and the rear locking adjustment nut 23. When the tabletop width is less than 800mm, adding a sleeve between the first spherical bearing 10 and the rear locking adjustment nut 23 ensures that the rear locking adjustment nut 23 remains in the same position on tabletops 55 of varying sizes. If the rear locking adjustment nut 23 moves with the pull rod 9, when installed on a tabletop 55 less than 800mm wide, it will move into the backrest body 8 along with the second locking bracket, making it impossible to adjust the tightness of the second locking mechanism.

[0081] This embodiment also provides a locking method for the locking device. The locking method has two working conditions: the first working condition is a locked state, and the second working condition is a released state. The specific locking and releasing steps are as follows:

[0082] When the relative position between the backrest body 8 and the platform 55 needs to be limited, the locking device needs to be in working condition 1, the first locking mechanism and the second locking mechanism need to be locked, and the locking device needs to be switched from the relaxed state to the locked state.

[0083] The locking handle 7 is operated to rotate toward the first locking swing arm 1, and the locking handle eccentric shaft 3 rotates accordingly, and the bearing 4 presses the first locking swing arm 1 toward the external environment. As a result, the first locking swing arm 1 rotates toward the external environment along with the first locking swing arm shaft 14, driving the adjusting pin 16 to move toward the front guide rail 28, so that the first locking block 17 is pressed against the front guide rail 28, thereby achieving locking between the first locking mechanism and the table 55. Since the front guide rail 28 and the table 55 are fixed, the locking between the first locking block 17 and the front guide rail 28 can achieve locking between the first locking mechanism and the table 55.

[0084] When the first locking swing arm 1 rotates toward the external environment along with the first locking swing arm shaft 14, the first locking swing arm 1 pulls the pull rod 9 to move in the direction away from the second locking mechanism, driving the second locking swing arm 24 to rotate toward the second locking bracket 19 with the second locking swing arm shaft 20 as the center axis. The reset spring 18 is squeezed, and when the first locking block 17 is pressed against the front guide rail 28, the second locking block 25 is pressed against the rear guide rail 27.

[0085] The first locking block 17 is pressed against the front guide rail 28 and the second locking block 25 is pressed against the rear guide rail 27 , thereby locking the first locking mechanism and the second locking mechanism, thereby limiting the relative position between the backrest body 8 and the platform 55 .

[0086] When the relative position between the backrest body 8 and the table 55 needs to be adjusted (i.e., when the position of the front slider 29 on the front guide rail 28 needs to be adjusted), the locking device needs to be in working condition 2, the first locking mechanism and the second locking mechanism need to be released, and the locking device needs to be switched from the locked state to the released state.

[0087] The locking handle 7 is operated to rotate toward the backrest body 8, and the eccentric shaft 3 of the locking handle rotates accordingly. The bearing 4 rotates accordingly and no longer presses the first locking swing arm 1 toward the external environment. The reset spring 18 is reset, pushing the second locking swing arm 24 to rotate away from the second locking bracket 19, and a gap is generated between the second locking block 25 and the rear guide rail 27.

[0088] When the reset spring 18 resets and pushes the second locking swing arm 24 to rotate away from the second locking bracket 19, the pull rod 9 is driven by the second locking swing arm 24 to move away from the first locking mechanism, and the first locking swing arm 1 is pulled by the pull rod 9 to rotate toward the backrest body 8, and a gap is generated between the first locking block 17 and the front guide rail 28.

[0089] A gap is created between the second locking block 25 and the rear guide rail 27, and a gap is created between the first locking block 17 and the front guide rail 28, thereby relaxing the first locking mechanism and the second locking mechanism. The front slider 29 can move arbitrarily on the front guide rail 28, and the rear slider 26 can move arbitrarily on the rear guide rail 27, pushing the backrest body 8 so that both the front slider 29 and the rear slider 26 slide, thereby adjusting the relative position between the backrest body 8 and the table plate 55.

[0090] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such, will not be interpreted in an idealized or overly formal sense.

[0091] The meaning of "and / or" in this application means that both situations where each exists alone or both exist at the same time are included.

[0092] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.

[0093] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A synchronous backrest locking device for woodworking, wherein the locking device is horizontally arranged above the tabletop (55) along the width direction of the tabletop (55), a front guide rail (28) is provided on the feeding side of the tabletop (55), a front slider (29) is installed on the front guide rail (28), and a rear guide rail (27) is provided on the discharging side of the tabletop (55), a rear slider (26) is installed on the rear guide rail (27), and the locking device is characterized in that: The locking device comprises a backrest body (8) arranged along the width direction of the platform (55), a first locking mechanism arranged at one end of the backrest body (8), a pull rod (9), and a second locking mechanism arranged at the other end of the backrest body (8), wherein: The first locking mechanism can lock one end of the backrest body (8) with the front guide rail (28), and the first locking mechanism includes a first locking bracket (30), the first locking bracket (30) is installed on the front slider (29), and a first locking swing arm (1) is installed on the side of the first locking bracket (30) facing the external environment. The first locking swing arm (1) is connected to the first locking bracket (30) through the first locking swing arm rotating shaft (14), and the first locking swing arm (1) can rotate along with the first locking swing arm rotating shaft (14); A locking handle (7) is provided on the side of the top of the first locking swing arm (1) facing the backrest body (8), and a locking handle eccentric rotating shaft (3) is provided on the end of the locking handle (7) close to the first locking swing arm (1). Both ends of the locking handle eccentric rotating shaft (3) are connected to the first locking bracket (30), and a bearing (4) is installed in the middle of the locking handle eccentric rotating shaft (3). The bearing (4) rotates with the locking handle eccentric rotating shaft (3), and the bearing (4) is always in contact with the side of the top of the first locking swing arm (1) facing the backrest body (8); An adjusting pin (16) is installed at the bottom end of the first locking swing arm (1), and a first locking block (17) is provided at one end of the adjusting pin (16) facing the front guide rail (28); One end of the pull rod (9) is connected to the first locking swing arm (1), and the other end is connected to the second locking mechanism; The second locking mechanism can lock the other end of the backrest body (8) with the rear guide rail (27), and the second locking mechanism includes a second locking bracket (19), and the second locking bracket (19) is sleeved on the pull rod (9); a second locking swing arm (24) is installed on the side of the second locking bracket (19) facing the external environment, and the second locking swing arm (24) is connected to the second locking bracket (19) through a second locking swing arm rotating shaft (20), and the second locking swing arm (24) can rotate along with the second locking swing arm rotating shaft (20); The pull rod (9) passes through the second locking bracket (19) and the second locking swing arm (24), and a return spring (18), a bushing (21), and a first joint bearing (10) are sequentially arranged along the axial direction of the pull rod (9) between the second locking bracket (19) and the second locking swing arm (24) from the first locking mechanism to the second locking mechanism. One end of the return spring (18) rests on the second locking bracket (19), and the other end is connected to the bushing (21). The first joint bearing (10) is in the second locking swing arm (24), and the first joint bearing (10) cooperates with the locking member to connect the end of the pull rod (9) away from the first locking mechanism to the second locking swing arm (24); A second locking block (25) is provided below the second locking swing arm (24) on one side facing the second locking bracket (19); The locking device has two working conditions, the first working condition is a locked state, and the second working condition is a released state; When in working condition 1, the locking handle (7) is operated to drive the pull rod (9) to move away from the second locking mechanism, so that the first locking block (17) is pressed against the front guide rail (28), and the second locking block (25) is pressed against the rear guide rail (27), so that the first locking mechanism and the second locking mechanism are locked synchronously, realizing the limitation of the relative position between the backrest body (8) and the table plate (55); When in working condition 2, the locking handle (7) is operated to reset, and the reset spring (18) resets to push the pull rod (9) in the direction away from the first locking mechanism, so that the first locking mechanism and the second locking mechanism are released synchronously, and there is a gap between the first locking block (17) and the front guide rail (28), and there is a gap between the second locking block (25) and the rear guide rail (27), pushing the backrest body (8) so that the front slider (29) and the rear slider (26) both slide, thereby adjusting the relative position between the backrest body (8) and the table plate (55).

2. A synchronous backing locking device for woodworking according to claim 1, characterized in that: The top of the first locking swing arm (1) facing the backrest body (8) has three sections, namely a plane section (35), an arc section (36), and an inclined section (37). The bearing (4) is always in contact with the plane section (35); the arc section (36) is recessed into the first locking swing arm (1) and does not contact the locking handle (7), thereby avoiding friction between the locking handle (7) and the first locking swing arm (1) during rotation; and the inclined section (37) is obliquely extended from the side of the arc section (36) away from the plane section (35).

3. A synchronous backing locking device for woodworking according to claim 2, characterized in that: A protrusion (32) is provided at one end of the locking handle (7) close to the first locking bracket (30); when in the first locking state, the protrusion (32) on the locking handle (7) is adjacent to the inclined surface section (37) but does not contact the inclined surface section (37).

4. A synchronous backrest locking device for woodworking according to claim 3, characterized in that: The invention also includes a loosening limit block (6), which is installed inside one end of the backrest body (8) facing the first locking swing arm (1). The loosening limit block (6) is recessed inwardly on one side facing the first locking swing arm (1) to form a groove structure (41). When in the loose state of the second working condition, the protrusion (32) on the locking handle (7) contacts the groove structure (41).

5. A synchronous backing locking device for woodworking according to claim 4, characterized in that: The invention also comprises a locking limit seat (2) and a locking limit block (5), wherein the locking limit seat (2) is mounted above the release limit block (6), and the locking limit seat (2) is located above the first locking bracket (30); the locking limit seat (2) is hollow in the middle, and the locking handle (7) moves in the middle of the locking limit seat (2); the side of the connection between the locking limit seat (2) and the release limit block (6) facing the locking handle (7) is an inclined surface (42); the locking limit block (5) is mounted on the inclined surface (42), and the end face of the locking limit block (5) faces the locking handle (7); when in the first working condition, the locking state, the locking handle (7) contacts the end face of the locking limit block (5).

6. A synchronous backing locking device for woodworking according to claim 5, characterized in that: It also includes a pull rod fixing nut (12), a second set screw (13), a second joint bearing (31), and a limit pin (11), wherein: A pull rod fixing nut (12) and a second set screw (13) are provided at one end of the pull rod (9) facing the first locking mechanism; The second joint bearing (31) is sleeved on the pull rod (9), and the limit pin (11) is arranged on a side of the second joint bearing (31) away from the pull rod fixing nut (12); The limiting pin (11) and the pull rod fixing nut (12) clamp the second joint bearing (31) in the middle to limit the pull rod (9).

7. The synchronous backing locking device for woodworking according to claim 5, characterized in that: The locking member adopts a first locking screw (22) and a rear locking adjustment nut (23), and the first locking screw (22) and the rear locking adjustment nut (23) are installed at one end of the pull rod (9) away from the first locking mechanism.

8. The synchronous backing locking device for woodworking according to claim 5, characterized in that: It also includes a first locking bracket fixing block (46) and a second locking bracket fixing block (48), the backrest body (8) is an aluminum profile structure, the first locking bracket fixing block (46) is installed on the first locking bracket (30), and the first locking bracket fixing block (46) can be inserted into the T-slot of the aluminum profile structure; second locking bracket fixing blocks (48) that can move in the T-slot of the aluminum profile structure are arranged on both sides of the bottom of the second locking bracket (19).

9. The locking method of the high-precision backing locking device for woodworking according to any one of claims 5 to 8, characterized in that: The locking method has two working conditions, working condition one is locked state, working condition two is released state. The specific locking steps are as follows: When the relative position between the backrest body (8) and the table (55) needs to be limited, the locking device needs to be in working condition 1, the first locking mechanism and the second locking mechanism need to be locked, and the locking device needs to be switched from the loose state to the locked state; The locking handle (7) is operated to rotate toward the first locking swing arm (1), and the locking handle eccentric shaft (3) rotates accordingly, and the bearing (4) presses the first locking swing arm (1) toward the external environment, so that the first locking swing arm (1) rotates toward the external environment along with the first locking swing arm shaft (14), driving the adjusting pin (16) to move toward the front guide rail (28), so that the first locking block (17) is pressed against the front guide rail (28); When the first locking swing arm (1) rotates toward the external environment along with the first locking swing arm rotating shaft (14), the first locking swing arm (1) pulls the pull rod (9) to move in the direction away from the second locking mechanism, driving the second locking swing arm (24) to rotate toward the second locking bracket (19) with the second locking swing arm rotating shaft (20) as the central axis, and the return spring (18) is squeezed, and when the first locking block (17) is pressed against the front guide rail (28), the second locking block (25) is pressed against the rear guide rail (27); The first locking block (17) is pressed against the front guide rail (28) and the second locking block (25) is pressed against the rear guide rail (27), thereby locking the first locking mechanism and the second locking mechanism, thereby limiting the relative position between the backrest body (8) and the table plate (55); when the relative position between the backrest body (8) and the table plate (55) needs to be adjusted, the locking device needs to be in working condition 2, the first locking mechanism and the second locking mechanism need to be released, and the locking device needs to be switched from the locked state to the released state; The locking handle (7) is operated to rotate toward the backrest body (8), and the locking handle eccentric shaft (3) rotates accordingly, and the bearing (4) rotates accordingly and no longer presses the first locking swing arm (1) toward the external environment, and the reset spring (18) resets, pushing the second locking swing arm (24) to rotate away from the second locking bracket (19), and a gap is generated between the second locking block (25) and the rear guide rail (27); When the reset spring (18) resets and pushes the second locking swing arm (24) to rotate in a direction away from the second locking bracket (19), the pull rod (9) is driven by the second locking swing arm (24) to move in a direction away from the first locking mechanism, and the first locking swing arm (1) is pulled by the pull rod (9) to rotate in the direction of the backrest body (8), and a gap is generated between the first locking block (17) and the front guide rail (28); A gap is generated between the second locking block (25) and the rear guide rail (27), and a gap is generated between the first locking block (17) and the front guide rail (28), so that the first locking mechanism and the second locking mechanism are relaxed. The front slider (29) can move arbitrarily on the front guide rail (28), and the rear slider (26) can move arbitrarily on the rear guide rail (27), pushing the backrest body (8) so that both the front slider (29) and the rear slider (26) slide, thereby adjusting the relative position between the backrest body (8) and the table (55).

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