Flexible adjusting structure for gear and rack transmission and transmission mechanism provided with flexible adjusting structure

Abstract

The utility model discloses a flexible adjusting structure for gear rack transmission, which comprises a mounting plate and side baffles detachably connected to the left side and the right side of the mounting plate through a plurality of elastic connecting pieces respectively, and the mounting plate can slide back and forth between the two side baffles under the action of external force. In order to meet the meshing requirement of the bevel gear, the sides, close to the mounting plate, of the side baffles are provided with second inclined faces inclining downwards, the second inclined faces of the two side baffles form a dovetail groove structure with an upper opening smaller than a lower opening, and the two sides of the mounting plate are each provided with a first inclined face matched with the second inclined face and slidably connected with the second inclined face. The utility model further discloses a transmission mechanism provided with the flexible adjusting structure. According to the flexible adjusting structure for gear and rack transmission and the transmission mechanism provided with the flexible adjusting structure, flexible meshing of the gear and the rack is achieved by means of the weak rigidity of the elastic connecting piece in a tiny range, the installation requirements of a guide rail and the rack are lowered, and the overall precision of equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission, and in particular relates to a flexible adjustment structure for gear rack transmission and a transmission mechanism equipped with the structure. Background Art

[0002] At present, with the rapid development of science and technology and the increasing market demand, the processing format requirements for laser cutting machines are also increasing, which directly leads to the X and Y axis travel of cutting equipment becoming longer and longer. In the long travel, maintaining the positioning accuracy and repeat positioning accuracy of the equipment requires very high adjustment of the guide rail, gear and rack. The parallelism error between the guide rail and the rack needs to be controlled within a very small range. When there is a gap between the gear and the rack, the accuracy of the equipment will drop sharply. Therefore, it is very important to ensure that the gear and rack maintain good meshing when the equipment moves over a long travel.

[0003] Fig.10 and Fig.11 The three-dimensional schematic diagram and the side schematic diagram of the structure of the existing gear rack transmission mechanism are shown. The base 10' is provided with a guide rail 5' and a rack 6' parallel to each other. The guide rail 5' is provided with a mobile platform 4' through a slider 8'. The mobile platform 4' is installed with a reducer mounting plate 1'. The reducer mounting plate 1' is installed with a reducer 71'. The input end of the reducer 71' is installed with a servo motor 72', and the output end is installed with a gear 9' meshing with the rack 6'. When the servo motor 72' drives the reducer 71' and the gear 9' to move along the guide rail 5', in a long stroke, due to the error in the parallelism between the guide rail 5' and the rack 6', the gear rack will have interference or clearance during the theoretical position meshing process. In order to avoid gear breakage, the traditional solution takes the maximum interference position of the gear rack as the 0 reference, so that the gear rack meshing is in a clearance state within the full stroke. When the stroke is too long, due to processing and assembly errors, the gear rack clearance will be enlarged, resulting in an increase in the positioning accuracy and repeat positioning accuracy errors of the equipment. Utility Model Content

[0004] In view of the technical problems existing in the background technology, the utility model provides a flexible adjustment structure for gear rack transmission and a transmission mechanism equipped with the structure, which utilizes the weak stiffness of the elastic connecting part in a small range to achieve flexible meshing of the gear and the rack, reduce the installation requirements of the guide rail and the rack, and improve the overall accuracy of the equipment.

[0005] The technical solution of the utility model to solve the technical problem is as follows:

[0006] The utility model discloses a flexible adjustment structure for gear rack transmission, which comprises a mounting plate and side baffles which are detachably connected to the left and right sides of the mounting plate through a plurality of elastic connecting pieces respectively. The mounting plate can slide forward and backward between the two side baffles under the action of external force.

[0007] Furthermore, a second inclined surface inclined downward is provided on one side of the side baffle plate close to the mounting plate, and the second inclined surfaces of the two side baffle plates form a dovetail groove structure with an upper opening smaller than a lower opening, and first inclined surfaces that are adapted to and slidably connected to the second inclined surface are respectively provided on both sides of the mounting plate.

[0008] Furthermore, the elastic connecting members are detachably connected to the four corners of the mounting plate and the ends corresponding to the side baffles.

[0009] Furthermore, the four corners of the mounting plate are provided with corresponding first mounting grooves and second mounting grooves at the ends corresponding to the side baffles, and the mounting plates at each of the first mounting grooves are vertically provided with first fixing holes that are connected to the first mounting grooves, and the side baffles at each of the second mounting grooves are vertically provided with second fixing holes that are connected to the second mounting grooves, and the middle parts of the left and right sides of the mounting plate and the middle parts of the two side baffles are respectively provided with corresponding and slidably connected first protrusions and second protrusions, and the elastic connecting member is a spring sheet, and the two ends of each of the spring sheets are respectively placed in the corresponding first mounting groove and the second mounting groove, and the ends of the spring sheets are fixed by bolts respectively penetrating the first fixing hole and the second fixing hole.

[0010] Furthermore, a first vertical surface is arranged below the first inclined surface of the mounting plate, and a second vertical surface is arranged above the second inclined surface of the side baffle.

[0011] The utility model is a transmission mechanism equipped with a flexible adjustment structure for gear rack transmission described in the above technical solution, characterized in that it includes a base, on which are fixedly provided guide rails and racks parallel to each other, on which a movable platform is provided via a slider, the flexible adjustment structure is detachably connected and fixed to the movable platform via two side baffles, a driving device is detachably mounted on the mounting plate, and a gear meshing with the rack is mounted on the output end of the driving device.

[0012] Furthermore, the driving device includes a motor, an output end of the motor is connected to a reducer, the reducer is detachably connected to the mounting plate, and the gear is mounted on an output shaft of the reducer.

[0013] Compared with the prior art, the utility model provides a flexible adjustment structure for a gear rack transmission and a transmission mechanism equipped with the structure, which has the following beneficial effects:

[0014] (1) The structural design of the utility model is novel, simple and reasonable. The flexible engagement of the gear and the rack is achieved by the elastic connecting piece arranged between the mounting plate and the two side baffles, which reduces the installation requirements of the guide rail and the rack and improves the overall accuracy of the equipment.

[0015] (2) The utility model provides a second inclined surface on the side of the two side baffles corresponding to the mounting plate to form a dovetail groove structure, so that the mounting plate can slide back and forth between the two side baffles without moving up and down. When the flexible adjustment structure is installed on the transmission mechanism, even if the helical gears are meshed, the mounting plate will not fall out due to the axial force of the gears.

[0016] (3) In the utility model, the elastic connecting member is a spring sheet, and the four corners of the mounting plate corresponding to the ends of the side baffle are respectively provided with corresponding first mounting grooves and second mounting grooves, and the mounting plate at each first mounting groove is respectively vertically provided with a first fixing hole that is connected with the first mounting groove, and the side baffle at the second mounting groove is respectively vertically provided with a second fixing hole that is connected with the second mounting groove, so as to facilitate the installation of the spring sheet between the mounting plate and the side baffle, and utilize the weaker stiffness within a small range of the spring sheet to realize the flexible meshing of the gear and the rack.

[0017] (4) In the utility model, the middle parts of the left and right sides of the mounting plate and the middle parts of the two side baffles are respectively provided with corresponding and slidably connected first protrusions and second protrusions, which are convenient for the installation of each elastic connecting member, and reduce the material and weight of the mounting plate and the side baffles themselves, reduce costs, and at the same time reduce the sliding surface between the mounting plate and the side baffles, thereby reducing friction and facilitating the flexible engagement of the gear and the rack.

[0018] (5) In the present invention, a first vertical surface and a second vertical surface are respectively arranged on the mounting plate and the side baffle plate, so as to further reduce the contact area between the first inclined surface and the second inclined surface and reduce the friction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the flexible adjustment structure for the gear rack transmission of the utility model;

[0020] Figure 2 It is a schematic diagram of the top view of the flexible adjustment structure for the gear rack transmission of the utility model;

[0021] Figure 3 yes Figure 2 AA direction schematic diagram;

[0022] Figure 4 It is a structural schematic diagram of the mounting plate in the utility model;

[0023] Figure 5 yes Figure 4 CC direction schematic diagram;

[0024] Figure 6 It is a structural schematic diagram of the side baffle in the utility model;

[0025] Figure 7 yes Figure 6 BB direction schematic diagram;

[0026] Figure 8 It is a three-dimensional schematic diagram of the transmission mechanism of the utility model;

[0027] Fig. 9 It is a side schematic diagram of the transmission mechanism of the utility model;

[0028] Fig.10 It is a three-dimensional schematic diagram of an existing gear rack transmission mechanism;

[0029] Fig.11 It is a side schematic diagram of an existing rack and pinion transmission mechanism;

[0030] Figure 1-9 In: 1. Mounting plate; 11. First fixing hole; 12. First mounting groove; 13. Center through hole; 14. First connecting hole; 15. First inclined plane; 16. First vertical plane; 17. First protrusion; 2. Elastic connecting member; 3. Side baffle; 31. Second fixing hole; 32. Second mounting groove; 33. Second connecting hole; 34. Second protrusion; 35. Second inclined plane; 36. Second vertical plane; 4. Moving platform; 5. Guide rail; 6. Rack; 7. Driving device; 71. Reducer; 72. Motor; 8. Slider; 9. Gear; 10. Base.

[0031] Figure 10-11 Middle: 1', reducer mounting plate; 4', mobile platform; 5', guide rail; 6', rack; 71', reducer; 72', servo motor; 8', slider; 9', gear; 10', base. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the disclosure belongs. The "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. The places not described in detail in the utility model are all known technologies of technicians in the technical field.

[0033] Embodiment 1:

[0034] like Figure 1-Figure 7 As shown, the utility model is a flexible adjustment structure for a gear rack transmission, which includes a mounting plate 1 and side baffles 3 detachably connected to the left and right sides of the mounting plate 1 through a plurality of elastic connectors 2, respectively. The mounting plate 1 can slide forward and backward between the two side baffles 3 under the action of an external force. In this embodiment, a plurality of first connection holes 14 are provided on the mounting plate 1 for installing a driving device, and a central through hole 13 is provided at the center thereof, and the output shaft of the driving device extends from the central through hole and installs a gear, and a plurality of second connection holes 33 are provided on the side baffle 3 for easy fixation. In this embodiment, the mounting plate 1 is limited by the left and right side baffles 3. Under the action of an external force forward or backward, due to the elastic action of the elastic connector 1, the mounting plate 1 can slide forward or backward between the two side baffles 3 within the deformation range of the elastic connector 1.

[0035] Embodiment 2:

[0036] like Figure 1-7 As shown, on the basis of Example 1, the utility model provides a flexible adjustment structure for a gear rack transmission, wherein the side baffle plate 3 is provided with a second inclined surface 35 inclined downwardly close to the side of the mounting plate 1, and the second inclined surfaces 35 of the two side baffle plates 3 form a dovetail groove structure with an upper opening smaller than the lower opening, and the two sides of the mounting plate 1 are respectively provided with first inclined surfaces 15 adapted to and slidably connected with the second inclined surfaces 35, that is, the two sides of the mounting plate 1 are arranged to form a dovetail structure adapted to the above-mentioned dovetail groove, so that the mounting plate 1 can only move forward and backward between the two side baffle plates 3 under the action of external force, and will not move in the up and down directions, which is convenient for application in occasions where helical gears are meshing.

[0037] Embodiment 3:

[0038] On the basis of Embodiment 1 or 2, the flexible adjustment structure for gear rack transmission described in the utility model, the elastic connector 2 is detachably connected to the four corners of the mounting plate 1 and the ends corresponding to the side baffle 3, that is, 4 sets of elastic connectors 2 are used. Further, the four corners of the mounting plate 1 and the ends corresponding to the side baffle 3 are respectively provided with corresponding first mounting grooves 12 and second mounting grooves 32, the mounting plate 1 at each of the first mounting grooves 12 is respectively vertically provided with a first fixing hole 11 intersecting the first mounting groove 12, and the side baffle 3 at each of the second mounting grooves 32 is respectively vertically provided with a second fixing hole 31 intersecting the second mounting groove 32, the middle of the left and right sides of the mounting plate 1 and the middle of the two side baffles 3 are respectively provided with corresponding and slidably connected first protrusions 17 and second protrusions 34, the elastic connector 2 is a spring sheet, the two ends of each of the spring sheets are respectively placed in the corresponding first mounting grooves 12 and second mounting grooves 32, and the ends of the spring sheets are fixed by bolts respectively penetrating the first fixing holes 11 and second fixing holes 31. In this embodiment, the spring connector 2 is configured as a spring sheet, which is convenient for installation and utilizes the relatively weak stiffness of the spring sheet in a small range to enable the mounting plate 1 to move forward and backward within the deformation range of the spring sheet when subjected to external force; the first protrusion 17 and the second protrusion 34 are configured to effectively reduce the manufacturing materials of the mounting plate 1 and the side baffle 3, reduce the weight and cost of both, and also reduce the friction between the two.

[0039] In this embodiment, in order to further reduce the friction between the mounting plate and the side baffle, a first vertical surface 16 is provided below the first inclined surface 15 of the mounting plate 1 , and a second vertical surface 36 is provided above the second inclined surface 35 of the side baffle 3 .

[0040] Example 4

[0041] like Figure 1-Figure 9 As shown, the utility model is a transmission mechanism equipped with a flexible adjustment structure for gear rack transmission as described in any one of Examples 1-3, and further includes a base 10, on which a guide rail 5 and a rack 6 parallel to each other are fixedly arranged, and a mobile platform 4 is arranged on the guide rail 5 through a slider 8, and the flexible adjustment structure is detachably connected and fixed to the mobile platform 4 through two side baffles 3, and a driving device 7 is detachably mounted on the mounting plate 1, and a gear 9 meshing with the rack 6 is mounted at the output end of the driving device 7. Further, the driving device 7 includes a motor 72, and a reducer 71 is connected to the output end of the motor 72, and the reducer 71 is detachably connected to the mounting plate 1, and the gear 9 is mounted on the output shaft of the reducer 71.

[0042] In this embodiment, after the reducer 71 is combined with the gear 9, the whole is installed on the mounting plate 1 through the first connecting hole 14 with the bolts. The mounting plate 1 is connected to the two side baffles 3 through four sets of elastic connectors 2 (spring sheets). The side baffles 3 and the mounting plate 1 are placed horizontally on the mobile platform 4. By adjusting the position of the side baffles 3, a certain pre-tightening force is provided for the meshing of the gear 9 and the rack 6, and then the side baffles 3 and the mounting plate 1 are connected and fixed with the mobile platform 4 through the second connecting hole 33 with the bolts. When the motor 72 drives the gear 9 to rotate through the reducer 71, and through the action of the rack 6, the entire mobile platform 4 moves along the guide rail 5. During the movement, due to the certain material elasticity of the spring sheet, there is always a certain pre-tightening force to make the gear 9 and the rack 6 flexibly mesh with each other, ensuring that there is no gap between the gear and the rack. In addition, since the side baffles 3 and the mounting plate 1 can also be fixed in the form of a dovetail groove, only the mounting plate is retained to move along the deformation direction of the spring sheet, so even if the helical gears are meshed, the mounting plate will not be disengaged due to the axial force of the gear.

Claims

1. A flexible adjustment structure for a gear rack transmission, used for the flexible meshing connection between a gear installed at the output end of a driving device and a rack fixedly arranged on a base, characterized in that: It comprises a mounting plate (1) and side baffles (3) which are detachably connected to the left and right sides of the mounting plate (1) via a plurality of elastic connectors (2), and the mounting plate (1) can slide forward and backward between the two side baffles (3) under the action of an external force; The mounting plate (1) is provided with a plurality of first connection holes (14) for mounting the drive device; The side baffle (3) is provided with a plurality of second connection holes (33) for fixing the side baffle.

2. A flexible adjustment structure for a gear rack transmission according to claim 1, characterized in that: A second inclined surface (35) inclined downward is provided on one side of the side baffle (3) close to the mounting plate (1), the second inclined surfaces (35) of the two side baffles (3) forming a dovetail groove structure with an upper opening smaller than a lower opening, and first inclined surfaces (15) adapted to and slidably connected to the second inclined surfaces (35) are respectively provided on both sides of the mounting plate (1).

3. A flexible adjustment structure for a gear rack transmission according to claim 1 or 2, characterized in that: The elastic connecting members (2) are detachably connected to the four corners of the mounting plate (1) and the ends corresponding to the side baffles (3).

4. The flexible adjustment structure for a gear rack transmission according to claim 3, characterized in that: The four corners of the mounting plate (1) and the ends corresponding to the side baffles (3) are respectively provided with corresponding first mounting grooves (12) and second mounting grooves (32); the mounting plate (1) at each of the first mounting grooves (12) is respectively provided with a first fixing hole (11) vertically connected to the first mounting groove (12); the side baffles (3) at each of the second mounting grooves (32) are respectively provided with a second fixing hole (31) vertically connected to the second mounting groove (32); the middle of the left and right sides of the mounting plate (1) and the middle of the two side baffles (3) are respectively provided with corresponding first protrusions (17) and second protrusions (34) that are slidably connected; the elastic connecting member (2) is a spring sheet; the two ends of each of the spring sheets are respectively placed in the corresponding first mounting groove (12) and the second mounting groove (32); and the ends of the spring sheets are fixed by bolts respectively inserted into the first fixing hole (11) and the second fixing hole (31).

5. The flexible adjustment structure for a gear rack transmission according to claim 4, characterized in that: A first vertical surface (16) is provided below the first inclined surface (15) of the mounting plate (1), and a second vertical surface (36) is provided above the second inclined surface (35) of the side baffle plate (3).

6. A transmission mechanism equipped with the flexible adjustment structure for gear rack transmission according to any one of claims 1 to 5, characterized in that: The invention comprises a base (10), wherein a guide rail (5) and a rack (6) parallel to each other are fixedly arranged on the base (10), a movable platform (4) is arranged on the guide rail (5) via a slider (8), the flexible adjustment structure is detachably connected and fixed to the movable platform (4) via two side baffles (3), a driving device (7) is detachably mounted on the mounting plate (1), and a gear (9) meshing with the rack (6) is mounted on the output end of the driving device (7).

7. The transmission mechanism according to claim 6, characterized in that: The driving device (7) comprises a motor (72), the output end of the motor (72) is connected to a reducer (71), the reducer (71) is detachably connected to the mounting plate (1), and the gear (9) is mounted on an output shaft of the reducer (71).

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