CN216730090U - Three-dimensional motion mechanism and three-dimensional carving machine adopting same - Google Patents
Three-dimensional motion mechanism and three-dimensional carving machine adopting same Download PDFInfo
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- CN216730090U CN216730090U CN202123180789.8U CN202123180789U CN216730090U CN 216730090 U CN216730090 U CN 216730090U CN 202123180789 U CN202123180789 U CN 202123180789U CN 216730090 U CN216730090 U CN 216730090U
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Abstract
The utility model relates to a three-dimensional motion mechanism and adopt three-dimensional engraver of this mechanism. The three-dimensional movement mechanism is characterized in that a vertical movement mechanism and a transverse movement mechanism both adopt a lead screw nut mechanism, the longitudinal movement mechanism mainly comprises a gear and a rack matched with the gear, the rack is fixedly arranged on a nut of the transverse movement mechanism, the surface of the rack provided with teeth faces upwards, the gear is positioned above the rack and is meshed with the rack, the gear is arranged on a movement frame through a gear shaft, and a longitudinal driving motor for driving the gear to rotate is arranged on the movement frame. The three-dimensional engraving machine adopts the three-dimensional movement mechanism as a movement device, and an engraving head of the three-dimensional engraving machine is arranged on the movable frame. The utility model discloses be favorable to reducing the volume, still be favorable to reducing the reciprocating motion error.
Description
Technical Field
The utility model relates to a three-dimensional motion mechanism still relates to the three-dimensional engraver that adopts this mechanism.
Background
The existing engraving machine mostly adopts a laser engraving head to engrave, and drives the engraving machine to perform plane or three-dimensional movement through a movement mechanism so as to realize the engraving operation on a corresponding part, the movement mechanism mostly adopts a screw-nut mechanism to realize the movement in a corresponding direction, and a nut is driven to linearly move along the corresponding direction through the rotation of a screw rod.
SUMMERY OF THE UTILITY MODEL
For overcoming the above defect of prior art, the utility model provides a three-dimensional motion still provides the three-dimensional engraver that adopts above-mentioned mechanism, and this kind of motion is favorable to reducing the volume under the applied scene that the engraver relates to, still is favorable to reducing the reciprocating motion error.
The technical scheme of the utility model is that: the three-dimensional motion mechanism comprises a vertical moving mechanism, a transverse moving mechanism and a longitudinal moving mechanism, wherein the vertical moving mechanism and the transverse moving mechanism are respectively provided with a lead screw nut mechanism, the lead screw nut mechanism mainly comprises a lead screw and a nut in threaded fit with the lead screw, the vertical moving mechanism comprises a left base and a right base, the left base and the right base of the transverse moving mechanism are respectively and fixedly connected to the nut of the vertical moving mechanism on the corresponding side or the nut of the vertical moving mechanism on the corresponding side, the longitudinal moving mechanism mainly comprises a gear and a rack matched with the gear, the rack is fixedly arranged on the nut of the transverse moving mechanism or the nut of the transverse moving mechanism, the surface of the rack provided with teeth is upward, the gear is positioned above the rack and is meshed with the rack, and the gear is arranged on a moving frame through a gear shaft, and the moving frame is provided with a longitudinal driving motor for driving the gear to rotate.
Preferably, the movable frame comprises a left side plate and a right side plate, the rack is located between the left side plate and the right side plate, a roller shaft is connected between the left side plate and the right side plate, the gear shaft is located above the rack, the left side and the right side of the gear shaft are respectively and rotatably connected to the upper portions of the left side plate and the right side plate, the roller shaft is located below the rack, and the left side and the right side of the roller shaft are respectively and fixedly connected to the lower portions of the left side plate and the right side plate.
Preferably, a longitudinally extending guide groove is formed in the bottom surface of the rack, a roller is rotatably connected to the wheel shaft, and the top of the roller is located in the guide groove.
Preferably, the longitudinal driving motor is mounted on the left side plate or the right side plate, a weight is mounted on the right side plate or the left side plate, and the force balance of the moving frame is realized through the weight.
Preferably, the vertical moving mechanism is arranged on the three-dimensional frame, the three-dimensional frame comprises a base and a frame fixedly mounted on the base, the frame comprises two side frames respectively located on the left side and the right side, the side frames are provided with a longitudinal beam and two vertical rods respectively supported at the front end and the rear end of the longitudinal beam, the upper end and the lower end of each vertical rod are respectively and fixedly connected with the longitudinal beam and the base, and the upper portion and the lower portion of a lead screw of the vertical moving mechanism are respectively and rotatably connected to the corresponding side of the longitudinal beam and the base.
Preferably, the nut of the vertical moving mechanism is a long strip shape extending longitudinally, a screw hole used for being in threaded fit with a corresponding lead screw is arranged in the longitudinal center of the nut, the guide mechanism of the vertical moving mechanism comprises a front vertical guide post and a rear vertical guide post, the upper end and the lower end of each vertical guide post are respectively fixedly connected to a longitudinal beam of the corresponding side and a base, a front vertical guide hole and a rear vertical guide hole are arranged on the nut of the vertical moving mechanism, and the vertical guide holes are respectively sleeved on the vertical guide posts of the corresponding sides and are in sliding fit with the corresponding vertical guide posts.
Preferably, the bases of the transverse moving mechanism are longitudinally extended long strips, and the two bases are respectively located at the left side and the right side and connected to the nuts of the vertical moving mechanism at the corresponding side.
Preferably, the nut of lateral shifting mechanism is longitudinal extension's rectangular shape, and its vertical central authorities are equipped with be used for with corresponding lead screw thread fit's screw, two horizontal guiding posts around the guiding mechanism of lateral shifting mechanism includes, both ends are fixed connection respectively on the base of corresponding side about horizontal guiding post, be equipped with two horizontal guiding holes around on the nut of lateral shifting mechanism, horizontal guiding hole overlaps respectively and establishes on the horizontal guiding post of corresponding side, with corresponding horizontal guiding post sliding fit.
Three-dimensional engraver is equipped with carving head and telecontrol equipment, the telecontrol equipment adopts the utility model discloses an arbitrary kind three-dimensional motion mechanism, the carving head is installed on longitudinal movement mechanism's the removal frame.
Preferably, the engraving head is a laser engraving head.
The utility model has the advantages that: because the longitudinal moving mechanism adopts a specially-made gear and rack mechanism, a rack is used as a fixed part, and a gear meshed with the rack is positioned above the rack, the longitudinal moving mechanism can be automatically centered or in a corresponding most stable state (gravitational potential energy minimum state) by depending on the weight at any position and does not depend on the influence of the moving direction, and therefore, the system control error (which can be called reciprocating motion error) of the longitudinal position caused by longitudinal reversing basically does not exist. In the application scene of the engraving machine, the engraving machine only needs to move in one direction in the transverse direction, and the vertical moving mechanism is in the state of the minimum gravitational potential energy due to the action of gravity in the vertical direction, so that the engraving machine adopting the three-dimensional moving mechanism can effectively avoid and eliminate the reciprocating motion error of the transmission mechanism, improve the position control precision of the engraving head, particularly the consistency of the positions in the reciprocating motion, and further improve the engraving quality. Meanwhile, compared with a lead screw nut mechanism which needs to be provided with a guide mechanism with larger volume, the used longitudinal moving mechanism mainly realizes directional movement by means of meshing of a gear and a rack, which is beneficial to reducing the volume and simplifying the structure, and particularly, when a helical gear or a combined straight toothed spur gear and a corresponding rack are adopted, wherein the combined straight toothed spur gear is adjacently connected by a plurality of straight toothed spur gears with staggered distribution, the micro position deviation caused by tooth space matching can be effectively reduced or eliminated by the helical gear or the straight toothed spur with staggered distribution, and the amplitude of the position deviation can also be reduced by improving the tooth density, so that the control precision of the position is further ensured.
Drawings
Fig. 1 is a schematic view of an engraver to which the present invention relates;
fig. 2 is a schematic view (oblique upper projection) of the longitudinal movement mechanism according to the present invention;
fig. 3 is a schematic view (oblique lower projection) of the longitudinal movement mechanism according to the present invention in another direction;
FIG. 4 is an enlarged view of a portion corresponding to FIG. 3;
fig. 5 is a schematic view of the tooth distribution of the combined rack according to the present invention.
Detailed Description
Referring to fig. 1-5, the three-dimensional motion mechanism provided by the present invention includes a vertical moving mechanism, a horizontal moving mechanism and a vertical moving mechanism, and forms three-dimensional motion by the linear movement in the three mutually perpendicular directions. The vertical moving mechanism and the horizontal moving mechanism both adopt a lead screw nut mechanism, the lead screw nut mechanism can adopt a lead screw nut mechanism used by the existing moving mechanism, mainly comprises lead screws 11 and 21 and nuts 12 and 22 which are in threaded fit with the lead screws, the lead screws are limited to rotate relative to a fixed component by rotationally connecting two ends of the lead screws (for example, connecting through bearings) on a suitable fixed component, the nuts cannot rotate by being limited by a linear guide mechanism, and when the lead screws rotate, the nuts linearly move along the extending direction (axial direction) of the lead screws under the limitation of the guide mechanism.
The shape and the size of the nut can be set according to actual requirements. For example, the nut may be formed in a long strip shape, a screw hole engaged with the screw rod is provided at the center in the longitudinal direction, and light holes engaged with the corresponding guide posts 14 and 24 are provided at positions at equal intervals on both sides of the screw hole, the extending direction of the guide posts is the same as the extending direction of the screw rod (the axis is parallel lines), and the movement of the nut is limited to linear movement by the engagement of the light holes and the guide posts.
Each guide post and the screw rod can be positioned on the same horizontal plane or not.
The two vertical moving mechanisms move synchronously to bring the transverse moving mechanism to ascend or descend.
Two vertical laser range finder down can all be equipped with on vertical moving mechanism's the nut, and its below is corresponding to base 51's range finding plane (being adapted to corresponding laser rangefinder's facet region), and the highly uniform of two range finding planes can be through two vertical moving mechanism the comparison of laser range finder's output (and the distance measurement value between the range finding plane), judge whether the height in place and the translation rate of two vertical moving mechanism are unanimous, and then make two vertical moving mechanism keep the unanimity of height and speed through corresponding controlling means control.
The left and right bases 26 of the transverse moving mechanism are respectively and fixedly connected to the nuts 12 of the vertical moving mechanism at the corresponding side or nuts of the vertical moving mechanism at the corresponding side are adopted (namely, the nuts of the vertical moving mechanism are used as the bases), so that when the nuts of the two vertical moving mechanisms move synchronously, the left and right bases of the transverse moving mechanism drive the transverse moving mechanism to move integrally.
The longitudinal movement mechanism mainly comprises a gear 36 and a rack 31 matched with the gear, the rack is fixedly arranged on the nut 22 of the transverse movement mechanism or the nut of the transverse movement mechanism is adopted (namely, the nut of the transverse movement mechanism is used as the rack, in this case, the nut of the transverse movement mechanism is provided with teeth of the rack), the face of the rack provided with the teeth 32 is upward, the gear is positioned above the rack and is meshed with the rack, and the gear is arranged on the moving frame through a gear shaft 37.
The front and rear portions of the rack may be respectively provided with proximity switches which generate corresponding signals through a switch state change when the moving frame approaches or contacts the corresponding proximity switches, so as to stop the movement in the corresponding direction by the control means.
The rack and the nut of the transverse moving mechanism can be rod-shaped with a rectangular cross section, the rack can be positioned below the nut of the transverse connecting mechanism, two ends of the rack are connected with corresponding sections of the nut of the transverse moving mechanism through vertical connecting rods on corresponding sides to form a square-shaped integrated structure, so that the rack moves along with the corresponding nut, a space for installing a gear and a moving frame is reserved between the rack and the nut, and the movement of the gear and the moving frame is not hindered.
The movable frame is provided with a longitudinal driving motor 38 for driving a gear (gear shaft) to rotate, the longitudinal driving motor can adopt any suitable form, generally can be a speed reducing motor provided with a speed reducer, and an output shaft of the longitudinal driving motor extends to be connected with the gear shaft through a coupling or a gear transmission mechanism and other suitable modes.
Other drive motors and the parts (e.g., screws) driven by them may also be connected in the same or the same manner.
The gear and the rack preferably adopt a helical gear and a corresponding helical rack, or adopt a combined gear and a combined rack which are composed of a plurality of (for example, 2 or 3) straight-tooth cylindrical gears and a plurality of corresponding straight-tooth racks, and each straight-tooth rack is respectively matched with and meshed with the corresponding straight-tooth cylindrical gear. The specifications of all straight toothed spur gears are the same, the straight toothed spur gears are coaxially adjacent (including gapless connection and gapped adjacency) and are connected into an integral structure, teeth on different straight toothed spur gears are distributed at equal angular intervals (or staggered distribution) in the circumferential direction, and correspondingly, teeth on different straight toothed racks are distributed at equal intervals in the extending direction of the toothed racks (see fig. 5).
The movable frame comprises a left side plate 42 and a right side plate 43, the rack is located between the left side plate and the right side plate, a roller shaft 45 is connected between the left side plate and the right side plate, the gear shaft is located above the rack, the left side and the right side of the gear shaft are respectively and rotatably connected to the upper portions of the left side plate and the right side plate, the roller shaft is located below the rack, and the left side and the right side of the gear shaft are respectively and fixedly connected to the lower portions of the left side plate and the right side plate.
A longitudinally extending guide groove 34 is provided on the bottom surface of the rack, a roller 46 is rotatably connected to the wheel shaft, and the top of the roller is located in the guide groove.
The gear and the roller clamp the rack in the middle from the upper part and the lower part of the rack respectively, and the clamping degree is controlled through proper size matching, so that the stability of the moving frame on the rack is ensured while the moving frame can move smoothly.
The guide groove is preferably an inverted trapezoidal groove, the width of the bottom opening is larger than the width of the bottom opening, the side wall of the guide groove is an inclined plane (a plane with a non-zero included angle between the side wall and the vertical plane), correspondingly, the roller is preferably a discus-shaped wheel, the thickness from the center to the edge is gradually reduced, the main body part of the side surface is conical, and the included angle between the two side surfaces from the center to the outside is slightly smaller than the included angle between the two side walls of the guide groove, so that the stability is improved.
The longitudinal driving motor is installed on the left side plate or the right side plate, a heavy object (for example, the engraving head 70 and/or a counterweight and the like) is installed on the right side plate or the left side plate, and the stress balance of the movable frame is realized through the heavy object (in a stable state, the rack is not subjected to the torque of the movable frame, or the torque is not required to be applied to the movable frame).
The vertical moving mechanism is arranged on the three-dimensional rack.
The stereo frame may include a base 51 and a frame fixedly mounted on the base.
The frame can include two side frames respectively located at the left and right sides, the side frames are provided with longitudinal beams 54 and 55 and two vertical rods 53 and 52 respectively supported at the front end and the rear end of the longitudinal beams, the upper end and the lower end of each vertical rod are respectively and fixedly connected with the corresponding longitudinal beam and the corresponding base, and the upper part and the lower part of a lead screw of the vertical moving mechanism are respectively and rotatably connected to the longitudinal beam on the corresponding side and the base.
A front cross beam 56 can be fixedly connected between the front ends of the two side longitudinal beams, and a rear cross beam 57 can be connected between the rear ends of the two side longitudinal beams, so that a three-dimensionally connected integral frame is formed.
The nut 12 of the vertical moving mechanism is in a long strip shape extending longitudinally, a screw hole used for being in threaded fit with the corresponding lead screw 11 is arranged in the longitudinal center of the nut, the guide mechanism of the vertical moving mechanism comprises a front vertical guide post and a rear vertical guide post 14, the upper end and the lower end of each vertical guide post are fixedly connected to the longitudinal beam of the corresponding side and the base respectively, a front vertical guide hole and a rear vertical guide hole are formed in the nut of the vertical moving mechanism, and the vertical guide holes are sleeved on the vertical guide posts of the corresponding sides respectively and are in sliding fit with the corresponding vertical guide posts (the fit mode that the vertical guide posts slide relatively straight lines is allowed to be matched with the vertical guide posts).
The vertical moving mechanism is provided with a vertical driving motor 18 for driving a lead screw thereof to rotate.
The vertical driving motor can be installed below the base so as to be conveniently connected with the driving of the corresponding lead screw and be beneficial to fixing and concealing. The vertical driving motor can also be arranged on the longitudinal beam on the corresponding side or at any other suitable position.
The bases 26 of the transverse moving mechanism are longitudinally extended long strips, and the number of the bases is two, and the two bases are respectively positioned at the left side and the right side and connected to the nuts of the vertical moving mechanism at the corresponding sides.
The nut 22 of transverse moving mechanism is longitudinal extension's rectangular shape, and its vertical central authorities are equipped with and are used for with the screw of corresponding lead screw 21 screw-thread fit, transverse moving mechanism's guiding mechanism includes two transverse guide post 24 around including, both ends difference fixed connection is on the base of corresponding side about transverse guide post, two transverse guide hole around being equipped with on transverse moving mechanism's the nut, the transverse guide hole overlaps respectively to be established on the transverse guide post of corresponding side, with corresponding transverse guide post sliding fit (allow the gliding cooperation mode cooperation of relative straight line between them).
The transverse moving mechanism is provided with a transverse driving motor for driving a lead screw of the transverse moving mechanism to rotate.
The transverse driving motor can be arranged on the axial outer side of the base on any side, so that the transverse driving motor is conveniently in driving connection with the corresponding lead screw. The transverse drive motor may be mounted in any other suitable location.
And a gap for arranging the transverse driving motor is reserved between the base for mounting the transverse driving motor and the nut of the corresponding side vertical moving mechanism.
Three-dimensional engraver is equipped with carving head 70 and telecontrol equipment, the telecontrol equipment adopts the utility model discloses an arbitrary kind three-dimensional motion mechanism, the carving head is installed on longitudinal movement mechanism's the removal frame.
The engraving head may typically be a laser engraving head.
One side of the movable frame can be provided with an engraving head mounting plate. For example, when the movable frame is provided with a left side plate and a right side plate, the left side plate or the right side plate can be used as the engraving head mounting plate, the engraving head is mounted on the engraving head mounting plate through a rotating holder (a support capable of rotating in any direction), and the orientation (posture) of the engraving head can be adjusted through the rotating holder. The rotating head may be of any suitable prior art.
The preferred and optional technical means disclosed in the present invention can be combined arbitrarily to form a plurality of different technical solutions, except for the specific description and the further limitation that one preferred or optional technical means is another technical means.
Claims (10)
1. The three-dimensional motion mechanism comprises a vertical motion mechanism, a transverse motion mechanism and a longitudinal motion mechanism, wherein the vertical motion mechanism and the transverse motion mechanism adopt lead screw nut mechanisms, the lead screw nut mechanisms mainly comprise lead screws and nuts in threaded fit with the lead screws, the vertical motion mechanism comprises a left base and a right base, the left base and the right base of the transverse motion mechanism are respectively and fixedly connected to the nuts of the vertical motion mechanism on the corresponding side or the nuts of the vertical motion mechanism on the corresponding side, the three-dimensional motion mechanism is characterized in that the longitudinal motion mechanism mainly comprises gears and racks matched with the gears, the racks are fixedly arranged on the nuts of the transverse motion mechanism or the nuts of the transverse motion mechanism, the surfaces of the teeth on the racks face upwards, the gears are positioned above the racks and are meshed with the racks, the gear passes through the gear shaft and installs on removing the frame, it is used for driving gear revolve's vertical driving motor to remove to be provided with on the frame.
2. The three-dimensional motion mechanism according to claim 1, wherein the movable frame comprises a left side plate and a right side plate, the rack is located between the left side plate and the right side plate, a roller shaft is connected between the left side plate and the right side plate, the gear shaft is located above the rack, the left side and the right side of the gear shaft are respectively and rotatably connected to the upper portions of the left side plate and the right side plate, the roller shaft is located below the rack, and the left side and the right side of the roller shaft are respectively and fixedly connected to the lower portions of the left side plate and the right side plate.
3. The three-dimensional motion mechanism according to claim 2, wherein the bottom surface of the rack is provided with a longitudinally extending guide groove, the wheel shaft is rotatably connected with a roller, and the top of the roller is positioned in the guide groove.
4. The three-dimensional motion mechanism according to claim 3, wherein the longitudinal driving motor is mounted on the left side plate or the right side plate, and a weight is mounted on the right side plate or the left side plate, so that the force balance of the moving frame is realized through the weight.
5. The three-dimensional motion mechanism as claimed in any one of claims 1 to 4, wherein the vertical moving mechanism is disposed on a three-dimensional frame, the three-dimensional frame comprises a base and a frame fixedly mounted on the base, the frame comprises two side frames respectively disposed at the left and right sides, the side frames are provided with a longitudinal beam and two vertical rods respectively supported at the front and rear ends of the longitudinal beam, the upper and lower ends of the vertical rods are respectively and fixedly connected with the longitudinal beam and the base, and the upper and lower parts of the screw rod of the vertical moving mechanism are respectively and rotatably connected to the longitudinal beam and the base at the corresponding side.
6. The three-dimensional motion mechanism as claimed in claim 5, wherein the nut of the vertical moving mechanism is a long strip extending longitudinally, a screw hole for screw-fitting with a corresponding screw is provided at the longitudinal center of the nut, the guiding mechanism of the vertical moving mechanism comprises a front vertical guiding post and a rear vertical guiding post, the upper end and the lower end of the vertical guiding post are respectively fixedly connected to the longitudinal beam and the base at the corresponding side, the nut of the vertical moving mechanism is provided with a front vertical guiding hole and a rear vertical guiding hole, and the vertical guiding holes are respectively sleeved on the vertical guiding posts at the corresponding sides and slidably fitted with the corresponding vertical guiding posts.
7. The three-dimensional motion mechanism according to claim 6, wherein the base of the lateral motion mechanism is a longitudinally extending strip, two in number, respectively located at the left and right sides, and connected to the nut of the vertical motion mechanism at the corresponding side.
8. The three-dimensional motion mechanism as claimed in claim 7, wherein the nut of the lateral motion mechanism is a longitudinally extending elongated bar, a screw hole is formed at the longitudinal center of the nut for threaded engagement with the corresponding lead screw, the guiding mechanism of the lateral motion mechanism includes a front lateral guiding post and a rear lateral guiding post, the left and right ends of the lateral guiding post are respectively fixedly connected to the bases on the corresponding sides, the nut of the lateral motion mechanism is provided with a front lateral guiding hole and a rear lateral guiding hole, and the lateral guiding holes are respectively sleeved on the lateral guiding posts on the corresponding sides and slidably engaged with the corresponding lateral guiding posts.
9. Three-dimensional engraving machine provided with an engraving head and a movement device, characterized in that the movement device adopts the three-dimensional movement mechanism of claim 1, and the engraving head is mounted on a moving frame of the longitudinal movement mechanism.
10. The three-dimensional engraving machine according to claim 9, wherein the engraving head is a laser engraving head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123180789.8U CN216730090U (en) | 2021-12-17 | 2021-12-17 | Three-dimensional motion mechanism and three-dimensional carving machine adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123180789.8U CN216730090U (en) | 2021-12-17 | 2021-12-17 | Three-dimensional motion mechanism and three-dimensional carving machine adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216730090U true CN216730090U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123180789.8U Active CN216730090U (en) | 2021-12-17 | 2021-12-17 | Three-dimensional motion mechanism and three-dimensional carving machine adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216730090U (en) |
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2021
- 2021-12-17 CN CN202123180789.8U patent/CN216730090U/en active Active
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