CN113245713A

CN113245713A - Marking machine convenient for positioning multiple surfaces

Info

Publication number: CN113245713A
Application number: CN202110797896.0A
Authority: CN
Inventors: 刘秀丽
Original assignee: Jiangsu Zhongwangxin Intelligent Equipment Co ltd
Current assignee: Jiangsu Zhongwangxin Intelligent Equipment Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-08-13
Anticipated expiration: 2041-07-15
Also published as: CN113245713B

Abstract

The invention relates to the technical field of laser marking devices, in particular to a marking machine convenient for positioning multiple surfaces, which comprises a marking machine body, wherein a marking structure is arranged at the top end of the marking machine body, a maintenance structure is arranged on the marking structure, a clamping structure is arranged on the marking machine body, a positioning structure is arranged at one end of the clamping structure, a placing structure is arranged at one side of the marking machine body, and a limiting structure is arranged at one end of the marking machine body; through installing clamping structure on the marking machine body, can carry out centre gripping work through pneumatic mode, treat the work piece that beat the target outward appearance and be the cylinder structure automatically, avoid the work piece directly to place and lead to the work piece to beat the condition that the mark appears rocking the aversion, guarantee to beat the mark effect, and the centre gripping subassembly adopts the mechanical principle of lever to can make the more firm condition of work piece centre gripping by the centre gripping.

Description

Marking machine convenient for positioning multiple surfaces

Technical Field

The invention relates to the technical field of laser marking devices, in particular to a marking machine convenient for positioning multiple surfaces.

Background

Laser marking technology is one of the largest application areas of laser processing. Laser marking is a marking method in which a workpiece is irradiated locally with high-energy-density laser to vaporize a surface layer material or to undergo a chemical reaction of color change, thereby leaving a permanent mark.

At present, when a workpiece or a product with a cylindrical appearance is subjected to laser marking, the workpiece is generally directly placed on a worktable, so that the situation that the quality of the workpiece is reduced due to displacement marking can be caused, and when the general cylindrical workpiece is clamped by a bench clamp and the like, the clamping and positioning are inconvenient, and the situation that the quality of the marking is reduced can also be caused; the marking machine is through lead screw cooperation thread piece height control when adjusting, uses for a long time, if untimely carry out oiling lubrication, probably causes the card to die the condition that causes the precision to reduce, and because marking machine's table surface's area is limited, also very inconvenient when placing, taking the work piece.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a marking machine which can conveniently position multiple surfaces.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a convenient marking machine to multiaspect location, includes the marking machine body, the mark structure is beaten to the top of marking machine body is installed, beat and be provided with maintenance structure on the mark structure, install the clamping structure on the marking machine body the one end installation location structure of clamping structure one side of marking machine body is provided with places the structure the one end of marking machine body is equipped with limit structure.

Specifically, beat mark structure and include the stand the inside of stand is rotated and is connected with the lead screw the inside sliding connection of stand has the elevator that is T shape structure, just elevator and lead screw threaded connection the both ends fixedly connected with support of elevator install the mark ware of beating on the support the top fixedly connected with connecting rod of lead screw the connecting rod top fixedly connected with changes the handle.

Specifically, the maintenance structure includes the oil tank the inside fixedly connected with guide bar of oil tank the outside sliding connection of guide bar has the piston, just piston and guide bar sliding connection the outside cover of guide bar is equipped with first spring the first check valve of fixedly connected with on the piston the bottom fixedly connected with second check valve of oil tank the one end fixedly connected with oil pipe of second check valve, just oil pipe's the other end extends to the inside of elevator.

Specifically, the top of oil tank is rotated and is connected with the pivot the first belt pulley of outside fixedly connected with of pivot the outside fixedly connected with second belt pulley of connecting rod, just first belt pulley and second belt pulley carry out the transmission through the drive belt the bottom fixedly connected with carousel of pivot the bottom fixedly connected with fore-set of carousel.

Specifically, the guide bar is the cuboid structure, the cross-section of piston is the trapezium structure, the bottom of fore-set is the hemisphere structure, the outside diameter of first belt pulley is greater than the outside diameter of second belt pulley.

The clamping structure comprises a fixing sleeve, the top end of the marking machine body is fixedly connected with a fixing sleeve, one end of the fixing sleeve is fixedly connected with a cylinder, the inner portion of the fixing sleeve is slidably connected with a moving block, two ends of the moving block are slidably connected with two first sliding blocks in a symmetrical relation, the moving block is connected with a telescopic rod of the cylinder, two clamping blocks in a symmetrical relation are slidably connected to the inner portion of the fixing sleeve, a second sliding block is slidably connected to the inner portion of the clamping blocks, two rotating rods are rotatably connected to the inner portion of the fixing sleeve in a symmetrical relation, and the two ends of the rotating rods are respectively rotatably connected with the first sliding blocks and the second sliding blocks.

Specifically, first slider and second slider all are "concave" shape structure, two the outward appearance of clamp splice is T shape structure, the distance of the self turning point of dwang to the turning point of first slider is greater than the distance to the turning point of second slider.

Specifically, location structure includes splint two the one end of clamp splice is splint of fixedly connected with respectively the inside sliding connection of splint has the locating plate that one end has the triangle-shaped breach be the symmetric relation rotation on the locating plate and be connected with two guide rolls install the second spring between splint and the locating plate.

The marking machine comprises a marking machine body, and is characterized in that a placing structure comprises a placing plate, wherein the one end of the marking machine body is connected with the placing plate in a rotating mode, the inner side of the placing plate is provided with a limiting groove, the cross section of the limiting groove is trapezoidal, a containing groove is formed in the marking machine body, a supporting plate is connected to the inside of the containing groove in a rotating mode, the supporting plate can be inserted into the limiting groove and horizontally supports the placing plate, a plurality of slots are formed in the placing plate, and the baffle can be vertically fixed with the placing plate through inserting the slots through inserting plates.

Specifically, limit structure includes the sliding sleeve the one end fixedly connected with sliding sleeve of marking machine body the inside sliding connection of sliding sleeve has the limiting plate the one end fixedly connected with fixed block of limiting plate, just the fixed block also with sliding sleeve sliding connection install the third spring between fixed block and the sliding sleeve the bottom fixedly connected with footboard of limiting plate.

The invention has the beneficial effects that:

(1) according to the marking machine convenient for positioning the multiple surfaces, the marking structure is arranged on the marking machine body, so that the marking work can be performed on a workpiece with a cylindrical appearance, the height adjustment of the marking assembly can be performed conveniently, the maintenance structure can be driven to work synchronously while the marking structure performs adjustment action, the movable assembly of the marking structure can be lubricated and maintained through the maintenance structure, the movable assembly can be prevented from being stuck, the movement precision of the transmission assembly can be improved, the adjustment work of the marking assembly can be performed conveniently, and the marking precision can be improved.

(2) According to the marking machine convenient for positioning the multiple surfaces, the clamping structure is arranged on the marking machine body, a workpiece with a cylindrical appearance and to be marked can be automatically clamped in a pneumatic mode, the situation that the workpiece is shaken and shifted due to the fact that the workpiece is directly placed is avoided, the marking effect is guaranteed, the clamping assembly adopts the mechanical principle of a lever, the clamped workpiece can be clamped more stably, the positioning structure is matched, the multiple surfaces of the placed workpiece can be automatically positioned, manual repeated placement is not needed, and therefore marking precision and marking efficiency can be greatly improved.

(3) According to the marking machine convenient for positioning the multiple surfaces, the placing structure is arranged on one side of the marking machine body, so that a placing platform can be provided when a workpiece which is marked or to be marked is required to be placed temporarily, the platform can be rotatably stored, the occupied area when the marking machine is not used is not influenced, the platform can be limited and blocked when being stored by matching with the arrangement of the limiting structure, and the condition that the platform is automatically rotated out is avoided.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of the overall structure of a preferred embodiment of a marking machine convenient for positioning multiple surfaces according to the present invention;

FIG. 2 is an enlarged view of the part A shown in FIG. 1;

FIG. 3 is an enlarged view of the structure of the portion B shown in FIG. 1;

FIG. 4 is a schematic view of a connection structure between the marking machine body and the maintenance structure shown in FIG. 1;

FIG. 5 is an enlarged view of the structure of the portion C shown in FIG. 4;

FIG. 6 is a schematic structural view of the clamping structure shown in FIG. 1;

FIG. 7 is a schematic structural view of the first slider shown in FIG. 6;

FIG. 8 is a schematic structural view of the positioning structure shown in FIG. 1;

FIG. 9 is a schematic view of the connection structure of the marking machine body and the placement structure shown in FIG. 1;

fig. 10 is an enlarged view of the structure of the portion D shown in fig. 9.

In the figure: 1. marking machine body, 2, marking structure, 21, upright post, 22, lifting block, 23, bracket, 24, marking device, 25, rotating handle, 26, screw rod, 27, connecting rod, 3, maintenance structure, 31, oil tank, 32, rotating shaft, 33, first belt pulley, 34, transmission belt, 35, second belt pulley, 36, rotating disc, 37, top post, 38, guide rod, 39, piston, 39a, first spring, 39b, first one-way valve, 39c, second one-way valve, 39d, oil pipe, 4, clamping structure, 41, fixing sleeve, 42, cylinder, 43, clamping block, 44, moving block, 45, first slide block, 46, rotating rod, 47, second slide block, 5, positioning structure, 51, clamping plate, 52, positioning plate, 53, guide roller, 54, second spring, 6, placing structure, 61, placing plate, 62, inserting groove, 63, baffle, 64, inserting plate, 65 and limiting groove, 66. supporting plate, 67, accomodate the groove, 7, limit structure, 71, sliding sleeve, 72, fixed block, 73, third spring, 74, limiting plate, 75, footboard.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-10, the marking machine convenient for positioning multiple surfaces comprises a marking machine body 1, wherein a marking structure 2 is mounted at the top end of the marking machine body 1, a maintenance structure 3 is arranged on the marking structure 2, a clamping structure 4 is mounted on the marking machine body 1, a positioning structure 5 is mounted at one end of the clamping structure 4, a placing structure 6 is arranged at one side of the marking machine body 1, and a limiting structure 7 is arranged at one end of the marking machine body 1.

Specifically, beat mark structure 2 and include stand 21 the inside of stand 21 is rotated and is connected with lead screw 26 the inside sliding connection of stand 21 has the elevator 22 that is T shape structure, just elevator 22 and lead screw 26 threaded connection the both ends fixedly connected with support 23 of elevator 22 install marker 24 on the support 23 the top fixedly connected with connecting rod 27 of lead screw 26 the fixedly connected with in connecting rod 27 top changes 25.

Specifically, maintenance structure 3 includes oil tank 31 the inside fixedly connected with guide bar 38 of oil tank 31 the outside sliding connection of guide bar 38 has piston 39, just piston 39 and guide bar 38 sliding connection the outside cover of guide bar 38 is equipped with first spring 39a fixedly connected with first check valve 39b on the piston 39 the bottom fixedly connected with second check valve 39c of oil tank 31 the one end fixedly connected with oil pipe 39d of second check valve 39c, just the other end of oil pipe 39d extends to the inside of elevator 22.

Specifically, the top of oil tank 31 is rotated and is connected with pivot 32 the first belt pulley 33 of outside fixedly connected with of pivot 32 the outside fixedly connected with second belt pulley 35 of connecting rod 27, just first belt pulley 33 and second belt pulley 35 carry out the transmission through drive belt 34 the bottom fixedly connected with carousel 36 of pivot 32 the bottom fixedly connected with fore-set 37 of carousel 36.

Specifically, guide bar 38 is the cuboid structure, piston 39's cross-section is the trapezium structure, the bottom of fore-set 37 is the hemisphere structure, the outside diameter of first belt pulley 33 is greater than the outside diameter of second belt pulley 35.

Specifically, clamping structure 4 includes fixed cover 41 the fixed cover 41 of top fixedly connected with of marking machine body 1 the one end fixedly connected with cylinder 42 of fixed cover 41 the inside sliding connection of fixed cover 41 has the movable block 44 the both ends of movable block 44 are symmetrical relation sliding connection and have two first sliders 45, the movable block 44 is connected with cylinder 42's telescopic link fixed cover 41's inside sliding connection has two clamp splice 43 that are symmetrical relation, two the equal sliding connection in inside of clamp splice 43 has second slider 47 fixed cover 41's inside is symmetrical relation and rotates and is connected with two dwang 46, and two dwang 46's both ends rotate with first slider 45 and second slider 47 respectively and are connected.

Specifically, the first slider 45 and the second slider 47 are both in a concave structure, the appearance of the two clamping blocks 43 is in a T-shaped structure, and the distance from the self rotation point of the rotating rod 46 to the rotation point of the first slider 45 is greater than the distance from the self rotation point of the rotating rod to the rotation point of the second slider 47.

Specifically, the positioning structure 5 comprises a clamping plate 51, two clamping blocks 43 are fixedly connected at one end thereof with one clamping plate 51 respectively, a positioning plate 52 with one end having a triangular notch is slidably connected inside the clamping plate 51, two guide rollers 53 are rotatably connected on the positioning plate 52 in a symmetrical relationship, and a second spring 54 is installed between the clamping plate 51 and the positioning plate 52.

Specifically, place structure 6 including placing board 61 the one end of marking machine body 1 is rotated and is connected with and places board 61 the inboard of placing board 61 is equipped with the cross-section and is trapezoidal spacing groove 65 marking machine body 1's inside is equipped with accomodates groove 67 accomodate the inside rotation of groove 67 is connected with backup pad 66, backup pad 66 can insert the inside of spacing groove 65 and will place board 61 and carry out the level support place be equipped with a plurality of slots 62 on placing board 61, baffle 63 can insert slot 62 through picture peg 64 and place board 61 and carry out the vertical fixation.

Specifically, limit structure 7 includes sliding sleeve 71 the one end fixedly connected with sliding sleeve 71 of marking machine body 1 the inside sliding connection of sliding sleeve 71 has limiting plate 74 the one end fixedly connected with fixed block 72 of limiting plate 74, just fixed block 72 also with sliding sleeve 71 sliding connection install third spring 73 between fixed block 72 and the sliding sleeve 71 the bottom fixedly connected with footboard 75 of limiting plate 74.

When the invention is used, when the top end face of a workpiece which is required to be marked and has a cylindrical appearance is marked, the air cylinder 42 connected with an external air pressure system extends out, the telescopic rod of the air cylinder 42 pushes the moving block 44 to slide, the moving block 44 slides to drive the rotating rod 46 which rotates with the first sliding block 45 to rotate, the rotating rod 46 is rotationally connected with the clamping blocks 43 through the second sliding block 47, so that the two clamping blocks 43 are driven to open, the workpiece can be placed between the two clamping blocks 43, the air cylinder 42 retracts to drive the two clamping blocks 43 to approach, as the two clamping blocks 43 are respectively fixed with one clamping plate 51, the positioning plate 52 with a triangular notch at one end slides in the two clamping plates 51, when the two positioning plates 52 approach each other, the two positioning plates 52 can simultaneously abut against and position a plurality of surfaces of a workpiece, the two positioning plates 52 are rotatably connected with two guide rollers 53, the four guide rollers 53 can automatically furl and position the workpiece when the positioning plates 52 clamp the workpiece, and prevent the workpiece from abutting against and being stuck with the positioning plates 52, and a second spring 54 is further arranged between the two positioning plates 52 and the clamping plate 51, so that the elastic clamping effect can be achieved, the workpiece can be prevented from being damaged, the clamping property can be increased, the marking effect can be improved, when the marking effect needs to be adjusted, only the rotating handle 25 needs to be rotated at the top end of the upright post 21, because the rotating handle 25 is connected with the screw rod 26 through the connecting rod 27, the screw rod 26 can rotate under the rotation of the rotating handle 25, and the rotation of the screw rod 26 can drive the lifting block 22 in threaded connection with the screw rod to slide up and down in the upright post 21, the marking device 24 fixed with the lifting block 22 through the bracket 23 can be driven to slide up and down to adjust, so as to adjust different marking effects, because the second belt pulley 35 is fixedly connected to the outside of the connecting rod 27, and the second belt pulley 35 is in transmission with the first belt pulley 33 fixed to the outside of the rotating shaft 32 through the transmission belt 34, when the rotating handle 25 is rotated to adjust the marking device 24, the rotating shaft 32 can be driven to rotate at the same time, because the rotating disc 36 is fixedly connected to the bottom end of the rotating shaft 32, and the top pillar 37 is fixedly connected to the bottom end of the rotating disc 36, the top pillar 37 can be rotated when the rotating shaft 32 rotates, because the piston 39 is slidably connected to the inside of the oil tank 31 through the guide rod 38, and the cross section of the piston 39 is in a trapezoidal structure, when the top pillar 37 rotates along with the rotating disc 36, the top pillar 37 intermittently presses the piston 39, lubricating oil in the oil tank 31 can be extruded into the lifting block 22 through the oil pipe 39d, and at the same time, oil can be injected and lubricated between the lifting block 22 and the screw rod 26, so that the situation that the screw rod 26 and the lifting block 22 are stuck can be avoided, and the rotation smoothness between the screw rod 26 and the lifting block 22 can be increased, so that the labor-saving effect can be achieved, and the adjustment can be more accurate, so that the marking effect is improved, through the arrangement of the first spring 39a and the two one-way valves, continuous oiling can be realized, the lubricating effect is ensured, when the height of the marking machine 24 is not adjusted, namely the piston 39 does not generate extrusion force on the inside of the oil tank 31, namely the lubricating oil in the oil tank 31 cannot automatically flow out, so that the lubricating oil saving effect can be achieved, because the placing plate 61 is rotatably connected to one end of the marking machine body 1, when the placing plate 61 is rotated to be in the same plane with the top surface of the marking machine body 1, the supporting plate 66 accommodated in the accommodating groove 67 can be rotated out, and then inserted into the limiting groove 65 to support and limit the placing plate 61, at this time, the placing plate 61 can be used for placing a workpiece to be marked or a marked workpiece, the temporary placement of the workpiece is convenient, the taking is convenient, the baffle 63 can be fixed on the placing plate 61 through the inserting plate 64 and the inserting groove 62, the workpiece placed on the placing plate 61 can be protected through the arrangement of the baffle 63, the workpiece falling condition is avoided, when the placing plate 61 is not needed to be used, only the placing plate 61 is rotated and retracted, at this time, the placing plate 61 can be accommodated and stored, the space occupation cannot be influenced, and when the placing plate 61 is rotated out or retracted, the pedal 75 needs to be firstly treaded down, because the pedal 75 is connected with the limiting plate 74, the limiting plate 74 can be driven by the pedal 75 to slide down, just can not be spacing to placing board 61, after will placing board 61 and accomodate and finish, only need loosen footboard 75, limiting plate 74 will be automatic again will place board 61 and keep out spacingly under the spring action of third spring 73, prevents to place board 61 and roll out automatically.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The marking machine convenient for positioning multiple surfaces is characterized by comprising a marking machine body (1), wherein a marking structure (2) is mounted at the top end of the marking machine body (1), a maintenance structure (3) is arranged on the marking structure (2), a clamping structure (4) is mounted on the marking machine body (1), a positioning structure (5) is mounted at one end of the clamping structure (4), a placing structure (6) is arranged at one side of the marking machine body (1), and a limiting structure (7) is arranged at one end of the marking machine body (1); the clamping structure (4) comprises a fixed sleeve (41), the top end of the marking machine body (1) is fixedly connected with the fixed sleeve (41), one end of the fixed sleeve (41) is fixedly connected with an air cylinder (42), a moving block (44) is connected in the fixed sleeve (41) in a sliding way, two first sliding blocks (45) are connected at two ends of the moving block (44) in a symmetrical relation in a sliding way, the moving block (44) is connected with a telescopic rod of the air cylinder (42), two clamping blocks (43) which are in symmetrical relation are connected in the fixed sleeve (41) in a sliding way, a second sliding block (47) is connected inside the two clamping blocks (43) in a sliding way, two rotating rods (46) are rotatably connected in the fixed sleeve (41) in a symmetrical relationship, and the two ends of the two rotating rods (46) are respectively and rotatably connected with the first sliding block (45) and the second sliding block (47).

2. The marking machine of claim 1, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: beat mark structure (2) and include stand (21) the inside of stand (21) is rotated and is connected with lead screw (26) the inside sliding connection of stand (21) has elevator (22) that is T shape structure, just elevator (22) and lead screw (26) threaded connection the both ends fixedly connected with support (23) of elevator (22) install marker (24) on support (23) the top fixedly connected with connecting rod (27) of lead screw (26) the fixedly connected with in connecting rod (27) top is changeed (25).

3. The marking machine of claim 2, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: maintenance structure (3) include oil tank (31) the inside fixedly connected with guide bar (38) of oil tank (31) the outside sliding connection of guide bar (38) has piston (39), just piston (39) and guide bar (38) sliding connection the outside cover of guide bar (38) is equipped with first spring (39 a) the first check valve (39 b) of fixedly connected with is gone up in piston (39) the bottom fixedly connected with second check valve (39 c) of oil tank (31) the one end fixedly connected with oil pipe (39 d) of second check valve (39 c), just the other end of oil pipe (39 d) extends to the inside of elevator (22).

4. The marking machine of claim 3, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: the top of oil tank (31) is rotated and is connected with pivot (32) the first belt pulley of outside fixedly connected with (33) of pivot (32) the outside fixedly connected with second belt pulley (35) of connecting rod (27), just first belt pulley (33) and second belt pulley (35) carry out the transmission through drive belt (34) the bottom fixedly connected with carousel (36) of pivot (32) the bottom fixedly connected with fore-set (37) of carousel (36).

5. The marking machine of claim 4, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: guide bar (38) are the cuboid structure, the cross-section of piston (39) is the trapezium structure, the bottom of fore-set (37) is the hemisphere structure, the outside diameter of first belt pulley (33) is greater than the outside diameter of second belt pulley (35).

6. The marking machine of claim 1, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: first slider (45) and second slider (47) all are "concave" shape structure, two the outward appearance of clamp splice (43) is T shape structure, the distance of the rotation point of self rotation point to first slider (45) of dwang (46) is greater than the distance to the rotation point of second slider (47).

7. The marking machine of claim 6, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: location structure (5) are including splint (51), two splint (51) of one end difference fixedly connected with of clamp splice (43) the inside sliding connection of splint (51) has one end to have locating plate (52) of triangle-shaped breach be symmetrical relation rotation connection has two guide rolls (53) on locating plate (52) install second spring (54) between splint (51) and locating plate (52).

8. The marking machine of claim 1, wherein the marking machine is adapted to facilitate positioning of multiple surfaces, and further comprises: place structure (6) including placing board (61) the one end of marking machine body (1) is rotated and is connected with and places board (61) the inboard of placing board (61) is equipped with the cross-section and is trapezoidal spacing groove (65) the inside of marking machine body (1) is equipped with accomodates groove (67) the internal rotation of accomodating groove (67) is connected with backup pad (66), backup pad (66) can insert the inside of spacing groove (65) and will place board (61) and carry out the horizontal support place and be equipped with a plurality of slots (62) on board (61), baffle (63) can insert slot (62) through picture peg (64) and carry out the vertical fixation with placing board (61).

9. The marking machine of claim 8, wherein said marking machine is adapted to facilitate positioning of multiple surfaces, said marking machine comprising: limiting structure (7) include sliding sleeve (71) the one end fixedly connected with sliding sleeve (71) of marking machine body (1) the inside sliding connection of sliding sleeve (71) has limiting plate (74) the one end fixedly connected with fixed block (72) of limiting plate (74), just fixed block (72) also with sliding sleeve (71) sliding connection install third spring (73) between fixed block (72) and sliding sleeve (71) the bottom fixedly connected with footboard (75) of limiting plate (74).