A laser handheld gun head with adjustable light spot

Abstract

The present invention proposes a laser handheld gun head with adjustable light spot, wherein a collimator is installed on a collimator base, and the collimator base is inserted into a gun head body through a through hole, so that the collimator base can be conveniently taken out and then the collimator can be replaced; the laser handheld gun head of the present invention is also provided with a fixing plate and a sleeve, so that the nozzle after the movement can be fixed by the fixing plate and the sleeve during the movement of the nozzle, so that the nozzle will not shake; the laser handheld gun head of the present invention, wherein a first wedge-shaped mirror is installed in an inner rotor and a second wedge-shaped mirror is installed in an outer rotor, and the outer rotor is rotated relative to the inner rotor through adjustment, so that the first wedge-shaped mirror and the second wedge-shaped mirror are relatively rotated, so that different angle differences are generated between the first wedge-shaped mirror and the second wedge-shaped mirror, so that the refraction angle of the light path is changed, the movement of the light spot can be realized, and then the size of the light spot can be changed, so that various welding process requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing equipment, and in particular to a handheld laser gun head with adjustable light spot. Background Art

[0002] At present, laser applications in the market are becoming more and more extensive, among which laser welding is particularly prominent. The working principle of the existing laser gun head is that the laser beam is collimated by a collimating lens, then shot into a wedge-shaped mirror, and then passes through a focusing lens and a protective lens and then passes through a nozzle to perform laser processing on the workpiece. However, the collimating lens in the current laser gun head is fixed in the laser gun head, which makes it inconvenient to replace the collimating lens. Based on this, it is necessary to improve the existing laser gun head. Summary of the invention

[0003] In view of this, the present invention proposes a handheld laser gun head with adjustable light spot, which can facilitate replacement of the collimating lens.

[0004] The technical solution of the present invention is implemented as follows: the present invention proposes a handheld laser gun head with adjustable light spot, comprising: a gun head body and a collimating lens, and also a collimating lens base, the collimating lens is installed on the collimating lens base, the gun head body is provided with a through hole, and the collimating lens base is inserted into the gun head body through the through hole.

[0005] On the basis of the above technical solution, preferably, it also includes bolts, screw holes are provided at corresponding positions on the side of the collimator base and the gun head body, and the bolts are screwed into the screw holes to fix the collimator base in the gun head body.

[0006] On the basis of the above technical solution, preferably, it also includes a nozzle, which is arranged inside the front end of the gun head body and passes through the gun head body, and the nozzle can move along the gun head body.

[0007] Further preferably, it also includes a fixing plate and a sleeve, wherein the fixing plate is circumferentially fixed to the outer periphery of the front end face of the gun head body, the side of the fixing plate close to the nozzle is in contact with the nozzle, and the front end of the side of the fixing plate away from the nozzle has a first inclined surface inclined toward the nozzle, the sleeve is sleeved on the outer periphery of the fixing plate and screwed with the fixing plate, and a second inclined surface matching the first inclined surface is provided on the sleeve corresponding to the first inclined surface.

[0008] Further preferably, the portion of the fixing plate corresponding to the first inclined surface is made of elastic material.

[0009] Further preferably, it also includes a stator, a rotor, a first wedge-shaped mirror and a second wedge-shaped mirror, wherein the stator and the rotor are both located in the gun head body and in front of the collimating mirror base, the rotor can rotate relative to the stator, the rotor includes an inner rotor and an outer rotor, the first wedge-shaped mirror is installed in the inner rotor, the second wedge-shaped mirror is installed in the outer rotor, and the outer rotor is sleeved on the outer circumference of the inner rotor and can rotate relative to the inner rotor.

[0010] Further preferably, it also includes a first adjustment sleeve, a second adjustment sleeve, and an adjustment rod, the first adjustment sleeve is installed on the outer periphery of the inner rotor, the second adjustment sleeve is installed on the outer periphery of the outer rotor, the ends of the first adjustment sleeve and the second adjustment sleeve are provided with bevel gears, the adjustment rod is installed in the gun head body and is located between the first adjustment sleeve and the second adjustment sleeve, the two sides of the adjustment rod are respectively engaged with the bevel gears, and the rotation of the adjustment rod drives the outer rotor to rotate relative to the inner rotor.

[0011] Further preferably, a plurality of positioning holes are provided on the first adjustment sleeve along the circumferential direction, a spring is fixed in each positioning hole, a ball is fixed at the end of the spring, and a groove is provided on the second adjustment sleeve corresponding to the positioning hole, and the end of the ball can be clamped in the groove.

[0012] Further preferably, a mounting hole is provided on the inner wall of the gun head body, the adjusting rod is located in the mounting hole and can move along the mounting hole, and a return spring is sleeved on the outer periphery of the adjusting rod.

[0013] Further preferably, a positioning groove is also provided at the end of the adjusting rod.

[0014] The spot-adjustable laser handheld gun head of the present invention has the following beneficial effects compared with the prior art:

[0015] (1) The spot adjustable laser handheld gun head of the present invention is provided by mounting the collimator on the collimator base, and the collimator base is inserted into the gun head body through a through hole. In this way, the collimator base can be easily taken out and the collimator can be replaced.

[0016] (2) The spot adjustable laser handheld gun head of the present invention is also provided with a fixing plate and a sleeve, so that the moving nozzle can be fixed by the fixing plate and the sleeve during the movement of the nozzle, so that the nozzle will not shake;

[0017] (3) The spot-adjustable laser handheld gun head of the present invention is configured such that the first wedge-shaped mirror is installed in the inner rotor and the second wedge-shaped mirror is installed in the outer rotor. The outer rotor is adjusted to rotate relative to the inner rotor, thereby causing the first wedge-shaped mirror and the second wedge-shaped mirror to rotate relative to each other, thereby causing different angle differences between the first wedge-shaped mirror and the second wedge-shaped mirror, thereby changing the refraction angle of the light path, and realizing the movement of the spot, thereby changing the spot size, thereby being able to meet various welding process requirements;

[0018] (4) The spot adjustable laser handheld gun head of the present invention is provided with bevel gears on the outer sides of the ends of the first adjustment sleeve and the second adjustment sleeve, and the outer periphery of the end of the adjustment rod is respectively meshed with the bevel gears on the first adjustment sleeve and the second adjustment sleeve. When the adjustment rod rotates, the first adjustment sleeve and the second adjustment sleeve are driven to rotate relative to each other, thereby realizing the relative rotation of the first wedge mirror and the second wedge mirror to change the refraction angle of the light path. The first adjustment sleeve and the second adjustment sleeve can be easily and conveniently rotated relative to each other through the adjustment rod;

[0019] (5) The spot-adjustable laser handheld gun head of the present invention is also provided with a spring and a ball. When the first adjustment sleeve rotates relative to the second adjustment sleeve, the spring is compressed. When the positioning hole is rotated to be opposite to another groove, the spring returns to a natural state, and the ball is stuck in the groove. In this way, the first adjustment sleeve and the second adjustment sleeve are "glued" together, thereby achieving simultaneous and synchronous high-speed rotation of the first wedge mirror and the second wedge mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the laser handheld gun head with adjustable light spot of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the collimating mirror base of the laser handheld gun head with adjustable light spot of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the connection between the nozzle and the fixing plate of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the sleeve of the present invention;

[0025] Figure 5 It is a cross-sectional view of the spot adjustable laser handheld gun head of the present invention;

[0026] Figure 6 for Figure 5 Enlarged image of the middle circle;

[0027] Figure 7 It is a cross-sectional view of the engagement between the adjusting rod and the first adjusting sleeve and the second adjusting sleeve of the present invention;

[0028] Figure 8 It is a schematic diagram of a three-dimensional structure in which the first adjustment sleeve, the adjustment rod and the cover plate are connected to each other according to the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides a handheld laser gun head with adjustable light spot, comprising: a gun head body 1, a collimator 2, a collimator base 3, a nozzle 4, a fixing plate 5, a sleeve 6, a stator 7, a rotor 8 and an adjusting rod 9.

[0031] The gun head body 1 is the main part of the laser handheld gun head with adjustable light spot. Obviously, a collimating lens 2, a focusing lens 12 and a protective lens 13 are arranged in the gun head body 1. After the laser beam is collimated by the collimating lens 2, it passes through the wedge-shaped mirror, and then is focused by the focusing lens 12, and then is emitted from the nozzle 4 of the gun head body 1 through the protective lens 13, and then the workpiece is laser welded.

[0032] The collimator 2 is used to collimate the laser beam.

[0033] The collimator lens base 3 is used to install the collimator lens 2. Specifically, a mounting hole can be set on the collimator lens base 3 and the collimator lens 2 can be installed on the collimator lens base 3. In practice, the collimator lens 2 can be detachably installed on the collimator lens base 3, and a through hole is opened on the gun head body 1. The collimator lens base 3 is inserted into the gun head body 1 through the through hole. In this way, the collimator lens 2 can be installed in the gun head body 1. In this way, the collimator lens base 3 can be easily taken out, and then the collimator lens 2 can be replaced.

[0034] Furthermore, bolts are provided, and screw holes 31 are provided at corresponding positions on the side of the collimator base 3 and the gun head body 1 , and then the bolts are screwed into the screw holes 31 , thereby stably installing the collimator base 3 in the gun head body 1 .

[0035] The nozzle 4, after the laser beam is focused, is emitted through the nozzle 4 to process the workpiece. The nozzle 4 can be made of copper material. Specifically, the nozzle 4 is arranged inside the front end of the gun head body 1 and passes through the outside of the gun head body 1. The nozzle 4 can move along the gun head body 1. Through the movement of the nozzle 4, the length of the part of the nozzle 4 extending out of the gun head body 1 can be adjusted, so that it can adapt to different welding conditions.

[0036] The fixing plate 5 and the sleeve 6 are used to fix the nozzle 4. Specifically, the fixing plate 5 is fixed at intervals on the outer periphery of the front end surface of the gun head body 1, and the side of the fixing plate 5 close to the nozzle 4 is in contact with the outer peripheral surface of the nozzle 4. The front end of the side of the fixing plate 5 away from the nozzle 4 has a first inclined surface 51 inclined toward the nozzle 4. The sleeve 6 is sleeved on the outer periphery of the fixing plate 5 and screwed to the fixing plate 5. Specifically, an external thread can be set on the portion of the fixing plate 5 outside the first inclined surface 51, and an internal thread can be set at a corresponding position on the inner wall of the sleeve 6, such as This enables the sleeve 6 to be screwed onto the outer periphery of the fixing plate 5, and at the same time, a second inclined surface 61 matching the first inclined surface 51 is provided on the sleeve 6. When the sleeve 6 is loosened, the nozzle 4 can be moved, so that the length of the portion of the nozzle 4 extending out of the gun head body 1 can be adjusted, and then the sleeve 6 is tightened until the second inclined surface 61 of the sleeve 6 is tightly fitted with the first inclined surface 51. In this way, the fixing plate 5 has a clamping effect on the nozzle 4, thereby achieving fixation of the nozzle 4. In practice, the portion of the fixing plate 5 corresponding to the first inclined surface 51 is made of elastic material.

[0037] The stator 7 and the rotor 8 are obviously components of the motor. The stator 7 and the rotor 8 are both installed in the gun head body 1 and are located in front of the collimator base 3. There is actually a coil. After power is turned on, the rotor 8 can rotate relative to the stator 7. Specifically, the rotor 8 includes an inner rotor 81 and an outer rotor 82. The inner rotor 81 and the outer rotor 82 are both hollow cylindrical, and the outer rotor 82 is sleeved on the outer periphery of the inner rotor 81 and can rotate relative to the inner rotor 81.

[0038] The first wedge-shaped mirror 21 and the second wedge-shaped mirror 22, the wedge-shaped mirror is an optical element whose plane forms a certain angle with another plane. After the light passes through the wedge-shaped mirror, the light beam will be deflected in the thicker direction. In the present application, the first wedge-shaped mirror 21 is installed in the inner rotor 81, and the second wedge-shaped mirror 22 is installed in the outer rotor 82. During use, the outer rotor is adjusted to rotate relative to the inner rotor 81, thereby causing the first wedge-shaped mirror 21 and the second wedge-shaped mirror 22 to rotate relative to each other, thereby causing different angle differences between the first wedge-shaped mirror 21 and the second wedge-shaped mirror 22, thereby changing the refraction angle of the light path, and then the light spot can be moved after being focused by the focusing mirror, thereby changing the light spot size, thereby being able to meet various welding process requirements.

[0039] Specifically, the rotation of the outer rotor 82 relative to the inner rotor 81 can be achieved by the first adjusting sleeve 91, the second adjusting sleeve 92, and the adjusting rod 9. The first adjusting sleeve 91 is installed on the outer periphery of the inner rotor 81, and the second adjusting sleeve 92 is installed on the outer periphery of the outer rotor 82. The outer sides of the ends of the first adjusting sleeve 91 and the second adjusting sleeve 92 are provided with bevel gears 93, and the adjusting rod 9 is installed in the gun head body 1 and is located between the first adjusting sleeve 91 and the second adjusting sleeve 92. The outer periphery of the end of the adjusting rod 9 is respectively engaged with the bevel gears 93 on the first adjusting sleeve 91 and the second adjusting sleeve 92. When the adjusting rod 9 rotates, the first adjusting sleeve 91 and the second adjusting sleeve 92 are driven to rotate relative to each other. For example, the first adjusting sleeve 91 rotates clockwise and the second adjusting sleeve 92 rotates counterclockwise. In this way, the outer rotor 82 can be driven to rotate relative to the inner rotor 81, thereby realizing the relative rotation of the first wedge mirror 21 and the second wedge mirror 22 to change the refraction angle of the light path.

[0040] Furthermore, a plurality of positioning holes 94 are evenly spaced along the circumferential direction on the first adjustment sleeve 91, and a spring 95 is fixed in the positioning hole 94, and a ball 96 is fixed at the end of the spring 95. At the same time, a groove 71 is provided at the corresponding positioning hole 94 on the second adjustment sleeve 92. When the spring 95 is in a natural state, part of the end of the ball 96 is exposed outside the positioning hole 94, and the part can be clamped in the groove 71. When the first adjustment sleeve 91 rotates relative to the second adjustment sleeve 92, the spring 95 is compressed. When the positioning hole is rotated to be opposite to another groove, the spring 95 returns to the natural state, and the ball 96 is clamped in the groove. In this way, the first adjustment sleeve 91 and the second adjustment sleeve 92 are "glued" to each other, thereby achieving the simultaneous and synchronous high-speed rotation of the first wedge-shaped mirror 21 and the second wedge-shaped mirror 22. In practice, positioning holes can be provided on the second adjustment sleeve 92 according to the situation, and corresponding grooves can be provided on the first adjustment sleeve 91.

[0041] A mounting hole 11 is also provided on the inner wall of the gun head body 1, and the adjusting rod 9 is installed in the mounting hole 11. Specifically, the adjusting rod 9 is a T-shaped structure with a large diameter at one end and a small diameter at the other end, and the end with a small diameter of the adjusting rod 9 can move in the mounting hole 11. When the adjusting rod 9 moves to contact the first adjusting sleeve 91 relative to the second adjusting sleeve 92, the end with a small diameter of the adjusting rod 9 meshes with the bevel gear 93, and then the adjusting rod 9 is rotated to realize the rotation of the first adjusting sleeve 91 relative to the second adjusting sleeve 92. Furthermore, a return spring (not shown) is also provided on the outer periphery of the end with a small diameter of the adjusting rod 9, and the adjusting rod 9 is reset under the action of the return spring.

[0042] Furthermore, a positioning groove is also provided at the end of the adjusting rod 9. Specifically, a positioning groove can be opened at the end of the adjusting rod 9 with a larger diameter. The positioning groove can be a regular hexagon. An inner hexagonal wrench is inserted into the positioning groove and the inner hexagonal wrench is rotated to rotate the adjusting rod 9 and then the first adjusting sleeve 91 is rotated relative to the second adjusting sleeve 92. The inner hexagonal wrench is released and the adjusting rod 9 is reset under the action of the return spring.

[0043] The cover plate 16 is arranged on the gun head body 1. Specifically, a slot is provided on the outer wall of the gun head body 1 corresponding to the mounting hole 11, and the cover plate 16 is arranged in the slot. A through hole 17 is provided on the cover plate 16 corresponding to the positioning groove. Through the through hole 17, the hexagonal wrench can be inserted into the positioning groove, so as to conveniently rotate the adjusting rod 9.

[0044] It also includes a bearing 14 which is sleeved on the outer periphery of the inner rotor 81 . The inner rotor 81 rotates in the gun head body 1 via the bearing 14 . It also includes a bearing seat 15 which is sleeved on the outer periphery of the inner rotor 81 . The bearing 14 is installed on the bearing seat 15 .

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser handheld gun head with adjustable light spot, comprising: The gun head body (1) and the collimator lens (2) are characterized in that: they also include a collimator lens base (3), the collimator lens (2) is mounted on the collimator lens base (3), the gun head body (1) is provided with a through hole, and the collimator lens base (3) is inserted into the gun head body (1) through the through hole; The invention also comprises a stator (7), a rotor (8), a first wedge-shaped mirror (21) and a second wedge-shaped mirror (22); the stator (7) and the rotor (8) are both located in the gun head body (1) and in front of the collimator base (3); the rotor (8) can rotate relative to the stator (7); the rotor (8) comprises an inner rotor (81) and an outer rotor (82); the first wedge-shaped mirror (21) is installed in the inner rotor (81); the second wedge-shaped mirror (22) is installed in the outer rotor (82); the outer rotor (82) is sleeved on the outer periphery of the inner rotor (81) and can rotate relative to the inner rotor (81); It also includes a first adjustment sleeve (91), a second adjustment sleeve (92), and an adjustment rod (9), wherein the first adjustment sleeve (91) is mounted on the outer periphery of the inner rotor (81), and the second adjustment sleeve (92) is mounted on the outer periphery of the outer rotor (82), and the ends of the first adjustment sleeve (91) and the second adjustment sleeve (92) are both provided with a bevel gear (93), and the adjustment rod (9) is mounted in the gun head body (1) and is located between the first adjustment sleeve (91) and the second adjustment sleeve (92), and the two sides of the adjustment rod (9) are respectively meshed with the bevel gears (93), and the rotation of the adjustment rod (9) drives the outer rotor (82) to rotate relative to the inner rotor (81); The first adjustment sleeve (91) is provided with a plurality of positioning holes (94) along the circumferential direction, a spring (95) is fixed in each positioning hole (94), a ball (96) is fixed at the end of the spring (95), and a groove is provided on the second adjustment sleeve (92) corresponding to the positioning hole (94), and the end of the ball (96) can be clamped in the groove; The inner wall of the gun head body (1) is provided with a mounting hole (11), the adjusting rod (9) is located in the mounting hole (11) and can move along the mounting hole (11), and a return spring is sleeved on the outer periphery of the adjusting rod (9).

2. The spot adjustable laser handheld gun head according to claim 1, characterized in that: It also includes bolts. Screw holes (31) are provided at corresponding positions on the side of the collimator base (3) and the gun head body (1). The bolts are screwed into the screw holes to fix the collimator base (3) in the gun head body (1).

3. The spot adjustable laser handheld gun head according to claim 1, characterized in that: It also includes a nozzle (4), which is arranged inside the front end of the gun head body (1) and passes through the outside of the gun head body (1), and the nozzle (4) can move along the gun head body (1).

4. The spot adjustable laser handheld gun head as claimed in claim 3, characterized in that: It also includes a fixing plate (5) and a sleeve (6), wherein the fixing plate (5) is fixed at intervals on the outer periphery of the front end surface of the gun head body (1), the side of the fixing plate (5) close to the nozzle (4) is in contact with the nozzle (4), and the front end of the side of the fixing plate (5) away from the nozzle (4) has a first inclined surface (51) inclined toward the nozzle (4), the sleeve (6) is sleeved on the outer periphery of the fixing plate (5) and is screwed to the fixing plate (5), and a second inclined surface (61) matching with the first inclined surface is provided on the sleeve (6) at a position corresponding to the first inclined surface.

5. The spot adjustable laser handheld gun head as claimed in claim 4, characterized in that: The portion of the fixing plate (5) corresponding to the first inclined surface (51) is made of elastic material.

6. The spot adjustable laser handheld gun head according to claim 1, characterized in that: The end of the adjusting rod (9) is also provided with a positioning groove.

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