CN212194251U - Feeding device of laser 3D printing equipment - Google Patents

Abstract

The utility model discloses a feeding device of laser 3D printing equipment, a cylinder end cover is arranged at the bottom end of a cylinder body, a space for a Z-axis driving mechanism to pass is arranged on the cylinder end cover, the Z-axis driving mechanism is fixed on the cylinder end cover and extends into the cylinder body from the space reserved by the cylinder end cover; the chassis is vertically connected with the end part of the Z-axis driving mechanism extending into the cylinder body; the Z-axis driving mechanism comprises a Z-axis servo motor, a motor mounting seat, side plates, a bottom plate, a polished rod, a lead screw shaft, a lead screw nut, a polished rod bottom fixing plate, a first synchronizing mechanism and a second synchronizing mechanism, wherein the polished rod and two ends of the lead screw shaft are respectively connected with the bottom plate and the polished rod bottom fixing plate, the polished rod penetrates through a double-lining type linear bearing arranged in a linear bearing fixing seat between the bottom plate and a cylinder body end cover, and the second synchronizing mechanism on the Z-axis servo motor shaft side keeps a synchronous transmission relation with the lead screw nut arranged on the lead screw shaft through the first synchronizing mechanism. The design can simplify the structure of the device, improve the compactness of the device and reduce the friction loss.

Description

Feeding device of laser 3D printing equipment

Technical Field

The utility model relates to a 3D printer subassembly, especially a feeding device of laser 3D printing apparatus.

Background

For the manufacture of structural products, the 3D printing device has the characteristics of rapid forming, high manufacturing precision, lower cost of raw materials and the like. The manufacturing of the product is realized by using powdery raw materials and by a layer-by-layer printing mode. Depending on the kind of material and its use, there have been developed and used 3D printing apparatuses of a subdivided type such as fused deposition modeling, laser stereolithography, and selective laser sintering. Among them, 3D printing devices implemented using selective laser sintering are common.

Common types include 3D printing devices employing SLS selective laser sintering and SLM selective laser melting, both of which belong to 3D printing technologies using laser as energy medium. In the two types, compared with SLS selective laser sintering, SLM completely melts powder by laser in the additive manufacturing process, and does not need a bonding agent, and the forming precision and mechanical property are better than those of SLS, so that the SLM selective laser sintering has a better application prospect in certain fields, such as medical treatment, automobile, aerospace and other fields, compared with the SLS selective laser sintering. Taking the dental field as an example, the laser frequency of the SLM type 3D printer mainly at the implementation stage is between 200w and 500w, and the process layer thickness of the powder is mostly between 0.02mm and 0.05mm according to the actual laser spot energy and the melting temperature of the corresponding powder layer during working.

Due to the fact that feeding and layer-by-layer forming are needed in the printing process, the chassis in the corresponding cylinder body needs to be driven by the driving device. A common driving device structure adopts a lead screw transmission mode, generally, a lead screw is adopted to rotate, a lead screw nut is driven to translate, and then a guide rail and a sliding block are matched to drive a chassis on a vertical shaft. For example, CN110722790A discloses a 3D additive motion system and a driving structure used in the method thereof.

The position of the screw shaft of the driving structure is fixed, that is, a large installation space needs to be reserved for the screw shaft and the equipment connected with the screw shaft during design and installation, so that the whole structure of the device is loose, and the space utilization rate is low. Meanwhile, the chassis can only be driven by the side edge which is arranged side by side with the screw shaft (but not directly from the axial direction), so that the screw shaft is required to penetrate through the whole moving space of the chassis, the chassis and the screw shaft are arranged side by side, and the matched sliding block and the guide rail are required to be configured to realize the fixation of the transmission and the direction, the structure is complex, and the friction loss is large. In addition, the precision of transmission by the rotation of the screw shaft is not high, the thickness of the powder layer is greatly influenced, and the requirement of high-precision printing is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: to the problems, a feeding device of a laser 3D printing device is provided. The chassis is directly driven from the axial direction, the device compactness is improved, the device structure is simplified, the friction loss is reduced, and the device control precision is improved.

The utility model adopts the technical scheme as follows:

a feeding device of laser 3D printing equipment comprises a cylinder body, a cylinder body end cover, a chassis and a Z-axis driving mechanism; the cylinder end cover is arranged at the bottom end of the cylinder body, a space for the Z-axis driving mechanism to penetrate through is arranged on the cylinder end cover, and the Z-axis driving mechanism is fixed on the cylinder end cover and extends into the cylinder body from the reserved space of the cylinder end cover; the chassis is vertically connected with the end part of the Z-axis driving mechanism extending into the cylinder body;

the Z-axis driving mechanism comprises a Z-axis servo motor, a motor mounting seat, a side plate, a bottom plate, a polished rod, a lead screw shaft, a lead screw nut, a polished rod bottom fixing plate, a first synchronizing mechanism and a second synchronizing mechanism; the bottom plate is fixed at one end of the side plate, and the other end of the side plate is arranged on one side, far away from the chassis, of the cylinder body end cover; the Z-axis servo motor keeps a relative static relation with the side plate through the motor mounting seat, and the second synchronization mechanism is mounted at the shaft end of the Z-axis servo motor; the screw shaft vertically penetrates through the bottom plate, at least one linear bearing fixing seat is uniformly arranged between the bottom plate and the end cover of the cylinder body around the screw shaft, and each linear bearing fixing seat is parallel to the screw shaft; a double-lining type linear bearing is arranged in the at least one linear bearing fixing seat, and a polished rod penetrates through the at least one double-lining type linear bearing; the bottom plate is provided with a through hole for the smooth rod and the lead screw shaft to pass through; the top parts of the polish rod and the lead screw shaft are both connected with the chassis, and the bottom parts of the polish rod and the lead screw shaft are both connected with a polish rod bottom fixing plate; the screw nut is arranged on the screw shaft, the screw nut is connected with the first synchronizing mechanism and keeps a relative static relation, and the second synchronizing mechanism on the shaft side of the Z-axis servo motor keeps a synchronous transmission relation with the screw nut through the first synchronizing mechanism.

According to the feeding device of the laser 3D printing equipment, the Z-axis servo motor drives the second synchronizing mechanism to move, so that the first synchronizing mechanism is driven to rotate, the first synchronizing mechanism drives the synchronizing mechanism connecting piece to rotate, the screw nut is driven to rotate, the screw shaft is driven to translate, and the chassis is driven to reciprocate along the axial direction. The Z-axis driving mechanism is directly installed in a movement space below the axial direction of the chassis, the effect of direct driving from the axial direction is realized in a nut rotating and screw shaft translating mode, the screw shaft does not need to penetrate through the moving space of the whole chassis, the screw shaft has mobility, a part of space is shared with the chassis, and an independent installation area does not need to be reserved for the driving mechanism, so that device integration installation can be carried out in the moving space of the screw shaft, and the compactness of the device is improved. The driving mechanism directly drives the chassis in the axial direction, a guide rail and a sliding block do not need to be installed, the linear bearing guiding mode is adopted, the structure of the device can be simplified, the friction loss is greatly reduced, and meanwhile, the control precision is improved (the linear bearing is convenient for precise control).

Furthermore, the Z-axis driving mechanism also comprises a synchronous mechanism connecting piece, a thrust ball bearing fixing seat, a linear bearing fixing seat, a thrust ball bearing and a bearing baffle disc; the synchronous mechanism connecting piece is sleeved on the screw shaft and fixedly connected with the screw nut, the thrust ball bearing is arranged on the synchronous mechanism connecting piece, the thrust ball bearing is fixed on the thrust ball bearing fixing seat, and the thrust ball bearing fixing seat and the cylinder body end cover keep a relative static relation; a bearing baffle disc is arranged on the thrust ball bearing fixing seat, the bearing baffle disc is arranged adjacent to the thrust ball bearing, and the bearing baffle disc limits the thrust ball bearing to move relative to the thrust ball bearing fixing seat; the first synchronizing mechanism is fixed on the synchronizing mechanism connecting piece, and the second synchronizing mechanism and the first synchronizing mechanism keep a synchronous transmission relationship.

The structure for realizing the synchronous transmission relationship between the first synchronous mechanism and the lead screw nut can effectively prevent the position between the first synchronous mechanism and the second synchronous mechanism from deviating in the process of translation of the lead screw shaft, namely, the stability of the structure of the driving part is ensured.

Furthermore, a synchronous mechanism locking mechanism is arranged at the position, close to the end part direction and adjacent to the first synchronous mechanism, of the synchronous mechanism connecting piece. This design can prevent effectively that first lazytongs from taking place to become flexible and break away from lazytongs connecting piece because of long-term operation.

Further, the motor mounting seat comprises a transverse plate of the Z-axis motor mounting seat and a vertical plate of the Z-axis motor mounting seat, and the transverse plate of the Z-axis motor mounting seat is perpendicular to the vertical plate of the Z-axis motor mounting seat; the vertical plate of the Z-axis motor mounting seat is vertically arranged on the end cover or the bottom plate of the cylinder body; and the Z-axis servo motor is arranged on a vertical plate of the Z-axis motor mounting seat.

Furthermore, a rod-shaped support is arranged at one end, far away from the vertical plate of the Z-axis motor mounting seat, of the transverse plate of the Z-axis motor mounting seat, and the rod-shaped support is connected to an end cover or a bottom plate of the cylinder body. The design can further improve the stability of the Z-axis servo motor in the operation process.

Furthermore, the first synchronizing mechanism and the second synchronizing mechanism are respectively composed of at least two synchronous pulleys. The design is for load considerations and a conventional synchronous pulley may not meet the load requirements well.

Further, the chassis comprises a chassis body, a wool felt and a sealing ring, the size of the chassis body is matched with the cylinder body, a first groove and a second groove are formed in the side face of the chassis body from top to bottom, the wool felt is arranged in the first groove, and the sealing ring is arranged in the second groove. The wool felt can prevent the powder from falling, avoids the phenomenon of cylinder dragging simultaneously, and the sealing washer plays airtight effect.

Furthermore, a first bearing support, a first bushing, a second bearing support and a second bushing are respectively arranged at two ends of the screw shaft; the first shaft bushing is arranged on the inner ring of the first bearing support, and the inner ring of the first shaft bushing is connected with one end of the screw shaft; the second bearing support is arranged on the outer ring of the second bearing support; the first bearing support is arranged at the center of the fixed plate at the bottom of the polished rod, and the second bearing support is arranged at the center of the chassis.

The design adopts a shaft bushing mode to connect the screw shaft, the support part can be fixed on the chassis firstly, and then the screw shaft is installed. The conventional mode of installing the screw shaft by adopting the bolt needs to directly install the screw shaft on the chassis, and the operation is inconvenient. Compared with the prior art, the design has the characteristics of convenience and rapidness in installation of the screw shaft.

Furthermore, one end of the polished rod is connected with a hot melting nut and is connected to the bottom fixing plate of the polished rod through the hot melting nut; the other end is connected with a polished rod support through a bolt structure.

The polished rod needs to be connected to the bottom of the chassis, and if the polished rod needs to be directly fixed by bolts, the operation is inconvenient. The design adopts a bolt connection mode, and the polished rod can be conveniently and quickly installed only by installing the polished rod support (with smaller volume size).

Further, the top surface of the cylinder body end cover is provided with an anti-collision mechanism. The collision prevention mechanism can avoid or reduce the collision effect between the chassis and the end cover of the cylinder body in the descending process as much as possible, and prevent the chassis and the end cover from being damaged due to collision.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. according to the feeding device of the laser 3D printing equipment, a Z-axis direct driving mode is adopted, the Z-axis driving mechanism can be directly installed in the axial moving area of the chassis, and therefore integrated installation of a large number of devices is achieved, and the compactness of the device is improved. In addition, the design adopts the mode of nut rotation and screw shaft translation to complete the axial drive of the chassis, accessories such as guide rails, sliders and the like do not need to be installed, the structure is simplified, the friction loss is reduced, and the running precision can be greatly improved by adopting the guide of the linear bearing.

2. The feedway of the laser 3D printing apparatus of this design has adopted the chassis structure that the felt combines the sealing washer, can effectively prevent leaking down of powder, avoids the powder to cause wearing and tearing to the cylinder body wall, makes the device have better airtight effect simultaneously.

Drawings

Fig. 1 is an overall configuration diagram of a feeding device of a laser 3D printing apparatus.

Fig. 2 is a sectional view of the cylinder block shown in fig. 1.

Fig. 3 is a structural diagram between a feeding device cylinder end cover and a bottom plate of the laser 3D printing device.

Fig. 4 is a view showing a linear bearing holder and an internal structure thereof.

Fig. 5 is a view showing the structure of the polish rod holder.

Fig. 6 is a block diagram of the bottom dead plate of the polished rod and its mounted components.

Fig. 7 is a structural diagram of the chassis and components connected thereto.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

The embodiment discloses a feeding device of a laser 3D printing device, which comprises a cylinder 101, a cylinder end cover 102, a chassis 103 and a Z-axis driving mechanism, as shown in FIG. 1; the cylinder end cover 102 is arranged at the bottom end of the cylinder 101, a space for allowing the Z-axis driving mechanism to pass through is arranged on the cylinder end cover 102, and the Z-axis driving mechanism is fixed on the cylinder end cover 102 and extends into the cylinder 101 from the space reserved by the cylinder end cover 102; the base plate 103 is vertically connected to the end of the Z-axis drive mechanism that extends into the cylinder 101.

Referring to fig. 2 and 3, the structure of the Z-axis driving mechanism includes: the device comprises a Z-axis servo motor 111, a motor mounting seat, a side plate 104, a bottom plate 107, a polished rod 108, a lead screw shaft 110, a lead screw nut 120, a polished rod bottom fixing plate 109, a first synchronization mechanism and a second synchronization mechanism. The bottom plate 107 is fixed to one end of the side plate 104. May be L-shaped with the side plates 104. The other end of the side plate 104 is mounted to the cylinder end cap 102 on the side remote from the base plate 103. The Z-axis servo motor 111 is kept in a relative static relation with the side plate 104 through a motor mounting seat, and a second synchronization mechanism is mounted at the shaft end of the Z-axis servo motor 111. The threaded shaft 110 vertically penetrates through the bottom plate 107, at least one linear bearing fixing seat 106 is uniformly arranged around the threaded shaft 110 between the bottom plate 107 and the cylinder end cover 102, and each linear bearing fixing seat 106 is parallel to the threaded shaft 110. The at least one linear bearing fixing seat 106 is internally provided with a double-lining type linear bearing 128, and the polished rod 108 is arranged in the at least one double-lining type linear bearing 128 in a penetrating way. The bottom plate 107 is provided with a through hole for the polished rod 108 and the screw shaft 110 to pass through. The top parts of the polish rod 108 and the screw shaft 110 are both connected to the chassis 103, and the bottom parts of the polish rod 108 and the screw shaft 110 are both connected with a polish rod bottom fixing plate 109. The screw nut 120 is disposed on the screw shaft 110, the screw nut 120 is connected to the first synchronizing mechanism and maintains a relatively stationary relationship, and the second synchronizing mechanism on the shaft side of the Z-axis servomotor 111 maintains a synchronous transmission relationship with the screw nut 120 through the first synchronizing mechanism.

Specifically, as shown in fig. 2 and 3, the Z-axis drive mechanism further includes a synchronizing mechanism link 119, a thrust ball bearing holder 105, a linear bearing holder 106, a thrust ball bearing 127, and a bearing catch plate 118. The synchronous mechanism connecting piece 119 is sleeved on the lead screw shaft 110 and fixedly connected with the lead screw nut 120, the thrust ball bearing 127 is arranged on the synchronous mechanism connecting piece 119, the thrust ball bearing 127 is fixed on the thrust ball bearing fixing seat 105, and the thrust ball bearing fixing seat 105 and the cylinder body end cover 102 keep a relative static relationship; a bearing blocking disc 118 is arranged on the thrust ball bearing fixing seat 105, the bearing blocking disc 118 is arranged adjacent to the thrust ball bearing 127, and the bearing blocking disc 118 limits the thrust ball bearing 127 to move relative to the thrust ball bearing fixing seat 105; the first synchronization mechanism is fixed to the synchronization mechanism link 119. The second synchronization mechanism is in synchronous driving relationship with the first synchronization mechanism and, thus, with the lead screw nut 120. Further, a synchronizing mechanism locking mechanism is provided at a position adjacent to the first synchronizing mechanism in the end portion direction of the synchronizing mechanism link 119 to fix the position of the first synchronizing mechanism.

As shown in fig. 3, in one embodiment, the first and second synchronizing mechanisms are synchronous pulley sets, each synchronous pulley set includes a plurality of synchronous pulleys, and the synchronous pulley sets are maintained in a synchronous transmission relationship by a synchronous belt 116 (or a synchronous rack). Of course, the two synchronous mechanisms can also adopt a gear transmission mode to maintain synchronous transmission relationship.

In order to reduce the impact on the cylinder head 102 when the chassis 103 descends as much as possible, as shown in fig. 1, a collision prevention mechanism is provided on the top surface of the cylinder head 102. Such as the crash post 1021, is preferably made of an elastic material such as rubber.

Example two

The embodiment discloses a structure of a motor mounting seat. The motor mounting seat comprises a Z-axis motor mounting seat transverse plate 112 and a Z-axis motor mounting seat vertical plate 113, and the Z-axis motor mounting seat transverse plate 112 is vertical to the Z-axis motor mounting seat vertical plate 113; a vertical plate 113 of a Z-axis motor mounting seat is vertically arranged on a cylinder end cover 102 or a bottom plate 107; the Z-axis servomotor 111 is mounted on a Z-axis motor mount riser 113.

Further, in order to improve the operation stability of the Z-axis servomotor 111, the motor mounting base further includes a cylindrical support 129 (or other rod shape), and the cylindrical support 129 is disposed at an end of the Z-axis motor mounting base transverse plate 112 away from the Z-axis motor mounting base vertical plate 113 and connected to the cylinder end cover 102 or the bottom plate 107. So as to further fix the Z-axis motor mounting base transverse plate 112 and improve the stability of the Z-axis motor mounting base transverse plate. The cylindrical support 129 is provided in a rod shape so as not to affect the structural relationship between the first synchronizing mechanism and the second synchronizing mechanism.

EXAMPLE III

The present embodiment discloses a structure of a Z-axis drive mechanism. The Z-axis driving mechanism comprises a side plate 104, a bottom plate 107, a thrust ball bearing fixing seat 105, a linear bearing fixing seat 106, a polished rod 108, a threaded rod shaft 110, a threaded rod nut 120, a polished rod bottom fixing plate 109, a Z-axis servo motor 111, a Z-axis motor mounting seat transverse plate 112, a Z-axis motor mounting seat vertical plate 113, a first synchronous belt wheel set, a second synchronous belt wheel set, a synchronous belt 116 and a synchronous mechanism connecting piece 119. The first synchronous pulley set and the second synchronous pulley set respectively comprise at least one synchronous pulley.

As shown in fig. 2 and 3, the bottom plate 107 is fixed to one end of the side plate 104, and is L-shaped with the side plate 104, and the other end of the side plate 104 is used for being mounted on the side of the cylinder head cover 102 away from the bottom plate 103. The side plates 104 and the bottom plate 107 may be integrally formed L-shaped members. The thrust ball bearing retainer 105 is held in a relatively stationary relationship with the side plate 104. The screw shaft 110 vertically penetrates the middle of the bottom plate 107, and at least one (e.g., two or three) linear bearing holders 106 are uniformly distributed around the screw shaft 110 and are parallel to the screw shaft 110. Two ends of each linear bearing fixing seat 106 are respectively connected with the bottom plate 107 and the cylinder end cover 102. At least one of the linear bearings 106 has a double-lined linear bearing 128 therein, as shown in fig. 6, and a portion or all of the double-lined linear bearing 128 penetrates the polish rod 108. The bottom plate 107 is provided with a through hole for the polished rod 108 and the screw shaft 110 to pass through. The top of the polish rod 108 and the top of the screw shaft 110 are both used for connecting to the chassis 103, and the bottom of the polish rod 108 and the bottom of the screw shaft 110 are both connected with the polish rod bottom fixing plate 109. The lead screw shaft 110 is provided with a lead screw nut 120, the lead screw nut 120 is fixedly connected with a synchronous mechanism connecting piece 119, the synchronous mechanism connecting piece 119 is provided with a thrust ball bearing 127, the thrust ball bearing 127 is fixed on a thrust ball bearing fixing seat 105, the thrust ball bearing fixing seat 105 is further provided with a bearing blocking disc 118, the bearing blocking disc 118 is arranged adjacent to the thrust ball bearing 127, and the bearing blocking disc 118 limits the thrust ball bearing 127 to move relative to the thrust ball bearing fixing seat 105. The Z-axis motor mounting seat transverse plate 112 is connected with the Z-axis motor mounting seat vertical plate 113 to form an L shape, and the Z-axis motor mounting seat vertical plate 113 is vertically arranged on one side, far away from the chassis 103, of the cylinder body end cover 102. Both can be integrally formed. The Z-axis servo motor 111 is mounted on the Z-axis motor mounting base transverse plate 112. The first synchronous pulley set is fixedly arranged on the synchronous mechanism connecting piece 119, a pulley locking nut 117 is arranged at the position, close to the end part direction and adjacent to the first synchronous pulley set, of the synchronous mechanism connecting piece 119, and the second synchronous pulley set is arranged on a Z-axis servo motor shaft. The first synchronous pulley set is connected with a second synchronous pulley set correspondingly arranged on the shaft side of the Z-axis servo motor through a synchronous belt 116.

In order to improve the operation stability of the Z-axis servo motor 111, as shown in fig. 3, at least one cylindrical support 129 (or other rod shape) is disposed at an end of the Z-axis motor mounting base transverse plate 112 away from the Z-axis motor mounting base vertical plate 113, and the cylindrical support 129 is used for being connected to the cylinder end cover 102 or the bottom plate 107 to further fix the Z-axis motor mounting base transverse plate 112, so as to improve the stability of the Z-axis motor mounting base transverse plate.

Example four

The present embodiment discloses a structure of a Z-axis drive mechanism. As shown in fig. 1 and 2, the Z-axis driving structure includes a side plate 104, a bottom plate 107, a thrust ball bearing fixing base 105, a linear bearing fixing base 106, a polish rod 108, a lead screw shaft 110, a lead screw nut 120, a polish rod bottom fixing plate 109, a Z-axis servo motor 111, a Z-axis motor mounting base transverse plate 112, a Z-axis motor mounting base vertical plate 113, a first synchronous pulley set, a second synchronous pulley set, a synchronous pulley 116, and a synchronous mechanism connecting piece 119. The first synchronous pulley set and the second synchronous pulley set respectively comprise at least one synchronous pulley.

As shown in fig. 2 and 3, the bottom plate 107 is fixed to one end of the side plate 104, and is L-shaped with the side plate 104, and the other end of the side plate 104 is used for being mounted on the side of the cylinder head cover 102 away from the bottom plate 103. The side plates 104 and the bottom plate 107 may be integrally formed L-shaped members. The thrust ball bearing fixing base 105 is fixedly mounted on the inner side of the side plate 104 or the bottom plate 107. The screw shaft 110 vertically penetrates the middle of the bottom plate 107, and at least one (e.g., two or three) linear bearing holders 106 are uniformly distributed around the screw shaft 110 and are parallel to the screw shaft 110. Two ends of each linear bearing fixing seat 106 are respectively connected with the bottom plate 107 and the cylinder end cover 102. At least one linear bearing fixing seat 106 is internally provided with a double-lining type linear bearing 128, and the polished rod 108 is arranged in part or all of the double-lining type linear bearing 128 in a penetrating way. The bottom plate 107 is provided with a through hole for the polished rod 108 and the screw shaft 110 to pass through. The top of the polish rod 108 and the top of the screw shaft 110 are both used for connecting to the chassis 103, and the bottom of the polish rod 108 and the bottom of the screw shaft 110 are both connected with the polish rod bottom fixing plate 109. The screw shaft 110 is provided with a screw nut 120, the screw nut 120 is fixedly connected with a synchronous mechanism connecting piece 119, the synchronous mechanism connecting piece 119 is provided with a thrust ball bearing 127, the thrust ball bearing 127 is fixed on a thrust ball bearing fixing seat 105, and the movement of the thrust ball bearing 127 is limited by an adjacent bearing baffle disc 118. In one embodiment, the thrust ball bearings 103 are designed in two or more in consideration of the load. The first synchronous pulley set is fixedly arranged on the synchronous mechanism connecting piece 119, a pulley locking nut 117 is arranged at the position, close to the end part direction and adjacent to the first synchronous pulley set, of the synchronous mechanism connecting piece 119, and the second synchronous pulley set is arranged on a Z-axis servo motor shaft. The first synchronous pulley set is connected with a second synchronous pulley set correspondingly arranged on the shaft side of the Z-axis servo motor through a synchronous belt 116. In one embodiment, one timing pulley is too thin in view of the load, the first timing pulley set includes two timing pulleys a115 (or more), and correspondingly, the second timing pulley set also includes two timing pulleys B114 (or more), and the two timing pulleys a115 are respectively connected to the two timing pulleys B114 through two timing belts 116. In specific implementation, the first synchronous pulley set welds the two synchronous pulleys a115 into a whole, and the second synchronous pulley set welds the two synchronous pulleys B114 into a whole (or respectively uses synchronous pulleys with almost equal thicknesses after welding for replacement). The Z-axis motor mounting seat transverse plate 112 is connected with the Z-axis motor mounting seat vertical plate 113 to form an L shape, and the Z-axis motor mounting seat vertical plate 113 is vertically arranged on one side, far away from the chassis 103, of the cylinder body end cover 102. Both can be integrally formed. In particular, to improve the mounting stability of the motor, a cylindrical support 129 is provided at the end of the Z-axis motor mounting base transverse plate 112 remote from the Z-axis motor mounting base vertical plate 113, and the cylindrical support 129 is used for connecting to the cylinder end cover 102 or the bottom plate 107 to further fix the Z-axis motor mounting base transverse plate 112. The Z-axis servo motor 111 is mounted on the Z-axis motor mounting base transverse plate 112.

EXAMPLE five

The structure of the screw shaft 110 and the polished rod 108.

As shown in fig. 2 and 6, the two ends of the screw shaft 110 are respectively provided with a first bearing support 122, a first bushing 123, a second bearing support 130 and a second bushing 131. A first bushing 123 is provided at an inner ring of the first bearing holder 122, the first bushing 123 being coupled to an end of the screw shaft 110 at the inner ring; a second bushing 131 is provided at an inner ring of the second bearing holder 130, and the inner ring of the second bushing 131 is coupled to the other end of the screw shaft 110. In the Z-axis drive configuration, the first bearing support 122 is mounted centrally on the polished rod bottom mounting plate 109 and the second bearing support 130 is mounted centrally on the chassis 103.

As shown in fig. 2, 5 and 6, one end of the polish rod 108 is connected with a hot-melting nut 121, and is connected to the polish rod bottom fixing plate 109 through the hot-melting nut 121; the other end is connected with a polish rod support 124 through a bolt structure. Specifically, a small hole is formed in the polish rod 108 close to the end of the polish rod support 124 in the direction perpendicular to the axial direction, a matched through hole 125 is formed in the corresponding position of the polish rod support 124, and a cylindrical pin 126 passes through the through hole 125 in the polish rod support 124 and the small hole in the polish rod 108 in the direction perpendicular to the polish rod 108, so that the polish rod 108 and the polish rod support 124 are quickly connected. In use, the hot-melt nut 121 is fixed to the polish rod bottom fixing plate 109 by penetrating the polish rod bottom fixing plate 109 through bolts and spacers, and for the other end of the polish rod 108, the polish rod holder 124 is first mounted on the chassis 103, and the polish rod 108 is connected to the polish rod holder 124 by the cylindrical pin 126, thereby completing the mounting of the polish rod 108.

EXAMPLE six

The present embodiment discloses the structure of the chassis 103.

As shown in fig. 7, the chassis 103 includes a chassis body 1031, a wool felt 1032 and a sealing ring 1033, the chassis body 1031 is adapted to the cylinder 101 in size, a first groove and a second groove are arranged on the side surface of the chassis body 1031 from top to bottom, the wool felt 1032 is arranged in the first groove, and the sealing ring 1033 is arranged in the second groove.

The fine wool felt of compact type can effectively prevent powder from leaking downwards along the inner wall of the cylinder body 101, the wool felt 1032 is better in compressibility compared with a sealing ring 1033, and the structure of the wool felt contains a large number of compact gaps, so that the cylinder body wall and each chassis cannot be pulled due to overlarge pressure even a small amount of powder falls into the gaps between the wool felt 132 and the cylinder body wall in the up-and-down movement process. The function of the seal 1032 is to provide an airtight seal to the device.

EXAMPLE seven

The embodiment discloses a feeding device of a laser 3D printing device, as shown in fig. 1, comprising a cylinder 101, a cylinder end cover 102, a chassis 103 and a Z-axis driving mechanism; the cylinder end cover 102 is arranged at the bottom end of the cylinder 101, the top surface of the cylinder end cover 102 is provided with an anti-collision column 1021, the cylinder end cover 102 is provided with a space for allowing the Z-axis driving mechanism to pass through, and the Z-axis driving mechanism is fixed on the cylinder end cover 102 and extends into the cylinder 101 from the space reserved by the cylinder end cover 102; the base plate 103 is vertically connected to the end of the Z-axis drive mechanism that extends into the cylinder 101.

As shown in fig. 7, the chassis 103 includes a chassis body 1031, a wool felt 1032 and a sealing ring 1033, the chassis body 1031 is adapted to the cylinder 101 in size, a first groove and a second groove are arranged on the side surface of the chassis body from top to bottom, the wool felt 1032 is arranged in the first groove, and the sealing ring 1033 is arranged in the second groove. The size and the number of the wool felt 1032 and the first grooves are correspondingly matched, and the size and the number of the sealing rings 1033 and the second grooves are correspondingly matched.

The Z-axis driving structure comprises a side plate 104, a thrust ball bearing fixing seat 105, a linear bearing fixing seat 106, a bottom plate 107, a polished rod 108, a polished rod bottom fixing plate 109, a threaded rod shaft 110, a Z-axis servo motor 111, a lead screw nut 120, a synchronizing mechanism connecting piece 119, a Z-axis motor mounting seat transverse plate 112, a first synchronous belt pulley set, a second synchronous belt pulley set, a synchronous belt 116 and a Z-axis motor mounting seat vertical plate 113, wherein the first synchronous belt pulley set and the second synchronous belt pulley set respectively comprise at least one synchronous belt pulley.

As shown in fig. 1, 2 and 3, one end of the side plate 104 is used for being mounted on the side of the cylinder end cover 102 far away from the bottom plate 103, and the bottom plate 107 is fixed at the other end of the side plate 104 and forms an L shape with the side plate 104. Both can be integrally formed. The thrust ball bearing fixing base 105 is fixedly installed inside the side plate 104. The threaded shaft 110 vertically penetrates through the middle of the bottom plate 107, the linear bearing fixing seats 106 are located between the cylinder end cover 102 and the bottom plate 107, the number of the linear bearing fixing seats is three, the linear bearing fixing seats are uniformly distributed on the outer side of the threaded shaft 110, a double-lining type linear bearing 128 is arranged inside each linear bearing fixing seat 106, and the polished rod 108 penetrates through the three double-lining type linear bearings 128 which are uniformly distributed, as shown in fig. 4. The bottom plate 107 and the cylinder end cover 102 are provided with through holes for the smooth rod 108 and the threaded shaft 110 to pass through. The top of the polish rod 108 and the top of the screw shaft 110 are both connected to the chassis body 1031, and the bottom of the polish rod 108 and the bottom of the screw shaft 110 are both connected to the polish rod bottom fixing plate 109. The screw shaft 110 is provided with a screw nut 120, the screw nut 120 is fixedly connected with a synchronous mechanism connecting piece 119, and the synchronous mechanism connecting piece 119 is provided with a thrust ball bearing 127. The thrust ball bearing 127 is fixed on the thrust ball bearing fixing seat 105, and the downward movement of the thrust ball bearing 127 is limited by the adjacent bearing stop disk 118. In one embodiment, the thrust ball bearings 103 are designed in two or more in consideration of the load. The first synchronous pulley set is fixedly arranged on the synchronous mechanism connecting piece 119, and a pulley locking nut 117 is arranged at the position, close to the end part direction and adjacent to the first synchronous pulley set, of the synchronous mechanism connecting piece 119 so as to fix the position of the first pulley set; the second synchronous pulley set is arranged on a shaft of the Z-axis servo motor, and the first synchronous pulley set is connected with the second synchronous pulley set correspondingly arranged on the shaft side of the Z-axis servo motor through a synchronous belt 116. The first synchronous pulley set comprises two synchronous pulleys a115 (or more), correspondingly, the second synchronous pulley set also comprises two synchronous pulleys B114 (or more), and the two synchronous pulleys a115 are respectively connected with the two synchronous pulleys B114 through two synchronous belts 116 (the number of which is matched with that of the synchronous pulleys). In specific implementation, the first synchronous pulley set welds the two synchronous pulleys a115 into a whole, and the second synchronous pulley set welds the two synchronous pulleys B114 into a whole (or respectively selects synchronous pulleys with almost equal thicknesses after welding for replacement). The Z-axis motor mounting seat transverse plate 112 is connected with the Z-axis motor mounting seat vertical plate 113 to form an L shape, and the Z-axis motor mounting seat vertical plate 113 is vertically arranged on one side, far away from the chassis 103, of the cylinder body end cover 102. In particular, to improve the mounting stability of the motor, a cylindrical support 129 is provided at the end of the Z-axis motor mounting cross plate 112 remote from the Z-axis motor mounting riser 113 toward the cylinder head cover 102, the cylindrical support 129 being adapted to be coupled to the cylinder head cover to couple the Z-axis motor mounting cross plate 112 to the cylinder head cover 102. The Z-axis servo motor 111 is mounted on the Z-axis motor mounting base transverse plate 112.

Further, as shown in fig. 2 and 6, a first bearing support 122, a first bushing 123, a second bearing support 130, and a second bushing 131 are respectively provided at both ends of the screw shaft 110. A circular hole is formed in the center of the polished rod bottom fixing plate 109, the outer ring of the first bearing support 122 is fitted into the circular hole and is mounted in the circular hole, a first bushing 123 is disposed on the inner ring of the first bearing support 122, and the inner ring of the first bushing 123 is connected to one end of the threaded shaft 110. The second bearing support is arranged in the middle of the chassis body 1031, a second bushing 131 is arranged on the inner ring of the second bearing support, and the inner ring of the second bushing 131 is connected with the other end of the screw shaft 110.

For the installation of the polish rod 108, as shown in fig. 6, three mounting holes are uniformly distributed outside the central circular hole of the polish rod bottom fixing plate 109 for respectively fixing one end of the polish rod 108. The polish rod 108 is provided with a heat-fusible nut 121 at its end, and the heat-fusible nut 121 is fixed to the polish rod bottom fixing plate 109 by means of screws and washers. The other end of the polished rod 108 is for connection to the chassis body 1031. In one embodiment, as shown in fig. 2 and 5, the polish rod 108 is provided with a polish rod support 124 at the end close to the bottom plate 103, a through hole perpendicular to the axial direction is formed at the side of the polish rod 108 close to the polish rod support 124, a matching through hole is formed in the polish rod support 124, each polish rod support 124 is provided with a cylindrical pin 126, and the cylindrical pin 126 penetrates through the polish rod support 124 and the through hole in the polish rod 108 in the direction perpendicular to the polish rod 108. In application, the polish rod holder 124 is first installed on the chassis body 1031, and if the bolt is used for axial fixing, the polish rod 108 is not convenient to install, so that the polish rod 108 is connected to the chassis body 1031 by using a bolt perpendicular to the axial direction, and convenient and quick installation can be realized.

Although only a partial number of linear bearing holders 106, double-lined linear bearings 128, and polished rods 108 are illustrated herein, in actual production, other numbers of components are used, for example, two linear bearings are used, and the case where the double-lined linear bearings 128 are not provided in the partial linear bearing holders 106, and the case where the polished rods 108 are not provided in the partial double-lined linear bearings 128, are all considered as not departing from the concept of the present design.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The feeding device of the laser 3D printing equipment is characterized by comprising a cylinder body (101), a cylinder body end cover (102), a chassis (103) and a Z-axis driving mechanism; the cylinder end cover (102) is arranged at the bottom end of the cylinder body (101), a space for the Z-axis driving mechanism to penetrate is formed in the cylinder end cover (102), the Z-axis driving mechanism is fixed on the cylinder end cover (102) and extends into the cylinder body (101) from the space reserved in the cylinder end cover (102); the chassis (103) is vertically connected with the end part of the Z-axis driving mechanism extending into the cylinder body (101);

the Z-axis driving mechanism comprises a Z-axis servo motor (111), a motor mounting seat, a side plate (104), a bottom plate (107), a polished rod (108), a lead screw shaft (110), a lead screw nut (120), a polished rod bottom fixing plate (109), a first synchronization mechanism and a second synchronization mechanism; the bottom plate (107) is fixed at one end of the side plate (104), and the other end of the side plate (104) is arranged on one side, far away from the chassis (103), of the cylinder end cover (102); the Z-axis servo motor (111) is kept in a relative static relation with the side plate (104) through a motor mounting seat, and the second synchronization mechanism is mounted at the shaft end of the Z-axis servo motor (111); the screw shaft (110) vertically penetrates through the bottom plate (107), at least one linear bearing fixing seat (106) is uniformly arranged between the bottom plate (107) and the cylinder body end cover (102) around the screw shaft (110), and each linear bearing fixing seat (106) is parallel to the screw shaft (110); a double-lining type linear bearing (128) is arranged in the at least one linear bearing fixing seat (106), and a polished rod (108) penetrates through the at least one double-lining type linear bearing (128); a through hole for the polished rod (108) and the threaded shaft (110) to pass through is formed in the bottom plate (107); the tops of the polish rod (108) and the screw shaft (110) are connected to the chassis (103), and the bottoms of the polish rod (108) and the screw shaft (110) are connected with a polish rod bottom fixing plate (109); the screw nut (120) is arranged on the screw shaft (110), the screw nut (120) is connected with the first synchronous mechanism and keeps a relative static relation, and the second synchronous mechanism on the shaft side of the Z-axis servo motor (111) keeps a synchronous transmission relation with the screw nut (120) through the first synchronous mechanism.

2. The feeding device of the laser 3D printing equipment as claimed in claim 1, wherein the Z-axis driving mechanism further comprises a synchronous mechanism connecting piece (119), a thrust ball bearing fixing seat (105), a linear bearing fixing seat (106), a thrust ball bearing (127) and a bearing blocking disc (118); the synchronous mechanism connecting piece (119) is sleeved on the lead screw shaft (110) and fixedly connected with the lead screw nut (120), the thrust ball bearing (127) is installed on the synchronous mechanism connecting piece (119), the thrust ball bearing (127) is fixed on the thrust ball bearing fixing seat (105), and the thrust ball bearing fixing seat (105) and the cylinder body end cover (102) keep a relative static relation; a bearing blocking disc (118) is arranged on the thrust ball bearing fixing seat (105), the bearing blocking disc (118) is arranged adjacent to the thrust ball bearing (127), and the bearing blocking disc (118) limits the thrust ball bearing (127) to move relative to the thrust ball bearing fixing seat (105); the first synchronizing mechanism is fixed on a synchronizing mechanism connecting piece (119), and the second synchronizing mechanism and the first synchronizing mechanism keep a synchronous transmission relation.

3. The feeder of the laser 3D printing apparatus according to claim 2, characterized in that a synchronization mechanism locking mechanism is provided at a position adjacent to the first synchronization mechanism in the direction of the end of the synchronization mechanism connecting member (119).

4. The feeder of the laser 3D printing apparatus of claim 1, wherein the motor mount includes a Z-axis motor mount cross plate (112) and the Z-axis motor mount riser (113), the Z-axis motor mount cross plate (112) being perpendicular to the Z-axis motor mount riser (113); a vertical plate (113) of a Z-axis motor mounting seat is vertically arranged on a cylinder body end cover (102) or a bottom plate (107); the Z-axis servo motor (111) is arranged on a vertical plate (113) of a Z-axis motor mounting seat.

5. The feeding device of the laser 3D printing equipment as claimed in claim 4, wherein a rod-shaped support is arranged at one end of the Z-axis motor mounting seat transverse plate (112) far away from the Z-axis motor mounting seat vertical plate (113), and the rod-shaped support is connected to the cylinder end cover (102) or the bottom plate (107).

6. The feeding device of the laser 3D printing apparatus according to claim 1, wherein the first and second synchronizing mechanisms are each constituted by at least two synchronizing pulleys.

7. The feeding device of the laser 3D printing equipment according to the claim 1, characterized in that the chassis (103) comprises a chassis body (1031), a wool felt (1032) and a sealing ring (1033), the chassis body (1031) is matched with the cylinder (101) in size, a first groove and a second groove are arranged on the side surface of the chassis body (1031) from top to bottom, the wool felt (1032) is arranged in the first groove, and the sealing ring (1033) is arranged in the second groove.

8. The feeding device of the laser 3D printing apparatus according to claim 1, wherein the two ends of the screw shaft (110) are respectively provided with a first bearing support (122), a first bushing (123), a second bearing support (130) and a second bushing (131); the first bushing (123) is arranged on the inner ring of the first bearing support (122), and the inner ring of the first bushing (123) is connected with one end of the screw shaft (110); the second shaft bushing (131) is arranged on the inner ring of the second bearing support (130), and the inner ring of the second shaft bushing (131) is connected with the other end of the screw shaft (110); the first bearing support (122) is arranged in the center of the polish rod bottom fixing plate (109), and the second bearing support (130) is arranged in the center of the chassis (103).

9. The feeding device of the laser 3D printing device according to claim 1, characterized in that one end of the polish rod (108) is connected with a hot-melt nut (121), and is connected to the polish rod bottom fixing plate (109) through the hot-melt nut (121); the other end is connected with a polish rod support (124) through a bolt structure.

10. The feeding device of the laser 3D printing equipment as claimed in claim 1, characterized in that the top surface of the cylinder end cover (102) is provided with an anti-collision mechanism.

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