CN204381941U - Gantry screw body - Google Patents

Abstract

The utility model discloses a gantry screw mechanism, which comprises two gantry screw supports and a gantry screw rotatably installed on the screw supports, and one end of the gantry screw is arranged to drive the gantry screw Rotating screw motor, a screw bracket for supporting the gantry screw is arranged under the gantry screw and between the two screw supports. This solution provides a gantry screw mechanism. By setting the screw bracket under the gantry screw, the reliable support for the gantry screw can be realized, which can effectively avoid the abnormal fall of the middle part of the gantry screw and improve the machining accuracy of the machine tool equipment.

Description

Gantry screw mechanism

technical field

The utility model relates to the technical field of machine tool screw rods, in particular to a gantry screw rod mechanism.

Background technique

Machine tool equipment is a commonly used tool in engineering processing. Machine tool equipment can realize complex processing actions according to different products and objects. Among them, linear feed action is the most basic processing action. Linear feed can be realized by pneumatic piston cylinder or hydraulic piston cylinder, and can also be realized by motor drive. However, when the linear feed stroke is large, the pistons of the pneumatic piston cylinder and the hydraulic piston cylinder are very long, requiring a large installation space, which is not conducive to the process layout. Therefore, the current motor and screw drive mechanism is a common way to achieve linear feed. In this type of machine tool equipment, the screw rod is an indispensable transmission component of the machine tool equipment. The screw rod can convert the rotational power of the motor into linear power direction. External output, so that the output device can achieve linear motion. However, a longer screw rod may have a hidden danger of falling in the middle, and requires very high rigidity and straightness of the screw rod, which makes the production of the screw rod very difficult. Based on the above situation, it is necessary for us to design a screw mechanism with high straightness.

Utility model content

One purpose of this utility model is to provide a gantry screw mechanism, by setting the screw bracket under the gantry screw, it can realize reliable support for the gantry screw, effectively avoid the abnormal fall of the middle part of the gantry screw, and improve the machine tool equipment. machining accuracy.

For this purpose, the utility model adopts the following technical solutions:

A gantry screw mechanism, comprising two screw supports and a gantry screw rotatably mounted on the screw supports, one end of the gantry screw is provided with a wire that drives the rotation of the gantry screw Rod motor, a screw bracket for supporting the gantry screw is arranged under the gantry screw and between the two screw supports.

Specifically, by arranging the screw bracket under the gantry screw, reliable support for the gantry screw can be achieved, which can effectively prevent the middle part of the gantry screw from falling abnormally, and improve the machining accuracy of machine tools.

As a preferred technical solution, a screw nut that can move along the axial direction of the gantry screw is threaded on the gantry screw, and the screw bracket includes first brackets that are oppositely arranged and interlinked. A bracket and a second bracket, the first bracket and the second bracket are respectively located on both sides of the screw nut.

Specifically, when the first bracket and the second bracket are pressed by the screw nut, they can follow the screw nut to move, and during the whole movement process, the first bracket And the second bracket keeps supporting the gantry screw.

As a preferred technical solution, a linear guide rail is arranged under the gantry screw rod, and the linear guide rail is arranged parallel to the gantry screw rod, and both the first bracket and the second bracket are connected to the Linear guide sliding connection.

Preferably, the linear guide rail is located directly below the gantry screw.

Preferably, the length of the linear guide rail is not less than the distance between two screw supports.

As a preferred technical solution, the first bracket and the second bracket are respectively installed on the linear guide rail through bracket sliders, and the bracket slider is slidably connected to the linear guide rail.

As a preferred technical solution, a first adjusting spacer that can adjust the height of the first bracket is arranged between the first bracket and the slider of the bracket; A second adjusting shim that can adjust the height of the second bracket is arranged between the bracket sliders.

Preferably, the first adjusting shim and the second adjusting shim can individually adjust the heights of the first bracket and the second bracket, so that the first bracket and the second bracket The second bracket provides reliable support for the gantry screw rod, prevents the middle part of the gantry screw rod from falling, and ensures the straightness of the gantry screw rod.

As a preferred technical solution, the first bracket is sleeved on the gantry screw, and a self-lubricating first sliding sleeve is embedded between the first bracket and the gantry screw; The second bracket is sheathed on the gantry screw, and a self-lubricating second sliding sleeve is embedded between the second bracket and the gantry screw.

Specifically, by setting the first sliding sleeve and the second sliding sleeve, the first bracket and the second bracket can slide on the gantry screw to avoid contact with the screw. Nut interference.

As a preferred technical solution, the end of the first bracket close to the screw nut is provided with a first limit block that selectively abuts against the screw nut; the second bracket is close to the One end of the screw nut is provided with a second limit block selectively abutting against the screw nut.

Specifically, by arranging the first limit block and the second limit block, the screw nut is prevented from directly abutting against the first limit block or the second limit block to cause damage.

As a preferred technical solution, the opposite ends of the two threaded rod supports are respectively provided with support limit blocks selectively abutting against the first bracket or the second bracket.

Specifically, by setting the support limit block, it is avoided that the first bracket and the second bracket are directly abutted against the screw support to cause damage.

As a preferred technical solution, the distance between the first bracket and the second bracket is equal to half of the distance between the two screw supports.

Specifically, when the first bracket moves to the side close to the screw support, the second bracket moves to the middle of the gantry screw to effectively support the gantry screw; When the second bracket moves to the side close to the screw support, the first bracket moves to the middle of the gantry screw to effectively support the gantry screw.

As a preferred technical solution, the first bracket is fixedly connected to the second bracket through a bracket connecting rod.

Preferably, the first bracket and the second bracket are connected by two bracket connecting rods, and the bracket connecting rods are respectively located on both sides of the gantry screw rod.

The beneficial effect of the utility model is: to provide a gantry screw mechanism, by setting the screw bracket under the gantry screw, the reliable support for the gantry screw can be realized, the middle part of the gantry screw can be effectively prevented from falling abnormally, and the machine tool equipment can be improved. machining accuracy.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

Fig. 1 is the structural representation of the gantry screw mechanism described in the embodiment;

Fig. 2 is the schematic structural view of the assembly of the gantry screw and the screw bracket described in the embodiment;

FIG. 3 is a partially enlarged view of position A shown in FIG. 1 .

In Figure 1 to Figure 3:

1. Screw support; 2. Screw motor; 3. Gantry screw; 4. Screw nut; 5. Screw bracket; 51. First bracket; 52. Second bracket; 53. Bracket Connecting rod; 6. Linear guide rail; 7. Bracket slider; 8. The first adjusting gasket; 9. The second adjusting gasket; 10. The first sliding sleeve; 11. The second sliding sleeve; 12. The first limiting Bit block; 13, the second limit block; 14, the support limit block.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

As shown in Figures 1 to 3, in this embodiment, a gantry screw 3 mechanism includes two screw supports 1 and a gantry screw 3 rotatably installed on the screw supports 1, the gantry screw One end of the rod 3 is provided with a screw motor 2 that drives the gantry screw 3 to rotate, and a screw bracket 5 for supporting the gantry screw 3 is arranged below the gantry screw 3 and between two screw supports 1 . By arranging the screw bracket 5 under the gantry screw 3, the reliable support to the gantry screw 3 is realized, the middle part of the gantry screw 3 is effectively prevented from falling abnormally, and the machining accuracy of the machine tool is improved.

The screw nut 4 that can move along the axial direction of the gantry screw 3 is threaded on the gantry screw 3, and the screw bracket 5 includes a first bracket 51 and a second bracket 52 that are oppositely arranged and interlocked with each other. A bracket 51 and a second bracket 52 are respectively located on two sides of the screw nut 4 , and the first bracket 51 and the second bracket 52 are fixedly connected by two bracket connecting rods 53 . The first bracket 51 is sleeved on the gantry screw 3, and a self-lubricating first sliding sleeve 10 is embedded between the first bracket 51 and the gantry screw 3; the second bracket 52 is sleeved on the gantry screw 3 Above, a self-lubricating second sliding sleeve 11 is embedded between the second bracket 52 and the gantry screw 3 . By setting the first sliding sleeve 10 and the second sliding sleeve 11 , the first bracket 51 and the second bracket 52 can slide on the gantry screw 3 to avoid interference with the screw nut 4 . When the first bracket 51 and the second bracket 52 are subjected to the extrusion force of the screw nut 4, they follow the screw nut 4 to move, and during the whole moving process, the first bracket 51 and the second bracket 52 remain aligned. The support of the gantry screw rod 3.

The distance between the first bracket 51 and the second bracket 52 is equal to half of the distance between the two screw supports 1 . When the first bracket 51 moved to the side near the screw support 1, the second bracket 52 moved to the middle of the gantry screw 3 to effectively support the gantry screw 3; When the screw support 1 is on one side, the first bracket 51 moves to the middle of the gantry screw 3 to effectively support the gantry screw 3 .

One end of the first bracket 51 close to the screw nut 4 is provided with a first stopper 12 selectively abutting against the screw nut 4 , and the end of the second bracket 52 close to the screw nut 4 is provided with a selectively contacting screw nut 4 . The second limit block 13 abutted by the nut 4 prevents the screw nut 4 from directly abutting against the first limit block 12 or the second limit block 13 to cause damage. The opposite ends of the two screw supports 1 are respectively provided with support limit blocks 14 selectively abutted against the first bracket 51 or the second bracket 52, so as to avoid contact between the first bracket 51 and the second bracket 52. The direct abutment of screw support 1 causes damage.

Just below the gantry screw mandrel 3 is provided with a linear guide rail 6, the linear guide rail 6 is arranged parallel to the gantry screw mandrel 3, the length of the linear guide rail 6 is greater than the distance between the two screw mandrel supports 1, the first bracket 51 and the second The brackets 52 are all slidably connected with the linear guide rail 6 . In other embodiments, the length of the linear guide rail 6 is equal to the distance between two screw supports 1 .

The first bracket 51 and the second bracket 52 are respectively installed on the linear guide rail 6 through the bracket slider 7 , and the bracket slider 7 is slidably connected with the linear guide rail 6 . A first adjusting spacer 8 that can adjust the height of the first bracket 51 is arranged between the first bracket 51 and the bracket slider 7, and an adjustable second adjustment gasket 8 is arranged between the second bracket 52 and the bracket slider 7. The second adjustment spacer 9 of the bracket 52 height. Specifically, the first adjusting shim 8 and the second adjusting shim 9 can adjust the heights of the first bracket 51 and the second bracket 52 independently, so that the first bracket 51 and the second bracket 52 are The gantry screw rod 3 provides reliable support to prevent the middle part of the gantry screw rod 3 from falling and ensure the straightness of the gantry screw rod 3 .

The "first" and "second" in this article are only for distinguishing in description, and have no special meaning.

It should be stated that the above-mentioned specific implementation methods are only preferred embodiments of the present utility model and the applied technical principles. Within the technical scope disclosed in the present utility model, any changes or changes that are easily conceivable by those skilled in the art Replacement should be covered within the protection scope of the present utility model.

Claims (10)

1. gantry screw body, it is characterized in that, comprise two screw mandrel bearings and be installed in rotation on gantry screw mandrel on described screw mandrel bearing, one end of described gantry screw mandrel is provided with the lead screw motor driving described gantry screw mandrel to rotate, the below of described gantry screw mandrel the holder for screw rod be provided with between two described screw mandrel bearings for supporting described gantry screw mandrel.

2. gantry according to claim 1 screw body, it is characterized in that, on the screw mandrel of described gantry, be connected with can along the feed screw nut of the axis direction movement of described gantry screw mandrel for screw thread, described holder for screw rod comprises and being oppositely arranged and the first bracket of mutually interlock and the second bracket, and described first bracket and described second bracket lay respectively at the both sides of described feed screw nut.

3. gantry according to claim 2 screw body, it is characterized in that, the below of described gantry screw mandrel is provided with linear guides, and described linear guides and described gantry screw mandrel be arranged in parallel, and described first bracket and described second bracket are all slidably connected with described linear guides.

4. gantry according to claim 3 screw body, is characterized in that, described first bracket and described second bracket are arranged on described linear guides respectively by bracket slide block, and described bracket slide block and described linear guides are slidably connected.

5. gantry according to claim 4 screw body, is characterized in that, be provided with adjustable described first bracket height between described first bracket and described bracket slide block first adjusts pad; Be provided with adjustable described second bracket height between described second bracket and described bracket slide block second adjusts pad.

6. gantry according to claim 5 screw body, is characterized in that, described first bracket is set on the screw mandrel of described gantry, and being embedded with between described first bracket and described gantry screw mandrel can the first sliding sleeve of self-lubricating; Described second bracket is set on the screw mandrel of described gantry, and being embedded with between described second bracket and described gantry screw mandrel can the second sliding sleeve of self-lubricating.

7. gantry according to claim 6 screw body, is characterized in that, described first bracket is provided with the first limited block that selective and described feed screw nut abuts near one end of described feed screw nut; Described second bracket is provided with the second limited block that selective and described feed screw nut abuts near one end of described feed screw nut.

8. gantry according to claim 7 screw body, is characterized in that, one end that two described screw mandrel bearings are relative is respectively arranged with the bearing limited block that selective and described first bracket or described second bracket abut.

9. gantry screw body according to any one of claim 2 to 8, is characterized in that, the distance of described first bracket and described second bracket equals the half of the spacing of two described screw mandrel bearings.

10. gantry screw body according to any one of claim 2 to 8, is characterized in that, described first bracket is fixedly connected with by bracket connecting rod with described second bracket.