Four-guide trolley structure

Abstract

The application discloses a four-guide-rail headstock structure and relates to the technical field of numerical control machine tool machining. The four-guide-rail headstock structure comprises a saddle and a spindle box. The saddle is fixed with a sliding block, the spindle box is fixed with a sliding rail, the sliding block is provided with a folding and unfolding mechanism, the folding and unfolding mechanism comprises a back part and two side parts which are slidingly connected to the sliding block, and the back part is provided with a lubricating assembly. The four-guide-rail headstock structure further comprises a driving assembly which has a first stroke for driving the back part to approach the sliding rail and a second stroke for driving the two side parts to approach each other. The four-guide-rail headstock structure provided by the application drives the back part and the two side parts to move away from each other through the first stroke and the second stroke of the driving assembly, thereby increasing the space for installing the sliding rail and the space for overhauling the lubricating assembly, so that one end of the sliding rail can be placed between the back part and the two side parts at will, and then the back part and the two side parts are driven to approach each other through the driving assembly, thereby forcing the sliding rail to align with the sliding block.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control machine tool processing, and particularly relates to a four-guide-rail crane structure. BACKGROUND

[0002] The cradle five-axis machine is a high-precision numerical control machining equipment, which is widely used in the fields of aerospace, automobile manufacturing, mold processing, etc. Its main feature is that it can perform complex processing in multiple-axis directions, providing high efficiency and high precision processing capability.

[0003] For example, the patent document with the application publication number CN119427014A, the application publication date of February 14, 2025, and the name of "Inverted T-shaped cross slide table vertical five-axis machining center", which includes a base, an X-axis linear guide rail, a saddle, a Y-axis linear guide rail, a rotary table support plate, a five-axis cradle rotary table, a column, a Z-axis linear guide rail, a spindle box, and a vertical tool magazine. Compared with the traditional vertical five-axis machining center, the cross slide table structure can effectively reduce the overhanging of the saddle and the workbench.

[0004] Generally, a plurality of slide blocks and slide rails are arranged on a numerical control machine tool, the slide blocks and the slide rails are closely matched, and a lubricating structure is arranged on the side of the slide block close to the slide rail. Obviously, the overall slide block structure is not only inconvenient for the installation of the slide block and the slide rail, but also inconvenient for the maintenance of the lubricating structure. SUMMARY

[0005] The purpose of the present application is to provide a four-guide-rail crane structure to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A four-guide-rail crane structure, comprising a saddle and a spindle box, the saddle is fixed with a slide block, the spindle box is fixed with a slide rail, the slide block is provided with:

[0008] a folding and unfolding mechanism, comprising a back portion and two side portions slidingly connected to the slide block, the back portion is provided with a lubricating assembly; further comprising a driving assembly, having a first stroke for driving the back portion to approach the slide rail and a second stroke for driving the two side portions to approach each other.

[0009] The four-guide-rail crane structure described above, the saddle is fixed with four slide blocks, and the spindle box is fixed with four slide rails.

[0010] The four-guide-rail crane structure described above, the slide block is constructed with a first sliding groove and two second sliding grooves, the back portion is slidingly connected in the first sliding groove, and the two side portions are respectively slidingly connected in the two second sliding grooves.

[0011] The four-guide rail trolley structure has the drive assembly comprising a drive frame connected with the sliding block, the drive frame is provided with an inclined plate, the inclined plate is provided with a first inclined groove, the back part is provided with a first connecting column, and the first connecting column is connected in the first inclined groove.

[0012] The four-guide rail trolley structure has the drive assembly further comprising a connecting block provided on the back part, the connecting block is provided with a second inclined groove, the side part is provided with a second connecting column, and the second connecting column is connected in the second inclined groove.

[0013] The four-guide rail trolley structure has the drive frame having a first position and a second position, in the first position, the back part and the two side parts are separated from each other, and in the second position, the back part and the two side parts are attached to each other.

[0014] The four-guide rail trolley structure has the lubricating assembly comprising a movable groove provided on the back part, the back part is provided with a through hole communicated with the movable groove, the sliding rail is provided with an oil storage channel, the movable groove is provided with a branch pipe communicated with the oil storage channel, the branch pipe is slidably sleeved with a movable pipe, and the movable pipe is provided with a ball at an end away from the branch pipe.

[0015] The four-guide rail trolley structure has the movable pipe provided with an opening at an end away from the branch pipe, and the movable pipe is provided with a first elastic member for forcing the ball to block the opening.

[0016] The four-guide rail trolley structure has the back part inserted with a trigger rod, the trigger rod extends into the movable groove and is fixed with the movable pipe, and the movable groove is provided with a second elastic member for forcing the movable pipe into the movable groove.

[0017] The four-guide rail trolley structure has one end of the trigger rod provided with a wedge surface exposed from the back part, the drive frame is provided with a vertical groove communicated with the first inclined groove, and the drive frame further has a third position, in which the first connecting column is located in the vertical groove, so that the inclined plate abuts against the wedge surface and forces the movable pipe to attach to the through hole.

[0018] In the technical scheme, the four-guide rail trolley structure is provided with the drive assembly, the first stroke and the second stroke of the drive assembly drive the back part and the two side parts to be separated from each other, thereby increasing the space for installing the sliding rail and the space for overhauling the lubricating assembly, so that one end of the sliding rail can be placed between the back part and the two side parts at will, and then the back part and the two side parts are driven by the drive assembly to be close to each other, so as to force the sliding rail to be aligned with the sliding block, and the back part and the two side parts constitute an extension of the sliding block. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0020] Figure 1 The overall structural schematic diagram provided for the embodiment of the present application is shown in the figure.

[0021] Figure 2 The main shaft box structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0022] Figure 3 The take-up mechanism structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0023] Figure 4 The driving frame structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0024] Figure 5 The first inclined groove structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0025] Figure 6 The connecting groove structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0026] Figure 7 The second inclined groove structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0027] Figure 8 The movable groove inner structure schematic diagram provided for another embodiment of the present application is shown in the figure.

[0028] Figure 9 The trigger rod structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0029] Figure 10 The connecting rod structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0030] Figure 11 The vertical groove structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0031] Figure 12 The driving frame structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0032] Figure 13 The baffle structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0033] Figure 14 The hinged rod structural schematic diagram provided for another embodiment of the present application is shown in the figure.

[0034] Explanation of reference signs:

[0035] 1, saddle; 2, main shaft box; 3, sliding block; 4, sliding rail; 5, back part; 6, side part; 7, first sliding groove; 8, second sliding groove; 9, driving frame; 10, inclined plate; 11, first inclined groove; 12, first connecting column; 13, extension part; 14, connecting block; 15, second inclined groove; 16, second connecting column; 17, through hole; 18, oil storage channel; 19, branch pipe; 20, movable pipe; 21, ball; 22, annular plate; 23, arc plate; 24, elastic sheet; 25, trigger rod; 26, second elastic member; 27, wedge surface; 28, vertical groove; 29, baffle; 30, hinged rod; 31, connecting rod. DETAILED DESCRIPTION

[0036] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0037] With reference to Figures 1-14 The embodiment of the present application provides a four-guide-rail head pulley structure, which comprises a saddle 1 and a main shaft box 2, the saddle 1 is fixed with a sliding block 3, the main shaft box 2 is fixed with a sliding rail 4, a folding and unfolding mechanism is arranged on the sliding block 3, the folding and unfolding mechanism comprises a back part 5 and two side parts 6 which are slidingly connected to the sliding block 3, and a lubricating assembly is arranged on the back part 5; further comprising a driving assembly, which has a first stroke of driving the back part 5 to approach the sliding rail 4 and a second stroke of driving the two side parts 6 to approach each other.

[0038] Specifically, the cradle five-axis machine is also called a five-axis machining center, which is a high-tech and high-precision machining center specially used for machining complex curved surfaces, and has the characteristics of high efficiency and high precision. For the cradle five-axis machine, the spindle box 2 is centrally mounted on the saddle 1 through the guide rail (i.e., the slider 3 and the slide rail 4 structure), the saddle 1 is suspended on the cross beam through the guide rail, and the cross beam is installed on the guide rail of the side wall of the bed body, so that the spindle box 2 can move on the bed body, thereby processing the workpiece clamped on the bed body through the cutter on the spindle box 2. The above are all prior art and will not be described here. The innovation of the embodiment of the present application is that a back surface part 5 and two side surface parts 6 are arranged on the slider 3, and a driving assembly is further arranged to drive the back surface part 5 and the two side surface parts 6. The driving assembly can be selected from a combination of multiple linear driving structures, such as a cylinder or a hydraulic cylinder structure, to drive the back surface part 5 to approach the slide rail 4 or to drive the two side surface parts 6 to approach each other. A lubricating assembly can be selected from a ball lubricating structure in the prior art, which is located on the side of the back surface part 5 close to the slide rail 4 to lubricate the slide rail 4 when the back surface part 5 is attached to the slide rail 4. The advantage of such a configuration is that when the slider 3 and the slide rail 4 are fitted and installed, the first stroke and the second stroke of the driving assembly drive the back surface part 5 and the two side surface parts 6 away from each other, thereby increasing the space for installing the slide rail 4, so that one end of the slide rail 4 can be placed between the back surface part 5 and the two side surface parts 6 at will. Subsequently, the back surface part 5 and the two side surface parts 6 are driven by the driving assembly to approach each other (i.e., to approach the slide rail 4), thereby forcing the slide rail 4 to align with the slider 3, so that the back surface part 5 and the two side surface parts 6 constitute an extension of the slider 3. Subsequently, the slider 3 can slide along the length direction of the slide rail 4. During the process, the lubricating member can lubricate the slider 3 and the slide rail 4 to reduce the friction between the slider 3 and the slide rail 4. When the driving assembly drives the back surface part 5 and the two side surface parts 6 away from each other, the space between the back surface part 5 and the side surface part 6 increases, facilitating the maintenance and repair of the lubricating part.

[0039] In another embodiment of the present application, further, the saddle 1 is fixed with four sliders 3, and the spindle box 2 is fixed with four slide rails 4. Specifically, the inside of the saddle 1 is hollow to surround the spindle box 2, and the four sliders 3 are respectively fixed on the four inner walls of the saddle 1. Correspondingly, the four slide rails 4 are respectively fixed on the four outer walls of the spindle box 2. In this way, the four sliders 3 and the four slide rails 4 can improve the stability of the spindle box 2. In the prior art, two slide rails 4 are generally arranged between the spindle box 2 and the saddle 1, and the two slide rails 4 are centrally arranged on the side of the spindle box 2 close to the saddle 1. Such an arrangement makes the rigidity of the spindle box 2 weak, and the vibration amplitude of the cutter on the spindle box 2 is large during cutting motion. In the present embodiment, four slide rails 4 are arranged on the spindle box 2, and the four slide rails 4 are respectively arranged on the four sides of the spindle box 2. In this way, the rigidity of the spindle box 2 is increased, and the amplitude of the cutter on the spindle box 2 is minimized.

[0040] Further, the sliding block 3 is provided with a first sliding groove 7 and two second sliding grooves 8, the back part 5 is slidingly connected in the first sliding groove 7, and the two side parts 6 are respectively slidingly connected in the two second sliding grooves 8. Specifically, the first sliding groove 7 and the second sliding grooves 8 are both provided on one end of the sliding block 3, the first sliding groove 7 is arranged along the thickness direction of the sliding block 3, and the two second sliding grooves 8 are symmetrically arranged and arranged along the width direction of the sliding block 3; in this way, the back part 5 can be close to or away from the sliding rail 4 along the first sliding groove 7, and the two side parts 6 can be close to or away from each other along the second sliding grooves 8.

[0041] As an alternative to the above-mentioned driving the back part 5 to slide along the sliding block 3 through a linear driving structure, preferably, the driving assembly includes a driving frame 9 slidingly connected to the sliding block 3, the driving frame 9 is provided with a slope plate 10, the slope plate 10 is provided with a first inclined groove 11, the back part 5 is provided with a first connecting column 12, and the first connecting column 12 is slidingly connected in the first inclined groove 11. Specifically, the driving frame 9 is attached to the outer wall of the sliding block 3 and extends towards the two side walls of the sliding block 3, the driving frame 9 is provided with an extension 13, the slope plate 10 is located at one end of the extension 13 away from the driving frame 9, and the end of the slope plate 10 closer to the extension 13 is closer to the back part 5; the first inclined groove 11 is arranged along the slope plate 10, that is, the end of the first inclined groove 11 closer to the driving frame 9 is closer to the back part 5, and the first connecting column 12 is adapted to the first inclined groove 11; the driving frame 9 is arranged along the length direction of the sliding block 3, and a linear driving mechanism can be arranged on the sliding block 3 to drive the driving frame 9 to slide along the length direction of the sliding block 3. The linear driving mechanism can be selected from the existing technology, such as a screw rod or a cylinder structure, which is prior art, and the linear driving mechanism is not shown here and will not be described here. The advantage of such arrangement is that when the driving frame 9 is close to the back part 5 along the length direction of the sliding block 3, the connecting column and the back part 5 can be forced to approach the sliding rail 4 through the inner wall of the first inclined groove 11, and when the driving frame 9 is away from the back part 5 along the length direction of the sliding block 3, the connecting column and the back part 5 can be forced to move away from the sliding rail 4 through the inner wall of the first inclined groove 11, which is the first stroke of the driving assembly.

[0042] As an alternative to the above-mentioned structure of driving the two side portions 6 to approach each other by a straight driving structure, preferably, the driving assembly further comprises a connecting block 14 configured on the back portion 5, the connecting block 14 is configured with a second inclined slot 15, the side portion 6 is configured with a second connecting column 16, the second connecting column 16 is slidingly connected in the second inclined slot 15. Specifically, the connecting block 14 is located on the side of the back portion 5 close to the side portion 6, and the second inclined slot 15 is closer to the sliding rail 4 at the end close to the back portion 5; the side portion 6 is configured with a connecting groove away from the sliding rail 4, the second connecting column 16 is configured in the connecting groove, and the connecting block 14 is slidingly connected in the connecting groove. When the connecting block 14 extends into the connecting groove, the second connecting column 16 and the side portion 6 can be forced to approach the sliding rail 4 by the inner wall of the second inclined slot 15, which is the second stroke of the driving assembly. In this way, the driving frame 9 has a first position and a second position. In the first position, the back portion 5 and the two side portions 6 are separated from each other, and in the second position, the back portion 5 and the two side portions 6 are attached to each other. The driving frame 9 has a first position on the sliding block 3, at which time the back portion 5 and the two side portions 6 are separated from each other to increase the space between them, facilitating the installation of the sliding rail 4 or the maintenance of the lubricating assembly. When the driving frame 9 approaches the back portion 5, it switches to the second position. During this process, the first connecting column 12 and the back portion 5 can be forced to approach the sliding rail 4 by the first inclined slot 11, and at the same time, the second connecting column 16 and the side portion 6 can be forced to approach the sliding rail 4 by the second inclined slot 15. In this way, the back portion 5 and the two side portions 6 can be driven to approach the sliding rail 4 synchronously during the switching of the driving frame 9 to the second position. Conversely, the back portion 5 and the two side portions 6 can be driven to move away from the sliding rail 4 synchronously during the switching of the driving frame 9 to the first position.

[0043] In still another embodiment of the present application, further, the lubricating assembly comprises a movable groove formed on the back portion 5, a through hole 17 is formed on the back portion 5 and communicates with the movable groove, an oil storage channel 18 is formed in the slide rail 4, a branch pipe 19 is formed in the movable groove and communicates with the oil storage channel 18, a movable pipe 20 is slidably sleeved on the branch pipe 19, and a ball 21 is arranged at an end of the movable pipe 20 away from the branch pipe 19. An opening is formed at the end of the movable pipe 20 away from the branch pipe 19, and a first elastic member is arranged in the movable pipe 20 and used to force the ball 21 to block the opening. Specifically, the movable groove is formed in the slide block 3, the through hole 17 is located at one side of the movable groove close to the slide rail 4, so that the movable pipe 20 can be attached to the through hole 17 and the ball 21 at the end of the movable pipe 20 is exposed from the slide block 3; the oil storage channel 18 is arranged along the length direction of the slide block 3 and filled with lubricating oil; the branch pipe 19 is fixed in the movable groove along the thickness direction of the slide rail 4, the inner diameter of the movable pipe 20 is matched with the outer diameter of the branch pipe 19, so that the movable pipe 20 can be slidably sleeved on the branch pipe 19 and slide along the thickness direction of the slide block 3, the opening is formed at the end of the movable pipe 20 away from the branch pipe 19, and the ball 21 is located in the movable pipe 20 and can block the opening under the action of the first elastic member; the first elastic member can be a spring structure in the prior art, and preferably comprises an annular plate 22 slidably connected in the movable pipe 20, an arc-shaped plate 23 formed on the annular plate 22 and matched with the ball 21, and an elastic sheet 24 fixed on the annular plate 22 and having the other end fixed on the inner wall of the movable pipe 20. The diameter of the annular plate 22 is greater than the diameter of the ball 21, the diameter of the ball 21 is greater than the diameter of the opening, and the two ends of the elastic sheet 24 are respectively fixed on the inner wall of the movable pipe 20 and the annular plate 22, so as to force the annular plate 22 to be close to the opening through the elastic sheet 24, and then force the ball 21 to block the opening through the arc-shaped plate 23.

[0044] In this way, when the movable pipe 20 is put into the movable groove, the annular plate 22 can be forced to be away from the branch pipe 19 through the elastic sheet 24, so as to force the ball 21 to block the opening through the arc-shaped plate 23, and at this time, the lubricating oil in the oil storage channel 18 cannot flow out through the opening; when the movable pipe 20 is away from the branch pipe 19 and attached to the inner wall of the through hole 17, the ball 21 is exposed from the slide block 3 at the opening and the through hole 17, at this time, the ball 21 and the annular plate 22 can be forced to be close to the branch pipe 19 by the slide rail 4 abutting against the ball 21, so as to open the opening, so that the lubricating oil can flow to the slide rail 4 through the opening, and the ball 21 can rotate between the arc-shaped plate 23 and the slide rail 4, so that the lubricating oil can be rolled on the slide rail 4 through the rotation of the ball 21, thereby reducing the friction and improving the lubricating efficiency.

[0045] Further, the back part 5 is provided with a trigger rod 25 extending into the movable slot and fixed with the movable tube 20, and the movable slot is provided with a second elastic member 26 for forcing the movable tube 20 into the movable slot. Specifically, the trigger rod 25 penetrates the back part 5 and extends into the movable slot, and a connecting rod 31 is fixed on the end of the trigger rod 25, and the other end of the connecting rod 31 is fixed with the movable tube 20. The second elastic member 26 can be a spring structure in the prior art, which is sleeved on the trigger rod 25, and one end of the second elastic member 26 is fixed with the outer wall of the trigger rod 25, and the other end is fixed with the inner wall of the movable slot, so that the trigger rod 25 and the movable tube 20 are forced away from the through hole 17 by the second elastic member 26 until the end of the trigger rod 25 abuts against the inclined plate 10 (that is, the inclined plate 10 can act as a limiting structure). In this way, the movable tube 20 is forced into the movable slot under the action of the second elastic member 26, and when it is necessary to lubricate the sliding rail 4, the trigger rod 25 can be forced to extend into the movable slot by an external force to drive the movable tube 20 to abut against the through hole 17, so that the sliding rail 4 is lubricated by the balls 21.

[0046] Preferably, the trigger rod 25 is provided with a wedge surface 27 at one end and the wedge surface 27 is exposed to the back part 5, and the drive frame 9 is provided with a vertical slot 28 communicating with the first inclined slot 11, and the drive frame 9 further has a third position in which the first connecting column 12 is located in the vertical slot 28 to force the movable tube 20 to abut against the through hole 17 by the abutment of the wedge surface 27 against the inclined plate 10. Specifically, the vertical slot 28 is formed on the extension 13 and is smoothly connected with the first inclined slot 11, and the drive frame 9 sequentially has the first position, the second position and the third position when the drive frame 9 moves along the sliding block 3 to approach the back part 5. When the drive frame 9 moves from the first position to the second position, the first connecting column 12 moves relative to the connection between the first inclined slot 11 and the vertical slot 28, so that the back part 5 and the two side parts 6 approach each other to abut against the sliding rail 4, and in the process, the wedge surface 27 at the end of the trigger rod 25 always abuts against the outer wall of the inclined plate 10, and the relative position of the movable tube 20 and the branch pipe 19 does not change. When the drive frame 9 moves from the second position to the third position, the first connecting column 12 moves in the vertical slot 28 to abut the wedge surface 27 against the outer wall of the inclined plate 10, so as to force the trigger rod 25 to extend into the movable slot, and in turn force the movable tube 20 to abut at the through hole 17 and expose the balls 21 to the sliding block 3. The advantage of this arrangement is that the movement of the drive frame 9 can first drive the back part 5 and the two side parts 6 to approach each other to abut against the sliding rail 4, and then drive the trigger rod 25 to abut at the through hole 17 to lubricate by the balls 21, and when the sliding block 3 and the sliding rail 4 do not need to be lubricated, the drive frame 9 can be reset to the second position to keep the position of the back part 5 and the two side parts 6 while making the movable tube 20 enter the movable slot.

[0047] In still another embodiment of the present application, further, the through hole 17 is symmetrically provided with two baffles 29, both of which are in sliding connection with the sliding block 3, and when the two baffles 29 are close to each other, the through hole 17 can be closed, and when the two baffles 29 are away from each other, the through hole 17 can be opened to expose the ball 21, and the outer wall of the movable tube 20 on the opposite sides is hinged with a hinge rod 30, and the other end of the two hinge rods 30 is respectively hinged with the two baffles 29; in this way, when the movable tube 20 is close to the through hole 17, the two baffles 29 can be forced to be away from each other to open the through hole 17 (as shown in Figure 14 ), and when the movable tube 20 is received in the adaptive slot, the two baffles 29 can be driven to be close to each other by the hinge rod 30 to close the through hole 17 (as shown in Figure 13 ). The advantage is that the two baffles 29 can be passively opened or closed by the hinge rod 30, so that the through hole 17 can be closed when the sliding rail 4 does not need to be lubricated, and impurities entering the through hole 17 can be avoided as much as possible to affect the operation of the lubricating assembly.

[0048] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A four-guide trolley structure comprising a saddle and a main shaft box, a sliding block is fixed on the saddle, and a sliding rail is fixed on the main shaft box, characterized in that, The slider is provided with The folding and unfolding mechanism comprises a back part and two side parts which are slidingly connected to the slider, the back part is provided with a lubricating assembly; and a driving assembly which has a first stroke for driving the back part to approach the slide rail and a second stroke for driving the two side parts to approach each other; The driving assembly comprises a driving frame which is slidingly connected to the slider, the driving frame is provided with an inclined plate, the inclined plate is provided with a first inclined slot, the back part is provided with a first connecting column which is slidingly connected to the first inclined slot; The driving assembly further comprises a connecting block which is provided on the back part, the connecting block is provided with a second inclined slot, the side part is provided with a second connecting column which is slidingly connected to the second inclined slot; The driving frame has a first position and a second position, in the first position, the back part and the two side parts are separated from each other, in the second position, the back part and the two side parts are attached to each other; The lubricating assembly comprises a movable slot which is provided on the back part, the back part is provided with a through hole which communicates with the movable slot, the slide rail is provided with an oil storage channel, the movable slot is provided with a branch pipe which communicates with the oil storage channel, the branch pipe is slidingly sleeved with a movable pipe, one end of the movable pipe which is away from the branch pipe is provided with a ball; The back part is inserted with a trigger rod, the trigger rod extends into the movable slot and is fixed with the movable pipe, the movable slot is provided with a second elastic member for forcing the movable pipe into the movable slot.

2. A four-guide structure of a trolley according to claim 1, characterized in that, The saddle is fixed with four sliders, and the main shaft box is fixed with four slide rails.

3. The four-guide structure of a crown block according to claim 1, wherein The slider is provided with a first sliding groove and two second sliding grooves, the back part is slidingly connected to the first sliding groove, and the two side parts are respectively slidingly connected to the two second sliding grooves.

4. The four-guide structure of a crown block according to claim 1, wherein One end of the movable pipe which is away from the branch pipe is provided with an opening, and the movable pipe is provided with a first elastic member for forcing the ball to block the opening.

5. The four-guide structure of a trolley according to claim 1, wherein One end of the trigger rod is provided with a wedge surface which is exposed to the back part, the driving frame is provided with a vertical slot which communicates with the first inclined slot, and the driving frame further has a third position, in which the first connecting column is located in the vertical slot, so that the wedge surface is abutted by the inclined plate and the movable pipe is forced to attach to the through hole.

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