Forward moving type forklift portal anti-shaking structure

Abstract

The invention discloses an anti-shaking structure for a gantry of a reach forklift, which relates to the technical field of forklifts and comprises a frame, a carriage, the gantry and a locking oil cylinder. The frame comprises a left supporting leg and a right supporting leg which are parallel to each other, and guide rails are arranged on the sides, close to each other, of the left supporting leg and the right supporting leg; the sliding frame is slidably connected to the guide rail, an upper roller and a lower roller are arranged on the two sides of the sliding frame, the upper roller abuts against the upper side of the guide rail, and the lower roller is clamped in the guide rail; the portal frame is vertically mounted on the sliding frame, and the portal frame and the sliding frame synchronously move along the guide rails; the locking oil cylinder is hinged between the frame and the door frame, and the locking oil cylinder can complete rigid coupling and decoupling of the door frame and the frame through locking and loosening of the locking oil cylinder; by means of the arrangement, shaking of the door frame when the door frame stops moving can be reduced through the locking oil cylinder, and shaking of the door frame when the door frame moves is reduced through cooperation of the upper rolling wheels, the lower rolling wheels and the guide rails.

Description

Technical Field

[0001] The present invention relates to the technical field of forklifts, and particularly to an anti-shake structure for the mast of a reach forklift. Background Art

[0002] The mast of a reach forklift is installed on a carriage, and the rollers on the carriage contact and cooperate with the channel steels of the left and right legs of the vehicle frame along with the forward movement cylinder, so that the carriage can move back and forth within the channel steels of the legs, and the mast installed on the carriage also moves back and forth with the carriage;

[0003] Because there is a certain gap between the carriage rollers and the channel steels of the vehicle frame legs, when moving back and forth under the action of the forward movement cylinder, the carriage will swing up and down around a certain roller due to the gap. The larger the carriage gap is, the greater the swing will be, and the mast will also move back and forth with the up and down swing of the carriage; because the reach forklift is generally equipped with a high mast, the small swing of the carriage is easily amplified by the high mast, resulting in a large swing amplitude of the mast when impacted.

[0004] Therefore, how to reduce the swing amplitude of the mast is a technical problem that those skilled in the art need to solve at present. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-shake structure for the mast of a reach forklift, which can reduce the swing amplitude of the mast.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An anti-shake structure for the mast of a reach forklift, comprising:

[0008] A vehicle frame, including parallel left and right legs, and guide rails are provided on the sides of the left and right legs close to each other;

[0009] A carriage, slidably connected to the guide rails, with upper rollers and lower rollers provided on both sides of the carriage. The upper rollers abut against the upper side of the guide rails, and the lower rollers are engaged in the guide rails;

[0010] A mast, vertically installed on the carriage and moving synchronously with the carriage along the guide rails;

[0011] A locking cylinder, hinged between the vehicle frame and the mast, and the locking cylinder can complete the rigid coupling and decoupling of the mast and the vehicle frame through its locking and unlocking.

[0012] Preferably, the vehicle frame further includes a roof guard assembly. One end of the locking cylinder is installed on the top of the roof guard assembly through a first cylinder seat plate, and the other end is installed in the middle of the mast through a second cylinder seat plate.

[0013] Preferably, both ends of the locking cylinder are hinged to the first cylinder seat plate and the second cylinder seat plate respectively through cylinder connection pins.

[0014] Preferably, a locking control valve is provided on the outer side of the cylinder barrel of the locking cylinder. The locking control valve realizes the locking and unlocking of the locking cylinder by controlling the on-off of the oil passage.

[0015] Preferably, the carriage is provided with opposite gantry mounting seats, and the gantry is mounted between the two gantry mounting seats through a gantry mounting shaft.

[0016] Preferably, a mounting seat cover plate is provided at the gantry mounting shaft, and the mounting seat cover plate is used to clamp the gantry mounting shaft to prevent it from loosening.

[0017] Preferably, a cross plate of the carriage is provided between the bottoms of the two gantry mounting seats, and the bottom of the gantry is connected to the cross plate of the carriage through a locking bolt;

[0018] A carriage oil cylinder seat is installed in the middle of the cross plate of the carriage, a frame oil cylinder seat is installed on the rear bent plate at the bottom of the frame, and a forward movement oil cylinder is hinged between the carriage oil cylinder seat and the frame oil cylinder seat. The forward movement oil cylinder is used to drive the carriage to move along the guide track.

[0019] Preferably, the guide track is specifically a channel steel with a U-shaped cross-section, and the diameter of the lower roller matches the groove width of the channel steel;

[0020] A channel steel upper backing plate is laid between the guide track and the upper roller.

[0021] Preferably, three lower rollers are arranged at intervals on both sides of the carriage, and lateral limit sliders that abut against the inner side walls of the guide track are also provided on both sides of the carriage. The lateral limit sliders are used to limit the movement of the carriage along the direction perpendicular to the extension of the guide track.

[0022] Compared with the above background art, a front-moving forklift gantry anti-shake structure provided by the present invention includes: a frame, a carriage, a gantry and a locking cylinder; the frame includes parallel left and right legs, and guide tracks are provided on the sides of the left and right legs close to each other; the carriage is slidably connected to the guide track, and upper and lower rollers are provided on both sides of the carriage. The upper roller abuts against the upper side of the guide track, and the lower roller is engaged with the guide track; the gantry is vertically installed on the carriage and moves synchronously with the carriage along the guide track; the locking cylinder is hinged between the frame and the gantry, and the locking cylinder can complete the rigid coupling and decoupling of the gantry and the frame through its locking and unlocking.

[0023] Specifically, the locking cylinder is rotatably connected between the mast and the vehicle frame. That is to say, when the locking cylinder is in the locked state, the mast and the vehicle frame are rigidly connected. Since the vehicle frame does not shake randomly, the mast rigidly connected to it will not shake randomly. In addition, upper rollers and lower rollers with different heights are arranged on both sides of the carriage to prevent the mast from shaking during movement. The upper rollers abut against the upper top surface of the guide track, and the lower rollers are exactly located inside the guide track. In this way, when the carriage moves, the upper rollers and the lower rollers cooperate with each other and will closely adhere to the guide track to move, so as to minimize the shaking of the mast during movement. When the mast stops moving, the locking cylinder will be in the locked state to prevent the mast from shaking. When the mast has an action, the locking cylinder will be released, so that the mast and the vehicle frame are in a decoupled state to prevent the locking cylinder from affecting the action of the mast. It should be noted that in this application, when the height of the fork on the mast is relatively low, the shaking amplitude of the mast is small, and the locking cylinder will always be in the released state. With such a setting, the shaking of the mast when it stops moving can be reduced by the locking cylinder, and the shaking of the mast during movement can be reduced by the cooperation of the upper rollers, the lower rollers and the guide track. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0025] Figure 1 Schematic diagram of the anti-shaking structure provided by the embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the carriage structure provided by the embodiment of the present invention.

[0027] Wherein:

[0028] 01 - vehicle frame, 02 - left leg, 03 - right leg, 04 - guide track, 05 - carriage, 06 - upper roller, 07 - lower roller, 08 - mast, 09 - locking cylinder, 10 - overhead guard assembly, 11 - first cylinder seat plate, 12 - second cylinder seat plate, 13 - cylinder connection pin, 14 - locking control valve, 15 - mast mounting seat, 16 - mast mounting shaft, 17 - mounting seat cover plate, 18 - carriage cross plate, 19 - locking bolt, 20 - carriage cylinder seat, 21 - vehicle frame cylinder seat, 22 - forward movement cylinder, 23 - upper channel steel cushion plate, 24 - lateral limit slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] To enable those skilled in the art of this technology to better understand the solution of the present invention, the following further elaborates on the present invention in conjunction with the accompanying drawings and specific implementation manners.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", and "right" etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0032] The object of the present invention is to provide an anti - sway structure for the mast of a reach - truck, which can reduce the sway amplitude of the mast.

[0033] To achieve the above object, the present invention provides the following technical solutions:

[0034] Please refer to Figure 1 and Figure 2 , this embodiment provides an anti - sway structure for the reach mast 08, including: a vehicle frame 01, a carriage 05, a mast 08, and a locking cylinder 09; the vehicle frame 01 includes left and right legs 02 and 03 that are parallel to each other, and guide rails 04 are provided on the sides of the left and right legs 02 and 03 that are close to each other; the carriage 05 is slidably connected to the guide rails 04, and upper rollers 06 and lower rollers 07 are arranged on both sides of the carriage 05. The upper rollers 06 abut against the upper side of the guide rails 04, and the lower rollers 07 are engaged with the guide rails 04; the mast 08 is vertically installed on the carriage 05 and moves synchronously with the carriage 05 along the guide rails 04; the locking cylinder 09 is hinged between the vehicle frame 01 and the mast 08, and the locking cylinder 09 can complete the rigid coupling and decoupling of the mast 08 and the vehicle frame 01 through its locking and unlocking.

[0035] Specifically, the locking cylinder 09 is rotatably connected between the mast 08 and the vehicle frame 01. Specifically, as shown in Figure 1 , that is to say, when the locking cylinder 09 is in the locked state, the mast 08 and the vehicle frame 01 are rigidly connected. Since the vehicle frame 01 does not sway randomly, the mast 08 rigidly connected to it will not sway randomly. When the locking cylinder 09 is in the released state, the mast 08 will be in a decoupled state from the vehicle frame 01, and in this state, the mast 08 can move relative to the vehicle frame 01.

[0036] In addition, in this embodiment, not only is a locking oil cylinder 09 provided to reduce the shaking of the mast 08, but also relevant settings are made at the connection between the carriage 05 and the vehicle frame 01 to reduce the stability between the carriage 05 and the vehicle frame 01 during movement, thereby reducing the shaking of the mast 08 mounted on the carriage 05. Specifically, guide rails 04 are fixedly installed on the inner sides of the left and right legs 02 and 03 of the vehicle frame 01. Correspondingly, upper rollers 06 and lower rollers 07 at different heights in the vertical direction are provided at the places where the left and right sides of the carriage 05 are in contact with the guide rails 04. Among them, the upper roller 06 presses against the upper top surface of the guide rail 04, that is, the upper roller 06 rolls on the outer top of the guide rail 04, while the lower roller 07 is located inside the guide rail 04, that is, the lower roller 07 moves within the predetermined track of the guide rail 04, as specifically shown in Figure 2 shown; it should be noted that the outer diameter dimension of the lower roller 07 matches the track dimension of the guide rail 04. In this way, when the carriage 05 moves, the upper roller 06 and the lower roller 07 cooperate with each other and will tightly adhere to the guide rail 04 and move, so that the shaking of the mast 08 during movement can be reduced to the greatest extent.

[0037] In this embodiment, the action of the locking oil cylinder 09 is jointly determined by the states of the carriage 05 and the fork on the mast 08. Specifically, there are two control logics for the locking oil cylinder 09. One is that as long as the mast 08 starts to move, including the movement of the carriage 05 or the rise of the fork, the locking oil cylinder 09 will be decoupled to prevent it from affecting the movement of the mast 08. When the mast 08 stops moving, the locking oil cylinder 09 immediately locks, that is, the rigid coupling between the vehicle frame 01 and the mast 08 is completed. The other control logic is that regardless of whether the mast 08 is unloaded or loaded, as long as the fork is in the low position, the locking oil cylinder 09 will always be in the released state, and the vehicle frame 01 and the mast 08 are always in a decoupled floating connection state, and the other working conditions are executed according to the first control logic.

[0038] Specifically, when the mast 08 stops moving, the locking oil cylinder 09 will be in the locked state to prevent the mast 08 from shaking. When the mast 08 has an action, the locking oil cylinder 09 will be released, so that the mast 08 and the vehicle frame 01 are in a decoupled state to prevent the locking oil cylinder 09 from affecting the movement of the mast 08. However, when the fork on the mast 08 is at a relatively low height, the shaking amplitude of the mast 08 is small, and the locking oil cylinder 09 will always be in the released state. With such a setting, the shaking of the mast 08 when it stops moving can be reduced by the locking oil cylinder 09, and the shaking of the mast 08 during movement can be reduced by the cooperation of the upper roller 06, the lower roller 07 and the guide rail 04.

[0039] Here, a sensor can also be provided on the vehicle frame 01. The sensor is connected to a controller, and the controller is also signal-connected to the locking cylinder 09. The controller can also obtain the action signal of the mast 08 through the sensor. When the controller obtains that the mast 08 is about to move, the controller will control the locking cylinder 09 to decouple to prevent the locking cylinder 09 from affecting the movement of the mast 08. When the controller determines through the sensor that the mast 08 stops moving, the locking cylinder 09 will also lock immediately afterwards, rigidly coupling the mast 08 with the overhead guard assembly 10 of the vehicle frame 01 to suppress the swaying tendency of the mast 08 in the shortest time.

[0040] In addition, the sensor can also detect the position of the fork. When the fork is in the low position, the controller determines through the sensor that the fork is in the low position, and then the controller controls the locking cylinder 09 to be in the released state.

[0041] For the above two control logics of the locking cylinder 09, control buttons can be provided in the cab of the vehicle frame 01. The control buttons are connected to the controller. In the initial state, the control buttons do not control the locking cylinder 09. When the control button is pressed once, the controller executes the logic that "as long as the mast 08 starts to move, including the movement of the carriage 05 or the rise of the fork, the locking cylinder 09 will decouple". When the control button is pressed twice (triggered twice in a short time, such as pressed twice within 2 seconds), the controller executes the logic that "regardless of whether the mast 08 is unloaded or loaded, as long as the fork is in the low position, the locking cylinder 09 will always be in the released state". When the control button is pressed more than twice (triggered more than twice in a short time, such as pressed more than twice within 2 seconds), the controller will regard it as an invalid instruction, and it can be considered that the control button is still in the initial state and does not control the locking cylinder 09.

[0042] In addition, an indicating device is also provided in the cab. The indicating device is connected to the controller. When the controller executes the above different logics, the indicating device will give different indication signals (such as different color lights flashing or voice announcements).

[0043] Preferably, the vehicle frame 01 further includes an overhead guard assembly 10. One end of the locking cylinder 09 is installed on the top of the overhead guard assembly 10 through a first cylinder seat plate 11, and the other end is installed in the middle of the mast 08 through a second cylinder seat plate 12.

[0044] Such as Figure 1As shown in the figure, in this embodiment, the vehicle frame 01 further includes a overhead guard assembly 10 behind the mast 08. In order to enable the locking cylinder 09 to achieve the maximum connection effect with the minimum stroke, in this embodiment, one end of each of the two ends of the locking cylinder 09 is hinged to the top of the overhead guard assembly 10, and the other end is hinged to the middle part of the mast 08 in the vertical direction. Such a setting not only facilitates the installation of the locking cylinder 09, but also can reduce the required length of the locking cylinder 09, that is, a locking cylinder 09 with a smaller stroke can be selected, which can reduce the cost to the greatest extent.

[0045] Further, both ends of the locking cylinder 09 are respectively hinged to the first cylinder seat plate 11 and the second cylinder seat plate 12 through the cylinder connecting pins 13.

[0046] Specifically, in this embodiment, in order to ensure that the locking cylinder 09 does not affect the movement of the mast 08 in the released state, both ends of the locking cylinder 09 are hinged using the cylinder connecting pins 13. Specifically, the end where the cylinder barrel of the locking cylinder 09 is located is hinged to the first cylinder seat plate 11 through the cylinder connecting pin 13, and the end where the telescopic rod of the locking cylinder 09 is located is hinged to the second cylinder seat plate 12 through the cylinder connecting pin 13. In this way, when the locking cylinder 09 is in the decoupled state and the mast 08 moves, the telescopic rod of the locking cylinder 09 will extend or retract, and the telescopic rod and the cylinder barrel will rotate by themselves to adjust the angle.

[0047] In addition, in this embodiment, in order to strengthen the connection between the mast 08 and the vehicle and to prevent the locking cylinder 09 from being damaged by the pulling force, two groups of locking cylinders 09 are arranged in parallel between the vehicle frame 01 and the mast 08. The two groups of locks are parallel to each other and act simultaneously. Correspondingly, two groups of first cylinder seat plates 11 and second cylinder seat plates 12 are also provided. Of course, the number of the locking cylinders 09 and the height of their connected ends can also be appropriately adjusted according to the actual situation, and no specific limitation is made in this article.

[0048] Preferably, a locking control valve 14 is provided on the outer side of the cylinder barrel of the locking cylinder 09. The locking control valve 14 realizes the locking and release of the locking cylinder 09 by controlling the on-off of the oil passage.

[0049] In this embodiment, the vehicle frame 01 and the mast 08 are connected by the locking cylinder 09. Correspondingly, in order to control the locking and release of the locking cylinder 09, a locking control valve 14 is provided on the outer side wall of its cylinder barrel. The locking control valve 14 can control the on-off of the oil circuit connected to the locking cylinder 09, and thus can control the locking and release of the locking cylinder 09.

[0050] Preferably, the carriage 05 is provided with opposite mast mounting seats 15, and the mast 08 is mounted between the two mast mounting seats 15 through the mast mounting shaft 16.

[0051] As shown Figure 2 in the figure, on both sides of the middle position of the carriage 05, a pair of gantry mounting seats 15 are vertically arranged. The two gantry mounting seats 15 are opposite and parallel to each other, and the gap between the two gantry mounting seats 15 exactly matches the width of the gantry 08. In this way, the gantry 08 can be installed between the two gantry mounting seats 15. In this embodiment, the gantry mounting shaft 16 is passed through between the gantry mounting seat 15 and the gantry 08 to complete the connection between the two.

[0052] Preferably, a mounting seat cover plate 17 is provided at the gantry mounting shaft 16, and the mounting seat cover plate 17 is used to clamp the gantry mounting shaft 16 to prevent it from loosening.

[0053] As shown Figure 2 in the figure, at the position between the gantry mounting shaft 16 and the gantry mounting seat 15, the mounting seat cover plate 17 is also clamped. The setting of the mounting seat cover plate 17 can play a role in clamping the gantry mounting shaft 16 to prevent it from loosening.

[0054] Furthermore, a carriage cross plate 18 is provided between the bottoms of the two gantry mounting seats 15. The bottom of the gantry 08 is connected to the carriage cross plate 18 through a locking bolt 19; a carriage oil cylinder seat 20 is installed in the middle of the carriage cross plate 18, and a vehicle frame oil cylinder seat 21 is installed on the rear bent plate at the bottom of the vehicle frame 01. A forward movement oil cylinder 22 is hinged between the carriage oil cylinder seat 20 and the vehicle frame oil cylinder seat 21, and the forward movement oil cylinder 22 is used to drive the carriage 05 to move along the guide rail 04.

[0055] A carriage cross plate 18 is also provided on the carriage 05. Specifically, the carriage cross plate 18 is located at the bottom of the two gantry mounting seats 15, and the carriage cross plate 18 spans both sides of the bottom of the carriage 05 and is perpendicular to the extending direction of the guide rail 04; in addition, the position where the carriage cross plate 18 is located exactly fits the rear side of the bottom of the gantry 08. In this embodiment, the gantry 08 and the carriage cross plate 18 can be connected through the locking bolt 19. In this way, the bottom of the gantry 08 is connected to the carriage 05 through the carriage cross plate 18, and at the same time, the middle position of the gantry 08 is connected to the carriage 05 through the gantry mounting seat 15 of the carriage 05. The two cooperate with each other to complete the fixed connection between the gantry 08 and the carriage 05, thereby minimizing the shaking of the gantry 08 caused by loose connection between the two.

[0056] In addition, in this embodiment, the overall movement of the carriage 05 and the gantry 08 is realized through the forward movement oil cylinder 22; specifically, the end where the cylinder barrel of the forward movement oil cylinder 22 is located is hinged to the carriage oil cylinder seat 20, and the end where the telescopic rod of the forward movement oil cylinder 22 is located is hinged to the vehicle frame oil cylinder seat 21, and the carriage oil cylinder seat 20 is fixedly installed at the middle position of the cross plate 18; in addition, as shown Figure 1As shown in the figure, the rear side bent plate provided at the bottom of the vehicle frame 01 can connect the ends of the two guiding rails 04, thereby preventing the two guiding rails 04 from shaking. The vehicle frame oil cylinder seat 20 is installed inside the rear side bent plate and is located near the end of one of the guiding rails 04. In this way, when the forward movement oil cylinder 22 extends, since the vehicle frame oil cylinder seat 20 is fixed to the vehicle frame 01, under the push of the reaction force, the carriage 05 and the gantry 08 will move forward relative to the sliding guide rail. When the forward movement oil cylinder 22 retracts, the carriage 05 and the gantry 08 move backward.

[0057] Preferably, the guiding rail 04 is specifically a channel steel with a U-shaped cross-section structure, and the diameter of the lower roller 07 matches the groove width of the channel steel. A channel steel upper backing plate 23 is laid between the guiding rail 04 and the upper roller 06.

[0058] In this embodiment, the guiding rail 04 is specifically a channel steel, and the cross-section of the channel steel perpendicular to its extending direction is a U-shaped structure. When the guiding rail 04 is installed on the left leg 02 and the right leg 03 of the vehicle frame 01, its notch faces inward, that is, the notches of the left channel steel and the right channel steel are opposite to each other, so that it is convenient for the lower rollers 07 on both sides of the carriage 05 to move inside the guiding rail 04. At the same time, in order to increase the stability of the carriage 05 during movement, the outer diameter of the lower roller 07 needs to match the notch width of the guiding rail 04.

[0059] In addition, it can be understood that when the fork of the gantry 08 has a load, the upper roller 06 presses against the upper side of the guiding rail 04, and a relatively large pressure load will be applied to the upper end face of the guiding rail 04. Therefore, in order to prevent the guiding rail 04 from being deformed due to the applied force, a layer of channel steel backing plate is also laid on its upper top, that is, the channel steel backing plate is located between the upper roller 06 and the guiding rail 04. Such a setting can extend the working life of the guiding rail 04 and also improve its working stability.

[0060] Preferably, three lower rollers 07 are arranged at intervals on both sides of the carriage 05. Lateral limiting sliders 24 that abut against the inner side wall of the guiding rail 04 are also arranged on both sides of the carriage 05. The lateral limiting sliders 24 are used to limit the movement of the carriage 05 in the direction perpendicular to the extending direction of the guiding rail 04.

[0061] In this embodiment, three lower rollers 07 are arranged on both sides of the carriage 05 that cooperate with the guiding rail 04, and a certain gap is left between the three lower rollers 07, which can increase the stability of the carriage 05 moving in the guiding rail 04 to a certain extent. Of course, the number of the lower rollers 07 arranged and the distance between the intervals can be adjusted according to the actual situation, and no specific limitation is made in this article.

[0062] Further, to prevent the carriage 05 from moving in a direction perpendicular to the extension direction of the guiding track 04 and causing the gantry 08 to shake, in this embodiment, two lateral limiting sliders 24 are also provided at the same height on the side of the carriage 05 where the lower rollers 07 are installed. The lateral limiting sliders 24 on both sides are located at both ends of the side of the carriage 05. With such an arrangement, it can be understood that when the lower rollers 07 move along the guiding track 04, the lateral limiting sliders 24 will abut against the inner side of the guiding track 04 to limit the crosstalk of the carriage 05 in a direction perpendicular to its moving direction. This can increase the stability of the carriage 05 during movement, and further increase the stability of the gantry 08 and reduce the shaking of the gantry 08.

[0063] Of course, the material of the lateral limiting sliders 24 can be selected according to the actual situation. In this article, nylon material can be preferably used, which can effectively absorb the shaking generated during the movement of the carriage 05.

[0064] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0065] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0066] The above has introduced the embodiments provided by the present invention in detail. Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A forward-moving forklift mast anti-sway structure, characterized in that: include: The frame (01) comprises a left leg (02) and a right leg (03) which are parallel to each other, and a guide track (04) is provided on the side where the left leg (02) and the right leg (03) are close to each other; A slide (05) is slidably connected to the guide rail (04), and upper rollers (06) and lower rollers (07) are provided on both sides of the slide (05), the upper rollers (06) abut against the upper side of the guide rail (04), and the lower rollers (07) are engaged in the guide rail (04); A door frame (08) is vertically mounted on the slide frame (05) and moves synchronously with the slide frame (05) along the guide track (04); A locking cylinder (09) is hinged between the vehicle frame (01) and the door frame (08), and the locking cylinder (09) can complete the rigid coupling and decoupling of the door frame (08) and the vehicle frame (01) through locking and releasing.

2. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: The vehicle frame (01) further comprises an overhead guard assembly (10), one end of the locking oil cylinder (09) being mounted on the top of the overhead guard assembly (10) via a first oil cylinder seat plate (11), and the other end being mounted on the middle of the door frame (08) via a second oil cylinder seat plate (12).

3. The anti-sway structure of the mast of a reach-type forklift according to claim 2, characterized in that: The two ends of the locking oil cylinder (09) are respectively hinged to the first oil cylinder seat plate (11) and the second oil cylinder seat plate (12) via oil cylinder connecting pins (13).

4. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: A locking control valve (14) is arranged outside the cylinder barrel of the locking oil cylinder (09), and the locking control valve (14) realizes locking and releasing of the locking oil cylinder (09) by controlling the opening and closing of the oil passage.

5. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: The slide frame (05) is provided with opposite gantry mounting seats (15), and the gantry (08) is mounted between the two gantry mounting seats (15) via a gantry mounting shaft (16).

6. The anti-sway structure of the mast of a reach-type forklift according to claim 5, characterized in that: A mounting seat cover plate (17) is provided at the portal mounting shaft (16), and the mounting seat cover plate (17) is used to clamp the portal mounting shaft (16) to prevent it from loosening.

7. The anti-sway structure of the mast of a reach-type forklift according to claim 6, characterized in that: A slide frame cross plate (18) is arranged between the bottoms of the two door frame mounting seats (15), and the bottom of the door frame (08) is connected to the slide frame cross plate (18) via a locking bolt (19); A carriage cylinder seat (20) is installed in the middle of the carriage cross plate (18), a frame cylinder seat (21) is installed on the rear curved plate at the bottom of the frame (01), and a forward cylinder (22) is hinged between the carriage cylinder seat (20) and the frame cylinder seat (21), and the forward cylinder (22) is used to drive the carriage (05) to move along the guide track (04).

8. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: The guide rail (04) is specifically a channel steel with a U-shaped cross section, and the diameter of the lower roller (07) matches the channel width of the channel steel; A channel steel upper pad (23) is laid between the guide rail (04) and the upper roller (06).

9. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: Three lower rollers (07) are arranged at intervals on both sides of the slide (05), and lateral limit sliders (24) are also arranged on both sides of the slide (05) to abut against the inner side walls of the guide rail (04). The lateral limit sliders (24) are used to limit the movement of the slide (05) in a direction perpendicular to the extension direction of the guide rail (04).

10. The anti-sway structure of the mast of a reach-type forklift according to claim 1, characterized in that: The locking cylinder (09) is configured as follows: When the fork is below the preset position, the locking cylinder (09) is always in a released state; when the fork is above the preset position and the mast (08) starts to move, the locking cylinder (09) is in a released state; When the fork is above a preset position and the mast (08) stops moving, the locking oil cylinder (09) is in a locked state.

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