A construction equipment cab lifting device

Abstract

The present invention provides a construction equipment cab lifting device, including an inner scissor frame, an outer scissor frame and a driving mechanism; the inner scissor frame and the outer scissor frame are hinged to form a scissor mechanism, and the driving mechanism is arranged at the hinge of the inner scissor frame and the outer scissor frame, for realizing relative rotation between the inner scissor frame and the outer scissor frame; the driving mechanism includes a driving motor and a reducer connected to the output shaft 1 of the driving motor; the output shaft 2 of the reducer is inserted into the hinge of the inner scissor frame and the outer scissor frame. The present invention forms a scissor mechanism by hingedly connecting the inner scissor frame and the outer scissor frame, which is easy to install and has a small space occupancy rate; the driving motor and the reducer cooperate to control the lifting speed of the scissor mechanism, provide lifting power for the scissor mechanism, and have the advantages of low working noise, high control accuracy and no oil pollution.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, and in particular to a lifting device for a cab of construction equipment. Background Art

[0002] In existing construction equipment, the lifting of the cab mostly uses a hydraulic cylinder as the power source, but the hydraulic lifting mechanism has the following disadvantages:

[0003] 1. The hydraulic lifting mechanism is large and heavy, and the cylinder size is large, resulting in a large space occupancy rate and inconvenient installation; when the hydraulic lifting mechanism is set at the center of the bottom of the cab, the cab will be affected by the eccentric load and cause poor stability;

[0004] Second, the noise is high during use, the operator's comfort experience inside the cab is poor, and it is easy to cause hearing damage to the operator;

[0005] 3. Hydraulic oil leakage is prone to occur during use, safety is difficult to guarantee, and the leaked hydraulic oil will pollute the construction environment.

[0006] 4. If the lifting mechanism is locked by hydraulic parts, when the hydraulic pipeline leaks, the locking will become unreliable; if a manual locking mechanism is used, the operation will be troublesome and it will be difficult to ensure safety during the manual locking process.

[0007] In summary, there is an urgent need for a construction equipment cab lifting device to solve the problems existing in the prior art. Summary of the invention

[0008] The present invention aims to provide a construction equipment cab lifting device to solve the problems of large space occupancy, high noise and low safety of the lifting mechanism when the construction equipment cab is applied with a hydraulic lifting mechanism.

[0009] To achieve the above-mentioned purpose, the present invention provides a construction equipment cab lifting device, including an inner scissor frame, an outer scissor frame and a driving mechanism; the inner scissor frame and the outer scissor frame are hinged to form a scissor mechanism, and the driving mechanism is arranged at the hinge of the inner scissor frame and the outer scissor frame, for realizing relative rotation between the inner scissor frame and the outer scissor frame; the driving mechanism includes a driving motor and a reducer connected to the output shaft 1 of the driving motor; the output shaft 2 of the reducer is inserted into the hinge of the inner scissor frame and the outer scissor frame.

[0010] Preferably, the inner scissor frame comprises an inner scissor frame longitudinal beam 1, and the housing of the reducer is fixedly connected to the inner scissor frame longitudinal beam 1; the inner scissor frame longitudinal beam 1 is provided with a sleeve 1 and a bearing 1 for inserting the output shaft 2, the sleeve 1 is nested inside the inner scissor frame longitudinal beam 1, the bearing 1 is nested at both ends of the sleeve 1, and the bearing 1 is between the sleeve 1 and the output shaft 2;

[0011] The external scissor frame comprises an external scissor frame longitudinal beam 1, and an internal spline sleeve for engaging with the output shaft 2 is fixedly provided on the external scissor frame longitudinal beam 1.

[0012] Preferably, the inner scissor frame further comprises an inner scissor frame longitudinal beam 2, and the outer scissor frame further comprises an outer scissor frame longitudinal beam 2, and a self-locking mechanism is provided at the hinge of the inner scissor frame longitudinal beam 2 and the outer scissor frame longitudinal beam 2.

[0013] Preferably, the self-locking mechanism comprises a connecting shaft, a ratchet, a claw and a claw rotating assembly; the connecting shaft is respectively inserted into the second longitudinal beam of the inner scissor frame and the second longitudinal beam of the outer scissor frame, and is rotationally connected to one of them and fixedly connected to the other;

[0014] The ratchet is sleeved on the connecting shaft and is fixedly connected to the connecting shaft;

[0015] The clamping claw is arranged relative to the ratchet wheel, and is used to cooperate with the ratchet wheel to realize self-locking between the inner scissor frame and the outer scissor frame;

[0016] The claw rotating assembly is connected to the claw and is used to drive the claw to rotate and release the self-locking between the claw and the ratchet;

[0017] The clamping claw and the clamping claw rotating assembly are arranged on the second longitudinal beam of the inner scissor frame or the second longitudinal beam of the outer scissor frame.

[0018] Preferably, the claw rotating assembly comprises a claw support and a claw rotating shaft rotatably arranged on the claw support; the claw is fixedly sleeved on the claw rotating shaft;

[0019] The clamping claw rotating assembly also includes a pushing block and a pushing driving member. The pushing block is arranged on the clamping claw rotating shaft. The pushing driving member is arranged opposite to the pushing block and is used to push the pushing block to rotate the clamping claw rotating shaft.

[0020] Preferably, the inner scissor frame further comprises a plurality of cross beams 1 connected between the inner scissor frame longitudinal beams 1 and the inner scissor frame longitudinal beams 2;

[0021] The external scissor frame also includes a plurality of cross beams 2 connected between the external scissor frame longitudinal beams 1 and 2.

[0022] Preferably, a construction equipment cab lifting device also includes a frame; the frame is provided with a fixed hinge support and a sliding limit support, which are used to achieve active connection with the outer scissor frame and the inner scissor frame respectively.

[0023] Preferably, the fixed hinge support is connected to the external scissor frame, and the external scissor frame longitudinal beam 1 and the external scissor frame longitudinal beam 2 are both provided with a sleeve 2, a pin 1 and a bearing 2; the sleeve 2 is nested at the end of the external scissor frame longitudinal beam 1 or the end of the external scissor frame longitudinal beam 2, the bearing 2 is nested at both ends of the sleeve 2, the pin 1 is inserted into the sleeve 2 and the bearing 2, and the bearing 2 is between the pin 1 and the sleeve 2; the two ends of the pin 1 are inserted into the fixed hinge support.

[0024] Preferably, the sliding limit support comprises a slide rail and fixed baffle seats arranged at both ends of the slide rail;

[0025] The ends of the inner scissor frame longitudinal beam 1 and the ends of the inner scissor frame longitudinal beam 2 are both provided with sliding members that cooperate with the slide rails; the ends of the inner scissor frame longitudinal beam 1 and the ends of the inner scissor frame longitudinal beam 2 are both provided with limit blocks that cooperate with the fixed baffle seat;

[0026] The sliding limit support also includes a movable baffle seat detachably connected to the slide rail.

[0027] Preferably, the sliding member includes a second pin shaft and a first shock-absorbing bushing, the second pin shaft is arranged on the end of the first longitudinal beam of the inner scissor frame or the end of the second longitudinal beam of the inner scissor frame; a set of the shock-absorbing bushing is arranged on the second pin shaft, and the first shock-absorbing bushing is used to slide or roll along the slide rail.

[0028] The application of the technical solution of the present invention has the following beneficial effects:

[0029] (1) In the present invention, a scissor mechanism is formed by hingedly connecting an inner scissor frame and an outer scissor frame, which is easy to install and has a small space occupancy rate. The lifting speed of the scissor mechanism can be controlled by cooperating with a driving motor and a reducer, providing lifting power for the scissor mechanism, and has the advantages of low working noise, high control accuracy and no oil pollution.

[0030] (2) In the present invention, the reducer is preferably a planetary reducer, which can effectively maintain the long-term operation of the drive motor, has a strong load-bearing capacity, can withstand large impacts, and can prevent the drive motor from being damaged due to overload.

[0031] (3) In the present invention, the output shaft 2 of the reducer and the inner scissor frame longitudinal beam 1 are rotatably connected through a shaft sleeve 1 and a bearing 1, and the output shaft 2 and the outer scissor frame longitudinal beam 1 are fixedly connected through an inner spline sleeve. The relative rotation between the inner scissor frame longitudinal beam 1 and the outer scissor frame longitudinal beam 1 can be achieved by rotating the output shaft 2, so that the scissor mechanism can be extended and retracted under the action of the drive motor and the reducer, thereby realizing the lifting and lowering of the cab.

[0032] (4) In the present invention, a self-locking mechanism is provided at the hinge of the inner scissor frame longitudinal beam 2 and the outer scissor frame longitudinal beam 2, which is used to achieve self-locking during the lifting process of the scissor mechanism, so that the lifting of the cab is safe and reliable.

[0033] (5) In the present invention, the self-locking mechanism includes a connecting shaft, a ratchet, a pawl and a pawl rotating assembly, which can achieve mechanical self-locking through the ratchet and the pawl, and automatic unlocking through the pawl rotating assembly. The operation is convenient and the self-locking reliability is high.

[0034] (6) In the present invention, the claw rotation assembly includes a push block and a push drive member, the push block is a cam, and the push drive member is a cylinder. When unlocking is required, the cylinder extends and the push cam rotates, which can drive the claw to rotate to achieve unlocking. It has the advantages of easy control and small space occupancy.

[0035] (7) In the present invention, there are four-point contacts between the scissor mechanism and the vehicle frame or between the scissor mechanism and the cab, which can form a stable support, making the cab less susceptible to unbalanced loads, and is beneficial to improving the stability of the cab during the lifting process.

[0036] (8) In the present invention, the sliding limit support includes a sliding rail and baffle seats arranged at both ends of the sliding rail, and the two baffle seats are combined to limit the extreme position of the movement range of the limit block; the sliding limit support also includes a movable baffle seat detachably connected to the sliding rail. When the scissors-type mechanism is lifted to a predetermined position, the movable baffle seat is installed on the sliding rail to limit the limit block on the inner scissors-type frame, and can cooperate with the self-locking mechanism to achieve double locking of the scissors-type mechanism.

[0037] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0039] Figure 1 It is a schematic diagram of a construction equipment cab lifting device and a cab used in conjunction with each other in an embodiment of the present application;

[0040] Figure 2 This is an embodiment of the present application Figure 1 A top view of the inner and outer scissor frames, the drive mechanism and the self-locking mechanism;

[0041] Figure 3 It is a partial exploded view of the driving mechanism and the inner scissor frame and the outer scissor frame in the embodiment of the present application;

[0042] Figure 4 It is a cross-sectional schematic diagram of the connection between the driving mechanism and the inner scissor frame and the outer scissor frame in the embodiment of the present application;

[0043] Figure 5 This is an embodiment of the present application Figure 2 Structural schematic diagram of the middle and inner scissor frame;

[0044] Figure 6 This is an embodiment of the present application Figure 2 Structural diagram of Chinese and foreign scissor frames;

[0045] Figure 7 It is an axial view of the inner scissor frame, the outer scissor frame, the drive mechanism and the self-locking mechanism in the embodiment of the present application;

[0046] Figure 8 This is an embodiment of the present application Figure 7 Partial exploded view of the self-locking mechanism;

[0047] Fig. 9 is a schematic diagram of the initial working state of the cab in an embodiment of the present application;

[0048] Fig.10 This is an embodiment of the present application Fig. 9 Schematic diagram of the use of the movable baffle seat;

[0049] Among them, 1. Internal scissor frame, 1.1. One longitudinal beam of the internal scissor frame, 1.2. One shaft sleeve, 1.3. One bearing, 1.4. Two longitudinal beams of the internal scissor frame, 1.5. One cross beam, 1.6. Limit block, 1.7. Two pins, 1.8. One shock-absorbing bushing, 1.9. Three pins, 1.10. Three shaft sleeves, 1.11. Three bearings, 2. External scissor frame, 2.1. One longitudinal beam of the external scissor frame, 2.2. Internal spline sleeve, 2.3. Two longitudinal beams of the external scissor frame, 2.4. Two cross beams, 2.5. Two shaft sleeves, 2.6. One pin, 2.7. Two bearings, 2.8. Four pins, 2.9. Shock-absorbing bushing Set 2, 3. Driving motor, 3.1. Output shaft 1, 4. Reducer, 4.1. Output shaft 2, 4.2. Housing, 5. Self-locking mechanism, 5.1. Connecting shaft, 5.2. Ratchet, 5.3. Claw, 5.4. Claw rotating assembly, 5.4.1. Claw support, 5.4.2. Claw rotating shaft, 5.4.3. Push block, 5.4.4. Push driving member, 6. Frame, 6.1. Fixed hinge support, 6.2. Sliding limit support, 6.2.1. Slide rail, 6.2.2. Fixed baffle seat, 6.2.3. Movable baffle seat, 7. Cab, 7.1. Mounting support. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0051] Example:

[0052] See also Figures 1 to 10 , a construction equipment cab lifting device, this embodiment is applied to the lifting of the cab of a rock drilling trolley.

[0053] A construction equipment cab lifting device, see Figure 1 , comprising an inner scissor frame 1, an outer scissor frame 2 and a driving mechanism; the inner scissor frame 1 and the outer scissor frame 2 are hinged to form a scissor mechanism, a cab 7 is arranged on the top of the scissor mechanism, and the lifting and lowering of the cab 7 is achieved by the extension and retraction of the scissor mechanism; the driving mechanism is arranged at the hinge of one side of the inner scissor frame 1 and the outer scissor frame 2, and is used to achieve relative rotation between the inner scissor frame 1 and the outer scissor frame 2; see Figures 2 to 4, the driving mechanism includes a driving motor 3 and a reducer 4 connected to an output shaft 1 3.1 of the driving motor 3; the output shaft 2 4.1 of the reducer 4 is inserted into the hinge of the inner scissor frame 1 and the outer scissor frame 2. Compared with the prior art in which the scissor mechanism is driven to extend and retract by a hydraulic cylinder, the present application cooperates with the driving motor 3 and the reducer 4 to control the lifting and lowering speed of the scissor mechanism, providing lifting and lowering power for the scissor mechanism, and has the advantages of low working noise, high control accuracy and no oil pollution. In this embodiment, the reducer 4 is a planetary reducer, which can effectively maintain the long-term operation of the driving motor 3, has a strong load-bearing capacity, can withstand large impacts, and prevent the driving motor 3 from being damaged by overload.

[0054] See also Figures 2 to 4 The inner scissor frame 1 includes an inner scissor frame longitudinal beam 1.1, and the housing 4.2 of the reducer 4 is fixedly connected to the inner scissor frame longitudinal beam 1.1 by bolts or welding; the inner scissor frame longitudinal beam 1.1 is provided with a sleeve 1.2 and a bearing 1.3 for inserting the output shaft 2 4.1, the sleeve 1.2 is nested inside the inner scissor frame longitudinal beam 1.1, and the two bearings 1.3 are nested at both ends of the sleeve 1.2, and the bearing 1.3 is between the sleeve 1.2 and the output shaft 2 4.1, so that the output shaft 2 4.1 of the reducer 4 and the inner scissor frame longitudinal beam 1.1 can rotate relative to each other;

[0055] The outer scissor frame 2 includes an outer scissor frame longitudinal beam 1 2.1, on which an inner spline sleeve 2.2 for engaging with the output shaft 2 4.1 is fixed, so that the outer scissor frame longitudinal beam 1 2.1 can rotate together with the output shaft 2 4.1, thereby causing relative rotation between the inner scissor frame longitudinal beam 1.1 and the outer scissor frame longitudinal beam 1 2.1, so that the scissor mechanism can be extended and retracted under the action of the drive motor 3 and the reducer 4.

[0056] See also Figure 2 and Figure 7 The inner scissor frame 1 also includes an inner scissor frame longitudinal beam 1.4, and the outer scissor frame 2 also includes an outer scissor frame longitudinal beam 2.3. A self-locking mechanism 5 is provided at the hinge of the inner scissor frame longitudinal beam 1.4 and the outer scissor frame longitudinal beam 2.3, which is used to achieve self-locking during the lifting process of the scissor mechanism, so that the lifting of the cab 7 is safe and reliable.

[0057] See also Figure 7 The self-locking mechanism 5 includes a connecting shaft 5.1, a ratchet 5.2, a claw 5.3 and a claw rotating assembly 5.4; the connecting shaft 5.1 is respectively inserted into the inner scissor frame longitudinal beam 1.4 and the outer scissor frame longitudinal beam 2.3, and is rotatably connected to one of them and fixedly connected to the other. The connecting shaft 5.1 is a threaded shaft, and a fastening nut can be set at its end to fasten each component;

[0058] The ratchet 5.2 is sleeved on the connecting shaft 5.1 and is fixedly connected to the connecting shaft 5.1. In this embodiment, the ratchet 5.2 is fixedly arranged in the middle of the connecting shaft 5.1 and is located between the inner scissor frame longitudinal beam 1.4 and the outer scissor frame longitudinal beam 2.3, which can save the installation space of the self-locking mechanism 5.

[0059] The clamping claw 5.3 is arranged relative to the ratchet 5.2, and is used to cooperate with the ratchet 5.2 to realize self-locking between the inner scissor frame 1 and the outer scissor frame 2;

[0060] The claw rotating assembly 5.4 is connected to the claw 5.3 and is used to drive the claw 5.3 to rotate and release the abutment self-locking between the claw 5.3 and the ratchet 5.2;

[0061] The clamping claw 5.3 and the clamping claw rotating assembly 5.4 are arranged on the inner scissor frame longitudinal beam 2 1.4 or the outer scissor frame longitudinal beam 2.3.

[0062] In this embodiment, the claw rotating assembly 5.4 is arranged on the inner scissor frame longitudinal beam 1.4, and the claw rotating assembly 5.4 includes a claw support 5.4.1 and a claw rotating shaft 5.4.2 rotatably arranged on the claw support 5.4.1; the claw 5.3 is fixedly sleeved on the claw rotating shaft 5.4.2; the claw support 5.4.1 is fixedly arranged on the inner scissor frame longitudinal beam 1.4, and when the claw rotating shaft 5.4.2 rotates, the claw 5.3 can be driven to rotate synchronously;

[0063] The claw shaft 5.4.2 can be driven to rotate by a rotary drive member in the prior art, such as a rotary motor, an electric motor, etc. In the present embodiment, the claw rotating assembly 5.4 also includes a push block 5.4.3 and a push drive member 5.4.4. The push block 5.4.3 is fixedly arranged on the claw shaft 5.4.2, and the push drive member 5.4.4 is arranged relative to the push block 5.4.3, and is used as a rotary drive member to push the push block 5.4.3 to rotate the claw shaft 5.4.2; in the present embodiment, the push block 5.4.3 is a cam, and the push drive member is a cylinder. When unlocking is required, the cylinder extends out, and the push cam rotates, which can drive the claw 5.3 to rotate to achieve unlocking, and has the advantages of convenient control and small space occupancy.

[0064] In this embodiment, the driving mechanism and the self-locking mechanism 5 are respectively located on both sides of the scissor-type mechanism, and are reasonably distributed to avoid mutual interference between the mechanisms.

[0065] See also Figure 4 The inner scissor frame 1 further comprises a plurality of cross beams 1.5 connected between the inner scissor frame longitudinal beam 1.1 and the inner scissor frame longitudinal beam 2 1.4, for enhancing the structural stability of the inner scissor frame 1;

[0066] See also Figure 5 The external scissor frame 2 also includes a plurality of cross beams 2.4 connected between the external scissor frame longitudinal beams 1 2.1 and the external scissor frame longitudinal beams 2 2.3, so as to enhance the structural stability of the external scissor frame 2.

[0067] See also Figure 1 and Figure 8 A construction equipment cab lifting device also includes a frame 6 for connecting to the main body of the rock drilling trolley; the frame 6 is provided with a fixed hinge support 6.1 and a sliding limit support 6.2, which are used to realize active connection with the outer scissor frame 2 and the inner scissor frame 1 respectively. In this embodiment, the outer scissor frame 2 is connected to the fixed hinge support 6.1, and the inner scissor frame 1 is connected to the sliding limit support 6.2, so as to realize the active connection between the scissor mechanism and the frame 6;

[0068] See also Figure 6 and Fig. 9 When the fixed hinge support 6.1 is connected to the outer scissor frame 2, the outer scissor frame longitudinal beam 1 2.1 and the outer scissor frame longitudinal beam 2.3 are both provided with a sleeve 2.5, a pin 1 2.6 and a bearing 2.7; the sleeve 2.5 is nested at the end of the outer scissor frame longitudinal beam 1 2.1 or the end of the outer scissor frame longitudinal beam 2.3, the bearing 2.7 is nested at both ends of the sleeve 2.5, the pin 1 2.6 is inserted into the sleeve 2.5 and the bearing 2.7, and the bearing 2.7 is between the pin 1 2.6 and the sleeve 2.5; the two ends of the pin 1 2.6 are inserted into the fixed hinge support 6.1, and the position of the pin 1 2.6 is kept fixed during the lifting and lowering process of the cab 7.

[0069] Correspondingly, a mounting support 7.1 is provided at the bottom of the cab 7, and a shaft sleeve three 1.10, a pin shaft three 1.9 and a bearing three 1.11 are provided on the inner scissor frame longitudinal beam one 1.1 and the inner scissor frame longitudinal beam two 1.4 of the inner scissor frame 1. The arrangement method is the same as that of the shaft sleeve two 2.5, the pin shaft one 2.6 and the bearing two 2.7, which will not be repeated here. The difference is that the pin shaft three 1.9 is arranged in the mounting support 7.1 of the cab 7.

[0070] See also Fig. 9 The sliding limit support 6.2 includes a slide rail 6.2.1 and fixed baffle seats 6.2.2 arranged at both ends of the slide rail 6.2.1;

[0071] See also Figure 4The ends of the inner scissor frame longitudinal beam 1.1 and the ends of the inner scissor frame longitudinal beam 2 1.4 are both provided with sliding parts that cooperate with the slide rail 6.2.1; the ends of the inner scissor frame longitudinal beam 1.1 and the ends of the inner scissor frame longitudinal beam 2 1.4 are both provided with limit blocks 1.6 that cooperate with the fixed baffle seats 6.2.2, and the combination of the two fixed baffle seats 6.2.2 limits the extreme position of the movement range of the limit blocks 1.6;

[0072] The sliding limit support 6.2 also includes a movable baffle seat 6.2.3 detachably connected to the slide rail 6.2.1. When the inner scissor frame 1 slides on the slide rail 6.2.1, the movable baffle seat 6.2.3 is first disassembled. When the scissor mechanism is lifted to a predetermined position, the movable baffle seat 6.2.3 is installed on the slide rail 6.2.1 to limit the limit block 1.6, which can cooperate with the self-locking mechanism to achieve double locking of the scissor mechanism. In this embodiment, the movable baffle seat 6.2.3 and the slide rail 6.2.1 are snap-fitted, and a plurality of snap-fitting holes can be set along the length direction of the slide rail 6.2.1 to achieve the snap-fitting of the movable baffle seat 6.2.3, such as Fig.10 As shown ( Fig.10 Only the clamping holes at the lifting limit position are indicated).

[0073] The sliding member includes a pin shaft 1.7 and a shock-absorbing bushing 1.8. The pin shaft 1.7 is arranged on the end of the inner scissor frame longitudinal beam 1.1 or the end of the inner scissor frame longitudinal beam 1.4; the shock-absorbing bushing 1.8 is sleeved on the pin shaft 1.7, and the shock-absorbing bushing 1.8 is used to slide or roll along the slide rail 6.2.1.

[0074] Correspondingly, a slide rail (not shown in the figure) cooperating with the external scissor frame 2 is also provided at the bottom of the cab 7. The ends of the external scissor frame longitudinal beam 1 2.1 and the external scissor frame longitudinal beam 2 2.3 are provided with a pin shaft 4 2.8 and a shock-absorbing bushing 2 2.9. The setting method is the same as that of the pin shaft 2 1.7 and the shock-absorbing bushing 1 1.8, which will not be repeated here. The difference is that the shock-absorbing bushing 2.9 slides or rolls on the slide rail at the bottom of the cab 7.

[0075] There are four-point contacts between the scissor mechanism and the frame 6 or between the scissor mechanism and the cab 7, which can form a stable support, making the cab 7 less susceptible to unbalanced loads, which is beneficial to improving the stability of the cab 7 during the lifting process.

[0076] The method of using the above-mentioned construction equipment cab lifting device is as follows: before lifting the cab 7, first pull out the movable baffle seat 6.2.3; the output shaft 1 3.1 of the driving motor 3 is powered on to rotate, driving the output shaft 2 4.1 of the reducer 4 to rotate, thereby causing the inner scissor frame 1 and the outer scissor frame 2 to rotate relative to each other; when the cab 7 is lifted to a predetermined position, the driving motor 3 stops running, the claw 5.3 abuts against the ratchet 5.2 to form a self-locking, and the movable baffle seat 6.2.3 is inserted into the clamping hole of the slide rail 6.2.1, and the operation can be started;

[0077] After the operation is completed, when the cab 7 needs to be further lifted or lowered, the movable baffle seat 6.2.3 is pulled out, the claw rotation assembly 5.4 is controlled to move, the self-locking between the claw 5.3 and the ratchet 5.2 is released, and then the inner scissor frame 1 and the outer scissor frame 2 are controlled by the drive motor 3 to achieve relative rotation. After the cab 7 is lifted to the predetermined position, the drive motor 3 stops running, the claw 5.3 abuts against the ratchet 5.2 to form a self-locking, and the movable baffle seat 6.2.3 is inserted into the clamping hole of the slide rail 6.2.1.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction equipment cab lifting device, characterized in that: The invention comprises an inner scissor frame (1), an outer scissor frame (2) and a driving mechanism; the inner scissor frame (1) and the outer scissor frame (2) are hinged to form a scissor mechanism, and the driving mechanism is arranged at the hinge of the inner scissor frame (1) and the outer scissor frame (2) to realize relative rotation between the inner scissor frame (1) and the outer scissor frame (2); the driving mechanism comprises a driving motor (3) and a reducer (4) connected to an output shaft 1 (3.1) of the driving motor (3); an output shaft 2 (4.1) of the reducer (4) is inserted into the hinge of the inner scissor frame (1) and the outer scissor frame (2); The inner scissor frame (1) further comprises an inner scissor frame longitudinal beam 2 (1.4), and the outer scissor frame (2) further comprises an outer scissor frame longitudinal beam 2 (2.3), and a self-locking mechanism (5) is provided at the hinge of the inner scissor frame longitudinal beam 2 (1.4) and the outer scissor frame longitudinal beam 2 (2.3); The self-locking mechanism (5) comprises a connecting shaft (5.1), a ratchet (5.2), a claw (5.3) and a claw rotating assembly (5.4); The clamping claw rotating assembly (5.4) comprises a clamping claw support (5.4.1) and a clamping claw rotating shaft (5.4.2) rotatably arranged on the clamping claw support (5.4.1); the clamping claw (5.3) is fixedly sleeved on the clamping claw rotating shaft (5.4.2); The claw rotating assembly (5.4) further comprises a pushing block (5.4.3) and a pushing driving member (5.4.4); the pushing block (5.4.3) is arranged on the claw rotating shaft (5.4.2); the pushing driving member (5.4.4) is arranged opposite to the pushing block (5.4.3) and is used to push the pushing block (5.4.3) to rotate the claw rotating shaft (5.4.2).

2. A construction equipment cab lifting device according to claim 1, characterized in that: The inner scissor frame (1) comprises an inner scissor frame longitudinal beam 1 (1.1), and the housing (4.2) of the reducer (4) is fixedly connected to the inner scissor frame longitudinal beam 1 (1.1); the inner scissor frame longitudinal beam 1 (1.1) is provided with a shaft sleeve 1 (1.2) and a bearing 1 (1.3) for inserting the output shaft 2 (4.1); the shaft sleeve 1 (1.2) is nested inside the inner scissor frame longitudinal beam 1 (1.1), and the bearing 1 (1.3) is nested at both ends of the shaft sleeve 1 (1.2), and the bearing 1 (1.3) is between the shaft sleeve 1 (1.2) and the output shaft 2 (4.1); The external scissor frame (2) comprises an external scissor frame longitudinal beam 1 (2.1), on which an internal spline sleeve (2.2) for engaging with the output shaft 2 (4.1) is fixedly provided.

3. A construction equipment cab lifting device according to claim 2, characterized in that: The connecting shaft (5.1) is respectively inserted into the second longitudinal beam (1.4) of the inner scissor frame and the second longitudinal beam (2.3) of the outer scissor frame, and is rotationally connected to one of them and fixedly connected to the other; The ratchet (5.2) is sleeved on the connecting shaft (5.1) and is fixedly connected to the connecting shaft (5.1); The clamping claw (5.3) is arranged relative to the ratchet (5.2) and is used to cooperate with the ratchet (5.2) to achieve self-locking between the inner scissor frame (1) and the outer scissor frame (2); The claw rotating assembly (5.4) is connected to the claw (5.3) and is used to drive the claw (5.3) to rotate and release the self-locking between the claw (5.3) and the ratchet (5.2); The clamping claw (5.3) and the clamping claw rotating assembly (5.4) are arranged on the inner scissor frame longitudinal beam 2 (1.4) or the outer scissor frame longitudinal beam 2 (2.3).

4. A construction equipment cab lifting device according to claim 2 or 3, characterized in that: The inner scissor frame (1) further comprises a plurality of cross beams (1.5) connected between the inner scissor frame longitudinal beams (1.1) and the inner scissor frame longitudinal beams (1.4); The external scissor frame (2) also includes a plurality of second cross beams (2.4) connected between the first external scissor frame longitudinal beam (2.1) and the second external scissor frame longitudinal beam (2.3).

5. A construction equipment cab lifting device according to claim 4, characterized in that: It also includes a vehicle frame (6); the vehicle frame (6) is provided with a fixed hinge support (6.1) and a sliding limit support (6.2), which are used to realize active connection with the outer scissor frame (2) and the inner scissor frame (1) respectively.

6. A construction equipment cab lifting device according to claim 5, characterized in that: The fixed hinge support (6.1) is connected to the external scissor frame (2); the external scissor frame longitudinal beam 1 (2.1) and the external scissor frame longitudinal beam 2 (2.3) are both provided with a shaft sleeve 2 (2.5), a pin shaft 1 (2.6) and a bearing 2 (2.7); the shaft sleeve 2 (2.5) is nested at the end of the external scissor frame longitudinal beam 1 (2.1) or the end of the external scissor frame longitudinal beam 2 (2.3); the bearing 2 (2.7) is nested at both ends of the shaft sleeve 2 (2.5); the pin shaft 1 (2.6) is inserted into the shaft sleeve 2 (2.5) and the bearing 2 (2.7), and the bearing 2 (2.7) is between the pin shaft 1 (2.6) and the shaft sleeve 2 (2.5); the two ends of the pin shaft 1 (2.6) are inserted into the fixed hinge support (6.1).

7. A construction equipment cab lifting device according to claim 6, characterized in that: The sliding limit support (6.2) comprises a slide rail (6.2.1) and fixed baffle seats (6.2.2) arranged at both ends of the slide rail (6.2.1); The ends of the inner scissor frame longitudinal beam 1 (1.1) and the ends of the inner scissor frame longitudinal beam 2 (1.4) are both provided with sliding parts that cooperate with the slide rail (6.2.1); the ends of the inner scissor frame longitudinal beam 1 (1.1) and the ends of the inner scissor frame longitudinal beam 2 (1.4) are both provided with limit blocks (1.6) that cooperate with the fixed baffle seat (6.2.2); The sliding limit support (6.2) also includes a movable baffle seat (6.2.3) detachably connected to the slide rail (6.2.1).

8. The construction equipment cab lifting device according to claim 7, characterized in that: The sliding member comprises a second pin shaft (1.7) and a first shock-absorbing bushing (1.8); the second pin shaft (1.7) is arranged on the end of the first inner scissor frame longitudinal beam (1.1) or the end of the second inner scissor frame longitudinal beam (1.4); the first shock-absorbing bushing (1.8) is sleeved on the second pin shaft (1.7), and the first shock-absorbing bushing (1.8) is used to slide or roll along the slide rail (6.2.1).

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