Adjustment mechanism and adjustment method suitable for small excavator

Abstract

The present invention discloses an adjustment mechanism and adjustment method suitable for small excavators, belonging to the technical field of excavator equipment, and is intended to solve the problem of operating space for small excavators. The mechanism comprises: a yaw armrest box, a yaw pilot handle, and a multi-dimensional adjustment bracket. The yaw armrest box comprises a first armrest box and a second armrest box mounted on a hood base assembly, and the yaw pilot handle is mounted on the two armrest boxes respectively; the multi-dimensional adjustment bracket is connected between the armrest box and the hand rest; each armrest box comprises an armrest box base, a positioning assembly and an armrest box frame respectively mounted on the armrest box base, and a driving shaft and a passive shaft respectively connected to the bottom of the armrest box and plugged into the hood base assembly; the hood base assembly is provided with a positioning hole, a rotation hole, and an arc hole, which respectively cooperate with the positioning assembly, the driving shaft, and the passive shaft. The present invention can perform multi-stage yaw adjustment on the armrest box, thereby expanding the driver's operating space without affecting the operating performance and driving comfort.

Description

Technical Field

[0001] The invention relates to an adjusting mechanism and an adjusting method suitable for a small excavator, belonging to the technical field of excavator equipment. Background Art

[0002] With the development of society, construction machinery, particularly 1-ton mini excavators, are increasingly used in confined indoor construction environments both domestically and internationally. To fit through narrow elevator doors and high-rise building interiors, 1-ton mini excavators are typically limited to a width of 0.8 meters. This results in a narrow operating space for the driver. Furthermore, the poorly designed left and right armrests on the excavators further compress the operator's operating space, impacting comfort and efficiency.

[0003] Existing technologies attempt to address this issue by removing or narrowing the left and right armrests to increase the driver's operating space. While this can increase the operating space to a certain extent, the lack of armrest support can lead to fatigue after prolonged operation and fail to meet operational stability requirements. Furthermore, these measures offer limited space expansion and may affect the layout of other components within the armrest. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustment mechanism and adjustment method suitable for small excavators, which can perform multi-level swing adjustment on the armrest box, thereby expanding the driver's operating space without affecting the operating performance. By deflecting the pilot handle and the multi-dimensional adjustment bracket, the hand rest and the handle can be adjusted in angle and height with the swing of the armrest box, thereby improving the driver's comfort.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0006] In a first aspect, the present invention provides an adjustment mechanism suitable for a small excavator, comprising:

[0007] The yaw armrest box includes a first armrest box and a second armrest box mounted on the hood bottom plate assembly, and the first armrest box and the second armrest box are both connected to a hand rest;

[0008] Deflection pilot handles are mounted on the first armrest box and the second armrest box respectively;

[0009] A multi-dimensional adjustable bracket connected between the first armrest box, the second armrest box and the hand rest;

[0010] The first and second armrest boxes each include an armrest box bottom plate, a positioning assembly and an armrest box frame respectively mounted on the armrest box bottom plate, a handle connected to the armrest box frame, and a driving shaft and a driven shaft respectively connected to the bottom of the armrest box bottom plate and plugged into the hood bottom plate assembly;

[0011] The hood bottom plate assembly is provided with a positioning hole, a rotation hole and an arc hole for respectively cooperating with the positioning component, the driving shaft and the driven shaft;

[0012] There are a plurality of positioning holes, and the plurality of positioning holes are arranged from the inside to the outside along the hood bottom plate assembly, so that the first armrest box and the second armrest box can be positioned at multiple angles relative to the hood bottom plate assembly.

[0013] Optionally, the first armrest box and the second armrest box further include a limiting assembly, wherein the limiting assembly includes a first anti-collision ball mounted on the armrest box frame and a second anti-collision ball mounted on the armrest box bottom plate;

[0014] The first anti-collision ball is close to the front end of the armrest box bottom plate, and the second anti-collision ball is connected to the rear end of the armrest box bottom plate and close to the armrest box frame.

[0015] Optionally, the positioning assembly includes a positioning seat mounted on the armrest box bottom plate, a spring mounted in the positioning seat, and a positioning rod passing through the spring, the positioning seat and the armrest box bottom plate;

[0016] The positioning seat is a hollow structure with a stop groove inside for limiting the position of the spring;

[0017] One end of the positioning rod close to the positioning hole is a conical structure, and the other end is a spherical structure.

[0018] Optionally, one end of the armrest box frame is mounted on the armrest box bottom plate through a hinged seat, and the other end is connected to the second anti-collision ball;

[0019] A through groove is provided on one side of the armrest box frame close to the first anti-collision ball.

[0020] Optionally, a connecting arm is installed at one end of the handle passing through the armrest box, the connecting arm is installed on one side of the armrest box frame, and a gas spring is installed on the other side of the armrest box frame;

[0021] The piston rod of the gas spring is connected to the bottom plate of the armrest box.

[0022] Optionally, the deflection pilot handle includes a fixing seat mounted on the armrest box frame and a handle body connected to the fixing seat;

[0023] The handle body includes a split flange installed on a fixed seat, a valve body connected to the inside of the split flange and rotatably connected to the guide ring, a valve core assembly arranged on the valve body, a handle coupling passing through the valve core assembly and connected to the valve body, a shoulder structure installed in the valve body and connected to the lower end of the handle coupling, a rubber sleeve chuck nested on the valve body and compressed by the shoulder structure, and a dust cover mounted on the outside of the rubber sleeve chuck, the valve core assembly and the handle coupling.

[0024] Optionally, the split flange includes a first flange and a second flange, both of which are fixed on a fixing seat, the covering angle of the first flange is 210°, and the covering angle of the second flange is 150°;

[0025] The first flange and the second flange are respectively provided with guide grooves corresponding to the valve body on their inner sides, and the guide grooves are used to accommodate the guide rings so that the valve body and the guide rings are rotatably connected;

[0026] A limit seat is provided on the second flange, and a locking screw is inserted into the limit seat;

[0027] The locking screw passes through the limiting seat and abuts against the rubber sleeve chuck, and a locking pad is provided between the locking screw and the rubber sleeve chuck;

[0028] The edge of the rubber sleeve chuck is nested with the dust sleeve.

[0029] When adjusting the handle, loosen the locking screw, lift the locking washer from the rubber sleeve chuck, rotate the valve body, and the valve body rotates along the guide ring. When the handle and valve body are rotated to the correct angle, tighten the locking screw, and the locking washer contacts the rubber sleeve chuck, limiting the relative movement between the valve body and the flange.

[0030] Optionally, a limiting groove is provided on the leather case chuck, and the notch angle of the limiting groove is 30°;

[0031] The rubber sleeve chuck is pressed against the valve body by the shoulder structure of the handle coupling, forming an integral structure of the valve body, rubber sleeve chuck and handle coupling. When the rubber sleeve chuck rotates with the valve body relative to the second flange, the limit seat on the second flange is stopped by the limit groove to limit the maximum rotation angle of the rubber sleeve chuck, valve body and handle.

[0032] Optionally, the multi-dimensional adjustment bracket includes a mounting base connected to the armrest box frame, a telescopic tube plugged into the mounting base, and a buckle assembly sleeved on the telescopic tube;

[0033] The top of the telescopic tube is connected to the palm support surface;

[0034] The buckle assembly comprises a clamp surrounding the outside of the telescopic tube and a locking screw connected to the clamp.

[0035] In a second aspect, the present invention provides an adjustment method applicable to a small excavator, comprising:

[0036] Step 1: Pull the handle upwards, and the handle will drive the armrest box frame to rotate upwards, thereby exposing the positioning assembly;

[0037] Step 2: Pull the positioning assembly upward to separate the positioning assembly from the hood bottom plate assembly;

[0038] Step 3: Apply outward thrust to the first armrest box and the second armrest box respectively. At this time, the first armrest box and the second armrest box respectively deflect outward with the active shaft as the rotation center, and the passive shaft moves along the arc hole;

[0039] Step 4: After the first and second armrest boxes are swung outwards to their proper positions, loosen the positioning assembly and re-engage it with the positioning hole on the hood bottom plate assembly;

[0040] Step 5: If the deflection angles of the first and second armrest boxes are insufficient, continue to pull the positioning assembly upward and repeat the above steps to deflect the armrest boxes at multiple angles until the angle reaches a comfortable angle for the driver. Pull down the handle to return the armrest box frame to its original position.

[0041] Step 6: Deflect the pilot handle to the driver's comfort zone, then adjust the angle and height of the multi-dimensional adjustment bracket to adjust the palm rest to under the driver's arm.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. There is no need to remove the armrest box. Multiple positioning holes are set on the hood bottom plate assembly and a positioning component is set on the armrest box. By switching and coordinating the positioning component with the multiple positioning holes, the armrest box can be adjusted in multiple angles, thereby expanding the operating space.

[0044] 2. The deflection pilot handle can be adjusted within a range of 30° as the armrest box swings; the multi-dimensional adjustment bracket can be adjusted 360° and adjusted in height up and down as the armrest box swings; after the first and second armrest boxes are adjusted at multiple angles, the deflection pilot handle and multi-dimensional adjustment bracket can be used to adaptively adjust the handle and palm rest to meet the comfort of the operating space while also meeting the comfort adjustment requirements of the handle and palm rest.

[0045] 3. The structure is streamlined and compact, eliminating the need for complex disassembly procedures. The armrest frame and floor can be quickly separated and closed simply by operating the armrest handle, allowing the positioning components in the armrest to precisely face the driver, improving the convenience and efficiency of the driver's operation. A gas spring is installed between the armrest floor and the armrest frame as a buffer and energy storage component, greatly improving the stability of the armrest frame during flipping and achieving lightweight opening and closing, allowing the driver to operate it with one hand.

[0046] 4. When the small excavator moves to a narrow aisle or is transported, the positioning component can be connected to the vacant hole on the innermost side of the hood bottom plate assembly, so that the overall horizontal size of the small excavator is minimized, the operation is flexible, and the adaptability is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1Shown is an embodiment diagram of the present invention applicable to the adjustment mechanism of a small excavator;

[0048] Figure 2 Shown is a structural diagram of the adjustment mechanism of the present invention;

[0049] Figure 3 Shown is a side structural diagram of the adjustment mechanism of the present invention;

[0050] Figure 4 Shown is a structural diagram of the positioning assembly of the present invention;

[0051] Figure 5 Shown is a top view of the hood base plate assembly of the present invention;

[0052] Figure 6 Shown is a side view of the deflection pilot handle of the present invention;

[0053] Figure 7 Shown is a perspective view of a deflection pilot handle of the present invention;

[0054] Figure 8 Shown is a cross-sectional view of the deflection pilot handle of the present invention;

[0055] Figure 9 Shown is a top view of the valve core and split flange of the present invention;

[0056] Figure 10 Shown is a partial cross-sectional view of the split flange of the present invention;

[0057] Figure 11 Shown is a front view of the valve body of the present invention;

[0058] Figure 12 Shown is a schematic diagram of the installation of the multi-dimensional adjustable bracket and the hand rest of the present invention;

[0059] Figure 13 The figure shows an embodiment of the present invention applicable to the adjustment mechanism of a small excavator during transportation and passing through narrow aisles;

[0060] Figure 14 The figure shows an embodiment of the present invention applicable to the adjustment mechanism of a small excavator in a deflection state.

[0061] In the figure: 1-hood bottom plate assembly, 1-1-positioning hole, 1-2-rotation hole, 1-3-arc hole, 2-first armrest box, 2-1-handle, 2-2-first anti-collision ball, 2-3-positioning rod, 2-4-gas spring, 2-5-armrest box bottom plate, 2-6-armrest box frame, 2-7-armrest box shell, 2-8-driving shaft, 2-9-circlip, 2-10-passive shaft, 2-11-positioning seat, 2-12-spring, 2-13-second anti-collision ball, 3-second armrest box, 4-first deflection pilot handle, 4-1-fixed seat, 4-2-handle body, 4-2-1-handle connecting shaft, 4-2-2- Dust cover, 4-2-3-first flange, 4-2-4-guide ring, 4-2-5-second flange, 4-2-6-valve body, 4-2-7-locking washer, 4-2-8-locking screw, 4-2-9-valve core assembly, 4-2-10-guide groove, 4-2-11-rubber sleeve chuck, 5-second deflection pilot handle, 6-seat, 7-1-hand support surface, 7-2-telescopic tube, 7-3-clip assembly, 7-4-mounting seat. DETAILED DESCRIPTION

[0062] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0063] Example 1

[0064] This embodiment provides an adjustment mechanism suitable for small excavators, such as Figure 1 、 Figure 13 and Figure 14 The figure includes: a yaw armrest box, a deflection pilot handle and a multi-dimensional adjustment bracket, wherein the yaw armrest box includes a first armrest box 2 and a second armrest box 3 installed on the hood bottom plate assembly 1; the deflection pilot handle includes a first deflection pilot handle 4 and a second deflection pilot handle 5, and the first deflection pilot handle 4 and the second deflection pilot handle 5 are respectively installed on the first armrest box 2 and the second armrest box 3; there are also two multi-dimensional adjustment brackets, which are respectively connected between the first armrest box 2 and the second armrest box 3 and their respective hand rests; after the first armrest box 2 and the second armrest box 3 are adjusted at multiple angles, the handle and the hand rest are adaptively adjusted through the deflection pilot handle and the multi-dimensional adjustment bracket to meet the comfort of operation between the seat 6 and the two armrest boxes, while meeting the comfort adjustment of the handle and the hand rest.

[0065] like Figure 2 and Figure 3The first armrest box 2 and the second armrest box 3 shown in the figure both include: an armrest box bottom plate 2-5, a positioning assembly, an armrest box frame 2-6, a handle 2-1, a driving shaft 2-8, a passive shaft 2-10 and an armrest box shell 2-7; the armrest box bottom plate 2-5 is mounted on the hood bottom plate assembly 1, and is movably connected to the hood bottom plate assembly 1 through the positioning assembly, the driving shaft 2-8 and the passive shaft 2-10, the positioning assembly and the armrest box frame 2-6 are both mounted on the armrest box bottom plate 2-5, and the handle 2-1 is connected to the armrest box frame 2-6, the active shaft 2-8 and the passive shaft 2-10 are respectively connected to the bottom of the armrest box bottom plate 2-5 and are movably connected to the hood bottom plate assembly 1; the bottom of the active shaft 2-8 and the passive shaft 2-10 are fixed to the hood bottom plate assembly 1 by bottom bolts, and the bottom bolts are connected to the active shaft 2-8 and the passive shaft 2-10 by retaining springs 2-9. Grease the upper side of the retaining spring 2-9 to reduce the resistance of the active shaft 2-8 and the passive shaft 2-10 when they move.

[0066] like Figure 5 The hood base assembly 1 shown is provided with a positioning hole 1-1, a circular rotating hole 1-2 and an arc hole 1-3, which are used to cooperate with the positioning component, the active shaft 2-8 and the passive shaft 2-10 respectively; there are multiple positioning holes 1-1, and the multiple positioning holes 1-1 are arranged from the inside to the outside along the hood base assembly 1, and the arrangement trajectory of the multiple positioning holes 1-1 is arc-shaped, corresponding to the armrest box swing route; thereby, the first armrest box 2 and the second armrest box 3 can be positioned at multiple angles relative to the hood base assembly 1.

[0067] The armrest box shell 2-7 is installed on the armrest box frame 2-6 and wraps the armrest box frame 2-6 and internal components. It protects the various components inside the armrest box and creates an aesthetic effect as the armrest box frame 2-6 turns up and down or swings left and right.

[0068] In this embodiment, the positioning component cooperates with the corresponding structure on the hood bottom plate assembly 1, and when the positioning component is disengaged from the hood bottom plate assembly 1, the first armrest box 2 and the second armrest box 3 can use the active shaft 2-8 and the rotating hole 1-2 as the rotation point, so that the passive shaft 2-10 can move along the arc hole 1-3 of the hood bottom plate assembly 1. At the same time, through the active connection and sliding connection between the active shaft 2-8 and the passive shaft 2-10 and the hood bottom plate assembly 1, it can provide balanced support for the first armrest box 2 and the second armrest box 3 when they are deflected, prevent the armrest box from tilting or shaking, and guide the positioning component to a certain extent, thereby improving the accuracy and stability of switching of multiple positioning holes 1-1.

[0069] Optional, such as Figure 2 and Figure 3As shown, the first armrest box 2 and the second armrest box 3 also include a limiting component, which includes a first anti-collision ball 2-2 and a second anti-collision ball 2-13; the first anti-collision ball 2-2 is installed on the armrest box frame 2-6, and the second anti-collision ball 2-13 is installed on the armrest box bottom plate 2-5; the first anti-collision ball 2-2 is close to the front end of the armrest box bottom plate 2-5, and the second anti-collision ball 2-13 is arranged at the rear end of the armrest box bottom plate 2-5 and faces close to the armrest box frame 2-6. When the armrest box frame 2-6 is flipped up and down, the first anti-collision ball 2-2 and the second anti-collision ball 2-13 can respectively limit the armrest box frame 2-6 forward and backward, so as to avoid the armrest box frame 2-6 from squeezing the armrest box bottom plate 2-5 for a long time and deforming, thereby affecting the deflection function.

[0070] Optional, such as Figure 4 The shown positioning assembly includes a positioning seat 2-11, a spring 2-12 and a positioning rod 2-3. The positioning seat 2-11 is installed on the armrest box bottom plate 2-5, and the spring 2-12 is installed in the positioning seat 2-11. The positioning rod 2-3 passes through the spring 2-12, the positioning seat 2-11 and the armrest box bottom plate 2-5 and corresponds to the positioning hole 1-1 of the hood bottom plate assembly 1; the positioning seat 2-11 is a hollow structure, and a stop groove is provided inside to limit the spring 2-12; the positioning rod 2-3 is a conical structure at one end close to the positioning hole 1-1, and the other end is spherical. The spherical shape can facilitate the driver's taking and placing. At the same time, the diameter of the spherical end is larger than the diameter of the positioning seat 2-11, and can apply part of the gravity to the spring 2-12. When the positioning rod 2-3 is plugged into the positioning hole 1-1, the stability of the connection of the positioning assembly is guaranteed. This embodiment is not limited to the spherical end, and can also involve other shapes, such as diamond.

[0071] Optional, such as Figure 3 One end of the armrest box frame 2-6 is mounted on the armrest box bottom plate 2-5 through a hinged seat, and the other end is connected to the second anti-collision ball 2-13;

[0072] The armrest box frame 2-6 and the armrest box shell 2-7 are provided with a through groove on one side close to the first anti-collision ball 2-2, which can prevent the armrest box frame 2-6 from colliding and deforming with the first anti-collision ball 2-2 when it is turned over, thereby extending the life of the equipment.

[0073] Optional, such as Figure 2 The handle 2-1 shown is passed through one end of the armrest box and is installed with a connecting arm, which is installed on one side of the armrest box frame 2-6, and a gas spring 2-4 is installed on the other side of the armrest box frame 2-6, and the piston rod of the gas spring 2-4 is connected to the armrest box bottom plate 2-5.

[0074] In this embodiment, the gas spring 2-4 is linked with the armrest box frame 2-6. When the armrest box frame 2-6 flips upward, the gas spring 2-4 extends upward to cushion the impact force of the armrest box frame 2-6 flipping upward. When the armrest box frame 2-6 flips downward, the gas spring 2-4 is compressed downward to absorb the downward force of the armrest box frame 2-6 and gravity, playing a damping role to smoothly control the up and down flipping movement of the armrest box frame 2-6 and realize lightweight opening and closing, so that the driver can operate it with one hand, reducing the difficulty of operation.

[0075] Optional, such as Figures 6 to 11 As shown, the deflection pilot handle includes a handle body 4-2 and a fixing seat 4-1; the fixing seat 4-1 is installed on the armrest box frame 2-6, and the handle body 4-2 is connected to the fixing seat 4-1; Figure 7 and Figure 8 The handle body 4-2 shown in the figure includes: a split flange, a valve body 4-2-6, a valve core assembly 4-2-9, a handle shaft 4-2-1, a rubber sleeve chuck 4-2-11, a shaft shoulder structure and a dust cover 4-2-2; the split flange is installed on the fixed seat 4-1, and the split flange is rotatably connected to the outside of the valve body 4-2-6 through the guide ring 4-2-4, the valve core assembly 4-2-9 is installed on the valve body 4-2-6, and the handle shaft 4-2-1 is screwed into the valve core assembly 4-2-9 and the valve body 4-2-6. The shoulder structure is installed in the valve body 4-2-6 and connected to the lower end of the handle coupling 4-2-1. The rubber sleeve chuck 4-2-11 is nested on the valve body 4-2-6 and pressed against the valve body 4-2-6 through the shoulder structure. The dust cover 4-2-2 is mounted on the end of the handle coupling 4-2-1, the valve core assembly 4-2-9 and the outer side of the rubber sleeve chuck 4-2-11.

[0076] In this embodiment, the fixed seat 4-1 serves as a structural base and is fixed to the armrest box frame 2-6 by bolts. The armrest box frame 2-6 provides overall stability. The split flange is mounted on the outside of the valve body 4-2-6 and connected to the fixed seat 4-1 by bolts, forming a rigid support system with the fixed seat 4-1 to ensure the position accuracy of the split flange and the valve body 4-2-6 under complex working conditions, and to achieve axial and circumferential fixation of the split flange to prevent its axial movement. The split design of the split flange also facilitates the installation and maintenance of the valve body 4-2-6. During maintenance, there is no need to remove the fixed seat 4-1, only the corresponding side flange, thereby shortening the maintenance time. The valve body 4-2-6 achieves low-friction rotation with the split flange through the guide ring 4-2-4. By operating the handle, the valve core opens the control fluid passage, realizing the output of the pilot control oil signal.

[0077] The handle coupling 4-2-1 is connected to the valve core assembly 4-2-9 and the valve body 4-2-6 through threads. Among them, the valve core assembly 4-2-9 and the valve body 4-2-6 are both provided with internal threads, and the handle coupling 4-2-1 is provided with external threads on the shoulder structure at one end and the lower end corresponding to the valve core assembly 4-2-9, so that the handle coupling 4-2-1 is connected with the valve core assembly 4-2-9 and the valve body 4-2-6 to transmit the operating force to the valve core assembly 4-2-9 and the valve body 4-2-6 to drive the valve core to move; the rubber sleeve chuck 4-2-11 is pressed against the valve body 4-2-6 by the shoulder structure to prevent dust from entering. The rubber sleeve chuck 4-2-11 cooperates with the flange stop to limit the rotation angle of the handle and improve the safety of operation; the dust cover 4-2-2 extends from the edge of the rubber sleeve chuck 4-2-11 to the uppermost end of the handle coupling 4-2-1, forming a sealed cavity to prevent dust and water vapor from entering the handle body 4-2 and affecting its operating accuracy and extending the life of the equipment.

[0078] Optional, such as Figure 10 and Figure 11 As shown, the first flange 4-2-3 and the second flange 4-2-5 are respectively provided with guide grooves 4-2-10 corresponding to the valve body 4-2-6. The guide grooves 4-2-10 are used to accommodate the guide rings 4-2-4. The valve body 4-2-6 can rotate a certain angle along the guide rings 4-2-4. The second flange 4-2-5 is provided with a limit seat. The limit seat is plugged with a locking screw 4-2-8. The locking screw 4-2-8 passes through The limit seat is in contact with the rubber sleeve chuck 4-2-11, and a locking pad 4-2-7 is provided between the locking screw 4-2-8 and the rubber sleeve chuck 4-2-11; the rubber sleeve chuck 4-2-11 is pressed against the valve body 4-2-6 by the shoulder structure of the handle coupling 4-2-1, so that the valve body 4-2-6, the rubber sleeve chuck 4-2-11 and the handle coupling 4-2-1 are connected as one, and the dust cover 4-2-2 can be nested on the edge of the leather sleeve chuck.

[0079] In this embodiment, when adjusting the handle rotation, the locking screw 4-2-8 is loosened, the locking washer 4-2-7 is lifted from the rubber sleeve chuck 4-2-11, and the valve body 4-2-6 is rotated. The valve body 4-2-6 then rotates along the guide ring 4-2-4. When the handle valve body 4-2-6 is rotated into position, the locking screw 4-2-8 is tightened. The locking washer 4-2-7 contacts the rubber sleeve chuck 4-2-11, increasing friction and limiting relative motion between the valve body 4-2-6 and the flange. The guide ring 4-2-4 forms a revolving pair, enabling flexible rotation of the valve body 4-2-6. At the same time, the limit seat and locking screw 4-2-8 on the second flange 4-2-5 effectively limit and lock the rubber sleeve chuck 4-2-11, ensuring the stability of the overall structure.

[0080] like Figure 8 and Figure 9As shown, the rubber sleeve chuck 4-2-11 is provided with a limiting groove. Figure 9 Point A in the middle is the notch angle of the limit groove, and in this embodiment the notch angle is 30°; the rubber sleeve chuck 4-2-11 is pressed against the valve body 4-2-6 by the shoulder structure of the handle coupling 4-2-1, forming an integral structure of the valve body 4-2-6, the rubber sleeve chuck 4-2-11 and the handle coupling 4-2-1. When the rubber sleeve chuck 4-2-11 rotates with the valve body 4-2-6 relative to the second flange 4-2-5, the limit seat on the second flange 4-2-5 is stopped by the limit groove to limit the maximum rotation angle of the rubber sleeve chuck 4-2-11, the valve body 4-2-6 and the handle. At the same time, the deflection adjustment within the range of 30° can be performed after the armrest box deflects, ensuring that the equipment operates within a safe and controllable range while having the adjustment to meet the comfort of the handle.

[0081] Optional, such as Figure 12 The multi-dimensional adjustment bracket shown in the figure includes: a mounting seat 7-4, a telescopic tube 7-2 and a snap assembly 7-3; the mounting seat 7-4 is connected to the armrest box frame 2-6, the telescopic tube 7-2 is plugged into the mounting seat 7-4, and the snap assembly 7-3 is sleeved on the telescopic tube 7-2; the top of the telescopic tube 7-2 is connected to the palm support surface 7-1; the telescopic tube 7-2 is two hollow through tubes connected in a sliding manner, the through tube with a larger diameter is connected to the armrest box frame 2-6 through the mounting seat 7-4, and passes through the armrest box shell 2-7 and is installed on the armrest box, the through tube with a smaller diameter is connected to the palm support surface 7-1, and the snap assembly 7-3 is installed At the connection point of the two through tubes, a rectangular notch is provided on the through tube with a larger diameter, which is used for the clip assembly 7-3 to adjust the tightness between the two through tubes; the clip assembly 7-3 is a combination of a clamp and a locking screw, the clamp surrounds the outside of the telescopic tube 7-2, and the locking screw is connected to the clamp; a wrench is connected to one end of the locking screw to adjust the tightness of the clamp. When the angle and height of the hand rest need to be adjusted, the locking screw is used to loosen the clamp by the action of the wrench, so that the through tube connected to the hand rest can be rotated and adjusted in height until it is adjusted to the angle that the driver is satisfied with, and then the locking screw is re-acted to limit the telescopic tube 7-2. This embodiment can adapt to the height and body shape of different drivers. Figure 13 and Figure 14 As shown, the deflection adjustment of the armrest box is performed, and the connection between the locking screw and the wrench allows the adjustment of the telescopic tube 7-2 to be operated with one hand. After the armrest box is deflected, the adjustment can be performed to meet the comfort of the palm rest without the help of disassembly tools.

[0082] Example 2

[0083] This embodiment discloses an adjustment method applicable to a small excavator, comprising:

[0084] Step 1: Pull the handle upward, and the handle will drive the armrest box frame and armrest box shell to rotate upward, so that the positioning assembly is exposed to face the driver.

[0085] Step 2: The driver pulls the positioning rod upward, and the tension compresses the spring. At the same time, the tension causes the conical structure to separate from the innermost positioning hole of the hood bottom plate assembly to the top of the armrest box bottom plate, separating the positioning component and the hood bottom plate assembly; the armrest box bottom plate and the hood bottom plate assembly are in a movable connection state.

[0086] Step 3: The driver applies outward thrust to the first armrest box and the second armrest box respectively according to his body shape. At this time, the first armrest box and the second armrest box respectively deflect outward with the driving shaft as the rotation center, and the driven shaft moves along the arc hole.

[0087] Step 4: After the first armrest box and the second armrest box are swung outward to the appropriate positioning hole positions, the driver releases the positioning rod, the spring releases the compressed elastic force and the positioning rod is driven by its own gravity to quickly fall down and re-connect with the outer positioning hole. The armrest box bottom plate and the hood bottom plate assembly are fixedly connected. Finally, the first armrest box and the second armrest box can be positioned in the swung position through the positioning component.

[0088] Step 5: If the driver feels that the deflection angles of the first and second armrest boxes are not enough, continue to pull the positioning rod upward and repeat steps 2 to 4 to perform multi-angle deflection adjustments until the entire armrest box is deflected to a comfortable angle for the driver. Pull down the handle to flip the armrest box frame downward, driving the armrest box shell and the armrest box bottom plate to close;

[0089] Step 6: After the position of the armrest box is adjusted, the driver deflects the pilot handle to the driver's comfort zone, then uses the wrench to release the limit of the telescopic tube from the buckle assembly, adjusts the angle and height of the palm rest until the palm rest is adjusted to the comfort zone under the driver's arm, and then locks the buckle assembly with the wrench.

[0090] To sum up, the present invention does not need to cancel the armrest box. A plurality of positioning holes are set on the hood bottom plate assembly and a positioning component is set on the armrest box. By switching and coordinating the positioning component with the plurality of positioning holes, the armrest box can be adjusted at multiple angles, thereby achieving the purpose of expanding the operating space.

[0091] The deflection pilot handle can be adjusted within a range of 30° as the armrest box swings; the multi-dimensional adjustment bracket can be adjusted 360° in rotation and up and down in height as the armrest box swings; after the first armrest box and the second armrest box are adjusted at multiple angles, the handle and palm rest can be adaptively adjusted through the deflection pilot handle and the multi-dimensional adjustment bracket to meet the comfort of the operating space while meeting the comfort adjustment of the handle and palm rest.

[0092] The structure is simple and compact, and no complicated disassembly process is required. The armrest box frame and the armrest box floor can be quickly separated and closed only by acting on the armrest box handle, so that the positioning assembly faces the driver. A gas spring is arranged between the armrest box floor and the armrest box frame as a buffer and energy storage component, which greatly improves the stability and life of the opening and closing of the armrest box frame.

[0093] When the small excavator moves into a narrow aisle or is transported, the positioning component can be connected to the vacant hole on the innermost side of the hood bottom plate assembly, so that the overall lateral size of the small excavator is minimized, the operation is flexible, and the adaptability is wide.

[0094] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. An adjustment mechanism suitable for a small excavator, characterized in that: include: The yaw armrest box includes a first armrest box and a second armrest box mounted on the hood bottom plate assembly, and the first armrest box and the second armrest box are both connected to a hand rest; Deflection pilot handles are mounted on the first armrest box and the second armrest box respectively; A multi-dimensional adjustable bracket connected between the first armrest box, the second armrest box and the hand rest; The first and second armrest boxes each include an armrest box bottom plate, a positioning assembly and an armrest box frame respectively mounted on the armrest box bottom plate, a handle connected to the armrest box frame, and a driving shaft and a driven shaft respectively connected to the bottom of the armrest box bottom plate and plugged into the hood bottom plate assembly; The hood bottom plate assembly is provided with a positioning hole, a rotation hole and an arc hole for respectively cooperating with the positioning component, the driving shaft and the driven shaft; There are multiple positioning holes, and the multiple positioning holes are arranged from the inside to the outside along the hood bottom plate assembly, so that the first armrest box and the second armrest box can be positioned at multiple angles relative to the hood bottom plate assembly; The deflection pilot handle includes a fixing seat mounted on the armrest box frame and a handle body connected to the fixing seat; The handle body includes a split flange mounted on a fixed seat, a valve body connected to the inside of the split flange and rotatably connected to the guide ring, a valve core assembly provided on the valve body, a handle coupling passing through the valve core assembly and connected to the valve body, a shoulder structure installed in the valve body and connected to the lower end of the handle coupling, a rubber sleeve chuck nested on the valve body and compressed by the shoulder structure, and a dust cover sleeved on the outside of the rubber sleeve chuck, the valve core assembly and the handle coupling; The multi-dimensional adjustment bracket includes a mounting base connected to the armrest box frame, a telescopic tube plugged into the mounting base, and a buckle assembly sleeved on the telescopic tube; The top of the telescopic tube is connected to the palm support surface; The buckle assembly comprises a clamp surrounding the outside of the telescopic tube and a locking screw connected to the clamp.

2. The adjustment mechanism for a small excavator according to claim 1, characterized in that: The first and second armrest boxes further include a limiting assembly, wherein the limiting assembly includes a first anti-collision ball mounted on the armrest box frame and a second anti-collision ball mounted on the armrest box bottom plate; The first anti-collision ball is close to the front end of the armrest box bottom plate, and the second anti-collision ball is connected to the rear end of the armrest box bottom plate and close to the armrest box frame.

3. The adjustment mechanism for a small excavator according to claim 1, characterized in that: The positioning assembly includes a positioning seat installed on the armrest box bottom plate, a spring installed in the positioning seat, and a positioning rod passing through the spring, the positioning seat and the armrest box bottom plate; The positioning seat is a hollow structure with a stop groove inside for limiting the position of the spring; One end of the positioning rod close to the positioning hole is a conical structure, and the other end is a spherical structure.

4. The adjustment mechanism for a small excavator according to claim 1, characterized in that: One end of the armrest box frame is mounted on the armrest box bottom plate through a hinged seat, and the other end is connected to the second anti-collision ball; A through groove is provided on one side of the armrest box frame close to the first anti-collision ball.

5. The adjustment mechanism for a small excavator according to claim 1, characterized in that: A connecting arm is installed at one end of the handle passing through the armrest box, the connecting arm is installed on one side of the armrest box frame, and a gas spring is installed on the other side of the armrest box frame; The piston rod of the gas spring is connected to the bottom plate of the armrest box.

6. The adjustment mechanism for a small excavator according to claim 1, characterized in that: The split flange includes a first flange and a second flange, both of which are fixed on a fixing seat, the covering angle of the first flange is 210°, and the covering angle of the second flange is 150°; The first flange and the second flange are respectively provided with guide grooves corresponding to the valve body on their inner sides, and the guide grooves are used to accommodate the guide rings so that the valve body and the guide rings are rotatably connected; A limit seat is provided on the second flange, and a locking screw is inserted into the limit seat; The locking screw passes through the limiting seat and abuts against the rubber sleeve chuck, and a locking pad is provided between the locking screw and the rubber sleeve chuck; The edge of the rubber sleeve chuck is nested with the dust sleeve.

7. The adjustment mechanism for a small excavator according to claim 1, characterized in that: A limit groove is provided on the rubber sleeve chuck, and the groove angle of the limit groove is 30°. When the rubber sleeve chuck rotates with the valve body relative to the second flange, the limit seat on the second flange is blocked by the limit groove to limit the maximum rotation angle of the rubber sleeve chuck, valve body and handle.

8. A method for adjusting a small excavator, characterized in that: The adjustment mechanism for a small excavator according to any one of claims 1 to 7 comprises: Pull the handle upwards, and the handle drives the armrest box frame to rotate upwards, thereby exposing the positioning assembly; Pull the positioning assembly upward to separate the positioning assembly from the hood bottom plate assembly; Apply outward thrust to the first armrest box and the second armrest box respectively, and then the first armrest box and the second armrest box deflect outward with the driving shaft as the rotation center, and the driven shaft moves along the arc hole; After the first armrest box and the second armrest box are respectively swung outward to their proper positions, the positioning assembly is released so that the positioning assembly is re-engaged with the positioning hole on the hood bottom plate assembly; If the deflection angles of the first and second armrest boxes are not enough, continue to pull the positioning assembly upwards and repeat the above steps to deflect them at multiple angles until they reach a comfortable angle for the driver, then pull the handle down to return the armrest box frame to its original position. Act on the deflection pilot handle to deflect the handle to the driver's comfort zone, then adjust the angle and height of the multi-dimensional adjustment bracket to adjust the palm rest to under the driver's arm.

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