A hole digger

Abstract

The present invention provides a hole digger including a mud excavation container and a mud excavation device; the mud excavation device includes a rotating seat and a rotating shaft, which is rotatably connected to the rotating seat; the mud excavation device also includes an elastic member, a gear, a first limiting assembly, and a second limiting assembly, which are sequentially arranged in abutment with each other along the axial direction of the rotating shaft in the rotating seat; the gear and the second limiting assembly rotate coaxially with the rotating shaft, the first limiting assembly is rotatable relative to the rotating shaft, and the second limiting assembly limits the first limiting assembly from the axial direction of the rotating shaft; the first limiting assembly and the gear are both movable in the axial direction; when the second limiting assembly rotates in the first rotation direction to the second mating position, the second limiting assembly releases the axial restriction on the first limiting assembly, and the gear is pushed axially to a meshing position to mesh with a gear rod under the action of the elastic member. When the hole digger of the present invention is excavating mud, it only needs to swing the rocker upward to drive the gear from the disengaged position to the meshing position, and the gear drives the gear rod to move downward, which is simple to operate and has high digging efficiency and mud excavation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of golf course hole digging equipment, in particular to a hole digger. Background Art

[0002] An existing hole digger includes a sleeve, a push rod assembly, a hole digging container, a mud backing assembly, and a hammer head. The sleeve has two extended ends fixedly connected to a handle and a hammer head, respectively. The hammer head has a first through hole extending vertically, and the extended end of the sleeve is located in the first through hole. The hole digging container has a second through hole extending vertically. The push rod assembly is arranged inside the sleeve and extends through the first through hole and the second through hole in sequence from top to bottom. One extended end of the push rod assembly extends into the hole digging container. The mud backing plate is located in the hole digging container. The push rod assembly is fixedly connected to the mud backing plate. The mud backing assembly is located in the middle of the extended sleeve. The mud backing assembly includes a rocker, a rotating shaft, and a gear. The gear is fixedly connected to the outer periphery of the rotating shaft. The rocker can drive the rotating shaft to rotate, and the rotating shaft drives the gear to rotate. Pulling the rocker along the axis of the rotating shaft can drive the gear to move along the axial direction of the rotating shaft between a separation position and an engagement position. The push rod assembly includes a gear rod. When the gear is in the engagement position, the gear meshes with the gear rod. When the gear is in the separation position, the gear and the gear rod are released. When using the hole digger to dig a new hole, the gear remains in the disengaged position, and the handle is pulled upward to drive the casing, mud withdrawal assembly, and hammer head to move upward relative to the push rod assembly and the digging container to a certain height. When the hammer head moves upward to a certain height, the handle is released, and the hammer head hammers the digging container downward under the action of the power. The hammer head hammers the digging container multiple times, and the digging container is hammered into the ground to a certain depth before being pulled out to complete the digging. After using the hole digger to dig a new hole, the soil remaining in the digging container needs to be removed from the digging container and filled into the old hole. When filling the old hole, first insert the digging container containing soil into the old hole, and then pull the rocker along the axial direction of the rotating shaft. The rocker drives the gear to move along the axial direction of the rotating shaft from the disengaged position to the engaged position. When the gear moves to the engaged position, the rocker is swung upward to drive the gear to rotate through the rotating shaft. The gear and the teeth cooperate to drive the push rod assembly to move downward relative to the digging container to withdraw the soil from the digging container.

[0003] When using this existing hole digger to dig holes, the gears need to be kept in the disengaged position, and when withdrawing mud, the gears need to be kept in the engaged position. When switching between the hole digging function and the mud withdrawing function, the rocker must first be pulled along the axial direction of the rotating shaft to drive the gears to switch between the disengaged position and the engaged position. The operation steps are cumbersome and the hole digging efficiency and mud withdrawing efficiency are low. Summary of the Invention

[0004] The object of the present invention is to provide a digging tool which is easy to operate and has high digging efficiency and mud removal efficiency.

[0005] To achieve the above-mentioned objectives, the present invention provides a hole digging tool comprising a dredging container and a dredging device; the dredging device comprises a rotating seat, a rotating shaft, a dredging plate, a push rod assembly and a gear, the dredging plate is located in the dredging container, the push rod assembly is connected to the dredging plate, and the push rod assembly comprises a gear rod; the rotating shaft is rotatably connected to the rotating seat; the rotating shaft can drive the gear to rotate around the axis of the rotating shaft, and the gear and the gear rod cooperate to drive the push rod assembly to move downward; the dredging device also comprises an elastic member disposed in the rotating seat, a first limiting assembly and a second limiting assembly; the second limiting assembly rotates coaxially with the rotating shaft; the first limiting assembly is rotatable relative to the rotating shaft, and the second limiting assembly limits the first limiting assembly axially from the rotating shaft; the first limiting assembly and the gear are both movable in the axial direction; the elastic member, the gear, the first limiting assembly and the second limiting assembly are sequentially abutted in the axial direction; when the second limiting assembly rotates in the first rotation direction to the second mating position, the second limiting assembly releases the axial restriction on the first limiting assembly, and the gear can be pushed axially to the meshing position under the action of the elastic member, and the gear in the meshing position meshes with the gear rod.

[0006] It can be seen from the above scheme that in the initial state, in the axial direction, the second limit assembly is limited and matched with the first limit assembly, the gear is separated from the tooth rod, the mud withdrawal assembly and the hammer head can move vertically relative to the push rod assembly at the same time, and the hole digger can realize the hole digging action; when the soil in the hole digging container needs to be withdrawn from the hole digging container and filled into the old hole, it is only necessary to swing the rocker bar upwards to drive the second limit assembly to rotate along the first rotation direction to the second matching position through the rotating shaft, and the second limit assembly releases the axial restriction of the first limit assembly, and the gear is pushed axially to the meshing position under the action of the elastic member, and the gear is meshed with the tooth rod and drives the tooth rod to move downward to push out the soil in the mud digging container; the hole digger of the present invention does not require other operations when withdrawing mud, and it only needs to swing the rocker bar upwards to drive the gear from the separation position to the meshing position, which reduces the operating steps and improves the hole digging efficiency and mud withdrawal efficiency.

[0007] Further according to the above scheme, the first limiting assembly includes a first limiting member; the second limiting assembly includes a second limiting member; in the axial direction, the second limiting member is limitedly matched with the first limiting member; the first limiting member includes a limiting matching surface; in the axial direction, the limiting matching surface is opposite to the second limiting member, and the second limiting member abuts the limiting matching surface; the limiting matching surface extends in a direction inclined to the first rotation direction and gradually moves away from the second limiting member in the axial direction.

[0008] It can be seen that the limit matching surface extends in a direction inclined to the first rotation direction and gradually moves away from the second limit member in the axial direction. When the second limit member rotates around the rotating shaft in the first rotation direction, the first limit component in the axial direction moves in a direction gradually approaching the second limit component. During the movement of the first limit component, the limit matching surface remains matched with the second limit member, and the movement speed of the first limit component is stable and controllable; when the rotating shaft drives the second limit member to rotate around the rotating shaft in the second rotation direction, the setting of the limit matching surface enables the second limit member to push the first limit component back to the initial position, and then the first limit component drives the gear back to the separation position.

[0009] According to the above solution, further, the second limiting member includes a roller, which is rotatable around the second axis, and the roller is engaged with the limiting matching surface in a rolling friction manner.

[0010] It can be seen from this that the second limiting member and the limiting matching surface are matched with each other in rolling friction, the friction coefficient is smaller, and the mud removal device runs more smoothly.

[0011] According to the above solution, further, the second limiting member and the limiting matching surface are in line contact.

[0012] It can be seen from this that the matching relationship between the second limiting member and the limiting matching surface in line contact is more stable and reliable than the matching relationship between the second limiting member and the limiting matching surface in point contact.

[0013] According to the above scheme, the gear further includes a one-way transmission gear; the rotating shaft drives the one-way transmission gear to rotate coaxially along the first rotation direction; when the rotating shaft rotates along the second rotation direction, the one-way transmission gear rotates relative to the rotating shaft along the first rotation direction; the second rotation direction is opposite to the first rotation direction.

[0014] As can be seen from this, when the shaft rotates in the first direction, it can drive the one-way transmission gear to rotate in the first direction. When the shaft rotates in the second direction, the one-way transmission gear remains stationary. When the shaft rotates alternately in the first and second directions, the shaft only drives the one-way transmission gear to rotate in the first direction, thereby driving the gear rod to continuously move downward. Therefore, when the one-way transmission gear is set, when repeatedly using the excavator to remove mud, the operator only needs to repeatedly swing the swing arm up and down to drive the shaft to rotate alternately in the first and second directions, thereby driving the one-way transmission gear to intermittently rotate in the first direction multiple times, avoiding tedious operations and making work easier.

[0015] According to the above scheme, the rotating seat further includes a slide groove, which is located on the inner periphery of the rotating seat and extends along the axial direction of the rotating shaft; the first limiting component includes a sliding member; along the radial direction of the rotating shaft, the first limiting member, the sliding member and the slide groove are arranged in sequence, and the sliding member is in the slide groove; in the circumferential direction of the rotating shaft, the sliding member and the rotating seat are limited and matched.

[0016] It can be seen that in the rotation direction of the rotating shaft, the sliding member and the rotating seat are limited in cooperation, and the first limiting component can remain stationary relative to the rotating shaft; the sliding member is in the sliding groove, and the first limiting component can only move along the circumferential direction; in the axial direction, a stable limiting cooperation is formed between the first limiting component and the second limiting component.

[0017] According to the above solution, further, the first limiting member includes a sliding member installation position, and the sliding member is located in the sliding member installation position; the sliding member is a ball.

[0018] It can be seen that the first limit member includes a sliding member mounting position, and the sliding member is located in the sliding member mounting position; the sliding member is a ball, and the ball can roll in the sliding member mounting position, and the ball can also roll in the slide groove. When the first limit member moves axially in the slide groove, the friction resistance is smaller and the movement is smoother.

[0019] According to the above solution, the installation position of the sliding member is further in the shape of a spherical crown; and the inner surface of the sliding groove is an arc surface.

[0020] It can be seen that the spherical crown-shaped sliding part installation position and the sliding groove with an arc inner surface have a larger contact area with the ball, and the fit is more stable.

[0021] According to the above solution, the mud-removing device further includes a plane bearing; along the axial direction, the first limit member, the second limit member and the plane bearing are arranged in sequence, and the plane bearing is located between the second limit member and the rotating seat.

[0022] It can be seen from this that the first limiting assembly rotates relative to the rotating seat, and the planar bearing is located between the second limiting assembly and the rotating seat to reduce the relative rotation resistance between the two.

[0023] According to the above solution, the hole digger includes an outer tube and a third limiting member, and the push rod assembly and the third limiting member are both located inside the outer tube; the push rod assembly includes a limiting portion, and in the vertical direction, the limiting portion and the third limiting member are limitedly matched.

[0024] It can be seen from this that the limiting portion cooperates with the third limiting member to limit the vertical movement stroke of the push rod assembly in the outer tube and prevent the push rod assembly from moving excessively. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 2 is a structural diagram of an embodiment of a hole digging device of the present invention.

[0026] Figure 2 2. It is an exploded view of the mud-removing device of the excavator embodiment of the present invention.

[0027] Figure 3 FIG. 1 is a partial structural diagram of a mud-removing device in a first state of an embodiment of a hole digging tool according to the present invention.

[0028] Figure 4 FIG. 1 is a partial structural diagram of the mud-removing device in the second state of the excavator embodiment of the present invention.

[0029] Figure 5 1 is a first cross-sectional view of the mud-removing device of the excavator embodiment of the present invention.

[0030] Figure 6 2 is a structural diagram of a first position-limiting assembly and a second position-limiting assembly of an embodiment of a hole digging tool of the present invention.

[0031] Figure 7 2 is a structural diagram of a rotating base of an embodiment of a hole digging tool of the present invention.

[0032] Figure 8 2 is a second cross-sectional view of the mud-removing device of the excavator embodiment of the present invention.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0034] See also Figure 1 and Figure 5 The digging tool provided in this embodiment includes a handle 1, an outer tube 2, a mud removal device 3, a hammer head 4, a buffer pad 5, a mud digging container 6, a second inner tube 7, a first bushing 8, a second bushing 9, a first spring 10, an indexing pin 11, a level 12 and a lock assembly 13.

[0035] The handle 1 and the hammer head 4 are respectively fixedly connected to the extended ends of the outer tube 2. The hammer head 4 has a first through hole 401. The first through hole 401 is located at the center of the hammer head 4. The first through hole 401 passes through the hammer head 4 from top to bottom. The sleeve 2 is located in the first through hole 401.

[0036] See also Figure 5 The second inner tube 7 is located inside the outer tube 2 and at the lower part of the outer tube 2. The second inner tube 7 includes a first annular recess 701 and a second annular recess 702. The first annular recess 701 is recessed in the inner wall of the second inner tube 7 along the radial direction of the second inner tube 7. The first annular recess 701 is located at the upper part of the second inner tube 7 and extends upward to the extended end of the second inner tube 7. The second annular recess 702 is recessed in the inner wall of the second inner tube 7 along the radial direction of the second inner tube 7. The second annular recess 702 is located at the lower part of the second inner tube 7 and extends downward to the extended end of the second inner tube 7. From top to bottom, the first spring 10 and the first bushing 8 are sequentially arranged in the first annular recess 701. The first bushing 8 is fixedly installed in the first annular recess 701. One extended end of the first spring 10 abuts the first bushing 8, and the other extended end of the first spring 10 extends upward to the outside of the first annular recess 701. The second bushing 9 is fixedly installed in the second annular recess 702. The first bushing 8 is the third limiting member of the present invention.

[0037] Combine Figure 2 and Figure 5 The mud removal device 3 includes a push rod assembly 301, a rotating seat 302, a spline shaft 303, a circular plate 304, a second spring 305, a one-way transmission gear 306, a first limit assembly 307, a second limit assembly 308, a plane bearing 309, a rocker arm 310, and a mud removal plate 311. The spline shaft 303 is the rotating shaft of the present invention and can rotate about a first axis, the first axis extending in the axial direction of the spline shaft 303.

[0038] Combine Figure 5 and Figure 7 The push rod assembly 301 includes a gear rod 3011, a first inner tube 3012, and a bolt 3015. From top to bottom, the gear rod 3011, the bolt 3015, and the first inner tube 3012 are sequentially arranged in the outer tube 2; from top to bottom, the first inner tube 3012 passes through the first bushing 8 and the second bushing 9 in sequence; the first inner tube 3012 includes an internally threaded section 3013, which is located at the upper portion of the first inner tube 3012; the bolt 3015 is screwed into the internally threaded section 3013, and the top of the bolt 3015 abuts the extended end of the gear rod 3011. Changing the screwing depth of the bolt 3015 can adjust the distance between the gear rod 3011 and the first inner tube 3012, thereby adjusting the overall length of the push rod assembly 301. The head of the bolt 3015 has an annular protrusion 3014 that protrudes radially from the bolt 3015. The push rod assembly 301 can move downward within the outer tube 2. When the annular protrusion 3014 abuts the first spring 10, it applies downward pressure to the first spring 10, compressing and storing energy. The first spring 10 then applies an upward elastic force to the annular protrusion 3014, preventing the push rod assembly 301 from further downward movement. The annular protrusion 3014 serves as a stopper in the present invention.

[0039] See also Figure 8A first locking hole 201 is provided on the side wall of the outer tube 2, and a second locking hole 703 is provided on the side wall of the second inner tube 7. The first locking hole 201 and the second locking hole 703 are interconnected. An indexing pin 11 is provided on the wall of the outer tube 2. The indexing pin 11 includes a locking pin 1101 and a third spring 1102. The locking pin 1011 passes through the first locking hole 201 and the second locking hole 703 in sequence, and abuts against the outer circumferential wall of the first inner tube 3012. The third spring 1102 applies an elastic force to the locking pin 1011 along the extension direction of the locking pin 1011 and from the first locking hole 201 to the second locking hole 703. When the locking pin 1011 is pulled along the extension direction of the locking pin 1011 and from the second locking hole 703 to the first locking hole 201, the third spring 1102 compresses and stores energy. The locking pin 1011 can be maintained in a locked position and an unlocked position; when the locking pin 1011 is in the locked position, the extended end of the locking pin 1011 abuts the first inner tube 3012, and the friction resistance between the locking pin 1011 and the first inner tube 3012 prevents the first inner tube 3012 from moving downward under the action of gravity; when the locking pin 1011 is in the unlocked position, the locking pin 1011 is separated from the first inner tube 3012.

[0040] Combine Figure 1 and 5 From top to bottom, the hammer head 4, cushion pad 5, and dredging container 6 are arranged in sequence. The cushion pad 5 is fixed to the upper surface of the dredging container 6. The second inner tube 7 passes through the cushion pad 5 and is fixedly connected to the top of the dredging container 6. The second inner tube 7 passes through the top of the dredging container 6 and is connected to the interior of the dredging container 6. The mud-removing plate 311 is arranged horizontally and located within the dredging container 6. The mud-removing plate 311 is fixedly connected to the extended end of the first inner tube 3012 and the two are arranged perpendicular to each other. The first inner tube 3012 can drive the mud-removing plate 311 to move downward within the dredging container 6. The bottom of the dredging container 6 is provided with an annular cutting blade 601, which is arranged to face downward. The top of the hammer head 4 is provided with a level mounting position 402, and the level 12 is fixedly installed in the level mounting position 402.

[0041] Combine Figure 1 、 Figure 2 and Figure 7The rotating base 302 is cylindrical and includes a base plate 3021 and sidewalls 3022. The sidewalls 3022 are located on the outer periphery of the base plate 3021 and extend in a direction perpendicular to the base plate 3021. The base plate 3021 and the circular plate 304 are located on opposite sides of the sidewalls 3022. The sidewalls 3022 surround the outer periphery of the circular plate 304. An installation space 3023 is formed between the sidewalls 3022, the base plate 3021, and the circular plate 304. The sidewalls 3022 surround the outer periphery of the installation space 3023. The base plate 3021 and the circular plate 304 are located on opposite sides of the installation space 3023. The base plate 3021 is provided with avoidance holes 3027. The avoidance holes 3027 extend through the base plate 3021 in a direction perpendicular to the base plate 3021. The two avoidance holes 3027 are located on opposite radial sides of the base plate 3021. The rotating base 302 includes a fourth through-hole 3025 located on the sidewall 3022. The outer tube 2 includes a fifth through-hole 202. The rotating base 302 is fixedly connected to the outer tube 2 at the location of the fifth through-hole 202. The fifth through-hole 202 and the fourth through-hole 3025 are disposed opposite and interconnected. Along the radial direction of the outer tube 2, the fifth through-hole 202 is opposite the lower portion of the gear rod 3011. A second through-hole 3024 is formed at the center of the bottom plate 3021. A first internal spline portion 3041 is provided at the center of the circular plate 304, and a second internal spline portion 3061 is provided at the center of the one-way transmission gear 306.

[0042] Combine Figures 2 to 4 and Figure 6Along the direction from the circular plate 304 to the bottom plate 3021, the second spring 305, the one-way transmission gear 306, the first limiting assembly 307, the second limiting assembly 308, and the plane bearing 309 are sequentially arranged in the installation space 3023. The first limiting assembly 307 includes a first limiting member 3071, a first rotating plate 3072, and a ball 3073. A third through hole 3074 is defined at the center of the first rotating plate 3072. The third through hole 3074 is a circular hole. Two first limiting members 3071 are located on opposite sides of the first rotating plate 3072 in the radial direction. The first limiting members 3071 are provided with a ball mounting position in the shape of a spherical crown. The ball 3073 is movably mounted in the ball mounting position. The ball 3073, the first limiting member 3071, and the first rotating plate 3072 are sequentially arranged along the radial direction of the first rotating plate 3072. The second limiting assembly 308 includes a second rotating plate 3081 and a cylindrical rotating wheel 3082, with the two cylindrical rotating wheels 3082 located on opposite sides of the second rotating plate 3081 in the radial direction. The cylindrical rotating wheel 3082 is rotatable about a second axis extending in the radial direction of the spline shaft 303. The cylindrical rotating wheel 3082 is a roller of the present invention. The second rotating plate 3081 includes an annular boss that protrudes perpendicularly from the second rotating plate 3081 and toward the base plate 3021. A third internal spline portion 3083 is provided at the center of the second rotating plate 3081 and extends through the second rotating plate 3081 in a direction perpendicular to the second rotating plate 3081. The spline shaft 303 includes an external spline portion 3031 located on the outer periphery of the spline shaft 303 and extending axially to both ends of the spline shaft 303.

[0043] Combine Figures 2 to 4 The two ends of the second spring 305 extend against the circular plate 304 and the one-way transmission gear 306 respectively; along the direction from the circular plate 304 to the bottom plate 3021, the spline shaft 303 sequentially passes through the first inner spline portion 3041, the second spring 305, the second inner spline portion 3061, the third through hole 3074, the third inner spline portion 3083, the plane bearing 309 and the second through hole 3024; the outer spline portion 3031 is respectively connected to the first inner spline portion 3 041, the second inner spline portion 3061 and the third inner spline portion 3083 are in clearance fit; along the circumference of the spline shaft 303, the outer spline portion 3031 is limitedly fitted with the first inner spline portion 3041, the second inner spline portion 3061 and the third inner spline portion 3083; the inner diameter of the third through hole 3074 is larger than the outer diameter of the spline shaft 303; the annular boss is located in the second through hole 3024, and the second rotating plate 3081 is rotatably connected to the bottom plate 3021. Figure 7The rotating seat 302 is provided with a sliding groove 3026 recessed into the inner surface of the side wall 3022. The inner surface of the sliding groove 3026 is an arcuate surface. The sliding groove 3026 extends axially along the spline shaft 303, and two sliding grooves 3026 are arranged on opposite radial sides of the side wall 3022. Ball bearings 3073 are located within the sliding grooves 3026. The ball bearings 3073 engage with the side wall 3022 in a limiting manner along the circumference of the rotating seat 302, limiting the rotation of the first limiting assembly 307 relative to the rotating seat 302 about the first axis.

[0044] Combine Figure 1 and Figures 3 to 5 The extended end of the rocker arm 310 is fixedly connected to a connecting member 3101. The connecting member 3101 includes a first connecting plate 3102 and a second connecting plate 3103, which are respectively arranged on opposite axial sides of the rotating base 302. The first connecting plate 3102 and the second connecting plate 3103 are respectively fixedly connected to the extended ends of the spline shaft 303. The rocker arm 310 can swing about the first axis. When the rocker arm 310 swings upward, the rocker arm 310 drives the spline shaft 303 to rotate in the first rotation direction, and the spline shaft 303 drives the one-way transmission gear 306 and the second limit assembly 308 to rotate synchronously. Because the inner diameter of the third through hole 3074 is larger than the outer diameter of the spline shaft 303, the spline shaft 303 does not transmit rotational force to the first limit assembly 307, and the first limit assembly 307 rotates about the first axis relative to the spline shaft 303.

[0045] Combine Figure 2 and Figure 6 The first limiting member 3071 is an arc-shaped plate-like structure. The first limiting member 3071 includes a limiting mating surface 3075. The limiting mating surface 3075 has an extension start end and an extension end. The limiting mating surface 3075 faces the second limiting assembly 308. The limiting mating surface 3075 extends from the extension start end to the extension end in a direction inclined to the first rotation direction, and the limiting mating surface 3075 gradually moves away from the second limiting member 308 in the extension direction of the first axis. Figure 3 When the cylindrical wheel 3082 is in the first mating position, the side wall of the cylindrical wheel 3082 abuts against the mating surface 3075 at the extension start of the mating surface 3075, and the cylindrical wheel 3082 and the mating surface 3075 are in line contact; in the axial direction of the spline shaft 303, the first limiting member 3071 and the cylindrical wheel 3082 are in limited engagement; and then combined with Figure 4When the rocker arm 310 drives the second limiting assembly 308 to rotate along the first rotation direction through the spline shaft 303, the cylindrical wheel 3082 moves around the first axis along the first rotation direction, the second spring 305 releases the elastic stored energy, and the second spring 305 pushes the one-way transmission gear 306 and the first limiting assembly 307 to move toward the second limiting assembly 308 along the extension direction of the first axis, and the ball 3073 slides in the sliding groove 3026 along the extension direction of the first axis; when the cylindrical wheel 3082 rotates to the second mating position, the side wall surface of the cylindrical wheel 3082 abuts against the extended tail end of the limiting mating surface 3075 The limiting mating surface 3075, the first rotating plate 3072 abuts the second rotating plate 3081, and the one-way transmission gear 306 moves to the location of the fourth through hole 3025. At this time, the one-way transmission gear 306 is in the meshing position, and the extended end of the first limiting member 3071 is located in the avoidance through hole 3027. The one-way transmission gear 306 is meshed with the gear rod 3011. When the rocker arm 310 continues to swing upward, the cylindrical wheel 3082 separates from the first limiting member 3071, and the one-way transmission gear 306 rotates along the first rotation direction. The one-way transmission gear 306 drives the gear rod 3011 to move downward relative to the one-way transmission gear 306. The one-way transmission gear 306 is divided into an external gear ring and an internal rotating body. The rotating body cooperates with the spline shaft 303. When the rotation directions of the spline shaft 303 and the one-way transmission gear 306 are consistent, the rotating body drives the gear ring to rotate. When the rotation directions of the rotating body and the one-way gear are opposite, the rotating body and the gear ring slide against each other, and the rotating body rotates idly around its own axis. When the rocker arm 310 swings downward, the second limit assembly 308 rotates along the second rotation direction. Based on the one-way transmission characteristics of the one-way transmission gear 306, the one-way transmission gear 306 will not rotate along the second rotation direction with the spline shaft 303; when the second limit assembly 308 rotates along the second rotation direction to the second matching position, the cylindrical wheel 3082 abuts against the first limit member 3071 at the extended tail end of the limit matching surface 3075. At this time, the rocker arm 310 continues to swing downward, and the second limit assembly 308 rotates from the second matching position to the first matching position along the second rotation direction. The cylindrical wheel 3082 abuts against the first limit member 3071 at the extended head end of the limit matching surface 3075. During this process, the cylindrical wheel 3082 pushes the first limit member 3071 back to the initial position along the extension direction of the first axis; the first limit assembly 307 drives the one-way transmission gear 306 back to the separation position, and the one-way transmission gear 306 is released from the gear rod 3011. Combined with Figure 5Repeatedly swinging the rocker arm 310 up and down causes the gear rod 3011 to continuously move downward, thereby driving the de-mud plate 311 to move downward relative to the dredging container 6. When the gear rod 3011 moves downward to its limit relative to the outer tube 2, the annular protrusion 3014 abuts the first spring 10, exerting downward pressure on the first spring 10. The first spring 10 compresses and stores energy, and the first spring 10 exerts an upward elastic force on the annular protrusion 3014, preventing the push rod assembly 301 from further downward movement. The upward resistance of the rocker arm 310 increases, prompting the operator to indicate that the gear rod 3011 has reached its limit. The first bushing 8 blocks the first spring 10 and the annular protrusion 3014 from top to bottom, preventing the gear rod 3011 from moving too far downward, which would cause the de-mud plate 311 to extend outside the dredging container 6. The first and second rotational directions are opposite to each other.

[0046] Combine Figure 2 、 Figure 3 and Figure 5 The lock assembly 13 includes a first locking member 1301 and a second locking member 1302. The first locking member 1301 is fixedly connected to the rocker arm 310, and the second locking member 1302 is fixedly connected to the outer tube 2. In the initial state, the first locking member 1301 and the second locking member 1302 can be locked with each other to lock the rocker arm 310 on the outer tube 2; when the first locking member 1301 and the second locking member 1302 are locked with each other, the cylindrical rotating wheel 3082 abuts against the first limiting member 3071 at the extended head end of the limiting matching surface 3075, the one-way transmission gear 306 and the first limiting assembly 307 are in the initial position, and the one-way transmission gear 306 is separated from the gear rod 3011.

[0047] When using the hole picker of this embodiment to dig a hole on a golf course, first, interlock the first locking member 1301 with the second locking member 1302. Pull the locking pin 1101 out of the second locking hole 703, leaving it outside the second locking hole 703. At this point, the outer tube 2 can move up and down relative to the second inner tube 7. Align the cutting edge 601 of the dredging container 6 with the hole digging location. Adjust the angle of the hole picker using the level 12. Once the hole picker is adjusted to the appropriate angle, press the handle 1 downward to insert the dredging container 6 into the lawn to a certain depth. Then, pull the handle 1 upward, which drives the outer tube 2 and hammer 4 upward, separating the hammer 4 from the cushion 5. After the hammer 4 moves upward to a certain height, release the handle 1. Under the action of gravity, the hammer 4 moves downward, striking the cushion 5 and the dredging container 6. Under the hammering action of the hammer 4, the dredging container 6 gradually moves deeper into the lawn. Repeat these steps several times to complete the hole digging. After the hole is dug, the locking pin 1011 is adjusted to the locking position, and the outer tube 2 and the second inner tube 7 are locked relative to each other in the vertical direction; the handle 1 is pulled upward to pull the dredging container 6 out of the hole. At this time, the dredging container 6 retains soil; after the dredging container 6 with soil is inserted into the old hole, the locking cooperation of the first locking piece 1301 and the second locking piece 1302 is released, and the locking pin 1011 remains in the locking position. The rocker arm 310 swings back and forth up and down, and the mud-removing plate 311 is restricted by the soil in the dredging container 6 and cannot move downward. Therefore, the one-way transmission gear 306 moves upward relative to the gear rod 3011, thereby driving the outer tube 2 to move upward. Since the locking pin 1011 is located in the first locking hole 201 and the second locking hole 703, the outer tube 2 drives the second inner tube 7 to move upward relative to the first inner tube 3012, and the second inner tube 7 drives the dredging container 6 to move upward, so that the dredging container 6 is pulled out of the old hole and the soil in the dredging container 6 remains in the old hole.

[0048] The excavator provided by the present invention achieves automatic separation and engagement of the one-way transmission gear 306 and the gear rod 3011 during the de-mudging process through the cooperation between the first limit assembly 307 and the second limit assembly 308, resulting in simple operation and high de-mudging efficiency. The cylindrical rotating wheel 3082 and the limit mating surface 3075 are in line contact, and the cooperation between the first limit assembly 307 and the second limit assembly 308 is more stable. The rolling friction between the cylindrical rotating wheel 3082 and the limit mating surface 3075 reduces the frictional resistance between the first limit assembly 307 and the second limit assembly 308. The ball 3073 cooperates with the slide groove 3026 to prevent the first limit assembly 307 from rotating about the first axis, ensuring that the first limit assembly 307 and the second limit assembly 308 form a stable limit fit in the axial direction of the spline shaft 303.

[0049] Finally, it should be emphasized that the above 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 changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hole digger, comprising: Dredging containers and de-sludge devices; The mud-removing device includes a rotating seat, a rotating shaft, a mud-removing plate, a push rod assembly and a gear. The mud-removing plate is located in the dredging container. The push rod assembly is connected to the mud-removing plate. The push rod assembly includes a gear rod. The rotating shaft is rotatably connected to the rotating seat. The rotating shaft can drive the gear to rotate around the axis of the rotating shaft. The gear cooperates with the gear rod to drive the push rod assembly to move downward. Its characteristics are: The mud-removing device further includes an elastic member, a first limiting assembly and a second limiting assembly arranged in the rotating seat; The second limiting assembly rotates coaxially with the rotating shaft; The first limiting assembly is rotatable relative to the rotating shaft, and the second limiting assembly limits the first limiting assembly from the axial direction of the rotating shaft; The first limiting assembly and the gear can both move along the axial direction; The elastic member, the gear, the first limiting assembly and the second limiting assembly are abutted in sequence along the axial direction; When the second limiting assembly rotates to the second engaging position along the first rotation direction, the second limiting assembly releases the axial restriction on the first limiting assembly, and the elastic member pushes the gear to move along the axial direction to the meshing position under the action of the elastic member, and the gear at the meshing position meshes with the gear rod; The first limiting assembly includes a first limiting member; the second limiting assembly includes a second limiting member; in the axial direction, the second limiting member is in limiting cooperation with the first limiting member; The first position-limiting member includes a position-limiting mating surface; in the axial direction, the position-limiting mating surface is opposite to the second position-limiting member, and the second position-limiting member abuts against the position-limiting mating surface; the position-limiting mating surface extends in a direction oblique to the first rotation direction and gradually moves away from the second position-limiting member in the axial direction; The second limiting member includes a roller, which is rotatable around a second axis and is in rolling friction engagement with the limiting mating surface; There is line contact between the second limiting member and the limiting matching surface; The gear comprises a one-way transmission gear; The rotating shaft drives the one-way transmission gear to rotate coaxially along the first rotation direction; When the rotating shaft rotates along the second rotating direction, the one-way transmission gear rotates along the first rotating direction relative to the rotating shaft; The second rotation direction is opposite to the first rotation direction; The rotating seat includes a slide groove, which is located on the inner periphery of the rotating seat and extends along the axial direction of the rotating shaft; The first limiting component includes a sliding member.

2. The hole digging tool according to claim 1, characterized in that: Along the radial direction of the rotating shaft, the first limiting member, the sliding member and the sliding groove are arranged in sequence, and the sliding member is in the sliding groove; In the circumferential direction of the rotating shaft, the sliding member is limitedly matched with the rotating seat.

3. The hole digging tool according to claim 2, characterized in that: The first position-limiting member includes a sliding member installation position, and the sliding member is located in the sliding member installation position; The sliding member is a ball.

4. The hole digging tool according to claim 3, characterized in that: The installation position of the sliding member is in the shape of a spherical crown; The inner surface of the sliding groove is a curved surface.

5. The hole digging tool according to claim 1, characterized in that: The mud-removing device further includes a plane bearing; Along the axial direction, the first limiting member, the second limiting member and the plane bearing are arranged in sequence, and the plane bearing is located between the second limiting component and the rotating seat.

6. The hole digging tool according to claim 1, characterized in that: The hole digger includes an outer tube and a third limiting member, and the push rod assembly and the third limiting member are both located inside the outer tube; the push rod assembly includes a limiting portion, and in the vertical direction, the limiting portion is in limiting cooperation with the third limiting member.

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