A manual forklift capable of quick start
By designing the drive system of ratchet pawl assembly, transmission gear set and switch assembly in a manual forklift, the wheel rotation jams and inconvenient maintenance problems are solved, and the forklift starts is achieved with a lighter and faster effect.
Patent Information
- Application Number
- CN202421501005.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The drive devices of existing manual forklifts are prone to wheel jamming, hindering the forklift's advance, resulting in unspare effort during startup, and the hydraulic transmission system is complex in structure and inconvenient to repair.
A drive system including a ratchet pawl assembly, a transmission gear set and a switch assembly is designed. The connection and separation of the pawl and the ratchet are controlled through the switch assembly to realize auxiliary driving of the forklift when starting.
It realizes that the forklift is applied to the front wheel when starting, making the forklift more lightweight and labor-saving, the starting speed is faster, and the work efficiency is improved. It quickly switches the usage mode according to the transportation scenario, making it more applicable.
Smart Images

Figure CN222715033U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic forklifts, in particular to a manual forklift which can be started quickly. Background Art
[0002] A manual forklift is a transport vehicle that lifts objects through hydraulics. Its hydraulic principle is the same as that of a jack. By pressing down the handle, the piston head lifts the fork plate of the forklift to lift the heavy objects. Then, the forklift is dragged by manpower to transport the heavy objects. Because it is easy to operate, economical and practical, it is widely used in workshops within factories, logistics warehouses and other places.
[0003] Although manual forklifts are particularly suitable for transporting heavy objects, during use, since heavy objects are usually heavy, when the forklift starts, the operator needs to overcome the large ground friction to pull and transport the forklift, which is very laborious. The prior art patent "Wheel drive device for manual forklift" (Announcement No.: CN1099998C) discloses a method of applying driving force to the wheel by hydraulically driving the rack to achieve the purpose of labor saving, but the prior art still has the following technical problems:
[0004] 1. The prior art is to use hydraulic pressure to push the piston to drive the rack connected to the piston, and then the rack drives the gear on the wheel shaft, thereby applying a forward force to the wheel shaft. However, since the rack and the gear are meshed, when the wheel rotates, the rack cannot be disengaged from the gear, so that the rack will exert a reverse force on the gear, causing the rotation of the wheel shaft to be stuck, which not only does not save effort, but also hinders the forklift from moving forward;
[0005] 2. Due to the complex structure of the hydraulic transmission system, if a fault occurs, it is not easy to find the cause of the fault. During maintenance, the cylinder, oil pipe and other components need to be removed. There are many operating steps and the maintenance of parts is very inconvenient. Utility Model Content
[0006] The utility model provides a manual forklift which can be started quickly, and can solve the problem that the driving device of the existing forklift is prone to wheel rotation jamming, which hinders the forklift from moving forward and causes labor-saving when starting the forklift.
[0007] The present application provides the following technical solution: a manual forklift that can be started quickly, comprising a frame, a handle located at the front part of the frame, and front and rear wheels located at the bottom of the frame. The frame head is also provided with a hydraulic system, the side below the handle is hinged to a small piston of the hydraulic system, and the frame is fixedly connected to a large piston of the hydraulic system; the bottom of the handle is hinged to the frame head or the housing of the hydraulic system;
[0008] The vehicle also includes a driving system located at the front part of the frame, the driving system including a ratchet pawl assembly connected to the lower part of the handle, a transmission gear set and a switch assembly for controlling the pawl to contact or disengage from the ratchet wheel, and the transmission is realized between the ratchet pawl assembly and the front wheel through the transmission gear set;
[0009] The switch assembly drives the front wheel to rotate by controlling the ratchet pawl assembly and the transmission gear set.
[0010] Beneficial effects:
[0011] 1. The switch assembly is fixed on the handle, so that the operator can start the switch assembly when the forklift starts, so that the switch assembly drives the ratchet pawl of the ratchet pawl assembly to fit into the tooth groove of the ratchet. At this time, the handle is swung downward, and the torque of the handle swing can be transmitted to the ratchet through the pawl, and then the front wheel is driven to rotate through the transmission gear set, so that when the forklift starts, auxiliary driving force is applied to the front wheel, making it easier and more labor-saving to pull the forklift to start, and the starting speed is faster, which is conducive to improving work efficiency.
[0012] 2. When carrying light goods, if there is no need to apply auxiliary driving force, the switch assembly can be turned off to allow the switch assembly to control the pawl to disengage from the ratchet tooth groove. At this time, the torque of the handle swing will not be transmitted to the front wheel, which is conducive to the operator to choose the appropriate usage mode according to different transportation scenarios, and it is more applicable.
[0013] Furthermore, the handle includes a rocker arm and a handle fixed on the upper end of the rocker arm, the lower end of the rocker arm is rotatably connected to the top of the hydraulic system, a sliding hole is provided in the center of the rocker arm, a radially penetrating open groove is provided at the lower end of the rocker arm, a protrusion is provided on the side of the rocker arm, a third connecting frame is pivotally connected to the protrusion, and the end of the third connecting frame away from the protrusion is pivotally connected to the hydraulic system.
[0014] Beneficial effect: the operator holds the handle to swing or pull the handle, the lower end of the swing arm is rotatably connected to the top of the hydraulic system, and the third connecting frame drives the hydraulic system to generate a lifting force to lift the frame when the swing arm swings.
[0015] Furthermore, the switch assembly includes a pressure rod rotatably connected above the rocker arm, a pull rod slidably connected to the central sliding hole of the rocker arm, a tension spring fixed between the pull rod and the pressure rod, and a connecting rod pivotally connected to the lower end of the pull rod. An opening is axially opened at the upper end of the rocker arm, one end of the pressure rod extends into the opening and is fixed to the upper end of the tension spring, and the other end of the pressure rod extends out of the opening.
[0016] Beneficial effect: when it is necessary to apply auxiliary driving force to the front wheel, press the pressure rod downward to make the pull rod slide upward along the sliding hole, and at the same time drive the connecting rod to swing, and the end of the pawl away from the connecting rod can be inserted into the tooth groove of the ratchet. At this time, the operator swings the handle to transmit the swinging torque to the transmission gear group through the ratchet pawl assembly, thereby applying auxiliary driving force to the front wheel; release the pressing handle, the rebound force of the tension spring controls the pressure rod to reset, and the pawl will also disengage from the tooth groove of the ratchet. At this time, the switch assembly is closed, which is conducive to the operator to quickly switch the usage mode according to the actual transportation situation, thereby improving applicability.
[0017] Furthermore, the ratchet pawl assembly includes a first rotating shaft, a ratchet connected to the first rotating shaft by a key, and a pawl pivotally connected to the lower end of the connecting rod. The middle part of the pawl is rotatably connected to a pin shaft, and the two ends of the pin shaft are fixed to the two side walls of the open groove at the lower end of the rocker arm. Two vertical positioning plates are fixed above the hydraulic system, the first rotating shaft is rotatably connected to the positioning plate, the lower end of the rocker arm is located between the two positioning plates and is rotatably connected to the rod portion of the first rotating shaft, and the ratchet is located in the open groove at the lower end of the rocker arm, and one end of the first rotating shaft extends laterally from the center of the positioning plate.
[0018] Beneficial effect: The ratchet is arranged in the open groove at the lower end of the rocker arm, which makes it easy for the pawl of the switch assembly to be inserted into the tooth groove of the ratchet or disengaged from the tooth groove, thereby realizing the switch assembly controlling the connection and separation of the ratchet and the pawl. When the pawl is inserted into the tooth groove of the ratchet, the ratchet can only be driven to rotate in one direction, thereby avoiding reversal of the ratchet and preventing the auxiliary driving force from interfering with the forward direction of the front wheel, causing the front wheel to rotate in the opposite direction.
[0019] Furthermore, the transmission gear set includes a master-slave gear keyed to a first rotating shaft, a second rotating shaft fixed to a hydraulic system, an idler gear keyed to the second rotating shaft, a third rotating shaft rotatably connected to a lower front portion of the frame, and a driven gear keyed to an end portion of the third rotating shaft, wherein the idler gear is meshed between the driving gear and the driven gear.
[0020] Beneficial effect: The driving force of the driving gear is transmitted to the driven gear through the idler gear, so that the auxiliary driving force can drive the third shaft, and then drive the front wheel forward, so as to achieve the purpose of rapid starting of the front wheel.
[0021] Furthermore, the frame includes a main body, a support frame, a first connecting frame pivotally connected between the main body and the support frame, and a second connecting frame pivotally connected to the rear of the main body, the second connecting frame is pivotally connected to the rear wheel at one end away from the main body, the support frame is T-shaped, the hydraulic system is rotatably connected to the top of the support frame, and the bottom of the support frame is rotatably connected to the third rotating shaft.
[0022] Beneficial effects: The support frame is used to support the hydraulic system, which is conducive to the piston of the hydraulic system to lift the main body. The frame body is used to place goods. After the hydraulic system lifts the main body, it is convenient for the operator to drag the forklift to transport the goods.
[0023] Furthermore, the ratchet pawl assembly includes a core shaft rotatably connected to the hydraulic system, a ratchet connected to the core shaft by a key, a pin shaft rotatably connected to the lower end of the rocker arm, and a pawl fixed to the end of the pin shaft; a shift block is fixed on the rod portion of the pin shaft, and the end of the shift block away from the pin shaft is pivotally connected to the end of the connecting rod.
[0024] Beneficial effect: The shift block is used to connect the connecting rod of the switch assembly, so as to facilitate the control of the engagement and disengagement of the pawl and the ratchet wheel through the switch assembly, thereby realizing effective control of the auxiliary drive when the forklift is started.
[0025] Furthermore, the transmission gear set includes a driving bevel gear keyed to the core shaft, a transmission helical gear rotatably connected to the front part of the frame, a third rotating shaft rotatably connected to the lower part of the front part of the frame, and a driven bevel gear keyed to the third rotating shaft; the upper and lower ends of the transmission helical gear are both helical gears, and the helical gear at the upper end is meshed with the driving bevel gear for transmission, and the helical gear at the lower end is meshed with the driven bevel gear for transmission.
[0026] Beneficial effect: Through the meshing transmission of the transmission helical gear with the active bevel gear and the driven bevel gear, the auxiliary driving force of the handle can be stably and accurately transmitted to the front wheel of the forklift. When the helical gear and the bevel gear are meshing, their contact area is more sufficient than that of the spur gear, and the stress during gear meshing can be distributed to the tangential and radial directions, with stronger load-bearing capacity, less noise and higher transmission efficiency, which can effectively improve the service life of the gear set. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is the structural front view of the utility model.
[0028] Figure 2 Based Figure 1 Left view of the vehicle (with the main frame removed).
[0029] Figure 3 for Figure 2 Left view of .
[0030] Figure 4 for Figure 1 A magnified view of center.
[0031] Figure 5 for Figure 2 Magnified view of B.
[0032] Figure 6 This is a front view of the forklift head of the second embodiment.
[0033] Figure 7 for Figure 6 Left view of . DETAILED DESCRIPTION
[0034] The following is further described in detail through specific implementation methods:
[0035] The symbols in the drawings of the specification include: main body 1, fork plate 101, vertical arm 102, horizontal arm 103, handle 2, swing rod 3, pull rod 4, third connecting frame 5, support frame 6, front wheel 7, first connecting frame 8, second connecting frame 9, rear wheel 10, pressure rod 11, pressure rod tension spring 111, opening 12, sliding hole 13, tension spring 14, first rotating shaft 15, driving gear 16, second rotating shaft 17, idler wheel 18, driven gear 19, third Rotating shaft 20, supporting arm 21, supporting plate 22, valve switch 23, hydraulic pump body 24, connecting rod 25, ratchet 26, baffle 27, compression spring 28, small piston 29, first one-way valve 30, oil groove 31, pressure relief valve 32, second one-way valve 33, large piston 34, pin 35, ratchet 36, positioning plate 37, opening groove 38, shift block 39, spindle 40, transmission bevel gear 41, driven bevel gear 42, driving bevel gear 43.
[0036] Embodiment 1
[0037] like Figures 1 to 5 As shown, a manual forklift that can be started quickly includes a frame, a handle located at the front part of the frame, a front wheel 7 and a rear wheel 10 located at the bottom of the frame, and a hydraulic system and a driving system located at the front part of the frame.
[0038] like Figure 1 As shown, the frame includes a main body 1, a support frame 6, a first connecting frame 8 pivotally connected between the main body 1 and the support frame 6, and a second connecting frame 9 pivotally connected to the rear part of the main body 1. The end of the second connecting frame 9 away from the main body 1 is pivotally connected to the rear wheel 10.
[0039] like Figure 1 As shown, the main body 1 includes a horizontally arranged fork plate 101 , a vertical arm 102 vertically welded and fixed on the fork plate 101 , and a horizontal arm 103 horizontally welded and fixed on the upper part of the vertical arm 102 .
[0040] like Figure 1 and Figure 2 As shown, the support frame 6 is T-shaped, including a support plate 22 and a support arm 21 rotatably connected to the bottom of the support plate 22, the upper end of the support arm 21 extends above the support plate 22 and is rotatably connected to the bottom of the hydraulic system, and the two ends of the first connecting frame 8 are respectively pivoted to the sides of the support plate 22 and the fork plate 101.
[0041] Hydraulic system such as Figure 4As shown (the hydraulic system itself is a prior art, but in order to describe the scheme of the present application, a brief description is given here), the hydraulic system includes a hydraulic pump body 24, a small piston 29 and a large piston 34 fixed on a support plate 22; a small chamber, a large chamber and an oil tank 31 are provided in the hydraulic pump body 24, the small piston 29 and the large piston 34 are slidably connected in the small chamber and the large chamber respectively, the oil tank 31, the small chamber and the large chamber are all connected, and the inside is filled with hydraulic oil, a first one-way valve 30 is provided on the connecting pipe between the oil tank 31 and the small chamber, and only hydraulic oil is allowed to flow from the oil tank 31 into the small chamber, a second one-way valve 33 is provided on the connecting pipe between the small chamber and the large chamber, and only hydraulic oil is allowed to flow from the small chamber into the large chamber, a pressure relief valve 32 is provided on the connecting pipe between the large chamber and the oil tank 31, and the valve switch of the pressure relief valve 32 extends to the outside of the side of the hydraulic pump body 24 ( Figure 2 As shown in the figure, the upper end of the small piston 29 extends out of the hydraulic pump body 24 and is threadedly fixed with a baffle 27, and the rod portion of the small piston 29 between the baffle 27 and the upper surface of the hydraulic pump body 24 is sleeved with a compression spring 28, the upper end of the large piston 34 extends out of the hydraulic pump body 24 and is threadedly connected to the bottom surface of the transverse arm 103, and two positioning plates 37 are also fixed above the hydraulic pump body 24.
[0042] The handle includes a swing rod 3 and a handle 2 fixed to the upper end of the swing rod 3. Figure 1 and Figure 4 As shown, a protrusion is provided on the side surface of the lower end of the swing rod 3, and a third connecting frame 5 is pivotally connected to the protrusion. The end of the third connecting frame 5 away from the protrusion is pivotally connected to the protrusion above the baffle 27; the lower end of the swing rod 3 is provided with a radially penetrating opening groove 38 ( Figure 5 As shown in the enlarged figure, the central axis of the rocker rod 3 is provided with Figure 2 As shown in the sliding hole 13, an opening 12 is axially provided at the upper end of the rocker rod 3.
[0043] like Figures 2 to 5 As shown, the driving system includes a ratchet pawl assembly connected to the lower part of the handle, a transmission gear set and a switch assembly for controlling the pawl to contact or disengage from the ratchet.
[0044] like Figure 2 As shown, the switch assembly includes a pressure rod 11 rotatably connected to the opening 12 above the swing rod 3, a pull rod 4 slidably connected to the slide hole 13, a tension spring 14 fixed between the pull rod 4 and the pressure rod 11, and Figure 4 and Figure 5 As shown in the connecting rod 25 pivotally connected to the lower end of the pull rod 4; Figure 2 As shown, one end of the pressure rod 11 extends into the opening 12 and is fixed to the upper end of the tension spring 14, and the other end of the pressure rod 11 extends out of the opening 12. A pressure rod tension spring 111 is also fixed to the rod portion of the pressure rod 11, and the other end of the pressure rod tension spring is fixed to the handle 2.
[0045] like Figure 2 , Figure 4 and Figure 5 As shown, the ratchet pawl assembly includes a first shaft 15 rotatably connected to a positioning plate 37, a ratchet 36 key-connected to the first shaft 15, and a pawl 26 pivotally connected to the lower end of the connecting rod 25. The lower end of the swing rod 3 is located between the two positioning plates 37 and rotatably connected to the rod portion of the first shaft 15, and the ratchet 36 is located in an open slot 38 at the lower end of the swing rod 3. Figure 5 As shown, the pawl 26 is located above the ratchet wheel 36, and a pin is rotatably connected to the middle of the pawl 26, both ends of the pin are fixed to the two inner side walls of the opening groove 38 at the lower end of the swing rod 3, and one end of the first rotating shaft 15 extends horizontally from the center of the positioning plate 37.
[0046] like Figure 2 and Figure 3 As shown, the transmission gear set includes a driving gear 16 keyed to a first rotating shaft 15, a second rotating shaft 17 fixed to the side of the hydraulic system, an idler gear 18 keyed to the end of the second rotating shaft 17, a third rotating shaft 20 rotatably connected to the lower end of a support arm 21, and a driven gear 19 keyed to the end of the third rotating shaft 20, the front wheels 7 are keyed to both ends of the third rotating shaft 20, and one end of the third rotating shaft 20 extends out of the side of one of the front wheels 7, and the idler gear 18 is meshed between the driving gear 16 and the moving gear.
[0047] The use of this forklift is as follows:
[0048] After the fork plate 101 of the forklift is inserted into the material tray, hold the handle 2 and move the swing rod 3 according to Figure 1 Swing in the direction of the arrow, so that Figure 4 The small piston 29 in the fork plate 101 moves downward, and the hydraulic oil in the small chamber flows from the small chamber into the large chamber through the second one-way valve 33. According to the hydraulic principle, the large piston 34 can be pushed upward to lift the entire body 1 and the goods on the fork plate 101 off the ground. If the lifting height is not enough, the swing arm 3 is pressed Figure 1 Reset in the opposite direction of the arrow (when the swing arm 3 is reset, the hydraulic oil in the oil tank 31 will enter the small chamber through the first one-way valve 30 to be filled), and continue to press down the swing arm 3 until the cargo is lifted to a suitable height;
[0049] Then press the pressure rod 11 downward and hold it, the tension spring 14 will pull the pull rod 4 upward. Figure 4 The connecting rod 25 drives the pawl 26 to rotate around the pin 35, so that the lower end of the pawl 26 is placed in the tooth groove of the ratchet wheel 36, and then the pawl 26 is rotated in the same manner. Figure 1 The swing rod 3 is swung in the direction indicated by the arrow, and the pawl 26 will then catch the ratchet wheel 36, causing the ratchet wheel 36 to rotate along with the pawl 26 (in Figure 4The ratchet 36 rotates counterclockwise), and then the first rotating shaft 15 connected with the ratchet 36 drives the driving gear 16 to rotate, and transmits the driving force to the driven gear 19 through the idler gear 18. The third rotating shaft 20 receives the driving force and drives the front wheel 7 forward, so as to achieve the purpose of quick start and labor saving; when the front wheel 7 rotates, the pressure rod 11 is loosened, and the resilience of the pressure rod tension spring 111 resets the pressure rod 11, so that the pawl 26 is disengaged from the tooth groove of the ratchet 36, and the forklift can be dragged forward normally.
[0050] Embodiment 2
[0051] This embodiment provides a structure that can replace the transmission gear set in the first embodiment, and the installation position of the ratchet pawl assembly is different, such as Figure 6 and Figure 7 As shown, a core shaft 40 is rotatably connected to the side of the hydraulic pump body 24, a ratchet 36 is keyed to the end of the core shaft 40, a pin shaft 35 is rotatably connected to the two side walls of the open groove 38 at the lower end of the rocker arm 3, and one end of the pin shaft 35 extends from the side wall of the open groove 38, and the pawl 26 is fixed to the end of the pin shaft 35 after it extends out of the side wall of the open groove 38; a shift block 39 is also fixed to the rod portion of the pin shaft 35 located in the open groove 38, and the lower end of the connecting rod 25 is pivotally connected to the end of the shift block 39.
[0052] The transmission gear set includes a driving bevel gear 43 keyed to the core shaft 40, a transmission helical gear 41 sleeved on the support arm 21, and a driven bevel gear 42 keyed to the third rotating shaft 20; the driving bevel gear 43 is located between the ratchet 36 and the hydraulic pump body 24; the transmission helical gear 41 can rotate relative to the support arm 21 and the support plate 22, the upper and lower ends of the transmission helical gear 41 are both helical gears, and the helical gear at the upper end is meshed with the driving bevel gear 43 for transmission, and the helical gear at the lower end is meshed with the driven bevel gear 42 for transmission.
[0053] When in use, the pressure rod is pressed down and held, and the tension spring 14 pulls the pull rod 4 upward. Figure 7 The connecting rod 25 in the middle will pull the shift block 39 and drive the pin 35 to rotate clockwise, and the lower end head of the pawl 26 is driven by the pin 35 to fit into the tooth groove of the ratchet wheel 36, and then Figure 7 The swing lever 3 is swung in the direction indicated by the middle arrow, and the head of the ratchet 26 is clamped on the ratchet wheel 36 to drive the mandrel 40 and the active bevel gear 43 on the mandrel 40 to rotate in the clockwise direction, and the active bevel gear 43 drives the transmission bevel gear 41 to rotate in the clockwise direction. Figure 6 The transmission bevel gear 41 rotates in the direction of the arrow in the figure (if viewed from a top view, the transmission bevel gear 41 rotates clockwise), so that the transmission bevel gear 41 drives the driven bevel gear 42 to rotate (the driven bevel gear 42 rotates clockwise). Figure 7 From the perspective of the steering wheel, it rotates clockwise), thereby driving the wheels to rotate, achieving the purpose of assisting in driving the wheels forward.
[0054] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A manual forklift capable of quick start, comprising a frame, a handle at the front of the frame, and front and rear wheels at the bottom of the frame. The frame head is also provided with a hydraulic system, the side below the handle is hinged to a small piston of the hydraulic system, and the frame is fixedly connected to a large piston of the hydraulic system; the bottom of the handle is hinged to the frame head or a housing of the hydraulic system, and is characterized in that: The vehicle also includes a driving system located at the front part of the frame, the driving system including a ratchet pawl assembly connected to the lower part of the handle, a transmission gear set and a switch assembly for controlling the pawl to contact or disengage from the ratchet wheel, and the transmission is realized between the ratchet pawl assembly and the front wheel through the transmission gear set; The switch assembly drives the front wheel to rotate by controlling the ratchet pawl assembly and the transmission gear set.
2. A quick-start manual forklift according to claim 1, characterized in that: The handle includes a swing rod and a handle fixed on the upper end of the swing rod, the lower end of the swing rod is rotatably connected to the top of the hydraulic system, a sliding hole is provided in the center of the swing rod, a radially penetrating opening groove is provided at the lower end of the swing rod, a protrusion is provided on the side of the swing rod, a third connecting frame is pivotally connected to the protrusion, and the end of the third connecting frame away from the protrusion is pivotally connected to the hydraulic system.
3. A quick-start manual forklift according to claim 2, characterized in that: The switch assembly includes a pressure rod rotatably connected above the rocker arm, a pull rod slidably connected to the central sliding hole of the rocker arm, a tension spring fixed between the pull rod and the pressure rod, and a connecting rod pivotally connected to the lower end of the pull rod. An opening is axially opened at the upper end of the rocker arm, one end of the pressure rod extends into the opening and is fixed to the upper end of the tension spring, and the other end of the pressure rod extends out of the opening.
4. A quick-start manual forklift according to claim 3, characterized in that: The ratchet pawl assembly includes a first rotating shaft, a ratchet connected to the first rotating shaft by a key, and a pawl pivotally connected to the lower end of the connecting rod. The middle part of the pawl is rotatably connected to a pin shaft, and the two ends of the pin shaft are fixed to the two side walls of the open groove at the lower end of the rocker arm. Two vertical positioning plates are fixed above the hydraulic system. The first rotating shaft is rotatably connected to the positioning plate, the lower end of the rocker arm is located between the two positioning plates and rotatably connected to the rod portion of the first rotating shaft, and the ratchet is located in the open groove at the lower end of the rocker arm, and one end of the first rotating shaft extends laterally from the center of the positioning plate.
5. A quick-start manual forklift according to claim 4, characterized in that: The transmission gear set includes a master-slave gear keyed to a first rotating shaft, a second rotating shaft fixed to a hydraulic system, an idler gear keyed to the second rotating shaft, a third rotating shaft rotatably connected to the lower front portion of the frame, and a driven gear keyed to the end of the third rotating shaft, wherein the idler gear is meshed between the driving gear and the driven gear.
6. A quick-start manual forklift according to claim 5, characterized in that: The frame includes a main body, a support frame, a first connecting frame pivotally connected between the main body and the support frame, and a second connecting frame pivotally connected to the rear of the main body, the second connecting frame is pivotally connected to the rear wheel at one end away from the main body, the support frame is T-shaped, the hydraulic system is rotatably connected to the top of the support frame, and the bottom of the support frame is rotatably connected to the third rotating shaft.
7. A quick-start manual forklift according to claim 3, characterized in that: The ratchet pawl assembly includes a spindle rotatably connected to the hydraulic system, a ratchet connected to the spindle by a key, a pin rotatably connected to the lower end of the rocker arm, and a pawl fixed to the end of the pin; a shift block is fixed to the rod portion of the pin, and one end of the shift block away from the pin is pivotally connected to the end of the connecting rod.
8. A quick-start manual forklift according to claim 7, characterized in that: The transmission gear set includes a driving bevel gear keyed to the core shaft, a transmission helical gear rotatably connected to the front part of the frame, a third rotating shaft rotatably connected to the lower part of the front part of the frame, and a driven bevel gear keyed to the third rotating shaft; the upper and lower ends of the transmission helical gear are both helical gears, and the helical gear at the upper end is meshed with the driving bevel gear for transmission, and the helical gear at the lower end is meshed with the driven bevel gear for transmission.
Citation Information
Patent Citations
Wheel drive device for hand forklifts
CN1099998C