CN208469560U - The big pulling force hand throttle of anticreep - Google Patents

Abstract

The utility model discloses a kind of big pulling force hand throttle of anticreep, including the combination of button, handle ball, pressure spring, handlebar, push rod, spring washer, plain cushion, positioning wedged block, handle gland；Button is set to handle ball；Pressure spring is set in handle ball, and one end connects button, and the other end is placed on push rod combination；Handlebar is hollow stem；Push rod group is combined into T shape, and perpendicular end penetrates in handlebar；Spring washer peace cushion cover is in handlebar without on flat end screw thread；Positioning wedged block is set in the square opening of handle gland；To just and by pin fixing, the slot of positioning wedged block is stuck in the cross bar of the push rod combination of T shape in the hole of the hole of positioning wedged block and handle gland；The ratchet of positioning wedged block and the tooth form angle, θ of shell ratchet are 45 ° of 20 °≤θ <.Compared with the relevant technologies, the utility model is only adjusted positioning wedged block ratchet and the tooth form of shell ratchet, and to achieve the purpose that increase locking power, entire hand throttle outer dimension does not change, and can achieve the seamless switching with existing products in markets in this way.

Description

The big pulling force hand throttle of anticreep

Technical field

The utility model belongs to the hand throttle control mechanism control technology field that engineering truck uses, and relates generally to a kind of anti- Take off big pulling force hand throttle.

Background technique

The hand throttle control mechanism that engineering truck uses in existing market has frictional locking and two kinds of mechanical locking locks Only state.By Market Feedback, no matter in terms of reliability or locking power, mechanical locking will be better than frictional locking. But in actual use, however it remains the case where being unable to satisfy the requirement of vehicle locking power causes vehicle in work The problems such as causing throttle return, stall during making.

In the prior art, hand throttle increases there are two ways to locking power: first method is to increase locking nut, interior saw Torque at tooth lock washer, bolt, to achieve the purpose that increase locking power.But the defect of this method is: increased lock Only power really increases frictional force, so in use, both frictional force existed simultaneously in the rotation process of handlebar, Handlebar steering force can be made to increase, caused inconvenient.In addition frictional force can be lost with the abrasion of contact surface, to cause Locking power reduces.Another method is that the intensity of increase pressure spring makes the spine on positioning wedged block to increase the lower pressure of positioning wedged block Ratchet engagement power on tooth and shell increases, to achieve the purpose that increase locking power.But increase the intensity of pressure spring, Shi Biyao The pressure of the finger of button, is caused inconvenient when increasing unlock.The pressure of button is not more than when market common demands unlock 35N。

Utility model content

The purpose of the utility model is to overcome above-mentioned technical problem, provide it is a kind of do not influence existing control mechanism installation and Meet the big pulling force hand throttle of anticreep for increasing hand throttle locking force request in the case where performance.

The utility model provides a kind of big pulling force hand throttle of anticreep, including button, handle ball, pressure spring, handlebar, push rod group Conjunction, spring washer, plain cushion, positioning wedged block, handle gland, locking nut, internal teeth serrated lock washer, gland, washer, adjustment plain cushion and outer Shell；The button is set to the handle ball；The handle ball is the hollow round table shape of upper and lower ground perforation, and the pressure spring is set to institute It states in handle ball rotary table, upper bottom surface connects the button, and bottom surface is placed on the push rod combination；The handlebar is hollow stem； The push rod group is combined into T shape, and perpendicular end penetrates in the handlebar；The spring washer and the plain cushion are covered in the handlebar；It is described Handle gland includes square opening, and the positioning wedged block is set in the square opening of the handle gland；The positioning wedged block and the handle Gland is fixed by pin, while being stuck in the cross bar of the push rod combination of T shape；The shell, the adjustment plain cushion, the pad Circle, the gland, the internal teeth serrated lock washer are locked by bolt and lock nut, and the positioning wedged block and the shell are all Including pawl, which is characterized in that the tooth form angle, θ of the ratchet of the pawl of the ratchet of the pawl of the positioning wedged block and the shell It is 45 ° of 20 °≤θ <.

Preferably, the tooth form angle, θ of the ratchet of the pawl of the ratchet of the pawl of the positioning wedged block and the shell is 20°。

Compared with prior art, the big pulling force hand throttle of anticreep provided by the utility model has following

The utility model has the advantages that

One, only the tooth form of ratchet on the positioning wedged block and ratchet on the shell is adjusted, outside entire hand throttle Shape size does not change, and can achieve the seamless switching with existing products in markets in this way.

Two, under material and the identical situation of space width, the stress of 20 ° of tooth forms is 45 ° of tooth forms more than twice, stress condition It is significantly increased.

Detailed description of the invention

Fig. 1 is the big pulling force hand throttle general assembly schematic diagram of anticreep provided by the utility model；

The tooth form schematic diagram of the pawl of Fig. 2 prior art hand throttle；

The tooth form schematic diagram of the pawl of the hand throttle of Fig. 3 the utility model；

When Fig. 4 is active force a, tooth form force analysis shown in Fig. 2；

When Fig. 5 is active force a, tooth form force analysis shown in Fig. 3.

Specific embodiment

Below in conjunction with drawings and embodiments, the utility model is described in further detail.

Referring to Fig. 1, the big pulling force hand throttle hand throttle general assembly schematic diagram of the utility model.Anticreep provided by the utility model Big pulling force hand throttle include button 1, handle ball 2, pressure spring 3, handlebar 4, push rod combination 5, spring washer 6, plain cushion 7, positioning wedged block 8, Pin 9, locking nut 11, internal teeth serrated lock washer 12, bolt 13, gland 14, washer 15, adjustment plain cushion 16, blocks up handle gland 10 First 17 and shell 18.The button 1 is set to the handle ball 2；The pressure spring 3 is set in 2 hole of handle ball, and one end connects institute Button 1 is stated, the other end is placed on the push rod 5 and combines；The handlebar 3 is hollow stem；The push rod combination 5 is T shape, and perpendicular end is worn Enter in the handlebar 4；The spring washer 6 and 7 sets of the plain cushion are in the handlebar 4 without on flat end screw thread；The positioning card Block 8 is set in the square opening of the handle gland 10；The hole of the hole of the positioning wedged block 8 and the handle gland 10 is to just and passing through The pin 9 is fixed, and the slot of the positioning wedged block 8 is stuck in the cross bar of the push rod combination 5 of T shape；The shell 18, the adjustment Plain cushion 16, the washer 15, the gland 14, the internal teeth serrated lock washer 12 pass through the bolt 13 and the locking nut 11 lockings.The positioning wedged block 8 all includes pawl, and the pawl is gear, the ratchet and the shell 18 of the positioning wedged block 8 The tooth form angle of ratchet is 45 ° of 20 °≤θ <.

Preferably, the tooth form angle, θ of the ratchet of the positioning wedged block and the shell ratchet is 20 °, shown in Fig. 3.It please be same When refering to Fig. 4 and Fig. 5；Fig. 4 tooth form force analysis shown in Fig. 2 when being active force a；Fig. 2 is the tooth form of prior art hand throttle Schematic diagram.Tooth form stress is calculated according to formula: N=a/tg (θ/2)；N: tooth form stress, a: button releasing force, θ: tooth form Angle；

Tooth form stress=a/tg (45 °/2)=84.5a at this time.Fig. 5 tooth form force analysis shown in Fig. 3 when being active force a, Tooth form stress=a/tg (20 °/2)=198.5a at this time.It therefore deduces that, under material and the identical situation of space width, 20 ° of teeth The stress of shape is 45 ° of tooth forms more than twice, and intensity and performance are significantly increased.

The hand throttle assembly process is specific as follows:

By the push rod of T shape combination 5 from without being penetrated in the handlebar 4 to flat end, successively by the spring washer 6 and described 7 sets of plain cushion without on the screw thread to flat end, is threaded into institute for be cased with 7 end of the spring washer 6 and the plain cushion in the handlebar 4 It states in handle gland 10 and standby tight.

The handle ball 2, which is spun on the handlebar 4 by screw thread, to be had on the screw thread to flat end and for tight.By the pressure spring 3 are packed into the hole of the handle ball 2, and cover in push rod combination 5.The button 1 is pushed down into the pressure spring 3, is screwed into described push away The screw thread bottom of bar combination 5.

The positioning wedged block 8 is put into the square opening of the handle gland 10, makes the hole of the positioning wedged block 8 and the hand The hole of handle gland 10 is stuck in the slot of the positioning wedged block 8 on the cross bar of push rod combination 5 of T shape to just, then by pin 9 squeeze into the hole of handle gland 10, and pass through the hole of the positioning wedged block 8, and both ends are concordant.

The bolt 13 is penetrated into the shell 18 through centre bore, successively loads onto the component of step, the adjustment plain cushion 16, the washer 15, the gland 14, the internal teeth serrated lock washer 12 screw on the locking nut 11 and are screwed into position.

The hand throttle working principle are as follows:

The button 1 is pressed, so that the push rod combination 5 is pushed down on the positioning wedged block 8 and is rotated around the centre of gyration 1, institute The pawl of the pawl and the shell 18 of stating positioning wedged block 8 disengages, and completes unlocking motion, the handlebar 4 can be with wraparound at this time Turn the rotation of center 2.

When unclamping the button 1, the pressure spring 3 stretches, and the promoting button 1 drives the push rod combination 5 to move upwards, Push rod combination 5 pulls the positioning wedged blocks 8 rotate 1 around the centre of gyration, the pawl of the positioning wedged block 8 and the shell 18 Pawl engagement, complete locking movement, the handlebar 4 can not rotate at this time.

Compared with prior art, big pulling force hand throttle provided by the utility model is only to ratchet and shell on positioning wedged block 8 The tooth form of ratchet is adjusted on 18, and entire hand throttle outer dimension does not change, and can achieve in this way and the existing production in market The seamless switching of product.

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in Other relevant technical fields, are also included in the patent protection scope of the utility model.

Claims (2)

1. a kind of big pulling force hand throttle of anticreep, including it is the combination of button, handle ball, pressure spring, handlebar, push rod, spring washer, plain cushion, fixed Position fixture block, handle gland, locking nut, internal teeth serrated lock washer, gland, washer, adjustment plain cushion and shell；The button is set to The handle ball；The handle ball is the hollow round table shape of upper and lower ground perforation, and the pressure spring is set in the handle ball rotary table, Upper bottom surface connects the button, and bottom surface is placed on the push rod combination；The handlebar is hollow stem；The push rod group is combined into T Shape, perpendicular end penetrate in the handlebar；The spring washer and the plain cushion are covered in the handlebar；The handle gland includes side Mouthful, the positioning wedged block is set in the square opening of the handle gland；The positioning wedged block is fixed with the handle gland by pin, It is stuck in the cross bar of the push rod combination of T shape simultaneously；It is the shell, the adjustment plain cushion, the washer, the gland, described Internal teeth serrated lock washer is locked by bolt and lock nut, and the positioning wedged block and the shell all include pawl, feature It is, the tooth form angle, θ of the ratchet of the pawl of the ratchet of the pawl of the positioning wedged block and the shell is 45 ° of 20 °≤θ <.

2. the big pulling force hand throttle of anticreep according to claim 1, which is characterized in that the ratchet of the pawl of the positioning wedged block And the tooth form angle, θ of the ratchet of the pawl of the shell is 20 °.