A one-way and two-way rotation mechanism of a detent button

Abstract

The application discloses a kind of single-direction and bidirectional rotation mechanism of clamping button switching, it is related to mechanical hand field, comprising: fixed seat, planetary ratchet shaft, it is equipped with the ratchet groove that can cooperate with pawl lever;Extension sleeve is as guide sleeve, first reset module, the installation component of connecting sliding block, as the limiting component of pawl lever;Connecting sliding block can move along the axial direction of extension sleeve, and with the installation component between it is equipped with second reset module, second reset module is used to make pawl lever and ratchet groove mesh when pawl lever is in unlocking position, to limit the one-way rotation of planetary ratchet shaft;Button is used to push connecting sliding block to move towards planetary ratchet shaft, to release the limiting of extension sleeve to pawl lever locking position, so that pawl lever is in unlocking position;Guide sleeve is used to lock the position of button;First reset module, push button and guide sleeve are separated and reset, and drive pawl lever to be in locking position.The application has self-locking function.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical arm, in particular to the technical field of swing arm angle adjusting mechanism of articulated arm measuring machine, and more particularly to a mechanism for switching single and double direction rotation modes by a detent button. BACKGROUND

[0002] The articulated arm measuring machine is a new type of portable measuring equipment, which has the characteristics of convenient carrying, simple operation and large measuring range, and is suitable for industrial field measurement, jig tool assembly debugging, reverse engineering and other fields. In recent years, it has been more and more widely applied and popularized.

[0003] At present, imported articulated arm measuring machines generally have self-balancing structures for the convenience of users, but lack a locking structure for the second joint pitch rotation (except for high-end models of Hexagon). In the field use, there are often working conditions that require the second joint to be locked, such as the measured objects being concentrated in a higher or lower space. Therefore, a mechanism is needed to realize the state switching between free rotation and locking of the second joint. In particular, in the locking state, the second joint should be free to pitch, that is, it should meet the single direction rotation requirement. SUMMARY

[0004] The purpose of the present application is to provide a mechanical structure for switching single and double direction rotation modes of a joint by a detent button, to solve the technical problems mentioned in the technical background.

[0005] The technical solution for achieving the purpose of the present application is:

[0006] A detent button switching single and double direction rotation mechanism, comprising:

[0007] a fixed seat,

[0008] a planetary ratchet shaft rotationally connected with the fixed seat, for installing a rotation joint, and provided with a ratchet groove capable of cooperating with a pawl lever;

[0009] an extension sleeve, as a guide sleeve, a first reset module, a mounting part of a connecting slider, and as a limiting part of the pawl lever in the locked position and the unlocked position;

[0010] a connecting slider capable of moving axially along the extension sleeve, as a mounting part of the pawl lever, and provided with a second reset module between the mounting parts, the second reset module being used to make the pawl lever mesh with the ratchet groove when the pawl lever is in the unlocked position, so as to limit the single direction rotation of the planetary ratchet shaft, and realize the locking of the downward direction of the rotation joint;

[0011] The button is used as a pressing part to push the connecting slider to move towards the planetary ratchet shaft, so as to release the limiting of the pawl rod by the extended sleeve, and make the pawl rod be in the unlocking position.

[0012] The guide sleeve is used for locking the position of the button.

[0013] The first reset module is used for separating and resetting the button from the guide sleeve when the ratchet groove presses the pawl rod, and driving the pawl rod to be in the locking position.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] (1) The mechanism can be directly connected with the rotary joint, without the need of connecting the measuring arm through the over-protective plate like the Hexagon structure.

[0016] (2) The one-way rotation mode is provided for the second joint, instead of complete locking, so that the joint can be freely lifted while being locked, and more field working conditions can be met.

[0017] (3) The button is used for completing the rotation mode switching, the button structure has a self-locking function, without the need of being pressed for a long time to maintain a certain rotation mode, and the operation is convenient, and more in line with the actual use requirements.

[0018] (4) In the locking state, the button cannot be directly pressed to switch the rotation mode, and the user needs to lift the measuring arm by a small angle to unlock, and the anti-misoperation protection function is provided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole assembly schematic diagram of the button switching one-way and two-way rotation mechanism.

[0020] Figure 2 It is an exploded structure schematic diagram of the button switching one-way and two-way rotation mechanism.

[0021] Figure 3 It is a structure schematic diagram of the button switching one-way and two-way rotation mechanism in the two-way rotation mode.

[0022] Figure 4 It is a structure schematic diagram of the button switching one-way and two-way rotation mechanism in the one-way rotation mode.

[0023] Figure 5 It is a meshing schematic diagram of the inner ratchet surface and the pawl rod in the one-way rotation mode of the button switching one-way and two-way rotation mechanism.

[0024] Figure 6 It is a guide groove structure schematic diagram.

[0025] Figure 7 is the schematic diagram of the state of the steel ball and the guide groove being blocked when the button is at the high point.

[0026] Figure 8 is the schematic diagram of the state of the steel ball and the guide groove being blocked when the button is at the low point. Embodiment

[0027] The application will be further described below in combination with the drawings and specific embodiments.

[0028] In combination with Figure 1 , Figure 2 , the one-way and two-way rotation switching mechanism of the button includes a fixed seat 1, the side end of the fixed seat 1 is fixed with an extension sleeve 9, the fixed seat 1 is installed with a rotating bearing 2 for rotating and supporting a planetary ratchet shaft, the inner ring of the bearing 2 is installed with the planetary ratchet shaft 3, the right end inner surface of the planetary ratchet shaft 3 is processed with a circle of ratchet grooves and extends into the fixed seat extension sleeve 9, the inner cavity of the fixed seat extension sleeve 9 is designed with multiple layers of installation positions, the multiple layers of installation positions are installed with a connecting sliding block 7, the connecting sliding block 7 is provided with a sliding groove and a key groove, a small spring 6 is installed in the sliding groove, the inner ring of the small spring 6 is sleeved with a pin 5, the upper end of the pin 5 is fixedly connected with a pawl lever 4, so that the sliding direction of the pawl lever 4 in the sliding groove is parallel to the radial direction of the extension sleeve 9 or the planetary ratchet shaft 3; a key pin 8 is installed in the key groove of the connecting sliding block 7, the key pin 8 is used to connect the connecting sliding block 7 and the extension sleeve 9, so that the connecting sliding block 7 can only move axially relative to the extension sleeve 9; the right end of the connecting sliding block 7 is provided with a threaded hole, the threaded hole is connected with a button 12, the left end of the button 12 is provided with a large spring 10, the large spring 10 is installed in an installation groove 91 in the inner cavity of the extension sleeve 9, the installation groove is used to ensure the radial positioning of the large spring, facilitating the installation of the spring. The outer circle of the button 12 is opened with an annular groove, the annular groove is installed with a blocking steel ball 11, the button 12 is sleeved with a guide sleeve 20, and the guide sleeve is fixed in the extension sleeve 9 or the side end. The inner wall of the guide sleeve is opened with a guide groove 20-1 for cooperating with the blocking steel ball 11.

[0029] In combination with Figure 3 , the multiple layers of installation positions include a first installation hole 92, a second installation hole 93 and a third installation hole 94 which are sequentially arranged from inside to outside, the first installation hole 92 is close to the side end of the fixed seat 1 and is used to accommodate the planetary ratchet shaft 3; the second installation hole 93 is used to install the connecting sliding block 7 and limit the pawl lever 4 (limiting the locking position), the inner diameter of the second installation hole 93 is smaller than the inner diameter of the inner ratchet groove of the planetary ratchet shaft. When the guide sleeve is fixed in the extension sleeve 9, the third installation hole 94 is used to install the guide sleeve.

[0030] As preferred, the guide sleeve is divided into left half guide sleeve 14 and right half guide sleeve 13, which are combined by connecting pin 15 to form a complete guide sleeve. Figure 6 The guide sleeve is symmetrically spliced, and one circle has two low point clamping positions 20-11 and two high point clamping positions 20-12, Figure 7 As shown, the button is in the high point clamping position 20-12, in which state the pawl is separated from the ratchet groove, and the mechanism can rotate freely in both directions, denoted as state one; at this time, the button is pressed, and under the action of the pushing force, the clamping steel ball 11 rolls in the groove of the guide sleeve and stops at the low point clamping position 20-11, Figure 8 As shown, the button is in the high point clamping position 20-12, in which state the pawl is separated from the ratchet groove, and the mechanism can rotate freely in both directions, denoted as state one; at this time, the button is pressed, and under the action of the pushing force, the clamping steel ball 11 rolls in the groove of the guide sleeve and stops at the low point clamping position 20-11,

[0031] In the specific implementation of the mechanism, the planetary ratchet shaft 3 is provided with a key groove at the left end, and the rotating joint is directly connected with the planetary ratchet shaft 3 through a key pin. When the user lowers the rotating joint to the appropriate position, the button 12 is pressed, the button 12 drives the clamping steel ball 11 to move along the guide groove 20-1 in the guide sleeve, and simultaneously pushes the connecting slider 7 to move towards the planetary ratchet shaft 3. When the pawl lever 4 on the connecting slider 7 slides out of the second mounting hole 93 of the extension sleeve 9 and extends into the planetary ratchet shaft 3, the pawl lever 4 will pop out under the action of the small spring 6 and engage with the inner ratchet groove of the planetary ratchet shaft 3, and the connecting slider 7 is connected with the fixed seat extension sleeve 9 through the key pin 8, Figure 4 、 Figure 5 In this state, if the rotating joint continues to be lowered and rotated, it will drive the connecting slider 7 to rotate through the ratchet groove pawl cooperation, and the connecting slider 7 and the fixed seat extension sleeve 9 are connected through the key pin 8 and cannot rotate, so the locking of the rotating joint in the lowering direction is realized. As for the upward rotation, due to the cooperation characteristics of the ratchet groove pawl and the action of the small spring, it can rotate freely. At the same time, the button 12 is clamped and locked in the guide sleeve under the action of the large spring 10 and the clamping steel ball 11, and the whole mechanism is switched to the one-way rotation mode, that is, the rotating joint is locked in the lowering direction, and can be freely lifted, and the angle position after lifting continues to be locked in the lowering direction.

[0032] When the user wants to release the lower locking, press the button 12, because at this time the pawl lever 4 is engaged with the inner ratchet groove, higher than the second mounting hole 93 of the extension sleeve (limiting position of the unlocking position), press the button 12 cannot be retracted, the user needs to hold the measuring arm to lift the second joint by a small angle, the ratchet groove will press the pawl lever 4 down, and then the connecting slider 7 can slide together with the button 12 in the direction away from the planetary ratchet shaft 3 under the joint action of the large spring 10, the locking steel ball 11 and the guide sleeve, the pawl lever 4 is retracted to the inner hole of the extension sleeve 9, the separation of the ratchet groove and the pawl is realized, and the mechanism switches to the bidirectional free rotation mode. Especially, in the lower locking state, when the user does not hold the measuring arm, press the button 12, cannot contact the locking state, realizes the anti-misoperation protection function for the equipment.

Claims

1. A one-way and two-way rotation switching mechanism of a detent button, characterized in that, The utility model relates to a kind of rotary joint locking mechanism, including: Fixed seat, Planet ratchet shaft is rotatably connected with fixed seat, for installing rotary joint, and is equipped with the ratchet groove that can cooperate with pawl lever; Extension sleeve is as guide sleeve, first reset module, connecting slider mounting component, and as the limiting component of pawl lever in locking position and unlocking position; Connecting slider can move along the extension sleeve axially, as the mounting component of pawl lever, and second reset module is arranged between mounting component, and second reset module is used to make pawl lever mesh with ratchet groove when pawl lever is in unlocking position, to limit the one-way rotation of planet ratchet shaft, realize the locking of rotary joint lower direction; Button, as pressing position, for pushing connecting slider to move towards planet ratchet shaft, to release the limiting of extension sleeve to pawl lever locking position, so that pawl lever is in unlocking position; Guide sleeve is used for locking the position of button; First reset module is used to push button and guide sleeve to separate and reset when ratchet groove presses pawl lever, and drive pawl lever to be in locking position.

2. The single / dual directional rotation mechanism of claim 1, wherein, The second reset module includes second spring and pin; The connecting slider is provided with a sliding slot, and the second spring is arranged in the sliding slot; The pin is sleeved in the inner ring of the second spring; The upper end of the pin is fixedly connected with the pawl lever.

3. The single / double turning mechanism of claim 1, wherein, The first reset module uses first spring, and is arranged between button and extension sleeve.

4. The detent button switching single / dual rotation mechanism according to claim 3, characterized in that, The extension sleeve is provided with a mounting groove for radial positioning of the first spring.

5. The click button switching single / dual rotation mechanism according to claim 1, characterized in that, The connecting slider is connected with the extension sleeve by key pin.

6. The single / double directional rotation mechanism of claim 1, wherein, The outer circle of the button is provided with an annular groove, and the annular groove is mounted with a clamping steel ball; The guide sleeve is provided with a guide groove for cooperation with the clamping steel ball; The guide groove has two low-point clamping positions and two high-point clamping positions, which are used for locking the position of button in the separated and meshed state of pawl and ratchet groove.

7. The single / double turning mechanism of claim 1 or 6, wherein, The guide sleeve is divided into left half guide sleeve and right half guide sleeve, and the left half guide sleeve and the right half guide sleeve are combined by connecting pin.

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