Pedal self-locking mechanism

Abstract

The invention discloses a pedal self-locking mechanism which comprises a pedal fixing seat, a rod fixing seat, a pedal rod and a locking rod, and the rod fixing seat is fixedly connected to the pedal fixing seat; the pedal rod is connected to the pedal fixing base and the rod fixing base in a sliding mode, and the pedal rod is connected with an unlocking rod. The locking rod is connected into the pedal fixing base and the rod fixing base in a sliding mode, a limiting lock rod is arranged on the locking rod, the limiting lock rod is arranged on the rod fixing base in a sliding mode, the locking position and the unlocking position of the limiting lock rod on the rod fixing base are switched, the driving end of the unlocking rod corresponds to the end of the limiting lock rod, and when the driving end of the unlocking rod drives the limiting lock rod, the limiting lock rod is unlocked. The limiting lock rod is switched from the locking position of the rod fixing seat to the unlocking position, and the locking rod is connected with the pedal rod. According to the pedal self-locking mechanism, locking and unlocking of the mechanism need to be driven by the same structural component of the pedal, the driving structure is more simplified, manual operation is not needed, operation is easy, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of self-locking devices, and in particular to a pedal self-locking mechanism. Background Art

[0002] Single photon emission computed tomography (SPECT) is a commonly used clinical imaging device in the field of nuclear medicine. It can be used to evaluate the function of organs such as the thyroid, kidney, heart, brain, and lungs and diagnose related diseases. It also plays a major role in the clinical diagnosis and staging of a variety of malignant tumors. Compared with traditional gamma cameras, SPECT devices can not only reflect the function and morphology of organs and tissues, observe the changes of organs and diseases in a three-dimensional manner, but also display the above information in tomographic images in different directions.

[0003] When the SPECT device scans different organs, different types of collimators are needed. The collimators are generally made of lead or aluminum alloy. Therefore, the weight of a collimator is between 35kg and 135kg. It is heavy and difficult to lift and replace manually. Therefore, a collimator cart is needed to carry the temporary storage, transportation and replacement of the collimator. The collimator cart is generally placed next to the SPECT device to facilitate the replacement of the collimator. Figure 1 As shown, a probe 02 is provided on the SPECT device 01, a collimator 03 is installed at a position corresponding to the probe 02, and a collimator trolley 04 is placed next to the position where the collimator 03 is installed on the SPECT device 01. When the collimator 03 is replaced, the collimator trolley 04 needs to be fixed on one side of the SPECT device 01 and cannot move. The collimator trolley is fixed by a fixing and limiting mechanism set on the ground and a pedal self-locking mechanism on the collimator trolley 04. In the prior art, the locking and unlocking of the self-locking mechanism requires different drive structures to drive and realize, the structure is complex, and manual operation is required to achieve locking and unlocking, which is inconvenient to operate. Summary of the invention

[0004] In view of this, the present invention provides a pedal self-locking mechanism, the locking and unlocking of the mechanism need to be driven by the same structural member of the pedal, the driving structure is simpler, no manual operation is required, the operation is simple, and it is easy to use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pedal self-locking mechanism, comprising:

[0007] Footrest fixing seat;

[0008] A rod fixing seat, fixedly connected to the pedal fixing seat;

[0009] A pedal rod for applying pedal force, slidably connected to the pedal fixing seat and the rod fixing seat, and an unlocking rod is connected to the pedal rod;

[0010] A locking rod is slidably connected in the pedal fixing seat and the rod fixing seat, a limited locking rod is arranged on the locking rod, the limited locking rod is slidably arranged on the rod fixing seat, the limited locking rod switches between the locking position and the unlocking position of the rod fixing seat, the driving end of the unlocking rod is arranged corresponding to the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locking position of the rod fixing seat to the unlocking position;

[0011] The locking rod is connected with the pedal rod.

[0012] Optionally, the limit lock rod includes a cross-arranged locking rod and a limit rod, the limit rod is slidably connected to the locking rod, the limit rod is sleeved with a first spring, the first spring is sleeved on the limit rod and is located on one side of the locking rod, and the ends of the locking rod and the limit rod extend out of the locking rod.

[0013] Optionally, the rod fixing seat is provided with a first through hole for the locking rod to pass through, the side wall of the first through hole is provided with a first limiting sliding hole and a second limiting sliding hole, the locking rod is passed through the first limiting sliding hole, and the limiting rod is passed through the second limiting sliding hole;

[0014] A rotation bearing is arranged at a position of the end of the locking rod corresponding to the driving end of the unlocking rod.

[0015] Optionally, the hole length of the second limiting sliding hole is arranged along the sliding direction of the locking rod, the first limiting sliding hole is an L-shaped through hole, the L-shaped through hole comprises a first end through hole and a second end through hole which are arranged in communication, the hole length of the first end through hole is arranged along the sliding direction of the locking rod, and the hole length of the second end through hole is arranged perpendicular to the sliding direction of the locking rod;

[0016] The first end through hole and the second limiting sliding hole have the same length.

[0017] Optionally, the pedal fixing seat comprises a connecting main board, a first support plate and a second support plate, the first support plate and the second support plate are arranged at the same side of the connecting main board, the rod fixing seat is arranged between the first support plate and the second support plate, and the rod fixing seat is connected to the connecting main board;

[0018] The pedal rod is slidably connected to the first support plate, the locking rod is slidably connected to the second support plate, and the pedal rod and the locking rod are coaxially arranged.

[0019] Optionally, a second through hole is provided on the first support plate, the pedal rod is slidably connected to the second through hole, and a third through hole is provided on the second support plate, the locking rod is slidably connected to the third through hole;

[0020] The side surfaces of the first support plate and the second support plate are connected with a cover plate, and the cover plate is arranged around the outer side of the unlocking rod on the rod fixing seat.

[0021] Optionally, a guide cylinder is provided on the surface of the second support plate away from the first support plate, the third through hole penetrates the guide cylinder, the inner wall of the third through hole is provided with a limiting ring groove for placing the second spring, the groove opening of the limiting ring groove is arranged close to the first support plate, and the other end of the second spring is in contact with the limiting ring platform on the locking rod.

[0022] Optionally, the locking rod includes a connecting end and a tightening end, the end of the connecting end is provided with a first spring placement groove, a third spring is placed in the first spring placement groove, a connecting boss is provided at the bottom of the first spring placement groove, the third spring is wound around the connecting boss, the foot pedal is connected to the connecting boss through a guide bolt, and the foot pedal is slidably connected to the guide bolt.

[0023] Optionally, a third limiting sliding hole and a connecting through hole are cross-arranged at a position of the connecting end close to the abutting end, the locking rod is slidably connected to the third limiting sliding hole, and the limiting rod is connected to the connecting through hole.

[0024] Optionally, the pedal rod comprises a main rod body, one end of the main rod body close to the locking rod is provided with a second spring placement groove, and the other end is provided with a clearance groove, the clearance groove is connected with the second spring placement groove through a fourth through hole, the fourth through hole is slidably connected with a guide bolt, the tail end of the guide bolt is connected to the locking rod, and one end of the main rod body close to the locking rod is slidably connected to the locking rod;

[0025] A third spring for driving the main rod body to return to its original position is placed in the second spring placement groove.

[0026] Optionally, a connecting ring is fixedly connected to the main rod body, the connecting ring is sleeved on the outer surface of the main rod body, one end of the unlocking rod is rotatably connected to the connecting ring through a rotating shaft, and the other end of the unlocking rod is a driving end, and the driving end is correspondingly arranged with the limit lock rod;

[0027] A torsion spring for driving the main rod body to return to its original position is arranged at a position of the rotating shaft close to the main rod body.

[0028] Optionally, a limiting inclined surface and a limiting plane are provided on a side of the unlocking rod close to the connecting ring, the limiting inclined surface and the limiting plane are provided close to the rotating shaft, and a driving inclined surface is provided at the driving end of the unlocking rod, and the driving inclined surface is provided correspondingly to the end of the locking rod of the limiting locking rod located in the locking position;

[0029] One end of the torsion spring is connected to the rotating shaft, and the other end is pressed on the limiting inclined plane. The limiting plane is arranged corresponding to the limiting platform of the connecting ring.

[0030] It can be seen from the above technical scheme that the pedal self-locking mechanism provided by the present invention includes a pedal fixing seat, a rod fixing seat, a pedal rod and a locking rod. When the pedal rod is pressed down under the action of the pedal force, the limit locking rod slides to the locking position of the rod fixing seat. At this time, the locking rod falls down under the push of the pedal rod and is locked in the fixing device on the ground. When unlocking is required, the pedal rod is stepped on again, and the pedal rod on the pedal rod pushes the unlocking rod to move. The unlocking rod pushes the limit locking rod out of the locking position, so that the limit locking rod slides from the locking position to the unlocking position. At the same time, the locking rod is retracted, so that the locking rod is separated from the fixing device on the ground. The pedal self-locking mechanism is located at the right rear side of the collimator cart. After reaching the collimator replacement position, it can be locked by stepping on it. After completing the collimator replacement, it is unlocked by stepping on it and pushed away from the collimator cart. The pedal self-locking mechanism of the present invention realizes locking by stepping on a pedal rod. The locking rod is stepped down to lock it in a ground fixing device to realize positioning and fixing of the collimator trolley. When unlocking is required, the same position is stepped on to raise the locking rod and unlock the collimator trolley. The locking and unlocking of the mechanism require the same driving structure, i.e., the pedal rod drive. Compared with the prior art, the driving structure for driving locking and unlocking adopts a different structure, and the driving structure is simpler, which effectively avoids wrong operation, does not require manual operation, is simple to operate, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a SPECT device in the prior art;

[0033] Figure 2 A schematic structural diagram of a pedal self-locking mechanism provided by an embodiment of the present invention from one angle;

[0034] Figure 3A schematic structural diagram of a pedal self-locking mechanism from another angle provided in an embodiment of the present invention;

[0035] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at the AA position in FIG.

[0036] Figure 5 for Figure 4 A schematic diagram of the partial enlarged structure of part B in FIG.

[0037] Figure 6 A structural schematic diagram of a pedal self-locking mechanism provided by an embodiment of the present invention from another angle;

[0038] Figure 7 for Figure 6 A schematic cross-sectional view of the CC position in FIG.

[0039] Figure 8 A schematic cross-sectional view of the connection position between the unlocking lever and the pedal lever provided in an embodiment of the present invention;

[0040] Fig. 9 A schematic structural diagram of an angle of the pedal self-locking mechanism provided by an embodiment of the present invention after the cover plate is removed;

[0041] Fig.10 A schematic structural diagram of another angle of the pedal self-locking mechanism provided by an embodiment of the present invention after the cover plate is removed;

[0042] Fig.11 A schematic diagram of the structure of a position-limiting locking rod provided by an embodiment of the present invention at an angle;

[0043] Fig.12 A schematic structural diagram of a position-limiting locking rod provided by an embodiment of the present invention from another angle;

[0044] Fig.13 A schematic diagram of the structure of a locking rod provided in an embodiment of the present invention;

[0045] Fig.14 A schematic structural diagram of an angle of a rod fixing seat provided by an embodiment of the present invention;

[0046] Fig.15 A schematic structural diagram of a rod fixing seat provided by an embodiment of the present invention from another angle;

[0047] Fig.16 A schematic structural diagram of an angle of a footrest fixing seat provided by an embodiment of the present invention;

[0048] Fig.17 A schematic structural diagram of a footrest fixing seat provided by an embodiment of the present invention from another angle;

[0049] Fig.18 A schematic cross-sectional view of a footrest fixing seat provided in an embodiment of the present invention;

[0050] Fig.19 A schematic structural diagram of a locking rod provided by an embodiment of the present invention at an angle;

[0051] Fig. 20 A schematic structural diagram of a locking rod provided by an embodiment of the present invention from another angle;

[0052] Fig.21 for Fig. 20 A schematic cross-sectional view of the DD position in FIG.

[0053] Fig. 22 A schematic structural diagram of an angle of a pedal rod provided by an embodiment of the present invention;

[0054] Fig.23 A schematic structural diagram of a pedal rod provided by an embodiment of the present invention from another angle;

[0055] Fig.24 for Fig.23 A schematic cross-sectional structure diagram of the EE position in FIG.

[0056] Fig.25 A schematic structural diagram of an angle of the unlocking lever provided by an embodiment of the present invention;

[0057] Fig.26 A schematic structural diagram of an unlocking lever provided by an embodiment of the present invention from another angle;

[0058] Fig. 27 A schematic diagram of a structure in which an unlocking lever provided in an embodiment of the present invention is installed on a rotating shaft;

[0059] Fig.28 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention when in the initial position (after the cover plate is seen through);

[0060] Fig.29 A schematic structural diagram of a pedal self-locking mechanism provided by an embodiment of the present invention after the pedal rod is stepped on (after the cover plate is viewed through);

[0061] Fig.30 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention after the pedal rod is reset (after the cover plate is viewed through);

[0062] Fig.31 A schematic diagram of the structure in which an unlocking rod pushes a locking rod to unlock provided in an embodiment of the present invention.

[0063] in:

[0064] 01. SPECT equipment, 02. Probe, 03. Collimator, 04. Collimator cart,

[0065] 1. Footrest fixing seat,

[0066] 101, connecting main board, 102, first supporting plate, 103, second supporting plate, 104, guide cylinder, 105, third through hole, 106, second through hole, 107, third connecting hole, 108, second connecting hole, 109, limiting through hole, 110, first threaded connecting hole, 111, weight-reducing through hole, 112, limiting ring groove,

[0067] 2. Cover plate,

[0068] 3. Locking lever,

[0069] 301, first spring placement groove, 302, third limiting sliding hole, 303, limiting ring platform, 304, connecting through hole, 305, connecting end, 306, abutting end, 307, connecting boss, 308, second threaded connecting hole, 309, opening hole,

[0070] 4. Foot pedal,

[0071] 401, main rod body, 402, cover, 403, limit long groove, 404, give way groove, 405, fourth through hole, 406, second spring placement groove,

[0072] 5. The first screw,

[0073] 6. Guide bolts,

[0074] 7. Limit lock rod,

[0075] 701, limit rod, 702, locking rod, 7021, sliding connection hole, 703, rotating bearing, 704, first spring,

[0076] 8. Rod fixing seat,

[0077] 801, connecting plate, 802, connecting body, 803, first through hole, 804, second limiting sliding hole, 805, first limiting sliding hole, 806, first connecting hole,

[0078] 9. Connecting ring,

[0079] 10. The third spring,

[0080] 11. Second spring,

[0081] 12. Unlocking lever,

[0082] 1201, limiting plane, 1202, limiting inclined plane, 1203, driving inclined plane, 1204, auxiliary inclined plane,

[0083] 13. The second screw,

[0084] 14. Torsion spring,

[0085] 15. Rotating shaft. DETAILED DESCRIPTION

[0086] The invention discloses a pedal self-locking mechanism. The locking and unlocking of the mechanism need to be driven by the same structural member of the pedal. The driving structure is simpler, manual operation is not required, the operation is simple, and the use is convenient.

[0087] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] Reference Figures 2 to 27 The pedal self-locking mechanism of the present invention comprises a pedal fixing seat 1, a rod fixing seat 8, a pedal rod 4 and a locking rod 3. The pedal fixing seat 1 is used to be connected to the frame of the collimator vehicle 04. The rod fixing seat 8 is fixedly connected to the pedal fixing seat 1. The pedal rod 4 is slidably connected to the pedal fixing seat 1 and the rod fixing seat 8, and an unlocking rod 12 is connected to the pedal rod 4. The locking rod 3 is slidably connected in the pedal fixing seat 1 and the rod fixing seat 8, and the locking rod 3 is connected to the pedal rod 4. A limited locking rod 7 is provided on the locking rod 3, and the limited locking rod 7 is slidably provided on the rod fixing seat 8, so that the limited locking rod 7 switches between different positions on the rod fixing seat 8, thereby realizing the switching of the limited locking rod 7 between the locking and unlocking positions of the rod fixing seat 8. The driving end of the unlocking rod 12 is correspondingly arranged with the end of the limited locking rod 7, and when the driving end of the unlocking rod 12 drives the limited locking rod 7, the limited locking rod 7 switches from the locking position of the rod fixing seat 8 to the unlocking position.

[0089] The end of the pedal rod 4 away from the locking rod 3 is used for driving by a user applying pedal force.

[0090] The pedal self-locking mechanism of the present invention comprises a pedal fixing seat 1, a rod fixing seat 8, a pedal rod 4 and a locking rod 3. When the pedal rod 4 is pressed down by the pedal force, the limit lock rod 7 slides to the locking position of the rod fixing seat 8, and the locking rod 3 falls down under the push of the pedal rod 4 and is locked in the fixing device on the ground. When unlocking is required, the pedal rod 4 is stepped on again, and the pedal rod 4 on the pedal rod 4 pushes the unlocking rod 12 to move, and the unlocking rod 12 pushes the limit lock rod 7 out of the locking position, so that the limit lock rod 7 slides from the locking position to the unlocking position, and at the same time, the locking rod 3 is retracted, so that the locking rod 3 is separated from the fixing device on the ground. The pedal self-locking mechanism is located at the right rear side of the collimator cart. After reaching the collimator replacement position, it can be locked by stepping on it. After completing the collimator replacement, it is unlocked by stepping on it and pushed away from the collimator cart. The pedal self-locking mechanism of the present invention uses the pedal rod 4 to achieve locking. The locking rod 3 is stepped down and locked in the ground fixing device to achieve the positioning and fixation of the collimator trolley 04. When unlocking is required, the same position is stepped on by foot to raise the locking rod 3 and unlock the collimator trolley 04. The locking and unlocking of the self-locking mechanism require the same driving structure, namely the pedal rod drive. Compared with the prior art, the driving structure for driving locking and unlocking adopts a different structure, and the driving structure is simpler, which effectively avoids wrong operation, does not require manual operation, is simple to operate, and is easy to use.

[0091] like Figures 11 to 13 As shown, the limit lock rod 7 includes a locking rod 702 and a limit rod 701 arranged crosswise, the limit rod 701 is slidably connected to the locking rod 702, and a first spring 704 is sleeved on the limit rod 701, and the first spring 704 is sleeved on the side of the limit rod 701 located at the locking rod 702. Specifically, the first spring 704 is arranged at a locking position away from the locking rod 702, so that the first spring 704 can push the locking rod 702 to the locking position. The ends of the locking rod 702 and the limit rod 701 extend out of the locking rod 3. The locking rod 702 is provided with a sliding connection hole 7021, and the limit rod 701 is slidably connected in the sliding connection hole 7021. The limit rod 701 is used to limit the locking rod 702 to prevent the locking rod 702 from sliding out. In one embodiment, the limiting rod 701 is a screw rod, and the tail end of the limiting rod 701 is connected to a nut to facilitate the connection between the limiting rod 701 and the locking rod 702. Preferably, the locking rod 702 and the limiting rod 701 are arranged vertically and crosswise. The two ends of the locking rod 702 are connected to a rotating bearing 703.

[0092] For ease of installation, the rod fixing seat 8 includes a connecting plate 801 and a connecting body 802 connected together. Fig.14 and Fig.15As shown, the connecting body 802 is provided with a first through hole 803 for the locking rod 3 to pass through, and the locking rod 3 is slidably connected in the first through hole 803. A first limiting sliding hole 805 and a second limiting sliding hole 804 are provided on the side wall of the first through hole 803. There are two first limiting sliding holes 805, which are 180° apart and correspondingly arranged on the side wall of the first through hole 803. There are two second limiting sliding holes 804, which are correspondingly arranged on the side wall of the first through hole 803. The end of the locking rod 702 is inserted into the first limiting sliding hole 805, and the end of the limiting rod 701 is inserted into the second limiting sliding hole 804. The end of the locking rod 702 extends out of the first limiting sliding hole 805, and the portion of the extended end corresponding to the unlocking rod 12 is installed with a rotating bearing 703. The connecting plate 801 is provided with a first connecting hole 806, and the rod fixing seat 8 is connected to the pedal fixing seat 1 through a connecting piece connected in the first connecting hole 806, wherein the connecting piece here can be a bolt. Fig.14 As shown, four first connection holes 806 are provided, and the four first connection holes 806 are symmetrically arranged on both sides of the connecting body 802 .

[0093] In order to ensure the smooth sliding of the locking rod 3, the length of the second limiting sliding hole 804 is set along the sliding direction of the locking rod 3, and a sliding space is reserved for the locking rod 3. Among them, the first limiting sliding hole 805 is an L-shaped through hole, such as Fig.14 and Fig.15 As shown, the L-shaped through hole includes a first end through hole and a second end through hole which are connected to each other. The hole length of the first end through hole is set along the sliding direction of the locking rod 3, that is, the first end through hole is set parallel to the second limiting sliding hole 804, and the hole length of the second end through hole is set perpendicular to the sliding direction of the locking rod 3. The hole end position of the second end through hole away from the first end through hole is the corresponding locking position when the locking rod 702 slides, and the hole end position of the first end through hole away from the second end through hole is the corresponding unlocking position when the locking rod 702 slides. It can be understood that the first end through hole has the same length as the second limiting sliding hole 804, and the starting and ending positions are set to correspond, that is, the starting and ending heights correspond, so as to facilitate the sliding of the limiting locking rod 7.

[0094] The pedal fixing base 1 includes a connecting main board 101, a first supporting board 102 and a second supporting board 103. Figures 16 to 18As shown, the first support plate 102 and the second support plate 103 are arranged at intervals on the same side of the connecting main board 101. The rod fixing seat 8 is arranged between the first support plate 102 and the second support plate 103, and the rod fixing seat 8 is connected to the connecting main board 101. In order to facilitate the connection, a second connecting hole 108 is arranged on the connecting main board 101, and the second connecting hole 108 is arranged corresponding to the first connecting hole 806. The second connecting hole 108 is a threaded hole, and the first connecting hole 806 is a smooth hole. The rod fixing seat 8 is connected to the pedal fixing seat 1 through bolts connected in the first connecting hole 806 and the second connecting hole 108. In order to facilitate the connection to the frame of the collimator vehicle 04, a third connecting hole 107 is provided on the connecting main board 101, as shown in FIG. Fig.16 As shown, there are four third connection holes 107, and the four third connection holes 107 are located outside the second connection holes 108. In order to reduce the overall weight, a weight-reducing through hole 111 is provided on the pedal fixing seat 1.

[0095] In order to facilitate the sliding connection with the pedal rod 4, the first support plate 102 is provided with a second through hole 106, and the pedal rod 4 is slidably connected in the second through hole 106. In order to facilitate the sliding connection with the locking rod 3, the second support plate 103 is provided with a third through hole 105, and the locking rod 3 is slidably connected in the third through hole 105. It can be understood that in order to avoid interfering with the sliding of the pedal rod 4 and the locking rod 3, the second through hole 106 and the third through hole 105 are coaxially arranged, so that the pedal rod 4 and the locking rod 3 are coaxially arranged, which facilitates the pedal rod 4 to push the locking rod 3.

[0096] In order to protect the sliding connection structure of the pedal rod 4, the locking rod 3 and the rod fixing seat 8, the side of the first support plate 102 and the second support plate 103 are connected with a cover plate 2, and the cover plate 2 is arranged around the outer side of the unlocking rod 12 on the rod fixing seat 8. One end of the cover plate 2 is connected to the first support plate 102 by a first screw 5, and the other end is connected to the second support plate 103 by a first screw 5. In order to facilitate the connection of the first screw 5, the side of the first support plate 102 and the second support plate 103 are both provided with a first threaded connection hole 110, such as Fig.16 In order to facilitate the limit of the sliding stroke of the pedal rod 4, a limit through hole 109 is further provided on the first support plate 102, and the limit through hole 109 is connected to the second through hole 106. A limit long groove 403 is provided at a position corresponding to the limit through hole 109 on the pedal rod 4, and the tail end of the limit screw connected to the limit through hole 109 is inserted into the limit long groove 403, thereby realizing the limit of the pedal rod 4.

[0097] In one embodiment, a guide cylinder 104 is disposed on the surface of the second support plate 103 away from the first support plate 102, the third through hole 105 penetrates the guide cylinder 104, and a limiting ring groove 112 for placing the second spring 11 is disposed on the inner wall of the third through hole 105. Fig.18As shown, the opening of the limiting ring groove 112 is arranged close to the first support plate 102, and the other end of the second spring 11 contacts the limiting ring platform 303 on the locking rod 3. The second spring 11 is used to provide power for the retraction of the locking rod 3.

[0098] In order to facilitate the connection, the locking rod 3 includes a connecting end 305 and a tightening end 306. Figures 19 to 21 , the connecting end 305 is used to connect the pedal rod 4, and the abutting end 306 is used to connect with the fixing device on the ground. The end of the connecting end 305 is provided with a first spring placement groove 301, and the third spring 10 is placed in the first spring placement groove 301. The third spring 10 is used to drive the pedal rod 4 to return. In order to connect the pedal rod 4 and the locking rod 3, the bottom of the first spring placement groove 301 is provided with a connecting boss 307, and the connecting boss 307 is higher than the bottom of the first spring placement groove 301. The third spring 10 is placed between the side of the connecting boss 307 and the side of the groove of the first spring placement groove 301, and the third spring 10 is arranged around the connecting boss 307. The outer side of the connecting boss 307 can also be used to guide the third spring 10. The connecting boss 307 is provided with a second threaded connection hole 308, and the pedal rod 4 is connected to the second threaded connection hole 308 through a guide bolt 6, and the pedal rod 4 is slidably connected to the guide bolt 6. One end of the third spring 10 is limited by the bottom of the first spring placement groove 301 , and the other end is limited by the pedal rod 4 .

[0099] In order to realize the connection between the limiting lock rod 7 and the locking rod 3, the connecting end 305 of the locking rod 3 is provided with a third limiting sliding hole 302 and a connecting through hole 304 arranged crosswise near the abutting end 306, such as Fig.19 and Fig.21 As shown, the locking rod 702 is slidably connected to the third limiting sliding hole 302, and the limiting rod 701 is connected to the connecting through hole 304. In one embodiment, the third limiting sliding hole 302 and the connecting through hole 304 are vertically cross-arranged. The third limiting sliding hole 302 is arranged corresponding to the second end through hole of the first limiting sliding hole 805. The third limiting sliding hole 302 radially penetrates the connecting end 305 of the locking rod 3, and the connecting through hole 304 also radially penetrates the connecting end 305 of the locking rod 3. An opening hole 309 is provided at the end of the abutting end 306 away from the connecting end 305, and the opening hole 309 is arranged along the axial direction of the abutting end 306, and the opening hole 309 is coaxially arranged with the abutting end 306. By providing the opening hole 309, the weight of the locking rod 3 can be reduced and the strength of the structure can be ensured.

[0100] The pedal rod 4 includes a main rod body 401. Figure 22 to Figure 24The end of the main rod body 401 close to the locking rod 3 is provided with a second spring placement groove 406, in which a third spring 10 is placed for driving the main rod body 401 to reset, and the bottom of the second spring placement groove 406 is used to limit one end of the third spring 10. The other end of the main rod body 401 is provided with a clearance groove 404, which is convenient for installing the guide bolt 6. The clearance groove 404 is connected with the second spring placement groove 406 through a fourth through hole 405, which is a light hole, and a guide bolt 6 is slidably connected in the fourth through hole 405, so as to guide the main rod body 401. The tail end of the guide bolt 6 is a threaded end, and the tail end of the guide bolt 6 is threadedly connected to the second threaded connection hole 308 of the locking rod 3. The end of the main rod body 401 close to the locking rod 3 is slidably connected in the first spring placement groove 301. The top cover of the clearance groove 404 is provided with a cover 402 to prevent dust and other debris from entering the clearance groove 404 .

[0101] In order to facilitate the connection with the unlocking rod 12 and realize the limit of the unlocking rod 12, a connecting ring 9 is fixedly connected to the main rod body 401, and the connecting ring 9 is connected to the main rod body 401 through a second screw 13. The connecting ring 9 is sleeved on the outer surface of the main rod body 401. One end of the unlocking rod 12 is rotatably connected to the connecting ring 9 through a rotating shaft 15, and the other end of the unlocking rod 12 is a driving end, and the driving end is correspondingly arranged with a rotating bearing 703 on the locking rod 702 of the limit lock rod 7. The rotating shaft 15 is arranged near the main rod body 401 with a torsion spring 14 for driving the main rod body 401 to return. One end of the unlocking rod 12 rotates, so that in the process of the pedal rod 4 being pressed and retracted, the driving end of the unlocking rod 12 rotates around the rotating shaft 15, thereby avoiding the end of the locking rod 702. By arranging a rotating bearing 703 at the end of the locking rod 702, the sliding friction force is converted into a rotating friction force, reducing the friction force when the driving end of the unlocking rod 12 avoids.

[0102] In one embodiment, a side of the unlocking rod 12 close to the connecting ring 9 is provided with a limiting inclined surface 1202 and a limiting plane 1201 which are adjacently arranged. Fig.25 and Fig.26 As shown, the limiting inclined surface 1202 and the limiting plane 1201 are arranged near the rotating shaft 15. One end of the torsion spring 14 is connected to the rotating shaft 15, and the other end is pressed on the limiting inclined surface 1202, so as to press the unlocking rod 12 that has been rotated to avoid back to its original position. When the unlocking rod 12 is in its original position, the limiting plane 1201 contacts the limiting platform on the connecting ring 9, as shown in FIG. Fig. 27As shown, due to the support of the limiting surface on the connecting ring 9, the driving end of the unlocking rod 12 can push the rotating bearing 703 in the locked position to unlock. The driving end of the unlocking rod 12 is provided with a driving inclined surface 1203, and the driving inclined surface 1203 is arranged corresponding to the rotating bearing 703 of the locking rod 702 of the limiting lock rod 7 in the locked position. The driving end of the unlocking rod 12 is also provided with an auxiliary inclined surface 1204, and the auxiliary inclined surface 1204 and the driving inclined surface 1203 are arranged on opposite sides of the driving end, and the two have the same inclination angle.

[0103] The pedal self-locking mechanism provided by the present invention uses the method of stepping on the foot to achieve locking and unlocking, does not require manual operation, and frees the hands of the user. When locked, the locking rod 3 has no rebound displacement, and the locking is more reliable. Locking and unlocking the pedals in the same position are simple and practical, and have strong load-bearing capacity. In the pedal self-locking mechanism provided by the present invention, after the locking rod 3 falls, the locking rod 702 slides into the locking position limit of the first limiting slide hole 805, so that the locking rod 3 does not rebound after falling, and is directly locked, thereby achieving a locking without rebound or collapse. Since the locking rod 3 does not rebound after locking, there is no need to reserve a rebound stroke, so that the thickness of the ground fixing device can be effectively reduced, and the stumbling of personnel during use can be reduced. The internal locking structure of the pedal self-locking mechanism provided by the present invention can meet the requirements of regulations that a load of 135kg will not be deformed or damaged, and locking or unlocking can be completed by applying a very small pedal force, and the locking strength is constant.

[0104] When the pedal self-locking mechanism of the present invention is in the initial position, Fig.28 As shown, under the action of the second spring 11, the pedal rod 4 and the unlocking rod 12 are lifted up, and the locking rod 3 is lifted up, and is now in the unlocked state. When the pedal rod 4 is stepped on, the elastic force of the second spring 11 is overcome, so that the pedal rod 4, the unlocking rod 12, the locking rod 3 and the limit lock rod 7 move downward to the locked position together. At this time, the limit lock rod 7 slides to the entrance position of the second end through hole of the first limit slide hole 805, as shown in FIG. Fig.29 As shown, under the action of the first spring 704, the locking rod 702 is pushed into the locking position of the first limiting sliding hole 805 along the limiting rod 701 to achieve locking. When the foot is released, the locking rod 3 is subjected to the elastic force of the second spring 11, the locking rod 3, the pedal rod 4 and the unlocking rod 12 are lifted up, and the auxiliary inclined surface 1204 of the unlocking rod 12 passes over the surface of the rotating bearing 703, so that the driving end of the unlocking rod 12 bypasses the limiting locking rod 7, and then the unlocking rod 12 returns to the initial position under the action of the torsion spring 14, as shown in FIG. Fig.30 As shown, under the action of the third spring 10, the pedal rod 4 returns to its original position. When the pedal rod 4 is stepped on again, the pedal moves downward, the pedal rod 4 drives the unlocking rod 12 to move synchronously, and the driving inclined surface 1203 of the unlocking rod 12 pushes the locking rod 702 to move in the unlocking direction, as shown in FIG. Fig.31As shown, the arrow direction in the figure is the moving direction of each component. When the locking rod 702 moves to the first end through hole of the first limit sliding hole 805, the second spring 11 pushes the locking rod 3, the pedal rod 4, the unlocking rod 12, and the limit locking rod 7 to move upward, thereby achieving unlocking. At this point, the whole process from locking to unlocking of the pedal self-locking mechanism is completed.

[0105] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this solution.

[0106] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this solution, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0107] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0108] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pedal self-locking mechanism, characterized in that: include: Footrest fixing seat; A rod fixing seat, fixedly connected to the pedal fixing seat; A pedal rod for applying pedal force, slidably connected to the pedal fixing seat and the rod fixing seat, and an unlocking rod is connected to the pedal rod; A locking rod is slidably connected in the pedal fixing seat and the rod fixing seat, a limited locking rod is arranged on the locking rod, the limited locking rod is slidably arranged on the rod fixing seat, the limited locking rod switches between the locking position and the unlocking position of the rod fixing seat, the driving end of the unlocking rod is arranged corresponding to the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locking position of the rod fixing seat to the unlocking position; The locking rod is connected with the pedal rod.

2. The pedal self-locking mechanism according to claim 1, characterized in that: The limit lock rod includes a cross-arranged locking rod and a limit rod, the limit rod is slidably connected to the locking rod, the limit rod is sleeved with a first spring, the first spring is sleeved on the limit rod and is located on one side of the locking rod, and the ends of the locking rod and the limit rod extend out of the locking rod.

3. The pedal self-locking mechanism according to claim 2, characterized in that: The rod fixing seat is provided with a first through hole for the locking rod to pass through, the side wall of the first through hole is provided with a first limiting sliding hole and a second limiting sliding hole, the locking rod is penetrated in the first limiting sliding hole, and the limiting rod is penetrated in the second limiting sliding hole; A rotation bearing is arranged at a position of the end of the locking rod corresponding to the driving end of the unlocking rod.

4. The pedal self-locking mechanism according to claim 3, characterized in that: The hole length of the second limiting sliding hole is set along the sliding direction of the locking rod, the first limiting sliding hole is an L-shaped through hole, the L-shaped through hole includes a first end through hole and a second end through hole that are connected, the hole length of the first end through hole is set along the sliding direction of the locking rod, and the hole length of the second end through hole is set perpendicular to the sliding direction of the locking rod; The first end through hole and the second limiting sliding hole have the same length.

5. The pedal self-locking mechanism according to claim 1, characterized in that: The pedal fixing seat comprises a connecting main board, a first supporting plate and a second supporting plate, wherein the first supporting plate and the second supporting plate are arranged at the same side of the connecting main board with a spacing, and the rod fixing seat is arranged between the first supporting plate and the second supporting plate, and the rod fixing seat is connected to the connecting main board; The pedal rod is slidably connected to the first support plate, the locking rod is slidably connected to the second support plate, and the pedal rod and the locking rod are coaxially arranged.

6. The pedal self-locking mechanism according to claim 5, characterized in that: The first support plate is provided with a second through hole, the pedal rod is slidably connected to the second through hole, the second support plate is provided with a third through hole, the locking rod is slidably connected to the third through hole; The side surfaces of the first support plate and the second support plate are connected with a cover plate, and the cover plate is arranged around the outer side of the unlocking rod on the rod fixing seat.

7. The pedal self-locking mechanism according to claim 6, characterized in that: A guide cylinder is provided on the surface of the second support plate away from the first support plate, the third through hole penetrates the guide cylinder, the inner wall of the third through hole is provided with a limiting ring groove for placing the second spring, the groove opening of the limiting ring groove is arranged close to the first support plate, and the other end of the second spring is in contact with the limiting ring platform on the locking rod.

8. The pedal self-locking mechanism according to claim 2, characterized in that: The locking rod includes a connecting end and a tightening end, the end of the connecting end is provided with a first spring placement groove, a third spring is placed in the first spring placement groove, a connecting boss is provided at the bottom of the first spring placement groove, the third spring is wound around the connecting boss, the pedal rod is connected to the connecting boss through a guide bolt, and the pedal rod is slidably connected to the guide bolt.

9. The pedal self-locking mechanism according to claim 8, characterized in that: The connecting end is provided with a third limiting sliding hole and a connecting through hole arranged crosswise at a position close to the abutting end, the locking rod is slidably connected to the third limiting sliding hole, and the limiting rod is connected to the connecting through hole.

10. The pedal self-locking mechanism according to claim 1, characterized in that: The pedal rod comprises a main rod body, one end of the main rod body close to the locking rod is provided with a second spring placement groove, and the other end is provided with a clearance groove, the clearance groove is connected with the second spring placement groove through a fourth through hole, the fourth through hole is slidably connected with a guide bolt, the tail end of the guide bolt is connected to the locking rod, and one end of the main rod body close to the locking rod is slidably connected to the locking rod; A third spring for driving the main rod body to return to its original position is placed in the second spring placement groove.

11. The pedal self-locking mechanism according to claim 10, characterized in that: The main rod body is fixedly connected with a connecting ring, the connecting ring is sleeved on the outer surface of the main rod body, one end of the unlocking rod is rotatably connected to the connecting ring through a rotating shaft, and the other end of the unlocking rod is a driving end, and the driving end is correspondingly arranged with the limit lock rod; A torsion spring for driving the main rod body to return to its original position is arranged at a position of the rotating shaft close to the main rod body.

12. The pedal self-locking mechanism according to claim 11, characterized in that: A limiting inclined surface and a limiting plane are arranged on one side of the unlocking rod close to the connecting ring, the limiting inclined surface and the limiting plane are arranged close to the rotating shaft, and a driving inclined surface is arranged at the driving end of the unlocking rod, and the driving inclined surface is arranged correspondingly to the end of the locking rod of the limiting locking rod located in the locking position; One end of the torsion spring is connected to the rotating shaft, and the other end is pressed on the limiting inclined plane. The limiting plane is arranged corresponding to the limiting platform of the connecting ring.

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