Limit position protection lifting stand column

Abstract

The utility model discloses a limit protection lifting stand column which comprises a lifting stand column body, a lifting stand column driving mechanism and a lifting stand column limit protection mechanism, the lifting stand column body is a three-step lifting stand column and comprises an inner pipe, a middle pipe and an outer pipe, the inner pipe and the outer pipe are arranged on the inner side and the outer side of the middle pipe respectively and are in sliding connection with the middle pipe, the lifting stand column driving mechanism is fixedly installed on the middle pipe and fixedly connected with the outer pipe and the inner pipe respectively, the lifting stand column limiting protection mechanism is arranged in the inner pipe, one end of the lifting stand column limiting protection mechanism is fixedly connected with the middle pipe, and the other end of the lifting stand column limiting protection mechanism is fixedly connected with the lifting stand column. According to the utility model, detection of more than three position states can be realized through one limiting protection responder and only through two limiting protection switches, so that protection of mechanical and electrical systems in the lifting stand column is realized.

Description

Technical Field

[0001] The utility model relates to the field of automated machinery, in particular to a limit position protection lifting column. Background Art

[0002] As a lifting device, lifting columns are widely used in various lifting platforms, such as lifting tables, lifting chairs, liftable tatami, etc.

[0003] Currently common lifting columns generally include an inner tube, a middle tube and an outer tube that are nested with each other. A driving mechanism arranged on the lifting column drives the inner tube and the outer tube to slide back and forth relative to the middle tube, thereby realizing the lifting function.

[0004] The upper and lower limit positions of the lifting column need to be precisely controlled to avoid blocking and damage to the mechanical and electrical systems inside the system. The existing technology mainly adds expensive sensors or complex mechanical structures to perform position control, which has cost concerns and concerns about the reliability of the product structure. Utility Model Content

[0005] The main purpose of the utility model is to provide a limit position protection lifting column.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A lifting column with limit position protection comprises a lifting column body, a lifting column driving mechanism and a lifting column limit protection mechanism. The lifting column body is a three-step lifting column. The lifting column body comprises an inner tube, a middle tube and an outer tube. The inner tube and the outer tube are respectively arranged on the inner and outer sides of the middle tube and are slidably connected to the middle tube. The lifting column driving mechanism is fixedly installed on the middle tube. The lifting column driving mechanism is respectively fixedly connected to the outer tube and the inner tube. The lifting column limit protection mechanism is arranged in the inner tube, and one end of the lifting column limit protection mechanism is fixedly connected to the middle tube.

[0008] Furthermore, the lifting column driving mechanism includes a driving fixed seat, a first driving mechanism and a second driving mechanism. The driving fixed seat is fixedly installed at one end where the middle tube is connected to the outer tube. The first driving mechanism and the second driving mechanism are respectively fixedly installed on the driving fixed seat. The other end of the first driving mechanism is fixedly connected to the inner tube, and the other end of the second driving mechanism is fixedly connected to the outer tube.

[0009] Furthermore, the lifting column limit protection mechanism includes a limit protection responder assembly and a limit protection switch assembly. The limit protection responder assembly is fixedly installed in the inner tube, and the limit protection switch assembly is fixedly installed at one end of the middle tube, and the limit protection switch assembly extends into the inner tube and is slidably connected to the limit protection responder assembly.

[0010] Furthermore, the limit protection responder assembly includes a response extension arm and a response head. One end of the response extension arm is fixedly mounted on the inner tube, and the response head is fixedly mounted on the side end surface of the other end of the response extension arm.

[0011] Furthermore, the limit protection switch assembly includes a switch fixing plate, a first response switch and a second response switch, and the first response switch and the second response switch are fixedly mounted on the switch fixing plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model can realize more than three position state detections through a limit protection responder and only two limit protection switches, thereby realizing the protection of the internal mechanical and electrical systems of the lifting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an internal structure diagram of the embodiment 1 of the utility model when it is in the (1,1) state;

[0015] Figure 2 This is an internal structure diagram of Example 1 of the utility model in the (0,0) state;

[0016] Figure 3 This is a diagram of the internal structure of Example 1 of the utility model when it is in the (1,0) state.

[0017] Reference numerals

[0018] 1. Lifting column body; 2. Lifting column driving mechanism; 3. Lifting column limit protection mechanism; 101. Inner tube; 102. Middle tube; 103. Outer tube; 201. Driving fixed seat; 202. First driving mechanism; 203. Second driving mechanism; 301. Limit protection responder assembly; 302. Limit protection switch assembly; 3011. Response extension arm; 3012. Response head; 3021. Switch fixing plate; 3022. First response switch; 3023. Second response switch. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0020] Example 1

[0021] See also Figure 1-3As shown, a limit position protection lifting column includes a lifting column body 1, a lifting column driving mechanism 2 and a lifting column limit protection mechanism 3. The lifting column body 1 is a three-stage lifting column. The lifting column body 1 includes an inner tube 101, a middle tube 102 and an outer tube 103. The inner tube 101 and the outer tube 103 are respectively arranged on the inner and outer sides of the middle tube 102 and are slidably connected to the middle tube 102. The lifting column driving mechanism 2 is fixedly installed on the middle tube 102. The lifting column driving mechanism 2 is fixedly connected to the outer tube 103 and the inner tube 101 respectively. The lifting column limit protection mechanism 3 is arranged in the inner tube 101, and one end of the lifting column limit protection mechanism 3 is fixedly connected to the middle tube 102.

[0022] The lifting column driving mechanism 2 includes a driving fixed seat 201, a first driving mechanism 202 and a second driving mechanism 203. The driving fixed seat 201 is fixedly installed at one end where the middle tube 102 and the outer tube 103 are connected. The first driving mechanism 202 and the second driving mechanism 203 are fixedly installed on the driving fixed seat 201 respectively. The other end of the first driving mechanism 202 is fixedly connected to the inner tube 101, and the other end of the second driving mechanism 203 is fixedly connected to the outer tube 103.

[0023] The lifting column limit protection mechanism 3 includes a limit protection responder component 301 and a limit protection switch component 302. The limit protection responder component 301 is fixedly installed in the inner tube 101, and the limit protection switch component 302 is fixedly installed at one end of the middle tube 102. The limit protection switch component 302 extends into the inner tube 101 and is slidably connected to the limit protection responder component 301.

[0024] The limit protection responder assembly 301 includes a response extension arm 3011 and a response head 3012 . One end of the response extension arm 3011 is fixedly mounted on the inner tube 101 , and the response head 3012 is fixedly mounted on the side end surface of the other end of the response extension arm 3011 .

[0025] The limit protection switch assembly 302 includes a switch fixing plate 3021 , a first response switch 3022 and a second response switch 3023 . The first response switch 3022 and the second response switch 3023 are fixedly mounted on the switch fixing plate 3021 .

[0026] The limit protection switch assembly 302 is distributed in an up and down state along the moving direction of the inner tube 101. The triggered state is 1 and the untriggered state is 0. The two switch combinations have four states: (0, 0), (0, 1), (1, 0), and (1, 1). The lifting column contacts the limit protection responder assembly 301301 during operation. For limit position protection, three of the states can be detected for distinction. When the lifting column runs to the longest extension, it is (1, 0); when the lifting column runs to the shortest retraction, it is (1, 1); when the lifting column runs to the intermediate state, it is (0, 0).

[0027] When the lifting column detects that the limit protection switch is (1,0), the column raising action will no longer respond. When the lifting column detects that the limit protection switch is (0,0), the column raising action can be performed arbitrarily up and down. When the lifting column detects that the limit protection switch is (1,1), the column lowering action will no longer respond. In this way, the limit position protection of the lifting column system is realized.

[0028] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A lifting column with limit position protection, comprising a lifting column body (1), a lifting column driving mechanism (2) and a lifting column limit position protection mechanism (3), characterized in that: The lifting column body (1) is a three-stage lifting column, and the lifting column body (1) comprises an inner tube (101), a middle tube (102) and an outer tube (103). The inner tube (101) and the outer tube (103) are respectively arranged at the inner and outer sides of the middle tube (102) and are slidably connected to the middle tube (102). A lifting column driving mechanism (2) is fixedly installed on the middle tube (102), and the lifting column driving mechanism (2) is respectively fixedly connected to the outer tube (103) and the inner tube (101). A lifting column limit protection mechanism (3) is arranged in the inner tube (101), and one end of the lifting column limit protection mechanism (3) is fixedly connected to the middle tube (102).

2. The limit position protection lifting column according to claim 1, characterized in that: The lifting column driving mechanism (2) comprises a driving fixing seat (201), a first driving mechanism (202) and a second driving mechanism (203); the driving fixing seat (201) is fixedly mounted on one end where the middle tube (102) and the outer tube (103) are connected; the first driving mechanism (202) and the second driving mechanism (203) are respectively fixedly mounted on the driving fixing seat (201); the other end of the first driving mechanism (202) is fixedly connected to the inner tube (101); and the other end of the second driving mechanism (203) is fixedly connected to the outer tube (103).

3. The limit position protection lifting column according to claim 1, characterized in that: The lifting column limit protection mechanism (3) comprises a limit protection responder assembly (301) and a limit protection switch assembly (302); the limit protection responder assembly (301) is fixedly mounted in the inner tube (101); the limit protection switch assembly (302) is fixedly mounted at one end of the middle tube (102); and the limit protection switch assembly (302) extends into the inner tube (101) and is slidably connected to the limit protection responder assembly (301).

4. The limit position protection lifting column according to claim 3 is characterized in that: The position limiting protection responder assembly (301) comprises a response extension arm (3011) and a response head (3012); one end of the response extension arm (3011) is fixedly mounted on the inner tube (101), and the response head (3012) is fixedly mounted on the side end surface of the other end of the response extension arm (3011).

5. The limit position protection lifting column according to claim 3, characterized in that: The limit protection switch assembly (302) comprises a switch fixing plate (3021), a first response switch (3022) and a second response switch (3023); the first response switch (3022) and the second response switch (3023) are fixedly mounted on the switch fixing plate (3021).

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